A film sheet forming apparatus

Abstract

This utility model provides a film sheet forming device, including a die-cutting section and a finished product / waste separation section. The die-cutting section includes a die-cutting power unit, an adjusting power unit, and an upper die base and a lower die base that cooperate with each other, all mounted on a machine base. The upper die base is connected to the die-cutting power unit and is connected to the machine base through the die-cutting power unit. The lower die base includes an upper wedge block and a lower wedge block that are joined together along an inclined surface. The lower wedge block has several radially penetrating adjusting elongated holes. The machine base has several penetrating mounting holes, each equipped with a mounting sleeve. A connecting rod at the bottom of the upper wedge block moves downwards, passing through the adjusting elongated holes and the mounting sleeves in sequence, and extends to the bottom of the machine base. The adjusting power unit is located on one side of the lower die base and is connected to the lower wedge block to drive the lower wedge block to move horizontally. Compared with the prior art, the film sheet forming device provided by this utility model can achieve fine adjustment of the distance between the upper and lower die bases of the die-cutting section, adapting to film materials of different thicknesses.

Description

Technical Field

[0001] This utility model relates to the field of sheet forming machine manufacturing technology, and in particular to a thin film sheet forming device. Background Technology

[0002] Currently, the spacing between the upper and lower die holders in film sheet die-cutting equipment is generally adjusted by using a motor-driven device to control the upper or lower die holder to move directly up and down in the vertical direction. This adjusts the spacing between the die-cutting cutter at the bottom of the upper die holder and the lower die holder to accommodate film materials of different thicknesses. However, this adjustment method, which uses a motor to drive the upper or lower die holder to move directly up and down in the vertical direction, is limited by the output characteristics of the motor itself. It is more suitable for coarse adjustments of the spacing between the upper and lower die holders, but it is difficult to accurately achieve fine adjustments of the spacing, especially for lengths where the spacing adjustment range is in the single millimeter or less. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a thin film sheet forming device that can achieve fine adjustment of the distance between the upper and lower mold bases.

[0004] This utility model achieves the above objectives as follows:

[0005] This utility model discloses a film sheet forming device, comprising a die-cutting section and a finished product / waste separation section. The die-cutting section includes a die-cutting power unit, an adjusting power unit, and an upper die base and a lower die base that cooperate with each other, all mounted on a machine base. The upper die base is equipped with a die-cutting cutter and is connected to the die-cutting power unit, which in turn is connected to the machine base. The lower die base includes an upper wedge block and a lower wedge block that are joined together along an inclined surface. The lower wedge block has several radially penetrating adjusting elongated holes. The machine base has several penetrating mounting holes, each equipped with a mounting sleeve. A connecting rod at the bottom of the upper wedge block moves downwards, passing through the adjusting elongated holes and the mounting sleeves, and extends to the bottom of the machine base. The adjusting power unit is located on one side of the lower die base and is connected to the lower wedge block to drive the lower wedge block to move horizontally.

[0006] Furthermore, a limit nut is movably fitted at the lower end of the connecting rod, and a first buffer spring is also fitted over the connecting rod, the first buffer spring being located between the bottom of the base and the limit nut.

[0007] Furthermore, the output linkage of the die-cutting power unit moves through the machine base and is fixedly connected to the upper die base. The output linkage is also fitted with a second buffer spring, which is located between the upper die base and the machine base. The die-cutting cutter is located at the bottom of the upper die base. An adjustment measuring plate is also installed at the bottom of the upper die base. The adjustment measuring plate is connected to several support blocks by screws. The several support blocks cooperate with each other to install and support the die-cutting cutter.

[0008] Furthermore, the adjusting power unit is a servo motor, and the base is also equipped with a winding section.

[0009] Furthermore, the finished product waste separation section includes a film recycling mechanism and a sheet finished product collection mechanism. The film recycling mechanism is located between the die-cutting section and the sheet finished product collection mechanism. The film recycling mechanism includes a recycling power unit, a first active roller and several first driven rollers movably connected to the machine base, and a first belt tensioned and connected to the first active roller and several first driven rollers. One end of the first active roller passes through the machine base and is connected to the output end of the recycling power unit. After the first belt is tensioned and connected to the first active roller and several first driven rollers, it forms a supporting surface for supporting the film.

[0010] Furthermore, the film recycling mechanism also includes a pressure roller movably connected to the base. The pressure roller is located at the rear end of the film recycling mechanism and movably abuts against the first belt to the first drive roller. The surface of the first belt is covered with dimples. The first drive roller and the plurality of first driven rollers tension the first belt into a structure with a side profile resembling an inverted trapezoid.

[0011] Furthermore, the base is also provided with an adjustment groove. The two ends of the second driven roller located on the lower front end of the film recycling mechanism pass through the adjustment groove and are fixed with retaining rings. The retaining rings are provided with connecting screw holes. The outer side of the base is connected with a mounting protrusion. The mounting protrusion is provided with a through hole. The screw passes through the through hole and connects with the connecting screw hole.

[0012] Furthermore, the finished waste separation section also includes a separation auxiliary component, which includes a mounting frame and several auxiliary rubber block adjustment seats. The mounting frame is connected to the upper wedge block. The mounting frame is provided with a guide crossbar and a transition support surface. The guide crossbar is located below the transition support surface. The transition support surface is adjacent to the upper wedge block and the support surface. The auxiliary rubber block adjustment seat is provided with a locking groove that interlocks with the guide crossbar. An adjusting screw is connected through a locking screw hole at the lower part of the locking groove. The adjusting screw passes through the locking screw hole and movably abuts against the guide crossbar. A rubber block is installed on the auxiliary rubber block adjustment seat. One end of the rubber block passes through the gap between the transition support surface and the support surface and abuts against the support surface.

[0013] Furthermore, the sheet material collection mechanism includes a collection power unit, a second active roller and several second driven rollers movably connected to the machine base, and a second belt. The second belt is tensioned and connected to the second active roller and the several second driven rollers. One end of the second active roller passes through the machine base and is connected to the output end of the collection power unit.

[0014] Furthermore, the sheet material collection mechanism also includes a sheet material pressure roller located above the second belt. The sheet material pressure roller has slots at both ends. Adjustment frames connected to the machine base are installed on both sides of the second belt. The adjustment frames have several slots that cooperate with the slots of the sheet material pressure roller.

[0015] The beneficial effects of this utility model are:

[0016] This utility model provides a film sheet forming device. The lower die base of the die-cutting section is designed as a structure formed by upper and lower wedge blocks joined together along an inclined surface. The lower wedge block is connected to an adjusting power unit. Several adjusting elongated holes are formed on the lower wedge block, and several through-holes corresponding to these adjusting elongated holes are formed on the machine base. An mounting sleeve is provided at each mounting hole, allowing the connecting rod at the bottom of the upper wedge block to move downwards, passing through the adjusting elongated holes and the mounting sleeves, and extending out from the bottom of the machine base. This movably connects the upper and lower wedge blocks to the machine base. The upper wedge block, under the influence of gravity, presses against the inclined surface of the lower wedge block, thus achieving a joint with it. When the adjusting power unit drives the lower wedge block to move horizontally relative to the machine base and the upper wedge block, in the horizontal direction, the connecting rod of the upper wedge block is restricted by the mounting sleeve and cannot move horizontally with the lower wedge block. In the vertical direction, the upper wedge block presses against the inclined surface of the lower wedge block under the action of gravity and moves slowly up and down along the inclined surface of the lower wedge block. The characteristic of this adjustment method is that the vertical movement distance and speed of the upper wedge block are always less than the horizontal movement distance and speed of the lower wedge block. Therefore, by adjusting the power unit, the lower wedge block can be controlled to move slowly horizontally, thereby controlling the slight vertical movement of the upper wedge block and realizing the fine adjustment of the distance between the upper and lower mold bases. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 This is a schematic diagram of the overall structure of a thin film sheet forming device according to one embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the back structure of a thin film sheet forming device according to one embodiment of the present invention;

[0020] Figure 3 for Figure 2 Enlarged diagram of A in the middle;

[0021] Figure 4 This is a schematic diagram of the rear structure of the die-cutting part in one embodiment of the present invention;

[0022] Figure 5 for Figure 4 Enlarged diagram of B in the diagram;

[0023] Figure 6 This is a schematic diagram of the front structure of the die-cutting part in one embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram showing the connection between the lower wedge block and the upper wedge block in one embodiment of the present invention.

[0025] Figure 8 This is a schematic diagram showing the connection between the base and the upper wedge block in one embodiment of the present invention;

[0026] Figure 9 This is a schematic diagram of the internal structure of the finished product waste separation section in one embodiment of the present invention;

[0027] Figure 10 This is a schematic diagram of the overall structure of the finished product and waste material separation section in one embodiment of the present invention;

[0028] Figure 11 for Figure 10 Enlarged diagram of C in the middle;

[0029] Figure 12 for Figure 10 An enlarged schematic diagram of D in the diagram.

[0030] In the diagram, 1 is the die-cutting section, 2 is the finished product / waste separation section, 3 is the base, 11 is the die-cutting power unit, 12 is the adjusting power unit, 13 is the upper die base, 14 is the lower die base, 141 is the upper wedge block, 142 is the lower wedge block, 31 is the mounting sleeve, 1411 is the connecting rod, 1421 is the adjusting elongated hole, 41 is the limit nut, 42 is the first buffer spring, 111 is the output connecting rod, 5 is the second buffer spring, 131 is the adjusting measuring plate, 132 is the support block, 1311 is the positioning screw hole, 1321 is the positioning connecting hole, 6 is the winding section, 21 is the film recycling mechanism, 22 is the sheet finished product collection mechanism, and 211 is the recycling power unit. 212 First driving roller, 213 First driven roller, 214 First belt, 2141 Support surface, 215 Pressure roller, 32 Adjusting groove, 2131 Snap ring, 21311 Connecting screw hole, 33 Mounting protrusion, 331 Through hole, 23 Mounting bracket, 24 Auxiliary rubber block adjusting seat, 231 Guide crossbar, 232 Transition support surface, 241 Snap groove, 242 Adjusting screw, 221 Collecting power unit, 222 Second driving roller, 223 Second driven roller, 224 Second belt, 225 Sheet pressure roller, 226 Adjusting bracket, 2251 Bayonet, 2261 Slot. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0032] Figures 1-8 This invention illustrates the specific structure of a film sheet forming apparatus according to an embodiment of the present invention. The film sheet forming apparatus includes a die-cutting section 1 and a finished product / waste separation section 2. The die-cutting section 1 includes a die-cutting power unit 11, an adjusting power unit 12, and an upper die base 13 and a lower die base 14 that cooperate with each other, all mounted on a machine base 3. The upper die base 13 is equipped with a die-cutting cutter and is connected to the die-cutting power unit 1, and is also connected to the machine base 3 through the die-cutting power unit 1. The lower die base 14 includes upper wedge blocks 1 that are joined together along an inclined surface. 41. Lower wedge block 142, the lower wedge block 142 has several radially penetrating adjustment elongated holes 1421, the machine base 3 has several penetrating mounting holes, each mounting hole is provided with a mounting sleeve 31, the connecting rod 1411 at the bottom of the upper wedge block 141 moves downward sequentially through the adjustment elongated holes 1421 and the mounting sleeve 31, and extends to the bottom of the machine base 3, the adjusting power unit 12 is located on one side of the lower mold base 14 and connected to the lower wedge block 142, so as to drive the lower wedge block 142 to move horizontally.

[0033] The present invention provides a film sheet forming device, wherein the lower die base 14 of the die-cutting section 1 is designed as a structure formed by the upper wedge block 141 and the lower wedge block 142 being assembled together along an inclined surface, the lower wedge block 142 is connected to the adjusting power unit 12, and a plurality of adjusting elongated holes 1421 are formed on the lower wedge block 142, and the machine base 3 is provided with corresponding and cooperating holes 1421. The upper wedge 141 has several through mounting holes, and a mounting sleeve 31 is provided at each mounting hole. This allows the connecting rod 1411 at the bottom of the upper wedge 141 to move downwards, passing through the adjusting elongated hole 1421 and the mounting sleeve 31 in sequence, and extending out of the bottom of the base 3. This movably connects the upper wedge 141 to the lower wedge 142 and the base 3, while the upper wedge 141 is pressed against the inclined surface of the lower wedge 142 by gravity. When the adjusting power unit 12 drives the lower wedge block 142 to move horizontally relative to the base 3 and the upper wedge block 141, in the horizontal direction, the connecting rod 1411 of the upper wedge block 141 is restricted by the mounting sleeve 31 and cannot move horizontally with the lower wedge block 142. In the vertical direction, the upper wedge block 141 presses against the inclined surface of the lower wedge block 142 under the action of gravity. The upper wedge block 141 moves slowly up and down along the inclined surface of the lower wedge block 142. The characteristic of this adjustment method is that the vertical movement distance and speed of the upper wedge block 141 are always less than the horizontal movement distance and speed of the lower wedge block 142. Therefore, the lower wedge block 142 can be slowly moved horizontally by the adjustment power unit 12, thereby controlling the slight vertical movement of the upper wedge block 141 and realizing the fine adjustment of the distance between the upper and lower mold bases.

[0034] Furthermore, in this embodiment, as Figure 6 As shown, the lower end of the connecting rod 1411 is movably fitted with a limiting nut 41, and the connecting rod 1411 is also fitted with a first buffer spring 42, which is located between the bottom of the base 3 and the limiting nut 41.

[0035] Furthermore, in this embodiment, as Figure 2 and Figure 3As shown, the output connecting rod 111 of the die-cutting power unit 11 moves through the machine base 3 and is fixedly connected to the upper die base 13. The output connecting rod 111 is also sleeved with a second buffer spring 5, which is located between the upper die base 13 and the machine base 3. The die-cutting cutter is located at the bottom of the upper die base 13. An adjusting measuring plate 131 is also installed at the bottom of the upper die base 13. The adjusting measuring plate 131 is connected to several supporting blocks 132 by screws. The several supporting blocks 132 cooperate with each other to install and support the die-cutting cutter. More specifically, the adjusting measuring plate 131 has several positioning screw holes 1311, and the connecting part of the supporting block 132 has a positioning connecting hole 1321. The positioning connecting hole 1321 and the positioning screw hole 1311 are connected by a connecting screw.

[0036] Furthermore, in this embodiment, the adjusting power unit 12 is a servo motor, such as... Figure 2 As shown, the base 3 is also equipped with a winding section 6.

[0037] Furthermore, in this embodiment, as Figures 9-12 As shown, the finished product waste separation section 2 includes a film recycling mechanism 21 and a sheet finished product collection mechanism 22. The film recycling mechanism 21 is located between the die-cutting section 1 and the sheet finished product collection mechanism 22. The film recycling mechanism 21 includes a recycling power unit 211, a first active roller 212 and a plurality of first driven rollers 213 movably connected to the machine base, and a first belt 214 tensioned and connected to the first active roller 212 and the plurality of first driven rollers 213. One end of the first active roller 212 passes through the machine base 3 and is connected to the output end of the recycling power unit 211. After the first belt 214 is tensioned and connected to the first active roller 212 and the plurality of first driven rollers 213, it forms a supporting surface 2141 for supporting the film.

[0038] Furthermore, in this embodiment, as Figure 9 As shown, the film recycling mechanism 21 also includes a pressure roller 215 movably connected to the base 3. The pressure roller 215 is located at the rear end of the film recycling mechanism 21 and movably abuts against the first belt 214 to the first drive roller 212. The surface of the first belt 214 is covered with dimples. The first drive roller 212 and the plurality of first driven rollers 213 tension the first belt 214 into a structure with a side shape similar to an inverted trapezoid.

[0039] Furthermore, in this embodiment, as Figure 10 and Figure 12As shown, the base 3 is also provided with an adjustment groove 32. The two ends of the second driven roller 223 located on the lower front end of the film recycling mechanism 21 pass through the adjustment groove 32 and are fixed with retaining rings 2131. The retaining rings 2131 have connecting screw holes 21311. The outer side of the base 3 is connected with a mounting protrusion 33. The mounting protrusion has a through hole 331. The screw passes through the through hole 331 and connects to the connecting screw hole 21311 to lock the first driven roller 213. When the screw is separated from the connecting screw hole 21311, the first driven roller 213 is in a free state and can move up and down along the adjustment groove 32 to adjust the tension of the first belt 214.

[0040] Furthermore, in this embodiment, as Figure 1 , Figure 4 and Figure 5 As shown, the finished waste separation section 2 further includes a separation auxiliary component, which includes a mounting frame 23 and several auxiliary adhesive block adjustment seats 24. The mounting frame 23 is connected to the upper wedge block 141. The mounting frame 23 is provided with a guide crossbar 231 and a transition support surface 232. The guide crossbar 231 is located below the transition support surface 232. The transition support surface 232 is adjacent to the upper wedge block 141 and the support surface 2141. The auxiliary adhesive block adjustment seats 24 are provided with a locking groove 241 that interlocks with the guide crossbar 231. A locking screw hole at the lower part of the locking groove 241 is connected to an adjusting screw 242. 42 passes through the locking screw hole and movably abuts against the guide crossbar 231. The auxiliary rubber block adjustment seat 24 is equipped with a rubber block (not shown in the figure). One end of the rubber block passes through the gap between the transition support surface 232 and the support surface 2141 and abuts against the support surface 2141. After die-cutting, the finished sheet and waste film are output from the die-cutting part 1 under the action of external force, pass through the transition support surface 232 and are sent to the support surface 2141. When the sheet and waste film pass through the support surface 2141, the rubber block rubs against the sheet and waste film, peeling the sheet off the waste film to facilitate the subsequent separation of the finished sheet and waste film.

[0041] Furthermore, in this embodiment, as Figure 9 and Figure 10 As shown, the sheet material collection mechanism 22 includes a collection power unit 221, a second active roller 222 movably connected to the machine base 3, a plurality of second driven rollers 223, and a second belt 224. The second belt 224 is tensioned and connected to the second active roller 222 and the plurality of second driven rollers 223. One end of the second active roller 222 passes through the machine base 3 and is connected to the output end of the collection power unit 221.

[0042] Furthermore, to accommodate finished sheet products of different sizes, in this embodiment, such as Figures 9-11 As shown, the sheet material collection mechanism 22 also includes a sheet material pressure roller 225 disposed above the second belt 224. The sheet material pressure roller 225 has slots 2251 at both ends. Adjustment frames 226 connected to the machine base 3 are installed on both sides of the second belt 224. The adjustment frames 226 are provided with a plurality of slots 2261 that cooperate with the slots 2251 of the sheet material pressure roller 225.

[0043] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made with respect to the claims and scope of the present utility model should fall within the scope of the claims of the present utility model.

Claims

1. A film sheet forming apparatus comprising a die-cutting section (1) and a finished product-waste material separating section (2), characterized by: The die-cutting section (1) includes a die-cutting power unit (11), an adjusting power unit (12), and an upper die base (13) and a lower die base (14) that cooperate with each other, all mounted on the machine base (3). The upper die base (13) is equipped with a die-cutting tool and is connected to the die-cutting power unit (11) and the machine base (3) through the die-cutting power unit (11). The lower die base (14) includes an upper wedge block (141) and a lower wedge block (142) that are joined together along an inclined surface. The lower wedge block (142) has an opening. A number of radially penetrating adjustment elongated holes (1421) are provided. The base (3) is provided with a number of penetrating mounting holes. Each mounting hole is provided with a mounting sleeve (31). The connecting rod (1411) at the bottom of the upper wedge block (141) moves downward through the adjustment elongated holes (1421) and the mounting sleeve (31) in sequence, and extends to the bottom of the base (3). The adjustment power unit (12) is located on one side of the lower mold base (14) and is connected to the lower wedge block (142) to drive the lower wedge block (142) to move horizontally.

2. A film sheet forming apparatus according to claim 1, characterized by: The lower end of the connecting rod (1411) is movably fitted with a limiting nut (41), and the connecting rod (1411) is also fitted with a first buffer spring (42), which is located between the bottom of the base (3) and the limiting nut (41).

3. The apparatus of claim 1 wherein: The output link (111) of the die-cutting power unit (11) moves through the machine base (3) and is fixedly connected to the upper die base (13). The output link (111) is also covered with a second buffer spring (5). The second buffer spring (5) is located between the upper die base (13) and the machine base (3). The die-cutting tool is located at the bottom of the upper die base (13). An adjustment measuring plate (131) is also installed at the bottom of the upper die base (13). The adjustment measuring plate (131) is connected to several support blocks (132) by screws. The several support blocks (132) cooperate with each other to install and support the die-cutting tool.

4. The apparatus of claim 1 wherein: The adjustment power unit (12) is a servo motor, and the base (3) is also equipped with a winding section (6).

5. The apparatus of claim 1 wherein: The finished product waste separation section includes a film recycling mechanism (21) and a sheet finished product collection mechanism (22). The film recycling mechanism (21) is located between the die-cutting section (1) and the sheet finished product collection mechanism (22). The film recycling mechanism (21) includes a recycling power unit (211), a first active roller (212) and a plurality of first driven rollers (213) movably connected to the machine base (3), and a first belt (214) tensioned and connected to the first active roller (212) and the plurality of first driven rollers (213). One end of the first active roller (212) passes through the machine base (3) and is connected to the output end of the recycling power unit (211). After the first belt (214) is tensioned and connected to the first active roller (212) and the plurality of first driven rollers (213), it forms a supporting surface (2141) for supporting the film.

6. The apparatus of claim 5, wherein: The film recycling mechanism (21) further includes a pressure roller (215) movably connected to the base (3). The pressure roller (215) is located at the rear end of the film recycling mechanism (21) and movably abuts against the first belt (214) to the first drive roller (212). The surface of the first belt (214) is covered with dimples. The first drive roller (212) and the plurality of first driven rollers (213) tension the first belt (214) into a structure with a side shape similar to an inverted trapezoid.

7. A film sheet forming apparatus according to claim 5 or 6, characterized by: The base (3) is also provided with an adjustment groove (32). The two ends of the second driven roller (223) located on the lower front end of the film recycling mechanism (21) pass through the adjustment groove (32) and are fixed with retaining rings (2131). The retaining rings (2131) are provided with connecting screw holes (21311). The base (3) is connected to an mounting protrusion (33). The mounting protrusion (33) is provided with a through hole (331). The screw passes through the through hole (331) and connects to the connecting screw hole (21311).

8. The apparatus of claim 7, wherein: The finished waste separation section (2) further includes a separation auxiliary component, which includes a mounting frame (23) and several auxiliary rubber block adjustment seats (24). The mounting frame (23) is connected to the upper wedge block (141). The mounting frame (23) is provided with a guide crossbar (231) and a transition support surface (232). The guide crossbar (231) is located below the transition support surface (232). The transition support surface (232) is adjacent to the upper wedge block (141) and the support surface (2141). The auxiliary rubber block adjustment seat (24) is provided with a locking groove (241) that engages with the guide crossbar (231). The locking screw hole at the bottom of the locking groove (241) is connected to an adjusting screw (242). The adjusting screw (242) passes through the locking screw hole and movably abuts against the guide crossbar (231). The auxiliary rubber block adjustment seat (24) is equipped with a rubber block. One end of the rubber block passes through the gap between the transition support surface (232) and the support surface (2141) and abuts against the support surface (2141).

9. The apparatus of claim 5 wherein: The sheet material collection mechanism (22) includes a collection power unit (221), a second active roller (222) movably connected to the machine base (3), a plurality of second driven rollers (223), and a second belt (224). The second belt (224) is tensioned and connected to the second active roller (222) and the plurality of second driven rollers (223). One end of the second active roller (222) passes through the machine base (3) and is connected to the output end of the collection power unit (221).

10. The apparatus of claim 9, wherein: The sheet material collection mechanism (22) further includes a sheet pressure roller (225) located above the second belt (224). The sheet pressure roller (225) has slots (2251) at both ends. Adjustment frames (226) connected to the machine base (3) are installed on both sides of the second belt (224). The adjustment frames (226) have several slots (2261) that cooperate with the slots (2251) of the sheet pressure roller (225).

Images