JPH0211326A - Silk screen printer - Google Patents

Abstract

PURPOSE: To arrange a gripper and a print material to an aligning position even if a printing table is not aligned by fixedly relating the gripper at an aligning stop position with respect to a first stopper regardless of the stop position of the table and allowing the table to pass the stop position of the gripper. CONSTITUTION: After a printing sequence, a table returns to the aligning position of a gripper 8 and exceeds this position to move. At this time, an elongated element 20 is inclined in the moving direction of a table 2 at a small angle (a) from its revolving point 20a. The gripper 8 is pressed to a stopper 13 to be arranged at its aligning position and, after a printing table 2 passes this position, the elongated element 20 is rotated around its low revolving point 20a to further extend in the direction of a radius line 21 and the angle (a) thereof is reduced. The gripper 8 is lifted above the printing surface 2a of the printing table 2 to make it possible to insert an aligned print material into the gripper.

Description

TECHNICAL FIELD This invention relates to silk screen printers, and more particularly to silk screen printers of the type having a reciprocally rotating curved printing table, the printing table being a cylindrical printing table. It is preferable.

Silk screen printers, of the type with a flat stenciled frame or a frame carriage and cylindrical printing table, print on materials that are normally rigid, inflexible, or at least slightly curved. suitable for

Two subcategories can be added to this category of printers: (a) printers in which the material receiving the print is held firmly by a gripper placed within a stencil frame; and (b) printers that receive the print The material is printing
The printer is held firmly by grippers placed on the pull.

Printers belonging to subcategory (a) are primarily intended for printing hard materials.

For printers belonging to subcategory (b), it is possible to print on curved and flexible materials, and also on very thin materials.

The present invention mainly relates to silk screen printers that can be said to belong to subcategory (b).

For such printers, the stencil is mounted in a frame that moves back and forth in response to the reciprocating motion of a cylindrical printing table, or a frame carriage, and a squeegee device for pressing the stencil against the material and the printing table, or A corresponding device is provided for transferring the print to material disposed between the printing table and the stencil by relative movement between the squeegee device and the stencil, said squeegee device being fixed relative to the chassis of the printer.

In the case of a silk screen printer of the type belonging to the invention, a recess is provided in the printing surface of the printing table, and the leading edge portion of the print material in the feed direction is gripped by the recess and the gripper during at least part of the printing sequence.

As used herein, the term "gripper" refers to two pairs of gripping fingers that firmly grip the printing material at its leading edge.

The invention can also be applied to silk screen printers of the type with flat printing tables.

Background Art The printing table is composed of a reciprocating cylindrical drum, and the stencil frame or frame carriage is reciprocated in the horizontal direction, and the stencil frame is horizontally reciprocated by rotation of the drum. It is well known from British Patent No. 1467910.

a gripper for holding sheet material to be printed (hereinafter referred to as print material) is mounted on the printing table and moves along an arcuate path in response to movement of the drum or printing table;
The arcuate path coincides with the upper printing surface of the drum.

In the case of silk screen printers of the above-mentioned type belonging to sub-category (b), when stopped with the drum,
Methods have been used that allow thin print materials to be accurately registered by grippers on a drum even if the grippers are not placed in the registration position.

This invention is an improvement on the silk screen printer described in the aforementioned British patent specification.

SUMMARY OF THE INVENTION Technical Problem In the case of lux screen printers, in particular in the case of printers equipped with a cylindrical printing table consisting of a complete drum or half-drum (stop cylinder device) with reciprocating rotational movement, the printing table, gripper and It has been found difficult to accurately return the stencil frame to the same registration position, stop it, and grip the print material that has been placed in the registration position in a previous step by means of grippers attached to the table. It is being

Similarly, the gripper is first aligned to a precise position, the print material is placed to a precise alignment position, and then
It is understandable that it is difficult to grip the registered print material by a gripper.

It is also known that when a cylindrical printing table rotates back and forth, it has a large amount of kinetic energy, which creates significant problems in stopping the printing table, gripper and frame at an accurate preset position. ing. With high speed comes high kinetic energy, and even at a selected constant printing speed, it is quite difficult to stop the printing table and stencil frame in the same alignment position.

Such alignment is therefore particularly important when printing speed affects other technical issues.

When printing by a silk screen printer, in order to obtain high printing accuracy, the gripper and the printing material and the stencil frame need to be placed in the same relative position in each printing sequence, and the technical problem is that it has to be stopped abruptly. the gripper is movably mounted on the printing table (and is therefore not permanently fixed in a general position of the table), despite the large swinging masses and large kinetic energies of the printing table and frame;
To arrange a green soba at a preset position with respect to a printer chassis regardless of the stopping positions of a printing table and a frame (stencil) with respect to the printer chassis.

If any misalignment between the gripper, the gripped print material and the stencil is tolerated, then when printing the gripped material, the technical challenge is to align the print material and the stencil by simple means in the next printing sequence. The goal is to re-establish the necessary alignment between the two.

Another technical problem is to adjust the alignment of the gripper with respect to the printer chassis by simple means and to maintain this adjusted position over multiple printing sequences.

Another technical problem consists in positioning the gripper in a precise position at high speed by simple means and despite the large swinging mass and the large kinetic energy of the printing table.

Another technical problem, as is clear from the technical problem of silk screen printers of the kind according to the invention, is that only the gripper is stopped at a precise alignment position, and the prints are precisely aligned with respect to the chassis. The material can be gripped and the stencil, stencil frame and table stopped in an unregistered position relative to the chassis, resulting in a long delay time and delay path when the stencil and printing table are moved back. , a common guiding movement between the stencil, the printing table and the printing material allows the stencil to be placed in alignment with the gripper before the actual printing sequence begins, thereby allowing the printer to - to obtain the necessary accuracy of gripper positioning relative to -.

Another technical challenge is to stop small mass, low kinetic energy grippers and gripper mounting devices by simple means and thereby achieve alignment of the gripper with respect to the printer chassis or other reference point. be.

Another technical challenge is that the gripper rotates loosely relative to the printing table and during the gripper alignment sequence, regardless of the position of the stencil, only the top edge of the gripper can be easily aligned, and by other means. The purpose is to bring the printing material placed in the registration position into gripping engagement with the gripper so that the necessary registration interaction between the gripper, the printing material and the stencil is obtained throughout the subsequent printing sequence.

For this type of silkscreen printer, an important technical challenge is that in the first step, only the upper part of the gripper is placed in a precise alignment position with respect to the printer's shank or other reference point, and then aligned to this position. The stencil frame and the stencil pattern are displaced in a second stage by an alignment position W with respect to the gripper, and the gripper and the print material are moved throughout the printing sequence to print the material and to print the stencil and the print material. It is to hold the print materials in register with each other.

Another technical challenge is to provide a simple means to capture loose grippers upstream of the alignment position, decelerate the gripper more quickly than the printing table, and achieve accurate alignment.

Another technical challenge is that in a printing sequence, before the table catches up with the gripper, the loose gripper is given a movement that matches the movement of the printing table away from the alignment stop, and the table moves and the gripper is fixed. There is no need to create an interaction between the printing table and the clipper when the gripper is moving in the direction of the printing table at a speed that is somewhat lower than the speed of the table. The aim is to provide a means of This reduces the transmission of impact forces and energy.

Finally, the technical problem is to obtain the aforementioned retardation and acceleration effects with the same auxiliary device.

SOLUTION The present invention relates to a silk screen printer, and in particular to a type of silk screen printer having a curved printing table,
Preferably, the printing table is a fully cylindrical or partially cylindrical printing table suitable for printing printing material, with a stencil held in a stencil frame reciprocating over the table in response to rotational movement of the table. movement, the stencil is pressed against the printing material and the printing table by the squeegee device or its corresponding device, and the relative movement between the squeegee device and the stencil prints the printing material located between the table and the stencil, and the squeegee device or A corresponding device is fixed to the chassis of the printing table.

At least in part of the printing sequence,
The printing table interacts with the gripper to grip the leading edge of the print material in the direction of travel.

In order to solve the aforementioned problems, according to the invention, a printer is provided with a gripper, which is mounted for horizontal rotational movement on the table, and in one direction, in the direction of the longitudinal extension of the table, i.e. When extended in the direction of movement and in its alignment stop position, the gripper is fixed to the first stop means provided on the chassis of the printer, regardless of the stop position of the printing table, and the printing table is at the stop position of the gripper. pass through.

According to a preferred embodiment of the invention, the aforesaid stop position is adjusted and the alignment position of the gripper is adjusted horizontally, thereby adjusting the alignment of the gripper to a desired position relative to a reference point of the chassis or its pond. can do.

Preferably, the first stopper is fixed to the chassis or stand of the printer.

Essentially independent of gripper alignment, the delay action handles the high kinetic energy of rotating and moving masses, and without reducing printing speeds.
In order to obtain a long delay time, according to the invention, the printing table and the stencil frame pass through a position where the clipper is placed in the registration position, in this position the gripper is released and moved towards the stop position. It is configured to move, and its stopping position need not be an alignment position.

In order to be able to absorb the small kinetic energies of the moving gripper smoothly, according to another embodiment of the invention, the first stop means consists of a displacement damping device arranged at a certain end position; is preferably a hydraulic device.

When the gripper is placed in its alignment position,
The front end of the gripper that grips the material is slightly raised to allow it to easily interact with the registered print material.

According to another embodiment of the invention, the gripper is mounted on the free end of the elongate element, and the elongate element is pivotably mounted on the other end. During the printing operation and upon return to the registered position, for example, the gripper engages the second stop means and the elongated element extends in a direction related to the radius of the curved printing table, causing the free end of the element and the gripper to extend. is located on one side of the radial line, and the pivot attachment point of said element is located on the other side of the radial line. Preferably, the pivot point of attachment of the elongated element is spaced from the center of rotation of the curved printing table.

According to one embodiment, when the table returns to the gripper alignment position after a printing sequence, the elongate element is tilted from its pivot point of attachment in the direction of table movement.

Therefore, when the gripper is placed in its alignment position, the table passes through that position a distance and the elongated 21 nodes are pivoted to extend in the direction of said radial line, thereby causing the gripper to move against the surface of the printing table. Grip the print material that has been raised and aligned.

can be inserted into the bar.

In addition to the delay means for the aforementioned delayed movement in the direction towards the stop position, it is preferred to accelerate the gripper when it moves from the stop means and to reduce the impact energy transferred from the printing table to the gripper.

The means comprises a fork-like roller fork device;
Preferably, this acts as a delay means and an acceleration means.

In this example, before the gripper reaches its final alignment stop position, a dual-purpose fork roller device interacts with the gripper and decelerates the gripper to zero over a short path of travel such that table movement causes gripper movement. It is preferable to accelerate the movement of the gripper from said rest position before polymerizing with the gripper, so that a small impact force is generated.

Advantages The main advantage of the silk screen printer of the present invention is that the gripper and print material can be placed in registration position relative to the printer chassis or other reference point without having to place the stencil, stencil frame and printing table in registration position. can be placed in
This means that the limited kinetic energy of the gripper can be overcome. During the printing sequence, the stencil and printing material are aligned with each other, with the stencil first being placed in alignment relative to the gripper and the printing material, and then the printing material being printed.

Attach the gripper to an attachment that can move horizontally along the printing table, place the gripper in a preset alignment position relative to the printer chassis, and ensure that the large mass delay state is at the stop position of the stencil and printing table. affect,
The advantages described above are achieved by being able to grip precisely positioned print material regardless of the position of the stencil, even if its stop position is imprecise.

Another advantage is that before the printing table overlaps the gripper, the gripper is first accelerated from its alignment position, thereby reducing the transmission of impact energy.

The main features of the silk screen printer of this invention are described in the characterizing part of the first claim.

The present invention will be described in detail below.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Figure 1 shows a silk screen printer (1) having a curved printing table (2) with a cylindrical printing surface (2a). This printer is for printing on print material (3). This printer has a stencil (4) mounted in a stencil frame (5) in the usual manner.

In Figure 1, the front edge (3a) of the printing material (3) is connected to the printing surface (2a) of the cylinder or drum.
located close to alignment devices mounted on both sides of the Mounted near the center of the alignment device is a presser device (6) that aligns the front edge (3a) of the thin printing material with the printing surface (2).
a).

The general construction and operation of this printer is described in the aforementioned British Patent No. 1,467,910.

The stencil frame (5) and the stencil are secured by a rack device (not shown) placed on one side (5a) of the stencil frame (5) and a pinion (not shown) placed along the end face of the printing cylinder (2). (
4) moves back and forth in direct response to the rotational movement of the printing cylinder.

During the printing sequence, the printing table moves to the right, as indicated by the arrow in Figure 1, and the frame (5) with the stencil (4)
also moves to the right.

A squeegee device (7) is mounted and fixed on the chassis of the printer and interacts with the stencil (4) to remove the printing paste (not shown) provided on the stencil.
through the hole in the stencil and the print material underneath (3
) up and down.

Interacting with the leading or front edge (3a) of the printing material are two grippers. Each gripper is provided with gripping fingers (not shown in FIG. 1), which are mounted in the printing surface (2a) of the cylindrical printing table.

As mentioned above, the squeegee device (7) presses the stencil (4) onto the printing material (3) and the printing surface (2a) in a known manner, thereby compressing the printing material (3) located between the printing table and the stencil. ) The print is transferred to During the entire printing sequence, or at least a part thereof, the printing table (2a) interacts with two grippers, thereby controlling the leading edge (
3a) is retained.

The method of operating the squeegee device (7) and the frame (5) and the operation of the printer are generally known and, for the sake of convenience, will not be described in detail.

However, during the printing sequence, when the squeegee device descends and the print material is pulled to the right by the gripper and moves, the stencil is pressed against the print material at the uppermost point of the printing surface (2a) and held in that position. It should be understood that

2 and 3, a silk screen printer according to the invention is shown, in which one of the two grippers (8) is mounted along the printing surface (2a) of the printing table (2). can be moved horizontally along an arcuate path by the same distance.

It will be appreciated that different auxiliary devices can be used to move the gripper (8) horizontally along the -part of the printing surface (2a) of the printing table.

Thus, during a printing sequence, the gripper (8) is configured to be displaced over a short distance along the printing surface (2a) in a direction corresponding to the longitudinal extension of the stencil frame, i.e. in the direction of movement of said frame. It is something.

Figure 2 shows the leading edge (3a) of the material placed in registration position with respect to the printer chassis (10).

As indicated by the arrow in Figure 2, the gripper (
8) in the gripper alignment position, i.e. the surface (11) of the gripper is in the first
moving towards a position in contact with the surface (12) of the stopper means (13), the means (13)
) is fixed for

During the final movement (delayed movement) of the gripper (8) and the printing table (2), the surface (1) of the gripper (8)
4) is in contact with the surface (15) of the printing surface (2a), which causes the gripper to move onto the printing table (2a).
) and a stencil frame (5) having a stencil (4).

As shown in FIG. 3, when the printing table moves further to the left, the gripper 7 comes into contact with the first stop means (13) and stops. The gripping fingers (8a) of the gripper (8) then come into gripping engagement with the leading edge (3a) of the printing material (3).

In this position the gripper is aligned with the chassis (10), but not with the printing surface (2a) and the stencil (4), which elements are moved further to the left, as is clear from the drawing. Placed.

The surface of the printing table (15) is the gripper (8)
spaced apart from the surface (14) of. In reality, this distance may be greater than the distance shown in the drawing.

Although in Figure 3 the gripper (8) is shown interacting with the first stop means arranged on the chassis (10), it will be understood that other suitable reference points may alternatively be selected. There will be. 2 and 3, the stencil frame and printing surface (2a) are moved further to the left beyond the gripper alignment position without changing the position of the gripper (8) relative to the stop means (13). It can be moved.

Therefore, the printing table (2) and the stencil frame can be moved freely beyond the gripper alignment position without compromising the desired precise alignment of the gripper (8), and the frame (5) and the printing Table (2) can be stopped. The stop means (13) causes the gripper to move against the chassis (
10), which is independent of the stopping position of the table (2) and frame (5) (stencil (4)).

If the frame can be moved further to the left than the position shown in FIG. ) and the position of the printer chassis (10).

The gripper (8) has a plurality of anvil surfaces (8b) and a plurality of fingers (8a) that can be raised and lowered, and in the alignment position shown in FIG.
This firmly grips the leading edge (3a) of the printing material (3).

The gripper (8), printing material (3), printing table (2), stencil (4) and stencil frame (5) are moved from the position shown in Figure 3, the printing table and stencil are moved back and the printing material is printed. When the stencil is applied, the stencil is first moved relative to the gripper (8) and the printing material (3), and the surface (
14), (15) come into contact with each other, thereby forming a second stop means, with which the gripper (8) engages, after which the stencil is aligned relative to the gripper (8). Printing is started with the gripper (8), printing material (3), stencil (4) and stencil frame (5) aligned with each other.

Adjust the position of the first stop means (13) and gripper (
To adjust the alignment position of 8), an externally threaded pin is provided which interacts with the internally threaded sleeve. For convenience, pins and sleeves are not shown.

Therefore, the printing table (2) and the stencil frame (5) can be moved slightly beyond the alignment position of the gripper (8), and the next printing sequence, which has been aligned to the exact position by other means The print material (3) can be gripped.

As mentioned above, the adjustable stopper (13
) the alignment position of the gripper (8) can be adjusted. Preferably, this regulation is maintained over multiple printing sequences.

To clarify the technical concept of this invention, in this type of printer, the stencil frame and the stencil move back and forth in response to the back and forth movement of a cylindrical printing table, and this movement increases the speed of printing at a typical printing speed. It should be understood that the

When a considerable mass oscillates, a considerable amount of kinetic energy is generated,
It is clear that it is difficult to stop the stencil frame and the cylindrical printing table in exactly the same final position regardless of the printing speed.

Therefore, irrespective of the orientation of the stencil and printing table in said final position, only the printing material is aligned with respect to the gripper only, and the large swinging mass causes inaccuracies in the stopping position of the printing table and the stencil frame with the stencil. It is preferable that the

Therefore, according to the invention, the gripper (8) is mounted so as to be freely rotatable on the printing table, and when in the printing position, i.e. the return position, the gripper (8) is attached to the printing table (
When the gripper (8) is pressed against the stopper (2) and moved to the left in Fig. 1, the gripper (8) is pushed against the printer chassis (10).
The first stop (13) fixed to grips the printing material (3) in this alignment position, and the frame (5) and the printing table (2) can be moved further. The gripper (8) is free to rotate and remains in its alignment position.

During the printing sequence, the frame (5) and stencil (4) are returned in the opposite direction to that in Figure 3, and the printing table (and stencil (4)
A relative movement occurs between the gripper (8) and the frame (5), and this relative movement causes the gripper (8) to
are placed in precise alignment relative to the frame (5) and the stencil (4), and the second stop means (14)
), (15) causes the gripper to follow the movement of the stencil (4) and the printing table (2).

Thereafter, in gripping the printing material (3), when moved in the opposite direction shown in FIGS. 2 and 3, the frame (5) and the printing table (2)
Regardless of the relative stop position of the gripper (8), the stop (13), which absorbs only a small amount of energy, allows the gripper (8) to be placed in an alignment position with respect to the chassis (10) of the printer.

Before the actual printing sequence begins, the rotation of the cylindrical printing table (2) first moves the gripper (8) between the frame (5) and the stencil (
4) and then placed in the relevant alignment position (8), the print material (
3), frame (5) and stencil (4) make up the actual printing sequence.

For convenience, identical parts have been designated by the same reference numerals in FIGS. 1, 2, and 3; however, some parts have been omitted from FIGS. 2 and 3.

The displacement damping device acting as bar means (13) may be modified to form a fixed final position (first stop) for the gripper (8). In this case, the gripper (8) is pressed against the stopper by the spring force of the spring (16).

In FIG. 3, the front end of the gripper (8), which grips the leading edge portion of the print material, is slightly raised in the alignment position of the gripper.

As is clear from FIGS. 2 and 3, the gripper (8
), the gripping means (8a) (8b) of the elongated element (
an elongated element (20) located on the outer end of the elongated element (20);
is rotatably attached at the other end.

The elongated elements form a curved printing table (
2) extending in a direction related to the radial line (21) of the element (20) and the outer end of the element (20) and the gripping means (8a) (8h)
is placed on one side of its radius line, and its pivot mounting is at the point (
20a) is located on the opposite side of said radial line.

The angle therebetween is indicated by reference numeral (a) in FIG.

For rotational mounting, the point (20a) is placed at a distance (b) from the center of rotation (2゛) of the cylindrical printing table (2), and this distance is 15-50% of the length of the radial line. , is preferably approximately 30%.

After the completion of the printing sequence, when the table returns to the alignment position of the gripper (8) and moves beyond it, the elongated element (20) moves to the pivot point (20a
) at a small angle (a) in the direction of movement of the table (2).

When the gripper (8) is pressed against the stop (13) and placed in its registration position and the printing table passes through that position, the elongated element (20)
but its lower pivoting attachment rotates around the point (20a) and extends further in the direction of the radial line (21), its angle (a) decreasing. In particular, as shown in FIG.
2a) is lifted above.

When the printing sequence is started, the gripper returns to the position shown in FIG.

The dashed line in Figure 3 shows that the gripper (8) is connected to the stopper (13
) is shown in the position of point (20a).

2 and 3 are enlarged views of the auxiliary device (30), which decelerates the movement of the gripper in the direction towards the stop position and accelerates the movement of the gripper away from said stop position. In the embodiment shown in the figures, this device consists of a fork-shaped roller device.

The fork-like device has teeth, i.e. legs (31), (32)
, and before the gripper (8) reaches its alignment stop position, the bin (33) on the gripper (8) touches the leg (31).
), (32).

The forked roller arrangement (30) is fixed to the chassis (10) and is rotatable about an axis (34) associated with the chassis.

A rotational movement of the forked roller arrangement (30) allows the gripper to be moved to the left in the drawing in a known manner.

When the forked rollers (30) respond to the movement of the gripper (8) and retard said gripper, the gripper does not interact with the table (2) and the two surfaces (14), (15)
) increases.

A retardation force acting on the printing table (2) places the gripper in this position and pushes it towards this position.

When the gripper (8) is placed in the alignment position shown in FIG. 3, the forked roller device (30) rotates to the position shown in FIG.

When the printing sequence is started, the printing table is accelerated to the right in the drawing, and at the same time the fork-like roller device (30) moves in the direction of the arrow, which movement causes the gripper (8) to move to the right.

Therefore the surface (15) of the printing table (2)
The large impact forces that occur when the gripper (8) collides with the surface (14) of the gripper (8) are reduced.

The moving speed of the fork-like roller device (30) is selected, and the moving speed of the gripper (8) is two (14) and (15).
By ensuring that the speed of movement of the printing table is completely or substantially completely matched to the speed of the printing table upon contact, impact forces can be greatly reduced.

In addition to the above-mentioned embodiments, various modifications of the present invention can be considered.

[Brief explanation of the drawing]

1 is a perspective view of a known silk screen printer having gripper means mounted on a cylindrical reciprocating printing table; FIG. 2 shows the gripper and fork-like roller device in an unregistered position; FIG. 3 is a side view of the apparatus showing the gripper in the registration position and the forked roller arrangement in the interaction position. Silita Screen Printer Printing Table Printing Materials Stencil Stencil Frame Squeegee Device Grisova Procedure Amendment July 4, 1989 2. Title of the Invention 3. Person Making the Amendment Relationship with the Case Silk Screen Printer

Claims (15)

[Claims] (1) a printing table (2) suitable for printing on a printing material (3); a stencil frame (5) having a stencil (4) and arranged above the printing table (2); a squeegee device (7) for pressing said stencil against said printing table and transferring a print to a printing material (3) arranged between said printing table and said stencil (4); A silk screen printer (1) comprising a gripper (8) for gripping a material at its leading edge in the direction of movement, the gripper (8)
) is configured to be movable with respect to the printing table (2) in a direction corresponding to the longitudinal extension of the printing table (2), and regardless of the stop position of the printing table, the alignment stop position is movable. a gripper (8) is fixedly associated with the first stop;
A silk screen printer, wherein the table passes through a stop position of the gripper. (2) Item (1) characterized in that spring means (16) are provided for pressing the gripper (8) against the stopper (12), and means are provided for adjusting the position of the stopper. A printer according to the claims. (3) The printer according to claim (1), wherein the first stoppers (12) and (13) are mounted and fixed on the chassis or stand of the printer. (4) The printing table (2) and the stencil frame are configured to move beyond the position where only the gripper (8) is placed in the alignment position. ) or the printer according to claim (3). (5) The stoppers (12) and (13) are composed of movable damping means having a constant final position.
) A printer according to the claims. (6) The printer according to item (5), wherein the stopper comprises a hydraulic device or the like. (7) having a cylindrical printing table (2);
when the gripper is placed in the alignment position;
2. The printer according to claim 1, wherein the front end of the gripper for gripping and holding the printing material is slightly raised. (8) The gripper (8) has an elongated element (20)
Printer according to claim 7, characterized in that the elongated element (20) is rotatably mounted at its other end (20a). (9) said elongated element (20) extends in the direction of a radial line of the curved printing table (2), and the outer end of said element and said gripper (8) are arranged on one side of said radial line, and the rotation thereof Item (8), characterized in that the attachment point (20a) is located on the other side of the radius line.
A printer according to the claims. (10) The printer according to claim (9), wherein the rotation point (20a) is arranged at a distance from the rotation center (2') of the curved printing table (2). (11) After the printing sequence, when the printing table returns to and passes the gripper alignment position, the elongated element (20) moves from the pivot point (20a) to the printing table (2).
The printer according to claim (8) or (9), characterized in that the printer is inclined in the direction of movement of the printer. (12) When the gripper (8) is placed in an alignment position and the printing table passes through that position, the elongate element (20) is pivoted to extend in the direction of the radial line, thereby causing the gripper to (8
) is lifted above the surface (2a) of the printing table (2).
) A printer according to the claims. (13) Means are provided for interacting with the gripper (8) and for slowing the movement of the gripper towards the stop means and accelerating the gripper away from the stop means. A printer according to claim (1). (14) The printer according to claim (13), wherein the means comprises a fork-shaped roller device. (15) before said gripper is placed in its alignment stop position, said means interacts with said gripper, said gripper is decelerated over a short path of travel, and before said printing table catches up with said gripper, said means interacts with said gripper; The printer according to claim (13) or (14), wherein the gripper is accelerated in a direction away from the stop position.