Method and apparatus for delivering fluid droplets onto an open and stationary tray

Abstract

The invention relates to a method and a device for delivering small droplets of fluid onto an open tray holding poultry, said tray being stationary. According to the invention, the method comprises the steps of: (a) a movable arm is moved in translation over said tray in a first direction, said arm supporting a first set of dispensing nozzles and a second set of dispensing nozzles, said nozzles in each set being arranged to cover the entire dimensions of said tray in a second direction perpendicular to said first direction; (b) initially, dispensing small droplets of at least one first fluid by spraying using said first set of dispensing nozzles; (c) and then dispensing at least one second fluid different from said at least one first fluid to be sprayed by means of individual droplet ejection by means of said second set of dispensing nozzles.

Description

Technical Field

[0001] This invention relates to a method for uniformly delivering small droplets of different fluids onto poultry placed in an open and fixed tray.

[0002] The present invention also relates to an apparatus for applying small droplets of different fluids onto a fixed tray for carrying out this method. Background Technology

[0003] Animals from intensive feeding systems have become increasingly important in order to meet the growing demand for food.

[0004] Good health for these animals, especially in order to ensure adequate production, requires preventative and special vaccinations to immunize them against a variety of diseases during the first few days of their lives.

[0005] For example, when raising poultry, vaccines are usually administered to chicks that are one day old or between one (1) day old and five (5) days old.

[0006] To process large numbers of chicks simultaneously, it is known that these chicks, in trays or baskets moving on a conveyor belt, are exposed to fine droplets of water containing the vaccine to be administered, obtained by spraying. The direct contact between these chicks and the droplet mist ensures vaccination via the eye and nose.

[0007] It is also known to use a conveyor belt to pass these plates containing chicks under nozzles that spray droplets containing a vaccine gel. These droplets, upon contact, are stained with a color attractive to the chicks. This type of coloring also allows for assurance that the product has been properly ingested through a simple visual inspection of the inside of the animal's mouth.

[0008] Therefore, the droplets of gel that have landed on each chick's body will be placed nearby for other chicks to peck at, so that each chick receives a sufficient amount of vaccine.

[0009] Each of the fixed supports allows support for a set of nozzles used to deliver small droplets of a specific fluid into a dedicated processing area; these supports are arranged to be suspended over a conveyor belt that transports trays loaded with chicks.

[0010] Therefore, as the chicks wish to undergo different treatments, the trays carrying them are moved across different, spaced-apart treatment areas by means of a conveyor belt.

[0011] Therefore, it should be noted that devices equipped with this type of transport system that allow for large-scale vaccination of live animals are bulky and thus require extensive housing space.

[0012] Therefore, this type of device, used for large-scale vaccination of live animals, is not suitable for all types of operations, and is particularly unsuitable for small-scale breeding farms.

[0013] Therefore, there is an urgent need for equipment for the large-scale handling of live animals, whose original design allows for overcoming the shortcomings of the prior art disclosed above.

[0014] Purpose of the invention

[0015] This invention seeks to alleviate the shortcomings of the prior art by proposing a method and apparatus for large-scale processing of live animals that is simple, reliable, rapid in its design and in its mode of operation, and whose implementation requires minimal space.

[0016] Another object of the present invention is a method and apparatus of this type for the large-scale processing of live animals, thereby ensuring uniform processing of each live animal contained in an open tray or basket.

[0017] Another object of the present invention is a method of this type that minimizes the loss of processing fluids while ensuring a uniform and consistent distribution of these fluids on an open tray.

[0018] Another object of the present invention is to allow for methods and devices of this type to manage open trays of different sizes.

[0019] The present invention also seeks to use the method and the apparatus described to administer on a large scale two fluids selected from preventative or therapeutic substances, such as vaccines, nutrients, or even combinations of these elements. Summary of the Invention

[0020] For this purpose, the present invention relates to a method for delivering small droplets of fluid onto an open tray containing poultry, the tray being fixed. According to the invention,

[0021] a) A movable arm translates over the tray in a first direction, the arm carrying a first set of application nozzles and a second set of application nozzles, each set of nozzles being arranged to cover the entire dimension of the tray in a second direction perpendicular to the first direction.

[0022] b) First, small droplets of at least one fluid are applied by spraying using the first set of application nozzles.

[0023] c) Then, at least one second fluid, different from the at least one fluid to be sprayed, is dispensed by spraying individual droplets using a second set of dispensing nozzles.

[0024] "Birds" here refers to any species of birds, such as birds belonging to the class Aves. Feathered, winged of, feet, heat-absorbing (Hot-blooded) and able to Egg production of Spine Animals. In the context of this invention, poultry refers more particularly to poultry of economic and / or agronomic value, such as domestic fowl (e.g., chickens, turkeys, quails, partridges and pigeons), migratory birds (e.g., ducks and geese) and ornamental birds (e.g., swans, parrots and psittacines).

[0025] This type of injection device is suitable for use in areas where chicks are vaccinated within a few days after hatching, so between one (1) day old and five (5) days old, preferably one (1) day old or within 24 hours after hatching.

[0026] This method therefore allows at least two different fluids to be applied to chicks contained in an open tray or basket in a very short time, while still ensuring uniform treatment of each chick.

[0027] The original design of this method required minimizing its implementation space, and it is therefore particularly well-suited for implementation in small-scale operations.

[0028] Its advantages are reliability and economy.

[0029] Because this movable arm is advantageously height-adjustable, the method can be implemented with any type of open pallet. Width adjustment is achieved by removing, blocking by stops, or by not using certain nozzles and / or applicator tips located on the periphery of the movable arm.

[0030] Advantageously, this type of method is particularly suitable for the application of sprays (first fluid) and gels (second fluid).

[0031] According to a specific embodiment of this method for delivering small droplets of fluid onto an open tray, the movable arm moves at a constant or substantially constant speed while it is above the tray. By ensuring the continuity of the arm's movement, i.e., by moving the arm as regularly as possible above the open tray to be processed, uniform and consistent distribution of the small droplets of fluid is ensured for a given fluid flow rate at each set of dispensing nozzles.

[0032] Alternatively, the movable arm is driven by a drive unit containing an electric motor, and each fluid to be dispensed is drawn from a container holding the fluid by a syringe whose piston is electrically actuated. The acceleration or deceleration of this movable arm is controlled synchronously with changes in the fluid flow rate of each fluid to be dispensed, in order to ensure uniform distribution of the fluid on an open tray. Advantageously, this acceleration or deceleration is gradual. This type of embodiment allows for ensuring uniform distribution of small droplets of fluid on an open tray while minimizing the space required for implementing this method, and the acceleration or deceleration of the movable arm can be achieved directly above the open tray.

[0033] According to another specific embodiment of this method for delivering small droplets of fluid onto an open tray, steps b) and c) are performed as a movable arm passes over the tray in a single pass, with these nozzle groups arranged on the arm to create a time offset between steps b) and c). Preferably, this time offset or delay between steps b) and c) is determined to ensure effective treatment of poultry by each fluid, and in particular, the at least one second fluid. Thus, it is ensured that each poultry is directly exposed to the second fluid or consumes it in sufficient quantities so that large-scale treatment of the poultry is uniform. In other words, the time interval between steps b) and c) of fluid application is calculated to avoid the adhesion or wetting of droplets of the second fluid sprayed by the second set of application nozzles by reducing the small droplet mist obtained by applying the first fluid via the first set of application nozzles, especially when the second fluid is a gel. Alternatively, step b) is performed when the arm moves from the first edge of the tray to the second edge, which is opposite the first edge, along an approach path extending in the first direction, and step c) is performed when the arm moves from the second edge toward the first edge along a return path along the first direction.

[0034] According to another embodiment of this method for delivering small droplets of fluid to an open tray, prior to step a), the movable arm is progressively accelerated until it reaches a constant or substantially constant speed v. depl And after the arm passes over the tray, it gradually decelerates to avoid fluid loss. By providing gradual acceleration or deceleration of the movable arm—that is, without abrupt changes—fluid losses outside the processing phase are minimized or eliminated, which can represent a significant cost to the user. By way of illustration only, when steps b) and c) are performed twice separately over an open tray containing poultry, the movable arm gradually accelerates before step a) until it reaches a constant or substantially constant moving speed v. deplFor example, at the beginning of its passage over the tray. After the distribution of small droplets of at least one first fluid onto this tray, during the approach movement, if the movable arm is above this tray (step b), the arm gradually accelerates until it stops in the grading or reversing zone of the movable arm, extending beyond the receiving area of ​​the open tray, said movable arm then extending only to the dimensions of the tray. For the purpose of the movable arm passing a second time over the same tray to ensure the dispensing of at least one second fluid (step c), the arm again gradually accelerates in its grading zone, such that it reaches the tray at a constant or substantially constant speed. After the tray has been fully treated with two different fluids, the movable arm then gradually decelerates as it reaches the relative grading zone.

[0035] According to another embodiment of this method for delivering small droplets of fluid onto an open tray, the first fluid is a liquid to be sprayed, and the second fluid is a gel, such as a soft gel, or a fluid having a viscosity between 50 cps and 200 cps at 20°C. Preferably, the viscosity of this fluid is between 50 cps and 180 cps at 20°C, and even more preferably between 54 cps and 177 cps at 20°C. Even more preferably, the viscosity is between 100 cps and 120 cps at 20°C. By way of illustration only, the first fluid is an aqueous composition containing a vaccine. This gel may contain a staining agent for visually inspecting the uniform distribution of droplets on the open tray.

[0036] Each set of supply circuits may advantageously include an electric or pneumatic pump for supplying fluid to the corresponding fluid nozzle.

[0037] According to another embodiment of this method for delivering small droplets of fluid onto an open tray, and each of steps b) and c), a plurality of small droplets having a uniform or substantially uniform size are formed. For this purpose, it is possible to check the fluid supply pressure at each nozzle in each group for a given type of nozzle. Preferably, at step b), a mist of small droplets is formed, of which at least 80%, preferably at least 90%, have a size between 145 micrometers and 230 micrometers. Advantageously, at step c), a plurality of small droplets are formed, of which at least 80%, preferably at least 90%, have a size between 900 micrometers and 1500 micrometers.

[0038] According to another embodiment of this method for delivering small droplets of fluid onto an open tray, the flow rate at the nozzles and the movement speed of the movable arm are checked to ensure uniform or substantially uniform distribution of the small droplets on the tray. Preferably, the flow rate for delivering the first fluid at each of the nozzles is between 6 mL / sec and 40 mL / sec, preferably between 8 mL / sec and 20 mL / sec, and the flow rate for delivering the second fluid at each of the tips is between 15 mL / sec and 50 mL / sec, preferably between 15 mL / sec and 25 mL / sec. The pressure applied to deliver the first fluid is between 3 bar and 130 bar, and the pressure applied to deliver the second fluid is between 0.2 bar and 1 bar.

[0039] According to another embodiment of this method for delivering small droplets of fluid on an open tray, the fluid incorporates one or more active ingredients for vaccinating bird species, such as poultry, or fluids other than vaccines, such as nutritional compositions.

[0040] According to another embodiment of this method for delivering small droplets of fluid onto an open tray, at least two different first fluids are dispensed by spraying and / or at least two different second fluids are dispensed by spraying individual droplets. By way of illustration only, each set of dispensing nozzles may include two nozzle bevels for dispensing two different products in a single pass. Therefore, the method of the invention also covers dispensing two or more different fluids to be sprayed or atomized and / or spraying two or more fluids in the form of individual droplets. These latter fluids are preferably sprayed through a tip.

[0041] The present invention also relates to an apparatus for dispensing small droplets of fluid for carrying out the methods as previously described. According to the invention, this apparatus comprises:

[0042] - A work area designed to store and support a tray, which is stored in a fixed manner.

[0043] - A single arm movable to move over the working area in a first direction, this arm carrying a set of spray application nozzles and a set of tips, the nozzles and tips being arranged such that the tray is covered by this set of spray application nozzles and this set of tips over its entire dimension in a second direction perpendicular to the first direction, and

[0044] - This device is configured to ensure the time offset between dispensing at least one first fluid by means of the set of spray dispensing nozzles and dispensing at least one second fluid by means of the set of tips.

[0045] While compactness is advantageous, this device allows for the delivery of two different fluids, such as spray and gel, in very short time intervals or almost simultaneously for large-scale processing of poultry placed on trays or baskets.

[0046] This type of time offset between the application of the two fluids allows for the avoidance of dilution of the gel droplets due to the small droplet mist of the first fluid.

[0047] The spray nozzles may have flat or conical tips. Preferably, they are flat to form a curtain of small droplets. Each of these tips is configured to eject individual droplets of fluid through its orifice at a given fluid pressure.

[0048] According to a particular embodiment of this device, the device includes a component for checking the movement speed of the movable arm.

[0049] According to another embodiment of this device for dispensing small droplets of fluid, a first set of spray nozzles and a second set of tips are spaced apart from each other on the movable arm in a first direction. Advantageously, this spacing is calculated to ensure effective treatment of poultry with the second fluid. By way of example, the spacing between the two (2) sets is between 4 cm and 10 cm, preferably between 4 cm and 7 cm, and even more preferably 5 cm.

[0050] According to another embodiment of this device, the working area includes grading regions for movable arms extending on both sides of the tray storage area, the movable arms preferably being adjustable to accommodate different trays. Preferably, the set of nozzles and the set of tips are spaced apart from each other by a distance d in a first direction on the movable arm, and each grading region has a dimension along the first direction that is at least equal to or substantially equal to the distance d separating these sets on this arm.

[0051] According to another embodiment of this device, the device includes several sensors for automatically triggering the application of the device to small droplets. Alternatively, this triggering can be performed manually by an operator. By way of example, one or more cameras and a computer program for processing images received from or from these cameras can allow the proper positioning of the basket to be detected before actuation of the movable arm is triggered. Actuation can also be a combination of positioning sensors and manual actuation by the operator.

[0052] According to another embodiment of this device, the set of nozzles includes at least two subsets of nozzles for dispensing each by spraying a different fluid, and / or the set of tips includes at least two subsets of tips for spraying droplets of a different fluid. Each of these subsets is connected to itself or a separate fluid supply circuit.

[0053] This type of equipment is particularly useful in the field of veterinary medicine, especially for large-scale vaccination of chicks. Attached Figure Description

[0054] Referring to the accompanying drawings, other advantages, objectives, and specific features of the invention will be revealed by the following description, which is given for illustrative purposes and not for limitation, in which:

[0055] Figure 1

[0056] [ Figure 1 [This is a front view of an apparatus for the large-scale processing of chicks according to a specific embodiment of the present invention;]

[0057] Figure 2

[0058] [ Figure 2 ]yes Figure 1 A perspective view of the equipment;

[0059] Figure 3

[0060] [ Figure 3 ]yes Figure 1 Another perspective view of the equipment;

[0061] Figure 4

[0062] [ Figure 4 ]yes Figure 1 The equipment is shown in perspective and top view, with the basket containing the chicks placed in its work area and awaiting processing; Figure 5

[0063] [ Figure 5 ]yes Figure 1 A cross-sectional view of the equipment, showing a basket containing chicks placed in its working area and awaiting processing; Detailed Implementation

[0064] The figures and descriptions below essentially contain elements with certain characteristics. Therefore, they can not only be used to allow for a better understanding of the invention, but also to aid in its definition when necessary.

[0065] First, it should be noted that the diagram is not drawn to scale.

[0066] Figures 1 to 5 An apparatus for the large-scale processing of chicks according to a specific embodiment of the present invention is illustrated schematically.

[0067] This device includes a frame 10 with legs 11, each leg having rollers 12 at its free end for providing movement of the frame. The device may include two to four rollers 12. Each of these rollers 12 may include a blocking member (not shown) for securing the device in place.

[0068] The frame 10 includes, in its upper portion, an enclosed space defined by walls 13, which are at least partially transparent to allow visibility of the interior. One of these walls 13 includes a movable flap 14 that moves vertically to allow access to the enclosed space, specifically for introducing and removing baskets 15 containing chicks, and also for cleaning and maintaining the equipment. In addition to this physical barrier formed by the movable flap 14, and if desired to keep the equipment open, the device may also include one or more protective elements (not shown) to detect the presence of objects intruding into the processing area, such as an operator's hand or arm. This or these protective elements are capable of sending a detection signal to a central processing unit, which can stop the ongoing processing or even trigger a halt to processing. By way of example, this or these protective elements are infrared detectors. Of course, the frame 10 may still lack this type of movable flap 14 or even this type of protective element.

[0069] The interior of this enclosed space includes a work area intended to store and support the open basket 15, which is then placed in a fixed position.

[0070] A movable arm 16, mounted on a longitudinal track 17 defining a first direction, can translate along this track 17 above the work area. The longitudinal track 17 is integrated with the upper end of the frame 10 or a cover.

[0071] The movable arm 16 carries a set of nozzles 18 and a set of application tips 19, which are arranged on the movable arm 16 such that the entire dimension of the basket 15 in a second direction perpendicular to the first direction defined by the longitudinal track 17 is integrally covered by the set of nozzles 18 and the set of application tips 19.

[0072] These nozzles and tips can be moved individually along the 16 movable arms to allow for adjustment of the coverage of different baskets.

[0073] Of course, this device may include a position sensor (not shown) to determine the exact location of the basket in the work area. It is then possible to automate the fluid dispensing sequence by automatically identifying the type of basket 15 placed in the dispensing device.

[0074] The set of nozzles 18 includes spray dispensing nozzles, while another set includes dispensing tips 19, each of which includes an orifice, each tip being configured to eject individual droplets of fluid through its orifice for a given fluid pressure.

[0075] While compactness remains an advantage, this device allows for the delivery of two different fluids, such as spray and gel, in short time intervals or near-simultaneously for large-scale processing of poultry placed in open basket 15.

[0076] Therefore, this device includes two reservoirs 20, which are placed in a support 21 at the user's height. These reservoirs 20 are advantageously transparent to allow for verification of the available fluid level in each of them.

[0077] Each fluid supply circuit connecting the reservoir 20 to its set of nozzles and corresponding applicator tips includes a pumping unit (not shown), and the pumping units of the two supply circuits may have different pumping powers depending on the fluid to be pumped in each of these supply circuits.

[0078] Check the flow rate used to supply the nozzles and tips, as well as the moving speed of the movable arm 16, to ensure a uniform and consistent distribution of the fluid applied to the open basket 15.

[0079] The set of nozzles 18 and the set of application tips 19 are also arranged on the movable arm 16 to ensure a time offset between the dispensing of the first fluid (evaporable fluid) and the dispensing of the second fluid (gel).

[0080] The extended movable arm 16 includes two lateral edges defining a front surface and a rear surface. Considering the translational movement direction of this arm in a first direction, the set of nozzles 18 is mounted on the front surface of this movable arm 16, while the set of application tips 19 is mounted on the rear surface of this movable arm 16, and is therefore spaced apart from the set of nozzles 18 in the first direction.

[0081] Therefore, it is ensured that distribution by spraying or even by the splitting of small droplets of the first fluid for the first set of nozzles 18 always precedes the distribution of droplets of the second fluid by the set of application tips 19. Thus, there is no risk that the mist of small droplets formed by spraying the first fluid might prevent the droplets of the second fluid from adhering to the chick's feathers, a risk that could lead to non-uniform treatment of the chick.

[0082] Preferably, the working area of ​​the device includes graded areas of movable arms 16 extending on both sides along a first direction of the storage area of ​​the basket, to allow for progressive acceleration and deceleration of the movable arms before and after they pass over the basket 15.

[0083] Advantageously, it is desirable not only to maintain a constant speed of movement of the movable arm 16 above the basket 15, but also to avoid abrupt movements of the arm that could lead to fluid loss.

[0084] For this purpose, the device includes a component for checking the moving speed of the movable arm 16.

[0085] According to one embodiment of the device of the present invention, the minimum distance d between the set of nozzles 18 and the set of application tips 19 spatially separated in a first direction is between 5 cm and 9 cm. The moving speed of the arm is between 35 cm / s and 80 cm / s, preferably 55 cm / s.

Claims

1. A method for delivering small droplets of fluid onto an open tray (15) containing poultry, said tray (15) being stationary, characterized in that: a) a movable arm (16) is moved in translation above said tray (15) in a first direction, said movable arm carrying a first set of dispensing nozzles (18) and a second set of dispensing nozzles (19), said first and second sets of dispensing nozzles being arranged to cover the entire dimensions of said tray (15) in a second direction perpendicular to said first direction, wherein said movable arm is progressively accelerated until it reaches a constant or substantially constant speed of movement, and after said movable arm has passed over said tray, said movable arm is progressively decelerated to avoid fluid loss, and wherein said movable arm moves only at constant speed when directly above said tray; b) at least one first fluid is dispensed by spraying by means of said first set of dispensing nozzles (18), c) after step (b), at least one second fluid different from said at least one fluid is dispensed by individual droplet ejection by means of said second set of dispensing nozzles (19); wherein each set of nozzles is arranged on said arm to create a time offset between steps b) and c) to ensure effective treatment of said poultry by each fluid.

2. The method of claim 1, wherein, Said first fluid is a spray and said second fluid is a gel.

3. The method of claim 1, wherein, Steps b) and c) are achieved in a single pass of said movable arm (16) over said tray (15), said first and second sets of dispensing nozzles being arranged on said movable arm so as to create a time offset between steps b) and c).

4. The method of claim 1, wherein, In step b), said movable arm moves from a first edge to a second edge of said tray (15) on an approach path extending along said first direction, said second edge being opposite said first edge, and in step c), said arm moves from said second edge towards said first edge over a return path along said first direction.

5. The method of claim 1, wherein, Said first fluid is a liquid to be sprayed and said second fluid is a gel, or a fluid having a viscosity of between 50 and 200 cps at 20°C.

6. The method of claim 1, wherein, In each of steps b) and c), a plurality of small droplets having uniform or substantially uniform size is formed.

7. The method of claim 6, wherein, In step b), a mist of small droplets is formed, at least 80% of said small droplets having a size of between 145 and 230 microns.

8. The method of claim 6, wherein, In step c), a plurality of small droplets is formed, at least 80% of said small droplets having a size of between 900 and 1500 microns.

9. The method of claim 1, wherein, The flow rate of said first and second sets of dispensing nozzles and said speed of movement of said movable arm (16) are adjusted to ensure uniform or substantially uniform distribution of said small droplets on said tray (15). In step b), a mist of small droplets is formed, at least 80% of said small droplets having a size of between 145 and 230 microns. In step c), a plurality of small droplets is formed, at least 80% of said small droplets having a size of between 900 and 1500 microns. The flow rate of said first and second sets of dispensing nozzles and said speed of movement of said movable arm (16) are adjusted to ensure uniform or substantially uniform distribution of said small droplets on said tray (15).

10. The method of claim 1, wherein, The movable arm is driven by a drive unit comprising an electric motor, and each fluid to be dispensed is taken out of a container containing the fluid by a syringe, the piston of which is electrically actuated, and wherein the acceleration or deceleration of the movable arm is controlled in synchronism with the variation of the flow rate of each fluid to be dispensed, thereby ensuring the uniform distribution of the latter on the open tray.

11. The method of claim 1, wherein, The movable arm moves at a constant or substantially constant movement speed between 35 and 80 cm / sec.

12. An apparatus for dispensing small droplets of a fluid for carrying out the method according to claim 1, characterized in that The device comprises: - a work area for receiving and supporting a tray (15) which is received in a fixed manner, - a movable arm (16) which can move translationally to move above the work area along a first direction, the movable arm (16) carrying a set of spray dispensing nozzles (18) and a set of tips (19), the set of spray dispensing nozzles and the set of tips being arranged so that the entire dimension of the tray (15) in a second direction perpendicular to the first dimension is covered by the set of spray dispensing nozzles (18) and the set of tips (19), and wherein - the device is configured to ensure a time offset between the dispensing of at least one first fluid by means of the set of spray dispensing nozzles (18) and the dispensing of at least one second fluid by means of the set of tips (19), and wherein the device is configured to: a) progressively accelerate the movable arm until it reaches a constant or substantially constant movement speed, b) maintain the constant or substantially constant movement speed when directly above the tray, and c) progressively decelerate the movable arm thereby avoiding fluid loss.

13. The apparatus of claim 12, wherein, The set of dispensing nozzles (18) and the set of tips (19) are spaced apart from each other on the movable arm (16) in the first direction.

14. The apparatus of claim 12, wherein, The work area comprises a zone for staging the movable arm (16) extending on both sides of the receiving area of the tray (15).

15. The apparatus of claim 12, wherein, The set of dispensing nozzles (18) comprises at least two subsets of nozzles each for spraying a different fluid, and / or the set of tips (19) comprises at least two subsets of tips each for ejecting a different fluid. The movable arm moves at a constant or substantially constant movement speed between 35 and 80 cm / sec. The device comprises: - a work area for receiving and supporting a tray (15) which is received in a fixed manner, - a movable arm (16) which can move translationally to move above the work area along a first direction, the movable arm (16) carrying a set of spray dispensing nozzles (18) and a set of tips (19), the set of spray dispensing nozzles and the set of tips being arranged so that the entire dimension of the tray (15) in a second direction perpendicular to the first dimension is covered by the set of spray dispensing nozzles (18) and the set of tips (19), and wherein - the device is configured to ensure a time offset between the dispensing of at least one first fluid by means of the set of spray dispensing nozzles (18) and the dispensing of at least one second fluid by means of the set of tips (19), and wherein the device is configured to: a) progressively accelerate the movable arm until it reaches a constant or substantially constant movement speed, b) maintain the constant or substantially constant movement speed when directly above the tray, and c) progressively decelerate the movable arm thereby avoiding fluid loss. The set of dispensing nozzles (18) and the set of tips (19) are spaced apart from each other on the movable arm (16) in the first direction. The work area comprises a zone for staging the movable arm (16) extending on both sides of the receiving area of the tray (15). The set of dispensing nozzles (18) comprises at least two subsets of nozzles each for spraying a different fluid, and / or the set of tips (19) comprises at least two subsets of tips each for ejecting a different fluid.

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