JPH02307554A - 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 granular color developer to a support such as plain paper for image recording.

[Prior Art] Recently, as a color copying machine, microcapsule paper is exposed to light through an original, and the exposed microcapsule paper and color developer paper, which is a support such as plain paper coated with a color developer, are transferred to a pressure developing device. A type of paper that transfers the color image of the exposed microcapsule paper onto color developer paper using this pressure development device, and then sends this pressure-developed color developer paper to a heat fixing device to obtain a color image on the color developer paper. has appeared.

The color developer paper is prepared by coating a color developer such as acid clay and a binder on a support such as plain paper.

As a color developer application device for applying a color developer onto a support such as plain paper, there is a type that applies a granular color developer onto a support such as plain paper using a charging effect. exist.

That is, as shown in FIG. 3, the known developer coating device
Support insertion slot in the outer box! A developer paper outlet O is formed. A color developer tank 50 for storing granular color developer S is provided inside the outer box, and this tank 50
A rotating color developer carrying roller 52 and a replenishment roller 51 mounted under pressure on this carrying roller 52 are provided inside.

The developer carrying roller 52 and the replenishing roller 51 rotate with each other, and the developer S is negatively charged by friction on their contact surfaces. This negatively charged color developer S adheres to the circumferential surface of the color developer carrying roller 52, and at this time, the blade 56
The deposit thickness is kept constant by The aforementioned color developer S is
A counter electrode roller 5 provided opposite to the carrier roller 52
Attracted in direction 3.

A positive voltage is applied to the counter electrode roller 53 from a DC power source E. Between this opposing electrode roller 53 and guide rollers 55 and 55 arranged at a distance on the rear side,
A conveyor belt 54, which serves as a counter electrode, is passed around and is moved by the rotation of the counter electrode roller 53 and the like. A support P such as plain paper that supports the color developer S is adsorbed and conveyed by the conveyor belt 54 . Then, at a position where the color developer carrying roller 52 and the counter electrode roller 53 are closest, the negatively charged granular color developer S flies through the space and adheres to the support P. A colorant layer was formed.

[Problem to be solved by the invention]

However, in the conventional color developer coating device,
Particulate color developer S adheres to the surfaces of the conveyor belt 54 and the counter electrode roller 53, which are counter electrodes, due to breaks in the support P that is sequentially transported.

Furthermore, once attached, it is very difficult to remove the granular color developer S from the conveyor belt 54 and counter electrode roller 53 because it is a nonconductor. For this reason, the color developer S is deposited on the conveyor belt 54, and the gap between the conveyor belt 54 and the support P is not constant, and as a result, the color developer S is uniformly deposited on the support P.
There was a problem that it became impossible to apply.

When pressure development is performed by overlapping a color developer paper with a non-uniform developer layer formed on its surface and a microcapsule paper, unevenness will occur in the image.

The present invention was made in order to solve the above-mentioned problems, and it is possible to apply a color developer only to the support and prevent the developer from adhering to the counter electrode (transport belt, counter electrode roller). The object of the present invention is to provide a color developer coating device.

[Means to solve the problem]

In order to achieve this objective, the developer coating device of the present invention includes:
In image recording, a granular color developer is charged and adhered to a color developer carrying roller, and a counter electrode roller is opposed to this developer carrying roller with a predetermined gap, and conveyance is carried by this counter electrode roller. A color developer application device that causes the charged granular color developer to fly and migrate in the direction of a support supporting the color developer, such as plain paper, which is attached to and moves on a belt, and is caused to adhere to the support. , a flight sleeve control means for opening and closing a flight path of the color developer disposed in a space through which the granular color developer flies and migrates toward the support; The apparatus includes a detection means for detecting the presence or absence of the support, and a control means for controlling the flight control means so that the particulate color developer can fly after the detection means detects the presence of the support.

(Function) A detection means disposed close to the conveyor belt detects the presence or absence of a support. After a predetermined delay after the detection, the flight control means opens and closes the flight path of the color developer via the control means, thereby detecting the presence of the support. The color developer charged on the colorant carrying roller flies toward the counter electrode when the flight control means opens the passage, and stops flying when the passage is closed.

According to the present invention configured as described above, since the flight control means is brought into a flying state only when the support is conveyed to a predetermined position, the color developer charged and attached to the color developer carrying roller is It moves to the counter electrode side only during the period in which it can fly. Therefore, the color developer adheres only to the support and does not adhere to other parts.

〔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 device 1. As shown in FIG. This exposure device 1 exposes a microcapsule paper (photosensitive and pressure sensitive paper) 7 running between a paper feed roll 5 and a take-up roll 6 through an original 10 .

Approximately at the center of the casing C of the color image recording device M, a developer coating device 2, which will be described in detail later, is provided.
A pressure developing device 3 is provided near the color developer coating device 2. In this pressure developing device 3, the microcapsule paper 7 exposed by the exposure device 1 and the developer paper on which the developer S is coated on the support P by the developer coating device 2 are superimposed and pressed together. The microcapsule paper 7 is developed and the color image on the microcapsule paper 7 is transferred to the developer paper. After pressure development has been performed by the pressure developing device 3, the color developing paper is subjected to a fixing action by a heat fixing device 4.

The exposure device 1 has a halogen lamp 8, and below the halogen lamp 8, a rotating color separation filter 9 for three primary colors is provided. An original 10 is placed on an original table 11 below this color separation filter 9 . Guide rollers 12.12 are provided on the left and right sides of this document table 11, and the microcapsule paper 7 exposed by the exposure device 1 is further passed through the guide rollers 12.12 provided on the downstream side, and is then exposed to the pressure described above. It is supplied into the developing device 3.

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 roller 14° of the pressure development device 3. Sent in 14 hours. A pressure developing action is performed by the pressure applied by the pressure roller 14.

The microcapsule paper 7 that has passed through the pressure developing device 3 is wound up by a winding roller 6. The pressure developing device 3
The developing paper passes through the guide roller 15, passes through the heat fixing device 4, and further passes through the guide roller 16, and is discharged to the outside.

The detailed configuration of the developer coating device 2 is shown in FIG. 2. Note that the same reference numerals are given to the constituent members already explained in FIG. 3, and detailed explanation thereof will be omitted.

As shown in FIG. 2, a shutter (flight control means) 20 is disposed in a space between the developer carrying roller 52 and the counter electrode roller 53. The shutter 20 includes a storage section 21 and a receiver section 25 that is disposed with an opening 26 between which the developer S can fly.

The storage section 21 stores a shutter blade 23 for opening and closing the flight path of the color developer, and a guide roller 24 for guiding the biased shutter blade 23 is provided inside the storage section 21 . The bone portion 25 receives the shutter blade 23 protruding from the storage portion 21.

A color developing paper detection section 27 for detecting the presence or absence of the support P is provided below the counter electrode roller 53.

Then, as shown in FIG. 1, the support is sent from the upper opening of the cassette 18 to the developer coating device 2 by the feed roller 19.

The developer coating device 2 configured as described above operates as follows.

First, as shown in FIG. 2, as the developer carrying roller 52 rotates counterclockwise, the granular developer S is drawn between the developer carrying roller 52 and the blade 56. Due to the frictional force between the color developer S and the color developer carrying roller 52, the color developer S is negatively charged, for example. The color developer S is uniformized in thickness by the blade 56 and then transferred to the color developer carrying roller 5.
2 and is conveyed toward a position facing the opposing electrode roller 53 at the shortest distance. However, since the shutter blade 23 of the shutter 20 is closed, the color developer S cannot fly toward the counter electrode.

On the other hand, as described above, the support P sent out by the feed roller 19 is conveyed by the conveyor belt 54.

When the support P eventually passes in front of the support detecting section 27, it is detected by the detecting section 27, and a detection signal is generated.

This detection signal is sent to the control unit CON. Furthermore, when the support P is conveyed by a predetermined amount and reaches the portion opposite the opening 26 of the shutter 20, the control unit CON controls the shutter blade 23 to open, thereby opening the flight path for the color developer. Then, the color developer S flies through the opening 26 and is transferred and coated on the surface of the support P being conveyed by the conveyor belt 54. Then, the terminal end of the support P is detected by the support detection section 27, and when the support P is conveyed by a predetermined amount, the shutter blade 23 is controlled to close the opening 26 by the control section CON. That is, the opening 26 is opened only when the support P is present, and is closed at other times.

Further, a support (not shown) that is transported next to the support P is detected by the support detection section 27, and the shutter blade 23 is controlled to open again after a predetermined time has elapsed. Then, as described above, the color developer S is transferred and deposited only while the shutter is open.

〔Effect of the invention〕

As is clear from the detailed description above, according to the present invention, the color developer is controlled to fly and transfer only when the support is present, and the color developer is controlled to fly and transfer to the side of the counter electrode such as the support conveyor belt or the counter electrode row 2. The color developer will not adhere to the surface. Therefore, the developer is not deposited on the counter electrode, and the gap between the developer carrying roller and the support is maintained at a predetermined value. Therefore, it becomes possible to uniformly apply the granular color developer to the surface of the support.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a color image recording device to which a 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, and FIG. 3 is a conventional color image recording device. FIG. 2 is a sectional view showing a one-color agent coating device. 1... Exposure device, 2... Color developer coating device, 3...
Pressure developing device, 4... Heat fixing device, 2o... Shutter (flight control means), 23... Shutter blade, 26...
...Opening part, 27...Support detection part, 52...Developer carrying roller, 53...Counter electrode roller, 54...
Conveyor belt, S...color developer, P-...support, CO
N...Control unit. Applicant's agent Yasushi Ishikawa Figure 1

Claims (1)

[Scope of Claims] A granular color developer for image recording is charged and adhered to a color developer carrying roller, and a counter electrode roller is opposed to this developer carrying roller with a predetermined gap, and this counter electrode The charged granular color developer is moved in the direction of a support that supports the color developer, such as plain paper, which is attached to and moves on a conveyor belt conveyed by a roller, and is adhered to the support. The color developer coating device includes: a flight control means for opening and closing a flight path for the color developer disposed in a space in which the granular color developer flies and migrates toward the support; a detection means for detecting the presence or absence of a support, and after the detection means detects the presence of the support, controlling the flight control means so that the granular color developer can fly toward the support; A color developer coating device characterized by comprising a control means.