KR101855844B1 - Roll to roll reverse offset printing apparatus and method of alignment for using the same - Google Patents

Abstract

More particularly, the present invention relates to a roll to roll reverse offset printing apparatus, and more particularly, to a roll to roll reverse offset printing apparatus in which a substrate is tensioned by thermal deformation due to printing and curing in a roll to roll reverse offset printing process using a roll type substrate, In order to solve the problem that it is difficult to adjust the overlay accuracy when the pattern is deformed due to the contraction of the pattern and the overlapping printing of the next layer is performed, .

Description

[0001] The present invention relates to a roll to roll reverse offset printing apparatus and an aligning method thereof,

More particularly, the present invention relates to a roll to roll reverse offset printing apparatus, and more particularly, to a roll to roll reverse offset printing apparatus in which a substrate is tensioned by thermal deformation due to printing and curing in a roll to roll reverse offset printing process using a roll type substrate, In order to solve the problem that it is difficult to adjust the overlay accuracy when the pattern is deformed due to contraction and the next layer is overprinted, a roll capable of correcting errors due to substrate deformation by adjusting the tension of the roll- To-roll reverse offset printing apparatus.

Lithography techniques have been widely used in conventional electronic device fabrication techniques. However, in order to constitute an actual process using the lithography technique, various complicated processes such as vacuum deposition, exposure, development, plating or etching are required, and the process design and device configuration are complicated. In addition, due to the development of micro-technologies in various fields, a method has been sought for making an integrated circuit differently from photolithography.

Electronic printing is a technique of manufacturing an electronic device by simply performing a printing process. Since electronic printing can fundamentally eliminate the process complexity inherent in the photolithography process by replacing the photolithography process described above, researches have been actively conducted in recent years, such that the application range is expanded to various fields. Non-contact printing technologies include inkjet, spray, and slot die coating. Contact-type printing technologies include gravure, gravure offset, reverse offset, and screen printing.

1, the reverse offset printing apparatus includes a base 12 to which a conductive ink I is applied, a cliche CL, and a roller 11, as shown in Fig. 1, A substrate 14 and a table 15 for supporting them.

At this time, the roller 11 contacts the base 12, and the conductive ink I is transferred from the base 12 to the roller 11 side. 2, the roller 11 is brought into contact with the cliche CL so that the unnecessary pattern I-2 on the roller 11 is turned off toward the cliche CL, The substrate 14 is brought into contact with the substrate 14 to set a necessary pattern I-1 on the substrate 14.

The cliche CL includes a plurality of protrusions CL2 so that the protrusions CL2 come into contact with the roller 11 to transfer an unnecessary pattern I-2 onto the protrusions CL2, And the conductive ink I is not transferred in the recessed portion CL1 between the protrusions CL2 so that a necessary pattern I-1 remains on the roller 11. As a result,

As a related technology, there is a domestic registered patent No. 1057021 (registered on August 8, 2011, name: patterning device and pattern printing device of base exchange method).

On the other hand, in recent semiconductor manufacturing technology, a flexible substrate made of film rather than a rigid substrate has been used. When such a film type substrate is used, the process speed is increased and mass production is possible. The combination of the roll-to-roll production method and the electronic printing technology is very active in that the production efficiency can be further increased by combining the electronic printing technology as described above ought.

However, in the electronic printing method using such a roll type substrate, the substrate is stretched or shrunk to cause pattern deformation, and when the next layer is overprinted, the overlay accuracy can not be adjusted.

In addition, there is a problem that the substrate is stretched even by the tension applied in the process of winding or unwinding the roll-type substrate, resulting in an error in the printing position, which makes it difficult to perform superimposing printing accurately.

Therefore, it is necessary to develop a technology that can calibrate it.

Domestic registered patent No. 1057021 (registered on Aug. 10, 2011, name: pattern changing device and pattern printing device of base exchange method)

SUMMARY OF THE INVENTION An object of the present invention is to provide a method and apparatus for forming a pattern on a substrate by stretching or shrinking the substrate due to thermal deformation due to printing and curing and tension applied in the longitudinal direction during a roll to roll reverse offset printing process using a roll- And more particularly, to a roll to roll reverse offset printing apparatus capable of correcting an error due to substrate deformation by adjusting the tension of a roll-type cliche in order to solve the problem that it is difficult to adjust the overlay accuracy when superimposing layers.

The roll-to-roll reverse offset printing apparatus of the present invention comprises a first unwinder formed to include a roll formed by winding a web-shaped clithe and wound on the clithe, and a second unwinder disposed on the opposite side of the first unwinder, And a cliché photographing section for photographing a clatheline mark formed on the cliche, wherein the tension of the cliché film fed between the first unwinder and the first winder is A roll-type cliché feeder including a first tension regulating portion for regulating the roll tension; A second unwinder disposed on a side of the roll type clithe feeder in a width direction and including a roll formed by winding a substrate in a web form to unwind the substrate; A roll-type substrate supply device including a second winder disposed on a side of the substrate for winding the substrate, a curing unit for curing the printed pattern, and a substrate photographing unit for photographing a substrate alignment mark formed on the substrate; And a reverse offset printing roller which is transported in a width direction perpendicular to a feeding direction of the cliche and the substrate, contacts the cliche first to turn off an unnecessary pattern, and prints only a necessary pattern on the substrate. And a control unit. In this case, the first tension adjusting unit may adjust the substrate tension so that the substrate tension of the substrate is measured by comparing the size of the substrate alignment marks measured by the substrate photographing unit before and after the deformation of the substrate, And the tension of the clithe film is adjusted so as to match the size of the clithe film.

The first tension adjusting unit may be disposed between the first roller printing unit and the first unwinder in a region in contact with the reverse offset printing roller. The first tension adjusting unit may adjust the speed of the cliché, 1 infiltration; A first tension sensor disposed between the first inflator and the first roller printing portion to measure the tension of the cloak; A cliché photographing unit disposed between the first roller printing unit and the first winder to photograph the cliché; A first controller for controlling operations of the first absorber, the first winder and the first winder according to the results measured by the first tension sensor and the cliché photographing unit; As shown in FIG.

The first inflator may be provided on both sides of the cliche that is wound around the first unwinder, and may be rotated at a constant speed by a motor to push the cliche in the advancing direction.

In addition, the first unwinder and the first winder can adjust the tension of the cliché film by controlling the motor torque or the friction force of the clutch by the first control unit.

In addition, at least one or more cliches photographing units may be provided, and images captured by the first control unit may be captured by photographing the cliché alignment marks formed on the cliches.

In addition, the roll type clithe feeding device may include at least one or more cleaning units between the clit photo taking unit and the first winder, and a cleaning unit for cleaning the clithe.

The roll-to-roll reverse offset printing apparatus may further include a second tension adjusting unit formed on the roll-type substrate feeding apparatus to adjust the tension of the substrate.

The second tension controller may be disposed between the second roller printing unit and the second unwinder in a region in contact with the reverse offset printing roller, 2 infiltrators; A second tension sensor disposed between the second absorber and the second roller printing unit to measure the tension of the substrate; A second controller for controlling operations of the second absorber, the second unwinder, and the second winder according to the results measured by the second tension sensor and the substrate photographing unit; . ≪ / RTI >

The roll type clithe feeding device further includes a pressure roller disposed between the first unwinder and the first roller printing portion and supporting and rotating one side of the cliche, A cliché forming part including an engraving roller which pressurizes and forms a cliché pattern; As shown in FIG.

Further, the imprinting roller may include a heating means for heating the cliche.

In addition, the roll-type cliche feeder may be formed through a cliche imprinting process.

In addition, the roll-to-roll reverse offset printing apparatus may be provided with a deformation prevention plate made of a paper material on the rear surface of the substrate.

The roll-to-roll reverse offset printing apparatus may be a means in which the curing means formed on the roll-type substrate feeding apparatus is cured by thermal curing or photo-curing.

A method for aligning a roll to roll reverse offset printing apparatus according to the present invention includes the steps of: a) measuring a substrate strain to measure a change in length or width of the substrate; b) adjusting the tension of the closure so as to correspond to the substrate strain measured at the substrate strain measuring step; .

In addition, the step of adjusting the cleavage tension may include: 1) a speed adjusting step in which the cloak wound from the first unwinder is adjusted in the unwinding speed by the first inflator; 2) a photographing step of photographing the cliché alignment mark of the cliche by the cliché photographing unit; 3) a measurement step of measuring the alignment accuracy by comparing the substrate alignment mark photographed by the substrate photographing unit with an image photographed by the first control unit from the cliché photographing unit; 4) a feedback step of adjusting the torque value of the first winder according to the alignment accuracy measured by the first control unit, or adjusting the friction force of the clutch formed in the first winder to adjust the tension of the cliche; . ≪ / RTI >

The method of aligning the roll-to-roll reverse offset printing apparatus may further include: c) measuring a width of the cliche or the substrate; d) The relative speed of the reverse offset printing roller passing through the first roller printing portion or the second roller printing portion which is an area in contact with the reverse offset printing roller is adjusted so that the error due to the width change of the cliche or the substrate is compensated A relative speed adjusting step; . ≪ / RTI >

Further, in the relative speed adjusting step, the relative speed of the region where the reverse offset printing roller and the cliche contact with each other is adjusted in the first roller printing portion, or the reverse offset printing roller and the substrate are brought into contact with each other The relative speed of the region can be adjusted.

Accordingly, even if deformation of the substrate occurs due to tensile stress applied to the substrate or thermal deformation in the curing process, the tension of the cliche is adjusted according to the strain of the substrate, or the radius of the reverse offset printing roller is adjusted, By performing the correction, the accuracy of the reverse offset printing can be greatly improved, and especially the superimposed printing can be performed.

In addition, the present invention can adjust the tensile force of the substrate as well as the tension of the cliche, thereby maximizing the error correction effect.

Further, in the present invention, even if ink is applied to the cliche by the reverse offset printing roller, it is advantageous that the cliche can be used more than once by allowing the cleaning means to pass through the process of winding the clit film again.

In addition, the roll to roll reverse offset printing apparatus of the present invention can prevent the generation of a large amount of waste solution by making it possible to use once or several times without cleaning the cleanser, and it is possible to reduce the cost by eliminating the need for a large- There is an advantage to be able to do.

In addition, the roll to roll reverse offset printing apparatus of the present invention can minimize the thermal deformation of the substrate by using a substrate having a deformation preventing plate of paper material resistant to thermal deformation at the back thereof.

1 is a configuration diagram showing a conventional reverse offset printing apparatus;
FIG. 2 and FIG. 3 are conceptual diagrams illustrating a reverse offset printing method. FIG.
4 is a perspective view schematically showing the arrangement of a substrate, a cliche and a reverse offset printing roller in a reverse offset printing apparatus according to the present invention.
Figures 5 to 9 are block diagrams illustrating various embodiments of roll type clinker supply devices according to the present invention.
9 is a perspective view schematically showing a reverse offset printing apparatus according to the present invention.
10 is a conceptual view schematically showing a cliche forming portion of a roll type clithe feeding device according to the present invention.
11 is a configuration diagram showing an embodiment of a roll-type substrate supply apparatus according to the present invention.
12 is a flowchart showing an aligning method of a roll to roll reverse offset printing apparatus according to the present invention.
13 is a flowchart showing details of the tension adjusting step in the aligning method of the roll to roll reverse offset printing apparatus according to the present invention.

Hereinafter, a roll to roll reverse offset printing apparatus of the present invention having the above-described configuration will be described with reference to the drawings.

4, the roll-to-roll reverse offset printing apparatus 10 of the present invention mainly includes a roll-type cleansing feeder 1, a roll-type substrate feeding apparatus 2 and a reverse offset printing roller 630, .

The roll-to-roll reverse offset printing apparatus 10 of the present invention is characterized in that even if deformation of the substrate occurs due to tensile force applied to the substrate or thermal deformation in the curing process, the tension of the cloak fed from the roll- So as to correct the error by deforming the cliche so as to correspond to the substrate strain.

The roll type clithe feeding device 1 includes a first unwinder 100 formed to include a roll having a web-shaped clithe wound thereon to unwind the cloak C, A first winder 200 arranged on the opposite side of the first winder 200 for winding the cliche C and a second winder 200 for moving the cliche C And a first tension adjusting unit 400 for adjusting the tension.

The roll-type substrate supply device 2 includes rolls formed by winding a web-shaped substrate, which is disposed on one side in the width direction of the roll-type clizzard supply device 1, A second winder 620 arranged on the opposite side of the second unwinder 610 to wind the substrate S, and a second winder 620 for coiling the printed pattern, , And a substrate photographing section 730 for photographing the substrate S. The substrate S is irradiated with ultraviolet rays.

The reverse offset printing roller 630 is transported in a width direction perpendicular to the supply direction of the cliche C and the substrate S and comes into contact with the cliche first to turn off unnecessary patterns , And prints only necessary patterns on the substrate.

First, the roll type clithe feeding device 1 will be described.

As shown in the drawing, the first unwinder 100 is equipped with a roll having a web-shaped cliche C wound thereon, and serves to unwind and supply the cliche C.

The roll to roll reverse offset printing apparatus 10 of the present invention is not intended to be applied to a rigid substrate S and a cliche C in the form of a plate but to a flexible substrate S and a cliche C The substrate S and the cliche C used in the roll to roll reverse offset printing apparatus of the present invention are webs.

The first winder 200 is disposed on the opposite side of the first unwinder 100 to wind the cliche C.

At this time, the cliche C in a state in which the pattern is already impressed may be unwound from the first unwinder 100, but the roller printing unit 110 The cliché forming part 300 is provided at the front end so that the cliche C can be directly printed.

The clizer forming part 300 is provided between the first unwinder 100 and the first winder 200 for engraving a certain pattern on the cliche C, And a stamping roller 320 for pressing the other side of the cliche C together with the pressing roller 310 to form a pattern.

10, the cliche forming unit 300 may be configured such that the pressing roller 310 is disposed below the cleanser C and the imprinting roller 320 is disposed above the cleanser C .

When the cleanser C passes between the pressure roller 310 and the impression roller 320, the impression roller 320 presses the cliche C to remove the pattern Respectively.

That is, if the advancing direction of the cliche C progresses from left to right on the basis of FIG. 10, the pressure roller 310 is rotated in the clockwise direction, and the impression roller 320 is rotated by the pressure roller 310 And is rotated in a counterclockwise direction while pressing the cliche C.

The imprinting roller 320 may include a heating unit 330 for heating the cliche C. The heating unit 330 may be disposed inside the imprinting roller 320, .

The cliche (C) can form a pattern easily and inexpensively using a thermoplastic resin. As the thermoplastic resin, PMMA (ploymethyl-methacrylate) can be used. In addition, PC (Polycarbonate), PET (Polyethylene eterephthalate), PEN (Polyethylene ernaphthalate) and the like can be used.

The stomach is an example of making a thermal roll impression, and in other ways the cliche forming part may be made by imprinting.

The first tension adjuster 400 adjusts the tension of the cliche C transferred between the first unwinder 100 and the first winder 200, 410, a first tensile force sensor 420, a cliché photographing unit 430, and a first control unit 440.

The first absorber 410 is disposed between the first unwinder 100 and the first roller printing unit 110 and has a motor therein. The first absorber 410 is disposed between the first unwinder 100 and the first roller printing unit 110, You can push the cliche (C) and adjust the speed.

Here, the first roller printing unit 110 is a region where the cliché and the reverse offset printing roller 630 are in contact with each other, so that a pattern to be printed is formed on the surface of the reverse offset printing roller 630.

That is, the unnecessary pattern of the reverse offset printing roller 630 is turned off by the cliché C in the first roller printing unit 110.

5 to 9, the first inflator 410 may be disposed on the upper and lower surfaces of the cliche C, and may be rotated against each other to push the cliche C in the advancing direction.

The first tensile force sensor 420 is disposed between the first absorber 410 and the first roller printing unit 110 to measure the tensile force of the cliche C. It is a type of load cell, The method can be variously modified.

The cliché photographing unit 430 is disposed between the first roller printing unit 110 and the first winder 200 to photograph the cliché alignment mark and transmits the photographed image to the first control unit 440, .

The first control unit 440 controls the first inflator 410, the first unwinder 100 and the second inflator 400 according to the results measured by the first tension sensor 420 and the clit- 1 winder 200 according to the present invention.

Accordingly, the present invention is equipped with the first tension adjusting unit 400 for the roll type cliche so that the printing error can be minimized by adjusting the tension of the cliche C so as to correspond to the substrate strain, Superimposed printing such as three-degree printing can be precisely performed.

On the other hand, the operation of the reverse offset printing apparatus 10 of the present invention will be described generally.

The roll type substrate feeding device 2 is arranged on one side of the roll type clithe feeding device 1 so that the substrate C is positioned in parallel with the cliche C, After the unnecessary pattern of the reverse offset printing roller 630 is turned off by the cliche C and the pattern 630 is transferred in a direction perpendicular to the feeding direction of the cliche C and the substrate C, Is formed so as to be able to be printed on the substrate (C).

That is, the reverse offset printing roller 630 rotates so as to be transported in a direction perpendicular to the traveling direction of the cliche C, and contacts the cliche C so that unnecessary patterns on the surface are turned off.

At the same time, the cleanser C, which has turned off unnecessary patterns in contact with the reverse offset printing roller 630, is photographed by the cleanse photographing unit 430, and then, if necessary, Wound and discharged by the first winder 200, or reused.

In this process, the cliche C controls the tension by the first control unit 440 so as to perform precise printing.

Next, the reverse offset printing roller 630 is brought into contact with the substrate C in the form of a web which is unwound by the second unwinder 610 and conveyed to the second winder 620 side, (I.e., a pattern to be printed) on the substrate C, as shown in FIG.

In addition, the roll-to-roll reverse offset printing apparatus 10 of the present invention can minimize the thermal deformation of the substrate by using a substrate S having a deformation preventing plate made of paper resistant to thermal deformation at the back thereof.

At this time, the deformation preventing plate may be attached to the substrate S through a lamination process, and is separated from the substrate S after the process is completed.

In order to minimize the thermal deformation of the substrate, the roll-to-roll reverse offset printing apparatus 10 of the present invention is characterized in that the curing means 800 formed on the roll-type substrate feeding apparatus is a hot air, ultraviolet, visible, Or may be a means for curing by microwave irradiation.

In the case of photo-curing, since the heat applied to the substrate is less than the thermal curing method, deformation of the substrate can be minimized.

Hereinafter, various embodiments of the roll type clithe feeding apparatus of the present invention will be described with reference to FIGS. 5 and 9. FIG.

Example 1.

The roll type clithe feeding device 1 of the present invention shown in FIG. 5 is a most basic form and comprises a first unwinder 100, a first absorber 410, 1 tension sensor 420, a first roller printing unit 110, a cliché photographing unit 430, and a first winder 200 are disposed.

The first infuser 410 pushes the cliche C wound at a constant speed from the first unwinder 100 and adjusts the speed.

The first control unit 440 measures the strain of the substrate by comparing the size of the substrate alignment mark formed on the substrate before and after the substrate deformation through the image picked up by the substrate photographing unit 730, The cliché size of the clitoral mark photographed from the photographing unit 430 is measured to adjust the tension of the cliche C so as to correspond to the strain of the substrate.

Thereafter, the controller 440 improves the accuracy of the alignment by the closed loop system that changes the torque value of the first winder 200 so that the tension value of the cliche C changes according to the measured result.

The method of aligning the roll to roll reverse offset printing apparatus 10 of the present invention will be described based on the embodiment shown in FIG. 5,

A method of aligning a roll to roll reverse offset printing apparatus (10) of the present invention includes the steps of: a) measuring a substrate strain measurement (A100) for measuring a change in length or width of the substrate; b) And adjusting the tension of the cliche C so as to correspond to the strain of the substrate S that has been deformed.

In the substrate strain measuring step A100, the size of the substrate alignment mark photographed by the substrate photographing unit 730 may be compared with the initial size to determine the degree of deformation.

The cleansing tension adjusting step A200 may include: 1) a speed adjusting step (S100) in which the clippers (C) that are unwound from the first unwinder are controlled by the first absorber (410); 2) a photographing step (S200) of photographing the cleansing mark of the cleanser (C) by the cleansing photographing part (430); 3) In the first control unit 440, a measurement step (S300) for measuring the alignment accuracy by comparing with the substrate alignment mark photographed by the substrate photographing unit 730 through the image photographed from the clit- ); 4) Adjust the torque value of the first winder 200 according to the alignment accuracy measured by the first controller 440 or adjust the friction of the clutch formed in the first winder 200, A feedback step (S400) of adjusting the tension of the belt; . ≪ / RTI >

The feedback step S400 will be described in more detail. If the tension of the cliche C is to be increased according to the result measured in the step 3, The tension of the first winder 200 can be increased by adjusting the torque value of the first winder 200 so that the rotation speed of the first winder 200 is faster than the speed of the cliche C.

The method for aligning the roll-to-roll reverse offset printing apparatus of the present invention is a method for aligning the substrate S with a large tensile force or stretching due to thermal deformation to increase the cliche C, The forming portion 300 is provided so that the cliche C is reduced by the thermal roll engraving to increase the cliche C. The aligning force is adjusted by adjusting the tensile force of the pulling force so that the superimposed printing can be performed .

For example, since the elastic modulus of the PET film is about 3.3 to 4.0 Gpa, when the film thickness of 0.5 mm is added to the web width of 300 mm, the first control unit 440 increases the film thickness So that feedback is performed by means necessary for tension control.

However, when the substrate S is reduced or the cliche C is stretched, it can not be reduced by the tensile force. Therefore, a method of printing the size of the pattern printed on the cliche C smaller than the original size It can also be used.

In addition, the roll-to-roll reverse offset printing apparatus 10 of the present invention further includes a second tension adjusting unit 700 for adjusting the tension of the substrate on the roll-type substrate feeder as shown in FIG. 11, The adjustment of the tension of the substrate is selectively performed, thereby maximizing the printing error correction effect.

The second tension controller 700 is disposed between the second roller printing unit 640 and the second unwinder 610 that are in contact with the reverse offset printing roller 630, A second absorber 710 for regulating the speed of the substrate unwound from the unwinder 610; A second tensile force sensor 720 disposed between the second absorber 710 and the second roller print unit 640 to measure the tension of the substrate S; The operation of the second absorber 710, the second unwinder 610 and the second winder 620 according to the results measured by the second tension sensor 720 and the substrate photographing unit 730 A second control unit 740 for controlling the second control unit 740; As shown in FIG.

Example 2.

The roll-type clithe feeding device 1 of the present invention shown in FIG. 6 includes a first unwinder 100 in the traveling direction of the cliche C, a first inflator 410, a first tension sensor 420 A first roller printing unit 110, a cliché photographing unit 430, a cleaning unit 500, and a first winder 200 are disposed.

The roll type clinker supply device 1 shown in Fig. 6 is formed by further including a cleaning means 500, unlike the first embodiment.

The cleaning means 500 cleans the electronic printing ink (conductive ink) on the upper surface of the cliche C when the reverse offset printing is performed so that the cliche C is not discarded after a single use, Or more.

If the cliche C is continuously wound on the first winder 200 without the cleaning means 500, the ink overlaps the film on the upper surface during the winding process, and the accuracy of reusing may be lowered.

6, the first inflator 410 pushes the cliche C, which is unwound from the first unwinder 100 at a constant speed, and the speed .

The first control unit 440 measures the strain of the substrate by comparing the size of the substrate alignment mark formed on the substrate before and after the substrate deformation through the image picked up by the substrate photographing unit 730, The cliché size of the cleansing mark photographed from the photographing unit 430 is measured to adjust the tension of the cliche C so as to correspond to the strain of the substrate S. [

Thereafter, the first controller 440 controls the first winder 200 or the first absorber 410 to change the torque value of the clizer C according to the measured result, Improves alignment accuracy by the system.

The method of aligning the roll-to-roll reverse offset printing apparatus including the roll-type cleansing feeder of FIG. 6 is very similar to that of the second embodiment and therefore will not be described here.

Example 3.

The roll type clithe feeding device 1 of the present invention shown in FIG. 7 includes a first unwinder 100 in the traveling direction of the cliche C, a first inflator 410, a first tension sensor 420 A first roller printing unit 110, a cliché photographing unit 430, and a first winder 200 are disposed.

At this time, the first winder 200 is a winder connected with the clutch 210, and the friction force of the clutch 210 may be adjusted to adjust the tension.

The operation of the roll type clithe feeding device 1 of FIG. 7 will now be described. The first inflator 410 pushes the cliche C unwound from the first unwinder 100 at a constant speed, .

Thereafter, the first controller 440 adjusts the friction force of the clutch 210 of the first winder 200 so that the tension value changes according to the measured result, C) to improve the alignment accuracy.

Example 4.

The roll type CL supplying device 1 of the present invention shown in FIG. 8 comprises a first unwinder 100, a first absorber 410, and a second absorber 420 in the traveling direction of the film F for cleansing, 1 tension sensor 420 and first roller printing unit 110), a cliché photographing unit 430, a cleaning unit 500 and a first winder 200 are disposed.

At this time, the first winder 200 is a winder connected with the clutch 210, and the friction force of the clutch 210 may be adjusted to adjust the tension.

The roll type clithe feeding device 1 shown in Fig. 8 is formed by further including the cleaning means 500, unlike the third embodiment.

As described above, the cleaning unit 500 may clean the cliche C through the cliche forming unit 300, and the cliche C formed in the cliche forming unit 300 may be cleaned (Conductive ink) buried on the upper surface of the cliche C is cleaned when the reverse offset printing is performed during the process of feeding the cliche C to the developing unit 200, It can be used more than once.

The roll type clithe feeding device 1 shown in FIG. 8 is the same as that of the third embodiment except that the cleaning means 500 is further added, so that the description of the operation and the method of aligning will be omitted.

Example 5.

The roll type clithe feeding device 1 of the present invention shown in FIG. 9 includes a first unwinder 100 in the traveling direction of the cliche C, a first inflator 410, a first tension sensor 420 A first roller printing unit 110, a cleanse photographing unit 430, a cleaning unit 500 and a first winder 200. The first roller printing unit 110, And a cliché forming part 300 is further provided between the upper and lower parts 430 and 430.

That is, both the cliche (CL) printing and the reverse offset printing are performed during the course of the cliche C in the roll type clithe feeding device 1 of Fig.

The first winder 200 may be a winder connected to the clutch 210 and adapted to adjust the friction force of the clutch 210 in order to adjust the tension. Therefore, it is omitted.

Example 6.

In the sixth embodiment, in the roll to roll reverse offset printing apparatus 10 including the roll type clithe feeding apparatus 1 having various embodiments as in the first to fifth embodiments, the reverse offset printing roller 630, And the cliche C will be described.

The aligning method of the reverse offset printing apparatus of the present invention comprises the steps of: a) measuring a substrate strain (A100) for measuring a change in length or width of the substrate (C); b) adjusting the tension of the cliche (C) so as to correspond to the substrate strain measured at the substrate strain measuring step (A200); c) measuring a width (A300) of the cliche (C) or the substrate (S); d) a first roller printing unit 110 or a second roller printing unit (a second roller printing unit) which is an area in contact with the reverse offset printing roller 630 so as to compensate for the error caused by the width variation of the cliche C or the substrate S A relative speed adjusting step (A400) in which the relative speed of the reverse offset printing roller (630) passing through the reverse offset printing roller (640) is adjusted; .

The substrate strain measuring step A100 and the tension adjusting step A200 have already been described in the first to fifth embodiments and will not be described.

The tension adjusting step A200 is to increase or decrease the length in the advancing direction of the cliche C, that is, to adjust the length in the longitudinal direction in Fig.

However, the length of the cliche C may be increased or decreased by the force applied in the longitudinal direction by the first tension controller 400, and the length in the width direction may be increased or decreased. After the roll-to-roll printing, the length in the width direction during the curing process can be increased or decreased.

If such an error is not compensated, precise superposition becomes difficult in the reverse offset printing process, and the accuracy of the pattern formed is inevitably lowered.

Therefore, the aligning method of the reverse offset printing apparatus of the present invention is formed to include the width measuring step A300 and the relative speed adjusting step A400 so as to compensate the width variation of the cliche C.

In the relative speed adjusting step A400, the relative speed of the area where the reverse offset printing roller 630 and the cliche C contact with each other is adjusted in the first roller printing unit 110, The offset of the width of the cliche C or the substrate S can be compensated by controlling the relative speed of the region where the reverse offset printing roller 630 and the substrate S are in contact with each other.

Describing an example in which the relative speed is adjusted,

The reverse offset printing roller 630 and the reverse offset printing roller 630 at the first roller printing portion 110 which is the contact portion between the reverse offset printing roller 630 and the cleanser C, And the rotational speed at the contact point of the cliche C is the same, the relative speeds of the two are zero.

In this case, for example, the alignment marks at intervals of 100 mm can be printed at intervals of 100 mm. However, if the rotational speed of the reverse offset printing roller 630 is not equal to the rotational speed at the contact point of the reverse offset printing roller 630 and the cliche C, if an error of 1% occurs in the relative speed, The spacing error of the marks will be 1% and will be printed at intervals of 99 mm or 101 mm.

Using this characteristic, in the relative speed adjustment step A400, a relative speed error is generated deliberately to cause the reverse offset printing roller 630, the cliche C, or the reverse offset printing roller 630 and the substrate S ) To correct the alignment.

At this time, as a method of generating the relative error, there is a method of adjusting the rotational speed of the reverse offset printing roller 630 or adjusting the rotational speed of the reverse offset printing roller 630.

Accordingly, the aligning method of the roll to roll reverse offset printing apparatus according to the present invention can precisely print using the substrate S and the cliche C supplied in a roll-to-roll method.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It goes without saying that various modifications can be made.

1: roll-type clise feeder
2: Roll type substrate feeding device
10: Roll to roll reverse offset printing device
C: Cleveland
S: substrate
100: 1st un winder
110: first roller printing section
200: first winder 210: clutch
300: Clevis formation part
310: pressure roller 320: imprint roller
320: heating means
400: First tension control unit
410: first inflator 420: first tension sensor
430: cliché photographing unit 440: first control unit
500: cleaning means
610: 2nd unwinder 620: 2nd winder
630: Reverse offset printing roller 640: Second roller printing section
700: Second tension control unit
710: Second infiltrant 720: Second tension sensor
730: Substrate photographing unit 740: Second control unit
800: Curing means
S100 to S400: Step of subdividing the cleavage tension adjusting step
A100 to A400: Each step of the alignment method of the reverse offset printing apparatus

Claims (18)

A first winder formed on the opposite side of the first unwinder to wind the cliche, a first winder formed to include a roll formed by winding a web-shaped clithe to wind the clithe, And a first tension adjuster for adjusting the tension of the film for clithe to be transported between the first unwinder and the first winder, wherein the first tension adjuster comprises a cloisoner photographing section for photographing the cloisonelane mark formed on the rollers Type clithe feeder;
A second unwinder disposed on a side of the roll type clithe feeder in a width direction and including a roll formed by winding a substrate in a web form to unwind the substrate; A roll-type substrate supply device including a second winder disposed on a side of the substrate for winding the substrate, a curing unit for curing the printed pattern, and a substrate photographing unit for photographing a substrate alignment mark formed on the substrate;
A reverse offset printing roller which is conveyed in a width direction perpendicular to a feeding direction of the cliche and the substrate and contacts the cliche first to turn off an unnecessary pattern and then prints only a necessary pattern on the substrate; ≪ / RTI &
Wherein the first tension adjusting unit adjusts the size of the cleansing mark captured by the cliché photographing unit so as to correspond to the substrate strain measured through comparison of the size of the substrate alignment marks captured by the substrate photographing unit, And the tension of the clithe film is adjusted so that the tension of the film is adjusted.
The method according to claim 1,
The first tension controller
A first inflator disposed between the first roller printing portion and the first unwinder, which is an area in contact with the reverse offset printing roller, for adjusting the speed of the cloak extracted from the first unwinder;
A first tension sensor disposed between the first inflator and the first roller printing portion to measure the tension of the cloak;
A cliché photographing unit disposed between the first roller printing unit and the first winder to photograph the cliché;
A first controller for controlling operations of the first absorber, the first winder and the first winder according to the results measured by the first tension sensor and the cliché photographing unit; And the roll-to-roll reverse offset printing apparatus further comprises:
3. The method of claim 2,
The first infuser
Wherein the rollers are provided on both sides of the cliche that are unwound from the first unwinder, and are rotated at a constant speed by a motor to push the cliche in the direction of travel.
3. The method of claim 2,
The first un winder and the first winder
Wherein the motor torque or the frictional force of the clutch is controlled by the first control unit to adjust the tension of the film for clithe.
3. The method of claim 2,
The clit-
At least one,
Wherein the image picked up by the first controller is picked up by photographing the cliché alignment mark formed on the cliche.
3. The method of claim 2,
The roll-type clizzard feeder
And a cleaning means for cleaning the cliche, wherein the at least one cleaning unit is provided between the clit photo taking unit and the first winder.
3. The method of claim 2,
The roll-to-roll reverse offset printing apparatus
And a second tension adjusting unit formed on the roll type substrate feeder to adjust the tension of the substrate.
8. The method of claim 7,
The second tension controller
A second absorber disposed between the second roller printing portion and the second unwinder in a region in contact with the reverse offset printing roller and regulating the speed of the substrate fed from the second unwinder;
A second tension sensor disposed between the second absorber and the second roller printing unit to measure the tension of the substrate;
A second controller for controlling operations of the second absorber, the second unwinder, and the second winder according to the results measured by the second tension sensor and the substrate photographing unit; And a roll-to-roll reverse offset printing apparatus.
The method according to claim 1,
The roll-type clizzard feeder
A pressing roller disposed between the first unwinder and the first roller printing portion and supporting and rotating on one side of the cliche; and an engraved roller which forms a cliche pattern by pressing the other side of the cliche together with the pressing roller A cliché forming part including a cliché forming part; Further comprising: a roll-to-roll reverse offset printing unit for forming a roll-to-roll reverse offset printing image on the recording medium.
10. The method of claim 9,
The imprinting roller
And a heating means for heating the cliche.
The method according to claim 1,
The roll-type clizzard feeder
Wherein the clithe is formed through an imprinting process.
The method according to claim 1,
The roll-to-roll reverse offset printing apparatus
And a deformation preventing plate made of a paper material is attached to the rear surface of the substrate.
The method according to claim 1,
The roll-to-roll reverse offset printing apparatus
Wherein the roll-to-roll reverse offset printing apparatus is a means in which the hardening means formed on the roll-type substrate supply apparatus is hardened by thermal curing or photo-curing.
An aligning method of a roll to roll reverse offset printing apparatus according to any one of claims 1 to 13,
a) measuring a substrate strain to measure a change in length or width of the substrate;
b) adjusting the tension of the closure so as to correspond to the substrate strain measured at the substrate strain measuring step; Wherein the roll-to-roll reverse offset printing apparatus includes a roll-to-roll reverse offset printing apparatus.
15. The method of claim 14,
The chisel tension adjustment step
1) a speed adjusting step in which the cloak pulled out from the first unwinder is controlled in the unwinding speed by the first inflator;
2) a photographing step of photographing the cliché alignment mark of the cliche by the cliché photographing unit;
3) a measurement step of measuring the alignment accuracy by comparing the substrate alignment mark photographed by the substrate photographing unit with an image photographed by the first control unit from the cliché photographing unit;
4) a feedback step of adjusting the torque value of the first winder according to the alignment accuracy measured by the first control unit, or adjusting the friction force of the clutch formed in the first winder to adjust the tension of the cliche; Wherein the roll-to-roll reverse offset printing apparatus includes a roll-to-roll reverse offset printing apparatus.
15. The method of claim 14,
The aligning method of the roll to roll reverse offset printing apparatus
c) measuring the width of the cliche or the substrate;
d) The relative speed of the reverse offset printing roller passing through the first roller printing portion or the second roller printing portion which is an area in contact with the reverse offset printing roller is adjusted so that the error due to the width change of the cliche or the substrate is compensated A relative speed adjusting step; Wherein the roll-to-roll reverse offset printing apparatus includes a roll-to-roll reverse offset printing apparatus.
17. The method of claim 16,
In the relative speed adjustment step
The relative speed of the region in which the reverse offset printing roller and the cliche contact with each other is adjusted in the first roller printing portion,
Wherein a relative speed of an area where the reverse offset printing roller and the substrate are in contact with each other is adjusted in the second roller printing unit.
17. The method of claim 16,
The aligning method of the roll to roll reverse offset printing apparatus
e) a substrate tension adjusting step of adjusting the tension of the substrate to further compensate for the error in the longitudinal direction; Further comprising the steps of: (a) rotating the roll-to-roll reverse offset printing apparatus;

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