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Electronic photographic device with ink powder recirculation mechanism

An electrophotographic and recycling technology, applied in the direction of electric recording process applying charge pattern, equipment of electric recording process applying charge pattern, electric recording technique, etc., can solve the problem of image deterioration, etc. blocking effect

Inactive Publication Date: 2003-11-26
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, when the device is miniaturized and its life is improved, the paper powder contained in the recycled toner is mixed into the toner, causing problems such as image degradation

Method used

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  • Electronic photographic device with ink powder recirculation mechanism
  • Electronic photographic device with ink powder recirculation mechanism
  • Electronic photographic device with ink powder recirculation mechanism

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0030] figure 1 It is a schematic configuration diagram of the first embodiment of the electrophotographic device according to the present invention. The photoreceptor 1 having a cylindrical shape as a carrier is supported in the electrophotographic device and can be rotated in the direction of the arrow, and is sequentially arranged around the photoreceptor 1. The charging roller 2 , exposure device 3 , developing device 4 , transfer belt 6 , cleaning blade 7 , rotary blade 8 , recovery coil 9 , and all parts except the transfer belt 6 are accommodated in the PCU 10 .

[0031] The developing device 4 is accommodated in a developing housing having an opening, and the developing sleeve 5 is rotatably supported at the opening, and is disposed close to and facing the surface of the photoreceptor 1 . The agitator 14 is rotatably supported in the developing casing, and is arranged at a position facing the developing sleeve 5 . The screw 12 is processed on the outside of the stirr...

no. 2 example

[0040] Figure 4 It is a schematic configuration diagram of the second embodiment of the electrophotographic device according to the present invention. The developing device 4 constituting the electrophotographic device is provided with an agitator 14, and the same sieve member 16 as that of the first embodiment is provided at the toner inlet. A sliding member 37 is installed on the inner wall of the housing of the developing device 4, which is made of a thin elastic member such as a polyester film. When the stirring member 14 rotates and the sieve member 16 passes through the position facing the sliding member 37, the The front end of the sliding part 37 slides the screen part 16 . In this way, the paper powder in the two-component developer and the recycled toner is actively rubbed on the sieve member 16, the paper powder becomes finer, and at the same time, the sieve member 16 is cleaned to prevent clogging of the sieve mesh. With this structure, the mesh size of the sieve...

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PUM

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Abstract

An electrophotographic apparatus which forms an electrostatic latent image on a photoreceptor includes a developing device configured to accommodate a two-component developer including toner and carrier and to develop the electrostatic latent image with the developer. Toner which has been used for developing the electrostatic latent image is recycled to the developing device so as to be used again. The developing device includes a developer conveying path so as to convey the recycled toner therethrough. A screening member having openings to screen the recycled toner is arranged in the developer conveying path.

Description

technical field [0001] The present invention relates to an electrophotographic device for use in, for example, copiers, facsimile machines, laser printers, etc., which visualizes an electrostatic latent image by a two-component developer composed of toner and carrier to form an image. Background technique [0002] In the past, when an image was formed by electrophotographic processing, a photoreceptor with a photoconductive substance was used as an image carrier, and after the photoreceptor was uniformly charged, the image was exposed to form an electrostatic latent image, and the electrostatic latent image was made with toner. After the image is developed and transferred to a transfer material such as paper, the ink image is fixed by heat and pressure to obtain a printed matter. At this time, the toner that has not been transferred in the transfer process and remains on the image carrier is recovered by cleaning devices such as scrapers or brushes, and is discarded in a rec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/08G03G21/10
CPCG03G21/10G03G21/105G03G15/08
Inventor 唐泽和典
Owner RICOH KK