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Developing unit for electrophotography system image forming apparatus and process cartridge, and electrophotography system image forming apparatus

An electrophotographic system and developing unit technology, which are applied in the direction of electric recording process applying charge pattern, equipment for applying electric recording process of charge pattern, electric recording technique, etc., can solve the problems such as inability to guarantee image quality, insufficient toner, etc. , to improve the charging efficiency, improve the transmission force, and promote the effect of stirring

Inactive Publication Date: 2011-04-27
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] When the charge amount of the toner is not large enough, it may cause insufficient toner flying to and adhering to the photosensitive member, and in some cases, the quality of the formed image cannot be guaranteed

Method used

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  • Developing unit for electrophotography system image forming apparatus and process cartridge, and electrophotography system image forming apparatus
  • Developing unit for electrophotography system image forming apparatus and process cartridge, and electrophotography system image forming apparatus
  • Developing unit for electrophotography system image forming apparatus and process cartridge, and electrophotography system image forming apparatus

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Embodiment Construction

[0029] Hereinafter, exemplary embodiments of the present invention are described based on the accompanying drawings. figure 1 is a cross-sectional view showing a schematic configuration of the developing unit 10 of the electrophotographic system image forming apparatus of the present embodiment. The electrophotographic system image forming apparatus has a developing unit 10 that supplies toner to a photosensitive member on which an electrostatic latent image is formed and develops the latent image. The developing unit 10 includes a developing roller 14 opposed to the photosensitive drum 12 and two bladed conveying members 16 , 18 for supplying developer to the surface of the developing roller 14 . One bladed conveying member on the developing roller 14 side is referred to as a leading bladed conveying member 16 , and the other bladed conveying member is referred to as a trailing bladed conveying member 18 . The developing roller 14 and the conveying member with a front blade ...

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Abstract

A developing unit includes a developing roller and a carrying member. The carrying member includes a main helical blade and a sub helical blade. The carrying member stirs developers containing a toner by using the main helical blade and carries in an axial direction the developers being fed to the developing roller. The sub helical blade is helically screwed in an opposite direction to the main helical blade in at least a part of the axial direction. Each of the main helical blade and the sub helical blade has carrying power of the developers. The carrying power of the sub helical blade is smaller than the carrying power of the main helical blade.

Description

technical field [0001] The present invention relates to a developing unit, a process cartridge for an image forming apparatus of an electrophotographic system, and an image forming apparatus of an electrophotographic system. Background technique [0002] An electrophotographic system image forming apparatus has a developing unit that supplies toner to a photosensitive member on which an electrostatic latent image is formed and develops the latent image. The developing unit includes a developing roller that faces the photosensitive member and carries a developer containing toner on its surface, and a member for conveying the developer to the developing roller. In JP 5-134540-A, a paddle member for conveying developer to a developing roller and an agitating roller for agitating the developer are disclosed. The developer containing the toner is stirred, thereby charging the toner. Charges accumulated in the toner cause the toner to fly from the developing roller, causing the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08G03G21/18G03G15/00
CPCG03G15/0834G03G2215/083G03G15/0868G03G15/0893
Inventor 山室隆稻叶繁大场正太越智隆
Owner FUJIFILM BUSINESS INNOVATION CORP
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