JPH03171047A - Device for applying color developer - Google Patents

Abstract

PURPOSE:To allow the formation of color developing paper in a short period of time by providing a color developer supplying roller which can be deposited with the color developers in the amt. larger than on a color developer supplying roller on the surface. CONSTITUTION:The core material of the color developer supplying roller 17 is rotationally driven by a motor to rotate the pile part covering the circumferential surface of the color developer supplying roller 17 integrally with the core material, by which the pile part is brought into contact with the granular color developers S. The pile part is formed of an easily electrifiable high-polymer material and is previously formed to a brush shape to increase the contact area with the color developers S. In addition, the pile part is sufficiently electrified while the color developers S are sent to the color developer carrying roller 18 so that the electric charge necessary for the electrostatic application on a base P is imparted to the color developers. The large amt. of the color developers are stably applied on the base in a short period of time in this way, by which the color developing paper is formed.

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]

Conventionally, in color copying machines, microcapsule paper containing dye precursors, photopolymerization initiators, etc. and carrying microcapsules on the surface whose mechanical strength changes when sensitive to light is exposed through the original. The resulting microcapsule paper and an image recording medium (developer paper), which has granular color developer adhered to the surface of a support such as plain paper, are sent into a pressure developing device and brought into close contact with each other, so that the paper is not photocured during the exposure. The microcapsules with low mechanical strength are destroyed by pressure and the dye precursor inside them flows out, and the released dye precursor is reacted with the color developer, thereby developing a color image on the developer paper. A method is known in which a color image is transferred onto the developer paper, and the developer paper after pressure development is sent to a heat fixing device to fix a color image on the developer paper.

This color developer paper is not versatile and is difficult to obtain because the type that has been coated with a color developer in advance is
2. Description of the Related Art A color developer coating device has been proposed that applies granular color developer to the surface of a support such as plain paper.

FIG. 3 shows an example of a conventional color developer coating device, and its configuration will be explained.

This color developer application device 200 includes a color developer supply device 201 that stores a granular color developer S and feeds the color developer S to a deposition area A, and a support for plain paper or the like to which the color developer S is applied. A support conveying device 202 that conveys the body P, and a support insertion port 2
03 and a support outlet 204.

The color developer supply device 201 includes a color developer storage tank 210 that stores the color developer S, a color developer carrying roller 212 that is rotatably provided and feeds the color developer S while supporting it to the attachment area A, and The color developer supplying roller 211 is rotatably provided in contact with the developer carrying roller 212 and assists the developer carrying operation of the developer carrying roller 212.

The support conveyance device 202 also includes an electrode roller 220 made of a conductor that is rotatably provided opposite to the color developer carrying roller 212 across a gap d in the attachment area A, and an electrode roller 220 that is separated from the electrode roller 220. Guide roller 2 provided
21 and 222, a conveyor belt 223 that is stretched between the electrode rollers 220 and guide rollers 221 and 222 to convey the support P, and an AC power source 224 that is connected to the electrode rollers 220.

Next, the operation of the conventional example will be explained.

Color developer carrying roller 212 and color developer supply roller 211
rotate while in contact with each other, triboelectrically charging the particles of the color developer S. The particles of the charged color developer S adhere to the circumferential surface of the color developer carrying roller 212, and
It is fed into the adhesion area A along with the rotation of 2.

On the other hand, the support P includes the electrode roller 220 and the guide roller 2.
21 and 222, and is transported to the attachment area A.

In the adhesion region A, an AC electric field exists between the electrode roller 220 and the color developer carrying roller 212 due to the AC power supply 224 . Therefore, the particles of the charged color developer S fly under the electrostatic attraction force in the direction of the electrode roller 220, adhere to the support P conveyed by the conveyor belt 223, and the color developer A layer m is formed.

The color developer supply roller 211 in this conventional color developer coating device 200 is made of sponge, rubber, or the like.

[Problem to be solved by the invention]

However, in the above-mentioned conventional color developer application device, since the surface of the color developer supply roller, which is a component thereof, is almost smooth, it is necessary to assist the operation of carrying the color developer on the surface of the color developer carrying roller. capacity is small.

Therefore, in order to apply a sufficient amount of color developer to the support, the conveyance speed of the support must be significantly slower than the linear speed of the developer carrying roller surface in the deposition area. As a result, it takes a long time to finish applying the color developer to the support, which in turn causes a reduction in the copying efficiency of the entire copying machine.

The present invention has been made to solve the above-mentioned problems, and it is possible to carry a larger amount of developer on the surface of the developer carrying roller than the developer supply roller in a conventional developer coating device. It is an object of the present invention to provide a developer coating device that is equipped with a developer supply roller and can produce developer paper in a shorter time than conventional developer coating devices.

[Means to solve the problem]

In order to solve the above problems, the present invention provides a support transport means for transporting a support through an attachment area, a developer storage means for storing a color developer, and a developer storage means for transporting a charged color developer to the attachment area. A color developer carrying means for carrying and conveying the color developer, and a brush-like insulating material surface and installed in the vicinity of the color developer storage means to triboelectrically charge the color developer and supplying the color developer to the color developer carrying means. a color developer supplying means that faces the color developer supporting means in the adhesion region with a predetermined gap therebetween, and electrostatically applies the charged color developer to the support being conveyed by the support conveyance device. and an electrostatic adhesion device for adhesion.

[Effect]

According to the present invention having the above structure, when the core material of the developer supply roller is rotationally driven by a motor (not shown), the pile portion covering the circumferential surface of the developer supply roller is also integrated with the core material. Rotates and comes into contact with granular color developer. At this time,
Since the pile part is made of a polymeric material that is easily charged and has a brush shape, the area in contact with the developer is large, and the developer is sufficiently charged while being sent to the developer carrying roller. A charge of several μc/g required for electrostatic coating on a support is imparted. Therefore, the color developer carrying roller can carry a larger amount of color developer than in the conventional case.

〔Example〕

Next, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows a color image recording apparatus 1 equipped with an embodiment of a color developer coating apparatus according to the present invention. This color image recording device 1 has a casing 9, and inside the casing 9, an exposure device 2, a photosensitive pressure sensitive paper conveying device 3, a pressure developing device 4, a color developer coating device 5, and a heat fixing device 6 are installed. , a cutter 7 , and an outlet 8 .

The exposure device 2 has an optical system 10 and a document table 11, and the photosensitive and pressure sensitive paper conveying device 3 has a photosensitive and pressure sensitive paper roll 12 and a take-up roll 1.
A microcapsule paper (light-sensitive and pressure-sensitive paper) 15 having a guide roll 14 and a guide roll 14 and running therebetween is exposed to light by the original W, and the exposed microcapsule paper 15 passes through the guide roll 14 and heads to the pressure developing device 4.

On the other hand, the developer coating device 5 includes a developer storage tank 16, a developer supply roller 17, a developer carrying port 18, an electrode roller 19, a support roll 20, and an AC power source 21. A support P such as plain paper unwound from the support roll 20 is coated with a color developer S by an alternating electric field between an electrode roller 19 and a color developer carrying roller 18, and then subjected to pressure development. Head to device 4.

The pressure developing device 4 has pressure rolls 22 and 23, and stacks the microcapsule paper 15 exposed by the exposure device 2 and the developer paper P whose surface is coated with a developer S by the developer coating device 5. By bringing them into close contact, the color image developed on the microcapsule paper 15 is transferred to the color developing paper. After this pressure development, the color developing paper P is sent to a heat fixing device 6, where the color image is fixed, and then cut into appropriate dimensions by a cutter 7 and discharged to the outside from an outlet 8.

Next, FIG. 2 shows an embodiment of a color developer coating apparatus according to the present invention.

This color developer application device 100 includes a color developer supply device 101 that stores a granular color developer S and feeds the color developer S to a deposition area A, and a support for plain paper or the like to which the color developer S is applied. A support conveying device 102 that conveys the body P, and a support insertion port 1
03 and a support outlet 104.

The color developer supply device 101 has a cylindrical shape including a developer storage tank 110 that stores the color developer S, and is rotatably provided around a rotating shaft and feeds the color developer S to the attachment area A while supporting it. A developer carrying roller 114 and a developer which is in contact with or very close to the developer carrying roller 114 and which is rotatably provided around a rotating shaft and which assists the developer carrying operation of the developer carrying roller 114. A colorant supply roller 111 is provided.

The developer supply roller 111 includes a core material 112 made of a conductor such as stainless steel or steel, and a pile portion 113 made of a polymeric material such as Teflon or nylon provided to cover the periphery of the core material 112. It is a roller that has a so-called brush shape. Note that this pile portion 113 and the color developer s are located at positions apart from each other on a charging array (substances that are easily charged are arranged in order from positive polarity to negative polarity, or from negative polarity to positive polarity). Al to the relationship of substances. The dimensions of individual piles (hair-like bodies) are diameters of 0 and 0.
Desirably, the diameter is about 7 mm and the length is about 2 mm.

Also, in the vicinity of the circumferential surface of the developer carrying roller 114, there is a layer pressure adjusting blade for adjusting the layer pressure of the developer S on the circumferential surface of the developer carrying roller 114 to a predetermined thickness. 11
5, and a cleaning blade 116 for removing excess color developer S that remains even after the color developer adhesion operation.

The developer carrying roller 114 and the cleaning blade 116 are grounded.

The support conveying device 102 also has an electrode roller 1 made of a conductor that faces the color developer carrying roller 114 across a gap d in the adhesion area A and is rotatably provided.
20, a guide roller 12l1122 provided apart from this electrode roller 120, and these electrode rollers 120.
and guide rollers 121 and 122 to transport the support P, and the electrode roller 12
0 and has an AC power supply 124.

Next, the operation of the color developer coating device 100 according to the present invention will be explained.

The developer carrying roller 112 is driven by a motor (not shown).
Then, the developer supply roller 111 rotates, and the developer S stored in the developer storage tank 110 is transferred to the vicinity of the developer carrying roller 114 by the developer supply roller 111 . Since the surface of the developer supply roller 111 is covered with a brush-like pile portion 113, it is efficiently charged due to the frictional force acting between the developer S and the developer supply roller 111. A large amount of color developer S is carried on the color developer carrying roller 114 .

This color developer S is carried on a color developer carrying roller 114, and is further adjusted to a predetermined layer thickness by a layer thickness adjustment blade 115 provided on the downstream side of the color developer supplying roller 111 in the rotational direction of the color developer carrying roller 114. It is smoothed and transported to the attachment area A.

On the other hand, a support P such as plain paper to which a color developer is applied is inserted into the apparatus through an insertion port 103 and conveyed to the attachment area A by a conveyor belt 123.

The electrode roller 120 is made of metal and is connected to the AC power source 12.
Since a high alternating voltage is applied to ground by 4, an alternating electric field is present in the attachment area A. The charged color developer S carried in a layer on the surface of the color developer carrying roller 114 is attracted toward the electrode roller 120 according to the alternating electric field existing in the attachment area A, and the color developer S is deposited on the support P. The color developer layer m is formed. At this time, the color developer S that was not attracted toward the electrode roller 120 even by the alternating electric field is on the surface of the color developer carrying roller 114.
However, these are removed by the grounded cleaning blade 116. The support P coated with the color developer is conveyed by the conveyor belt 123 and is discharged from the discharge port 104E to the outside of the apparatus as a color developer paper.

In the developer coating device 100 according to the present invention described above,
The developer supply roller 111 is constructed by covering its circumferential surface with a brush-like pile portion 113, but this is because the circumferential surface of the developer supply roller 111 is made of a polymeric material and has a shape with a large surface area. You can.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to carry a larger amount of color developer on the surface of the color developer carrying roller than in the conventional example, and as a result, it is possible to carry a larger amount of color developer on the surface of the color developer carrying roller. It is possible to stably apply a larger amount of color developer in a shorter time than with the color developer coating device used.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a color image recording device to which the developer coating device of the present invention is applied. FIG. 2 is a sectional view showing an embodiment of the developer coating device of the present invention. FIG. 3 is a conventional color image recording device. FIG. 2 is a cross-sectional view showing an example of a developer coating device. 1... Color image recording device 2... Exposure device 3... Photosensitive and pressure sensitive paper conveying device 4... Pressure developing device 5... Color developer coating device 6... Heat fixing device 7... Cutter 10...Optical system 15...Microcapsule paper 17 Process 8 19 21 10 10 10 11 11 11 11 1 ↓ 12 12 12 21 21 ,22 22 22...Developer supply roller...Developer Agent carrying roller...Electrode roller...AC power source 0...Developer coating device 1...Developer supply device 2...Support conveyance device 0...Developer storage tank 1. ...Developer supply roller 2...Core material 3...Pile portion 4...Developer carrying roller 0...Electrode roller 3...Transport belt 4...AC power supply 1... Color developer supply roller 2...Developer carrying roller 0...Electrode roller 3...Transport belt 4...AC power source A...Adhesion area P...Support S...Color developer agent

Claims (1)

[Claims] a support conveying means for conveying the support through the attachment area; a developer storage means for storing a color developer; a developer carrying means for carrying and conveying the charged color developer to the attachment area;
a color developer supplying means having a brush-like insulating material surface and installed near the color developer storage means to triboelectrically charge the color developer and supplying the color developer to the color developer supporting means; an electrostatic adhesion device that faces the developer carrying means with a predetermined gap and electrostatically attaches the charged developer to the support being transported by the support transport device; 1. A color developer coating device for producing an image recording medium for image recording by depositing granular color developer on the surface of a support such as plain paper.