Four-roller printing composite device

Abstract

The utility model discloses a four-roller printing composite device, and belongs to the technical field of tissue production equipment. The printing compounding device comprises a rack, a printing compounding mechanism, a driving mechanism and an adjusting mechanism are arranged on the rack, and the printing compounding mechanism comprises two rubber rollers and two printing rollers; wherein the first rubber roller and the first printing roller are matched with each other, and the second rubber roller and the second printing roller are matched with each other, so that printing grains are pressed on respective single-layer tissues; the first printing roller and the second printing roller are matched with each other to press and compound the two tissues pressed with printing lines; the driving mechanism is used for driving the printing rollers of the printing and compounding mechanism to rotate; the adjusting mechanism is used for adjusting the roller distance between the two matched roller bodies. According to the utility model, the arrangement of the roller bodies is optimized, so that the printing and compounding operations of tissues can be completed by four roller bodies, and the cost and the space can be saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of paper towel production equipment, and more specifically relates to a four-roller printing composite device. Background Art

[0002] Paper towels are a necessity in people's daily life. Paper towels are usually made of two or more layers. Embossed composite paper products are widely favored by consumers because of their good water absorption and fluffiness.

[0003] The existing embossing device is mainly composed of an upper embossing rubber roller, an upper embossing steel roller, a lower embossing steel roller, a lower embossing rubber roller and two composite rollers. The upper embossing rubber roller and the upper embossing steel roller cooperate with each other to form a printed pattern on the surface of the base paper; the lower embossing steel roller and the lower embossing rubber roller cooperate with each other to form a printed pattern on the surface of another base paper; then the two base papers enter between the two composite rollers for composite to form an embossed composite tissue.

[0004] For example, in the application case CN211138321U, a non-glue embossing composite system is disclosed. In this application case, the first embossing roller group and the second embossing roller group emboss the two-way interlayer base paper fed in independently to form an interlayer texture pattern composed of a plurality of protrusions, and the two-way interlayer base paper after embossing is sandwiched between the two-way surface base paper fed in and stacked and sent to the edge embossing roller group for pressing treatment to combine the layers of base paper together, and the surface of the finished paper formed by the combination forms a plurality of edge texture patterns arranged in a matrix.

[0005] For another example, in the application case CN214938522U, a six-roller multi-faceted three-dimensional embossing system is disclosed. In this application, the first lower pattern roller and the second lower pattern roller are provided to emboss the bottom surface of the embossed material, the first upper pattern roller and the second upper pattern roller are provided to emboss the front surface of the embossed material, and the first composite roller and the second composite roller are provided to compositely emboss the embossed material.

[0006] Although the above application can realize the printing and compounding operation of paper towels, it uses a large number of rollers, generally 6 rollers, and the 6 rollers need to be equipped with corresponding accessories. This not only increases the cost of the equipment, but also makes the overall structure of the equipment larger, which is not conducive to space saving. Utility Model Content

[0007] 1. Problems to be solved

[0008] In view of the problem that the existing printing equipment uses a large number of rollers, which leads to high cost and large space occupation, the utility model provides a four-roller printing compound device. The utility model first prints by cooperating two printing rollers with their respective rubber rollers, and then presses and compounds by cooperating with two printing rollers, so that four rollers can complete the printing and compounding operations, thereby greatly reducing the number of rollers used, which is conducive to saving costs and space.

[0009] 2. Technical solution

[0010] In order to solve the above problems, the technical solution adopted by the utility model is as follows:

[0011] The utility model discloses a four-roller printing composite device, comprising a frame, wherein the frame comprises two side plates arranged opposite to each other, and a crossbeam arranged between the two side plates;

[0012] A printing composite mechanism is also provided between the two side plates, and the printing composite mechanism includes two rubber rollers and two printing rollers;

[0013] The first rubber roller and the first printing roller cooperate with each other, and the second rubber roller and the second printing roller cooperate with each other to press printed patterns on their respective single-layer tissues;

[0014] A pressing and compounding matching gap is formed between the first printing roller and the second printing roller, and the two roller bodies that match each other rotate in opposite directions;

[0015] A driving mechanism, wherein the driving mechanism is used to drive the printing roller of the printing composite mechanism to rotate;

[0016] And an adjusting mechanism, wherein the adjusting mechanism is used to adjust the roller distance between two roller bodies that cooperate with each other.

[0017] Furthermore, the adjustment mechanism includes a first adjustment component for driving the rubber roller, the first adjustment component includes a first rotating plate hinged on the inner wall of the side plate, and both ends of the rubber roller are rotatably arranged on the corresponding first rotating plate;

[0018] The first rotating plate swings under the drive of the first driving source to adjust the distance between the rubber roller and the corresponding printing roller.

[0019] Furthermore, connecting blocks are provided on both side ends of the side plate, one end of the first driving source is hinged to the connecting block, and the other end is hinged to the end of the first rotating plate extending to the outside of the side plate, so that the entire first driving source is located outside the side wall.

[0020] Furthermore, the adjustment mechanism also includes a second adjustment component for driving the printing roller, which includes a second rotating plate and a second driving source; wherein, at least one printing roller is connected to the second driving source through the second rotating plate, and the second rotating plate swings along the hinge point at its end under the drive of the second driving source; and the second rotating plate and the second driving source are located in an installation groove opened on the side panel.

[0021] Furthermore, the first driving source and the second driving source are oil cylinders or air cylinders, and the first driving source and / or the second driving source are connected to a gas-liquid booster.

[0022] Furthermore, the side plate is provided with a brush roller and / or a lubrication roller, wherein the brush roller is used to clean paper scraps on the printing roller, and a scrap collection box is provided below the brush roller;

[0023] The lubricating roller is provided with a felt for applying lubricating oil to the printing roller.

[0024] Furthermore, a protective plate is provided on the side plate, and the protective plate is located at the paper towel entrance of the rubber roller and the corresponding printing roller to form a shield, and a gap is left between the protective plate and the rubber roller for the paper towel to pass through.

[0025] Furthermore, the first rubber roller, the first printing roller, and the second printing roller are sequentially distributed along the conveying direction of the paper, and the central axes of the three rollers are located on the same horizontal plane.

[0026] Furthermore, the printing roller is provided with a compounding part, and the pressing surfaces of the pair of compounding parts located at the compounding position on the two printing rollers have at least partial areas corresponding to each other on the top, which are used for pressing and compounding the paper towel.

[0027] Furthermore, a gap between the top pressing surfaces of a pair of composite parts located at the composite position is 0.01-0.3 mm.

[0028] Furthermore, the pair of composite parts cooperate with each other, and the widths of the pressed surfaces are arranged to be larger and smaller.

[0029] Furthermore, the driving mechanism includes a driving motor, a first gear, and a second gear; wherein,

[0030] The driving motor is connected to the second printing roller, and the two printing rollers are meshed and driven by the first gear and the second gear;

[0031] At least one of the first gear and the second gear can be rotated and adjusted relative to the embossing roller connected to each other, so that when the two gears are meshed with each other, a pair of composite parts located at the composite position on the two embossing rollers at least partially correspond to each other.

[0032] 3. Beneficial effects

[0033] Compared with the prior art, the beneficial effects of the utility model are:

[0034] (1) The utility model is a four-roller printing and compounding device, which first presses printed patterns on the respective single-layer paper towels through the cooperation between the first printing roller and the first rubber roller, and the cooperation between the second printing roller and the second rubber roller; then, the two paper towels with printed patterns are pressed through the cooperation between the first printing roller and the second printing roller, so that they are interwoven with each other to form a non-glue compound; the utility model optimizes the arrangement of the rollers, so that four rollers can complete the printing and compounding operations of the paper towels, thereby greatly reducing the number of rollers and their accessories used, which is beneficial to saving costs and space.

[0035] (2) The utility model is a four-roller printing composite device, in which the spacing between the rubber roller and the printing roller, and between the two printing rollers are all designed to be adjustable. When manual paper feeding is required, the spacing between the rubber roller and the printing roller, and between the two printing rollers are adjusted to the "open" state, so that the paper towel can be more conveniently and quickly inserted into the corresponding roller group.

[0036] (3) The utility model provides a four-roller printing composite device, which can promptly clean the paper scraps adhering to the printing rollers through the setting of the brush rollers to ensure the printing effect; at the same time, a scrap collecting box is provided under the brush rollers to collect the paper scraps that fall after the brush rollers are cleaned to prevent secondary pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a structural schematic diagram of a four-roller printing composite device of the utility model;

[0038] Figure 2 It is a side view of a four-roller printing composite device of the utility model;

[0039] Figure 3 It is a structural schematic diagram of the printing composite mechanism in the utility model;

[0040] Figure 4 It is a schematic diagram of the connection between the driving mechanism and the printing roller of the utility model;

[0041] Figure 5 It is a schematic diagram of the assembly between the adjustment mechanism and the rubber roller in the utility model;

[0042] Figure 6 The utility model is a schematic diagram of the partial structure inside a four-roller printing composite device.

[0043] In the figure: 1, rack; 11, mounting slot;

[0044] 2. Printing composite mechanism; 21. First rubber roller; 22. Second rubber roller; 23. First printing roller; 24. Second printing roller;

[0045] 3. Driving mechanism; 31. Driving motor; 32. First gear; 33. Second gear;

[0046] 4. Adjustment mechanism; 41. First rotating plate; 42. First driving source; 43. Second rotating plate; 44. Second driving source; 45. Connection block; 46. Gas-liquid booster.

[0047] 5. Brush roller; 6. Lubrication roller; 7. Chip box; 8. Protective plate. DETAILED DESCRIPTION

[0048] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings.

[0049] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0050] The utility model is further described below in conjunction with specific embodiments.

[0051] Example 1

[0052] like Figure 1 , Figure 2 As shown, a four-roller printing composite device of this embodiment includes a frame 1 and a printing composite mechanism 2, a driving mechanism 3 and an adjusting mechanism 4 arranged on the frame 1.

[0053] The frame 1 serves as the installation base of the entire device, and includes two side panels that are arranged opposite to each other. The two side panels are connected by a plurality of cross beams, and a supporting cross plate is connected to the bottom of each side panel.

[0054] The printing composite mechanism 2 is used for printing and non-glue laminating of paper towels; the driving mechanism 3 is used for driving the printing roller of the printing composite mechanism 2 to rotate; and the adjusting mechanism 4 is used for adjusting the roller spacing between two roller bodies that cooperate with each other.

[0055] like Figure 3As shown, the printing composite mechanism 2 is arranged between two side plates. The printing composite mechanism 2 includes two rubber rollers and two printing rollers, and is between two roller bodies that cooperate with each other and rotate in opposite directions.

[0056] Wherein, the printing roller is provided with a compounding part, and a pair of compounding parts located at the compounding position on the two printing rollers have at least partial areas of the pressing surfaces on the top corresponding to each other, which are used for pressing and compounding the paper towel.

[0057] Specifically, the composite parts on the first rubber roller 21 and the first printing roller 23 cooperate with each other to press printed lines on one single-layer tissue paper. The composite parts on the second rubber roller 22 and the second printing roller 24 cooperate with each other to press printed lines on another single-layer tissue paper.

[0058] A pressing and compounding gap is formed between the first printing roller 23 and the second printing roller 24, and the compounding parts on the two printing rollers cooperate with each other at the compounding position, so that the two paper towels with printed patterns are intertwined with each other under the pressure of the compounding parts to form a non-gelatinized compound.

[0059] The above-mentioned compound position means that when the compound parts rotate to a certain position along with their respective printing rollers, the gap between a pair of compound parts located on different printing rollers is the smallest, and the paper towel is pressed and compounded at this position, which is the compound position.

[0060] Preferably, the gap between the top pressing surfaces of a pair of compounding parts located at the compounding position is 0.01-0.3 mm, so as to ensure that the two papers can be pressed tightly together and reduce the risk of the papers being torn.

[0061] In addition, in order to ensure that there is a larger tolerance space between the pair of composite parts that cooperate with each other, the widths of the pressing surfaces of the pair of composite parts that cooperate with each other are arranged to be larger and smaller.

[0062] like Figure 4 As shown, the driving mechanism 3 includes a driving motor 31, a first gear 32, and a second gear 33. The driving motor 31 is connected to one of the printing rollers, and the two printing rollers are meshed and driven through the first gear 32 and the second gear 33.

[0063] At least one of the first gear 32 and the second gear 33 can be rotated and adjusted relative to the embossing rollers connected thereto, so that when the two gears are meshed with each other, a pair of composite parts located at the composite position on the two embossing rollers at least partially correspond to each other, thereby realizing the pressing and compounding of the paper towel.

[0064] The adjustment mechanism 4 can be formed by a gear rack transmission, a screw transmission and other structures in the prior art, which will not be described in detail here.

[0065] Specifically in this embodiment, the composite part is a truncated cone-shaped protrusion. Of course, the specific shape of the composite part can also be replaced by other shapes, which are not listed here one by one.

[0066] The driving motor 31 is connected to one end of the second embossing roller 24, and the other end of the second embossing roller 24 is connected to the first gear 32. The second gear 33 is connected to the end of the first embossing roller 23, and the second gear 33 is connected to the first embossing roller 23 through a tension sleeve to facilitate stepless rotation between the two.

[0067] The first rubber roller 21 , the first printing roller 23 , and the second printing roller 24 are sequentially distributed along the conveying direction of the paper, and the central axes of the three rollers are located on the same horizontal plane. The second rubber roller 22 is located above the second printing roller 24 .

[0068] A four-roller printing composite device in this embodiment works as follows:

[0069] The first single-layer base paper enters between the embossing roller group consisting of the first rubber roller 21 and the first embossing roller 23, and a concave indentation is formed on its surface after being pressed by the composite part on the first embossing roller 23;

[0070] The second single-layer base paper enters between the embossing roller group consisting of the second rubber roller 22 and the second embossing roller 24, and a concave indentation is formed on its surface after being pressed by the composite part on the second embossing roller 24;

[0071] The two single-layer base papers after printing enter between the composite roller group composed of the first printing roller 23 and the second printing roller 24 as their respective printing rollers rotate. Under the pressure of a pair of composite parts located at the composite position, the bottoms of the corresponding indentations on the two single-layer base papers are intertwined with each other to form a non-gelatinized composite.

[0072] A four-roller printing and compounding device in this embodiment optimizes the arrangement of the rollers, so that the printing and compounding operations of the paper towel can be completed by only four rollers, thereby greatly reducing the number of rollers and their accessories used, which is beneficial to saving costs and space.

[0073] Example 2

[0074] This embodiment is an implementation method of the adjustment mechanism 4.

[0075] refer to Figure 2 , Figure 5 , Figure 6 As shown, the adjusting mechanism 4 includes a first adjusting component for driving the rubber roller and a second adjusting component for driving the printing roller.

[0076] The first adjusting component includes a first rotating plate 41 and a first driving source 42 for driving the rubber roller, and the second adjusting component includes a second rotating plate 43 and a second driving source 44 for driving the printing roller.

[0077] Specifically, the inner wall of the side plate of the frame 1 is hinged with a first rotating plate 41 through a pin shaft, the end of the rubber roller is rotatably set on the first rotating plate 41, and the other end of the first rotating plate 41 is connected to a first driving source 42, which is set on the end wall of the side plate through a connecting block 45.

[0078] The first rotating plate 41 is driven by the first driving source 42 to rotate along the hinge point between the first rotating plate 41 and the side plate, so as to adjust the distance between the rubber roller and the printing roller, and realize the separation or approach operation between the two rollers.

[0079] Furthermore, the connection block 45 is located on the side end of the side plate, one end of the first driving source 42 is hinged to the connection block 45, and the other end is hinged to the end of the first rotating plate 41 extending to the outside of the side plate, so that the entire first driving source 42 is located outside the side end, and the upper and lower hinge points of the first driving source 42 are ensured to be located in the same vertical plane as much as possible. This design can ensure torque or force balance and improve the working efficiency and stability of the adjustment component.

[0080] In addition, the first rotating plate 41 can be considered as two parts, one is a main body part for connecting the rubber roller, and the main body part is provided with a hinge shaft rotatably connected to the side plate; the other is an extension part extending along the top of the main body part to the outside of the side plate, and the extension part is used to connect with the first driving source 42. The provision of the extension part greatly increases the driving force arm of the first rotating plate 41.

[0081] At the same time, it should be noted that the inner side wall of the side panel refers to the side opposite to the two side panels. The side end of the side panel refers to the left and right sides of the side edge (with Figure 2 direction in the figure).

[0082] In this embodiment, as an implementation of the second adjustment component, at least one printing roller is connected to the second driving source 44 through the second rotating plate 43, which is used to adjust the gap between the two printing rollers. The two ends of the first printing roller 23 are connected to the second driving source 44 through the second rotating plate 43, and the second rotating plate 43 and the second driving source 44 are located in the mounting groove 11 provided on the side plate. The second rotating plate 43 swings along the hinge point between it and the side plate under the drive of the second driving source 44, thereby adjusting the gap between the two printing rollers.

[0083] Preferably, the first driving source 42 and the second driving source 44 are oil cylinders or air cylinders, and the first driving source 42 and / or the second driving source 44 are connected to a gas-liquid booster 46, so that the corresponding rollers can always be in the required "pressed" state under working conditions.

[0084] Specifically in this embodiment, the first rubber roller 21 and the second rubber roller 22 are both connected to the first driving source 42, the first printing roller 23 is connected to the second driving source 44, and the second driving source 44 is connected to the gas-liquid booster 46, so that in the working state, the corresponding roller bodies can always be in the required "pressing" state.

[0085] It is worth noting that the above-mentioned "pressing" state can be a state in which the two rollers are in contact with each other, or a state in which a constant gap is left between the two rollers. The specific situation can be determined according to actual production needs.

[0086] In the four-roller printing composite device of the present embodiment, the spacing between the two rollers that cooperate with each other is designed to be adjustable. When feeding paper manually, the rubber roller and the printing roller are separated from each other, and the two printing rollers are separated from each other, so that the two rollers of the printing roller group and the two rollers of the composite roller group are in an "open" state, thereby ensuring that the paper towel can be more conveniently and quickly inserted into the corresponding roller group. At the same time, the swing design can effectively reduce the wear of the components, which is conducive to extending their service life. In addition, the second rotating plate 43 and the second driving source 44 are embedded in the side plate, which is conducive to saving space.

[0087] Example 3

[0088] A four-roller printing composite device in this embodiment, based on the above embodiment, further includes a brush roller 5 and a lubrication roller 6.

[0089] Specifically, as shown in Figure 6, the brush roller 5 is arranged on the inner side of the side plate and is located next to the printing roller to clean the paper scraps adhering to the printing roller in time.

[0090] At the same time, in order to prevent the falling paper scraps from causing secondary pollution, a scrap collecting box 7 for collecting the falling paper scraps is provided below the brush roller 5 .

[0091] The lubricating roller 6 is also arranged beside the printing roller. The lubricating roller 6 is provided with an oily felt so that the printing roller can be coated with lubricating oil.

[0092] Specifically in this embodiment, the first printing roller 23 is equipped with a lubrication roller 6, and the second printing roller 24 is equipped with a brush roller 5, and the brush roller 5 is located on the right side of the second printing roller 24 (with Figure 6 direction of the paper).

[0093] In addition, in order to prevent fingers from being accidentally caught between the printing rollers during manual paper feeding, a protective plate 8 is provided at the entrance of the paper towel of the printing roller group, so as to form a shield at the entrance of the paper towel to prevent fingers from being caught. At the same time, a gap is left between the protective plate 8 and the rubber roller for the paper towel to pass through.

[0094] Preferably, the protective plate 8 is an L-shaped angle iron.

[0095] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A four-roller printing composite device, comprising a frame (1), characterized in that: The frame (1) comprises two side panels arranged opposite to each other, and a crossbeam arranged between the two side panels; A printing composite mechanism (2) is also provided between the two side plates, and the printing composite mechanism (2) comprises two rubber rollers and two printing rollers; The first rubber roller (21) and the first printing roller (23) cooperate with each other, and the second rubber roller (22) and the second printing roller (24) cooperate with each other, so as to press printed patterns on their respective single-layer paper towels; A matching gap for pressing and compounding is formed between the first printing roller (23) and the second printing roller (24), and the two roller bodies that match each other rotate in opposite directions; A driving mechanism (3), wherein the driving mechanism (3) is used to drive the printing roller of the printing composite mechanism (2) to rotate; And an adjustment mechanism (4), wherein the adjustment mechanism (4) is used to adjust the roller spacing between two roller bodies that cooperate with each other.

2. A four-roller printing composite device according to claim 1, characterized in that: The adjustment mechanism (4) comprises a first adjustment component for driving the rubber roller, the first adjustment component comprises a first rotating plate (41) hinged on the inner wall of the side plate, and the two ends of the rubber roller are respectively rotatably arranged on the corresponding first rotating plate (41); The first rotating plate (41) swings under the drive of the first driving source (42) to adjust the distance between the rubber roller and the corresponding printing roller.

3. A four-roller printing composite device according to claim 2, characterized in that: A connecting block (45) is provided on both side ends of the side plate; one end of the first driving source (42) is hinged to the connecting block (45), and the other end is hinged to the end of the first rotating plate (41) extending to the outside of the side plate, so that the entire first driving source (42) is located outside the side wall.

4. A four-roller printing composite device according to claim 2, characterized in that: The adjustment mechanism (4) also includes a second adjustment component for driving the printing roller, which includes a second rotating plate (43) and a second driving source (44); wherein at least one printing roller is connected to the second driving source (44) via the second rotating plate (43), and the second rotating plate (43) swings along the hinge point at its end under the drive of the second driving source (44); and the second rotating plate (43) and the second driving source (44) are located in a mounting groove (11) provided on the side plate.

5. A four-roller printing composite device according to claim 4, characterized in that: The first driving source (42) and the second driving source (44) are oil cylinders or air cylinders, and the first driving source (42) and / or the second driving source (44) are connected to a gas-liquid booster (46).

6. A four-roller printing composite device according to any one of claims 1 to 5, characterized in that: The side plate is provided with a brush roller (5) and / or a lubrication roller (6), wherein the brush roller (5) is used to clean paper scraps on the printing roller, and a scrap collection box (7) is provided below the brush roller (5); The lubricating roller (6) is provided with a felt for applying lubricating oil to the printing roller.

7. A four-roller printing composite device according to claim 6, characterized in that: The side plate is provided with a protective plate (8), which is located at the paper towel entrance of the rubber roller and the corresponding printing roller to form a shield, and a gap is left between the protective plate (8) and the rubber roller for the paper towel to pass through.

8. A four-roller printing composite device according to claim 6, characterized in that: The first rubber roller (21), the first printing roller (23), and the second printing roller (24) are sequentially distributed along the conveying direction of the paper, and the central axes of the three rollers are located on the same horizontal plane.

9. A four-roller printing composite device according to any one of claims 1 to 5, characterized in that: The printing roller is provided with a compound part, and the pressing surfaces of the pair of compound parts located at the compound position on the two printing rollers have at least partial areas corresponding to each other on the top, which are used for pressing and compounding the paper towel.

10. A four-roller printing composite device according to claim 9, characterized in that: A pair of composite parts located at the composite position have a gap between their top pressed surfaces of 0.01-0.3 mm.

11. A four-roller printing composite device according to claim 10, characterized in that: It is a pair of composite parts that fit each other, and the widths of the pressed surfaces are arranged to be larger and smaller.

12. A four-roller printing composite device according to claim 9, characterized in that: The driving mechanism (3) comprises a driving motor (31), a first gear (32), and a second gear (33); wherein: The driving motor (31) is connected to the second printing roller (24), and the two printing rollers are meshed and driven via a first gear (32) and a second gear (33); At least one of the first gear (32) and the second gear (33) can be rotated and adjusted relative to the embossing rollers connected thereto, so that when the two gears are meshed with each other, a pair of composite parts located at composite positions on the two embossing rollers at least partially correspond to each other.

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