Printing machine and printing system having a screen magazine for printing on a flat substrate

Abstract

The present invention relates to a printing machine (1) for printing on a flat substrate, particularly a circuit board, comprising: a printing table (4) extending in a horizontal plane and having at least one substrate to be printed disposed thereon; at least one printing device assigned to the printing table (4), wherein the printing device has a screen holder (12) for a replaceable printing screen (22, 23) and a doctor device (7) assigned to the screen holder (12), wherein, by the doctor device (7), a printing material can be applied onto the substrate to be printed through the printing screen (22, 23); and a screen magazine (18) assigned to the doctor device (7) for storing at least one printing screen (22, 23) for the doctor device (7). According to the present invention, the screen magazine (18) comprises a housing (19) having at least two drawers (20, 21) arranged parallel to each other and designed to hold one print screen (22, 23), the housing (19) is designed to hold at least one print screen (22, 23) of the screen magazine (18), and the housing (19) is rotatably positioned between a first end position in which the drawers (20, 21) are oriented parallel to the horizontal plane and a second end position in which the drawers are oriented perpendicular to the horizontal plane, particularly the horizontal plane.

Description

Technology Field

[0001] The present invention relates to a printing machine for printing on a planar substrate, particularly a circuit board, comprising: a printing table extending in a horizontal plane and having at least one substrate to be printed disposed thereon; at least one printing device assigned to the printing table, wherein the printing device comprises a screen holder for a replaceable printing screen and a doctor device assigned to the screen holder, wherein a printing material may be applied to the substrate to be printed through the printing screen by the doctor device; and a screen magazine assigned to the doctor device for storing at least one printing screen for the printing device.

[0002] In addition, the present invention relates to a printing system having a printing machine designed as described above. Background Technology

[0003] Printing machines and printing systems of the type mentioned above are known in the prior art. It is known that, for printing on a flat substrate using printing materials, particularly electrically conductive printing paste, printing materials are applied to the substrate to be printed, for example, by a doctor device and a printing screen. To this end, a known printing machine has a printing table on which the substrate to be printed can be placed and, in particular, submerged, and has the previously mentioned doctor device and a printing screen placed between the doctor device and the substrate. First, the printing material is applied to the printing screen on the side of the printing screen facing away from the substrate, and then pressed or compressed onto the substrate below through the printing screen by the doctor device. Since only one printing pattern can be applied to the substrate per printing screen, a separate printing screen must be created and prepared for the desired printing image. In particular, when printing on individual substrates with different printing materials along different structures, if it is not desirable to provide a separate printing machine for each printing process, the exchange of printing screens is required. Accordingly, a screen magazine used to store multiple printing screens and allocated to the doctor device for exchanging printing screens has already been developed in the past. Today, for example, a changer is known that performs the exchange of printing screens stored in a screen magazine with those of a printing machine in a fully automated manner. As such, the known screen magazine is arranged independently next to the printing machine and is designed to hold multiple printing screens. A printing machine equipped with such a screen magazine requires a large amount of installation space, which is practically unusable, especially on a production line.

[0004] Accordingly, the object of the present invention is to provide an improved printing machine that enables advantageous exchange of printing screens with almost no installation space despite the presence of a screen magazine.

[0005] The object of the present invention is achieved by a printing machine having the features of claim 1. The screen magazine has the advantage of being placed in the printing machine in such a way that it requires only a large amount of installation space when replacement occurs and saves installation space otherwise. This makes it possible, for example, to place the screen magazine in a path for a person or worker passing through the printing machine to perform the replacement process, and otherwise place the printing machine on a production line to clear the path. This ensures the advantageous use of available installation space, for example, in a production hall. According to the present invention, this is achieved by a screen magazine having a housing having at least two drawers arranged parallel to each other and designed to hold one printing screen each, said housing being rotatably positioned with respect to a doctor device so as to be rotatable between a first position in which the drawers are oriented parallel to a horizontal plane and a second end position in which the drawers are oriented particularly perpendicular to said horizontal plane. Thus, said screen magazine is rotatably mounted between a horizontal orientation and one orientation inclined thereto. In the horizontal direction, the housing or the screen magazine extends far into the space next to the printing machine, whereas in the vertical direction, it relies substantially on the printing machine, so little installation space is required next to the printing machine. Accordingly, the rotation of the screen magazine achieves only temporary use of the installation space, and as a result, the printing machine can be positioned in a location where a passageway sufficiently wide temporarily must exist within the machine to allow, for example, a person or an autonomously moving transport vehicle to pass through. To ensure that the installation space is advantageously clear when the screen is not being exchanged, it is preferable for the housing to have a height significantly smaller than the length of the housing.Thus, the length of the housing is understood to mean the (horizontal) longitudinal extension of the housing at the first end position, and thus the height of the housing is understood to mean the (vertical) height of the housing at the first end position. Preferably, for this purpose, the screen magazine has a limited number of drawers, such as, for example, at most four or fewer, preferably two or fewer. In particular, the screen magazine may be integrated or integrated into a printing machine in a permanent / fixed or interchangeable / removable manner.

[0006] According to a preferred improvement of the present invention, the housing is oriented at least substantially perpendicularly to the drawer at the second end position. This results in particularly low utilization of the installation space when the screen is not replaced or when printing processing is performed on the printing machine by the printing screen. To this end, the housing is rotated 90° from the horizontal to the vertical end position or in the opposite direction.

[0007] According to a preferred improvement of the present invention, the housing is mounted so as to be height-adjustable relative to the screen holder at least at the first end position. By adjusting the height of the housing, the height of the printing screen placed in the housing and maintained in the drawer can be moved. In this way, for example, the printing screen used for printing is always positioned at the height of the screen holder thanks to the height adjustment of the housing. Consequently, each screen can always be extended from the housing to the same height relative to the screen holder, thus requiring simple mechanics or kinematics to perform the actual replacement process. According to another embodiment of the present invention, the housing can pivot up to 180°, so that it reaches the second end position from the storage position below the printing table, thereby saving maximum installation space next to the printing machine. According to another embodiment of the present invention, the drawer is additionally or alternatively height-adjustable within the housing, so that the height of the printing screen being inserted or pushed out can be displaced within the housing, so that it is not always at the desired height relative to the doctor device or the screen holder.

[0008] Additionally, it is preferable that the printing machine has a device designed to insert a printing screen into one of the drawers and pull it from one of the drawers to the screen holder. Thus, this device is used to exchange the printing screen. Accordingly, the exchange process is performed particularly fully automatically by the printing machine itself.

[0009] Particularly preferably, the device is designed as a magnetically actuated gripping device. As such, the printing screen is preferably magnetizable or self-magnetized to cooperate with the gripping device. Thanks to this magnetic design, a positive-fit connection between the device and the printing screen is not required, allowing the printing screen itself to be implemented at a low cost and saving installation space.

[0010] Particularly preferably, the device is designed separately from the doctor device. This means that the device has its own actuator for moving each print screen from the screen magazine to the doctor device and vice versa.

[0011] According to an alternative embodiment of the present invention, the device is formed by the doctor device itself. This means that the doctor device is suitable for, for example, inserting one of the print screens into the screen magazine and pulling another print screen from the screen magazine and placing it in the screen holder. Generally, the doctor device has a carrier or carriage that extends across the print table, is guided by rails at the ends, and can be moved using a drive. This enables simple positioning of the doctor device or the doctor blade of the doctor device. Thus, for example, a doctor blade holder for holding the doctor blade is provided to be movable by the doctor device on the print table and used as a gripping device for displacing the print screen. To this end, the doctor blade holder is designed to be magnetizable, for example, to displac one of the print screens if necessary. Particularly preferably, in this case, the doctor blade holder is movable to a height, particularly to grip or release the print screen.

[0012] According to another embodiment of the present invention, the device is preferably formed integrally with a camera device capable of moving across the printing table. A known printing machine has a camera device used to determine, for example, the accurate orientation and / or position of a substrate on the printing table, or the accurate orientation and / or position of a printing screen to be employed on the doctor device. To this end, the camera moves across the printing table in a manner that visually captures the substrate and / or the printing screen. Then, image analysis is used to determine whether the printing screen and the substrate are oriented in an optimal direction relative to each other. If a deviation is detected, for example, the printing screen or the substrate is displaced from the printing table until a desired position is reached. Since such a camera device includes a camera movable in the XY plane, an actuator already present to move the camera can be used to grasp the printing screen and insert and remove it from the housing. To this end, the camera device optionally has a mechanical gripper or plunger, or a magnetic or magnetizable gripper, thereby enabling it to grasp and move each printing screen.

[0013] Particularly preferably, the printing table, the doctor device, and the screen magazine are arranged or maintained on a frame. The frame allows the printing table, the doctor device, and the screen magazine to be positioned relatively advantageously relative to each other.

[0014] Additionally, it is preferable that the housing be rotatably mounted to the frame. In this way, the housing is simply allocated and mechanically connected to the doctor device. This ensures a rigid placement of the screen magazine in the printing machine.

[0015] Preferably, the housing of the screen magazine is mounted on the frame so that its height can be displaced, thereby achieving the advantage of the height adjustment described above.

[0016] Particularly preferably, the housing is mounted to the printed table by a linearly displaceable pivot joint. The pivot joint enables rotation of the housing, and the linear displacement enables height adjustment.

[0017] Preferably, at least one controllable actuator is assigned to the housing for moving the housing, in particular for rotating and / or displacing the housing or the screen magazine. In this way, the housing can be automatically adjusted to a first or second end position and the height can be automatically adjusted.

[0018] Particularly preferably, the actuator is designed as an electric, hydraulic, or pneumatic actuator. Additionally, it is desirable that a releaseable retainer designed to lock the housing to the first end position in a positive-fit manner be assigned to the housing. This saves energy for holding the housing in the first end position, for example, because the actuator does not need to permanently hold the housing in the first end position against gravity. Rather, the releaseable retainer ensures a positive-fit lock, such as a latch engagement, particularly in the frame.

[0019] Preferably, the housing is designed to hold printing screens of different sizes. To this end, for example, the drawer is designed differently or is designed to accommodate printing screens of different sizes in the drawer.

[0020] Particularly preferably, each drawer is designed to hold a doctor tool for each printing screen and doctor device. Thus, it is achieved that the printing screen can be arranged in the housing together with the doctor tool, specifically the doctor blade. Carrying the doctor blade together with the printing screen has the advantage that the doctor device can be simply converted to a different printing material or type of printing material because the doctor blade is held together with the printing screen and is exchanged together. In this way, the cleaning of the doctor blade to perform additional printing processes with a different printing material can be omitted. This further reduces the conversion time of the printing machine. In particular, each printing screen has at least one holder for a doctor blade, so that the doctor blade can be carried together with each printing screen.

[0021] Particularly preferably, the screen magazine is arranged to be releaseable or interchangeable in the frame or the doctor device. In this way, the exchange of the entire screen magazine or the screen magazine can be easily performed, for example. Thus, the screen magazine can be mounted and prepared away from the printing machine and then added to the printing machine, for example, fixed to the frame and connected or coupled to at least one actuator. Particularly preferably, the screen magazine is designed to be released or removed from the rest of the printing machine by a robot, particularly a material handling tool, and is moved to a pick-and-place machine for, for example, to exchange the printing screen mounted with the printing screen or the printing magazine. According to another embodiment of the present invention, the screen magazine is preferably placed in a permanent or fixed manner in the frame or the doctor device so that a particularly rigid connection to the frame or the doctor device can be implemented.

[0022] According to a preferred improvement of the present invention, the screen magazine has means for pushing / pulling out or pulling a print screen into one of the drawers. For example, the means is a pusher positioned at the end of the housing in a direction away from the doctor device to push at least a portion of the print screen out of the housing as needed, which can be more easily grasped by a device for displacing or exchanging the print screen.

[0023] In addition, the present invention relates to a printing system for printing on a flat surface having a printing machine designed as described above.

[0024] A printing system according to the present invention having the features of claim 18 is characterized by having at least one printing screen designed to be maintained in one of the drawers of a screen magazine. To this end, the printing screen has, for example, an outer contour corresponding to the dimensions of each drawer.

[0025] Particularly preferably, the printing screen is designed to hold at least one doctor tool, in particular a doctor blade, and each drawer of the screen magazine is designed to hold the printing screen together with the at least one doctor tool. As a result, the advantages already mentioned above are obtained. Brief explanation of the drawing

[0026] The present invention will be described in more detail below with reference to the drawings. In addition, FIG. 1 shows a perspective view of a printing machine with a glass surface, and FIGS. 2A and FIGS. 2B show a printer in different operating states from the side, and Figure 3 shows a detailed perspective view of a printing machine. Specific details for implementing the invention

[0027] Fig. 1The figure shows a perspective view of an advantageous printing machine (1) designed to print on a flat substrate, for example, to produce a circuit board, particularly using an electrically conductive printing material or paste. As such, the printing machine (1) has a frame (2) that carries the housing (3), which protects the components of the printing machine (1) located inside the housing (3) from external influences. A printing table (4) is arranged in the housing (3) having a support surface (5) that extends horizontally to support one or more substrates to be printed. Preferably, the printing table (4) is height-movable, as shown by the double arrow (6), to ensure an optimal height position of the substrate to be printed. Above the printing table (4), that is, above the opposite support surface (5), the printing machine (1) also has a doctor device (7). The doctor device (7) has a first carriage (8) displaceable across the printing table (4) along a horizontally extending rail guide (9), and a second carriage (10) mounted on the first carriage (8) so as to be displaceable laterally with respect to the pushing direction of the rail guide (9). A doctor blade mount (11) is arranged on the second carriage (10) and is designed to hold and operate a doctor tool, in particular a doctor blade (36).

[0028] A screen holder (12) is arranged vertically between a printing table (4) and a carriage (9, 8). Advantageously, the screen holder (12) has a drawer-type rail guide (13) that extends parallel to a rail guide (9) and has guide rails (13_1, 13_2), such as screen or stencil support strips, placed parallel to each other on the printing table (4) like the rail guide (9). The rail guide (13) is designed to guide or transport a printing screen at its edge so that printing material can be applied to the printing screen and printed onto a substrate supported on the printing table (4) through the printing screen by a doctor blade placed on a doctor blade mount (11).

[0029] Additionally, the printing machine (1) has a camera device (14) having a camera (15) arranged to be movable vertically between the doctor device (7) and the printing table (4). To this end, the camera (15) is held on a carriage (16) mounted on a carriage (17) so as to be displaced longitudinally, similar to the doctor blade mount (11), wherein the carriage (17) is displaced longitudinally parallel to the rail guide (9) of the doctor device (7) above the printing table (4) and displaced below the doctor device (7). This allows the camera (15) to be moved across the entire printing table (4). Preferably, in this case, the camera (15) is arranged or designed to be assigned to the printing table (4) and / or the doctor device (7), particularly the screen holder (12), to check the position of the substrate supported on the printing table (4) and / or the position of the printing screen fixed to the rail guide (13) or the screen holder (12) before the printing process is performed. For example, if a deviation from the target position of the current actual position of the printed substrate or printed screen is detected, automatic adjustment is performed or the printing machine (1) recommends that the operator align the substrate and / or screen correctly.

[0030] In addition, the printing machine (1) has an advantageous screen magazine (18) that can operate to simplify, especially to automate, the conversion of the printing machine (1) for the printing process using a different printing screen than previously used.

[0031] According to the present exemplary embodiment, the screen magazine (18) has two drawers (20, 21) arranged parallel to each other in the housing (19). Each drawer (20, 21) is operable to hold at least one print screen, wherein a print screen (22) is arranged in the drawer (20) and a print screen (23) is arranged in the drawer (21). Preferably, the print screens have different print structures.

[0032] Fig. 2A Is Fig. 1 A side view of the printing machine (1) is shown in the illustrated state. Here, the screen magazine (18) is oriented vertically and the printing screen (22, 23) located therein Fig. 2A As indicated by the dotted line, they are arranged standing vertically next to each other, and therefore Fig. 2A As indicated by the dashed line, the supporting surface (5) of the printing table (4) or screen holder (12) is at an angle of approximately or exactly 90° with respect to the plane to which it extends.

[0033] Because the housing (19) is designed with only two drawers (20, 21) to hold two printing screens (22, 23), the housing (19) protrudes only slightly laterally from the housing (3) of the printing machine (1) at the vertical end position. As such, the space next to the printing machine (1) in the area of ​​the screen magazine (18) can be used for other purposes. For example, the space next to the printing machine (1) is a corridor or path (24) adjacent to the production line in the production hall.

[0034] The screen magazine (18) is rotatably mounted on the frame (2), as indicated by the arrow (25). Fig. 2A From the vertical end position shown in Fig. 2B It is pivotable to the horizontal end position shown in. To this end, the screen magazine (18) is fixed to the frame (2) by a swivel or pivot joint (26). In this way, the pivot joint (26) or the axis of rotation formed by the pivot joint (26) is conveniently positioned in a vertical orientation at the top of the housing (19) or the screen magazine (18). In this manner, Fig. 2A The free end (27) of the screen magazine (18) located at the bottom is at least the screen magazine (18) Fig. 2BAs illustrated in [Image], it can be pivoted around the rotation axis of the pivot joint (26) until horizontal orientation is reached. In this state, the print screens (22, 23) located in the drawers (20, 21) are positioned parallel to each other and are oriented horizontally above each other, where the print screen (23) is positioned above the print screen (22) according to the exemplary embodiment.

[0035] At the horizontal end position, Fig. 2B As illustrated in the figure, at least one of the drawers (20, 21) is positioned at the height of the rail guide (13), so that the print screen located in this drawer can be moved from the housing (19) of the screen magazine (18) on the rail guide (13) of the screen holder (12) to the print position by simply displacing it. Fig. 2B In this example, each example of the rail guide (13) is shown with a dotted line. In order to allow the second drawer (20) to also be assigned to the rail guide (13), the pivot joint (26) is preferably Fig. 2B As illustrated by the double arrow (28), it is mounted on the frame (2) to be height-displaceable. Due to this height displacement, either one or the other drawer (20, 21) can be assigned to the rail guide (13), and thus either one or the other print screen can be pushed out of the housing (19) or inserted into the housing (19). Alternatively, or additionally, the height of the screen holder (12) or the rail guide (13) can be moved or displaced by an actuator controllable according to the double arrow (28) to move the screen holder (12) and the desired drawer (20 or 21) in a common plane.

[0036] According to an advantageous exemplary embodiment of the printing machine (1), the gripping device (29) is Fig. 1As illustrated in the figure, the printing screens (22, 23) are placed on the carriage (16) of the camera device (14), thereby allowing the printing screens to be displaced. As a result, the camera device (14) forms a device (30) that inserts the printing screen into one of the drawers (20, 21) and, if necessary, pulls it out of one of the drawers (20, 21) into the screen holder (12). In this case, the gripping device (29) is designed to work with each printing screen (22, 23) to displace them, for example, as a transport pin for mechanically engaging and displacing them from behind the printing screen, or particularly as a magnetic gripper that generates a magnetic field by electrification. To this end, the printing screens (22, 23) are made of a corresponding material or have a material in at least part of the material, which works with the magnetic gripper.

[0037] For example, the conversion process of the printing machine (1) occurs as follows. A printing screen, for example, a printing screen (23), is already positioned on the guide rails (13_1, 13_2) of the screen holder (12), and the printing process is already performed by the printing screen (22). Now, another printing process must be performed and another printing pattern is required, so the printing screen (22) and the printing screen (23) need to be exchanged. First, the existing printing screen (22) is inserted into a free drawer, for example, a drawer (21), by means of a camera device (14) or a gripping device (30) along the rail guide (13). To do this, the screen magazine (18) Fig. 2BAs illustrated in FIG. 2A, the drawer (20) is moved from a vertical end position to a horizontal end position in advance and, if necessary, its height is adjusted so that it is positioned at the height of the rail guide (13). This ensures that the print screen (22) can be easily inserted into the screen magazine (18). Then, the height of the screen magazine (18) is adjusted so that another drawer containing the print screen (23) is positioned at the height of the rail guide (13). Now, the gripping device (20) magnetically grips the print screen (23) assigned to the rail guide (13) and pulls it from the drawer (21) onto the rail guide and to a desired position on the printing table (4) so ​​that the printing process can be performed by the print screen (23). In this way, the conversion is performed in a short time, particularly in a fully automated manner. During a printing process or multiple printing process in which the same print screen (23) is used, the housing (19) is conveniently adjusted to a vertical end position as illustrated in FIG. 2A, so that the passage along the path (24) is cleared. The housing (19) of the screen magazine (18) can be blocked by protruding into the path (24) only at a horizontally oriented end position. Thus, the screen magazine (18) serves as an exchange device or conversion device for the printing machine (1).

[0038] At the vertical end position, Fig. 2A and also Fig. 1 As illustrated in the figure, the screen magazine (18) can be equipped with a printing screen by an operator or in an automated manner. As a result, the conversion process of the printing machine (1) can be prepared without the screen magazine (18) occupying a large amount of installation space next to the printing machine (1), especially in the path (24) area, while the printing process is being performed.

[0039] It is preferable that there be at least one actuator (31) designed, for example, as an electric, pneumatic, or hydraulic actuator, to move and rotate the screen magazine (18) and to rotate and / or adjust the height of the screen magazine (18). To achieve the latter, for example, a pivot joint (26) is displaceably mounted on a rail guide on the frame (2) and is displaceable by the actuator (31) or another actuator.

[0040] Optionally, the screen magazine (18) is kept in a releaseable or interchangeable position, particularly in the frame (2), so that it can be removed from the printing machine (1) by a worker or robot, particularly a material handling tool, and moved to another location, for example, for equipment having additional or different printing screens as needed.

[0041] Fig. 3 To show the internal structure of the screen magazine (18), an additional perspective view of an enlarged detail of the printing machine (1) is shown in an area of ​​the screen magazine (18) from which the housing (19) of the screen magazine (18) has been removed. For example, the drawers (20, 21) are formed by laterally arranged guide rails (32) or plate supports. As such, the drawers (20, 21) are designed to be sufficiently high to hold one printing screen (22, 23) each. In the exemplary embodiment illustrated in FIGS. 1 and 3, the printing screens (22, 23) are arranged in the drawers (20, 21). Fig. 1 In contrast to, Fig. 3 It shows a screen magazine (18) in a horizontal end position.

[0042] Each printing screen (22, 23) has a printing screen (33) in which a screen (34) is held, particularly clamped. The screen may be a printing stencil or a printing mask. Additionally, a holding device (35) for holding a doctor tool, particularly a doctor blade (36), is arranged on each frame (33). In this way, the holding device (35) is firmly connected to the frame (33) so that the doctor blade (36) can be carried together with each printing screen (22, 23).

[0043] This improves the conversion of the printing machine (1) in that not only the printing screen but also the doctor blade used with the printing screen can be exchanged or converted in an automated manner. By doing so, for example, the printing screen (22, 23) can be loaded with different printing materials and processed with different doctor blades without the need to exchange the doctor blade, or especially during the conversion of the printing machine (1), it is achieved.

[0044] According to another exemplary embodiment, the gripping device (30) is formed by the doctor device (7) rather than the camera device (14). For this purpose, the carriage (10) has, for example, a gripper (15). Alternatively, the doctor blade mount (11) is designed to automatically grip the doctor blade (36). As soon as the doctor blade (36) of the print screen (23) placed in the screen magazine (18) is gripped, the entire print screen (23) can be moved by moving the doctor blade (36). As a result, the print screens (22, 23) of the printer (1) are converted by the doctor device (7) without requiring additional gripping devices, etc.

[0045] Optionally, screen magazine (18) is, for example Fig. 2BAs illustrated, each drawer (20, 21) has a means (37) assigned to it, in particular a pusher, thereby allowing at least a portion of the print screens (22, 23) located in each drawer (20, 21) to be pushed out of the housing (18) in the direction of the screen holder (12), thus simplifying the holding of each print screen (22, 23) in the device (30), in particular by the doctor device (7).

[0046] A printing machine (1), together with printing screens (22, 23), and additional printing screens not shown in this specification, having different printing patterns, for example, and designed to be maintained in a drawer (20, 21) and a screen holder (12), forms an advantageous printing system.

Claims

Claim 1 A printing table (4) extending in a horizontal plane and capable of having at least one substrate to be printed disposed thereon; at least one printing device assigned to the printing table (4), comprising a screen holder (12) for a replaceable printing screen (22, 23) and a doctor device (7) assigned to the screen holder (12), wherein a printing material can be applied onto the substrate to be printed through the printing screen (22, 23) by the doctor device (7); and a screen magazine (18) assigned to the doctor device (7) to store at least one printing screen (22, 23) for the doctor device (7). A printing machine (1) for printing on a flat substrate comprising: a device (30) designed to insert a printing screen (22, 23) into one of the drawers (20, 21) and to remove it from the drawer (20, 21); wherein the screen magazine (18) has a housing (19) having at least two drawers (20, 21) arranged parallel to each other and designed to hold one printing screen (22, 23) each, and the housing (19) is pivotably positioned between a first end position where the drawer (20, 21) is oriented parallel to the horizontal plane and a second end position where the drawer is oriented at an angle to the horizontal plane, and the device (30) is formed by a camera device (14) that is movable across a printing table (4). Claim 2 A printing machine according to claim 1, wherein the housing (19) is oriented such that the drawer (20, 21) is perpendicular to the horizontal plane at the second end position. Claim 3 A printing machine according to claim 1, wherein the housing (19) is mounted so as to be height-adjustable at least at the first end position. Claim 4 delete Claim 5 A printing machine according to claim 1, characterized in that the device (30) has a magnetically operated gripping device. Claim 6 A printing machine according to claim 1, characterized in that the device (30) is designed separately from the doctor device (7). Claim 7 delete Claim 8 delete Claim 9 A printing machine according to claim 1, characterized by having a frame (2) on which the printing table (4), the doctor device (7), and the screen magazine (18) are arranged. Claim 10 A printing machine according to claim 9, characterized in that the housing (19) is mounted on the frame (2) so as to be height-displaceable. Claim 11 A printing machine according to claim 9, wherein the housing (19) is mounted to the frame (2) by a linearly displaceable pivot joint (26). Claim 12 A printing machine according to claim 1, characterized in that at least one controllable actuator (31) for moving and / or rotating the screen magazine (18) is assigned to the housing (19). Claim 13 A printing machine characterized in that, in paragraph 12, the actuator (31) is designed as an electric, hydraulic, or pneumatic actuator. Claim 14 A printing machine according to claim 1, characterized in that the screen magazine (18) is designed to hold printing screens (22, 23) of different sizes. Claim 15 A printing machine according to claim 1, characterized in that each drawer (20, 21) is designed to hold each printing screen (22, 23) and a doctor tool assigned to each printing screen. Claim 16 A printing machine according to claim 9, characterized in that the screen magazine (18) is replaceably maintained on the frame (2). Claim 17 A printing machine according to claim 1, wherein the screen magazine (18) has means for pushing and pulling a printing screen into one of the drawers. Claim 18 A printing system for printing on a flat surface comprising: a printing machine (1) according to any one of claims 1 to 3, 5, 6 and 9 to 17; and at least one printing screen (22, 23) designed to be maintained in one of the drawers (20, 21) of the screen magazine (18). Claim 19 A printing system according to claim 18, characterized in that the printing screen (22, 23) is designed to hold a doctor tool, and each drawer (20, 21) is designed to hold the printing screen (22, 23) together with the doctor tool.

Images