JPH0316734A - Image forming device - Google Patents

Abstract

PURPOSE:To simplify a construction by a method wherein a color powder is uniformly electrified and evenly formed in a thin layer form on a powder holding body using a recording unit, a solvent is directly flown to the color powder in accordance with an image signal by a recording means to form a tackified powder image, and only the tackified color powder is transferred to a recording medium. CONSTITUTION:A color powder 2 is evenly formed on a rotating powder holding body 1 in a thin layer form by a layer forming member 30, uniformly electrified by a friction with a layer forming means 3, and adhesively supplied on the powder holding body 1 by an image force in accordance with the charge amount of the powder. At the position of a recording means 5, a solvent is selectively jetted to be flown to the color powder 2 in accordance with an image signal. The application of the solvent causes the color powder 2 of the latent image part to be melted and tackified from the surface of the powder. At a transfer position, the powder is transferred to a recording medium 7, fed by a paper feed means 8, by a transfer means 6, thereafter being fixed to the recording medium 7 by a fixing means 9. In this manner, a device with a simple construction and superior maintainability and handleability can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an industrial field of application.
Although shown in Japanese Patent No. 134433, FIGS. 2 and 3 show the structure of this conventional water jet recording apparatus, in which 101 is a recording head, 102 is an &
103 is a water supply pipe, 104 is an ultrasonic vibrator that injects water, 105 is an electric control circuit a of the ultrasonic vibrator 104, 106 is a nozzle/k, 107 is a corona-charged electric maple that charges the injected water, and 108 is a charging The electromagnetic field deflection enemy 109 is a recording support i110 is a powder cloud of water-soluble colored powder. Water 102 is connected to the electric control circuit 105 and is ejected from the nozzle 106 of the recording head 101 in response to ultrasonic vibration.
02 is charged by the corona charging electrode 107 and flies toward the recording support 109 such as paper or plastic film through the electromagnetic field deflecting plate 108.
Powder cloud 11 of water-soluble colored powder is on the front of 09.
0 is in the shape of 0, and 102 tons of water that rushes into this powder cloud 110 attaches and dissolves the water-soluble colored powder.
It is something that adheres to the recording support 109 and forms an image.
Alternatively, the recording support 1 is sprayed with colored powder l10 in advance.
It is a structure in which an image is formed by spraying water 102 onto G, and powder other than the image is caused to fall by vibration. However, since the powder in the non-image area is vibrated and removed from the recording support by falling, there are problems with maintenance, poor handling, and an increase in the size of the equipment. The present invention has been proposed in view of these points.The purpose of the present invention is to provide an image forming apparatus having a simple structure, ease of maintenance, and ease of handling. a recording unit formed by integrating a body and a layer forming means for forming a thin layer of colored powder on the powder carrier; a solvent for making at least a part of the composition of the colored powder viscous; An image forming apparatus comprising: a recording means for selectively flying a solvent to form an image directly on the colored powder on the powder carrier; and a means for transferring the image-formed colored powder. According to the present invention 1, a thin layer of colored powder is formed on a powder carrier in a simple recording unit such as an electrophotographic developing device, and the thin layer of powder is recorded by a recording means. An image is formed by spraying a solvent directly onto the colored powder on a carrier in response to an image signal, and then transferring the powder image made viscous by the solvent to a recording medium to form an image. Embodiments of the present invention will be described below with reference to the drawings. Figure 1 shows the configuration of an image forming apparatus according to an embodiment of the present invention. 3h
and layer forming member 3. Karanamo 4 is a recording unit, which is an integrated structure consisting of at least a powder carrier 1, a colored powder 2, and a layer forming means 3. It can be attached and detached from the side or front of the device by means of a device frame (not shown), and 44b is movable. 5 is a protective cover for the powder carrier l installed in the
It may also include a solvent supply means (not shown) that selectively causes the solvent to fly toward the colored powder 2 in accordance with the image signal.
6 is the transfer side north, 7 is the recording medium 8 is the paper feed side, and 9 is the fixing means, which is used as the colored powder 2 used in the present invention (top).In terms of maintainability, water-soluble powder is preferable.
Water as disclosed in Publication No. 33 Water Polymer Electrolysis Cellulose-based Polymer Polyvinyl Alcohol/K Polyvinylpyrrolidone, gelatin, starch, and other water-soluble binders, polystyrene, rosin, methylcellulose, and other soluble binders in organic solvents, and acidic dyes. Basic dyestuff Colorants such as soluble dyes and colored pigments are kneaded or adsorbed to form a uniform thin layer of colored powder 2 on powder carrier 1. Fine silica powder, etc. External addition of fluidizing agent and conductive carbon,
It is possible to contain conductive fine powder such as tin oxide as a solvent: Yusui and others: Methyl alcohol/k Ethyl alcohol At. Isobrobyl alcohol/k }
Luene, acetone, etc. can be used as the powder carrier 1 of the present invention. In the image forming apparatus of this embodiment, which is arranged as follows, the operation thereof will be explained below. The supply member 3- stirs and supplies the colored powder 2 in the recording unit 4, and the supply member 3s charges the colored powder 2 to which silica, tin oxide, etc. have been added and supplies it in a fixed amount to the powder carrier 1. The supplied colored powder 2 is sequentially formed into a uniform thin layer by the layer forming member 3 on the powder carrier l rotating in the direction of the arrow in the figure, and is uniformly formed by friction with the layer forming means 3. The powder is charged and attached to the powder carrier l by the mirror image force due to the amount of electric charge of the powder. As a recording means 5 for spraying and flying such a solvent toward the colored powder 2 on the carrier l, a conventional technique such as an inkjet system can be used, and since it is a solvent, there is no clogging. Colored powder 2 in the area that has become a latent image due to the adhesion of L°C solvent (may be dissolved from the surface of the powder and become sticky). The transfer means 6 uses electrostatic adhesion by applying high pressure, or mechanical close contact or pressure contact via an elastic member.
Even if only the sticky part of the colored powder 2 corresponding to the image signal is transferred to the recording medium 7 conveyed by the paper feeding means 8, the colored powder image transferred to the recording medium 7 is thermally fixed. The powder carrier 1 was fixed to the recording medium 7 by the fixing means 9 used in conventional electrophotographic methods such as 1.
X, styrene acrylic resin binder face makeup Non-magnetic toner coloring powder 2 with a particle size of about 10 μm made of a charge control agent such as silica, rayon containing carbon, specific resistance 10% to 108 Ω・Cm Supply member for conductive brush roller 3. and a layer forming member 3 of a urethane rubber blade that presses the powder carrier l with a linear pressure of about 40 g/cm.
The powder carrier was uniformly charged and thinned into 2 to 3 layers by o, and toluene was partially sprayed as a solvent.
According to this embodiment, a recording unit with a simple structure such as an electrophotographic developing device is used. The colored powder 2 is uniformly charged on the powder carrier l and formed into a uniformly thin layer. The non-clogged recording means 5 causes a solvent to fly in response to a direct stirring image signal to form a sticky powder image, and only the sticky colored powder can be transferred to a recording medium to form an image. It is also possible to perform image-format fidelity, development, and transfer only on the instant powder carrier 1. It eliminates the need for a latent image carrier such as a photoreceptor in conventional electrophotographic methods, making it possible to be smaller and thinner. This process includes the operating part, replenishment of colored powder, and color replacement of the recording units 4 of various different colors prepared in advance.This process is easy to maintain and easy to handle since it is only an integrated recording unit. By arranging a plurality of particles on a drum or belt, it can be applied to multi-color or full-color printers and copying machines.As explained above, according to the present invention, a rotating powder is produced by a clogging-free recording means. Image development and transfer is now possible on the carrier, making the process extremely simple.Also, the structure of the recording unit is similar to that of an electrophotographic developer, making it possible to make it smaller and thinner. The only part that the user operates, including replenishment, is the recording unit, making maintenance and handling extremely easy, and the practical effects are significant.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view showing the structure of an image forming apparatus according to an embodiment of the present invention, and Figures 2 and 3 are side views showing the structure of a conventional water jet recording apparatus. body carrier
2... Coloring powder 3... Layer forming hand ratio 4... Recording unit 5... Recording hand ratio 6... Transfer hand north 7
...Recording medium bale 8...Paper feeder 9...Book hand ratio

Claims (1)

[Claims] a recording unit comprising at least a rotating powder carrier and a layer forming means for forming a thin layer of colored powder on the powder carrier; and viscosity of at least a portion of the colored powder composition. An image characterized by comprising a solvent, a recording means for selectively flying the solvent to form an image directly on the colored powder on the powder carrier, and a means for transferring the image-formed colored powder. forming device