A printing assembly and method of changing the direction of travel of printed paper

Abstract

The invention relates to a component on a printing device, a printing assembly comprising a frame, a transfer roller, a printing roller, an ink roller mounted on the frame from top to bottom, an ink tank below the ink roller, the ink roller extending into the ink tank, the ink roller being a component for dipping ink, the ink roller being in contact with the printing roller, the ink roller transferring the ink dipped from the ink tank to the printing roller, the printing roller being in contact with the transfer roller, a printing site between the printing roller and the transfer roller, the printing paper passing between the printing roller and the transfer roller to complete printing; the outer periphery of the transfer roller and / or the printing roller has a rubber layer, the inner periphery of the rubber layer has a surrounding hollow core, and the hollow core is connected with a valve. The printing assembly has the advantages of being able to change the pressing force between the printing roller and the transfer roller, being able to change the conveying direction of the printing paper, and being convenient to use.

Description

Technical Field

[0001] This invention relates to components of a printing apparatus, particularly to a printing assembly, and also provides a method for changing the direction of paper travel. Background Technology

[0002] The printing assembly includes a frame, and a transfer roller, a printing roller, and an ink roller mounted on the frame from top to bottom. Below the ink roller is an ink tank, and the ink roller extends into the ink tank. The ink roller is the component that picks up ink. The ink roller is in contact with the printing roller, and the ink roller transfers the ink picked up from the ink tank to the printing roller. The printing roller is in contact with the transfer roller, and the area between the contact points of the printing roller and the transfer roller is the printing section. The printing paper passes between the printing roller and the transfer roller to complete the printing process.

[0003] In the prior art, the printing roller and the transfer roller are made entirely of stainless steel and cannot be deformed.

[0004] On the one hand, sometimes the holding force between the printing roller and the transfer roller needs to be adjusted according to the type of ink and printing paper in order to achieve better printing results. However, since the holding force between the printing roller and the transfer roller cannot be adjusted in the existing technology, it has the disadvantage of being inconvenient to use.

[0005] On the other hand, during the printing process, sometimes the direction of the printing paper is not correct when it is being transported to the printing area. For example, there is an angle between the direction of the printing paper and the direction directly in front of it, that is, the forward movement of the printing paper deviates. In the prior art, the printing roller and the transfer roller cannot be deformed, so they cannot change the direction of the printing paper being transported, which also has the disadvantage of being inconvenient to use. Summary of the Invention

[0006] The purpose of this invention is to address the above-mentioned shortcomings by providing a printing assembly that can change the holding force between the printing roller and the transfer roller, can change the conveying direction of the printing paper, and is easy to use, as well as a method for changing the direction of the printing paper.

[0007] The technical solution of the printing assembly of the present invention is implemented as follows: A printing assembly includes a frame, and a transfer roller, a printing roller, and an ink roller are mounted on the frame from top to bottom. Below the ink roller is an ink tank, and the ink roller extends into the ink tank. The ink roller is a component that picks up ink. The ink roller is in contact with the printing roller, and the ink roller transfers the ink picked up from the ink tank to the printing roller. The printing roller is in contact with the transfer roller, and the area between the contact between the printing roller and the transfer roller is the printing section. Printing paper passes between the printing roller and the transfer roller to complete the printing process. The characteristic is that the outer periphery of the transfer roller and / or the printing roller has a rubber layer, and the inner periphery of the rubber layer has a surrounding hollow core, and the hollow core is connected to a valve.

[0008] Furthermore, the cross-section of the hollow core is a "︻" shaped structure or a square structure that is wide at both ends.

[0009] Furthermore, both the transfer roller and the printing roller have a rubber layer on their outer periphery, and each rubber layer is surrounded by an annular hollow core, which is the first hollow core. The first hollow core is a triangular or trapezoidal structure with a right-side width. The frame has vertical grooves, and both the transfer roller and the printing roller have a central shaft. A slider is located within the groove, and the central shaft is mounted on the slider. A spring is located within the groove, and the spring pushes against the slider. Both the transfer roller and the printing roller have shafts mounted on the frame, and these shafts have vertical dimensions.

[0010] Furthermore, the rubber layer also has another annular hollow core, which is the second hollow core. The second hollow core is not connected to the first hollow core, and the second hollow core is a triangular or trapezoidal structure with a wider left side.

[0011] Furthermore, the central shaft is hollow, and the hollow core is connected to the central shaft. A rotary joint is also connected to the central shaft, and the rotary joint is connected to the air supply source. The valve is installed between the rotary joint and the air supply source.

[0012] Furthermore, the first hollow core and the second hollow core are respectively connected to the two ends of the central shaft.

[0013] Furthermore, there is a metal material layer outside the rubber layer.

[0014] Furthermore, a barometer is also installed on the valve.

[0015] Furthermore, a connecting post is also provided in the middle of the hollow core.

[0016] Furthermore, the sidewalls of the first and second hollow cores also have an inwardly curved structure.

[0017] Furthermore, the path of the printing paper on the printing assembly is the printing paper travel path. The printing roller and the transfer roller are both working rollers, one of which is the first working roller and the other is the second working roller. The contact point between the printing roller and the transfer roller is the printing paper station. The printing paper travel path has a winding path after the printing paper station. This winding path is the post-winding path, which is a structure that matches the outer periphery of one of the working rollers.

[0018] Furthermore, the path of the printing paper on the printing paper is the printing paper travel path. The printing roller and the transfer roller are both working rollers, one of which is the first working roller and the other is the second working roller. The contact point between the printing roller and the transfer roller is the printing paper station. The printing paper travel path has a winding path in front of the printing paper station. This winding path is the front winding path, which is a structure that matches the outer periphery of one of the working rollers.

[0019] Furthermore, the work rollers used in conjunction with the back winding route and the front winding route are different work rollers.

[0020] The technical solution of the method for changing the direction of printing paper travel in this invention is implemented as follows: The method involves using a printing press for printing. The printing press has a frame, on which printing rollers and transfer rollers are mounted. Both the printing rollers and transfer rollers are work rollers, one being a first work roller and the other a second work roller. The contact point between the printing rollers and the transfer rollers is the printing paper station. Each work roller has a core in the middle, which is mounted on the frame. The core has a frame perpendicular to the cross-section of the printing paper station. At least one work roller has a rubber layer in the middle, which has a hollow core with a triangular or trapezoidal cross-section. A valve is connected to the hollow core, and the pressure inside the hollow core can be adjusted by adjusting the air pressure in the hollow core. This adjustment achieves the adjustment of the positional relationship of the work roller core, thereby changing the direction of paper transport.

[0021] The beneficial effects of this invention are: such a printing assembly has the advantages of being able to change the bearing force between the printing roller and the transfer roller, being able to change the conveying direction of the printing paper, and being easy to use. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention.

[0023] Figure 2 yes Figure 1 A schematic diagram of the cross-section along the A-A direction for the first case.

[0024] Figure 3 yes Figure 1 A schematic diagram of the cross-section along the A-A direction for the second case.

[0025] Figure 4 yes Figure 1 A schematic diagram of the cross-section along the A-A direction for the third case.

[0026] Figure 5 yes Figure 1 A schematic diagram of a cross-section along the B-B direction in one scenario.

[0027] Figure 6This is a side view of the present invention.

[0028] The components include: 1. Frame; 2. Transfer roller; 3. Printing roller; 4. Ink roller; 5. Ink tank; 6. Rubber layer; 7. Hollow core; 71. First hollow core; 72. Second hollow core; 8. Valve; 9. Slide groove; 10. Central shaft; 11. Slider; 12. Spring; 13. Metal material layer; 14. Connecting column; 15. Arc structure; 20. Printing paper travel path; 21. Printing paper station; 22. Back winding path; 23. Front winding path. Detailed Implementation

[0029] The technical solution of the present invention will be further described below with reference to the embodiments.

[0030] like Figure 1 , 2 As shown in Figure 3, a printing assembly includes a frame 1, and a transfer roller 2, a printing roller 3, and an ink roller 4 mounted on the frame from top to bottom. Below the ink roller is an ink tank 5. The ink roller extends into the ink tank and is a component that picks up ink. The ink roller is in contact with the printing roller, and the ink roller transfers the ink picked up from the ink tank to the printing roller. The printing roller is in contact with the transfer roller, and the area between the contact points of the printing roller and the transfer roller is the printing section. Printing paper passes between the printing roller and the transfer roller to complete the printing process. The characteristic feature is that the outer periphery of the transfer roller and / or the printing roller has a rubber layer 6, and the inner periphery of the rubber layer has a surrounding hollow core 7, which is connected to a valve 8.

[0031] This invention is designed so that air can be injected into the hollow core as needed through a valve to change the air pressure inside the hollow core, thereby changing the force exerted by the transfer roller and the printing roller on the printing area, achieving the purpose of changing the bearing force between the printing roller and the transfer roller.

[0032] Furthermore, the cross-section of the hollow core is a "︻" shaped structure or a square structure that is wide at both ends.

[0033] This invention, with its configuration, achieves the advantage that the force exerted on the printing area by the transfer roller and / or the outer peripheral surface of the printing roller is essentially consistent from one side to the other, thereby achieving a better printing effect.

[0034] To elaborate further, such as Figure 4 , 5As shown in Figure 6, both the transfer roller and the printing roller have rubber layers on their outer peripheries, and each rubber layer has an annular hollow core around it. This hollow core is the first hollow core 71, which is a triangular or trapezoidal structure with a right-side width. The frame has vertically oriented grooves 9, and both the transfer roller and the printing roller have central shafts 10. The grooves contain sliders 11, and the central shafts are mounted on the sliders. The grooves also contain springs 12, which push against the sliders. The transfer roller and the printing roller each have shafts mounted on the frame, and these shafts have vertically oriented frames. These frames ensure that the transfer roller and the printing roller can bend or tilt when subjected to different forces on their sides.

[0035] Because of the structure of the first hollow core, changing the air pressure inside the first hollow core can achieve uneven expansion of the left and right sides of the rubber layer. For example, when the right side of the first hollow core is wider, under negative pressure, the right side of the rubber layer is easily deformed and compressed, with the right diameter being smaller than the left diameter. This causes the printed paper output to deviate to the right, which can correct the left deviation. Under normal pressure inside the first hollow core, the diameter of the right side of the rubber layer is the same as the diameter of the left side, ensuring that the printed paper is output upright. Under high pressure inside the first hollow core, the diameter of the right side of the rubber layer is larger than the diameter of the left side, causing the printed paper output to deviate to the left, which can correct the right deviation.

[0036] Because the force is uneven at the contact point between the transfer roller and the printing roller, and the shaft core is tilted, and because the output direction of the paper at the printing section is consistent with the tangential direction of the contact point between the transfer roller and the printing roller, changing the tangential direction of the contact point between the transfer roller and the printing roller also changes the conveying direction of the printing paper, thus achieving the effect of changing the paper conveying direction.

[0037] In summary, the output direction of the printing paper can be changed by altering the air pressure inside the first core, making it convenient to use.

[0038] To elaborate further, such as Figure 4 As shown, the rubber layer also has another annular hollow core, which is the second hollow core 72. The second hollow core is not connected to the first hollow core, and the second hollow core is a triangular or trapezoidal structure with a wider left side.

[0039] This invention is designed to achieve bidirectional adjustment, meaning that the output direction of the printing paper can be changed by altering the air pressure within the first or second hollow core, making it more convenient to use.

[0040] To elaborate further, such as Figure 5 , 6As shown, the central shaft is hollow, the hollow core is connected to the hollow core of the central shaft, and there is a rotary joint connected to the central shaft. The rotary joint is connected to the air supply source, and the valve is installed between the rotary joint and the air supply source.

[0041] This invention allows for adjustment of the air pressure inside the hollow core during the operation of the transfer roller and / or printing roller, making it more convenient to use.

[0042] To elaborate further, such as Figure 5 As shown, the first hollow core and the second hollow core are respectively connected to the two ends of the central shaft.

[0043] To elaborate further, such as Figure 4 As shown, there is a metal material layer 13 outside the rubber layer.

[0044] This design ensures a smoother outer surface for the transfer roller and / or printing roller.

[0045] Furthermore, a barometer is also installed on the valve.

[0046] This invention makes it easier to connect the diameter of the outer periphery of the transfer roller and / or printing roller based on the barometer reading.

[0047] Furthermore, a connecting post 14 is also provided in the middle of the hollow core.

[0048] The present invention is configured as follows, such as Figure 4 As shown, this ensures a smoother outer surface for the transfer roller and / or printing roller.

[0049] To elaborate further, such as Figure 5 As shown, the sidewalls of the first hollow core and the second hollow core also have an inwardly curved structure 15.

[0050] This design ensures a smoother outer surface for the transfer roller and / or printing roller.

[0051] To elaborate further, such as Figure 6 As shown, the path of the printing paper on the printing assembly is the printing paper travel path 20. The printing roller and the transfer roller are both work rollers, one of which is the first work roller and the other is the second work roller. The contact point between the printing roller and the transfer roller is the printing paper station 21. The printing paper travel path has a winding path after the printing paper station, which is the post-winding path 22. The post-winding path is a structure that matches the outer periphery of one of the work rollers.

[0052] To elaborate further, such as Figure 6As shown, the path of the printing paper on the printing paper is the printing paper travel path 20. The printing roller and the transfer roller are both working rollers, one of which is the first working roller and the other is the second working roller. The contact part between the printing roller and the transfer roller is the printing paper station. The printing paper travel path has a winding path in front of the printing paper station. This winding path is the front winding path 23. The front winding path is a structure that matches the outer periphery of one of the working rollers.

[0053] To elaborate further, such as Figure 6 As shown, the work rollers used in the back winding route and the front winding route are different work rollers.

[0054] The above-mentioned settings of the present invention can better ensure the smooth implementation of changes to the printing paper path.

[0055] Furthermore, the arc α of the back winding path and the front winding path is 45 degrees.

[0056] The above-mentioned settings of the present invention can better ensure the smooth implementation of changes to the printing paper path.

[0057] The technical solution of the method for changing the direction of printing paper travel in this invention is implemented as follows: The method involves using a printing press for printing. The printing press has a frame, on which printing rollers and transfer rollers are mounted. Both the printing rollers and transfer rollers are work rollers, one being a first work roller and the other a second work roller. The contact point between the printing rollers and the transfer rollers is the printing paper station. Each work roller has a core in the middle, which is mounted on the frame. The core has a frame perpendicular to the cross-section of the printing paper station. At least one of the work rollers has a rubber layer in the middle. The rubber layer has a hollow core with a triangular or trapezoidal cross-section. A valve is connected to the hollow core, and the pressure inside the hollow core can be adjusted by adjusting the air pressure inside the hollow core. This adjustment of the air pressure inside the hollow core adjusts the positional relationship of the work roller core, thereby changing the direction of paper transport.

[0058] It is necessary to provide an explanation of the above-described embodiments of the printing assembly, including their principles and effects, for ease of understanding. This explanation can be used to illustrate the method of changing the direction of paper travel. Similarly, the above-described method of changing the direction of paper travel can be used to explain the principles and effects of the printing assembly. Those skilled in the art should understand this.

[0059] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A printing assembly, comprising a frame, and a transfer roller, a printing roller, and an ink roller mounted on the frame from top to bottom, with an ink trough below the ink roller, the ink roller extending into the ink trough, the ink roller being a component for dipping in ink, the ink roller contacting the printing roller, the ink roller transferring the ink dipped from the ink trough to the printing roller, the printing roller contacting the transfer roller, and the area between the contact points of the printing roller and the transfer roller being a printing section, wherein printing paper passes between the printing roller and the transfer roller to complete the printing process; characterized in that: The transfer roller and / or printing roller have a rubber layer on their outer periphery, and the rubber layer has a surrounding hollow core connected to a valve; both the transfer roller and the printing roller have a rubber layer on their outer periphery, and each rubber layer has a ring-shaped hollow core, which is a first hollow core, and the first hollow core is a right-side-wide triangular or trapezoidal structure; the frame has vertically oriented grooves, the transfer roller and the printing roller have a central shaft, a slider is located in the groove, the central shaft is mounted on the slider, and a spring is located in the groove, with the spring pressing against the slider.

2. The printing assembly according to claim 1, characterized in that: The rubber layer also has another annular hollow core, which is called the second hollow core. The second hollow core is not connected to the first hollow core and is a triangular or trapezoidal structure with a wider left side.

3. The printing assembly according to claim 2, characterized in that: The central shaft is hollow, and the hollow core is connected to the hollow core of the central shaft. A rotary joint is also connected to the central shaft, and the rotary joint is connected to the air supply source. The valve is installed between the rotary joint and the air supply source. The first hollow core and the second hollow core are respectively connected to the two ends of the central shaft.

4. The printing assembly according to claim 1, 2 or 3, characterized in that: There is also a metal material layer outside the rubber layer.

5. The printing assembly according to claim 1, 2 or 3, characterized in that: The valve is also equipped with a barometer, and a connecting column is provided in the middle of the hollow core.

6. The printing assembly according to claim 2 or 3, characterized in that: The sidewalls of the first and second hollow cores also have an inwardly curved structure.

7. The printing assembly according to claim 1, 2 or 3, characterized in that: The path of the printing paper on the printing assembly is the printing paper travel path. The printing roller and the transfer roller are both work rollers, one of which is the first work roller and the other is the second work roller. The contact point between the printing roller and the transfer roller is the printing paper station. The printing paper travel path has a winding path after the printing paper station. This winding path is the post-winding path. The post-winding path is a structure that matches the outer periphery of one of the work rollers.

8. A method for changing the direction of paper travel, using a printing press for printing, the printing press having a frame, on which printing rollers and transfer rollers are mounted, both of which are work rollers, one being a first work roller and the other a second work roller, the contact point between the printing rollers and the transfer rollers being the paper printing station, each work roller having a core in the middle, and being mounted on the frame via the core, the core having a frame perpendicular to the cross-section of the paper printing station, at least one of the work rollers having a rubber layer in the middle, the rubber layer having a hollow core with a triangular or trapezoidal cross-section, and a valve connected to the hollow core, the valve allowing adjustment of the pressure inside the hollow core, which adjusts the positional relationship of the work roller core by adjusting the air pressure inside the hollow core, thereby changing the direction of paper transport.

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