JPH02258285A - Color developer applicator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a developer coating device for applying a granular developer to a support such as plain paper that supports the developer in image recording. .

[Conventional technology]

Recently, color copying machines have been used to expose microcapsule paper through an original, and then feed the exposed microcapsule paper and developer paper, which has a support such as plain paper coated with a color developer, into a pressure developing device. A new type of technology has appeared in which the color image on microcapsule paper after exposure is transferred onto developer paper, and the developer paper after pressure development is sent to a heat fixing device to obtain a color image on the developer paper. . .

The color developer paper is made by coating a color developer such as acid clay and a binder on a support such as plain paper. As a colorant coating device, there is a type of device that coats a granular color developer onto a support such as plain paper using a charging effect.

That is, as shown in FIG. 5, the known color developer application device includes a color developer tank 50 for storing granular color developer S.
In the developer tank 50, there are provided a rotating developer carrying roller 52 and a replenishment roller 51 which is provided in pressure contact with the developer carrying roller 52. The color developer carrying roller 52 and the replenishment roller 51 rotate with each other and are frictionally charged on their contact surfaces to positively charge the color developer S, and this positively charged color developer S becomes a color developer. It adheres to the circumferential surface of the carrier roller 52 and is attracted toward the opposing roller 53 provided opposite to the developer carrier roller 52 .

A negative voltage is applied to the opposing roller 53, and the conveyor belt 5, which is an opposing electrode, is connected between the opposing roller 53 and a guide roller 55, 55 spaced apart from the rear side of the opposing roller 53.
4 is running. A support P supporting the color developer S, such as plain paper, is adsorbed and conveyed on the conveyor belt 54, and a positively charged granular developer is placed at a position closest to the developer carrying roller 52 and the opposing roller 53. The colorant S was transferred and adhered onto the support P to form a color developer layer m.

[Problem to be solved by the invention]

However, according to the above-mentioned conventional color developer coating device, when the color developer S is electrostatically moved and adsorbed toward the support P, the color developer S is firmly attached to the support P. However, when the support P is transported out of the area where the electrostatic force is acting, the adhesion force suddenly weakens, and the color developer is removed from the support during transport. There have been problems in that the color developer falls off or adheres to the microcapsule sheet side when pressed against the microcapsule sheet, resulting in missing pixels in the image formed on the support.

The present invention was made in order to solve the above-mentioned problems, and it is possible to firmly adhere a color developer to a support and prevent pixels from falling out due to the developer falling off or adhering to microcapsules. The purpose is to

[Means to solve the problem]

In order to achieve this object, the color developer coating device according to the present invention is a color developer coating device for image recording in which granular color developer is transferred and attached to the support. After coating on the support, a pressurizing means for pressurizing the developer was provided on the support.

[Function] According to the present invention configured as described above, since a pressure means is provided for applying pressure to press the color developer against the support after coating the color developer, the granular color developer is The agent is moved and attached to the support surface by electrostatic force in the transfer region. Thereafter, by applying pressure with a pressure means, the adhesion of the color developer to the support is strengthened. This prevents the developer from falling off when the support coated with the developer is transported, and also prevents missing pixels due to the developer adhering to the microcapsule sheet during pressure development. It never occurs.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a color image recording apparatus M equipped with an embodiment of the color developer coating apparatus according to the present invention. A microcapsule paper (light-sensitive and pressure-sensitive paper) 7 running between a take-up roll 6 and an original 10 is exposed to light. Approximately at the center of the casing C of the color image recording device M,
A developer coating device 2 is provided, and a pressure developing device 3 is provided near the developer coating device 2.

In this pressure development device 3, the microcapsule paper 7 exposed by the exposure device 1 and the developer paper whose support P is coated with a developer S by the developer coating device 2 are superimposed and subjected to pressure development. Then, the color image on the microcapsule paper 7 is transferred to the color developing paper. The color developing paper subjected to pressure development by the pressure developing device 3 is sent to a heat fixing device 4, and the color developing paper is fixed by this heat fixing device [4].

The exposure device 1 has a halogen lamp 8. Below the halogen lamp 8, a rotating color separation filter 9 for three primary colors is provided. It is placed on. Guide rollers 12.12 are provided on the left and right sides of this document table 11,
The microcapsule paper 7 exposed at the lower part of the exposure device 1 is further fed into the pressure developing device 3 via guide rollers 12, 12 provided downstream thereof.

The developer paper coated with the developer S on the support P by the developer coating device 2 is superimposed on the microcapsule paper 7 by the guide roller 13, and then transferred to the pressure rollers 14, 14 of the pressure development device 3. A pressure developing action is performed by the pressure of this pressure roller 14.

The microcapsule paper 7 that has passed through the pressure development device 3 is wound up by a take-up roller 6, and the color developer paper that has passed through the pressure development device 3 passes through the heat fixing device 4 via a guide roller 15, and is further It passes through the guide roller 16 and is discharged to the outside.

As shown in detail in FIG. 2, the color developer application device 2 includes a color developer carrying roller 21 and a conductive roller 22 disposed at a predetermined distance from the developer carrying roller 21. , a support P such as plain paper is conveyed through the gap between the rollers 21 and 22 while being in contact with a conveyor belt 24 wound around the conductive roller 22 and the belt roller 23.

The color developer carrying roller 21 is disposed on the side of a color developer case 25 that stores the granular color developer S, and is attached at a position where it contacts the transport path of the support P with a certain space. There is. Transfer electrolysis is applied between the developer carrying roller 21 and the conductive roller 22 by a power source E1. Further, a rotatable developer supply roller 31 is disposed on the outer periphery of the developer carrying roller 21 in the upstream direction with respect to the rotational direction of the developer carrying roller 21 from the position of the developer transfer area 27. It is provided so as to be in pressure contact with the colorant carrying roller 21. The developer supply roller 31 is covered with the developer case 25 as described above. Immediately downstream of the developer transfer area 27 in the direction of movement of the conveyor belt 24, an upper pressure roller 33 and a lower pressure roller 34 as pressure means are provided so as to sandwich the conveyor belt 24 therebetween.

Further, a support P is provided on the side of the exterior 35 of the color developer coating device 2.
An insertion port 39 for inserting the support P and an extraction port 3 for taking out the support P
8 is provided. Furthermore, inside the color developer application device 2, a conductive roller 22, a belt roller 23, and a conveyor belt 24 are provided.
is stretched so that the support P inserted through the insertion opening 39 is conveyed through the developer transfer area 27 toward the extraction opening 38 .

The color developer coating device 2 having such a configuration operates as follows. Color developer carrying roller 21 and color developer supply roller 3
1 rotates, the developer S comes into contact and is charged by friction, and the developer S is uniformly charged on the developer carrying roller 21.
is attached.

On the other hand, the support P inserted through the insertion opening 39 is conveyed to the developer transfer area 27 by the conveyor belt 24. Then, by applying an electric field suitable for the polarity of the charged developer S, the charged developer S moves from the developer transport roller 2 to the support P and adheres thereto. Then, the upper pressure roller 33 and the lower pressure roller 34
Pressure is applied so as to press the color developer S onto the surface of the support P. After that, the support P is discharged from the outlet 38.

In this way, the developer S is firmly attached to the surface of the support P by the upper pressure roller 33 and the lower pressure roller 34.

FIG. 3 shows a second embodiment of the present invention.

The difference from FIG. 2 is that the lower pressure roller 34 is omitted and a conductive roller 22 is used instead of the lower pressure roller 34. In this embodiment, after the charged color developer S moves from the developer carrying roller 21 onto the support P and adheres thereto, it is pressed between the upper pressure roller 33 and the conductive roller 22, The color developer S is firmly attached to the support P. According to such a configuration, since the lower pressure roller 34 is not used, the number of parts can be reduced.

Furthermore, FIG. 4 shows a third embodiment of the color developer coating device 2 of the present invention. In this embodiment, the upper pressure roller 33
Instead of using the upper and lower pressure rollers 34, an upper flat plate 40 and a lower flat plate 41 are used.

The charged color developer S is transferred from the color developer carrying roller 21 to the support P.
After moving upward, when the support P moves to between the upper flat plate 40 and the lower flat plate 41, the conveyor belt 24 is temporarily stopped, the upper flat plate 4o and the lower flat plate 41 are brought into close contact, and the color developer is S is fixed onto the support P. After that, the upper flat plate 4
0 and the lower flat plate 41 are separated, the conveyor belt 24 is moved, and the support P is conveyed to the outlet 38.

According to such a configuration, a uniform color developer can be immobilized on the support P over a wide range.

〔Effect of the invention〕

As explained above, according to the present invention, after the color developer moves and adheres to the support in the transfer region, the color developer is fixed to the support by the pressure means. This prevents the developer from falling off when transporting the support coated with the developer, and also prevents the developer from falling off on the microcapsule sheet side during pressure development with the microcapsule sheet. This has the effect that pixel dropout due to adhesion will not occur.

FIG. 5 is a block diagram showing an example of a conventional color developer coating device.

1... Exposure device, 2... Color developer coating device, 3...
Pressure developing device, 4... Heat fixing device, 21... Color developer carrying roller, 22... Conductive roller, 24... Conveyance belt, 33... Upper pressure roller, 34... Lower pressure No.J roller, 40...upper flat plate, 41...lower flat plate.

Applicant's representative Yasuo Ishikawa

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a color image recording apparatus to which the developer coating device of the present invention is applied, FIG. 2 is a configuration diagram showing a first embodiment of the developer coating device of the present invention, and FIG. A configuration diagram showing the second embodiment, FIG. 4 is a diagram showing the third embodiment.

Claims (1)

[Claims] In a color developer coating device for image recording in which a granular color developer is transferred and attached to the support, the color developer is applied to the support, and then the color developer is added to the support. A color developer coating device characterized by being provided with a pressure means for applying pressure.