JPH0443352A - powder coating equipment - Google Patents

Abstract

PURPOSE:To apply a developing material onto a base uniformly by a large amount by providing a carrier which carries powder and a supply roller which supplies the powder to the carrier, and making a blade abut on only the supply roller. CONSTITUTION:The powder coating device 2 is equipped with the developer carrier roller 22, an electrode roller 23 which is arranged at a specific distance from the developer carrier roller 22, and a conveyor belt 24 extended between the electrode roller 23 and guide rollers 25a and 25b. Further, the rotatable supply roller 21 made of foamed sponge is provided on the upstream side of a developer coating area 27 in the rotating direction of the developer carrier roller 22 while pressed against the developer carrier roller 22. Then the plate type blade 30 is provided at an interval or in contact with the circumferential surface of the supply roller 21 so as to control the amount of the developer S put on the supply roller 21. Consequently, the developer can be applied uniformly onto a base P.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a powder coating device for electrostatically coating charged powder onto a support such as plain paper in image recording, etc. .

[Prior Art] Conventionally, as a color copying machine, a microcapsule paper is exposed to light, this is superimposed on a color developer paper, and then a desired image is recorded on the color developer paper by pressure development. Although it has been put into practical use, the color developer paper used in this color copying machine is commercially available color developer paper coated with a color developer in advance.

However, since using commercially available color developer paper has poor versatility, the applicant has developed a powder that allows users of color copiers to easily create color developer paper using plain paper, etc. A body coating device is proposed, for example, in the specification and drawings attached to the application of Utility Model Application No. 170660/1982.

In this device, a carrier such as a roller carrying a charged powder color developer faces a support such as plain paper in a non-contact state, and an electric field is generated there to develop the color by electrostatic force. This is a device that applies colorants onto a support.

[Problem to be solved by the invention] However, in the powder coating device as described above,
Because the blade is pressed against the carrier to regulate the developer on the carrier, the developer adheres firmly to the carrier, making it difficult for the developer to fly to the support in the transfer area. There was a problem that the amount of coating was reduced. Moreover, if the plate is eliminated, the developer is not uniformly supported on the support, and even if a large amount can be applied, there is a problem that the developer is unevenly applied on the support.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a powder coating device that can uniformly coat a large amount of a color developer onto a support.

[Means for Solving the Problems] In order to achieve this object, the powder coating device of the present invention has the following features:
It is characterized in that it includes a carrier that supports powder and a supply roller that supplies the powder to the carrier, and that a blade is brought into contact only with the supply roller.

[Function] According to the powder coating device of the present invention having the above configuration,
By not providing a blade on the carrier, the developer does not adhere firmly to the carrier, and the developer easily flies to the support in the transfer area, allowing a large amount to be applied to the support. Furthermore, by providing the blade on the supply roller, the amount of developer supplied from the supply roller to the carrier can be adjusted, and the developer can be uniformly supported on the carrier. Thereby, the color developer can be uniformly applied to the support.

[Example 1] Hereinafter, an example embodying the present invention will be described with reference to the drawings.

First, the configuration of a color image recording apparatus M equipped with the powder coating apparatus of this embodiment will be explained with reference to FIGS. 1 and 2.

As shown in FIG. 1, the color image recording apparatus M is broadly divided into an exposure device 1, a powder coating device 2, a pressure developing device 3, and a heat fixing device 4.

An exposure device 1 is provided at the top of a casing C of a color image recording device M. This exposure device 1 includes a halogen lamp 8 that exposes a microcapsule paper 7, and an original platen 1 located below the halogen lamp 8 and on which an original 10 is placed.
It is composed of 1. Here, microcapsule paper (
A latent image is formed on photosensitive pressure sensitive paper 7 by exposure.

A pressure developing device 3 is provided below the exposure device 1 . The microcapsule paper 7 exposed by the exposure device 1 is fed into the pressure developing device 3 via a guide roller 12.

This pressure developing device 3 is composed of a pair of pressure rollers 14 that sandwich the superimposed color developer paper and microcapsule paper 7 and develop them under pressure.

On the other hand, a powder coating device 2 is provided in the center of the casing C of the color image recording device M.

A paper feed cassette 18 is provided on the right side of the powder coating device 2 and stores plain paper P in a stacked manner.The plain paper P is inserted into the powder coating device 2 from an insertion opening 29 by a guide roller 19. The inserted plain paper P is electrostatically coated with powdered color developer S to become color developer paper. The developing paper discharged from the outlet 28 is conveyed by the guide roller 13, and then superimposed on the microcapsule paper 7 on which the latent image has been formed, and supplied into the pressure developing device 3, where it is pressure developed.

A thermal fixing device 4 is provided on the downstream side of the pressure developing device 3, and the developing paper subjected to pressure development is conveyed to the thermal fixing device 4 by a guide roller 15.

The heat fixing device 4 heats and fixes the recorded image on the color developing paper on which the recorded image has been formed. The color developing paper on which the image has been fixed by the thermal fixing device 4 is further conveyed by a guide roller 16 and discharged to the outside of the color image recording apparatus M.

The microcapsule paper 7 is supplied from the paper feed roll 5, passed through each guide roller and the pressure roller 14, and then wound onto the take-up roll 6.

Next, referring to FIG. 2 regarding the powder coating device 2,
Explain in detail.

The powder coating device 2 includes a developer-carrying roller 22, an electrode roller 23 disposed a predetermined distance from the developer-carrying roller 22, and a roller that is connected to the electrode roller 23 and guide rollers 25a and 25b. A conveyor belt 24 is provided. A part of the developer carrying roller 22 is arranged inside the developer case 20 that stores the granular developer S. This color developer carrying roller 22 is grounded,
The electrode roller 23 is connected to a power source 26. As a result, a coating electric field is applied to both rollers 22,23.

Further, on the outer periphery of the developer-carrying roller 22, a rotating roller made of foamed sponge is placed on the upstream side of the developer-carrying roller 22 from the position of the developer-applying area 27. A flexible supply roller 21 is provided in pressure contact with the developer carrying roller 22 . Further, a color developer S is stored inside the color developer case 20, and the supply roller 21 is used to regulate the amount of the color developer S that is placed on the supply roller 21.
A plate-shaped blade 30 is provided with a certain gap or in contact with the circumferential surface of the blade.

The amount of color developer S placed on the supply roller 21 can be regulated depending on the degree of contact between the supply roller 21 and the blade 30. This plate-shaped blade 30 is made of nylon. Note that the supply roller 21 may be a rigid body or an elastic body, or may be a brush-shaped one. Furthermore, an agitator 31 is rotatably supported within the developer case 20. This agitator 31 has a rotating shaft,
It is composed of three plate-shaped wings that protrude from the circumferential surface of this rotating shaft. Each time the agitator 31 is rotated by a drive device (not shown), the developer S in the developer case 20 is agitated. Note that the wings may be flat or comb-like. Also, the number of pieces may be any number.

Next, the operation of the color image recording apparatus M will be explained.

After placing the original 10 on the original table 11, the user presses a start switch (not shown) to start image recording. Then, the 10-gen lamp 8 is turned on, and a latent image of the original 10 is formed by exposure on a part of the microcapsule paper (photosensitive and pressure-sensitive paper) 7 running between the paper feed roll 5 and the take-up roll 6. The microcapsule paper 'l exposed by the exposure device 1 is supplied into the pressure developing device 3. On the other hand, in the powder coating device, when the start switch is pressed, the agitator 31 rotates and the developer S is stirred;
It reaches the supply roller 21. Then, the amount of the developer S supplied to the developer carrying roller 22 is regulated by the blade 30 and reaches the developer carrying roller 22 . Then, the developer adheres to the developer carrying roller 22 and is conveyed to the coating area 27. At this time, the color developer S is transferred to the color developer supporting roller 2.
2 and the supply roller 21, it is electrically charged.

On the other hand, the plain paper P is inserted into the insertion slot 29 by the guide roller 19.
It is inserted into the powder coating device 2 from there. The inserted plain paper P is conveyed to the coating area 27 by the conveyor belt 24. An electric field suitable for the polarity of the charged developer S is applied to the electrode roller 23 by the power source 26, so that
The color developer S charged by electrostatic force is transferred to the color developer carrying roller 2.
2 onto plain paper P, where it is electrostatically applied and becomes color developing paper.

The developer paper discharged from the outlet 28 is conveyed by the guide roller 13, and is then superimposed on the exposed microcapsule paper 7 and supplied into the pressure developing device 3. The microcapsule paper 7 and color developer paper supplied to the pressure developing device 3 are sandwiched between a pair of pressure rollers 14 and subjected to pressure development, and a color image is recorded on the color developer paper. The color developing paper subjected to pressure development by the pressure developing device 3 is conveyed to the heat fixing device 4 by the guide roller 15. The color developer paper is heated by a heat fixing device 4, and the recorded image on the color developer paper is fixed. The color developing paper with the fixed image is further passed through guide roller 1.
6 and discharged to the outside of the color image recording apparatus M.

The present invention is not limited to the embodiments detailed above, but
Various changes can be made without departing from the spirit of the invention.

For example, instead of applying color developer S onto plain paper P,
It may also be applied onto microcapsule paper 7 on which a latent image has been formed.

[Effects of the Invention] As is clear from the detailed description above, according to the present invention, by not providing a blade on the carrier, the color developer does not adhere firmly to the carrier, and the color developer does not adhere to the carrier in the transfer area. The color developer can easily fly to the support, and a large amount can be applied to the support. Further, by providing the blade on the supply roller, the amount of color developer supplied from the supply roller to the carrier can be adjusted, and the color developer can be uniformly supported on the carrier. Thereby, the color developer can be uniformly applied to the support. In other words, it is possible to provide a powder coating device that can stably coat a large amount of color developer onto a support with a very inexpensive configuration, which is an industrially advantageous effect.

[Brief explanation of drawings]

1 to 2 show embodiments embodying the present invention. FIG. 1 is a schematic configuration diagram of a color image recording device to which a powder coating device is applied, and FIG. 2 is a powder coating device. It is a block diagram of a device. In the figure, 2 is a powder coating device, 21 is a supply roller, 22 is a color developer carrying roller (carrier), 30 is a blade, S is a color developer (powder), and P is plain paper (support). be.

Claims (1)

[Claims] 1. A powder coating device that electrostatically coats charged powder by flying it onto a support, comprising a carrier that supports powder and a supply roller that supplies the powder to the carrier, A powder coating device characterized in that a blade is brought into contact only with the supply roller.