TECHNI CAL DOMAI N

The invention relates to one- or two-component adhesives. More particularly, the invention is in the technical field of devices for mixing and/or dispensing one- or two- component adhesives.

STATE OF THE ART

From the current state of the art, various devices are known that are suitable for applying one- or two-component adhesives. However, not all of these devices are equally efficient, ergonomic for the user, or achieve an optimal bonding result. A particular bottleneck with known devices is situated at the mixing level, which results in a carelessly mixed adhesive, a non-constant output flow, and a poor bonding result. This implies that the user of these devices must be extremely vigilant in order to detect possible problems in time and, if necessary, to adjust his actions so as to obtain a certain bonding quality. For example, US 2012/0042826 describes a device for mixing and dispensing a two- component adhesive, whereby adhesive is pumped and then mixed at the dispensing points. The number of mixers in this process is equal to the number of dispensing points, with each of these mixers creating potential problems. Moreover, the device as described herein does not allow the user to maintain a thorough overview in order to continuously monitor the adhesive quality and detect potential problems in a timely manner.

Consequently, there is a need for a device for mixing and/or dispensing a two- component adhesive that minimizes the risk of potential mixing problems and thus increases the final bonding quality, the application efficiency and ease of use.

The present invention aims to solve at least some of the above-mentioned problems or disadvantages. SUMMARY OF THE I NVENTI ON

To this end, the present invention provides a device for mixing and/or dispensing a two-component adhesive according to claim 1 . The device comprises a carrier, a first pump, a second pump, a coupling point, at least one static mixer, and at least one distribution point, which distribution point extends to at least two dispensing points.

The device according to the present invention has the advantage that the various adhesive components of the two-component adhesive are already mixed immediately after pumping, whereby an excellent and equal mixing quality is obtained over the various dispensing points. Ultimately, this leads to a higher-quality bonding result and greatly improved application efficiency and ease of use. The design of this device allows for a minimum distance between the pumps and the static mixer, so that the cooperation and compatibility between the pumps, the mixer and the used adhesive components can be quickly and efficiently evaluated and optimized.

Preferred embodiments of the device are shown in subsequent claims 2 to 14.

A second aspect of the present invention relates to a device for mixing and/or dispensing a one- and/or two-component adhesive according to claim 15, comprising a carrier, at least one motor, a disconnect able first and second rotary positive displacement pump, a disconnectable coupling point, a disconnectable static mixer and at least one disconnectable dispensing point, which dispensing point extends to at least two dispensing points.

Preferred embodiments of the device are shown in subsequent claims 16 to 19.

A third aspect of the present invention relates to a kit of the device and one or two adhesive component reservoirs according to claim 20.

In a fourth and fifth aspect, the invention relates to a method for mixing and/or dispensing a one- or two-component adhesive according to claims 21 and 22, respectively. FI GURES

Figure 1 shows a schematic representation of an embodiment of a device according to the present invention, the device comprising two dispensing points.

Figure 2 shows a schematic representation of an embodiment of a device according to the present invention, the device comprising four dispensing points.

Figure 3 shows a schematic representation of an embodiment of a device according to the present invention, the device comprising a pressure vessel.

Figure 4 shows a schematic representation of an embodiment of a device according to the present invention, the device comprising two static mixers. Figure 5a shows a schematic representation of an embodiment of a device according to the present invention, the device comprising a bypass connection.

Figure 5b shows a schematic representation of an embodiment of a device according to the present invention, the device comprising two bypass connections.

Figure 6 shows a perspective view of an embodiment of a device according to the present invention.

Figure 7 shows a front view of an embodiment of a device according to the present invention.

Figure 8 shows a side view of an embodiment of a device according to the present invention.

Figure 9 shows a perspective view of an embodiment of a device in use according to the present invention.

Figure 10a shows a perspective view of an embodiment of a device according to the present invention, with the hose set disconnected.

Figure 10b shows a perspective view of an embodiment of a hose set for a one- component adhesive according to the present invention. Figure 11 shows a perspective view of an embodiment of an adhesive component reservoir according to the present invention.

DETAI LED DESCRI PTI ON

The present invention relates in a first aspect to a device for mixing and/or dispensing a two-component adhesive.

Unless otherwise defined, all terms used in the description of the invention, including technical and scientific terms, have the meaning generally understood by those skilled in the technical field of the invention. For a better assessment of the description of the invention, the following terms are explained explicitly.

In this document, "a ^* , "an ^* and "the" refer to both the singular and the plural unless the context clearly indicates otherwise. For example, "a segment" means one or more than one segment.

The terms "comprise", "comprising", "comprised of", "providing for", "include", "including", "includes" are synonyms and are inclusive or open terms indicating the presence of what follows, which do not exclude or prevent the presence of other components, characteristics, elements, members, steps, known from or described in the state of the art.

The citation of numerical intervals through the endpoints includes all integers, fractions and/or real numbers between the endpoints, these endpoints included.

A first aspect of the present invention relates to a device for mixing and/or dispensing a two-component adhesive, the device comprising a carrier, a first pump, a second pump, a coupling point, at least one static mixer, and at least one distribution point, which distribution point extends to at least two dispensing points. The first pump is hereby coupled to said carrier, and comprises a first inlet and a first outlet, said first pump being capable of pumping a first adhesive component from the first inlet to the first outlet. The second pump is also coupled to said carrier, and comprises a second inlet and a second outlet, whereby said second pump is capable of pumping a second adhesive component from the second inlet to the second outlet. The coupling point connects the first and second outlets originating from the first and second pumps, respectively, and is thus suitable for bringing together the first and second adhesive components. Downstream of the coupling point is said static mixer, which carefully mixes the first and second adhesive components. Downstream of the static mixer, the distribution point is connected, giving rise to the aforementioned dispensing points.

In the context of the present invention, the term "two-component adhesive" designates an adhesive or ancillary substance which enables two or more objects, parts, components and/or materials, preferably permanently, to be bonded together. A two-component adhesive hereby consists of two separate adhesive components, whereby the intended adhesion is obtained only after the two components have been brought together to form a mixture, which after reacting together forms a fixed whole.

The term "carrier" refers to any object that connects, holds together or carries the various parts of the present device. A suitable carrier may consist of, but is not limited to, one or more rod-shaped or plate-shaped parts, or a combination of these, with the carrier forming a framework. The carrier can consist of different materials, for example, plastic or metal. The carrier hereby allows a user to handle the device as a whole and may be carried by the user by hand, on the shoulder or on the back, or allows the device to be supported and/or moved partly or entirely on a surface during use.

The term ^• pump” is to be understood, in the light of the present invention, as any device which enables an adhesive or adhesive component to be moved and/or pumped. Suitable pumps may include lobe pumps, peristaltic pumps, plunger pumps, roller pumps, centrifugal pumps, screw or screw-spindle pumps, or combinations thereof.

The term “coupling point” means any object which allows two or more input material streams to be assembled into an output number of material streams, which number is less than the input number of material streams. For example, a coupling point brings together 3 input material streams into 1 or 2 output material streams, or brings together 2 input material streams into 1 output material stream. In the light of the present invention, the material flow relates to an adhesive, adhesive component, or a combination of two or more adhesive components.

The terms "mixer" or "blender", and in particular "static mixer" or "static blender", refer in the context of the present invention to any mixer or blender which does not include moving parts. Static mixers may be of the laminar type or of the turbulent type. In a static mixer according to the laminar principle, the flow is repeatedly split into partial flows which are then recombined. In this way, the medium to be mixed is mixed in a large number of very thin layers, whereby the number of layers created determines the degree of mixing. In a static mixer according to the turbulent mixing principle, the mixing effect is mainly achieved by internal rotation and shearing of the layers within the liquid. This occurs at the point where the direction of rotation is reversed.

In the present context, the term "distribution point" should be interpreted as any object designated to divide a number of input material streams into a larger number of output material streams. For example, a distribution point splits 1 input material stream into two or more output material streams, or splits 2 input material streams into 3 or more output material streams. In light of the present invention, the material stream relates to an adhesive, adhesive component, or a combination of two or more adhesive components.

The term "dispensing point" or "applicator" designates any object that allows a material flow to be dispensed onto a substrate. The dispensing point is the point at which the material stream leaves the device.

The device according to the present invention has the advantage that the various adhesive components of the two-component adhesive are already mixed immediately after pumping, whereby an excellent and equal mixing quality is obtained over the various dispensing points. In this way, the user can quickly and unambiguously determine whether there are any problems with the mixing and can also respond quickly to these problems. In addition to an equal mixing quality, an equal flow rate is guaranteed at all times over the various distribution points. These advantages ultimately lead to a higher-quality bonding result and greatly improved user efficiency and convenience.

The type and/or dimensions of the static mixer can be chosen according to the adhesive components to be mixed. The design of the device under consideration results in a minimum distance between the pumps and the static mixer, which makes it possible to evaluate and optimize the cooperation and compatibility between the pumps, the mixer and the adhesive components quickly and efficiently. According to some embodiments, the first and the second pump relate to a positive displacement pump, which is exceptionally suitable in the context of the present invention. A "positive displacement pump" moves a fluid by means of repeatedly enclosing a fixed volume, which fixed volume is mechanically displaced by the pumping system . The pumping action of a positive displacement pump is so cyclic that it can in principle be driven by pistons, screws, gears, rollers, diaphragms and/or vanes. Positive displacement pumps are generally divided into two categories, namely reciprocating positive displacement pumps and rotating positive displacement pumps. Positive displacement pumps are exceptionally suitable for pumping rather viscous liquids and are particularly advantageous in the light of the present invention.

According to a further or different embodiment, the first and the second pump are rotary positive displacement pumps. Rotating positive displacement pumps perform a pumping action in particular through the propulsion of one or more rotating elements in the pump housing. Such rotating element is positioned inside the pump casing in such a way that a liquid-tight operation is obtained, creating a suction at the pump inlet. Fluid which is drawn into the pump is then trapped between the rotating element and the pump housing and moved under rotation of the rotating element from the pump inlet to the pump outlet. I n this way, a nearly constant pump flow rate is achieved. Rotating positive displacement pumps include gear pumps, lobe pumps or vane pumps. In the light of the present invention, the delivery of a constant pump flow rate is extremely advantageous in order to accurately meter the adhesive components, leading to an excellent bonding result.

Preferably the first and second pump are peristaltic pumps. A "peristaltic pump" is a liquid pump which is characterized by its specific operation. A peristaltic pump namely comprises a liquid tube, which tube lies bent against the inside of a pump housing. Centrally in the pump housing a rotor is mounted, preferably this rotor is double bearing and contains two or more shoes or cams. Due to the rotating movement of the rotor, the shoe or cam closes the pump tube and displaces the fluid in the tube in a forward direction. Due to the restoring power of the tube it then opens again and draws in new fluid. In this way an almost continuous pump flow is realized. A peristaltic pump can thus be regarded as a rotating positive displacement pump as described in the light of the present invention, in which the adhesive components do not come into direct contact with the pump parts but move through a closed pipe. The liquids could cause problems in other types of pumps, for example damage to pump parts due to corrosion by an acid, or, conversely, damage to substances in the liquid; the liquid only comes into contact with the inner wall of the pump element: a tube of plastic, such as silicone, which keeps the liquid to be pumped separate from other pump parts and thus protects both the pump and the liquid.

Peristaltic pumps are particularly suitable for pumping glue or adhesive components as peristaltic pumps form a closed tubular system in which the glue or adhesive component only comes into contact with the inside of the liquid tube. All other pump parts are exempted from the adhesive or glue component. As a result, the glue or adhesive components do not come into contact with ambient air or moisture either, which contributes to a qualitative downstream mixing and ultimately an excellent gluing result. The closed tubular system of these pumps has the additional advantage that they are easy to clean and that it is possible to switch quickly between different types of adhesive components, which ultimately contributes to increased user efficiency and convenience. When switching between different types of glue components, the fluid hose can be easily removed from the peristaltic pump for replacement by a new fluid hose. According to a further or different embodiment, the first and second pumps are a positive displacement rotary pump comprising a single rotary element. Thus, the device for mixing and/or dispensing a two-component adhesive comprises: a carrier, a first rotary positive displacement pump, a second rotary positive displacement pump, a coupling point, at least one static mixer, and at least one dispensing point, which dispensing point extends to at least two dispensing points, and wherein the first and second rotary positive displacement pumps each comprise a single rotary element. The operation of such pump is based on a fixed rotary displacement principle. Such a pump is therefore less sensitive to fluctuating line pressure, can handle an extremely wide range of viscosities and can be used within a wide range of pump capacities.

The operation of the rotating positive displacement pump described herein comprising a single rotary element, permits in particular the displacement of a precisely defined volume of an adhesive component through the pump. The single rotary element hereby comprises one or more cavities, and fits precisely into the pump housing. This ensures that each cavity forms a discrete bolus that is constrained by the rigid walls of the pump housing. Thus, as each bolus is formed under rotation of the rotating element, a vacuum is created on the inlet side, which draws an adhesive component into the bolus. Each bolus filled with adhesive component is then moved to the outlet side by the rotating element. I n order to prevent counterflow from the outlet side to the inlet side, and to allow for a smooth flow of the adhesive component, such a pump typically incorporates a spring-loaded diaphragm .

I n this case, each rotation of the single rotary element in the pump housing results in the displacement of a fixed volume of adhesive component. This is extremely advantageous as it allows very precise dispensing of a first and second adhesive component when applying a two-component adhesive. Whereas other types of pumps require a volume meter for accurate glue dispensing, the use of a rotating positive displacement pump with a single rotary element allows the volume to be set correctly, making it unnecessary to check and/or measure the volume actually dosed. The pump flow rate is also exceptionally stable, showing little or no fluctuation. The positive displacement pump containing a single rotary element also makes it virtually impossible for air to be sucked into the adhesive component, and minimizes the influence of temperature, pressure and fluid viscosity on pump accuracy.

Preferably, the first and second rotating positive displacement pumps are driven by a stepper motor or a DC motor. The setting of the rotational speed thus determines the pump flow rate and the number of rotations or revolutions determines the applied dose. The operating speed of the pumps can therefore be unambiguously determined and set by a user in order to obtain a correct pump flow and applied dose.

The pumps may be driven by a battery, rechargeable battery or mains-powered motor.

According to a further or different embodiment, the first and second pumps are each individually and independently adjustable from each other in speed and/or flow rate. Adjustment of speed and/or flow rate is extremely important if the adhesive components are to be mixed in the correct ratio. Since the liquid properties, for example the viscosity, of various adhesive components vary considerably, adjustment of the speed and/or flow rate of the pumps is therefore a particularly great advantage. The construction of the present unit, in which the static mixer is located immediately after the pumps, allows the cooperation and compatibility between the pumps, the mixer and the adhesive components to be evaluated and optimized quickly and efficiently. The static mixer is, according to some embodiments, a flexible, static mixer. This allows a variety of mixers, i.e. of different types or different dimensions to be used in the same, compact space of the device. In particular, this contributes to a very versatile device, compatible with a large variety of adhesives and/or adhesive components. Compact equipment and high versatility contribute to increased ease of use, without sacrificing mixing and/or gluing quality.

Preferably, the device includes two of the mentioned flexible, static mixers. Possibly, these static mixers are coupled in parallel, downstream of the coupling point. This allows the throughput of the adhesive and/or adhesive components to be increased, and adhesives and/or adhesive components with higher viscosity to be used. In addition, by using two static mixers, one distribution point may be eliminated in the meantime, allowing the device to be designed more compact as a whole. All this contributes to a very versatile device, compatible with a large variety of adhesives and/or adhesive components. The compact design and great versatility further contribute to increased ease of use.

According to a further or different embodiment, the device comprises at least one pressure vessel, which is connected between the first and/or second pump, respectively, and the coupling point. The term "pressure vessel" means a closed vessel, container or pipe which is filled with a gas. The gas in the pressure vessel is capable of compensating for fluctuations in pressure and/or flow rate coming from the pump, as a result of which a constant downstream flow rate of the adhesive and/or adhesive components is obtained. The levelling out of such fluctuations, immediately downstream of the pump and prior to the static mixer, contributes to an improved mix quality, a more constant output rate at the dispensing points, and ultimately an improved gluing result. A user who uses the device to apply adhesive to a substrate also appreciates the constant output flow rate at the dispensing points, since this significantly increases the ease of use and the speed at which the device is moved over the substrate needs to be less controlled and adjusted. According to some embodiments, the pressure vessel comprises a gas mixture, for example, air.

Preferably, the device comprises two of the said pressure vessels, with the pressure vessels coupled between the first and second pump, respectively, and the coupling point. Therefore, fluctuations in pressure and flow rate coming from the first and second pumps are smoothed out separately, which further enhances the mixing quality.

Some of the designs of the device include at least one closable bypass connection which connects the first pump and/or the second pump to the distribution point. Although the device is primarily designed to mix and/or dose two-component adhesives, the said bypass connection also permits the dispensing of adhesives which consist only of one adhesive component. For this purpose, the first pump and the distribution point are brought into direct contact with each other, leaving the section containing the coupling point and the static mixer out of operation. The bypass in particular allows adhesives with generally higher viscosity to be applied to a substrate using the same device. The multi-purpose use of the device for both single and two- component adhesives further contributes to the increased application efficiency and ease of use of the device.

In a further or different embodiment, the device comprises two closable bypass connections, which closable bypass connections connect the first pump and the distribution point, and the second pump and the distribution point, respectively. In some embodiments, the device comprises two closable bypass connections connecting respectively the first pump and a first distribution point, and the second pump and a second distribution point. In this way, the present device can be efficiently used for applying adhesives which consist of only one adhesive component.

According to a further or different embodiment, the static mixer is detachable and/or disconnectable. Depending on whether the device is used for the application of one or two adhesive components, the static mixer may be uncoupled or coupled respectively, whereby the adhesive component is pumped via one or more bypass connections directly between the first pump and a first distribution point, and the second pump and a second distribution point. In some embodiments, disconnecting the static mixer allows the adhesive component to be pumped directly from the first pump and the second pump to the distribution point.

The carrier includes, in a further or different embodiment, one or more attaching points for fixing the dispensing points. The dispensing points may be fixed according to a specific configuration, or the configuration may be changed depending on the intended application. This ensures an even dosage of the adhesive in a wide range of situations. In some embodiments, the attaching points are adjustable in height and/or width. Here, the configuration of the dispensing points can easily be changed in function of the intended application. A possible application is the bonding of roofing on a flat roof. Preferably, the attaching points are positioned at equal distances from each other on the carrier.

According to a further or different embodiment, the carrier comprises one or more mounting points for mounting a first and second adhesive component reservoir, which first and second adhesive component reservoirs are respectively coupled to the first and second inlets of the first and second pumps. Suitable adhesive component reservoirs are, in particular, adhesive bags or boxes. The provision of mounting points allows for different reservoir dimensions to be handled.

I n some embodiments, the support is a cart, which cart comprises at least two swivel wheels. I n these embodiments, the device can be easily moved across a surface, for example a roof surface, where the user does not have to carry the device and can thus handle it ergonomically. The swivel wheels allow flexible movement of the cart over the surface, whereby the cart can be accurately positioned and steered. As such, a user can quickly and efficiently apply a two-component adhesive to a surface simply by moving the cart at a constant speed across the surface. Use as described herein guarantees a very high quality bonding result as the dispensing points are always at the same distance from the surface. The adhesive leaving the dispensing points is applied as uniform adhesive beads on the surface. In some versions, two wheels of the trolley are equipped with a brake. I n this way, the trolley can be safely left behind during periods of disuse.

Alternatively, the carrier is a hand-, shoulder-, or back-mounted frame. I n this case, the dispensing points extend from the carrier to a surface to be bonded. In some implementations, the dispensing points are supported by a secondary support frame, equipped with one or more wheels.

Preferably, the cart comprises a handle, whereby the handle and the dispensing points are located at the same end of the cart. This specific orientation is particularly advantageous in view of the intended bonding result, user efficiency, ease of use and user safety. Where the handle and dispensing points are usually oriented on opposite sides of a trolley, a user has little overview of the applied adhesive. The applied adhesive is not optimally visible and any problems during bonding are quite difficult and/or late to identify. At best, a user should regularly interrupt the bonding process to check the quality of the applied adhesive and/or adhesive beads. If he pulls the cart backwards, the situation is also unsafe, particularly when bonding a roof surface. If the user pushes the cart forward, there is a risk of stepping into the applied adhesive and/or adhesive beads. The cart according to the present invention, however, comprises the handle and dispensing points at the same end, allowing the user to have an excellent view of the adhesive result at all times and to push the cart, thereby reducing the risk of stepping into the adhesive already applied.

Preferably, the handle is extendable in its spring direction. More preferably, the handle for this purpose comprises an extendable element that extends laterally from the cart. The extendable handle allows the user to push the cart and to step alongside the cart. The risk of stepping into the already applied adhesive is thereby further reduced.

In some embodiments, the dispensing points are equipped with a membrane and/or mechanical seal at their ends. This makes it possible to interrupt the bonding process without exposing the adhesive in the dispensing points to ambient air or moisture. When bonding is resumed, optimum quality remains guaranteed. In some embodiments, the dispensing points and/or the attachment points to which the dispensing points are connected are tiltable and/or bendable. This allows the orientation of the dispensing points to be changed such that the opening of the dispensing points through which the adhesive and/or adhesive component leaves the dispensing points is directed respectively towards, or away from, the surface to be bonded. When the equipment is put into operation, the dispensing points, in particular their opening, should preferably be oriented towards the surface to be bonded. In this orientation, dispensing of the adhesive and/or adhesive component on the surface to be bonded is possible. However, when the device is at rest, e.g. when the gluing process is paused or when the glue is changed, the dispensing points, in particular their opening, are preferably oriented away from the surface to be glued. This essentially upward orientation efficiently prevents glue and/or glue components from dripping from the dispensing points when the device is not in use. Preferably, the dispensing points and/or the attachment points are hinged to the trolley for this purpose.

According to some or other embodiments, the device comprises one or more heating elements which allow the viscosity of the adhesive and/or adhesive components to be regulated as a function of the ambient temperature. This is particularly advantageous when bonding materials in cold conditions, for example when bonding a roof surface in cold weather. Said heating elements may be located immediately upstream and/or downstream of the pumps, immediately upstream and/or downstream of the static mixer, or a combination thereof. I n some embodiments, the device includes an insulating cover which is located around the first and/or second adhesive component reservoir. This is particularly advantageous when bonding materials in cold and/or hot conditions, in order to be able to maintain the anticipated adhesive components within a desired temperature range.

I n some embodiments, the device includes an identification device which allows identification of the adhesive components, whereby the device adjusts and/or suggests one or more parameters for use of the device with the specific adhesive components used. These parameters may include the choice of static mixer, the flow rate and/or the speed of the pumps, etc. Said identification device may be a barcode and/or QR code scanner.

According to a further or different embodiment, the device includes a user interface, which user interface allows the various controllable parameters described herein to be set. Such controllable parameters include the speed and/or flow rate of the first and/or second pump, the temperature of possible heating elements, or combinations thereof.

A second aspect of the present invention relates to a device for mixing and/or dispensing a one- and/or two-component adhesive, the device comprising:

- a carrier,

- at least one motor,

- a first rotating positive displacement pump, which first pump is motor driven, which first pump includes a first inlet and a first outlet, said first pump being capable of pumping a first adhesive component from the first inlet to the first outlet, a second rotary positive displacement pump, which second pump is driven by the motor, and which second pump comprises a second inlet and a second outlet, said second pump being suitable for pumping a second adhesive component from the second inlet to the second outlet, a coupling point for joining the first and second adhesive components, which coupling point is suitable for joining the first and second exhausts from the first and second pumps respectively, a static mixer, which static mixer is suitable for mixing the first and second adhesive components coming from the coupling point, and at least one distribution point, having the characteristic that the first rotary positive displacement pump, the second rotary positive displacement pump, the coupling point, the static mixer and the distribution point are each disconnectable from the carrier, and where the distribution point extends to at least two dispensing points.

Rotary positive displacement pumps as described herein perform, in particular, a pumping action by means of the propulsion of one or more rotating elements in the pump housing. Such rotating element is placed in the pump housing in such a way that a fluid-tight operation is obtained, whereby a suction is created at the pump inlet. Fluid which is drawn into the pump is then trapped between the rotating element and the pump housing and moved under rotation of the rotating element from the pump inlet to the pump outlet. In this way, a nearly constant pump flow rate is achieved. Rotary positive displacement pumps include gear pumps, lobe pumps or vane pumps. In the light of the present invention, the delivery of a constant pump flow rate is extremely advantageous in order to accurately meter the adhesive components, leading to an excellent bonding result. The operation of such pumps is based on a rotary fixed displacement principle. Such pumps are therefore less sensitive to fluctuating line pressure, can handle an extremely wide range of viscosities and can be used within a wide range of pump capacities.

Due to the detachable nature of the first rotary positive displacement pump, the second rotary positive displacement pump, the coupling point, the static mixer and the distribution point, the device is not only multifunctional, but also very convenient to clean. Also, when changing between used adhesive components, the detachable nature of the aforementioned elements allows for a quick and efficient changeover. In what follows, the assembly comprising the first rotary positive displacement pump, the second rotary positive displacement pump, the coupling point, the static mixer, the distribution point, or combinations thereof, is referred to as the "hose set". The assembly of the hose set as described herein is potentially disposable and/or replaceable, which allows for user-friendly changing between adhesive components. In particular, adhesive components with a viscosity between 100 and 200000 cP at 20 °C are pumped exceptionally smoothly and accurately by the device according to the present invention. The "viscosity" of a substance is a measure of its resistance to gradual deformation under the influence of shear or tensile stress. Viscosity can be measured using various viscometers or rheometers, for example a glass, capillary viscometer, as known in the current state of the art. Since the resistance to deformation, or more specifically in the case of liquids to flow, under the influence of shear stress or tensile stress is temperature-dependent, viscosity is always expressed in combination with the measuring temperature. In the context of the present invention, use is made of a "Brookfield DVE viscometer", which uses a spindle immersed in the adhesive component, which spindle is rotated around a calibrated spring. The resistance of the glue compound to the spindle is measured by the deformation of the spring. This deformation is determined optically. The measuring range of the Brookfield DVE viscometer depends on the rotation speed of the spindle, the size and shape of the spindle, the holder in which the spindle rotates and the full torque of the calibrated spring. Viscosity is expressed in the units milliRascal-second (mPa.s), or centipoise

(cP).

Preferably, the device is suitable for accurate dispensing of an adhesive component with a viscosity between 200 and 180000 cP, between 300 and 160000 cP, between 400 and 140000 cP, most preferably between 500 and 120000 cP. In a further or different embodiment, the first pump is configured in its coupled state, and the second pump, the coupling point and the static mixer are configured in their disconnected state, the distribution point downstream being coupled to the first outlet. In this configuration, the device allows dispensing of a one-component adhesive, whereby the rotary positive displacement pump allows the adhesive component to be accurately metered, leading to an excellent bonding result. The pumping of the adhesive component is less sensitive to fluctuating line pressure, the pumped adhesive component can be pumped in an extremely wide range of viscosities, and the pump flow rate is adjustable over a wide range. Due to the detachable nature of the first rotary positive displacement pump and the distribution point, cleaning of the equipment is very easy and it is possible to change easily between different types of adhesive. In a further or different embodiment, the first pump, the second pump, the coupling point and the static mixer are configured in their coupled state, the distribution point being downstream coupled to the static mixer. In this configuration, the device allows distributing a two-component adhesive, wherein a first adhesive component is pumped by the first pump and a second adhesive component is pumped by the second pump. Both adhesive components then come together at the coupling point, after which they are carefully mixed in the static mixer. Both pumps provide an extremely stable pump flow, ensuring an optimal mix of the adhesive components in the coupling point and the static mixer, resulting in an optimal bonding result. In addition, the disconnectable configuration allows one or two adhesive components to be replaced quickly and efficiently with another type, after which bonding can be resumed quickly.

Preferably, the device comprises a first and a second motor, where the first rotary positive displacement pump is driven by the first motor, and where the second rotary positive displacement pump is driven by the second motor. In particular, if several adhesive components of different viscosity are to be pumped, separate motorization of the first and second pumps is advantageous in order to obtain accurate dispensing and good mixing. In addition, the presence of two different, rotary positive displacement pumps allows the adhesive components to be pumped at a different flow rate. This allows the glue components to be metered in asymmetrical proportions. In some embodiments, the device allows the first and second adhesive components to be dispensed in a ratio between 1 : 10 and 10: 1. Such ratio is for example 2: 1 , 3:1 or 4: 1 . In some embodiments, the first and/or second rotary positive displacement pump comprises a single rotary element. The operation of the positive displacement rotary pump described herein comprising a single rotary element allows, in particular, the displacement of a precisely defined volume of an adhesive component through the pump. The single rotary element hereby comprises one or more cavities, and fits precisely into the pump housing. This ensures that each cavity forms a discrete bolus that is constrained by the rigid walls of the pump housing. Thus, as each bolus is formed under rotation of the rotating element, a vacuum is created on the inlet side, which draws an adhesive component into the bolus. Each bolus filled with glue component is then moved to the outlet side by the rotating element. In order to prevent counterflow from the outlet side to the inlet side, and to allow for a smooth flow of the adhesive component, such a pump typically incorporates a spring-loaded diaphragm. In this case, each rotation of the single rotary element in the pump housing results in the displacement of a fixed volume of adhesive component. This is extremely advantageous as it allows very precise dispensing of a first and second adhesive component when applying a two-component adhesive. Whereas other types of pumps require a volume meter for accurate glue dispensing, the use of a rotary positive displacement pump with a single rotary element allows the volume to be set correctly, making it unnecessary to check and/or measure the volume actually dosed. The pump flow rate is also exceptionally stable, showing little or no fluctuation. The positive displacement pump containing a single rotary element also makes it virtually impossible for air to be sucked into the adhesive component, and minimizes the influence of temperature, pressure and fluid viscosity on pump accuracy.

Preferably, the first and second rotary positive displacement pumps are driven by a stepper motor or a DC motor. The setting of the rotational speed thus determines the pump flow rate and the number of rotations or revolutions determines the applied dose. The operating speed of the pumps can therefore be unambiguously determined and set by a user in order to obtain a correct pump flow rate and applied dose.

The static mixer is, according to some implementations, a flexible, static mixer. This allows a variety of mixers, i.e. of different types or different dimensions to be used in the same, compact space of the device. In particular, this contributes to a very versatile device, compatible with a large variety of adhesives and/or adhesive components. Compact equipment and high versatility contribute to increased ease of use, without sacrificing mixing and/or gluing quality.

The carrier includes, in a further or different embodiment, one or more attachment points for fixing the dispensing points. The dispensing points may be fixed according to a specific configuration, or the configuration may be changed depending on the intended application. This ensures an even dosage of the adhesive in a wide range of situations. In some embodiments, the attaching points are adjustable in height and/or width. Here, the configuration of the dispensing points can easily be changed in function of the intended application. A possible application is the bonding of roofing on a flat roof. Preferably, the attaching points are positioned at equal distances from each other on the carrier.

In some embodiments, the carrier is equipped with one or more hinged doors, behind which the dispensing points and the adhesive component reservoirs are located. The device is so discrete and convenient to use that the adhesive component reservoirs are stored safely during use, and are not exposed to light or extreme temperature variations.

According to a further or different embodiment, the carrier comprises one or more mounting points for mounting a first and second adhesive component reservoir, which first and second adhesive component reservoirs are respectively coupled to the first and second inlets of the first and second pumps. Suitable adhesive component reservoirs are, in particular, adhesive bags or boxes. The provision of mounting points allows for different reservoir dimensions to be handled. The adhesive component reservoirs should preferably be glue bags.

In some embodiments, the carrier is a cart, which cart comprises at least two swivel wheels. In some embodiments, two wheels of the cart are fitted with brakes. In this way, the cart can be safely left behind during periods of unconstraint.

Alternatively, the carrier is a hand-, shoulder-, or back-mounted frame. In this case, the dispensing points extend from the carrier to a surface to be bonded. In some implementations, the dispensing points are supported by a secondary support frame, equipped with one or more wheels.

Preferably, the cart comprises a handle, wherein the handle and the dispensing points are located at the same end of the cart. More preferably, the handle is extendable in its spring direction. Still more preferably, the handle for this purpose comprises an extendable element extending laterally from the cart.

In some embodiments, the dispensing points are equipped with a membrane and/or mechanical seal at their ends. This makes it possible to interrupt the bonding process without exposing the adhesive in the dispensing points to ambient air or moisture. When bonding is resumed, optimum quality remains guaranteed.

In some embodiments, the dispensing points and/or the attachment points to which the dispensing points are connected are tillable and/or bendable. This allows the orientation of the dispensing points to be changed such that the opening of the dispensing points through which the adhesive and/or adhesive component leaves the dispensing points is directed respectively towards, or away from, the surface to be bonded. Preferably, the dispensing points and/or the attachment points are hinged to the trolley for this purpose.

According to some or other embodiments, the device comprises one or more heating elements which allow the viscosity of the adhesive and/or adhesive components to be regulated as a function of the ambient temperature. This is particularly advantageous when bonding materials in cold conditions, for example when bonding a roof surface in cold weather. Said heating elements may be located immediately upstream and/or downstream of the pumps, immediately upstream and/or downstream of the static mixer, or a combination thereof. In some embodiments, the device includes an insulating cover which is located around the first and/or second adhesive component reservoir. This is particularly advantageous when bonding materials in cold and/or hot conditions, in order to be able to maintain the anticipated adhesive components within a desired temperature range.

In some embodiments, the device includes an identification device which allows identification of the adhesive components, whereby the device adjusts and/or suggests one or more parameters for use of the device with the specific adhesive components used. These parameters may include the choice of static mixer, the flow rate and/or the speed of the pumps, etc. Said identification device may be a barcode and/or QR code scanner.

According to a further or different embodiment, the device includes a user interface, which user interface allows the various controllable parameters described herein to be set. Such controllable parameters include the speed and/or flow of the first and/or second pump, the temperature of possible heating elements, or combinations thereof.

A third aspect of the present invention relates to a kit of a device according to one of the preceding embodiments from the first or second aspect and one or two adhesive component reservoirs. The kit as described herein is easy to use and lends all of the previously discussed advantages in a ready-to-use package. In some embodiments, the kit includes one or more static mixers specifically suited for the adhesive components present in the reservoirs, and/or includes instructions for setting the speed and/or flow rate of the pumps. In some embodiments, the instructions are presented and/or executed by the device by means of scanning a barcode and/or QR code. Said code is present on the adhesive component reservoirs in some embodiments.

In a fourth aspect, the present invention relates to a method for mixing and/or dispensing a one- or two-component adhesive by means of a device as described in the first aspect, comprising the steps: (a) selecting one or two suitable adhesive components, (b) providing the selected adhesive components in the device at the level of first and second inlets respectively, (c) optionally, setting a suitable pump flow rate for the first and second pumps respectively, (d) mixing the selected adhesive components at the level of the static mixer, by commissioning the device, and (e) dispensing the one- or two-component adhesive on a substrate to be bonded, at the level of the dispensing points. The working method as described herein lends itself to all the previously discussed advantages. In a further or different embodiment, the method also includes the selection of a suitable static mixer according to the selected adhesive components.

According to some embodiments, dispensing the one- or two-component adhesive comprises propelling the device over the surface to be bonded. According to some embodiments, said dispensing comprises moving a cart according to the present invention.

A fifth aspect relates to a method for mixing and/or dispensing a one- or two- component adhesive by means of a device according to the second aspect, comprising the steps: (a) selecting one or two suitable adhesive components, (b) selecting and then coupling the first rotary positive displacement pump, the second rotary positive displacement pump, the coupling point, the static mixer, the distribution point, or combinations thereof, (c) the setting of a suitable pump flow rate for the first and/or second pump respectively, (d) the mixing and/or dispensing of the selected adhesive components by commissioning the device, and (e) the application of the one- or two-component adhesive on a substrate to be bonded, at the dispensing points.

In a further or different embodiment, the method also includes the selection of a suitable static mixer according to the selected adhesive components.

According to some embodiments, dispensing the one- or two-component adhesive comprises propelling the device over the surface to be bonded. According to some embodiments, said dispensing comprises moving a cart according to the present invention.

The present method allows for a great deal of flexibility, as both one-component and two-component adhesives can be bonded together with only minor adjustments to the configuration of the present device.

I n what follows, the invention is described by means of non-limiting figures illustrating the invention, which are not intended or should be interpreted as limiting the scope of the invention.

FI GURE DESCRI PTI ON

Fig. 1 shows a schematic representation of an embodiment of a device according to the present invention. The device as shown herein comprises a first pump 2, a second pump 3, a coupling point 4, a static mixer 5, a distribution point 6, which distribution point extends to two dispensing points 1 1 . The first pump comprises a first inlet 7 and a first outlet 8, said first pump 2 being suitable for pumping a first adhesive component from the first inlet 7 to the first outlet 8. The first adhesive component is supplied at the first inlet 7 by a first adhesive component reservoir 16. The second pump 3 is also provided with a second inlet 9 and a second outlet 10, wherein said second pump 3 is suitable for pumping a second adhesive component from the second inlet 9 to the second outlet 10. The second adhesive component is provided at the level of the second inlet 9 by means of a second adhesive component reservoir 17. The coupling point 4 connects herewith the first 8 and second outlet 10 originating respectively from the first 2 and second pump 3, and is thus suitable for bringing together the first and second adhesive components. Downstream of the coupling point 4 is said static mixer 5, which carefully mixes the first and second adhesive components. The type and/or dimensions of the static mixer 5 can be selected according to the adhesive components to be mixed. Due to the construction of the present device, a minimum distance between the pumps 2 and 3, and the static mixer 5 is realized, as a result of which the cooperation and compatibility between the pumps 2 and 3, the mixer 5 and the adhesive components can be quickly and efficiently evaluated and optimized. Downstream of the static mixer 5 is the distribution point coupled 6, giving rise to said dispensing points 11 . The device as described herein mixes the first and second adhesive components immediately after pumping, which provides several advantages with respect to the bonding result, as well as advantages with respect to operating efficiency and ease of use. The first 2 and second pumps 3 are peristaltic pumps, whereby the first 7 and second inlet 9, and the first 8 and second outlet 10, pass through the peristaltic pumps 2 and 3, forming a fluid tube. The resulting closed tubular system ensures that the adhesive or adhesive component only comes into contact with the interior of the fluid hose, and not with ambient air or moisture, which contributes to a qualitative downstream mixing and ultimately an excellent bonding result. The first and second pumps as used herein may alternatively be rotary positive displacement pumps, which however allow a constant flow rate and good volume control. As a result, the adhesive components can be accurately dispensed and the bonding result is optimal.

Fig. 2 shows a schematic representation of an embodiment of a device according to the present invention. The device as shown herein also comprises a first pump 2, a second pump 3, a coupling point 4, a static mixer 5, and a distribution point 6. Downstream, however, the device comprises two additional distribution points 6, whereby a final split to 4 dispensing points 11 is obtained. The structure relating to the first 7 and second inlet 9, and the first 8 and second outlet 10, as well as the connection of the first 16 and second adhesive component reservoir 17 are retained. The coupling point 4 connects the first 8 and second outlet 10 originating respectively from the first 2 and second pump 3, to which downstream said static mixer 5 is coupled. By constructing the present device, a minimum distance between the pumps 2 and 3, and the static mixer 5 is achieved, which allows the cooperation and compatibility between the pumps 2 and 3, the mixer 5 and the adhesive components to be evaluated and optimized quickly and efficiently. Downstream of the static mixer 5, the distribution point 6 is coupled, which distributes to two parallel, additional distribution points 6, each of which distributes to two dispensing points 11 .

Fig. 3 shows a schematic representation of an embodiment of a device according to the present invention. The device as shown herein also comprises a first pump 2, a second pump 3, a coupling point 4, a static mixer 5, and a distribution point 6. However, a pressure vessel 12 is present between the first 2 and second pump 3, respectively, and the coupling point 4. The construction regarding the first 7 and second inlet 9 , and the first 8 and second outlet 10 , as well as the connection of the first 16 and second adhesive component reservoir 17 is retained. The coupling point 4 connects the first 8 and second outlet 10 originating respectively from the first 2 and second pump 3, to which downstream said static mixer 5 is connected. By constructing the present device, a minimum distance between the pumps 2 and 3, and the static mixer 5 Is achieved, which allows the cooperation and compatibility between the pumps 2 and 3, the mixer 5 and the adhesive components to be evaluated and optimized quickly and efficiently. Downstream of the static mixer 5, the distribution point 6 is connected, which gives out to two parallel, additional distribution points 6, each of which gives out to two dispensing points 11 . The pressure vessels 12 are filled with a gas or gas mixture which is able to compensate for fluctuations in pressure and/or flow rate from the pumps 2 and 3, thereby providing a constant downstream flow rate of the adhesive and/or adhesive components. The levelling out of such fluctuations, immediately downstream of pumps 2 and 3 and upstream of the static mixer 5, contributes to improved mixing quality, a more constant output flow rate at the dispensing points 11 , and ultimately also to improved gluing results, improved consumption efficiency and ease of use.

Fig. 4 shows a schematic representation of an embodiment of a device according to the present invention. The device as shown herein also comprises a first pump 2, a second pump 3, a coupling point 4, and a distribution point 6. A pressure vessel 12 is provided between the first 2 and second pump 3, respectively, and the coupling point 4. However, the device comprises two static mixers 5', both of which are coupled downstream of the coupling point 4. The construction regarding the first 7 and second inlet 9, and the first 8 and second outlet 10, as well as the connection of the first 16 and second adhesive component reservoir 17 is retained. The coupling point 4 connects the first 8 and second outlet 10 originating respectively from the first 2 and second pump 3, to which downstream said static mixers 5' are connected. By constructing the present device, a minimum distance between the pumps 2 and 3, and the static mixers 5 is achieved, allowing the cooperation and compatibility between the pumps 2 and 3, the mixers 5' and the adhesive components to be evaluated and optimized quickly and efficiently. Downstream of the static mixers 5' there is each a distribution point 6, which discharges to two dispensing points 11 . In total, a device with 4 dispensing points 11 is thus created. The presence of two static mixers 5' allows the throughput of the adhesive and/or adhesive components to be increased, and adhesive and/or adhesive components with a higher viscosity to be used. In addition, the use of two static mixers 5' eliminates one distribution point, as a result of which the device as a whole can be designed more compactly.

Fig. 5a shows a schematic representation of an embodiment of a device according to the present invention. The construction of the device is substantially the same as that of the device according to Fig. 3, except for the presence of a closable bypass connection 13. The closable bypass connection 13 connects the first pump 2 and the dispensing point 6, so that the present device can be used not only for two- component adhesive, but also for adhesive consisting of only one adhesive component. In doing so, the first pump 2 and the distribution point 6 are brought into direct contact with each other, with the section comprising the coupling point 4 and the static mixer 5 being taken out of service. The bypass connection 13 in particular allows adhesives with generally higher viscosity to be applied to a substrate using the same device. The bypass connection 13 can be opened or closed by means of the control point 20. Alternatively, two bypass connections 13 may be provided, connecting both the first 2 and the second pump 3 to the distribution point 6, as shown in Fig. 5b.

Fig. 6 shows a perspective view of an embodiment of a device according to the present invention. This embodiment relates to a device in which the carrier is a cart 1 . The device comprises a first pump 2, a second pump 3, a coupling point 4, a static mixer 5, and a distribution point 6. The construction regarding the first 7 and second inlet 9, and the first 8 and second outlet 10, as well as the connection of the first 16 and second adhesive component reservoir 17 is retained. Mounting points 15 for mounting the first 16 and second adhesive component reservoir 17 are provided on the cart 1 . The coupling point 4 connects the first 8 and second outlet 10 coming from the first 2 and second pumps 3 respectively, to which downstream said static mixer 5 is coupled. Due to the construction of the present device, a minimum distance between the pumps 2 and 3, and the static mixer 5 is achieved, which allows the cooperation and compatibility between the pumps 2 and 3, the mixer 5 and the adhesive components to be evaluated and optimized quickly and efficiently. Downstream of the static mixer 5, the distribution point 6 is connected, which gives out to two parallel, additional distribution points 6, each of which gives out to two dispensing points 11 . The dispensing points 11 are attached to the cart 1 at the level of the attaching points 14. The cart 1 includes at least two swivel wheels 18, which allow the device to be moved easily over a surface, for example a roof surface, where the user does not have to carry the device and can thus handle it ergonomically. The swivel wheels 18 allow flexible movement of the cart 1 over the surface, whereby the cart 1 can be accurately positioned and steered. Optionally, two wheels may be fitted with a brake. The cart 1 includes a handle 19, whereby the handle 19 and the dispensing points 11 are located at the same end of the cart 1 . This specific orientation is particularly advantageous in view of the intended bonding result, user efficiency, ease of use and user safety. In particular, the user can observe the bonding result at any time, thereby guaranteeing quality and reducing the risk of stepping into the adhesive already applied. The handle 19 can be extended in its spring direction, which allows the user to push the cart 1 and to step next to the cart 1 . The risk of stepping into the already applied adhesive is hereby further reduced.

Figs. 7, 8 and 9 show respectively a front, side and perspective view of an embodiment of a device according to the present invention. The device as shown herein comprises a first pump 2, a second pump 3, a coupling point 4, a static mixer 5, and a distribution point 6. Between the first 2 and second pumps 3, respectively, and the coupling point 4 is a pressure vessel 12, coupled through the control point 20. Upstream and downstream of the first 2 and second pumps 3 are a first 7 and second inlet 9, respectively, a first 8 and second outlet 10. Connected to these inlets are a first 16 and second adhesive component reservoir 17, which are suspended from the mounting points 15. The coupling point 4 connects the first 8 and second outlet 10 originating from the first 2 and second pumps 3, respectively, to which the said static mixer 5 is connected downstream. By constructing the present device, a minimum distance between the pumps 2 and 3, and the static mixer 5 is achieved, which allows the cooperation and compatibility between the pumps 2 and 3, the mixer 5 and the adhesive components to be evaluated and optimized quickly and efficiently. Downstream of the static mixer 5 is coupled the distribution point 6, which distributes to two dispensing points 11. The device as shown herein comprises a handle 19, which is ergonomically manageable by a user as can be seen from Fig. 9. Further, the cart 1 includes two swivel wheels 18 and two wheels 21 , optionally equipped with a braking system. Further, the cart 1 includes a user interface 22 which allows the speed and/or flow rate of the first 2 and second pumps 3 to be set according to the adhesive components being used.

Fig. 10a shows a perspective view of an embodiment of a device according to the present invention. This embodiment relates to a device in which the carrier is a cart 1 . The device includes a motor 23, and allows the coupling of a hose set as shown in Fig. 10b. The hose set shown includes a rotary positive displacement pump 2, with an inlet 7 and an outlet 8, which inlet 7 allows the connection of a first adhesive component reservoir 16. A corresponding adhesive component reservoir is shown in Fig. 11 and concerns a glue bag. Downstream of the outlet 8, the dispensing point 6 is coupled, which dispensing point 6 gives rise to two parallel dispensing points 11 .

The cart 1 comprises a swivel wheels 18, and two fixed wheels 21 which allow the device to be moved easily over a surface, for example a roof surface, whereby the user does not have to carry the device and can thus handle it ergonomically. The swivel wheels 18 allows flexible movement of the cart 1 over the surface, whereby the cart 1 can be accurately positioned and steered. Optionally, two wheels are provided with a brake. The cart 1 includes a handle 19. The adhesive component reservoir 16 shown herein is a glue bag which includes an opening 24 for connecting the inlet 7, and includes a cap 25 which allows the glue bag to be closed. However, it can be seen from Fig. 10a that the cart includes a hinged door 26 for discreetly storing the adhesive component reservoir 16. Also, mounting points 15 for hanging the adhesive component reservoir 16 on the cart 1 are provided, whereby the adhesive component reservoir 16 includes complementary suspension points 27 for hanging it.