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Developing device and image forming apparatus

A developing device and developer technology, applied in the direction of electric recording technology using charge pattern, equipment and instruments of electric recording technology using charge pattern, etc., can solve the problem of easily agglomerated toner

Inactive Publication Date: 2009-07-15
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the conventional image forming apparatus of the reverse development method, floating toner tends to accumulate at the rear end of the image in an area where image quality is easily determined.

Method used

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  • Developing device and image forming apparatus
  • Developing device and image forming apparatus
  • Developing device and image forming apparatus

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Experimental program
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Embodiment Construction

[0028] Hereinafter, preferred embodiments for carrying out the present invention will be described based on the drawings.

[0029] image 3 It is a schematic front cross-sectional view of an image forming apparatus 100 equipped with a developing device according to an embodiment of the present invention. The image forming apparatus 100 is a tandem color image forming apparatus that forms an image using developers of four colors: yellow, magenta, cyan, and black. In image forming apparatus 100 , a two-component developer composed of toner and carrier is used as a developer. The image forming apparatus 100 records image data on paper as a recording medium based on image data read by a document reading device or image data transmitted from a terminal device such as a PC (Personal Computer) connected via a network not shown. Form a color image or a black and white image.

[0030] The image forming apparatus 100 includes a paper feed tray 110 , an intermediate transfer unit 120 ...

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Abstract

This invention, by a layer thickness restricting member, restricts a layer thickness of a developer born on a peripheral surface of a developer bearing member which feeds the developer at a developing region in a developer feeding direction which is opposite to an electrostatic latent image feeding direction, at a position upstream of the developing region in the developer feeding direction. In addition, this invention, by a spike-height restricting member, restricts a spike height of the developer caused to project like spikes on the peripheral surface of the developer bearing member, at a predetermined position upstream of a proximal position at which an electrostatic latent image bearing member and the developer bearing member are closest to each other and downstream of the layer thickness restricting member in the developer feeding direction.

Description

technical field [0001] The present invention relates to a developing device mounted on an electrophotographic image forming device using a two-component developer composed of a toner and a carrier as a developer, and particularly relates to a method in which a developer carrier in a developing area conveys the developer A developing device of a reverse developing method in which the direction and the direction in which the electrostatic latent image is conveyed by the electrostatic latent image carrier are opposite to each other, and an image forming apparatus equipped with the developing device. Background technique [0002] An electrophotographic image forming device includes a developing device having a developer carrier and an electrostatic latent image carrier that carries an electrostatic latent image. The peripheral surface of the electrostatic latent image carrier supplies a developer to visualize the electrostatic latent image. [0003] As the developing method of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08
CPCG03G2215/0609G03G15/0812G03G15/09
Inventor 浜田敏正
Owner SHARP KK