Thin plate substrate feeding device and processing machine connectable thereto

Abstract

The present invention relates to a thin sheet substrate feeding device for a processing machine, which includes: - a feeding and guiding element (2) for at least one bundle of thin sheet substrates (3) having an adjustable height gauge (4) for passing one thin sheet substrate (3.1) at a time; - a suction-function feeding table (5) having a plurality of wheels (6) integrated with at least one rotating shaft for feeding the thin sheet substrates (3.1) by movement; and - a driving means positioned behind the gauge (4) in the direction of movement of the thin sheet substrates (3.1) for feeding the thin sheet substrates (3.1) to the processing machine, wherein the feeding table (5) does not move, and the device includes control means configured to selectively stop the rotation of the corresponding rotating shaft.

Description

Technical Field

[0001] The present invention relates to a feeding machine for supplying a thin plate-like base material such as a cardboard sheet or a corrugated board to a cardboard processing machine, and particularly to a feeding machine for a machine that applies a pretreatment product such as a varnish or a primer for subsequent digital printing.

Background Art

[0002] In the processing of cardboard, particularly in the application of decorations and patterns by digital printing, it is often necessary to apply a pretreatment product, a varnish, or a primer before printing with ink. This process is performed by a roller machine for applying the pretreatment product, and a layer of the pretreatment product of a predetermined thickness is applied to the surface of the cardboard by a combination of different rollers. Conventionally, these machines have a vacuum table with wheels for feeding the cardboard to the application roller in an appropriate manner before the cardboard enters the application roller.

[0003] For the automation of the process, these machines are combined with a cardboard feeding device configured to hold a stack of cardboard sheets and supply them individually in the direction of the pretreatment machine. This cardboard feeding device is fixedly arranged at an appropriate position, and the pretreatment product application machine is attached thereto.

[0004] The feeding device is composed of a hopper or an adjustable part for supplying stacked cardboard, and includes an adjustable gauge that forms a passing gap corresponding to the thickness of the cardboard sheet. At the lower part of the hopper, there is a table equipped with a plurality of wheels for moving / supplying each cardboard sheet. In order to have a better driving force, the feeding table includes a suction table that sucks the cardboard sheet to assist the wheels in advancing the cardboard sheet more effectively. Further, at the outlet of the passing gap of the gauge, the feeding device has a lower feeding roller and a corresponding pressing roller above it to move the cardboard sheet to the supply port of the pretreatment machine.

[0005] In the operating cycle of this feeder, the vacuum table sucks the cardboard sheet, and by transmitting the rotation of the wheel, the cardboard sheet moves towards the pre-processing machine or processing machine at a speed required by the pre-processing machine. When the cardboard sheet exits through the gap of the gauge and its leading edge reaches the feed roller and pressure roller, the suction table rises, thereby preventing the wheel from contacting the cardboard sheet (the wheel is fixed, and the top plate of the table rises, so that the horizontal tangent to the top of the wheel is below the top surface of the table plate, thus avoiding contact). The wheel is driven by a single motor. However, since suction is still present, the exiting cardboard sheet and the cardboard sheet immediately above it that is ready for discharge are sucked into the suction table. The suction table is an unchanging element that holds the cardboard sheet.

[0006] Despite being held by the raised suction table, the outgoing cardboard sheet gains sufficient driving force from the drive roller to be ejected. At the same time, when the next cardboard sheet comes into contact with the raised suction table, it is held, preventing the outgoing cardboard sheet from pulling it. Thus, when the rear side of the cardboard sheet reaches the passage gap of the gauge and is released from the stack of cardboard, the suction table descends to its initial position where the wheel comes into contact with the next cardboard sheet being pulled out, and the cycle restarts.

[0007] However, this process has several problems, leading to defects in the cardboard sheets and reduced productivity.

[0008] One problem that arises is friction between the cardboard sheet and the suction table in the raised position, requiring additional energy, i.e., a higher driving force for the pressure roller, to obtain sufficient driving force.

[0009] When the suction table is raised, the pressure rollers must be able to pull the cardboard sheet when the wheels are no longer in contact with it, which means that certain cardboard sheets will be marked by the pressure of the rollers, rendering them unusable.

[0010] Another problem arising from the raising and lowering of the suction table is damage to the edges of the cardboard bundles due to tearing, breakage, bending, etc., caused by the guiding and holding elements in the supply section. Furthermore, the same raising and lowering motion of the suction table causes friction with the discharge gauge, which also leads to clogging and damage, rendering the cardboard sheets unusable.

[0011] An additional problem arises due to the minimum length of cardboard sheets that must be supplied in a particular production process. Because the rear side of the cardboard sheet exceeds the axis of the first wheel while the feeding device is in operation, a minimum length must be maintained between the rear end of the cardboard and the axis of the first wheel to ensure that the cardboard sheet has enough time to exit the gauge and be pulled by the feeding roller and its pressure roller before the suction table rises and loses its driving force to the wheel, and also to prevent the wheel from feeding the next cardboard sheet too quickly. This constraint results in a very short suction table that does not have enough driving force for longer cardboard sheets that may be available in other production lines.

[0012] Patent Document 1 addresses one of the aforementioned problems. To do so, in order to eliminate pressure rollers and avoid damage to the cardboard sheet, Patent Document 1 discloses a supply device comprising a suction table and a corresponding wheel at the outlet of the gauge, which in this case obtains the driving force necessary to supply the cardboard to a machine that processes it into a box. This alternative solves the problem of the pressure rollers described above, but the movement of the suction table still causes friction on the outer periphery of the cardboard sheet.

[0013] Another problem encountered with feeders is when there are two or more stacks of cardboard being fed in parallel lines. In this case, a separator is needed in the middle to ensure that each sheet of cardboard is correctly positioned on the conveyor line. When the feeder table with suction function moves, the separator cannot be supported as it obstructs the free movement of the suction table, creating a gap between the separator and the feeder table. This situation means that when the feeder table is lowered, the material being fed is not guided on the side with the separator, which can lead to jamming or displacement of the material during feeding. [Prior art documents] [Patent Documents]

[0014] [Patent Document 1] U.S. Patent Application Publication 2022 / 0063938 [Overview of the project] [Problems that the invention aims to solve]

[0015] Given the aforementioned shortcomings and limitations of currently available configurations, a solution is needed that avoids damage to the cardboard sheets while simultaneously providing smooth movement to prevent rapid movement and misalignment of the cardboard sheets being fed into the processing machine. [Means for solving the problem]

[0016] To achieve this objective, solve the technical problems described above, and provide additional advantages described later, the present invention provides a thin sheet material feeding device for a processing machine, and this device is - A supply and guide element for at least one bundle of thin sheet substrates, equipped with an adjustable height gauge for passing one thin sheet substrate at a time, - A supply table with a suction function, equipped with multiple wheels integrated with at least one rotating shaft, for supplying thin plate-shaped substrates by movement, - A drive means for feeding the thin plate-shaped substrate to a processing machine, positioned behind the gauge in the direction of movement of the thin plate-shaped substrate, The device includes a supply table that does not move, and the device is equipped with control means configured to selectively stop the rotation of the corresponding rotating shaft.

[0017] This configuration allows the feed table to be kept stationary, i.e., immobile to receive thin substrates on top, and the rotation axis of the wheel that could act on the next substrate to be stopped in advance. The corresponding rotation axis refers to a rotation axis or a group of rotation axes that are independently driven by a single independent drive unit and are selectively stopped according to the requirements of substrate supply.

[0018] In this invention, a rotating shaft refers to an shaft that has the function of advancing the substrate. For example, an additional shaft may exist for load distribution, but in this case, since it does not have an additional driving function, the additional shaft is not included in the definition of a rotating shaft in this invention. However, these may constitute part of a practical alternative to the invention.

[0019] This configuration allows the suction table to be kept stationary without the need to raise it to avoid wheel movement, as in conventional technology. As a result, the bundle of substrates does not move, and therefore damage to the edges of the substrates due to friction with the guiding and holding elements at the supply section of the thin-sheet substrate bundle is avoided. The supply section refers to a hopper or a hollow section surrounded by walls that can be adjusted according to the dimensions of the thin-sheet substrates.

[0020] Another problem of the prior art that this invention solves is avoiding friction with the suction table when the suction table is in the raised position. In this invention, energy consumption is reduced because the material being removed is always in contact with the drive wheel until it exits the passage gauge.

[0021] Furthermore, by maintaining the driving force by the wheels, it becomes possible to move the base material according to the required speed without using a pressure roller or by reducing the pressure of the roller. The driving force of the supply roller arranged at the outlet is sufficient to be added to the driving force by the wheels that maintain contact with the thin plate-shaped base material. Moreover, since there is no friction with the suction table as in the prior art, it provides a greater driving force than known configurations. This prevents the thin plate-shaped base material from being marked and discarded by the contact surface of the roller.

[0022] Preferably, the control means of the thin plate-shaped base material supply device of the present invention is configured to stop the corresponding rotating shaft before the next thin plate-shaped base material of the thin plate-shaped base material comes into contact with the wheel.

[0023] Preferably, the thin plate-shaped base material supply device of the present invention includes a plurality of rotating shafts and a plurality of wheels corresponding thereto, has driving means for each rotating shaft and / or each group of the plurality of rotating shafts, and the control means is configured to stop the driving means corresponding to the rotating shaft or the group of the plurality of rotating shafts to be stopped before the next thin plate-shaped base material of the thin plate-shaped base material is supplied and comes into contact with the wheel of the corresponding rotating shaft.

[0024] In other words, regardless of whether the rotating shaft is independently driven or forms part of a group of a plurality of rotating shafts in the same driving device that is stopped, the next supply base material is stopped before coming into contact with the next base material to be supplied in order to prevent it from moving before its predetermined timing.

[0025] The time when the next base material to be supplied can contact the wheel of a predetermined rotating shaft becomes the limit time for stopping the rotation of the rotating shaft. The stopping time is determined by the control means. The stopping time when the next base material contacts the wheel depends on the distance between the shafts, the rigidity of the base material, the dimensions of the base material, the weight of the bundle of base materials, the material density of the base material, and the like.

[0026] This stops the stopped shaft from supplying driving force, preventing the next substrate from being pulled in or jammed. Preferably, the shaft and its corresponding wheel remain stopped until the sheet substrate passes through the passage gauge, after which all shafts are driven again for a new feeding cycle of the sheet substrate.

[0027] Another advantage of the present invention is that, unlike the prior art, it is not necessary to ensure a minimum length of substrate before the rear side of the substrate contacts the first wheel during movement, as it is driven by a feed roller. This makes it possible to provide a suction table of the required length.

[0028] According to the features of the present invention, the wheel, which is integrated with the rotating shaft, is configured to move freely when the rotating shaft stops.

[0029] As a result, the wheel rotates with the rotating shaft, but if the rotating shaft stops while a thin sheet material is being supplied, the wheel rotates freely, preventing friction between the wheel and the supplied thin sheet material due to the stopping of the rotating shaft. This configuration is particularly interesting when there is a group of shafts driven by the same drive unit, so that all shafts stop when the drive unit stops, or when, for safety reasons, one of the rotating shafts is stopped during supply before the rear side of the material passes, or when, for example, the material is already being driven by a drive means located behind the gauge.

[0030] According to the features of the present invention, at least one rotating shaft is rotatable in the opposite direction to the direction corresponding to the movement of the thin plate-like substrate, providing a reverse driving force to the wheel, which is useful when the thin plate-like substrate has to be repositioned if it has been pulled out at an inappropriate time for some reason.

[0031] According to another feature of the present invention, the feeding table is equipped with means for moving the thin sheet substrate laterally. The feeding and guiding elements of the thin sheet substrate feeding device are equipped with lateral guides or stoppers for the thin sheet substrate, but to avoid jamming, there is preferably a clearance of about 0.5 mm on each side relative to the guide. As a result, this clearance can sometimes cause the substrate to rotate relative to the feeding direction. Therefore, with the configuration of this table equipped with means for moving the thin sheet substrate laterally, it is possible to avoid misalignment of the substrate by, for example, moving the thin sheet substrate toward the left guide and feeding it relative to the left guide.

[0032] These means for moving the substrate laterally are in the form of grooves on the table surface, which help to move the substrate laterally as it moves forward toward the feeder. Alternatively, at least one wheel is configured to move the substrate laterally toward a corresponding lateral guide. This could be, for example, an inclined axis or wheels interspersed between the axes of the feed wheel. In the latter case, the wheel can be concealed, for example, by a pneumatic mechanism once the substrate is in contact with the lateral guide. In the case of an inclined axis, the inclined rotating axis can be stopped with the substrate in contact with the guide and the wheel exposed, and feeding can be performed by the aforementioned feed rotating axis while the wheel is allowed to rotate freely in the forward direction.

[0033] This configuration allows for correction of the substrate's position, which is related to the fact that the supply table does not move, a feature that was not possible with known conventional technologies.

[0034] Preferably, the drive means at the gauge outlet is a supply roller with at least one supply roller, or a supply roller with a corresponding pressure roller.

[0035] More preferably, the drive means at the gauge outlet is a second feed table with a suction function, comprising a plurality of movable wheels having independent drive axes and / or a plurality of movable wheels having a plurality of rotation axes driven together by one or more drive devices. This configuration is made possible by maintaining drive by the wheels of the feed table, which maintain contact with the material being fed out. Depending on the speed requirements of the processing machine, a combination of the second suction table at the gauge outlet and feed rollers is also possible.

[0036] Preferably, the driving means is a servo motor, which facilitates better control of wheel acceleration and braking.

[0037] According to the features of the present invention, the supply table comprises at least two suction regions, and the control means is configured to selectively activate / deactivate the suction regions. This divided suction table configuration is an interesting choice for the length of the supply table suitable for large thin substrates, so that each suction region can be activated or deactivated at any time depending on the length of substrate being supplied.

[0038] According to the features of the present invention, the thin-plate substrate feeding device includes a separator that can be fixed to the feeding table for separating and aligning multiple thin-plate substrates when they are fed in parallel. Since the suction table does not move, the design of a movable separator as in the prior art is unnecessary, reducing the difficulty and cost of manufacturing, and further eliminating easily failing mechanical elements, resulting in a highly reliable embodiment. By combining this feature with the means for moving the thin-plate substrates laterally as described above, it becomes possible to move the substrates relative to a separator that functions as a reference. This was impossible in the prior art due to the space between the separator and the feeding table used to lift the table itself.

[0039] According to another feature of the present invention, the thin-plate substrate feeding device comprises means for moving the device to another location, preferably wheels, which can move the device in the direction of movement of the substrate during feeding, for connecting to a corresponding processing machine or for maintenance work.

[0040] In another aspect, the present invention also relates to a sheet-like substrate processing machine, preferably a coating machine for applying a pretreatment, comprising means for moving the sheet-like substrate in the direction of movement, and connectable to a feed inlet of the processing machine, in this case a pretreatment application roller. The substrate feeding device is provided with a second suction table at the gauge outlet that provides the driving force necessary for supplying the substrate to the processing machine. Conventionally, such processing machines have a feed table with a suction function and wheels at the inlet for feeding and accelerating the sheet-like substrate supplied from the sheet-like substrate feeding device. However, the configuration of the present invention makes it possible to eliminate the feed table in a coating machine for applying a pretreatment and connect it to the sheet-like substrate feeding device. This configuration improves accessibility to the dosing roller and pretreatment application roller of the processing machine, thereby facilitating maintenance, particularly cleaning maintenance. Furthermore, continuity is provided in the transport of the sheet-like substrate. [Brief explanation of the drawing]

[0041] [Figure 1] This shows a schematic front view of a conventional thin-plate substrate supply device before the thin-plate substrate begins to move. [Figure 2] This is a schematic front view of a conventional thin-plate substrate feeding device, with the black arrow indicating the raising of the suction table. [Figure 3] This is a schematic front view of a conventional thin-plate substrate feeding device, with the black arrow indicating the descent of the suction table. [Figure 4] This is a schematic front view of a preferred embodiment of the thin-plate substrate supply device of the present invention, before the thin-plate substrate begins to move. [Figure 5] Figure 4 is a schematic front view of a preferred embodiment of the thin-plate substrate supply device at the point when the rear surface of the thin-plate substrate has passed the first wheel. [Figure 6] Figure 4 is a schematic front view of a preferred embodiment of the thin-plate substrate supply device at the point when the rear side surface portion of the thin-plate substrate has passed the second wheel. [Figure 7] Figure 4 is a schematic front view of a preferred embodiment of the thin-plate substrate supply device at the point when the rear side surface of the thin-plate substrate reaches the last wheel. [Figure 8] Figure 4 is a schematic front view of a preferred embodiment of the thin-plate substrate supply device at the point when the thin-plate substrate exits the passage gauge. [Figure 9] This is a schematic top perspective view of another embodiment of a thin-plate substrate feeding device having two supply lines. [Figure 10] This is a schematic front view of another embodiment of the present invention, which features a longer suction table. [Figure 11] This is a schematic front view of a thin-plate substrate supply device connected to a coating machine for applying pre-treated materials using conventional technology. [Figure 12] This is a schematic front view of a preferred embodiment of a thin plate-shaped substrate supply device connected to a coating machine for applying a pre-treated substance of the present invention. [Modes for carrying out the invention]

[0042] Referring to the drawings above and according to the reference numerals, preferred embodiments of the present invention can be seen therein, which include parts and components shown and described in detail below.

[0043] Figures 1-3 show an embodiment based on the prior art. As seen in Figure 1, the length L2 from the passage gauge (4') to the point where the cardboard sheet (3.1') is pressed by the pressure roller (10') must be shorter than the length L1 from the rear side or rear end of the cardboard sheet (3.1') to the vertical axis of the first wheel (6'), ensuring that the end of the cardboard sheet (3.1') does not come into contact with the next cardboard sheet in its path, and that no wheel (6') moves in contact with the next cardboard sheet. Because this relationship between lengths L1 and L2 must be followed, the length of the feed table (5') is limited for short substrates such as cardboard sheets (3.1') of about 600 mm in length, and it becomes a feed table (5') that is not suitable for long cardboard sheets (3.1').

[0044] Furthermore, as shown in Figure 2, when the outgoing cardboard sheet (3.1') is supplied, the feed table (5') is raised to prevent the next cardboard sheet from coming into contact with the wheel (6'). As a result, the wheel (6') does not move when the feed table (5') is raised, and therefore the wheel (6') does not come into contact with the next cardboard sheet (3').

[0045] As shown in Figure 3, once the rear side of the cardboard sheet (3.1') has passed through the gauge (4') and been pulled in by the pressure roller (10') and the feed roller (8'), the suction table (5') descends to its initial position, thereby allowing the next cardboard sheet to descend and come into contact with the wheel (6') for its movement.

[0046] As described above, the movement of the suction table (5') creates friction with the cardboard sheet (3.1'), and when the suction table (5') is in the raised position, the cardboard sheet (3.1') is decelerated by friction with the suction table (5'), requiring a greater driving force from the supply roller (8'), which in turn requires a greater pressure from the pressure roller (10'). As a result, marks and defects appear on the cardboard sheet (3.1'), necessitating its disposal.

[0047] A cycle of the supply process in a practical embodiment of the thin-plate substrate supply device (1) according to the present invention, which solves these problems in the prior art, can be visualized with reference to Figures 4-8. The thin-plate substrate is preferably a cardboard sheet (3.1).

[0048] Figure 4 shows how the cardboard sheets (3.1) of the stack of cardboard (3) come into contact with a suction-equipped feed table (5) and corresponding wheel (6) due to the weight on top of the stack of cardboard (3). The wheel (6) rotates to provide the acceleration necessary to feed the cardboard sheets (3.1) into the processing machine.

[0049] The novelty of the present invention lies in the timing of the cycle shown in Figure 5. In this case, the suction table (5) does not move, and to prevent the next cardboard sheet from being pulled in before a predetermined time, when the rear side of the cardboard sheet (3.1) reaches the vertical position of the axis of the first wheel (6), the axis stops before the next cardboard passes that vertical position and comes into contact with the wheel (6). The remaining wheel (6) continues to rotate, providing driving force to the cardboard (3.1).

[0050] To stop the axle, the present invention preferably provides each wheel (6) with an independent drive device. The drive device is preferably a servo motor, and the cardboard supply device (1) is provided with control means to send a stop signal to the servo motor driving the first wheel (6).

[0051] The time it takes for the rear side of the cardboard sheet (3.1) to reach the axle (6) of the first wheel is calculated by a control means, for example, by reading the time at the exit of the rollers (8, 10) where the front and rear sides of the cardboard sheet (3.1) are read to ensure that feeding is being done correctly.

[0052] Therefore, the control means calculates when the rear side of the cardboard sheet (3.1) will reach the wheel axle (6) based on the reading, the dimensions of the cardboard sheet (3.1), the supply speed, etc., and uses this information to send a stop signal to the servo motor.

[0053] As shown in Figure 6, when the rear side of the cardboard sheet (3.1) reaches the axle (6) of the second wheel, the second servo motor stops, just like the first servo motor, and only the third wheel (6) continues to move. In this configuration, the next cardboard sheet is placed on the stationary feed table (5) by suction, but because there is no driving force, it is not dragged, and the exiting cardboard sheet (3.1) has enough driving force that the pressure roller (10) is not required, or the pressure from the pressure roller (10) is minimized, so that no defects are made in the cardboard sheet (3.1).

[0054] Referring to Figure 7, when the rear side of the cardboard sheet (3.1) passes the last wheel (6), the last axle and its corresponding wheel (6) stop, and with sufficient driving force provided by the roller (8) and / or its pressure roller (10), the cardboard sheet (3.1) is fed into the processing machine.

[0055] At the end of the cycle, the stack of cardboard sheets releases the trailing end of the base material in its path, and all the wheels (6) are driven by servo motors to provide power to the next cardboard sheet and start a new cycle.

[0056] In another embodiment, Figure 9 shows a cardboard feeder (1) with two feed lines, comprising a separator (9) fixed to a feed table (5), the separator (9) separating and guiding both cardboard sheets (3.1). In this case, adjustment to cardboard sheets of different dimensions is performed by a holding and guiding means for the storage location of the stack of cardboard sheets (3), the separator (9) remains fixed at the feed table (5) at all times. This configuration facilitates manufacturing and avoids errors and defects that may occur in configurations known in the prior art, which have a cavity between the feed table and the separator that allows the feed table to be raised.

[0057] Figure 10 shows an embodiment in which the advantages provided by the present invention, particularly the increased driving force provided by the wheels (6) that maintain the movement of the cardboard sheet (3.1) until it passes the gauge (4), allows for the use of longer cardboard sheets (3.1), for example, up to 5000 mm. This requires that the longer suction table (5) has more wheels (6) to provide greater driving force.

[0058] In this case, the suction table (5) is divided into multiple suction areas (5.1) to accommodate different lengths. Depending on the length of the stacked cardboard sheets (3), the control means closes the suction of the suction areas (5.1) outside the length of the stacked cardboard (3), preventing the corresponding wheels (6) from moving. This results in a versatile cardboard feeder (1) suitable for cardboard (3.1) of various lengths.

[0059] According to another aspect of the present invention, there is a cardboard processing machine that can be connected to a cardboard supply device (1), and an assembly formed by both machines. In the illustrated embodiment, the processing machine is preferably a coating machine (11) for applying a pretreatment material.

[0060] According to the conventional technology shown in Figure 11, it can be seen that conventionally, the cardboard feeding device (1') is fixed in place on the production line, while the coating machine (11') that applies the pre-treatment material is movable in a direction perpendicular to the sheet.

[0061] In this prior art embodiment, the coating machine (11') for applying a pretreatment material includes a feed table (11.1) with a suction function for supplying cardboard sheets (3.1) to impart the necessary speed to the cardboard sheets (3.1) at the inlet of the coating roller (13'). In this configuration, the machine (11') is detached from the cardboard feeder (1') for maintenance work, but access to the dosing roller (12') and coating roller (13') is difficult due to the presence of the suction-equipped feed table (11.1), hindering easy access to the rollers and resulting in prolonged downtime for maintenance, which significantly reduces productivity.

[0062] This problem is solved in an embodiment of the present invention in which the cardboard feeder (1) has a second suction table (7) with a corresponding wheel (7.1) at the outlet of the gauge (4). In this configuration, the cardboard sheet (3.1) is provided with an appropriate speed according to the requirements of the coating roller (13) of the coating machine (11) for coating the pretreatment material, and the driving force provided by the second suction table (7) eliminates the need for a supply roller (8) and a corresponding pressure roller (10). In this case, the cardboard feeder (1) can be directly coupled to the coating machine (11) for coating the pretreatment material without a supply suction table (11.1).

[0063] As shown in Figure 12, both the cardboard feeder (1) and the coating machine (11) for applying the pretreatment material have means of moving along the direction of movement of the cardboard sheets (3.1), so that they can be directly coupled and provide continuous movement of the cardboard sheets (3.1) from the bundle of cardboard sheets (3) to the coating rollers (13) of the coating machine (11) for applying the pretreatment material.

[0064] In another embodiment, as shown in Figure 13, the supply table (5) is equipped with means for moving the cardboard sheet (3.1) laterally. In this case, the axis of rotation of the wheel (6) is inclined perpendicular to the direction of movement of the cardboard sheet (3.1), thereby moving the cardboard sheet (3.1) toward the lateral guide of the supply and guide section (2) used as a reference for supplying the cardboard sheet (3.1) to the processing machine, or toward the separator (5).

[0065] All of the remarkable features of this invention described above lead to improved productivity through faster cardboard sheet feeding speeds, elimination of friction-induced defects, elimination of pressure roller indentations, and elimination of jams. Furthermore, it provides smooth movement that prevents misalignment and other issues. [Explanation of symbols]

[0066] 1 Thin plate substrate supply device 3. Stacks of cardboard 3.1 Cardboard Sheet 4 gauge 5. Supply table (suction table) 6 wheels 7. Second suction table 8 Laura 9 Separator 10 Pressure rollers 11. Coating machine 13. Application roller

Claims

1. - A supply and guide element (2) for at least one bundle of thin sheet substrates (3), equipped with an adjustable height gauge (4) for passing one thin sheet substrate (3.1) at a time, - To supply the thin plate-shaped substrate (3.1) by movement, a supply table (5) with a suction function is provided, which is equipped with a plurality of wheels (6) integrated with at least one rotating shaft, - A drive means for feeding the thin plate-shaped substrate (3.1) to a processing machine, which is positioned behind the gauge (4) in the direction of movement of the thin plate-shaped substrate (3.1), A thin sheet material supply device for a processing machine, wherein the supply table (5) does not move, and the thin sheet material supply device is equipped with control means configured to selectively stop the rotation of the corresponding rotating shaft.

2. The thin-plate substrate feeding device (1) according to claim 1, wherein the control means is configured to stop the corresponding rotating shaft before the next thin-plate substrate (3.1) supplied comes into contact with the wheel (6).

3. A thin sheet substrate supply device (1) according to claim 1 or 2, comprising a plurality of rotating shafts and corresponding wheels (6), wherein each rotating shaft and / or each group of the plurality of rotating shafts has a driving means, and the control means is configured to stop the driving means corresponding to the rotating shaft or the group of the plurality of rotating shafts before the next thin sheet substrate (3.1) is supplied and comes into contact with the wheel (6) of the corresponding rotating shaft.

4. The thin plate-shaped substrate supply device (1) according to any one of claims 1 to 3, wherein the wheel (6) is configured to move freely when its rotation axis stops.

5. The thin sheet material supply device (1) according to any one of claims 1 to 4, wherein at least one of the rotation axes is rotatable in a direction opposite to the direction corresponding to the movement of the cardboard sheet.

6. The thin plate substrate supply device (1) according to any one of claims 1 to 5, wherein the supply table (5) is provided with means for moving the thin plate substrate (3.1) in the lateral direction.

7. The thin plate substrate supply device (1) according to claim 6, wherein the means for moving the thin plate substrate (3.1) laterally is at least one wheel (14) configured to move the thin plate substrate (1) laterally toward the lateral guide of the supply and guidance element (2).

8. The thin-plate substrate feeding device (1) according to any one of claims 1 to 7, wherein the driving means is at least one supply roller (8).

9. The thin-plate substrate feeding device (1) according to any one of claims 1 to 7, wherein the driving means is a second feeding table (7) having a suction function and a plurality of movable wheels (7.1), and the plurality of movable wheels (7.1) have a plurality of rotating shafts driven together by independent drive shafts and / or a single drive device.

10. The thin plate-shaped substrate supply device (1) according to any one of claims 1 to 9, wherein the driving means is a servo motor.

11. The thin plate substrate feeding device (1) according to any one of claims 1 to 10, wherein the supply table (5) comprises at least two suction areas (5.1), and the control means is configured to selectively activate / deactivate the suction areas (5.1).

12. A thin-plate substrate supply device (1) according to any one of claims 1 to 11, further comprising a separator (9) that can be attached to the supply table (5) for separating and aligning a plurality of the thin-plate substrates (3.1) when they are supplied in parallel.

13. The thin plate-shaped substrate supply device (1) according to any one of claims 1 to 12, further comprising a moving means for moving the thin plate-shaped substrate supply device (1) to another location.

14. A processing machine comprising a means for moving the processing machine, wherein the processing machine is connectable at its supply inlet to a cardboard supply device (1) according to any one of claims 7 to 13.

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