JPH02178679A - 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 color developer coating device for applying a granular color developer to a support supporting the color developer in image recording.

[Conventional technology]

Conventionally, as a color copying machine, microcapsule paper (photosensitive pressure-sensitive medium) carrying microcapsules containing a dye precursor, a photocurable resin, and a photoffl intermediate initiator as main color substances on its surface is exposed through an original. This exposed microcapsule paper and a color developer paper (color developer medium) in which a dye precursor contained in the microcapsules, that is, a color developer is supported on the surface of the support, are sent to a pressure developing device. For example, a pressure developing device transfers the color image of the exposed microcapsule paper onto a color developer paper, and the color image after pressure development is sent to a heat setting device to obtain a color image on the color developer paper. It is generally known from Japanese Patent Application Laid-Open No. 61-173981.

The color developer paper used here generally had a support coated with a color developer over the entire surface.

[Problem to be solved by the invention]

However, in the case of the color developer paper used in the conventional color copying machine, when the user uses a laser printer or typewriter to print on a portion of the color developer paper on which no image is formed, the entire surface of the color developer paper is printed. Because of the applied color developer, there were problems in that the print was blurred, or depending on the printing method, it could not be printed at all.

The present invention has been made in order to solve the above-mentioned problems, and provides a color developer coating device that can selectively coat a color developer on a support (Ii) to obtain a color developer paper. l!a To share is [1 objective].

[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 in which granular color developer is attached to the surface of the support supporting the color developer. a support conveyance device that conveys the color developer; a color developer conveyance body that charges a granular color developer and conveys the charged color developer to a position facing the support; and a color developer conveyor that supports the charged color developer. This device includes an electric field generating device that generates an electric field that causes the granular color developer to fly toward the body, and a control electrode that is located in the flight path of the particulate color developer and has an opening that controls this flight path.

[Effect]

According to the present invention configured as described above, the granular color developer is charged, the charged color developer is transported to a position facing the support, and the charged granular color developer is directed toward the support. By creating an electric field for the developer to fly toward the target and controlling the electric potential applied to the control electrode, the electric field for the developer can be shielded, making it unnecessary to apply the developer to a part of the holder. The developer is prevented from flying to the area, and the shield is released only to the area that needs to be coated, and the developer is allowed to fly and pass through the opening of the control electrode, and only the developer that has passed through is applied to the support. Make sure to apply it.

〔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 a color developer coating apparatus according to the present invention, and this recording apparatus M has an exposure apparatus It1. 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 color developer '12 (Ii device 2) is provided, and a pressure developing device 3 is provided near the color developer application 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 color developer S by the developer coating device 2 are rolled together under pressure. The microcapsule paper 7 is developed and the color image on the microcapsule paper 7 is transferred to the developer paper. The color developing paper subjected to pressure development by the pressure developing device 3 is sent to a heat setting tube device 4, and this heat setting device 4 performs a fixing action on the color developing paper.

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, 1.2 are provided on the left and right sides of this original platen 11, and the microcapsule paper 7 exposed at the lower part of the exposure device 1 is transferred to the guide rollers 12, 1.2 provided on the downstream side thereof. is supplied into the pressure developing device 3 as a red color.

Said color developer #12! The developer paper coated with the developer S on the support P by the I'li device 2 is placed between the pressure rollers 14 and 14 of the pressure development device 3 while being superimposed on the microcapsule paper 7 by the guide roller 13. The pressure developing action is performed by the pressure of the pressure roller 14.

The microcapsule paper 7 that has passed through the pressure developing device 3 is wound up by a take-up roller 6, and the color developing paper that has passed through the pressure developing device 3 passes through the guide roller 15, passes through the thermal qualification device 4, and is further processed. It passes through the guide roller 16 and is discharged to the outside.

As shown in detail in FIG. 2, the developer applying device 2 includes a developer carrying sleeve 21 which serves as a developer carrier carrying the granular developer S, and a developer carrying sleeve 21 with a predetermined distance from the developer carrying sleeve 21. A conductive roller 22 as a counter electrode arranged at a distance is carried, and this conductive opening roller 22 and a belt roller 23 (first
A conveyor belt 24 for conveying the support P in a temporary tube is passed between the support body P and the support body conveyance device.

Further, in the gap between the carrying sleeve 21 and the conductive roller 22, as shown in detail in FIG.
A control electrode plate 27 is arranged, which includes a plurality of control grJ electrodes 25, 25, .

In addition, in FIG. 3, a plurality of openings 26b, 26b, . . . are provided in the upper part of the insulating IA plate 26 in the horizontal direction. It is for.

The color developer carrying sleeve 21 is made by covering a metal core 21a with an insulating material 21b, and is placed on the side of the color developer case 28 that stores the granular color developer S. Above the blade 21, there is a blade 2 in contact with the blade 21.
In addition, the bottom plate of the developer case 28 is provided with a collection blade 30 that protrudes toward the developer carrying sleeve 21 . Furthermore, the color developer i'FIJ carrying sleeve 21 is located inside the color developer case 28.
A static elimination brush 31 is disposed in contact with the outer circumferential surface of.

The metal core 21a is grounded, the conductive roller 22 is connected to a voltage source 32 to which a negative fUS voltage is applied, and each control electrode 25 is connected to a control voltage source 33 capable of controlling the potential applied thereto. It is connected to the. The metal core 21a1, developer carrying sleeve 21, conductive roller 22, and voltage source 32 constitute an electric field generating device.

The developer carrying sleeve 21 rotates in one direction as shown in FIG. 2, and the conductive roller 22 also rotates clockwise in the same figure.

The support P such as plain paper is then sent to the developer coating device 2 by the feed roller 19 from the upper opening of the cassette 18 shown in FIG.

Then, by rotating the developer-carrying sleeve 21 in the clockwise direction in FIG.
1 and the blade 29, and is charged to, for example, a positive potential by the frictional force with the developer-carrying sleeve 21, and is uniformly charged by the blade 29, and the developer-carrying sleeve 2
1, and in this state is conveyed toward a position facing the conductive roller 22.

Here, the granular color developer S that has been charged and transported to a position facing the conductive roller 22 is controlled by the voltage of the conductive roller 22.
Depending on the voltage of t[25, 25..., the color developer S flies in the direction of the support P only when it corresponds to a part of the support P that requires application of the color developer S, and the color developer [ The color developer S remaining in the color developer holding sleeve 21 is collected by the collection blade 3θ into the color developer case 28, and the color developer S remaining in the color developer holding sleeve 21
The remaining charge is removed by a charge removal brush 31.

The operation of controlling the flight of the charged color developer S will be explained with reference to FIG.

FIG. 3(a) shows the initial state, in which the control electrode 25.
25... are held at the ground voltage by the control gIli''!i pressure source 33. Therefore, they are positively charged and carried on the color developer carrying sleeve 21, and are transferred to the conductive roller 22.
The color developer S that has been conveyed to the position facing the color developer S remains held on the color developer carrying sleeve 21. this is,
The color developer carrying sleeve 21 and the control electrodes 25, 25, . This is because the flying electric field formed by the voltage Va is shielded by the control electrodes 25, 25, and has no effect on the positively charged developer S on the developer-carrying sleeve 21. .

Next, from this state, the areas of the support P where the developer S needs to be applied are the openings 25a, 25 of the control 8 electrodes 25, 25...
When the position corresponding to 1.a is reached, as shown in FIG. A predetermined negative voltage Vc is applied to the control voltage 25°25... Then, the color developer S applied to the positive potential is applied to the negative voltage Vc of the control electrodes 25, 25...
The electric field created by the control electrode 25.25...
・A part of it flies toward the control electrode 25.25.
・Opening 25a.

25a, 25a... and the openings 26a, 26a... provided in the insulating substrate 26, and then the conductive roller 22
It is attracted to the electric field created by the negative potential Va and adheres to the support P. Further, the color developer S that did not pass through the openings 26g and 25a is supported on the surface of the insulating substrate 26 of the go control electrode plate 27.

Note that since the control electrodes 25, 25, etc. correspond to areas of the support P where application of the color developer S is unnecessary, the color developer S is applied to areas to which no negative potential is applied. The agent remains supported on the agent-carrying sleeve 21.

Next, as shown in the same figure (c), the control voltage is 25°25.
When a predetermined iE voltage vb of opposite polarity is applied to ..., the color developer S supported on the surface of the insulating substrate 26 of the control vsfr1 polar plate 27 is returned to the color developer supporting sleeve 21,
According to this rotation, the developer is collected into the developer case 28 via the collection blade 30.

In this way, the control electrode 2
5.25 By changing the voltage applied to..., you can easily and reliably apply the developer S only to the areas of the support P where it is necessary to apply the developer S, and avoid applying the developer S to unnecessary areas. This prevents the developer S from being applied.

In the above embodiment, an example was shown in which the color developer S was charged to a positive potential, but it may be charged to a negative potential. In this case, each? The polarity of the voltage applied to 11132.33 is opposite to the above.

Furthermore, for example, without using the conductive roller 22 to generate the flying electric field of the color developer S, a charged body or an electret may be placed at this thz. As a method of transporting the charged color developer S, it may be carried on an air flow.

Further, the method of band td of the color developer S is not limited to triboelectrification, and may be conducted through a charge generated in a charge generator such as a corotron.

In addition, in order to uniformly apply the color developer S to the support Pl:
Not only can a large number of openings be formed by the control electrode 1liIE27, or the control electrode plate 27 can be made to vibrate from side to side, but also a single slit-shaped opening extending in the horizontal direction can be provided. good.

〔Effect of the invention〕

As is clear from the detailed description above, according to the present invention, the color developer on the support is controlled by controlling the voltage applied to the control electrode while the support moves in a position facing the control electrode. Apply 1!11 color developer only to areas that require application.
(Ii L,...) It is possible to avoid applying the color developer to unnecessary areas.

Therefore, it is possible to completely eliminate the conventional drawbacks associated with the color developer being applied to the entire surface of the support, such as the fact that the print by laser printers etc. may be blurred or cannot be printed at all. be.

1... Exposure device, 2... Color developer coating device, 3...
Pressure developing device, 4... Heat setting device, 21... Color developer carrying sleeve, 22... Conductive roller, 24... Conveyor belt, 25... Control electrode, 25a... Same opening ,2
6... Insulator substrate, 26a, 26b... Same opening, 2
7... Control electrode plate, 29... Blade, 32...
Voltage source, 33... control voltage source.

Claims (1)

[Claims] A color developer application device that attaches granular color developer to the surface of a support that supports a color developer includes a support conveying device that conveys the support, and a support conveying device that electrifies the granular color developer. a color developer transporter that transports the subsequent color developer to a position facing the support; an electric field generator that generates an electric field that causes the charged color developer to fly toward the support; and a granular color developer. and a control electrode located in the flight path of the color developer and having an opening for controlling the flight path.