JPH02137851A - Developer coating device - Google Patents

Abstract

PURPOSE:To eliminate print blurring and such a failure that printing is not performed at all by providing a recovery electrode which is applied with a voltage having the opposite polarity from a developer charged electrostatically on a base selectively on the downstream side of the developer electrostatic sticking device in the conveyance direction of the base. CONSTITUTION:A base conveying device which conveys the base 8 as normal paper, etc., is provided and the developer electrostatic sticking device 9 which charges the developer 5 electrostatically is provided along the run path of the base 8 conveyed by the base conveying device. Then, the recovery electrode 14 which is applied with the voltage having the opposite polarity from the developer charged electrostatically on the base selectively is provided on the downstream side of the developer electrostatic sticking device 9 in the conveyance direction of the base 8. This recovery electrode 14 removes the developer 5 at an optional position on the base 8 and even after a color image is formed finally, the removed part on the developed paper can be secured as a print formation part. Consequently, even if printing is performed at the print formation part by a laser printer, typewriter, etc., the print blurring and the failure that the printing is not performed at all are eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a color developer coating device for selectively coating a color developer on a support such as plain paper in image recording.

[Conventional technology]

Recently, in color copying machines, microcapsule paper is exposed through the original, and the exposed microcapsule paper and developer paper, which is plain paper or the like coated with a color developer, are sent to a pressure developing device. A type of apparatus has appeared in which a color image on microcapsule paper after exposure is transferred onto color developer paper, and the color image after pressure development is sent to a heat fixing device to obtain a color image on the color developer paper.

The color developer paper is made by coating a color developer such as acid clay and a binder on plain paper. There is a type of apparatus that applies electrophotographic technology and applies a powdered color developer onto a support such as plain paper using a charging effect.

That is, as shown in FIG. 6, the known color developer application device has a color developer tank 50 for storing a powdered color developer S, and a rotating sleeve is installed in this tank 50. 5
2, and a replenishment roller 51 that is pressed into contact with this sleeve 52. The sleeve 52 and the replenishment roller 51 rotate to frictionally charge the color developer on their contact surfaces, and the charged color developer adheres to the circumferential surface of the sleeve 52 and is provided opposite the sleeve 52. facing roller 5
Attracted in direction 3. The opposing roller 53 is also charged by the power source 58, and the opposing roller 53 and the guide roller 55, 55 spaced apart from the rear side of the opposing roller 53 are connected to each other.
A conveyor belt 54 runs between them. A plain paper P is adsorbed and conveyed by the conveyor belt 54, and at a position closest to the sleeve 52 and the facing roller 53, a charged powdery color developer flies onto the support P such as the plain paper due to electrostatic force. Then, the color developer layer m is formed.

[Problem to be solved by the invention]

However, a support such as plain paper coated with a color developer in this way is overlaid with the exposed capsule sheet and subjected to pressure development, but the color developer in such a color developer coating device is applied to the support P. It is coated on the entire surface of the support P.
It was impossible to apply a color developer only to an arbitrary position on the surface. Therefore, when a user uses a laser printer, typewriter, etc. to print on a color image forming support after fixing it on a part of the support P on which an image is not output, the color developer applied to the entire surface of the support There were problems with the printing being blurred or not being able to be printed at all.

In view of this, an object of the present invention is to provide a developer coating device that can selectively remove a developer from any position on a support such as plain paper.

[Means to solve the problem]

Therefore, the present invention provides a support conveying device for conveying a support such as plain paper, and a developer charging device for charging a color developer 11 on the support conveyed by the support conveying device. In the developer coating device, a voltage having a polarity opposite to that of the charged developer on the support is selectively applied to the downstream side of the developer charging and deposition device in the conveying direction of the support. A recovery electrode was installed.

[Effect]

A color developer charging and adhering device is provided with a support conveying device for conveying a support such as plain paper, and is configured to charge and adhere a color developer along the travel path of the support conveyed by the support conveying device. A recovery electrode to which a voltage having a polarity opposite to that of the charged developer on the support is selectively applied was provided on the downstream side of the developer charging and adhering device in the transport direction of the support. This recovery electrode can remove the color developer from any position on the support such as plain paper, and after the final color image is formed, this removed area on the color developer paper can be secured as a print forming area, and this print Even if the formed part is printed with a laser printer, typewriter, etc., the print will not be blurred or cannot be output at all.

〔Example〕

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

In FIG. 1, a color image recording apparatus M to which the developer coating device of the present invention is applied has a casing 1, and a document table 3 is provided on the upper surface of the casing 1.
The manuscript ``is preserved.''

On the other hand, a tray 2 is provided on the side wall of the casing 1, and a developing paper on which a final color image is formed is discharged onto the tray 2. The document table 3 forms a part of an exposure device 30, and this exposure device '30 has a light source 20, and the light beam from the light source 20 is reflected by the document r, passes through the lens g, and is directed onto the capsule sheet 6. to expose. This capsule sheet 6 is fed horizontally from the paper feed roll 4,
A guide roll 22 provided on the left side of the exposure device 30
The image is then reversed, passes through the pressure developing device 16, and is taken up by the take-up roller 21. The pressure developing device 16 has a pressure roll 15.15, on which a developer paper coated with a color developer is superimposed on a support 8 continuous with the exposed capsule sheet 6. The color latent image formed on the capsule sheet 6 is transferred to the color developer paper by this pressure development, and after this pressure development, the color developer paper is thermally fixed by passing through a heat fixing device 17, and further transported. The sheet passes through the roll 40, is cut at a predetermined pitch by a cutter 26 and a cutter receiver 27 that cooperates with the cutter 26, and is discharged to the tray 2 through the outlet 0.

The support 8 is supplied from the supply roll 7, and the continuous support 8 supplied from the supply roll 7 is pulled out by the pressure roll 15 of the pressure development device 16 or the feed roll 40 provided on the right side in the figure. be done. Then, the supply roll 7 and the pressure roll 15, and further the feed roll 4
0 etc. constitute a support conveyance device.

The color developer coating device T of the present invention has a hopper 11 provided above the travel path of the support 8, and this hopper 11
A color developer S is housed inside, and this color developer S is in the form of a powder and is composed of a binder made of acid clay or a thermoplastic substance. A coating roll 12 is provided on the lower surface of the hopper 11, and a supply roller 2 is attached to this coating roll 12.
5 are pressed into contact with each other, and the powdered color developer S is conveyed to the upper surface of the support 8 as the coating roll 12 rotates due to frictional electrification of the peripheral surfaces of the supply roll 25 and coating roll 22. On the other hand, a counter electrode 13 is provided at a position on the support 8 facing the application roll 12, and this counter electrode 13 is negatively charged.

The color developer S is positively charged by frictional charging between the replenishment roll 25 and the coating roll 12, while the counter electrode 13 is negatively charged, so that the coating roll 1
The powdered color developer S conveyed downward by the support 8 is adsorbed onto the upper surface of the support 8 to form a color developer layer m having a constant thickness. The hopper 11, coating roll 12, replenishment roll 25, and counter electrode 13 form a developer deposition device 9.

The color developer adhering device 9 in the running direction of the support 8
A color developer S attached to the support 8 is placed above the downstream side of the support 8.
A recovery electrode 14 is provided, to which a voltage of opposite polarity, that is, negative in this case, is applied.
The color developer S is selectively adsorbed to. A power supply 24 for the counter electrode 14, a pressure roll 15 and a winding roll 21 of the pressure developing device, and further the cutter 2.
6 is connected to the controller 28, and this controller 2
8 controls the operation timing of each member, and an operation panel 29 is connected to this controller 28.

As shown in FIG. 2, the recovery electrode 14 has a length that spans almost the entire length of the support 8, and - by operating the recovery electrode 14 for a certain period of time, a color developer is applied to the inclined surface 18 of the recovery electrode 14. After adhering S, the collection electrode is moved in the width direction of the support 8 to change the polarity opposite to that when adsorbing the developer S, and the developer S on the inclined surface 18 is It is caused to fall into the collection tray 18. As a result, the cleaning process of the recovery electrode 14 is performed. Note that the recovery electrode 14 does not necessarily need to extend over the entire width of the support 8, and may be an electrode 41 having a length a spanning a part of the entire width as shown in FIG. As shown in FIG. 3b, the electrode 42 may have a cylindrical tip.

Next, the operation of the present invention will be explained.

In FIG. 4, an area on the document r on the document table 3 to which the color developer S is not attached is set (step Sl).

That is, as shown in FIG. 5, if you want to form a part on the support 8 corresponding to the right side area W of the original r without applying the color developer S, set its position on the original table 3, The controller 28 calculates which position of the support 8 which is supplied from the supply roll 7 corresponds to the portion W (Step S2), and adjusts the running state of the support 8 to 3.
By calculating 1, the operation timing of the recovery electrode 14 is set, and the support body 8 and the capsule sheet 6 are registered (step S3).

[Effects of the Invention] Since the present invention is configured as described above, it is possible to form a portion where no color developer is applied at any position on the color developer paper on which the color image to be finally output is recorded. This has the effect of allowing printing, etc. to be done freely on that part.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of a color image recording device to which the color developer coating device of the present invention is applied, Fig. 2 is an explanatory diagram of the positional relationship between the recovery electrode and the support, and Figs. 3a and 3b are illustrations of other recovery electrodes. FIG. 4 is a flowchart showing the operation of the present invention; FIG. 5 is an explanatory diagram for setting areas on a document where color developer is not applied; FIG. 6 is a conventional color developer. It is a block diagram of a agent application device. 1... Casing, 2... Tray 3... Document table, 7... Supply roll, 11... Hopper 12...
- Application roll, 13... Counter electrode, 14. ．． 41.4
2...Recovery electrode. Applicant's representative: Yasushi Ishikawa Oyang solid reform procedure dispute city rE document (method) % formula % Display of case Patent application No. 293244 (52B) of 1988 Bufza Kogyo stock extraction target diagram

Claims (1)

[Claims] a support conveyance device for conveying a support such as plain paper;
In a color developer coating device comprising a color developer charging and adhering device for charging and depositing a color developer onto a support conveyed by this support conveying device, the support of the developer charging and depositing device is A color developer coating device characterized in that a collection electrode is provided on the downstream side in the conveying direction to which a voltage having a polarity opposite to that of the charged color developer on the support is selectively applied.