Production method and equipment of single-copy multi-copy printing paper

Abstract

The invention relates to a production method and equipment of single-copy multi-copy printing paper, which is characterized by adopting a production process of uncoiling a roll material, rectifying deviation, gathering, cutting a longitudinal easy-to-tear line, drawing a book division mark, pressing a lock code, pressing paper and conveying, cutting into single copies, separating and conveying, overlapping and conveying, and vibrating and collecting paper. Equipment for implementing the production process comprises a plurality of sets of uncoiling seats, a deviation rectifying device, a marking device, an easy-to-tear line cutting device, a lock code pressing device, a paper pressing and conveying device, a cutting device, a separating and conveying device, a stacking and conveying device, a vibration paper collecting table and a control system which are arranged in sequence. According to the production process and equipment, the roll type carbonless copy paper is adopted as a raw material to continuously and directly produce finished products, and the technical problems of high efficiency and low loss in production of a single piece of carbonless copy printing paper are solved.

Description

Technical Field

[0001] This patent relates to a method and equipment for processing office paper products, and in particular to a method and equipment for producing single-copy multi-copy printing paper. Background Art

[0002] Carbonless copy paper is widely used in commercial paper applications such as banking, taxation, telecommunications, postal services, insurance, and catering due to its advantages such as ease of use, cleanliness, high copy yield, clear handwriting, easy processing, and neat copying, making it particularly suitable for computer printing. It typically consists of two to six sheets of carbonless copy paper. Carbonless copy paper, also known as pressure-sensitive printing paper, consists of an upper sheet, a middle sheet, and a lower sheet. The backs of the upper and middle sheets are coated with a colorant (CB coating), while the fronts of the middle and lower sheets are coated with a colorant (CF coating). The fronts of the upper and lower sheets remain uncoated. Color development occurs through a chemical reaction between the colorant layer of microcapsules and the acidic clay in the developer layer. During printing, the printing needle applies pressure to the paper surface, crushing the microcapsules and causing the colorant and developer to react. The number of color layers commonly used is 2 to 6 (each layer is usually called a copy, with the first copy also called the upper copy, the second layer the second copy, and so on). These layers are primarily used for continuous printing with dot matrix printers, but can also be used for handwriting, achieving the effect of simultaneously copying multiple copies. With the increasing popularity of push-type printers across various industries, the demand for single-copy multi-copy paper is increasing.

[0003] Based on the above needs, our company has developed a single multi-copy printing paper (such as the attached Figure 6 (As shown), this is a push-type printing paper with a lock code and tear-off edge. This push-type printing paper is composed of a single-layer top sheet, 0 to 6 layers of middle paper, and a single-layer bottom sheet, stacked together and trimmed evenly on all sides. The layers are riveted together with a row of evenly spaced lock codes on each side. A tear line is pressed into the inner side of each lock code. The lock codes consist of symmetrical locking claws with three sides cut and one side uncut, with the cut-off heads embedded downward. At least two pairs of these claws form a lock code. The tear lines are dashed lines cut at intervals. The existing technology for producing this single-copy carbonless copy printing paper adopts a production process of "unrolling the roll base paper - collating - pressing the locking code - cutting the tearing edge line - pressing the folding line - folding into a semi-finished product - trimming the finished product size". This production process has three problems: first, the production process is long, and the semi-finished product needs to be produced in a folded manner first, and then cut into finished products using a flat cutting machine, which requires multiple turnovers and low production efficiency; second, the finished product sizes vary, and after secondary cutting, a large amount of scrap material will be wasted; third, when trimming on the flat cutting machine, a large pressure is required to press the product, which can easily cause local stress and coloration of the product, reduce the product qualification rate, and cause large production losses. Summary of the Invention

[0004] The purpose of this patent is to provide a method and equipment for producing single-copy multi-copy printing paper to solve the technical problem of high efficiency and low loss in the production of single-copy carbonless copy printing paper.

[0005] To achieve the above purpose, this patent adopts the following technical solution: a method for producing single-copy multi-copy printing paper, comprising the following steps: Coil unwinding: Using roll carbonless copy paper as the raw material, the paper is unwound on the unwinding seat by the paper guide roller under the pulling force of the paper pressing and conveying device and then conveyed backwards. The upper, middle and lower paper are unwound separately. Deviation correction: The deviation of paper produced during the unwinding and transmission process is corrected to the normal position by using the deviation correction device; Collation: stack the unwound continuous paper in the order of upper paper, middle paper and lower paper and pass it over the upper surface of the bottom roller of the tear line cutting device; Cutting the longitudinal tear line: Use the dotted line cutter on the upper surface of the bottom roller on the tear line cutting device to press the longitudinal tear line on the assembled paper. Two sets of dotted line cutters can cut the tear line on both sides of the paper. Press-lock code: Use two sets of press-lock code devices to press lock codes on both sides of the paper and rivet the layers of paper together; Pressed paper conveyor: The rubber press roller of the pressurized paper conveyor presses on the bottom knife roller of the cutting device, and the rotation of the bottom knife roller generates a pulling force on the paper to convey the paper backwards; Cutting into individual copies: The cutter blade of the cutting device presses the assembled continuous paper onto the bottom knife roller through rotational pressure to cut the paper in a taut state into individual finished copies. Specifically, the paper in a taut state is that the head of the paper has entered the separation conveyor before being cut. The conveying line speed of the separation conveyor is set higher than the line speed of the paper pressing conveyor. Tension is generated between the head of the paper and the rubber paper pressing roller, keeping the paper in a taut state. Separation conveyor: Set the conveying speed of the separation conveyor device to be higher than that of the paper pressing conveyor device. The cut single finished products will be separated after entering the separation conveyor device and will be conveyed backward quickly. Overlapping conveying: The finished products coming out of the separating conveyor fall onto the overlapping conveyor and continue to be conveyed backward. The method for continuing to convey backward is to set the speed of the overlapping conveyor to be lower than that of the separating conveyor so that the head of the finished product entering later can press on the tail of the finished product entering earlier, so that the heads and tails of the finished products in front and behind can be conveyed backward in a state of overlapping each other. Vibration paper collection: Use a vibrating paper collection table to stack single finished products neatly one by one using high-frequency vibration.

[0006] A further technical solution is that the method for producing the above-mentioned single-copy multi-copy printing paper further includes the following steps while performing the step of cutting the longitudinal tear line: Marking of book divisions: Marks are made on paper using a marking pen of a marking device according to the set number of copies of each product; the control method is that the controller of the control system counts the number of cuts made by the cutting knife of the cutting device, and when the preset number of copies is reached, the traction electromagnet of the marking device is controlled to press the marking pen to make a mark on the paper.

[0007] A further technical solution is that in the above-mentioned cutting into single copies process, the continuous paper with pages is cut into single finished products by the cutting knife of the cutting device through rotating pressure pressing on the bottom knife roller. The paper is cut into single finished products. The specific method is: the rotation speed of the bottom knife roller is fed back to the controller through the encoder installed at the end of the bottom knife roller, and the controller calculates the linear speed of the paper based on the received rotation speed signal and the diameter of the bottom knife roller, and then calculates the rotation speed of the mounting roller based on the length of the single finished product preset on the touch screen and the rotation diameter of the cutting knife edge on the mounting roller, and feeds back and controls the servo motor installed at the end of the mounting roller to drive the mounting roller to rotate according to the obtained rotation speed, so that the cutting knife is pressed on the bottom knife roller through rotation pressure to cut the paper into single finished products of preset length.

[0008] This patent also includes a production device for implementing the above-mentioned single-copy multi-copy printing paper production method, including multiple sets of unwinding seats, deviation correction devices, marking devices, tear line cutting devices, code pressing devices, paper pressing and conveying devices, cutting devices, separation and conveying devices, stacking and conveying devices, and vibrating paper collection platforms arranged in sequence, and also includes a control system; the specific solutions are: The code pressing and locking device includes a bottom die with a groove and a code locking knife installed on the upper cutting die, the bottom die and the cutting die are respectively installed on the transmission shaft, and the cutting edge of the code locking knife includes at least two pairs of evenly spaced V-shaped cutting edges; The paper pressing and conveying device comprises a rubber paper pressing roller pressed on the bottom knife roller of the cutting device, a lower supporting roller staggeredly installed in front of the rubber paper pressing roller, and an upper pressure roller with adjustable height; The separation conveying device comprises a lower conveyor belt and an upper conveyor belt, the lower conveyor belt and the upper conveyor belt are staggered and installed with their surfaces tightly attached; The superimposed conveyor is connected to the rear of the separating conveyor and is lower than the separating conveyor and has a lower speed than the separating conveyor. The superimposed conveyor includes a flat belt group consisting of two groups of flat belt groups connected to each other and adjustable in angle, and a group of auxiliary pressure wheels are provided on the flat belt group. The control system includes a controller, a touch screen, an encoder installed at the end of the bottom knife roller and a servo motor installed at the end of the knife roller. The controller is electrically connected to the touch screen, the encoder, the servo motor and the traction electromagnet.

[0009] Compared with the existing technology, the beneficial effects of this patent are as follows: the production method of single-copy multi-copy printing paper described in this patent adopts the production process of "roll unwinding - correcting the deviation - collating - cutting the longitudinal tear line - drawing the booklet marking - pressing the lock code - pressing and conveying the paper - cutting into single copies - separating and conveying - stacking and conveying - vibrating paper collection". The equipment implementing this production method includes multiple sets of unwinding seats, correcting the deviation, drawing the mark device, cutting the tear line device, pressing and locking the code device, pressing and conveying the paper, cutting device, separating and conveying device, stacking and conveying device, vibrating paper collection table and control system arranged in sequence. This production process and equipment uses roll-type carbonless copy paper as the raw material for continuous production, reducing the turnover of intermediate semi-finished products and improving production efficiency. The paper is cut to length accurately, and the finished product can be produced directly without the need for secondary fine cutting or processing allowance, thereby reducing the processing loss of traditional production methods. This technical solution solves the technical problem of high efficiency and low loss in the production of single-copy carbonless copy printing paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Attachment Figure 1 This is a schematic diagram of an embodiment of the production process of this patent.

[0011] Attachment Figure 2 This is the schematic diagram of the patented production equipment.

[0012] Attachment Figure 3 It is a structural diagram of the unwinding seat in the production equipment of this patent.

[0013] Attachment Figure 4 It is a structural diagram of the code locking knife in the production equipment of this patent.

[0014] Attachment Figure 5 This is a schematic diagram of the control system in the patented production equipment.

[0015] Attachment Figure 6 This is a schematic diagram of the structure of a single finished product produced by this patented production equipment.

[0016] Explanation of the symbols in the accompanying drawings: 1—upper paper, 2—middle paper, 3—lower paper, 4—single finished product, 10—unwinding seat, 20—correction device, 30—marking device, 40—easy-tear line cutting device, 50—code pressing device, 60 paper pressing and conveying device, 70—cutting device, 80—separation and conveying device, 90—superposition conveying device, 95—vibration paper collection platform, 99—control system. DETAILED DESCRIPTION

[0017] In order to make the implementation purpose, technical solutions and advantages of this patent more clear, the patent solution is described in detail in the form of an embodiment in conjunction with the accompanying drawings.

[0018] Example 1, as shown in the process flow chart of Figure 1 and the attached Figure 2As shown in the schematic diagram of the production equipment, this method for producing single-copy, multi-part printing paper includes the following steps: unwinding the roll - correcting the webpage - collating the pages - cutting the longitudinal tear line - marking the booklet - pressing and locking the code - pressing and conveying the paper - cutting into individual copies - separating and conveying the paper - stacking and conveying the paper - and vibrating the paper collection. The equipment implementing this production method includes, in sequence, multiple sets of unwinding stations 10, a correcting device 20, a marking device 30, a tear line cutting device 40, a locking code device 50, a press and conveying device 60, a cutting device 70, a separating and conveying device 80, a stacking and conveying device 90, a vibrating paper collection table 95, and a control system 99. The following details the implementation of each step and the associated equipment structure.

[0019] Process 100: Unwinding of roll material: Using roll carbonless copy paper as raw material, the paper is unwound on the unwinding seat 10 by the paper guide roller 11 under the pulling force of the paper pressing and conveying device 60 and conveyed backward. The upper paper 1, the middle paper 2 and the lower paper 3 are unwound respectively; the upper paper 1, the middle paper 2 and the lower paper 3 are respectively installed on an unwinding shaft 12, as shown in the attached figure. Figure 3 As shown, the unwinding station 10 comprises two wall panels 13. The ends of the unwinding shaft 12 are mounted on the upper ends of the wall panels 13 via bearings. One end is also connected to a magnetic powder clutch 14, which is fixedly mounted on the upper side of one wall panel 13. At least one paper guide roller 11 is also installed between the two wall panels 13. This embodiment is for a triple-up product, that is, a layer of middle paper 2. When producing a quadruple-up product, an additional layer of middle paper 2 is added. Similarly, for other multi-up products, a corresponding number of layers of middle paper 2 are added. The number of unwinding stations 10 in the equipment configuration is determined by the number of multi-up products. When producing a two-up product, the middle paper 2 is eliminated, leaving only the upper paper 1 and the lower paper 3.

[0020] Process 200: Deviation correction: The deviation phenomenon generated during the transmission of paper after unwinding is corrected to the normal position using the deviation correction device 20; the technical solution of the deviation correction device 20 can be composed of a plurality of high-precision CNC deviation correction devices (utility model patent number: 201922478004.1) designed by our company in 2019.

[0021] Process 300: Collation: The unwound continuous paper is stacked in the order of upper sheet 1, middle sheet 2, and lower sheet 3, and then passed over the upper surface of the bottom roller 41 of the tear-off cutter 40. To ensure that the paper enters the tear-off cutter 40 at a more appropriate angle, a row of paper guide rollers 11 is installed in front of the tear-off cutter 40, and each layer of paper passes through a paper guide roller 11.

[0022] Process 400: Cutting the longitudinal tear line: Use the dotted line cutter 42 on the tear line cutting device 40, which is pressed against the upper surface of the bottom roller 41, to cut the longitudinal tear line on the assembled paper. Two sets of dotted line cutters 42 can be used to cut the tear lines on both sides of the paper. Figure 2As shown, the tear line cutting device 40 includes a bottom roller 41 and a dotted line cutter 42 mounted above and pressing against the bottom roller 41. As paper passes over the bottom roller 41, the dotted line cutter 42 is pressed down, continuously cutting longitudinal tear lines in the paper. Depending on the product requirements, multiple dotted line cutters 42 can be mounted simultaneously above the bottom roller 41 to cut multiple longitudinal tear lines.

[0023] Step 500: Pressing and locking codes: Use two sets of pressing and locking code devices 50 to press and lock codes on both sides of the paper, riveting the layers of paper together. The pressing and locking code devices 50 include a bottom die 51 with a groove and a locking code knife 53 mounted on an upper cutting die 52. The bottom die 51 and the cutting die 52 are each mounted on a transmission shaft. The locking code knife 53 presses the bottom die 51 through rotational force to press and lock codes on the passing paper. The shape of the locking code knife 53 is as shown in the attached figure. Figure 4 As shown, the blade of the locking knife 53 includes at least two pairs of V-shaped cutting edges with uniform spacing, and the groove of the bottom mold 51 matches the spacing between the V-shaped cutting edges.

[0024] Step 600: Pressed Paper Conveyor: The rubber press roller 61 of the pressurized paper conveyor 60 exerts pressure on the bottom blade roller 71 of the cutting device 70. The rotation of the bottom blade roller 71 generates a pulling force on the paper, causing it to be conveyed backward. The staggered lower support rollers 62 and the height-adjustable upper press roller 63, installed in front of the rubber press roller 61, increase the contact surface of the paper on the rubber press roller 61, ensuring slip-free and stable paper conveyance. The pulling force on the upper, middle, and lower sheets 1, 2, and 3 is controlled by the magnetic powder clutch 14 (see attached) mounted on the unwinding station 10. Figure 3 The braking force generated by the magnetic powder clutch 14 is controlled by adjusting the current, so each magnetic powder clutch 14 is equipped with a current regulator for adjusting the tension of each layer of paper to ensure smooth paper transportation.

[0025] Process 700 is cutting into single copies: the continuous paper with pages is cut into single copies 4 by pressing the cutting knife 72 of the cutting device 70 on the bottom knife roller 71 through rotational pressure. The paper passing through the paper in a tensioned state is cut. The cutting device 70 includes a bottom knife roller 71 and a knife-mounting roller 73. The knife-mounting roller 73 has a long slot for installing a linear cutting knife 72. The cutting knife 72 is installed on the knife-mounting roller 73 and presses the bottom knife roller 71 through rotational pressure to cut the paper on the bottom knife roller 71. In order to cut the paper in a tensioned state, the head of the paper enters the separation and conveying device 80 before cutting. The transmission line speed of the separation and conveying device 80 is set higher than the line speed of the paper pressing transmission. Tension can be generated between the head of the paper and the rubber paper pressing roller 61, so that the paper is cut in a tensioned state. The structure of the single finished product 4 is shown in the attached figure. Figure 6The single finished product 4 cut out by this processing method of stacking and locking together and then cutting is neat and precise, does not need to be trimmed again, and thus has no processing allowance and high material utilization rate.

[0026] Process 800: Separation and Conveying: The conveying linear speed of the separation and conveying device 80 is set higher than the linear speed of the paper pressing and conveying device 60. The cut single finished products 4 are separated after entering the separation and conveying device 80 and are conveyed backward quickly.

[0027] The separation and conveying device 80 includes a lower conveyor belt 81 and an upper conveyor belt 82. The lower conveyor belt 81 and the upper conveyor belt 82 are installed in an offset manner and the belt surfaces are tightly attached. When the paper comes out of the cutting device 70 and is not cut, it enters the lower conveyor belt 81 and the upper conveyor belt 82 under the rotation of the upper conveyor belt 82, is clamped and conveyed backward. Since the transmission line speed of the separation and conveying device 80 is set higher than the line speed of the paper pressing and conveying device 60, before the paper is cut, the head of the paper to the rubber paper pressing roller 61 can generate a tensioning force under the action of the belt friction force. After cutting, the single finished product 4 can quickly leave the cutting knife 72 and generate an interval and be quickly conveyed backward; the lower conveyor belt 81 and the upper conveyor belt 82 are installed in an offset manner and the belt surfaces are tightly attached, so that the upper and lower belt rollers of metal materials can be offset from each other, so that the upper and lower belts have elastic contact, and the paper will not be discolored due to excessive local pressure after entering.

[0028] Process 900: Overlapping Conveying: The finished products 4 exiting the separating conveyor 80 land on the overlay conveyor 90 and continue to be conveyed backward. The overlay conveyor 90 is connected to the back of the separating conveyor 80 of the previous process and is lower than the separating conveyor 80. The conveyor belt speed is lower than that of the separating conveyor 80, so that the head of the finished product 4 entering from the back can press against the tail of the finished product 4 entering from the front, so that the heads and tails of the finished products 4 in front and behind can be stacked on each other. The overlay conveyor 90 includes a flat belt assembly 91 composed of two interconnected and angle-adjustable flat belts. A set of auxiliary pressure rollers 92 are placed above the flat belt assembly 91. The technical solution of the flat belt assembly 91 consisting of two sets of angle-adjustable flat belts allows the height of the semi-finished products 4 to be raised during the backward conveying process to accommodate the operating height of the vibrating paper collection platform 95 at the rear end. The auxiliary pressure rollers 92 on the flat belt assembly 91 use their own weight and passive rotation to press down on the finished products 4, keeping the paper from loosening during conveying and ensuring smoother conveying.

[0029] Process 950: Vibratory Paper Collection: A vibratory paper collection platform 95 uses high-frequency vibration to neatly stack the individual finished products 4. This platform can utilize our company's three-stage vibration reduction and automatic lifting function (Utility Model Patent No.: 202021705318.7). The platform of the vibratory paper collection platform 95 is located behind the stacking conveyor 90 and is lower than the surface of the flat belt assembly 91. It is tilted backward, allowing the delivered individual finished products 4 to land on the platform. High-frequency vibration is then used to neatly stack the individual finished products 4.

[0030] In the second embodiment, the method for producing a single-copy multi-copy printing paper includes performing the following steps simultaneously with cutting the longitudinal tear line in step 400: Process 450: Marking the booklets: Mark the paper with the marking pen 31 of the marking device 30 according to the set number of copies of each product; the control method is that the controller 991 of the control system 99 counts the number of cuts made by the cutting knife 72 of the cutting device 70, and when the preset number of copies is reached, the traction electromagnet 32 of the marking device 30 is controlled to operate, pressing the marking pen 31 to mark the paper.

[0031] As attached Figure 5 As shown, the control system 99 includes a controller 991, a touch screen 992, an encoder 993 installed at the end of the bottom knife roller 71 and a servo motor 994 installed at the end of the knife roller 73. The controller 991 is electrically connected to the touch screen 992, the encoder 993, the servo motor 994 and the traction electromagnet 32.

[0032] In the above-mentioned embodiment, in the process of cutting into single copies in step 700, the continuous paper with pages is pressed against the bottom knife roller 71 by the cutting knife 72 of the cutting device 70 through rotational pressure to cut the paper passing under tension into single finished products 4. The specific method is as follows: the rotation speed of the bottom knife roller 71 is fed back to the controller 991 through the encoder 993. The controller 991 calculates the linear speed of the paper based on the received rotation speed signal and the diameter of the bottom knife roller 71, and then calculates the rotation speed of the mounting roller 73 based on the length of the single finished product 4 preset on the touch screen 992 and the rotational diameter of the cutting edge of the cutting knife 72 on the mounting roller 73. The servo motor 994 is fed back and controlled to rotate the mounting roller 73 at the obtained rotation speed, so that the cutting knife 72 presses on the bottom knife roller 71 through rotational pressure to cut the paper into single finished products 4 of the preset length. This method changes the traditional technical solution of using cutting rollers of different diameters to control the cutting length, solves the trouble of changing the cutting roller when changing the length specification, and can set the length arbitrarily within the range of 120mm to 500mm without being restricted by the transmission gear. In addition, the dimensional accuracy of the cutting length can reach 0.1mm, meeting and exceeding the standard requirement of product dimensional deviation of ±0.5mm.

[0033] The technical solution described in this patent uses common materials, is suitable for industrial production, and is feasible and practical.

Claims

1. A method for producing a single multi-copy printing paper, characterized in that The process includes the following steps: Coil unwinding: Using roll carbonless copy paper as the raw material, the paper is unwound on the unwinding seat by the paper guide roller under the pulling force of the paper pressing and conveying device and then conveyed backwards. The upper, middle and lower paper are unwound separately. Deviation correction: The deviation of paper produced during the unwinding and transmission process is corrected to the normal position by using the deviation correction device; Collation: stack the unwound continuous paper in the order of upper paper, middle paper and lower paper and pass it over the upper surface of the bottom roller of the tear line cutting device; Cutting the longitudinal tear line: Use the dotted line cutter on the upper surface of the bottom roller on the tear line cutting device to press the longitudinal tear line on the assembled paper. Two sets of dotted line cutters can cut the tear line on both sides of the paper. Press-lock code: Use two sets of press-lock code devices to press lock codes on both sides of the paper and rivet the layers of paper together; Pressed paper conveying: The rubber press roller of the press-on conveying device presses on the bottom knife roller of the cutting device, and the rotation of the bottom knife roller generates a pulling force on the paper to convey the paper backwards; Cutting into individual copies: The cutter blade of the cutting device presses the assembled continuous paper onto the bottom knife roller through rotational pressure to cut the paper in a taut state into individual finished copies. Specifically, the paper in a taut state is that the head of the paper has entered the separation conveyor before being cut. The conveying line speed of the separation conveyor is set higher than the line speed of the paper pressing conveyor. Tension is generated between the head of the paper and the rubber paper pressing roller, keeping the paper in a taut state. Separation conveyor: Set the conveying speed of the separation conveyor device to be higher than that of the paper pressing conveyor device. The cut single finished products will be separated after entering the separation conveyor device and will be conveyed backward quickly. Overlapping conveying: The finished products coming out of the separating conveyor fall onto the overlapping conveyor and continue to be conveyed backward. The method for continuing to convey backward is to set the speed of the overlapping conveyor to be lower than that of the separating conveyor so that the head of the finished product entering later can press on the tail of the finished product entering earlier, so that the heads and tails of the finished products in front and behind can be conveyed backward in a state of overlapping each other. Vibration paper collection: Use a vibrating paper collection table to stack single finished products neatly one by one using high-frequency vibration.

2. The method for producing a single copy of multi-copy printing paper according to claim 1, characterized in that: The following steps are also included when implementing the longitudinal tear line cutting process: Marking of book divisions: Marks are made on paper using a marking pen of a marking device according to the set number of copies of each product; the control method is that the controller of the control system counts the number of cuts made by the cutting knife of the cutting device, and when the preset number of copies is reached, the traction electromagnet of the marking device is controlled to press the marking pen to make a mark on the paper.

3. The method for producing a single copy of multi-copy printing paper according to claim 2, characterized in that: In the process of cutting into single portions, the specific method of cutting is as follows: the rotation speed of the bottom knife roller is fed back to the controller through an encoder installed at the end of the bottom knife roller. The controller calculates the linear speed of the paper based on the received rotation speed signal and the diameter of the bottom knife roller. The controller then calculates the rotation speed of the mounting roller based on the length of the single finished product preset on the touch screen and the rotation diameter of the cutting knife edge on the mounting roller. The servo motor installed at the end of the mounting roller is fed back and controlled to drive the mounting roller to rotate at the obtained rotation speed, so that the cutting knife presses on the bottom knife roller through rotational pressure to cut the paper into single finished products of preset length.

4. A device for producing single-copy multi-copy printing paper, used to implement the above-mentioned method for producing single-copy multi-copy printing paper, characterized in that: It includes multiple sets of unwinding seats, deviation correction devices, marking devices, tear line cutting devices, code pressing and locking devices, paper pressing and conveying devices, cutting devices, separation and conveying devices, superimposed conveying devices, and vibrating paper receiving tables arranged in sequence, as well as a control system; The code pressing and locking device includes a bottom die with a groove and a code locking knife installed on the upper cutting die, the bottom die and the cutting die are respectively installed on the transmission shaft, and the cutting edge of the code locking knife includes at least two pairs of evenly spaced V-shaped cutting edges; The paper pressing and conveying device comprises a rubber paper pressing roller pressed on the bottom knife roller of the cutting device, a lower supporting roller staggeredly installed in front of the rubber paper pressing roller, and an upper pressure roller with adjustable height; The separation conveying device comprises a lower conveyor belt and an upper conveyor belt, the lower conveyor belt and the upper conveyor belt are staggered and installed with their surfaces tightly attached; The superimposed conveyor is connected to the rear of the separating conveyor and is lower than the separating conveyor and has a lower speed than the separating conveyor. The superimposed conveyor includes a flat belt group consisting of two groups of flat belt groups connected to each other and adjustable in angle, and a group of auxiliary pressure wheels are provided on the flat belt group. The control system includes a controller, a touch screen, an encoder installed at the end of the bottom knife roller and a servo motor installed at the end of the knife roller. The controller is electrically connected to the touch screen, the encoder, the servo motor and the traction electromagnet.

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