KR20180015022A - Non-slip roller and method for manufacturing the same - Google Patents

Abstract

A non-slip roller and a method for manufacturing the same are provided. The non-slip roller comprises a transfer roller which is inserted into a printer to transfer printing paper to a printing area. When transferring the printing paper, a pattern in which a plurality of protrusions are formed in at least a portion of a surface of the transfer roller can be formed to prevent a slip.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a non-slip roller,

The following embodiments relate to non-slip rollers and methods of making the same. More particularly, the present invention relates to a non-slip roller for preventing a sip phenomenon in transferring printing paper and a method of manufacturing the same.

With the development of digital cameras and smartphone cameras and the development of printer technology, it is becoming common for users to output photographs taken by digital cameras and smart phones using personal printers. Conventionally, a personal printer is generally a peripheral device of a computer and is difficult to have mobility because it is fixed in one place and must be printed on a photographic developing paper.

Accordingly, techniques for outputting photographs or images on a base surface or an ink material surface having high adhesive strength by a handy type printer that is easy to carry are being developed.

Korean Patent No. 10-1255346 relates to such a photo printer, and describes a technique relating to a portable photo printer.

Embodiments describe a non-slip roller and a method of manufacturing the same, more specifically, a technique of preventing a sip phenomenon in transferring a print sheet by forming a pattern in which a plurality of projections are formed on at least a part of the surface of the transfer roller to provide.

Embodiments relate to a non-slip roller having a predetermined pattern formed on a surface of a conveying roller made of a metal material to prevent a sip phenomenon during conveyance of the printing paper to improve print quality and nitriding the surface of the conveying roller, And a method for manufacturing the same.

A non-slip roller according to an exemplary embodiment includes a transfer roller inserted into a printer to transfer a print sheet to a print area. The non-slip roller includes a transfer roller for transferring the print sheet to a printing area, A pattern is formed in which a plurality of projections are formed on at least a part of the surface of the roller.

Wherein the conveying roller comprises: a cylindrical body; An engaging portion formed at both ends of the body so as to be rotatably installed in the printer; And a plurality of protrusions formed at both ends of the body and having a predetermined size, and the transporting roller may be made of a metal material.

The protrusions of the pattern portion may have a rhombic shape on the upper and lower surfaces, and may have a rectangular truncated cone shape having a larger width than the width of the upper surface.

Wherein the pattern portion has a shape in which a short diagonal line of the rhombus is arranged in the axial direction of the conveying roller and a long diagonal line of the conveying roller is arranged in parallel with two different sides of each of the projections The plurality of projections may be arranged in two extension lines passing through the center.

The protrusion of the pattern unit may have a height of 55 m or more.

The conveying roller may be nitrided to improve durability.

The conveying roller may be manufactured by a rack and pinion method using a flat die.

The transport roller is configured inside a portable compact thermal transfer printer connected to the terminal by wired / wireless communication, and is operable when a print file is received from the terminal, thereby transferring the print paper to the print area.

According to the embodiments, it is possible to provide a non-slip roller and a method of manufacturing the same, in which a pattern composed of at least a part of a plurality of projections is formed on the surface of the conveying roller to prevent a sip phenomenon in conveying the printing paper.

According to the embodiments, a predetermined pattern is formed on the surface of a conveying roller made of a metal material to prevent a sip phenomenon at the time of conveyance of the printing paper to improve the printing quality, and the surface of the conveying roller is nitrided, Roller and a method of manufacturing the same.

According to the embodiments, since the non-slip roller is manufactured by the rack and pinion method using the flat mold, the cost is reduced and the mold can be quickly modified and replaced.

1 is a view for explaining a portable thermal transfer printer according to an embodiment.
FIG. 2 is a view for explaining a configuration of a portable thermal transfer printer according to an embodiment.
3 is a perspective view illustrating a non-slip roller according to one embodiment.
Fig. 4 is a view showing an enlarged view of Fig. 3; Fig.
5 is a front view illustrating a non-slip roller according to one embodiment.
6 is a view for explaining the projection of the non-slip roller according to one embodiment.
7 is a view for explaining a pattern of a non-slip roller according to an embodiment.
8 is a view for explaining a manufacturing process of a non-slip roller according to an embodiment.

Hereinafter, embodiments will be described with reference to the accompanying drawings. However, the embodiments described may be modified in various other forms, and the scope of the present invention is not limited by the embodiments described below. In addition, various embodiments are provided to more fully describe the present invention to those skilled in the art. The shape and size of elements in the drawings may be exaggerated for clarity.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

Also, the terms " part, "" module," and the like, which are described in the specification, refer to a unit for processing at least one function or operation, and may be implemented by hardware or software or a combination of hardware and software.

It is to be understood that the components of the embodiments described with reference to the drawings are not limited to the embodiments and may be embodied in other embodiments without departing from the spirit of the invention. It is to be understood that although the description is omitted, multiple embodiments may be implemented again in one integrated embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

1 is a view for explaining a portable thermal transfer printer according to an embodiment.

A thermal transfer printer refers to a printer in which heat is applied to a thermal transfer ribbon on which a dye is applied to transfer the dye on the thermal transfer ribbon to a recording medium to be fixed.

Such a thermal transfer printer is classified into a sublimation type thermal transfer system (dye sublimation type) in which a dye is sublimated according to a thermal transfer method of a dye, and a fusion type thermal transfer system in which a dye is transferred while being melted by a thermal recording head.

1 is a portable thermal transfer printer according to an embodiment of the present invention in which a cartridge 4 is detachably installed inside a housing 2 of a printer shown in the drawing and a cassette 20 Can be detachably installed.

The cartridge 4 is a frame for accommodating a thermal transfer ribbon (or an ink sheet) 6, and includes a supply reel 8 for uncoiling and supplying the thermal transfer ribbon 6 during printing, Up reel 10 that winds and collects the reel 10 can be provided inside.

Here, the thermal transfer ribbon 6 is formed of a three-color dye layer of yellow (Y, Y), magenta (M), cyan (C) M, C, and K (black)) and an overcoat layer for coating may be sequentially applied. In addition, the edge may be printed with a code to allow the printer to identify the color.

The paper feed roller 30 may be installed above the inner end of the cassette 20 on which the printing paper is loaded so that the lower end of the paper feed roller 30 can be coupled to the upper end of the lever 32,

A conveying roller 34 capable of rotating by a power source (not shown) may be provided inside the paper feeding roller 30 so as to face the idle roller 36. [

Here, the conveying roller 34 may be manufactured by a rack and pinion method using a flat mold.

The method of manufacturing the conveying roller 34 by a rack and pinion method using such a balanced mold can manufacture the conveying roller 34 at a lower cost than the method of manufacturing the conveying roller by the conventional rolling method, The mold can be modified and replaced quickly. In addition, the spike method can not be mass-produced by a manual method, and there is a difference in quality due to lot differences, and the distribution of the quality distribution is the distribution of the upper limit value and the lower limit value. .

On the other hand, the thermal transfer head 38 can be fixedly installed above the inner side of the conveying roller 34 and the idler roller 36.

A platen 40 is coupled to the upper end of the lift lever 42 which is pivotally supported in the body and can be vertically elevated below the thermal transfer head 38.

In such a portable thermal transfer printer, when a print command is input, the lever 32 rotates in the clockwise direction around the hinge at the lower end so that the feed roller 30 rotates clockwise, 12 so that one sheet of printing paper 12 loaded on the cassette 20 can be conveyed between the conveying roller 34 and the idle roller 36. [ That is, the conveying roller 34 and the idle roller 36 can convey the printing paper 12.

The conveyance of the printing paper 12 is stopped immediately before the printing paper 12 is conveyed to the exit 44 provided on the opposite side of the cassette 20. When the conveyance of the printing paper 12 is completed, the lift lever 42 is rotated, Is pressed against the thermal transfer head 38 with an appropriate pressure therebetween with the thermal transfer ribbon 6 and the printing paper 12 sandwiched therebetween and the feed roller 34 and the feed reel 8 and the take-up reel 10 are rotated The thermal print head 38 generates heat and printing of the yellow (Y) color can be started.

After the printing of the yellow (Y) color is completed, the printing of the magenta (M) color, the cyan (C) color and the coating layer is performed in the same manner . ≪ / RTI >

The printing paper 12 is printed while passing between the thermal transfer ribbon 6 and the platen 40. The printing surface is in contact with the thermal transfer ribbon 6 and the opposite surface is in contact with the platen 40 As shown in FIG. The dye applied to the thermal transfer ribbon 6 is sublimated by the heat emitted from the thermal transfer head 38 while the thermal transfer ribbon 6 is in close contact with the printing paper 12 and is transferred onto the printing paper 12 .

One color is transferred to the printing paper 12 as the printing paper 12 passes once through the printing area and the thermal transfer ribbon 6 and the printing paper 12 and the platen 40 move at the same speed Or printing while rotating. If the releasing speed of the thermal transfer ribbon 6 does not match the moving speed of the printing paper 12, the dye is spread due to the slip phenomenon of the printing paper 12, so that the image is not printed clearly. Therefore, the conveying roller 34 is constituted by a non-slip roller, and by conveying the printing paper 12, a slip does not occur during conveyance, and when the photograph is printed by the thermal transfer method, .

Thereafter, when printing is completed, the printing paper 12 can be discharged through the outlet 44. [ At this time, it is possible to further include a separate drawing roller for moving the printing paper 12, which has been printed, to the outlet 44.

In order to print in the color set in this manner, yellow (Y), magenta (M) and cyan (C) colors (or Y, M, C and K) are sequentially printed. (12) repeatedly advances and retreats. At this time, when the printing paper 12 is printed up to the rear end, the front end of the printing paper is discharged to the outside of the printer and can be pulled back for printing of the next color. Further, the printing paper 12 may be discharged to the outside of the printer after completing all printing processes inside the printer housing.

On the other hand, in the portable thermal transfer printer, the thermal transfer ribbon and the paper cartridge may exist separately as described above, but the thermal transfer ribbon and the paper cartridge may be formed as one.

The portable thermal transfer printer according to one embodiment uses a color cartridge in the form of ribbon in which sublimable dyes of yellow (Y), magenta (M), and cyan (C) colors (or Y, M, C and K) And the thermal transfer ribbon has a solid state dye, so that the dye can be printed by depositing the dye on the print paper by the heat of the thermal head when printing. At this time, the amount of ink to be sublimated and transferred can be adjusted according to the amount of heat of the thermal head. The portable thermal transfer printer according to this embodiment produces a continuous tone image, so that even if the dpi is low, a very high image quality can be obtained.

For example, when the resolution of the printer is 200 to 400 dpi, the representation of each color (C, M, Y) is divided into 256 gradations, so that the color of 16.7 million color images can be reproduced. This reproduced color can be expressed in subtle color gradation, resulting in clear prints that are almost identical to normal picture quality.

In addition, instead of using thermal transfer ribbons, heat can be applied to print paper containing dye molecules to print photos. This can reduce the maintenance cost by eliminating the need for separate ink and cartridge in the zero ink system.

FIG. 2 is a view for explaining a configuration of a portable thermal transfer printer according to an embodiment.

Referring to FIG. 2, the portable thermal transfer printer 1 according to an embodiment may include a conveying roller 100 and a cartridge 200 inside a housing.

The conveying roller 100 conveys the printing paper to the printing area so that the printing paper is conveyed to the printing area and printing can be performed through the thermal transfer ribbon of the cartridge 200. [

The portable thermal transfer printer 1 sequentially prints yellow (Y), magenta (M) and cyan (C) colors (or Y, M, C and K) The printing paper can be repeatedly advanced and retreated by the feeding roller 100 every time printing is performed.

At this time, when the printing paper is printed to the rear end, the front end of the printing paper is discharged to the outside of the printer and can be fed again for printing of the next color. Further, the printing paper can be discharged outside the printer after completing all printing processes inside the printer housing.

The conveying roller 100 is composed of non-slip rollers, and by transferring the printing paper, slip does not occur during conveyance, and when the photo is printed by the thermal transfer method, the conveying roller 100 rotates at a constant speed to improve printing quality.

The conveying roller 100 may be made of a metal material, and a pattern having a plurality of protrusions formed on at least a part of the surface of the conveying roller may prevent a sip phenomenon in conveying the printing paper.

For example, a pattern portion having a plurality of projections is formed in a predetermined region at both ends of the conveying roller 100. The protrusions of the pattern portion may have a rhombic shape on the upper and lower surfaces, and may have a rectangular truncated cone shape having a wider width than a width of the upper surface. have.

The pattern part has an angle of 25 to 75 degrees between extension lines passing through the center of the rhombus with respect to the underside of the projection and a diagonal line of the rhombus is parallel to the conveying direction of the conveying roller and a long diagonal line is parallel to the axis of the conveying roller The printing quality can be improved by preventing a sip phenomenon when the printing paper is fed.

In addition, the conveying roller 100 can be manufactured by a rack and pinion method using a flat metal mold.

The transfer roller 100 may be nitrided to improve durability.

The cartridge 200 can be detachably installed inside the housing of the printer.

On the other hand, a cassette on which printing paper is loaded can be detachably installed on one side of the printer. In the portable thermal transfer printer, the thermal transfer ribbon and the paper cartridge may be integrated.

1, the cartridge 200 is a frame for accommodating a thermal transfer ribbon (or ink sheet). The cartridge 200 is wound around a supply reel which uncovers and supplies the thermal transfer ribbon during the printing process, And a take-up reel can be provided inside.

The portable thermal transfer printer can be connected to a terminal and receive a print file. More specifically, a portable thermal transfer printer can be connected to an application installed in a smart device such as a smart phone through wired / wireless communication and receive a print file. For example, a portable thermal transfer printer can be connected to a terminal through Bluetooth, Wi-Fi, short-range wireless communication (NFC), and the like.

Fig. 3 is a perspective view showing a non-slip roller according to an embodiment, and Fig. 4 is a view showing an enlarged view of Fig. 5 is a front view of the non-slip roller according to one embodiment.

3 to 5, a non-slip roller according to an embodiment may include a conveying roller 100 inserted into a printer to convey a printing sheet to a printing area. Here, the conveying roller 100 may constitute at least a part of a non-slip roller or a non-slip roller.

The conveying roller 100 may be made of a metal material and may be formed with a pattern composed of at least a part of a plurality of projections on the surface of the conveying roller to prevent a sip phenomenon in conveying the printing paper.

On the other hand, when the conveying roller is made of a rubber raw material such as silicone, urethane or NBR, static electricity is generated and the printing quality is poor.

A predetermined pattern is formed on the surface of the conveying roller 100 made of a metal material to prevent a sip phenomenon in conveying the printing paper to improve the printing quality and nitriding the surface of the conveying roller 100, .

The conveying roller 100 may include a body 110, an engaging portion 120, and a pattern portion 130.

The body 110 has a cylindrical shape and may be made of a metal material.

The latching part 120 may be formed at both ends of the body 110 so as to be rotatably installed inside the printer. That is, the engaging portion 120 may be formed in the inside of the print for the positioning of the conveying roller 100.

The pattern unit 130 may have a predetermined size at both ends of the body 110 and may include a plurality of protrusions 131.

The protrusion 131 of the pattern unit 130 may have a rhombic shape on its upper and lower surfaces and may have a rectangular truncated cone shape having a wider area than a width of the upper surface.

For example, the protrusion 131 has an angle of 25 to 75 degrees between the two extension lines passing through the center of the rhombus on the basis of the rhombic bottom face, the short diagonal line of the rhombus is the advancing direction of the feed roller 100, And may be a rhombic shape arranged in the axial direction of the roller 100. [

More specifically, the protrusions 131 may be formed at an angle of 25 to 75 degrees between two extension lines parallel to two different sides of the rhombus passing through the center of the rhombus, with respect to the lower surface of the rhombus. At this time, the lower surface of the protrusion 131 may have a rhombic shape having an angle of 25 to 75 degrees and another angle of 155 to 105 degrees. In addition, the lower surface of the protrusion 131 as well as the upper surface thereof may be in the shape of a rectangular truncated pyramid having the same rhombus shape as the lower surface.

For example, the protrusion 131 may be formed at an angle of 30 degrees between two extension lines passing through the center of the rhombus on the basis of the lower surface of the rhombic shape. Here, a short diagonal line of the rhombus may be a rhombic shape in which the conveying roller 100 advances and long diagonal lines are arranged in the axial direction of the conveying roller 100.

The plurality of protrusions 131 of the pattern unit 130 may be arranged in a rhombus shape other than 0 degree, 90 degree, or 45 degree arrangement, and may be arranged in the same shape as the top surface and the bottom surface of the protrusion 131 .

By configuring the conveying roller 100 in which the plurality of projections 131 having a rectangular truncated pyramid shape having the upper and lower surfaces of rhombo are arranged as described above, the projections 131 having a rectangular truncated pyramid shape with the upper and lower surfaces being square and / A sip phenomenon can be prevented by fixing the position more reliably than when conveying the printing paper forward and backward by using the conveying roller having the arrangement of the plurality of projections 131 of the plurality of projections 131. [

Particularly, the pattern unit 130 can be formed with a distance of about 0.5 mm between the plurality of protrusions 131.

The protrusion 131 of the pattern unit 130 may have a height of 30 m or more. Particularly, the protrusion 131 of the pattern unit 130 has a height of 55 m or more, thereby preventing a sip phenomenon in conveying the printing paper, thereby improving the printing quality.

Further, the conveying roller 100 may be nitrided to improve durability.

Nitriding is one of the surface hardening methods, in which nitrogen is penetrated into steel to harden the surface, thereby preventing the surface hardness from becoming large and deforming.

For example, the transporting roller 100 may be nickel plated, but is less durable than the nitriding transporting roller 100.

The conveying roller 100 may be manufactured by a rack and pinion method using a flat die. For example, the conveying roller 100 may be formed by a rolling method in which two rollers are rotated while paper passes through the space, but the mold cost is higher than that of the rack and pinion method, slow.

The flat die moves linearly to manufacture the feed roller 100. Therefore, by manufacturing the conveying roller 100 in a rack and pinion method using a flat mold, the mold cost can be reduced and the mold can be quickly modified or replaced.

The transfer roller 100 is configured inside a portable compact thermal transfer printer connected to a terminal by wired / wireless communication, and is operated when a print file is received from a terminal, thereby transferring the print paper to the print area.

The non-slip roller according to an exemplary embodiment of the present invention transfers a print sheet to a printer cartridge, and no slippage occurs on the print sheet when the sheet is transported. When a photo is printed by the thermal transfer method, So that the printing quality can be improved by feeding the printing paper at a constant speed.

6 is a view for explaining the projection of the non-slip roller according to one embodiment.

Referring to FIG. 6, the protrusion 131 formed on the pattern unit 130 of the non-slip roller according to an exemplary embodiment of the present invention includes a pattern unit 130 formed on both ends of the body 110, 131 may be constructed.

The protrusions 131 of the pattern unit 130 may have a rhombic shape on the upper and lower surfaces thereof and may have a rectangular truncated cone shape having a wider width than the width of the upper surface.

At this time, the protrusion 131 of the pattern unit 130 may have a height of 30 m or more. Particularly, the protrusion 131 of the pattern unit 130 has a height of 55 m or more, thereby preventing a sip phenomenon in conveying the printing paper, thereby improving the printing quality.

7 is a view for explaining a pattern of a non-slip roller according to an embodiment.

Referring to FIG. 7, the pattern unit 130 of the non-slip roller according to an exemplary embodiment may include a plurality of protrusions 131 at predetermined regions on both ends of the body.

Each of the protrusions 131 of the pattern unit 130 may have a rhombic shape on its lower surface. Each of the protrusions 131 of the pattern unit 130 may be formed in a rhombus shape as well as a lower surface thereof and may have a rectangular truncated cone shape having a wider width than a width of the upper surface. At this time, each of the projections 131 may have an angle of 25 to 75 degrees between extension lines passing through the center of the rhombus. Here the extension line is parallel to the two different sides of the rhombus and can be two extension lines passing through the center of the rhombus.

The angle between the extension lines of the diagonal line passing through the center of the rhombus is 25 to 75 degrees with respect to the lower surface of each projection 131. The short diagonal line of the rhombus is the advancing direction of the conveying roller and the long diagonal line is the axial direction of the conveying roller Lt; / RTI >

And a plurality of other projections 131 may be arranged in the extension line passing through the center parallel to the other side with respect to the lower side of each projection 131. At this time, the interval between the protrusions 131 may be about 0.5 mm.

8 is a view for explaining a manufacturing process of a non-slip roller according to an embodiment.

Referring to FIG. 8, the non-slip roller (conveying roller) can be manufactured in a rack and pinion manner using a flat mold.

A predetermined area pattern 130 may be formed on both ends of the body 110 of the flat metal mold. Here, the pattern unit 130 may include a plurality of protrusions.

For example, the protrusion of the pattern unit 130 may have a rhombic shape on the upper and lower surfaces, and may have a rectangular truncated cone shape having a wider area than a width of the upper surface.

The pattern unit 130 has an angle of 25 to 75 degrees between extension lines passing through the center of the rhombus with respect to the underside of the projection, a short diagonal line of the rhombus is a traveling direction of the conveyance roller 100, A plurality of protrusions can be arranged in the extension line by being arranged in the axial direction of the housing 100. And the interval between many of the stone periods may be about 0.5 mm.

The protrusion of the pattern unit 130 may have a height of 30 탆 or more. In particular, the protrusion of the pattern unit 130 has a height of 55 m or more, thereby preventing a sip phenomenon in the conveyance of the printing paper, thereby improving the printing quality.

At this time, the surface of the flat mold can be nitrided to improve the durability.

Nitriding is one of surface hardening methods. Nitrogen is penetrated into steel to harden the surface, so that the surface hardness is large and deformation is prevented.

The flat die may be linearly moved to be a conveying roller 100 by a rack and pinion method. As described above, the feed roller 100 is manufactured by a rack and pinion method using a flat die, thereby reducing the cost of the die and enabling rapid mold modification or replacement.

As described above, according to the embodiments, it is possible to provide a non-slip roller and a method of manufacturing the same, in which a pattern in which a plurality of protrusions are formed on at least a part of the surface of the transport roller prevents a sip phenomenon in transporting the print paper .

In addition, according to the embodiments, a predetermined pattern is formed on the surface of a conveying roller made of a metal material to prevent a sip phenomenon when the printing paper is conveyed, thereby improving the printing quality, nitriding the surface of the conveying roller, good.

According to the embodiments, the manufacturing cost can be reduced by manufacturing a conveying roller by a rack and pinion method using a balanced mold, and the mold can be quickly corrected and replaced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

Claims (8)

In a non-slip roller,
A conveying roller that is inserted into the printer and feeds the printing paper to the printing area
Lt; / RTI >
And a pattern in which a plurality of projections are formed on at least a part of the surface of the conveying roller to prevent a sip phenomenon during conveyance of the printing paper
/ RTI > The method according to claim 1,
The conveying roller
A cylindrical body;
An engaging portion formed at both ends of the body so as to be rotatably installed in the printer; And
A plurality of protrusions formed at both ends of the body,
Lt; / RTI >
Wherein the conveying roller is made of a metal material. 3. The method of claim 2,
The protrusion of the pattern portion
Wherein the upper surface and the lower surface are formed in a rhombic shape and have a rectangular truncated cone shape having a larger width than the width of the upper surface. The method of claim 3,
The pattern unit may include:
A short diagonal line of the rhombus is arranged in the axial direction of the conveying roller and a long diagonal line of the conveying roller is arranged in parallel with two different sides of each of the projections, Wherein the plurality of projections are arranged in an extension line of the non-slip roller. 3. The method of claim 2,
The protrusion of the pattern portion
Wherein the height of the non-slip roller is 55 占 퐉 or more. The method according to claim 1,
The conveying roller
Characterized in that the surface is nitrided for improved durability. The method according to claim 1,
The conveying roller
The non-slip roller is manufactured by a rack and pinion method using a flat mold. The method according to claim 1,
The conveying roller
And a controller for controlling the operation of the non-slip roller. The non-slip roller according to claim 1, wherein the non-volatile memory is a non-volatile memory.

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