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Process card cartridge and image forming apparatus

An image and morphological technology, applied in corona discharge devices, electrography, optics, etc., can solve the problems of uneven wear and uneven concentration of photoreceptors, and achieve the effect of easy maintenance and prevention of excessive wear.

Inactive Publication Date: 2007-03-21
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, strong contact causes uneven wear of the photoreceptor, resulting in uneven density in the circumferential direction.

Method used

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  • Process card cartridge and image forming apparatus
  • Process card cartridge and image forming apparatus
  • Process card cartridge and image forming apparatus

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Embodiment Construction

[0039] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the embodiment of the present invention, a digital camera is used for description. In the following embodiments, although various limitations are made on constituent elements, types, combinations, shapes, relative arrangements, etc., these are merely examples, and the present invention is not limited thereto.

[0040] FIG. 1 shows an example of an image forming apparatus to which the present invention can be applied.

[0041]In the drawing, reference numeral 1 denotes a photoreceptor, reference numeral 2 denotes a charger as a charging means, reference numeral 3 denotes a light beam, reference numeral 4 denotes a developing device as a developing means, reference numeral 5 denotes a transfer roller, reference numeral 6 denotes a fixing device, and reference numeral 6 denotes a fixing device. 7 denotes a cleaning device as a cleaning means, reference numeral ...

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PUM

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Abstract

The invention relates to an image forming apparatus and a rocess card cartridge disposed in its body. The image forming apparatus may include spherical particles with circularity above 0.96, a toner with small diameter, a charging means equipped with a charging brush 2A which has a pile length less than 3 mm and a pile density above 200,000 piles / 6.45 sq. cm and rotates in a counter rotation direction of the photoreceptor while contacting the photoreceptor. The charging brush can effectively make a toner 11 squeeze through a cleaning scraper and form a strip toner. The charging brush satisfies the relationship of 0.4>Rho / L>0.05, wherein Rho is a contact depth of the charging brush relative to the photoreceptor and L is the pile length. The charging brush can effectively dispense the spherical particles and the toner with small diameter squeezes through the cleaning scraper and forms a strip toner.

Description

technical field [0001] The present invention relates to a brush charging means (device) for charging a charged body such as a photoreceptor, a process cartridge provided with the brush charging means, and an image forming apparatus such as a printer, a copier, and a facsimile machine. Background technique [0002] In electrophotographic image forming devices such as printers, copiers, and facsimile machines, the surface of an image carrier is charged, exposed to form an electrostatic latent image, and the electrostatic latent image is developed using a toner to form a visible image. The toner image is then transferred onto a transfer target such as transfer paper, and fixed using a heat roller or the like to form an image. [0003] On the other hand, untransferred toner generally remains on the surface of the image carrier after the toner image has been transferred, and it is necessary to remove the remaining toner by cleaning means before image formation thereafter. In gen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/02G03G21/18
Inventor 藤田哲丸
Owner RICOH KK