The invention concerns an egg processing system.

Egg processing systems, including egg weighing devices, are known from the prior art. In a known system, the egg weighing device is installed in an egg transporting track, to weigh an egg carrying track section each time an egg passes that section. A disadvantage of known configurations is accumulation of contaminants (e.g. sticky egg liquid) near/at the weighing device transport section, which contaminants can be passed along by one or more of the eggs to be processed. As a result, desired accurate egg weighing measurements can be difficult to obtain. It is known to manually wash the entire egg transporting track after a certain operational period however, it has been found that this does not always remedy the egg weighing problem, whereas such washing operations can lead to undesired long system downtimes.

KR200357183 and CN202799874 concern egg sorter systems having an egg weighing bridge. CN104396798 discloses a rolling type egg weighing device which comprises an oblique guide rail, a horizontal guide rail, a weighing bracket, at least one weighing sensor, and a plurality of weighing delivery rods.

The present invention aims to solve the above-mentioned problems. In particular, the invention aims to provide an improved, reliable egg processing system, wherein relatively large numbers of eggs can be measured (in particularly weighed) accurately and wherein long system uptimes can be obtained.

According to the invention, this is achieved by the features of claim 1.

Advantageously, there is provided an egg processing system including a transport structure configured for supporting eggs along a transport direction T, wherein the transport structure includes at least two neighboring sections separated by at least one slit, one of the at least two sections being part of an egg weighing device, wherein the system includes cleaning means for cleaning said slit.

It has been found that in this way, dirt or other contamination (e.g. being conveyed by passing eggs) that is accumulated in said slit, can be efficiently removed by said dedicated cleaning means. As a result, reliable operation of the egg weighing device can be achieved so that accurate measurement results (of egg weights) can be obtained. Besides, long system downtimes can be avoided or reduced. It is preferred that the (dedicated) cleaning means are configured for cleaning said slit only, without cleaning other system components (e.g. without upper surfaces of cleaning nearby transport structure sections).

In particular, a basic idea of the invention is that an egg supporting transport section of an egg weighing device can be mechanically separated from a neighboring (e.g. upstream) egg transport section by a relatively small slit, allowing weighing operation independent of that neighboring transport section. By providing a dedicated slit cleaning means, which can be operated or active during a dedicated, relatively short, slit cleaning step (preferably when no egg passes the slit), accumulation of dirt in the slit can be prevented or at least significantly reduced. As a result, a good mechanical separation between the weighing transport section and the neighboring egg transporting section can be upheld so that accurate weight measurements can be carried out, during relatively long overall system uptimes.

Good results can be achieved in case at least one of the at least two sections is movably arranged with respect to the neighboring section, such that the respective section can be moved to act as the cleaning means during a cleaning mode of the system, wherein the system is configured to block movement of the movable cleaning section during a normal egg processing mode of the system. Alternatively or additionally, the cleaning means include a cleaning device configured to be moved into and out of said slit during a cleaning mode of the system. In particular, in this way, cleaning can be achieved mechanically, which can lead to reliable and swift declogging of the slit

Also, the invention provides a method according to the features of claim 10.

The method can for example utilize a system according to the invention, and is characterized by:

-guiding a number of eggs on a transport structure, configured for supporting eggs, in a transport direction, along at least two neighboring sections separated by at least one slit, one of the at least two sections being part of an egg weighing device, the egg weighing device performing an egg weighing operation when the respective section of the transport structure carries an egg;

-a slit cleaning step, including activating cleaning means, to clean said slit, for example after a number of eggs has passed the slit.

In this way, above-mentioned advantages can be achieved.

In the following, the invention will be explained with reference to the drawings, which show non-limiting examples.

Figure 1 schematically shows a perspective view of a first embodiment of an egg processing system;

Figure 2 shows a side view of the example of Fig. 1;

Figure 3 A shows a top view of the example of Fig 1, wherein the cleaning means are in a first position;

Figure 3B is similar to Fig. 3A, showing a second position of the cleaning means;

Figure 4 shows a detail Q of Fig. 2;

Figure 5A is similar to Fig. 2, showing a second embodiment of an egg processing system; Figure 5B depicts a top view of the second embodiment wherein the cleaning means are in a first position;

Figure 5C depicts a top view of the second embodiment wherein the cleaning means are in a second position;

Figure 6A is similar to Fig. 2, showing a third embodiment of an egg processing system;

Figure 6B shows the third embodiment after rotation of the cleaning means;

Figure 7 A is similar to Fig. 2, showing a fourth embodiment of an egg processing system, in an egg processing state;

Figure 7B shows the fourth embodiment during a slit cleaning step;

Figure 8A shows a bottom view of a fifth embodiment of an egg processing system; and

Figure 8B shows the fifth embodiment during activation of the slit cleaning means.

Similar or corresponding features are denoted by similar or corresponding reference signs in this application.

Figures 1-4 show an example of an egg processing system. The system includes a transport structure 1 configured for supporting (and guiding) eggs E along a transport direction T (which can be substantially or mainly parallel to a horizontal direction X).

The egg transport structure 1 as such can be configured in various ways. According to an example, the transport structure can include at least two neighboring sections, for example a first section la and a downstream second section lb, separated by a respective slit 2 (i.e. a gap, particularly an air gap). The second one of the at least two sections lb can be part of (or provide) an egg weighing device 5. For example, the egg weighing device 5 can support the respective section lb, or be integrated there-with. For example, the system can include transport means similar to an egg weighing device used in the Forta GT100 system of Moba, as shown in www. youtube. com/watch?v=vdof3XgpCzM.

According to an embodiment, the transport structure can include at least three neighboring sections, for example a first section la and a second (intermediate) section lb and a downstream third section 1c, separated by respective slits 2, wherein the middle (second) section lb can be part of (or provide) the egg weighing device 5. Optionally, there can be provided one or more further downstream fourth sections Id of the transport structure Id. Also, optionally, there can be provided one or more further upstream fifth sections of the transport structure le.

Each of the neighboring sections la, lb, 1c, Id, le of the transport structure can be configured in various ways. In particular, the neighboring sections la, lb, 1c, Id, le can be configured to carry and guide eggs E along a respective transport direction T. According to an embodiment, the transport can be effected by gravity (i.e. without a conveyor or drive mechanism), wherein the eggs E can roll (freely and/or guided) from an initial vertical level over support surfaces/edges 4a, 4b, 4c, 4d, 4e of the neighboring sections la, lb, 1c, Id, le to a second vertical level that is lower than the initial vertical level (see Fig. 1), such that the rolling eggs E pass the weighing device 5. Each of the neighboring sections la, lb, 1c, Id, le of the transport structure can e.g. be configured or shaped as an egg guide, providing upper guiding surfaces/edges for directly supporting and guiding the eggs E along the transport direction T, towards and along (and preferably away from) the weighing device 5. Thus, during use, the eggs E can be transferred from one of the sections to the -neighboring- other (viewed along the transport direction).

For example, at least one section lb, le of the transport structure can be a downwardly sloped section, e.g. providing a respective sloped egg guiding path that include an angle B larger than zero with a horizontal plane (XY), for example an angle B in the range of 0-30 degrees. The transport section lb that is part of the egg weighing device 5 can e.g. define a respective local horizontal egg transport path (see Fig. 1, 2), but that is not required as it may be a sloped path as well.

Similarly, one or more sections 1c, Id (if any) of the transport structure located downstream of the second section lb can provide respective horizontal egg supporting surfaces, but that is not required.

Optionally, the transport structure includes additional egg guiding members (not shown) travelling along the transport direction T, to define a certain egg travelling speed along a or each downwardly sloped track section le, lb (to avoid that a travelling speed of downwardly rolling eggs keeps increasing due to gravity). As will be appreciated by the skilled person, such an additional egg guiding member can extend into the path of the downwardly rolling egg E , such the guiding member guides the downwardly rolling egg E along the support section le, lb at a certain (e.g. constant or predefined) speed. It is preferred that an array of additional spaced-apart egg guiding members is provided, for guiding a plurality of eggs E, spaced- apart from each other, over the sloped support section le, lb.

For example, each of the transport sections la, lb, 1c, Id, le can include two parallel, spaced-apart, egg supporting guides 3a, 3b, 3c, 3d, 3e, defining an egg guiding track along said transport direction T, wherein a said slit 2 is defined between the opposite ends (in particular opposite butt ends) of opposite guides 3a, 3b, 3c, 3d, 3e of respective neighboring sections la, lb, 1c. Each of the parallel supporting guides can e.g. be an elongated plate or strip or rod or guide rail, e.g. made of steel or a different material. The two parallel egg supporting guides of a transport section e.g. can define spaced-apart parallel upper (i.e. upwardly facing) egg guiding edges 4a, 4b, 4c, 4d, 4e, arranged for directly supporting and guiding eggs E (the eggs E preferably rolling over those guiding edges 4a, 4b, 4c, 4d, 4e during operation) in the transport direction T, along the track. Egg movement along the track, defined by the transport structure 1, can include a rolling movement of the egg E over the track, and/or a sliding movement of the egg E. During such movement the egg E can directly contact a generally stationary guiding surface, e.g. provided by said parallel upper egg guiding edges 4a, 4b, 4c, 4d, 4e, of the transport structure 1 (i.e. the relevant part of transport structure 1 as such does not move along the transport direction T for moving the egg in that direction T). In case of implementation of said additional guiding members, traveling at a certain speed along a downwardly sloped track section, the eggs (in particular their downstream sides) can also be contacted by such guiding members during movement along the respective track section(s).

One or more of the sections 1, la, lb, 1c, Id, le can also be configured differently, e.g. by including elongated egg guiding channels or throughs, configured for directly supporting and guiding rolling and/or sliding eggs E along the transport direction.

In particular, a slit 2 between two neighboring sections la, lb, 1c can mechanically decouple the sections la, lb, 1c so that the weighing device 5 can weigh the second section lb, and well as any egg E carried on or transported over the second section lb. For example, a width W of the slit 2 (measured along the transport direction T) can be smaller than a width or diameter of eggs E to be transported, the slit width W for example being at least 1 mm, for example being in the range of 1-30 mm, and preferably a range of 1-8 mm.

As will be appreciated by the skilled person, the weighing device 5 as such can be configured in various ways, e.g. including a pressure sensor or load cell or scale, connected to or integrated in the respective egg weighing transport section lb. According to an example, a weight of an egg E carried on/by the second section lb of the transport structure 1 may lead to a (small) vertical downward displacement of that second section lb, the displacement being sensed, and e.g. countered (e.g. via spring force), by the weighing device 5. Such a weighing related vertical displacement is generally significantly smaller than said sht width W, e.g. a vertical weighing displacement smaller than 1 mm. After such weighing, the second section lb of the transport structure can return in upward direction Z to an initial position (the returning action e.g. being effected by the weighing device 5), i.e. after the measured egg E has rolled away from that the second section, e.g. onto a subsequent third section 1c (if any) of the transport structure 1. The weighing device 5 can be configured to generate a weighing result or signal, e.g. an electric or electronic or optical signal, providing a respective measurement result (the result being indicative of a weight or mass of an egg E that passes or has passed the respective transport section lb, as will be clear to the skilled person), which signal can be processed e.g. by or controller or processing means (not depicted) such as egg sorting or classifying means or the-like.

According to a preferred embodiment, the transport structure 1 is configured such that a number of eggs E can be guided along the weighing device 5 one after the other, such that the weighing device 5 can provide individual detection results concerning each of the eggs E.

As is depicted in Figure 4, a said slit 2 extending between a second transport section lb and an or each neighboring transport section la, 1c can be contaminated, e.g. at least partly filled/clogged, by contamination K. Such contamination may hamper proper operation of the weighing device 5 since it can mechanically link between the two (or three) transport sections la, lb (la, lb, 1c).

Advantageously, the system includes cleaning means la, 1c for cleaning an aforementioned slit 2 (and preferably only the slit 2, without cleaning e.g. egg supporting surfaces of said transport sections la, lb, 1c). It is preferred that the cleaning means la can be activated (e.g. by a dedicated cleaning means controller 7), for removing clogging material K from the slit 2, or at least breaking such material K (the cleaning means can also be called declogging means). In this way, the problems concerning slit contamination/clogging can be resolved or at least significantly alleviated, allowing proper operation of the weighing device 5. The cleaning means can be configured in various ways.

At least one la, 1c of the at least two neighboring egg transport sections la, lb, 1c can for example be movably arranged with respect to the neighboring section lb, such that the respective movable section la, 1c can be displaced to act as the cleaning means (in particular during a cleaning mode of the system). Preferably, the system is configured to block movement of a movable cleaning section la, 1c during a normal egg processing mode of the system (i.e. to retain that section la, 1c in a respective egg guiding position with respect to a neighboring second transport section lb). For example, both an upstream section la and a downstream section 1c of transport structure can act as a slit cleaning section, movably arranged with respect to an intermediate weighing section lb, for declogging corresponding slits 2. Alternatively or additionally, the intermediate weighing section lb can be movable arranged with respect to a neighboring transport section la, 1c (see Figures 5A, 5B, 5C) to provide slit cleaning.

It is preferred that a movable slit cleaning section la, 1c is movable over a relatively large distance with respect to the neighboring transport section lb, e.g. between an initial position (see Figure 3A) defining the slit 2 with the neighboring section lb, and a second position (see Figure 3B) wherein that slit 2 is significantly widened with respect to its initial operational width W (for example by a factor of at least two, and preferably a factor of at least five) or wherein that slit is not present anymore. Movement of the moveable transport section(s) is indicated by arrows R in the drawings. According to an embodiment, the or each movable cleaning section la, 1c can be movable over a distance of more than 1 mm, for example at least 1 cm during a cleaning mode of the system. For example, egg guides 3a, 3c of a movable cleaning section la, 1c can substantially align with corresponding egg guides 3b of the neighboring transport section lb (providing a substantially continuous egg transport path) when the cleaning section is in its initial position, wherein egg guides 3a, 3c of that movable cleaning section la, 1c misalign with corresponding egg guides 3b of the neighboring transport section lb when that movable section la, 1c has been moved to its second (slit declogging) position.

Movement of the or each movable slit cleaning section la, 1c can be a substantially horizontal movement/translation, for example a horizontal movement in a direction Y that is transversal to a general egg transport direction T (and respective first horizontal direction X), see Figures 1-4. For example, a movable cleaning section la, 1c can be movably held or guided by respective guide elements 8 (schematically depicted). According to an embodiment, the movement can involve iterative and/or vibrating movement of the movable slit cleaning section la, 1c, between first and second positions, for improving slit cleaning results. Alternatively, a single movement action of the cleaning section la, 1c, from the first position to the second position and back, can be sufficient to provide good slit declogging.

According to an embodiment, the system can include one or more actuators 9 configured to move the cleaning section(s) la, 1c of the transport structure from a first (initial) position to a second position, and e.g. vice- versa, with respect to the neighboring section lb of the transport structure. The or each actuator 9 can e.g. include electric, hydraulic and/or pneumatic actuation means, a motor, piston/cylinder-type actuator, electromagnetic actuator, servo, or the-like, for example depending on the type of movement (translation and/or rotation), as will be appreciated by the skilled person.

According to an embodiment, the system can include a cleaning mode controller 7 (schematically depicted in Figure 1), configured to provide a slit cleaning mode of the system during which the cleaning means la, 1c are activated for cleaning said slit(s) 2. For example, the cleaning mode controller 7 can be configured to control the egg processing system to halt feeding eggs E to the transport structure 1, after which an or each actuator 9 can be controlled (by the controller 7) to move the respective cleaning section la, 1c between respective first and second positions, for declogging a respective neighboring slit 2.

Similarly, the cleaning mode controller 7 can be configured to control the system to end the cleaning mode after a certain cleaning period, by controlling the actuator (s) to move the cleaning section(s) la, 1c to their initial position(s), after which feeding eggs E to the transport structure 1 can be resumed by the system.

Alternatively, it can be preferred that the cleaning mode controller 7 can e.g. be configured to synchronize the cleaning mode with egg transport time intervals (or with egg locations on the track), in particular with time intervals of eggs passing the respective slit 2, such that a slit cleaning mode is active only when no egg E passes the slit 2, and such that no slit cleaning is applied when an egg E passes the slit 2. In this way, slit cleaning can be achieved without having to halt feeding eggs E to the transport structure 1.

Alternatively, it can be preferred that the cleaning mode controller 7 can e.g. be configured to automatically start the cleaning mode when the controller determines an idle state of the system, and/or when the controller determines that no eggs are being fed to the slit 2 during a certain time period (e.g. between batches of eggs to be processed). In that case, the cleaning mode controller 7 can e.g. be configured to stop the cleaning mode when the controller determines that the system is not idle anymore, and/or when the controller determines that eggs are being fed towards the slit 2 again.

The cleaning mode controller 7 can be or include an electronic unit, a microcontroller, computer, hardware and/or software, or the-like; the controller 7 can be configured to communicate with an actuator 9 for controlling actuator operation (and a corresponding cleaning section state) in various ways, e.g. via wired or wireless control signal paths (not shown), as will be clear to the skilled person.

Optionally, the cleaning mode controller 7 can be configured to periodically start a slit cleaning mode. Also, optionally, the cleaning mode controller 7 can be configured to start a slit cleaning mode after a predetermined number of eggs E has passed the weighing section lb of the transport structure (to that aim, the controller 7 can e.g. be configured to communicate with the weighing device 5 for counting passage of eggs E, or e.g. with a dedicated egg passage counter -not depicted- arranged along the track).

For example, also, the cleaning mode controller 7 can be configured to start a slit cleaning mode immediately after a single egg E (of a plurality of eggs transported by the system in the transport direction T) has passed the slit 2 or respective weighing section lb. Similarly, the cleaning mode controller 7 can be configured to timely stop the cleaning mode, in particular before a next egg E (of said plurality of eggs transported in the transport direction T) arrives at that slit 2, to prevent that the cleaning mode is still active when that next egg E passes the slit 2.

In particular, during operation, a plurality of eggs E can pass the slit 2, one after the other, spaced-apart, so that the eggs E can be weighted individually, such that no egg E will be present above the slit 2 at certain time intervals, during which time intervals a said cleaning mode can be active (i.e. activated by the controller 7).

According to an embodiment, a cleaning mode is carried out within a relatively small time period. For example, during the cleaning mode, the movable slit cleaning section la, 1c can be moved only a limited number of times between an initial position and a second (e.g. slit widening) position, for example only once. Optionally, the system can include one or more slit clogging sensors (not shown) arranged to detect slit clogging K, for example an optical sensor. In that case, the cleaning mode controller 7 can be configured to initiate a cleaning mode based on a slit clogging sensor detection result (e.g. when the sensor detects a certain threshold amount of contamination K being present in the slit 2).

According to an embodiment of the invention, which can include use of one or more of the afore-mentioned embodiments, there is provided a method for processing eggs E. The method includes:

-guiding a number of eggs on a transport structure 1, configured for supporting eggs E, in a transport direction T, along at least two neighboring sections la, lb, 1c separated by at least one slit 2, one of the at least two sections lb being part of an egg weighing device 5, the egg weighing device 5 performing an egg weighing operation when the respective section lb of the transport structure carries one egg E; and

-a slit cleaning step, including activating cleaning means la, 1c to clean said slit 2, for example after a number of eggs E has passed the slit 2.

As follows from the above, the egg guiding can e.g. involve the eggs rolling along a track that is provided by the neighboring sections of the transport structure.

For example, starting and ending the slit cleaning step can be initiated by an aforementioned cleaning mode controller 7. Also, transport of eggs E over the neighboring sections of the transport structure 1 is preferably halted during activation of the cleaning means la, 1c (so that the slit cleaning can be carried out safely, avoiding egg impact on a moving slit cleaning section of the transport structure).

The slit cleaning step preferably includes moving at least one la, 1c of the at least two sections la, lb, 1c of the transport structure 1, with respect to the neighboring section lb of the transport structure 1. As a result, slit clogging material K (if present) can be broken or removed, so that the slit 2 can remain open allowing proper operation of the egg weighing device 5 (associated with a said transport section lb).

It is preferred that the slit cleaning step is carried out swiftly, for example within a minute or even within a number of seconds (for example within 10 seconds, within 5 seconds, or within 1 second) so that system downtime can be kept at a minimum. As an example, the cleaning step can be carried out each time an egg E has passed the respective slit 2, or each time a specific, predefined, number of eggs E has passed the slit 2).

Figures 5A, 5B, 5C depict an embodiment that differs from the example of Figures 1-4 in that the weighing section 101b of the transport structure is movably arranged, between an initial egg guiding state (as shown in Figures 5A, 5B) for guiding and weighing passing eggs E, and a second (slit cleaning, i.e. dirt breaking) position as shown in Fig. 5C. The weighing section 101b can be located e.g. between two stationary egg guiding sections 101a, 101c of the transport structure, defining respective slits 102 therewith.

For example, the movable weighing section 101b can be movably held or guided by respective guide elements 108 (schematically depicted), and be connected to or provided with an actuator 109 to move the weighing section 101b during slit cleaning operation. As mentioned before, according to a preferred embodiment, the movement can involve iterative and/or vibrating movement of the movable transport (and weighing) section 101b, or a single movement action.

In Figures 5A, 5B, 5C, the movement of the weighing section 101b is directed transversally (substantially horizontally, as indicated by arrow R) with respect to the transport direction T.

In an alternative embodiment, a movable weighing section 101b can be movable, preferably by a respective actuator, in a substantially vertical direction for declogging an adjacent slit or slits 102. In that case the declogging movement is preferably such that the slit 102 is significantly widened with respect to its initial (operating) width W, for example by a factor of at least two, and preferably a factor of at least five, or such that the slit 102 is effectively not present anymore. In other words, the transport structure section 101b that is part of or associated with the egg weighing device 5 can be vertically movable over a relatively short (maximum) egg weighing distance during a normal egg processing mode of the system, e.g. less than 1 mm, wherein that section 101b is moved over a vertical distance that is (significantly) larger than the (maximum) egg weighing distance during a slit declogging step.

Operation of the example shown in Figures 5A, 5B, 5C can be substantially the same as operation of the first embodiment, a difference involving maintaining the nearby upstream and downstream transport sections 101a, 101c stationary during a slit cleaning (i.e. declogging) mode, and moving the weighing section 101b from an initial position to a second position (and back) in order to declogg or clean intermediate slits 102.

Alternatively or additionally, slit cleaning movement of a movable slit cleaning section 201a, 201c can be a rotational movement, for example a rotational movement about a rotation axis 215 extending transversally to the transport direction T (see Figures 6A, 6B). According to an embodiment, there can be provided a transport structure weighing section 201b associated with a weighing device 205, and one or two rotational transport section(s) 201a, 201c, and optional further upstream and/or downstream transport sections 20 Id, 20 le (analogue above-described embodiments). During egg processing, each rotational transport section 201a, 201c can be held in an initial position for transferring eggs via respective (upper) egg guiding edges to (and from) the weighing section 201b, along intermediate slits 202. During a cleaning mode of the system, the or each rotational transport section 201a, 201c can be rotated (for example in a single direction of rotation, as indicated by arrows R’) for increasing slit widths, or temporarily removing slit presence, allowing declogging. In an example, a rotational cleaning section 201a, 201c can have an angular (e.g. square or triangular or multi-angular) shape, when viewed in a side view, such that an outer contour of the a rotational transport section 201a, 201c can provide a plurality of egg supporting edges 204al, 204a2, 204a3 that can be aligned one after the other with egg supporting edges of the weighing section 201b, for transferring eggs thereto (and therefrom). For example, in case of a triangular shape, a rotation over 120 degrees (during a cleaning mode of the system) can provide slit declogging, whereas the rotation also involves replacing first egg guiding edges 204a 1 of the cleaning section (initially being aligned with egg supporting edges of the weighing section) by second egg guiding edges 204a2 of the cleaning section (taking over the egg transfer function from the first egg guiding edges).

Figures 7A, 7B show an example which differs from the embodiment of Figure 6 in that each a cleaning section 301a, 301c is an elongated section that is pivotal or swivable back and forth, in opposite directions or rotation R”, with respect to (horizontal) pivot axes 315. Figure 7A shows an initial, egg processing, state wherein egg supporting edges of the swivable cleaning section 301a, 301c are substantially aligned with egg supporting edges of an intermediate egg weighing section 301b (having a respective weighing device 305) of the system. Figure 7B shows the system during a slit cleaning mode, wherein the cleaning sections 301a, 301c have been pivoted away from the intermediate section 301b, to respective second positions, for declogging the adjoining slits 302. In this case, pivoting of a cleaning section 301a, 301c over a relatively small angle (e.g. an angle smaller than 45 degrees) can be sufficient to provide good slit cleansing.

Alternatively or additionally, according to an embodiment, good results can be achieved in case the cleaning means include one or more dedicated cleaning devices 410 (see e.g. Figures 8A, 8B) configured to be moved into and out of said slits 402 during a cleaning mode of the system. Such a cleaning device 410 can include a declogging element, for example a plate or spike-like element, arranged to enter the slits 402 between the butt ends of neighboring transport sections 401a, 401b (and 401b, 401c respectively) during a system cleaning mode. The cleaning device 410 can be associated with one or more actuators 409 (schematically depicted) for achieving the declogging movement of the device. Movement of the cleaning device 410 can involve horizontal translation, vertical translation, rotation, or a combination of such movements. For example, a cleaning device 410 can be held in a suspended position above an egg transport path, above and/or next to the transport structure, to be moved into the slit 402 by the respective actuator 409 during the slit declogging step. A limited number of cleaning movement of the declogging device 410, for example only one, can be sufficient to provide efficient declogging.

As an alternative, or in addition, for example, a dedicated cleaning device can include e.g. one or more spray means or nozzles, configured to clean the slit 2 using a fluid spray or fluid jet, in particular configured to direct such fluid to or into the slit 2 (preferably without directing the fluid to other system parts). The fluid can e.g. be water or air. In this way, the fluid can be used as a slit declogger.

The skilled person will appreciate that the invention is not limited by the described embodiments. It will be clear that the invention, as defined in the claims, can be achieved in various ways. Reference signs used in the present disclosore should not be construed as limiting the scope of the invention.

It will be clear that a slit declogging movement of a transport structure section or declogging device can include a combination of different types of movement, for example both translational and rotational or pivotal movements, in various directions. According to an embodiment (not shown), a rotational or pivotal transport structure section (providing a slit cleaning section) can be rotational with respect to a vertical axis of rotation, or an axis of rotation extending at an angle with respect to horizontal and vertical planes.

Further, the invention can be implemented for processing avian eggs, for example unfertilized (non-living) eggs, but that is not required.

Subsequent sections of the transport structure can be arranged substantially in parallel, or in mutually different directions. Also, one or more of the sections of the transport structure can define a respective straight (e.g. substantially horizontal) transport path, but that is not required.

Movement of a said transport section can involve various types of movement, for example iterative movements, vibrations, rotations, translations, a movement in a single direction or in various directions, and/or a combination of such and different movements.

Also, for example, at least one section lb, le of the transport structure can be a downwardly sloped section, e.g. providing a respective sloped egg guiding path (towards the slit ) that include an angle B larger than zero with a horizontal plane (XY), for example an angle 6 in the range of 0-30 degrees. Alternatively, a section that provides an egg guiding path towards the slit can be un upwardly sloped section, or a horizontal section.