Field

The present disclosure relates to an aerosol provision system and method. Background Aerosol provision (AP) systems, such as e-cigarettes, non-combustion tobacco heating systems and other aerosol delivery systems, generally hold a payload/substrate that is either a reservoir of liquid which is to be vaporised, typically comprising nicotine (this is sometimes referred to as an "e-liquid"), or a reservoir of plant material or some other (ostensibly solid) plant derivative or material from which volatiles or other liquids or particulate solids may be liberated. When a user inhales on the device, an electrical (e.g. resistive) heater is activated to vaporise a small amount of liquid or release volatiles, particulates etc., in effect producing an aerosol which is consequently inhaled by the user. The liquid may comprise nicotine in a solvent, such as ethanol or water, together with glycerine or propylene glycol to aid aerosol formation, and may also include one or more additional flavours. The plant material may comprise tobacco or a derivative. The skilled person will be aware of many different pay load formulations that may be used in AP systems.

The practice of inhaling an aerosol in this manner is commonly known as 'vaping'.

However, such AP systems are typically viewed as individual and personal items that it would be unhygienic to share with others, limiting the sociability of their use, and also potentially dissuading users from experiencing different flavour payloads that they may otherwise enjoy.

The present invention seeks to address or mitigate this problem.

Summary

In a first aspect, an aerosol provision (AP) system is provided in accordance with claim 1. In another aspect, a hand-held receptacle adapted to house an aerosol generator is provided in accordance with claim 18.

In another aspect, a method of aerosol provision is provided in accordance with claim 21.

Further respective aspects and features of the invention are defined in the appended claims. Brief Description of the Drawings

Embodiments of the present invention will now be described by way of example with reference to the accompanying drawings, in which like reference numerals designate identical or corresponding parts throughout the several views:

Figure 1 is a schematic diagram of an AP system in accordance with an embodiment of the present invention.

Figure 2 is a schematic diagram of representative lip shapes of a receptacle of an AP system in accordance with an embodiment of the present invention.

Figure 3 is a schematic diagram of an AP system in accordance with an embodiment of the present invention.

Figures 4A and 4B are illustrative examples of an AP system in accordance with an embodiment of the present invention.

Figure 5 is a schematic diagram of an AP system in accordance with an embodiment of the present invention.

Figure 6 is a schematic diagram of an AP system in accordance with an embodiment of the present invention.

Figures 7A-7D are schematic diagrams of valve arrangements for an opening in a receptacle of an AP system in accordance with an embodiment of the present invention. Figure 8 is a schematic diagram of a base of an AP system in accordance with an embodiment of the present invention.

Figure 9 is a schematic diagram of an AP system in accordance with an embodiment of the present invention.

Figure 10 is an illustrative example of an AP system in accordance with an embodiment of the present invention.

Figure 11 is a schematic diagram of a variant of the AP system of Figure 1, in accordance with an embodiment of the present invention.

Figure 12 is a flow diagram of a method of aerosol provision in accordance with an embodiment of the present invention.

Detailed Description

An aerosol provision system and method are disclosed. In the following description, a number of specific details are presented in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to a person skilled in the art that these specific details need not be employed to practice the present invention. Conversely, specific details known to the person skilled in the art are omitted for the purposes of clarity where appropriate.

As was noted previously herein, conventional AP systems such as e-cigarettes require the user to put the system in their mouth; this allows the user to draw in air and create an airflow through the device. Typically this airflow is detected and used to trigger heating of the liquid or solid payload to create an airborne payload (i.e. vapour, volatiles and/or particulates), which is then caught in the airflow to form an aerosolised payload that is inhaled by the user, although alternatively the device can be triggered via a button pressed substantially simultaneously to inhalation. It will be understood that where the description refers to 'liquid' or 'e-liquid' it encompasses equivalent solid plant matter sources, and similarly 'vapour' encompasses equivalent volatiles and particulates (i.e. those contributing to an aerosolised payload for inhalation) unless explicitly stated.

Hence in such conventional systems, inhalation by the user is important to detect when to activate the system and to provide the airflow necessary to transport aerosolised payload to the user. However this requires that the aerosol provision system is held in the user's mouth sufficiently tightly that inhalation causes sufficient air to flow through the AP system.

As a result, it may be considered unhygienic to share an AP system between several users, and particularly between acquaintances and relative strangers such as may be encountered at a dinner party or other casual social gathering. This limits the scope for a communal experience and for sharing or trying out liquids and flavours enjoyed by others in the group.

Accordingly, and referring now to Figure 1, in an embodiment of the present invention an AP system is arranged in operation to generate its own airflow.

The illustrated AP system resembles a handheld drinking glass or tumbler such as a whiskey glass or tulip-shaped bowl, although the particular appearance or material is not essential; more generally the AP system comprises a receptacle (101) arranged to house an aerosol generator (130) and provide a partially enclosed central volume (112) within which the vapour may collect. Optionally the receptacle may have a lip (114) that serves to decrease the radius of an upper opening (116) at the top of the receptacle. Referring to Figure 2, optionally the lip may take the form of a tapering of the walls to form an egg-like shape as per lip 114A, or may be substantially horizontal as per lip 114B, or may point or curve downwards in the centre as per lip 114C and lip

114 in figure 1. By pointing or curving downwards, the lip can cause vapour flowing up the inside of the receptacle walls to be diverted back into the central volume (112) of the receptacle. In this embodiment, the receptacle (101) is separable into two parts (110, 120) to facilitate cleaning and also to provide access to the aerosol generator (130).

The lower part of the receptacle (120) comprises one or more air vents (122) to allow a flow of air into the lower part of the receptacle. Similarly one or more air vents (132) in a lower part of the aerosol generator enable a flow of this air into the aerosol generator.

The aerosol generator in turn comprises a battery (142), and an airflow generator 144 (for example a so-called micro-blower such as a piezo blower, or alternatively a motorised fan or pump; alternatively a compressed air or gas source (e.g. C0 ₂ ) with an electrically actuated release may be used, but is not shown in the Figures). In operation, a blower, pump or fan draws air in through the air vents and directs it to an atomiser (145) which includes the payload (148), e.g. a reservoir of liquid or solid material as described previously herein, and a heater (146). It will be appreciated that in the case where compressed air/gas is used, then air vents may not be required in the lower part of the receptacle or aerosol generator. It will also be appreciated that the aerosol may be formed without using a heater, such as via the use of piezo-electric vibration, or other mechanical means. It is also possible to create aerosols via electro- static atomisation, and the use of such in the present atomiser is explicitly contemplated. Hence the atomiser may employ any one or more of the above mechanisms to generate an aerosol, and references herein to a heater (146) incorporate these alternatives as applicable.

The atomiser (145) operates in a similar manner to conventional AP systems, and may generate vapour in any suitable manner. For example, the payload (148) in the atomiser may hold an e- liquid directly in liquid form, or may utilise some absorbing structure, such as a foam matrix or cotton material, etc, as a retainer for the liquid. The liquid is then fed from the payload 148 to the heater (146) for atomisation (e.g. by vapourisation) to form an airborne payload. For example, the liquid may flow via capillary action from the payload (148) to the heater (146) via a wick (not shown in Figure 1). The air flow generated from the pump or air blower then combines with the airborne payload to form an aerosol, which then flows out of the atomiser.

In other instances, as noted previously herein the liquid (or equivalently volatiles or particulates) may be provided in the form of plant material or some other (ostensibly solid) plant derivative or material, typically but not necessarily based on tobacco, or any suitable botanical. In this case the liquid can be considered as representing volatiles or particulates in the material which vaporise when the material is heated without combustion. Note that AP systems containing this type of material generally do not require a wick to transport the liquid to the heater, but rather provide a suitable arrangement of the heater in relation to the material to provide suitable heating.

Alternatively the payload may be a gel or a combination such as a botanical product impregnated with a liquid, or a botanical product in a liquid or gel suspension. Similarly in principle the payload may be a botanical product, gel product and/or liquid product that are each separately vaporised within the device, potentially to varying degrees, with their respective vapours being combined and blended within the airflow. It will be appreciated that the active ingredient or ingredients within the payload may be variously soporific, neutral or stimulating as desired.

Hence an aerosol may be generated for example by heating (but not combusting) tobacco. However purely for the purposes of explanation, and without limitation, the description herein refers to the payload as liquid where specified.

The aerosol may then flow through an optional covering (134). If necessary, flow guides (136) may be provided to ensure that the aerosol passes out of the aerosol generator rather than accumulating to any significant extent within the body of the aerosol generator itself. The optional covering comprises vents to enable the aerosol vapour to pass into the central volume (112) of the AP system.

Typically the optional covering will be removable to enable access to the payload (148), which may take the form of a removable cartridge that can be replaced or interchanged with different cartridges to provide different flavours or strengths of vapour. Again, such a cartridge may operate in a similar manner to cartridges in conventional AP systems.

Alternatively, the payload may be inaccessible to the user; for example the aerosol generator may be a sealed, disposable unit.

The aerosol generator also comprises a control unit (not shown in Figure 1) and also optionally a sensor (150), discussed later herein. In the example above, where a pump, fan or blower is used, air is drawn into a lower part of the receptacle (120) and passed upwards through the atomiser (145) into the enclosed central space (112) of the receptacle (101). However, referring now to Figure 3, alternatively in an AP system 100\ the lower part (120 ) of the receptacle (10Γ) and of the aerosol generator (130 ) may not comprise air vents, and instead during operation air may be drawn through the upper opening (116) of the receptacle and through upper vents (132 ) in a first region of the upper surface of the aerosol generator (130 ) before being recirculated through one or more vents (134) in a second region of the upper surface of the aerosol generator. For example, as illustrated in Figure 3 air may be drawn in through a peripheral or circumferential set of vents or perforations (132 ) in the upper surface of the aerosol generator, before passing the aerosol out through a central region (134), in a similar manner to the output of an aerosol in Figure 1. Alternatively the air may be drawn centrally down from the opening in the receptacle to a central region of the upper surface of the aerosol generator, before passing the aerosol out through peripheral or circumferential vents or perforations into the partially enclosed central region (112) near the inside walls of the receptacle.

This may advantageously cause an internal circulation of air within the central region of the receptacle that causes an even distribution of aerosolised payload within the receptacle. However, problematically it may cause some of any existing vapour within the central region of the receptacle to be drawn into the pump, which over the course of repeated operations may impair the pump's performance. This effect can however be mitigated by suitable control of the AP system, as described later herein. Exemplary illustrations of the AP system in operation and disassembled for cleaning / cartridge replacement are shown in Figures 4A and 4B respectively.

Thus more generally, the arrangements of Figure 1 and Figure 3 provide a receptacle (101, 10 ) for an e-liquid aerosol generated by an aerosol generator within the receptacle, which in turn comprises an electrically powered air flow source such as an air blower operable to draw air into the receptacle (or in the case of compressed air release it into the receptacle) and through a atomiser that heats the liquid to generate a vapour; the vapour in turn mixes with the drawn air to form the aerosol which then flows out of the vapour generator and into the partially enclosed central volume of the receptacle.

In this way, the device can provide a contained bolus of aerosolised payload (such as vapour, volatiles, and/or particulates) that can be inhaled by a user when they pick up the receptacle and inhale the vapour through their mouth or nose near the upper opening (116) of the receptacle, thereby drawing the aerosol out of the receptacle to the user.

Notably therefore the user does not have to place the receptacle in their mouth, and furthermore the AP system is not dependent upon an inhalation by the user to generate a dose of aerosolised payload within the brief but variable period of time afforded by that action. However, it is not excluded that the user's mouth may contact the receptacle during use, and it may be that the receptacle allows for the produced vapour to be "sipped" in a manner similar to the sipping of drink from a tumbler.

Given that the AP systems of Figures 1 and 3 do not depend upon detecting inhalation to generate aerosolised payload, an alternative control mechanism for generating aerosolised payload is required.

In an embodiment of the present invention, the AP system optionally comprises a sensor (150) to detect an interaction with the receptacle by a user. The sensor may be a tilt switch, accelerometer or gyroscope to detect physical movement of the receptacle. Alternatively or in addition the sensor may be a photoresistor located on the base of the receptacle to electronically detect light when the receptacle is lifted up. In order to improve battery life, an electrically passive detector may be provided such as a photocell which generates electricity in response to the detection of light. In this case, the electronics of the aerosol generator may be off until a small voltage from the photocell triggers activation of the device, for example by supplying a small voltage to the gate of a transistor connected to the power supply, thereby allowing detected light to reactivate the aerosol generator. Alternatively or in addition, the sensor may be a physical switch in the base of the receptacle, such as a push switch that is in the off position when depressed; as a result the AP system would be off when the receptacle is placed on a surface, but would turn on when picked up. Other sensor mechanisms will be apparent to the skilled person, such as capacitance detection, allowing detection of touch of the receptacle by a user. In any event, when an interaction with the user is detected by a sensor or sensors, the aerosol generator (130, 130 ) activates to generate aerosolised payload in the manner described previously, namely by activating the electrically powered microblower, fan, pump or pressurised air source (144) to draw or introduce air into the atomiser (145) where it mixes with airborne payload to form an aerosol that is introduced into the partially enclosed central space of the receptacle. After a predetermined time period that may be determined empirically to adequately fill the receptacle with aerosolised payload, the aerosol generator stops.

In this way, the receptacle (101, 10Γ) fills with the bolus of aerosolised payload as the user picks the receptacle up to inhale from it.

Alternatively or in addition, in an embodiment of the present invention the aerosol generator may produce aerosolised payload periodically. This may serve to ensure that a bolus of aerosolised payload is available within the receptacle in the case where either there is no sensor provided, or the sensor is unable to detect interaction with the user (for example, if the user is in an environment with low lighting, it is possible that a photoresistor, photodiode or photocell may not detect an adequate change in brightness when the AP system is picked up).

Furthermore, where at least the upper part (110) of the receptacle is glass or some other transparent material, a periodic production of aerosolised payload will ensure an attractive cloud is visibly present within the receptacle, and may also remind the user either of the option to inhale the aerosolised payload, or at least that the device is on and may need to be switched off.

In this embodiment, the periodicity of aerosolised payload production is controlled by a control unit (not shown) and may at least initially be predetermined. The periodicity may also be set depending upon factors such as the size of the receptacle, the type of liquid in the reservoir, the ambient temperature, and how often the AP system detects that it is being picked up and used, if a sensor such as one of those described above is included.

The vapour generator may optionally also include one or more lights, such as for example a warm white LED. If positioned underneath the vents or perforations in the upper surface of the aerosol generator, the or each light can provide a pleasing tea-light or candle-like ambient lighting.

When the AP system is arranged to periodically produce aerosolised payload, optionally the control unit may control the light so that it changes during the aerosolised payload generation period, for example by turning on, changing intensity (either brighter or dimmer), or changing colour. When the AP system is picked up, the light may stay on, or if it is equipped with a sensor such as one of those described above, optionally it may dim or turn off so as to not strongly illuminate the user's face from below while they inhale from the receptacle.

Hence also in the case where the EP the system also generates aerosolised payload in response to being picked up, any light may change intensity or colour during the aerosolised payload generation period as described above in relation to the periodic production of aerosolised payload, but then quickly thereafter dim or turn off as the receptacle is brought closer to the user's face; alternatively any light may dim or turn off when the receptacle is picked up, and not change in response to aerosolised payload being generated.

Furthermore, whether periodically generated or generated in response to user interaction, the control unit may set a predetermined time period for aerosolised payload generation. This time period may for example correspond to the period of time required by the blower/pump/fan to draw a certain volume of air into the receptacle, or for a compressed air source to release an equivalent volume of air, where that volume is for example a predetermined percentage of the volume of air in the upper part of the receptacle. For example, an amount of equivalent to 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100% of the volume of air may be predetermined, and the time period set accordingly.

Referring particularly to the embodiment illustrated in Figure 3, the percentage of the volume of air may be selected to reduce the chances that a significant amount of aerosolised payload already in the partially enclosed central volume of the receptacle re-enters the aerosol generator. For example, it may be assumed that the air in the region surrounding the periphery of the aerosol generator comprises a relatively low proportion of aerosolised payload, so that generating smaller puffs of aerosolised payload more regularly only introduces air from a small proportion of the receptacle near to the outer vents. The precise proportion of air will depend upon the design of the receptacle and the upper surface of the aerosol generator.

Notably, because the device is not activated by airflow, the heater (146) can optionally be preheated prior to activation of airflow where this is beneficial to the atomisation process, so that airborne payload starts be generated just as the airflow begins. This helps to provide a consistent and repeatable volume of aerosolised payload with each activation of the aerosol generator.

Furthermore, the rate of airflow may optionally be controlled by the control unit through electrical control of the blower/pump/fan or compressed air source; this can be used to control the size of aerosol particles that are formed as the airborne payload mixes with the air flow. The air flow rate may vary for example depending upon the selection of e-liquid that is being vaporised. In this case, clearly the predetermined time period may vary as a function of the airflow rate to introduce the same overall intended volume of air.

Optionally, the receptacle itself may be warmed, either by conduction using a heater in aerosol generator, or by use of resistive film on the receptacle, which may be powered by electrical contacts on the aerosol generator. The warming of the receptacle may be provided to reduce the chance of aerosolised payload condensing on the inside walls of the receptacle. Optionally this may be controlled by a thermistor or other temperature sensor. Alternatively or in addition, a light (such as described above) may be used to indicate a low ambient temperature. Hence for example, the light may appear blue if a threshold temperature is detected where condensation within the receptacle is likely. Alternatively or in addition, in response to the ambient threshold being below a threshold, the airflow generator may be activated without corresponding activation of the atomiser to stir air within the receptacle and remove condensation, or if it is already operating periodically, the frequency may be increased.

It will be appreciated that the battery (142) may be replaceable, and/or rechargeable. In the case where it is rechargeable, the aerosol generator may have a charging port, or may be supplied with a corresponding charging dock onto which may be placed. Charging may be by induction, potentially enabling charging of the aerosol generator whilst it is still located in its operating position within the receptacle.

Alternatively or in addition, charging may be via contacts accessible on the outside of the aerosol generator that are brought into contact with pins or the like on the charging dock. Optionally, where air vents are incorporated into the lower part of the AP receptacle, such contacts may be accessible for charging purposes via such vents while the aerosol generator is still located in its operating position within the receptacle.

The preceding embodiments assume that the AP system is self-contained during operation, even if a charging dock is provided. However, referring now to Figure 5, in an embodiment of the invention the AP system (100 ) does not contain a battery, thereby potentially reducing the size of the aerosol generator (130 ) and also reducing the weight of the AP system itself.

Instead, a base (200) is provided, which may optionally contain a battery (242), which in turn may be of greater capacity than might otherwise be provided within the aerosol generator due to weight/size considerations. Alternatively or in addition, an external power supply maybe connected to the base to charge the battery and/or provide power together with or in lieu of the battery to the aerosol generator. The base comprises an upper surface that provides a receiving space for the receptacle (101, 10Γ). This may simply be a flat surface, or an indented or dished/concave region of corresponding shape to the receptacle.

In a case where the AP system only generates aerosolised payload periodically, the base can be connected to the aerosol generator to provide power directly, without any local power source being included within the aerosol generator. Furthermore, the control unit may also be located in the base to control the supply of power for predetermined time periods, as described previously herein.

Alternatively or in addition, where the AP system generates aerosolised payload in response to user interaction such as being picked up off the base, a temporary power source (152) may be required to drive sufficient air and generate a sufficient heat to release one bolus of aerosolised payload into the receptacle. An example temporary power source may be a suitably sized capacitor. In this case, the control unit may still be in the base, and the capacitor discharges to drive the aerosol generator in response to being electrically decoupled from the base. Alternatively the control unit (or a secondary control unit) may be located in the aerosol generator to control power use.

It will be appreciated that the example of one bolus above is non-limiting, and temporary power for two or more uses may be considered, subject to the size and weight of capacitor selected for inclusion in the aerosol generator. This would allow the AP system to be passed around several people before being returned to the base. In this case, the control unit or secondary control unit may be located in the aerosol generator to control aerosol generation in a manner similar to that described previously in relation to Figures 1 and 3.

It will be appreciated that the AP system (100 ) shown in Figure 5 has the air flow arrangement shown in Figure 1, but of course equally it may have the air flow arrangement shown in Figure 3, or indeed any other suitable air flow arrangement, such as for example via the base and up through vents on the underside of the receptacle (not shown). In this case, it would leave the walls of the lower part of the receptacle continuous, potentially making the receptacle more comfortable to hold.

It will be appreciated that the arrangement of components in Figures 1, 3 and 5 is purely illustrative and non-limiting, and that any suitable arrangement may be considered, such as for example in the case of Figures 1 and 3 the battery being a separate unit located in the base of the receptacle and/or in the case of any of these three figures, the pump, fan or blower being located downstream of the atomiser and arranged to draw air through the atomiser rather than blow air through the atomiser.

In any one of the embodiments of Figures 1, 3 and 5, optionally the air flow generator (144) (the pump, fan or blower) may be activated on its own (i.e. without a corresponding activation of the atomiser to generate aerosolised payload). This may be done to blow existing aerosolised payload held in the receptacle out through the opening (116). This may be done periodically to at least partially vacate the partially enclosed central region (112) in order to allow fresher aerosolised payload to be introduced into the receptacle. Alternatively or in addition, it may be done upon detection that the receptacle has been picked up

(optionally after a small delay in the order of tenths of seconds, or after detection of the receptacle being tipped, as if being held towards a user's nose), in order to direct the aerosolised payload within the partially enclosed central region out through the opening (116). This further assists the user in inhaling the aerosolised payload without having to come into close contact with the receptacle, and without having to touch it with their lips or nose, or place part of it within their mouths. Turning now to Figure 6, in an embodiment of the present invention, in an AP system (300) the aerosol generator (230) is also incorporated into the base (200 ).

As a result, the receptacle (301) may no longer need to be made of separable parts to provide access to an internally positioned aerosol generator. The overall shape of the receptacle may remain the same as in previous embodiments, or may adopt alternate decorative designs that are no longer constrained by the need to incorporate the aerosol generator. However in general they will still comprise a partially enclosed central volume (312) and an upper opening (316) through which a user may inhale aerosolised payload. Also as in the previous embodiments, the receptacle may comprise a lip (314) of any suitable design, as described previously herein.

Moreover, the receptacle no longer needs air vents in the lower portion of the receptacle, allowing for the walls of the receptacle to be continuous. This may be more comfortable for a user to hold. Instead, where airflow is provided by a blower, pump or fan in the base, the air vents (222) are also located in the base to allow the air to be drawn in.

In addition, the receptacle (301) comprises a lower opening (318) through which aerosolised payload is introduced into the partially enclosed central volume. Typically the effective area of the lower opening will be smaller than that of the upper opening. For example the diameter of the upper opening may be in the order of centimetres, whilst the diameter of the lower opening may be in the order of millimetres. More generally therefore the upper opening is larger than the lower opening.

By way of a non-limiting example, the diameter of the upper opening may be one, two, three, four, five, six, seven, eight, nine, or ten centimetres in diameter, whilst the diameter of the lower opening may be one, two, three, four, five, six, seven, eight, nine, or ten millimetres in diameter. It will be appreciated however that other diameters may be selected where appropriate.

More generally, as a non-limiting example the ratio of the diameters of the upper and lower openings may be 1.5: 1, 2: 1, 2.5: 1, 3: 1, 4: 1, 5: 1, 6: 1, 7: 1, 8: 1, 9:1, 10: 1, 11: 1, 12: 1, 13: 1, 14: 1, 15:1, 20: 1, 50: 1, or 100: 1, or any ratio in this range. It will be appreciated however that other ratios may be selected where appropriate. It will be appreciated that in general aerosolised payload will be introduced into the partially enclosed central space via the lower opening as part of a generated airflow from the blower, pump, fan or pressurised air source of the aerosol generator 230 through a corresponding outlet of the base (218). Once in the partially enclosed central space, the aerosolised payload cannot easily escape from the lower opening whilst the receptacle (301) remains on the base (200 ). However, when the receptacle is picked up, inertia may cause a small proportion of the air and hence also aerosolised payload within the partially enclosed central space to flow out of the lower opening. The relatively small area of the opening can be selected to reduce this effect.

Referring now also to Figures 7A - 7D, alternatively or in addition a one-way valve may be introduced into the lower opening so that the aerosolised payload can be introduced into the receptacle, but cannot exit via the lower opening. Such a valve may be constructed for example from transparent plastic so as to maintain an overall appearance of the receptacle being made from glass, if this is the chosen material.

Figure 7A illustrates the outlet (218) in the region between the atomiser 145 and the lower opening 318 of Figure 6. In this figure, a pin or other protrusion (162) is arranged to extend from the base so as to push up a biased flap (164) covering the lower opening, thereby allowing aerosolised payload into the receptacle while the receptacle is resting on the base. The biased flap returns to the closed position when no longer pushed by the pin or protrusion, and may for example be made from a transparent elastomeric or plastic material. Figures 7B and 7C illustrate the same outlet region in both side and plan view to show a similar arrangement with an 'X' shaped elastomeric valve arranged to create a more even distribution of vents into the receptacle through the lower opening so that the aerosolised payload enters the receptacle in a more visually pleasing manner.

Figure 7D illustrates an alternative valve for use in the outlet region, comprising (for example) a circular sheet of plastic, silicone or other elastomeric material, or any suitable material, that has had one or more slits cut across a portion of its width, so that the pin or protrusion can pass through the slit or confluence of slits when the receptacle is placed on the base. It will be appreciated that an equivalent arrangement can be generated by the alignment of two or more flaps of suitable material in an adjacent or overlapping manner. However, it will be appreciated that any suitable valve arrangement may be considered within the scope of the invention. Furthermore, it will be appreciated that with the provision of a valve, the absolute or relative size of the lower opening is not important with respect to allowing aerosolised payload to escape from the receptacle and so no specific size or particular ratio with respect to the upper opening need be considered, provided that an appropriate valve is in place.

Referring back to Figure 6, the base (200 ) may comprise a sensor (150') substantially similar to that described in relation to Figures 1 and 3. The sensor detects when the receptacle is resting on the base and/or when the receptacle is removed from the base. Depending on the nature of the sensor, this may be located so as to be obscured by a suitable receptacle in the case of a light- sensitive sensor, or to be depressed by the receptacle, as in the case of push switch or touch sensitive sensor. It will be appreciated that where the receptacle has a valve, then the pin or protrusion (162) illustrated in Figures 7A-C may serve a dual role of opening a valve in the receptacle and detecting that the receptacle is resting on the base, for example through placement of a pressure switch or push switch at the base of the pin or protrusion.

In this way, the control unit in the base can detect when the receptacle is suitably in place to receive a bolus of aerosolised payload from the aerosol generator (145") located in the base.

As with the embodiments illustrated by Figures 1 and 3, optionally the base may comprise lighting, such as one or more warm white LEDs to provide a tea light or candle-like effect. Again, the lighting may vary when vapour is being generated in a manner similar to that described previously herein.

It will be appreciated that the arrangement of components illustrated in the base of figure 6 is purely illustrative and non-limiting, and that any suitable arrangement may be considered, such as for example the pump, fan or blower being located downstream of the atomiser and arranged to draw air through the atomiser rather than blow air through the atomiser.

Hence for example, referring to Figure 8 an alternative embodiment may take a form of a base (200 ) comprising a receptacle, receiver or socket (210) for receiving a typical e-cigarette device (400) or other suitable AP system that comprises its own battery (442), air intake vents (422), heater (446) and liquid reservoir (448). The base still comprises a pump, fan or blower (144), and this is arranged to draw air through the e-cigarette in a manner similar to an inhalation by a user, powered by the base battery 242 or an external power source. The e-cigarette responds to the generated air flow in a normal fashion, detecting a pressure drop due to airflow and activating its heater to create liquid vapour, which mixes with the airflow to create an aerosol. This is drawn through the pump, fan or blower and, if necessary, through a flow guide 136 to an opening in the base corresponding to the lower opening in the receptacle 300. Thus the e- cigarette 400 and the pump, blower or fan 144 co-operate to function in a similar manner to the aerosol generator of preceding embodiments.

The control unit, battery (242), any sensors (150), any valve opening mechanism (162), and any lights referred to previously in relation to the base of Figure 6 may be included in the base of Figure 8. Again, the control unit may provide periodic activations of the e-cigarette, and/or in response to the receptacle (301) being placed on the base (200 ).

In this arrangement, a user can insert a compatible conventional e-cigarette into the base, thereby easily converting the e-cigarette into a multi-user, sociable device. Advantageously, the user will typically have existing familiarity with the operation of the e-cigarette (or other suitable AP system, as appropriate) and can therefore easily perform functions such as changing liquid reservoirs and the like without having to re-familiarise themselves with a new piece of equipment. Furthermore, in a social environment other users can take turns to plug their own compatible AP system into the base, thereby enabling easy sharing of different vapours in a hygienic manner. Turning now to Figure 9, a multi-receptacle AP system (400) may be provided by adapting the base of Figure 6 or Figure 8 or any suitable equivalent to form a base (500) operable to provide vapour to more than one receptacle. For example, two, three, four, five or six receptacles (or more) may be received by base having a tray with a corresponding number of placement spaces, where these spaces may typically comprise a recess corresponding in shape to a base part of the receptacles 301.

For simplicity, Figure 9 illustrates a base for two receptacles (301A, 301B). Notably, the aerosol generator does not need to be located directly beneath either receptacle, and so the aerosol generator can be arranged for example to draw air in through the top of the base using the blower, pump or fan (144) to generate an airflow over the atomiser 145, which in turn generates vapour to mix with the air flow to generate an aerosol in a similar manner to the previous embodiments. However in the present embodiment, the base 500 is operable to channel aerosolised payload to more than one receptacle along suitably formed airflow guides (536), or simply via some or all or a hollow portion of the base body.

As in the embodiments of Figure 8 and Figure 6, the control unit, battery (242), any sensors (150), any valve opening mechanism (162), and any lights referred to previously in relation to these figures may be included in the base of Figure 9. Again, the control unit may provide periodic activations of the aerosol generator, and/or in response to a receptacle (301A,B) being placed on the base (500).

Optionally, each placement space or 'docking port' may have its own sensor 150 to detect when a respective receptacle is placed on it. In this case, the control unit may provide individual control of vapour into a receptacle, either by provision of an electronically controlled valve inside the base to limit vapour flow to the placement space (in conjunction with a pin or protrusion opening a valve of the receptacle as noted previously, or simply an opening 318 as noted previously), or by providing electronic control of the pin or protrusion itself to open a valve of the receptacle (for example, by use of a solenoid). Hence in this instance, aerosolised payload may be allowed into a receptacle when it is placed on the docking port, and then cut-off either after a predetermined period corresponding to an expected time to adequately (re)fill the receptacle, or when the receptacle is removed.

An exemplary illustration of the multi-receptacle AP system is provided by Figure 10.

Variant Embodiments The above embodiments propose the use of one or more receptacle each having a partially enclosed central space 112 in which to accumulate an aerosolised payload, in conjunction with an opening 116 from which a user may inhale the aerosolised payload. This allows a user to sample the payload without necessarily touching the receptacle to their lips.

Referring now to Figure 11, this shows a variant of the embodiment illustrated in Figures 1 and 3 and described previously herein. The embodiment is substantially the same as before, except for the modifications described herein below.

In a variant embodiment, the opening lip 114 may optionally be omitted. An (optionally removable) cap 116A is placed over the open top of the receptacle 110A, and comprises a resealable top valve 116B, which may be similar to valve 164 of Figure 7A, valve 168 of Figure 7D or any suitable valve arrangement. The cap itself may comprise an annular seal (not shown) that forms a substantially airtight seal between the cap and the receptacle. The cap may also comprise an adjustable vent (not shown) that may be opened and closed, to allow easy airflow into or out of the receptacle if required. This cap and valve reduce the rate at which aerosolised payload can escape from the receptacle. This may be desirable so that the user does not feel the need to rush to inhale the contents before they escape, and also potentially to avoid waste if a proportion of the payload escapes before use.

The user then inhales from the receptacle through a straw 118 that is pushed through the top valve 116B. Typically the straw is made of glass or hard transparent plastic, though this is not essential. More generally the straw is rigid and robust when compared, for example, to a conventional drinking straw, but a drinking straw or other disposable straw is envisaged to be within the scope of the invention.

Advantageously, the straw mitigates a potential problem with the open topped version of the receptacle; where the user is inhaling the aerosolised payload at the top of the receptacle first, this means that as air enters the top of the receptacle to replace the inhaled payload, it serves to dilute the payload being drawn up by the user; the result is that it is necessary to inhale a much larger volume of air than that originally within the receptacle itself in order to inhale the aerosolised payload in the receptacle. Similarly, successive 'sips' at the open topped receptacle can appear to be successively diluted if the payload is not topped up in between.

By contrast, the straw allows the user to inhale the aerosolised payload from the bottom of the receptacle first. Consequently, air drawn into the top of the receptacle either through the valve or the optional vent during inhalation has a much smaller impact on the concentration of payload near the bottom of the straw. As a result, the user can draw up a significant proportion of the payload without it being diluted, and without needing to inhale additional quantities of air.

Typically the straw will have a similar diameter to a cigarette or e-cigarette mouthpiece, for example in the order of 4 mm - 10 mm. It will be appreciated that optionally the diameter of the straw may approximate the diameter of a conventional cigarette and hence may be in the order of 8 mm to 6 mm in diameter. In either case, as a result the user may expect a similar draw resistance (airflow resistance) to that experienced with a conventional cigarette or e-cigarette. Consequently, an optional flow limiter 119 may be fitted to one end of the straw. The limiter may comprise narrow channels, wadding or baffles to reduce the effective cross sectional area of the straw, thereby providing a similar flow resistance to a conventional cigarette or e-cigarette. Alternatively, an end of the straw may have a lip or constriction in a similar manner to a pipette that similarly acts as a flow limiter.

In a summary embodiment of the present invention, an aerosol provision (AP) system (100, 100\

100 , 300), comprises an aerosol generator (130, 130\ 130 \ 230) operable to generate aerosolised payload of vapour, volatiles and / or particulates as appropriate; and a receptacle (101, 10Γ, 301) forming a partially enclosed central space (112, 312) for holding at least a portion of said generated aerosolised payload, wherein the aerosol generator comprises an airflow generator (144) (such as a blower, pump, fan or compressed air/gas source); and the receptacle comprises a first opening (116, 316) from which a user may inhale the aerosolised payload, preferably without needing to touch the receptacle with their lips (e.g. without needing to hold the device in their mouth and inhale to generate and/or receive the vapour).

In an instance of this summary embodiment, the aerosol generator (130, 130\ 130 ) is positioned inside the receptacle (for example as per figures 1, 3, 4A, 4B and 5). The receptacle may consequently be formed of several parts in order to provide access to the aerosol generator, for example to replace a consumable payload cartridge or the like, and/or to charge or replace a battery.

In an instance of this summary embodiment, a lower part of the receptacle comprises one or more air vents (122) arranged to allow air to flow into one or more intake vents (132) of the aerosol generator. An alternative instance would place intake(s) (134) on an upper surface of the aerosol generator open to the air via the first opening (116, 316).

In an instance of this summary embodiment, the first opening (116, 316) comprises a lip (114, 314) that curves down towards the partially enclosed central space. As noted previously, this can help to redirect vapour back into the partially enclosed central space that may otherwise escape from the first opening.

In an instance of this summary embodiment, the aerosol generator comprises a heater (146) or equivalent and a payload (148), typically but not necessarily packaged together as an atomiser (145). As noted previously herein, the payload may be in a liquid form or may occur naturally (or be impregnated) within a solid material as appropriate. In an instance of this summary embodiment, the AP system comprises a base (200) arranged to support the receptacle (100 ), wherein the base comprises a power source (242) arranged in operation to electrically couple to the aerosol generator while the base is supporting the receptacle.

In an instance of this summary embodiment, the AP system comprises a base (200 ) arranged to support the receptacle (301), wherein the base comprises the aerosol generator (230). In this instance of this summary embodiment, the receptacle may comprise a second opening at the base of the receptacle to allow aerosolised payload to enter the partially enclosed central space of the receptacle.

In an instance of this summary embodiment, the AP comprises a control unit for controlling activation of the aerosol generator, wherein the control unit activates the aerosol generator in one or more selected from the following list of circumstances consisting of a predetermined period of time elapsing, the receptacle being picked up, and the receptacle being put down. In this instance of this summary embodiment, the AP system may comprise sensor (150) for detecting whether or not the receptacle has been picked up.

In an instance of this summary embodiment, the AP comprises a control unit arranged to activate the airflow generator without a corresponding activation of the atomiser (145) of the aerosol generator (130, 130\ 130 \ 230). As noted previously, this allows the AP to disperse, eject, displace or otherwise cause some or all of the aerosolised payload to leave the receptacle (101, 301) through the opening (116, 316), or reduce condensation within the receptacle.

In an instance of this summary embodiment, the receptacle (101, 10Γ, 301) is sized to be held like a drinking glass in one hand. Hence by way of a non-limiting example it may be in the order of 5, 10, or 15 cm tall, and 3, 5, 7, or 10 cm wide, typically resembling a drinking glass, whiskey tumbler or tulip-shaped bowl, such as those shown for example in the Figures.

In an instance of this summary embodiment, the receptacle (101, 10 ) comprises a first, upper part, and a re-attachable second, lower part. This allows for easy access to the aerosol generator. Considering the receptacle separately, in a summary embodiment of the present invention, a hand-held receptacle (101) adapted to house an aerosol generator (130), and comprises a first (e.g. upper) portion (110) comprising a first (e.g. upper) opening (116) through which a user may inhale an aerosol; and a second (e.g. lower) portion (120) comprising a second (e.g. lower) opening (122) arranged in operation to allow air to flow into the aerosol generator; in which the first and second portions of the receptacle are separably engaged in use to form a partially enclosed central volume (112) within which to collect a generated aerosol. As described previously, optionally the first opening may have a lip that curves down towards the partially enclosed central space.

Turning now also to Figure 12, in a summary embodiment of the present invention, a method of aerosol provision comprising: in a first step si l l, generating an airflow; in a second step si 12, generating a vapour (or equally volatiles or particulates, which may collectively be referred to herein as vapour or airborne payload) to mix with the airflow and form an aerosolised payload; in a third step si 13, providing a partially enclosed central space in a receptacle, into which the generated aerosolised payload is directed; and in a fourth steps 114, holding at least a portion of said generated aerosolised payload in the partially enclosed central space of the receptacle for inhalation by a user, without needing to touch the receptacle with their lips.

In an instance of this summary embodiment, the steps of generating an airflow and generating a vapour / airbourne payload occur within the receptacle. In another instance of this summary embodiment, the steps of generating an airflow and generating a vapour / airbourne payload occur within a base arranged to support the receptacle. It will be apparent to a person skilled in the art that variations in the above method corresponding to operation of the various embodiments of the apparatus as described and claimed herein are also considered within the scope of the present invention.

Further variant embodiments include the following:

Multiple flavours provided by the base unit - it will be appreciated that the base need not be restricted to a single aerosol generator supplying aerosolised payload to a plurality of receptacles, but instead two or more aerosol generators may be provided. In this case, different aerosol generators may be loaded with different liquid reservoirs and hence provide different flavours, strengths or other variations of aerosolised payload. Hence for example in the case of a base with four receivers for receptacles, there may be a single aerosol generator supplying all four receptacles, or two aerosol generators each supplying two receptacles, or four aerosol generators each supplying a respective receptacle, and in the case of two or four aerosol generators, then potentially different payloads may be used. In this way a user could load their receptacle with a different flavoured vapour by choosing a different receiver, or indeed create a blend of different flavours by placing their receptacle on more than one receiver. It will be appreciated that in principle this approach could also be employed within the receptacle as per figure 1 or 11, if the aerosol generators were of a sufficiently small size to allow the accommodation of two or more.

Payload carousel - again in order to provide multiple flavours from the same base unit, an aerosol generator may be adapted to accommodate a carousel holding two or more payload reservoirs, for example in a carousel for a rotatable selection or a magazine for linear selection; the carousel or magazine can be rotated/shifted to position a particular reservoir in the path of the aerosol generator in order to create a particular flavour of aerosol. The comparatively large size of the base makes accommodation of such a carousel or magazine easy, and a simple mechanical interface to move the carousel or magazine can be provided through the housing of the base (or equally controls for a motorised movement). It will be appreciated that this approach could also be employed where the aerosol generator is incorporated within the receptacle as per figure 1 or 11.

Flavour inserts - within the airflow channel (either before or after generating the aerosol) the cool or hot air, or the aerosolised payload, may pass through or over a flavoured substance so that the flavoured substance imparts some of its flavour to the aerosolised payload.

For the convenience of the user in terms of adding or removing such an insert, the flavour insert could for example be positioned in the base of the receptacle where the aerosolised payload enters, or within a straw being used to inhale the vapour (potentially also acting as an airflow restrictor to create a draw resistance similar to a traditional cigarette), or more generally at some point on the air flow path, and preferably between the location where the aerosol is formed and the user's mouth. For example an alternative insert may take the form of an air permeable capsule that fits within the midpoint of the receptacle (for example where the receptacle comes in two parts, the capsule may fit between those two parts in interlocking manner) so that the aerosolised payload must pass through the capsule before being inhaled. Another alternative may be a cylindrical plug that attaches to the lid of the receptacle, and through which the aerosolised payload is inhaled via the straw. A further alternative may be to provide a single use or limited use receptacle with a gel, oil or other flavoured substance coated or otherwise adhered to at least part of the inside surface of the receptacle or to specific structures such as fins, grilles or other shapes for example having a relatively large surface area that are included near the base of the receptacle in the flow path the aerosol as it is introduced into the receptacle. A further alternative may be to provide a single use or limited use straw with a gel, oil or other flavoured substance coated on at least part of the internal surface of the straw.

An example of the flavoured substance itself could be a tobacco plug, for example loose leaf tobacco contained in a porous container, which imparts a tobacco flavour to the aerosol. More generally the flavoured substance could be in any form, such as a single body such as a gel or tobacco plug, or smaller, loose parts such as loose leaf tobacco freely movable within an air- permeable container. It will be appreciated that the above concepts may be combined, for example so that flavour inserts may be mounted in a carousel so that the different flavours can be easily introduced into the air / aerosol flow path. It will similarly be appreciated that different flavour insert could be provided by using different straws either comprising an air/aerosol permeable plug or an inner coating, as discussed above.

Multiple supplies to a docking port - referring back to Figure 9 by way of example, an aerosol generator can supply a plurality of receptacles via appropriate ducting and a respective outlet (218) at the docking port of the receptacle. By contrast referring to figure 13, it will be appreciated that a plurality of aerosol generators can be housed within the base, each supplying a respective outlet (218A).

Combining these features in this variant embodiment, a base may comprise a plurality of aerosol generators, each of which is operably coupled to appropriate ducting to supply aerosolised payload to a plurality of receptacles. These may remain separate (for example, as mentioned previously herein two aerosol generators may respectively and separately supply two docking ports of a four-receptacle system), but alternatively they may be arranged to both supply one or more receptacles via a docking port, for example through multiple outlets (218, 218A). Alternatively, the mixing of aerosols may occur prior to flowing into a single outlet (for example, having an inverted Ύ' outlet receiving two aerosol flows, with a valve on at least one of the flows to control its introduction into a mix).

Hence (and using specific flavours purely as a non-limiting example) a first aerosol generator may supply a cherry flavoured vapour to a receptacle via a first outlet in a docking port, whilst a second aerosol generator may supply a strawberry vapour to the same receptacle via a second outlet in the same docking port, thereby providing a mix of flavours. Optionally actuation of an outlet may be selective, so that the user may select between strawberry or cherry or both. Selection may be via a mechanical restriction of the airflow or operation/disabling of a release valve, or by pressing the appropriate button related to allowing electrical actuation of one or both release valves. It will also be appreciated that in addition to simply variants of flavour, different types of payload could be mixed in this way; for example, an aerosol generated by heating tobacco (without combustion) could be blended with an aerosol generated by vaporising an e-liquid or a similar liquid or gel. Whilst it will be appreciated that the base unit may readily accommodate multiple aerosol generators in this manner, it will be appreciated that in much the same way as was noted for the multiple flavours discussed previously herein, in principle this approach could also be employed within the receptacle as per figure 1 or 11, if the aerosol generators were of a sufficiently small size to allow the accommodation of two or more. Hence difference flavours and/or aerosols generated from different payload types (e.g. heated tobacco and a liquor) could be supplied in parallel by aerosol generators within a receptacle.

Receptacle with nozzle - referring again to figure 11, as an alternative to having a cap 116A comprising an opening for a straw, the cap may comprise an integral nozzle, spout or similar mouthpiece which the user places within their mouth to inhale the aerosolised payload found within the receptacle. The receptacle may thus have a similar mode of operation to a so-called non-spill cup or 'sippy cup' . The cap or lid may be removable or integral to the receptacle (for example in the case of single use or limited use receptacles). The mouthpiece can be formed as a protrusion within the surface of the cap or lid. Alternatively, the open top of the receptacle could narrow to a sufficiently small radius that the tip of the receptacle itself can be placed within the user's mouth and acts as a nozzle directly. In this case the radius may be in the range 2 cm down to 1 mm, more preferably in the range 1.5 cm down to 2 mm, still more preferably in the range 1 cm down to 3 mm, still more preferably in the range 9 mm down to 4 mm, and still more preferably in the range 8 mm to 6 mm. Squeezable receptacle - previously herein the receptacle is referred to as being glass or plastic. It will be appreciated that the receptacle could use a deformable plastic (such as Polyethelene Terephthalate) with sufficiently thin walls to be a squeezable container. Subsequently the user may squeeze the receptacle to force or squirt the aerosolised payload into their mouth, either through an upper opening in the receptacle, or through a straw or nozzle depending on the embodiment. It will be appreciated that in this case the receptacle will comprise a valve at the lower opening, for example such as one of the valves shown in figures 7A-D, which prevents or limits aerosolised payload from escaping through the lower opening of the receptacle when it is being squeezed.

Inflatable receptacle - in a similar manner to the squeezable receptacle, the receptacle could be made from an elastomeric material such as rubber or latex so that it is inflatable like a balloon. In this case, the balloon may have only a single opening and be placed over an outlet of the base, thereby being inflated with aerosolised payload to an extent determined by the output pressure of the airflow generator and the length of time during which aerosol is applied to the inflatable receptacle. The user may then remove the receptacle and either squeeze it or let it naturally deflate in order to force the aerosolised payload into their mouth. Alternatively, the receptacle may resemble receptacles discussed previously herein in relation to the base as illustrated for example in figures 9 and 13, having an upper opening or straw and a lower input valve, but comprise an elastomeric portion that can inflate when an aerosolised payload is introduced. In this case, the upper opening or straw may have a removable cap that serves to allow a build-up of pressure within the receptacle until the cap is removed/released, enabling the elastomeric material to deflate and force vapour into the user's mouth.

Hydra receptacle - in this variant embodiment, a base supplies a receptacle that comprises a plurality of inhalation vents (e.g. upper openings, nozzles and/or top valves for straws (116B)). This enables a plurality of users to simultaneously inhale the aerosolised payload within the receptacle. To accommodate this variant use, potentially the receptacle is larger than the handheld receptacles described previously, thereby holding a larger volume of aerosolised payload and also facilitating simultaneous access in close proximity by several users. For example, the receptacle may be a glass or plastic dome or bell that can be placed over the top of the base. The base may be arranged to accommodate the dome (for example having an annular ring of silicone, and/or a circumferential trench, to receive the dome with a substantially airtight fit). The base may be arranged specifically to supply a dome, or may be similar to the base units described previously. In this latter case the dome may be used conventionally for individual hand held receptacles as described previously herein, and also in a mode where one or more of the outlets in the base is activated to supply vapour within the dome. This may be done using an electrical activation of an outlet, or by a mechanical linkage to an outlet, such as an extension of one or more pressure plates described previously herein to a position where the dome rests on the base. An equivalent variant for the receptacle of Figures 1 and 11 is to enlarge the receptacle, for example to form a spherical or ovoid bowl with a diameter between 10 and 30 cm, or more preferably between 15 and 25 cm, or more preferably approximately 20cm. The precise shape of the bowl as not essential and can be selected for aesthetic reasons. The aerosol generator resides within the bowl as described previously herein and supplies vapour. It will be appreciated that any suitable combinations from these variant embodiments and previously described embodiments may be envisaged within the scope of the invention. For example, multiple flavours may be supplied to a hydra receptacle, or different flavour inserts may be used at respective inhalation points on a hydra receptacle. Meanwhile the receptacle of figure 1 or 11 may use a nozzle instead of an opening or a valve for a straw, and some or all of the receptacle may be squeezable. Other combinations will be apparent to the skilled person.

Finally, embodiments may incorporate subject matter of the following numbered clauses:

Clause 1. An aerosol provision (AP) system, comprising:

one or more receptacles each forming a respective partially enclosed central space;

a base adapted to support the or each receptacle, the or each receptacle being removable from the base; and

an airflow generator, operable to draw air through an aerosol generator;

wherein

the base comprises one or more outlets through which, in operation, aerosolised payload is directed to flow from the base into the respective partially enclosed central space of the or each supported receptacle; and

the or each receptacle comprises a first opening from which a user may inhale the aerosolised payload, without needing to touch the receptacle with their lips.

Clause 2. An AP system according to clause 1, wherein the base comprises:

an aerosol generator operable to generate said aerosolised payload.

Clause 3. An AP system according to clause 2, in which in use the airflow generator draws air in though a region of the upper surface of the base and through the aerosol generator.

Clause 4. An AP system according to any one of clauses 2 or 3, comprising:

a control unit arranged to activate the airflow generator without a corresponding activation of an atomiser of the aerosol generator.

Clause 5. An AP system according to clause 1, wherein the base comprises:

a receiver arranged to receive a separate AP system comprising an aerosol generator, the separate AP system being operable to generate aerosolised payload in response to air being drawn through the separate AP system by the airflow generator of the base.

Clause 6. An AP system according to any one of the preceding clauses, in which

the or each receptacle comprises a second, lower opening having an area smaller than the first opening; and

the aerosolised payload is arranged to flow from the base into the respective partially enclosed central space of the or each supported receptacle through said second lower opening. Clause 7. An AP system according to clause 6, in which the second lower opening is restricted by an inlet valve to prevent aerosolised payload from flowing out of the second lower opening when the receptacle is removed from the base.

Clause 8. An AP system according to clause 7, in which the base comprises one or more valve actuators each operable to open a corresponding respective inlet valve of a receptacle when it is supported by the base.

Clause 9. An AP system according to clause 8, in which

the base comprises a control unit; and

the valve actuator selectively opens the respective inlet valve in response to a signal from the control unit.

Clause 10. An AP system according to clause 9, in which

the control unit issues a signal to the valve actuator in response to one or more selected from the list consisting of:

i. the elapse of a predetermined period of time; and

ii. the detection of a receptacle being placed on the base.

Clause 11. An AP system according to any one of the preceding claims in which the first opening comprises a lip that curves down towards the partially enclosed central space.

Clause 12. A hand-held receptacle for holding aerosolised payload, comprising:

a partially enclosed central volume;

a first upper opening from which an aerosol may be inhaled; and

a second, lower opening through which the aerosol may be introduced into the partially enclosed central volume; in which

the first upper opening is larger than the second lower opening.

Clause 13. The hand-held receptacle of clause 12, in which the second, lower opening comprises an inlet valve.

Clause 14. The hand-held receptacle of clause 12 or clause 13, in which the upper opening has a lip that curves down towards the partially enclosed central space.

Clause 15. A base unit for an aerosol provision system, comprising:

a support for one or more receptacles, the or each receptacle being removable from the base; and an airflow generator, operable to draw air through an aerosol generator; wherein

the base comprises one or more outlets through which, in operation, aerosolised payload is directed to flow from the base into the respective partially enclosed central space of the or each supported receptacle.

Clause 16. A base unit according to clause 15 wherein the base comprises:

an aerosol generator operable to generate said aerosolised payload.

Clause 17. A base unit according to clause 16, in which in use the airflow generator draws air in though a region of the upper surface of the base and through the aerosol generator.

Clause 18. A base unit according to clause 16 or 17, comprising:

a control unit arranged to activate the airflow generator without a corresponding activation of an atomiser of the aerosol generator.

Clause 19. A base unit according to clause 15 wherein the base comprises:

a receiver arranged to receive a separate AP system comprising an aerosol generator, the separate AP system being operable to generate aerosolised payload in response to air being drawn through the separate AP system by the airflow generator of the base.

Clause 20. A method of aerosol provision comprising the steps of:

providing one or more receptacles each forming a respective partially enclosed central space, the or each receptacle comprising a first opening from which a user may inhale an aerosolised payload, without touching the receptacle with their lips;

providing a base adapted to support the or each receptacle, the or each receptacle being removable from the base;

providing an airflow generator, operable to draw air through an aerosol generator; and directing aerosolised payload to flow from the base into the respective partially enclosed central space of the or each supported receptacle through one or more respective outlets of the base.

Clause 21. A method according to clause 20, wherein the base comprises an aerosol generator operable to generate said aerosolised payload.

Clause 22 A method according to clause 21, comprising the step of:

activating the aerosol generator without a corresponding activation of a heater of the aerosol generator. Clause 23. A method according to clause 20, comprising the step of

receiving at the base a separate AP system comprising an aerosol generator, the separate AP system being operable to generate aerosolised payload in response to air being drawn through the separate AP system by the airflow generator of the base.

Clause 24. A method according to any one of clauses 20 to 22, in which the or each receptacle comprises a second, lower opening having an area smaller than the first opening, the method comprising the step of:

directing the aerosolised payload to flow from the base into the respective partially enclosed central space of the or each supported receptacle through said second lower opening.

Clause 25. A method according to cl clause aim 23, comprising the step of

restricting the flow of aerosolised payload out of the second lower opening when the receptacle is removed from the base.

Clause 26. A method according to clause 24, comprising the step of

selectively opening the second lower opening in response to one or more selected from the list consisting of:

i. the elapse of a predetermined period of time; and

ii. the detection of a receptacle being placed on the base.