JPH09109361A - Multicolor image forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the color drift at the time of forming an image by snugly fixing a material to be formed with the image on a transfer member without using adhesive in a multicolor image forming apparatus for forming a plurality of colors of images at the respective colors on a sheet-like material to be formed with the images. SOLUTION: As a transfer belt 30, a sheet-like base material 74 in which an urethane foam adsorption layer 76 having fine pores 75 executed by foaming is formed on the surface is used. A sheet-like material to be formed with an image is mounted on the belt 30, superposed, pressed into close contact, and the material to be formed with the image is sucked fixedly to the belt surface by the suction cup action of the pores 75. Then, black and red 2-color or full- color multicolor image is formed on the material to be formed with the image without color drift while conveying it as the belt 30 is moved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as a printer, a copying machine, a facsimile machine, a printing machine, or a combination machine thereof. More specifically, in such an image forming apparatus, a sheet-shaped image forming body such as a sheet, a film or a card is superposed on a transfer member, and the image forming target is formed while the transfer member is moved and conveyed. The present invention relates to a multicolor image forming apparatus that forms an image of a plurality of colors for each color on a body.

[0002]

2. Description of the Related Art In a multi-color image forming apparatus of this type, it is necessary to firmly fix an image-forming member during conveyance on a transfer member so as not to cause color misregistration. For this reason, conventionally, for example, in a winding type multicolor screen printing machine, as shown in FIG. 8, the adhesives 2 and 2 are applied in a strip shape on both sides of the transfer belt 1, and the adhesives 2 and 2 are applied. Attach and transfer belt 1
An image forming body 3 in the form of a film is superposed on the image forming body 3, and while the transfer belt 1 is moved in the direction of the arrow a in FIG. 3 had an image formed on it.

[0003]

However, in such a conventional multicolor image forming apparatus, the transfer belt 1 is used.
When the image forming body 3 is peeled off from above, the image forming body 3
A small amount of the adhesive 2 is attached to the side, and the image forming body 3 after that is attached.
Was hindering the handling of.

Therefore, an object of the present invention is to firmly fix the image forming body 3 so as not to move on the transfer member 1 without using an adhesive in the multicolor image forming apparatus of the type described above. .

[0005]

Therefore, a multicolor image forming apparatus according to a first aspect of the present invention is, for example, a screen printing machine or a card printer of the following first to fourth embodiments shown in the drawings. On the transfer member, a transfer member such as a transfer belt 30 or a transfer mat 140 in which a urethane foam adsorption layer 76 having fine holes 75 is formed by subjecting the surface of the sheet-shaped base material 74 to foaming is used. An image forming body such as a sheet-shaped film material 33 or an IC card 104 is placed on and overlapped with each other, and is pressed down and brought into close contact with the fine holes 7
The image forming body is adsorbed by the suction cup action of 5, and the multi-color image of two colors or full color is formed on the image forming body while the image forming body is conveyed with the movement of the transfer member. Characterize.

According to a second aspect of the present invention, in the multicolor image forming apparatus according to the first aspect, the image forming body is superposed on the transfer member as shown in the following illustrated embodiment, for example. Is provided with pressing rollers 28, 88, 124, and 147 which are pressed against and closely contact with each other, and the pressing member sucks the image forming body to the transfer member by a sucking action.

According to a third aspect of the present invention, in the multicolor image forming apparatus according to the second aspect, the pressing roller 28.
88, 124, and 147 are characterized by being formed by a roller having an adhesive surface.

In the invention according to claim 4, the surface of the sheet-shaped substrate has a self-adhesive property by blending a polyvinyl chloride resin or a copolymer containing a vinyl monomer as a main component with a plasticizer. Using a transfer member having an adhesive layer formed thereon, a sheet-shaped image forming body is placed on the transfer member, superposed, pressed and adhered, and the image formed on the adhesive surface of the adhesive layer. A body is attached, and a multicolor image is formed on the image forming body while the image forming body is conveyed along with the movement of the transfer member.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The first to fourth embodiments of the invention described in claim 1 will be described below with reference to the drawings. FIG. 1 is a schematic front view of a two-color screen printing apparatus showing a first embodiment, and FIG. 2 is a plan view thereof.

The screen printing apparatus shown in the drawing is from the left to the right in the figure, and is provided with a unwinding machine 10, a first printing machine 11 and a first drying machine 1.
2. The second printing machine 13, the second drying machine 14, and the winding machine 15 are arranged side by side. The drive roller 20 and the driven rollers 21, 22, 23, 24, 25 are provided in the main body of the apparatus.
26 and 27 are provided, and the endless transfer belt 30 is stretched over the rollers 20 to 27 while maintaining appropriate tension. A pressing roller 28 is pressed against the driven roller 26 by sandwiching the belt 30.

When the two-color screen printing apparatus is used to print two colors of black and red on a film material, as shown in the drawing, the film roll 3 is fed to the unwinding machine 10.
2, the film material 33 is pulled out from the film roll 32, and the rollers 40, 41,
42, 43, 44, 45, 46, 47, 48, 49.5
After passing over 0, it is put in the first printing machine 11. First
In the printing machine 11, the rollers 26 and 28 are put on the transfer belt 30 so as to be overlapped with each other.
2 and the inside of the second printing machine 13 to be put into the second drying machine 14. In the second dryer 14, the roller 52.5 is separated from the transfer belt 30 at the position of the driving roller 20.
The rollers 56 and 57 are wound on the rollers 56 and 57, and then wound up and down in the winder 15 to reciprocate up and down in the main drying section 16.
-It is wound around 58, 59, 60, 61, and 62, and finally wound around the winding roll 35 attached to the winding machine 15.

Then, the switches are operated to transmit the rotation from the drive source (not shown) to rotate the drive roller 20 and to wind up the winding roll 35 of the winding machine 15. Then, in the first printing machine 11, as shown in FIG. 3, the squeegee 7 is moved while the transfer belt 30 is moved in the direction of the arrow A in FIG.
0, a black ink 71 is applied to the film material 33 with a width b.
Then, the coating is applied at intervals of the width b. Then, the first dryer 1
Within 1, the product is dried by blowing hot air. After that, in the second printing machine 13, the red ink with the width b is applied between the black inks 71 this time. Then, hot air is blown again in the second dryer 14 for drying, and finish drying is performed in the main drying section 16. As a result, the black red 2 on the film material 33
Color images are formed alternately with width b.

Now, in such a multicolor image forming apparatus,
The film material 33, which is the image forming body, should not move on the transfer belt 30 to cause color misregistration of the ink. Therefore, in the invention described in claim 1, as the transfer belt 30, for example, as shown in FIG. 4, a urethane foam adsorption layer 76 having fine pores 75 is provided by subjecting the surface of the sheet-like base material 74 to foaming. This is because, for example, a rough surface is formed on the surface of a sheet-like base material 74 made of resin, paper, cloth or the like by anchor coating or colon discharge treatment to improve adhesion, and a urethane resin is thinly applied on the rough surface. After that, a foaming process is performed by adding heat, air or the like to form a urethane foam adsorption layer 76 having continuous fine pores 75, and finally drying is completed.

Then, the film material 33, which is a sheet-shaped image forming body, is placed on the transfer belt 30 in the first printing machine 11 so as to be superposed and passed between the rollers 26 and 28. And hold it tightly,
The film material 33 is adsorbed by the suction action of the fine holes 75. This makes it possible to form images of two colors, black and red, on the film material 33, which is a sheet-shaped image forming body, without color misregistration while the transfer belt 30, which is a transfer member, is moved and conveyed.

Next, FIG. 5 is a schematic configuration diagram of a color card printer showing a second embodiment of the invention described in claim 1. In the illustrated printer, a drive roller 81 and driven rollers 82, 83, 84, 85, 86 are provided in the apparatus main body 80.
-Hang it on 87 and stretch the endless transfer belt 30 while maintaining appropriate tension. As in the above-described embodiment, the transfer belt 30 has a urethane foam adsorption layer 76 having fine holes 75 formed by subjecting the surface of the sheet-like base material 74 to foaming, as shown in FIG.
What is formed is used.

The transfer belt 30 is sandwiched between the driven roller 82 and the pressing roller 88. Further, at the position of the driven roller 83, the recording head 95 via the yellow ribbon 90, at the position of the driven roller 84 the recording head 96 via the magenta ribbon 91, and at the position of the driven roller 85 the recording head 97 via the cyan ribbon 92, At the position of the driven roller 86, the black ribbon 93
The recording head 98 through the U roller at the position of the driven roller 87.
Recording heads 99 are provided via V-coat ribbons 94 so as to face the belt surfaces. Each of the ribbons 90 to 94 is unwound from the unwinding roll 100 and wound into the take-up roll 1.
It is wrapped around 01.

Now, using this printer, the IC card 1
When full-color recording is performed on 04, the IC card 104 is loaded on the mounting table 105 in the apparatus main body 80.
Then, as the feeding roller 106 rotates counterclockwise in the figure, the IC card 104 is sequentially fed out from below and guided between the rollers 82 and 88, and the IC card 104 is placed on the belt surface of the transfer belt 30. The IC cards 104 are superposed and pressed against each other by a pressing roller 88 so as to be in close contact with each other, and the IC card 104 is adsorbed by the sucking action of the fine holes 75.

While the transfer belt 30 is being moved, the IC card 104 is being conveyed, the yellow ribbon 90 is used at the position of the driven roller 83 to record yellow with the recording head 95, and the magenta ribbon 91 is used at the position of the driven roller 84. The recording head 96 to record magenta, the driven roller 85 to the recording head 97 to record cyan with the ribbon 92, and the driven roller 86 to the recording roller 98 to record black with the recording head 98. At the position of the driven roller 87, UV coating is performed by the recording head 99 using the UV coating ribbon 94.

As a result, the fine holes 75 are surely attracted by the sucker action, and while the transfer belt 30 which is a transfer member is moved and conveyed, the IC card 104, which is a sheet-shaped image forming body, is full-colored without color deviation. An image is formed and discharged onto discharge tray 110 externally attached to the apparatus main body 80 by discharge rollers 108 and 109.

FIG. 6 is a schematic configuration diagram of a color card printer showing a third embodiment of the invention described in claim 1. In the illustrated printer, the drive roller 121 and the driven rollers 122 and 123 are stretched in the apparatus main body 120, and the endless transfer belt 30 is stretched while maintaining a proper tension. As the transfer belt 30, as in both of the above-described embodiments, the one in which the urethane foam adsorption layer 76 having the fine pores 75 is formed by subjecting the surface of the sheet-like base material 74 to foaming as in the case shown in FIG. use.

The transfer belt 30 is sandwiched between the driven roller 122 and the pressing roller 124. Further, at the position of the driven roller 123, the recording head 126 is provided so as to face the belt surface via the color surface sequential ink ribbon 125. The ink ribbon 125 is provided with ink surfaces of yellow, magenta, cyan, etc., which are repeatedly arranged side by side in the length direction, and is fed from a feeding roll 127 and wound around a winding roll 128.

Now, using this printer, the IC card 1
When full-color recording is performed on the recording medium 04, the IC card 104 is loaded on the mounting table 129 inside the apparatus main body 120. Then, as the feeding roller 130 rotates counterclockwise in the drawing, the IC card 104 is sequentially fed from below and guided between the rollers 122 and 124. Then, as the drive roller 121 is driven in the counterclockwise direction in the figure, the transfer belt 30 is moved and the pressing roller 124 is driven to rotate, and the IC is formed on the belt surface of the transfer belt 30.
The cards 104 are placed on top of each other, and pressed by the pressing roller 124 to be in close contact with each other, and the IC card 104 is adsorbed by the suction action of the fine holes 75.

Then, as the transfer belt 30 is driven, the IC card 104 is conveyed in the c direction and the take-up roll 128 is rotated to feed the IC card 104.
The ink ribbon 125 is unwound from the recording head 126, and the recording head 126 records yellow using the yellow surface of the color surface sequential ink ribbon 125. Then, the feeding of the ink ribbon 125 is stopped, the transfer belt 30 is reversely driven, and the IC card 104 is returned in the d direction.

Next, the transfer belt 30 is driven again counterclockwise in the figure to convey the IC card 104 in the direction c, while feeding the ink ribbon 125,
This time, the recording head 126 records magenta using the magenta surface of the color frame sequential ink ribbon 125. After that, the feeding of the ink ribbon 125 is stopped, and the transfer belt 30 is driven again in the reverse direction to return the IC card 104 in the d direction. Then, the transfer belt 30 is driven again counterclockwise in the drawing to convey the IC card 104 in the c direction, and while feeding the ink ribbon 125 again, next, using the cyan surface of the color surface sequential ink ribbon 125. The recording head 126 records cyan. Finally, UV coating is performed in the same manner.

As a result, the fine holes 75 are surely attracted by the suction effect, and the transfer belt 30, which is a transfer member, reciprocates and conveys the same, and there is no color shift on the IC card 104, which is a sheet-shaped image forming body. A full-color image is formed and discharged by the discharge rollers 131 and 132 onto a discharge tray 133 externally attached to the apparatus main body 120.

Finally, FIG. 7 is a schematic view of the main parts of a line type color card printer showing a fourth embodiment of the invention described in claim 1. Reference numeral 140 in the drawing is
It is a flat transfer mat. As the transfer mat 140, similar to the first to third embodiments described above, the urethane foam adsorption having the fine holes 75 by foaming the surface of the sheet-like base material 74 is performed as shown in FIG. The thing which formed the layer 76 is used. Then, it is attached to the slider 141. Slider 141
Has a gear 143 meshed with the downward rack 142. The gear 143 is rotated by the carry motor 144,
The slider 141 supported by the rollers 145 and 146 is movable left and right in the drawing.

On the other hand, in the card printer, the pressing roller 14 is brought into contact with the mat surface of the transfer mat 140.
7, and a recording head 126 facing the matte surface via the color surface sequential ink ribbon 125, as in the third embodiment. The ink ribbon 125 is
A take-up roll 128 which is taken out from the pay-out roll 127
Hang over. The winding roll 128 is rotated by the ribbon feed motor 148.

Now, using this printer, the IC card 1
When performing full-color recording on 04, the IC card 104 is placed on the mat surface of the transfer mat 140 and overlapped. Then, the conveyance motor 144 is driven to rotate the gear 143 in the clockwise direction in the drawing, and the rollers 145 and 146 are rotated.
And slide the slider 141 to move the pressing roller 147.
Is driven to rotate. Then transfer mat 14
0, the IC card 104 is conveyed in the direction c, and is pressed by the pressing roller 147 to bring the IC card 104 into close contact with the mat surface, and the IC card 104 is sucked by the fine holes 75.
To adsorb. After that, the conveyance motor 144 is reversely driven to rotate the gear 144 counterclockwise in the figure, and the slider 141 is returned to return the IC card 104 together with the transfer mat 140 in the d direction.

Then, the transfer motor 144 is driven again to move the slider 141, and the transfer mat 14 is moved.
0, the IC card 104 is conveyed in the c direction, and the ribbon feed motor 148 is driven to take up the winding roll 1.
28 is rotated, and the ink ribbon 1 is fed from the feeding roll 127.
25 is fed and the color frame sequential ink ribbon 125 is sent. Then, first, the recording head 126 records yellow using the yellow side of the ink ribbon 125.
Next, the feeding of the ink ribbon 125 is stopped, the conveyance motor 144 is driven in reverse, the slider 141 is returned, and the IC card 104 together with the transfer mat 140 is returned in the d direction.

After that, the carry motor 144 is driven again to carry the IC card 104 in the direction c, and the ribbon feed motor 148 is driven to feed the ink ribbon 125. Then, using the magenta surface of the ink ribbon 125, the recording head 126 records magenta. Then, the feeding of the ink ribbon 125 is stopped, the transport motor 144 is again driven in the reverse direction, the slider 141 is returned, and the IC card 104 together with the transfer mat 140 is returned in the d direction. Then, the transport motor 144 is driven again to drive the IC.
The card 104 is conveyed in the direction c, and the ribbon feed motor 148 is driven to feed the ink ribbon 125. Finally, cyan recording is performed by the recording head 126 using the cyan surface of the ink ribbon 125. Finally, UV coating is performed in the same manner.

As a result, the fine holes 75 are surely attracted by the suction effect, and the transfer mat 140, which is a transfer member, reciprocates and is conveyed, and the color is not misaligned on the IC card 104, which is a sheet-shaped image forming body. A full color image can be formed.

In the above-described second to fourth embodiments, only the case where full-color recording is performed on the IC card 104 has been described. However, in the illustrated card printer, by using an arbitrary ink ribbon in the second embodiment, and by using an arbitrary ink surface of the ink ribbon 125 in the third or fourth embodiment, it is possible to obtain 1 respectively. It is also possible to perform color or two-color recording, and it is also possible to form a monochrome image. Of course, even in such a case, the sheet-shaped image forming body (I
The C card 104) can be surely adhered to the transfer member without displacement by utilizing the suction effect of the fine holes 75.

By the way, in the invention described in claim 2, as shown in the above-mentioned first to fourth embodiments, the film material 33 and the IC card are provided on the transfer member such as the transfer belt 30 and the transfer mat 140. Pressing rollers 28, 88, 124, 14 that superimpose image forming bodies such as 104 and hold down the image forming bodies when they pass therethrough and closely contact the transfer member.
7 is provided. As a result, the pressure rollers 28, 88, 124, and 147 press the sheets, and the image forming body is surely adsorbed on the transfer member by the suction action.

According to a third aspect of the invention, in the multicolor image forming apparatus according to the second aspect, the pressing rollers 28, 88, 124 and 147 are formed of rollers having an adhesive surface. The feature is that Thus, when the pressure rollers 28, 88, 124, and 147 are pressed, dust on the image forming body can be removed due to the adhesiveness of the surface, and the recording quality on the image forming body can be improved. Also, when there is no image forming body,
By directly contacting the transfer member and removing dust and the like thereon, it is possible to prevent deterioration of the sucker action of the transfer member.

In the above-described embodiment, the transfer member is formed by foaming the surface of the sheet-like base material 74 to form the urethane foam adsorption layer 76 having the fine pores 75. Then, a sheet-shaped image forming body is superposed on and closely adhered to the transfer member, and the image forming body is adsorbed by a suction function of the fine holes 75. However, in the invention according to claim 4, a self-adhesive sticking is made by blending a polyvinyl chloride resin or a copolymer containing a vinyl monomer as a main component with a plasticizer on the surface of the sheet-like substrate. The layers are formed to form the transfer member.
Then, a sheet-shaped image forming body is superposed on the transfer member so as to be in close contact with the transfer member, and the image forming body is stuck to the sticking surface of the sticking layer. Then, similarly, a multicolor image is formed on the image forming body while conveying the image forming body as the transfer member moves.

In this case, as the adhesive layer formed on the surface of the sheet-shaped substrate, those disclosed in JP-B-51-28102 may be used. That is, ethylene: vinyl acetate 30-6
Ethylene vinyl acetate copolymer with a ratio of 0%: 70-40%
50 to 75%, vinyl chloride monomer 50 to 25% Graft-polymerized 100 parts by weight of synthetic resin, 5 to 75 parts by weight of a plasticizer, and optionally 5 to 150 parts by weight of a tackifier. However, the adhesion is excellent and preferable.

[0037]

Therefore, according to the first aspect of the present invention, the image forming member is adsorbed onto the transfer member by the suction effect of the fine holes, and is firmly fixed so as not to move and the transfer member moves. Since a multicolor image is formed on the image forming body while being conveyed, there is no risk of color misregistration. Then, since it is adsorbed by the suction cup action, the image forming body can be repeatedly adsorbed and peeled off on the transfer member. Further, since it is also adsorbed by the suction cup action, the adhesive does not adhere to the image forming body peeled off from the transfer member, and the subsequent handling of the image forming body can be facilitated.

According to the second aspect of the present invention, since the pressing roller that presses the image forming body and closely adheres to the transfer member is provided, the image forming body can be firmly adsorbed on the transfer member by the sucker action. You can

According to the third aspect of the invention, in the multicolor image forming apparatus according to the second aspect, since the pressing roller is formed by a roller having an adhesive surface, when pressing by the pressing roller. The dust on the image forming body can be removed by the adhesiveness of the surface, and the recording quality on the image forming body can be improved. Further, when there is no image forming body on the transfer member, it is possible to directly contact the transfer member and remove dust and the like on the transfer member as well, thereby preventing the suction function of the transfer member from lowering.

According to the fourth aspect of the present invention, the image forming body is adhered onto the transfer member and firmly fixed so as not to move, and the image forming body is conveyed while the transfer member is moved. Since a multicolor image is formed on the upper surface of the transfer member, there is no risk of color misregistration as in the case of the first aspect of the invention, and the image forming body can be repeatedly adhered and peeled onto the transfer member. The pressure-sensitive adhesive does not adhere to the image-forming body that has been peeled off, and the subsequent handling of the image-forming body can be facilitated.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a two-color screen printing device as seen from the front side, showing a first embodiment of the invention according to claim 1.

FIG. 2 is a schematic plan view thereof.

FIG. 3 is a perspective view showing a printing state by a printing machine used in the printing apparatus.

FIG. 4 is a partially enlarged vertical sectional view showing the structure of a transfer belt used in the printing apparatus.

FIG. 5 shows a second embodiment of the invention according to claim 1, and is a schematic configuration diagram of the color card printer as seen from the front side.

FIG. 6 shows a third embodiment of the invention according to claim 1, and is a schematic configuration diagram of another color card printer as seen from the front side.

FIG. 7 shows a fourth embodiment of the invention according to claim 1, and is a schematic configuration view of still another color card printer as seen from the front side.

FIG. 8 is a perspective view showing a printing state by a printing machine used in a conventional two-color screen printing apparatus.

[Explanation of symbols]

 28 Pressing Roller 30 Transfer Belt (Transfer Member) 33 Film Material (Image Forming Body) 74 Sheet Base Material 75 Micropores 76 Urethane Foam Adsorption Layer 88 Pressing Roller 104 IC Card (Image Forming Body) 124 Pressing Roller 140 Transfer Mat (Transfer member) 147 Pressing roller

Claims (4)

[Claims] 1. A transfer member obtained by forming a urethane foam adsorption layer having fine pores on a surface of a sheet-shaped substrate by foaming, and a sheet-shaped image-forming body is placed on the transfer member. And the image forming body is adsorbed by the sucking action of the fine holes, and the multi-color image is formed on the image forming body while conveying the image forming body as the transfer member moves. A multicolor image forming apparatus, which forms an image. 2. A pressing roller is provided on the transfer member, the pressing roller being pressed against and closely contacting when the image forming body is overlapped and passing therethrough, and the pressing roller adsorbs the image forming body to the transfer member by a sucking action. The multicolor image forming apparatus according to claim 1, wherein 3. The multicolor image forming apparatus according to claim 2, wherein the pressing roller is formed of a roller having an adhesive surface. 4. A self-adhesive adhesive layer is formed on the surface of a sheet-like substrate by blending a polyvinyl chloride resin or a copolymer containing a vinyl monomer as a main component with a plasticizer. A transfer member is used, and a sheet-shaped image forming body is placed on the transfer member, superposed on each other, and pressed and adhered, and the image forming body is attached to the attaching surface of the adhesive layer, A multicolor image forming apparatus, wherein a multicolor image is formed on the image forming body while the image forming body is being conveyed along with the movement of the transfer member.