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Developing device, image forming apparatus and process cartridge

A technology of developing device and imaging equipment, which is applied to the equipment of electric recording technology using charge pattern, electric recording technology, optics, etc., and can solve the problems of poor chargeability and flowability of toner, deterioration of developer, etc. , to achieve the effect of preventing the reduction of fluidity and high-density images

Active Publication Date: 2009-08-05
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Two-component developers have disadvantages that the developer deteriorates as toner particles adhere to the surface of the carrier; and the mixture of toner and carrier needs to be maintained at a certain ratio so that the density of the toner in the developer Will decrease with toner consumption
This significantly deteriorates the chargeability and flowability of the toner

Method used

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  • Developing device, image forming apparatus and process cartridge
  • Developing device, image forming apparatus and process cartridge
  • Developing device, image forming apparatus and process cartridge

Examples

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Embodiment Construction

[0103] Exemplary embodiments of the present invention will be described in detail below with reference to these drawings. The present invention is not limited to these embodiments.

[0104] Figure 1A and 1B is a schematic diagram of the developing device 30 according to the first embodiment of the present invention. The developing device 30 includes a photoconductive belt 11 (see Figure 6 ) and a developing unit 31 that develops a latent image on ) and a toner cartridge 32 that supplies toner to the developing unit 31 .

[0105] The developing unit 31 faces the photoconductive belts 11, and includes a developing sleeve 31a, which is a developer carrier for conveying toner to a developing area formed between the photoconductive belts 11; The toner is supplied onto the developing sleeve 31a; the regulating roller 31c, which is a layer thickness regulating member for regulating the amount of toner on the developing sleeve 31a; and the first conveying paddle 31d, which is use...

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PUM

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Abstract

A developing unit that develops a latent image on an image carrier with toner. The toner cartridge is detachably arranged side by side with the developing unit, and supplies toner to the developing unit. An opening is provided between the developing unit and the toner cartridge through which toner passes. The toner cartridge includes a space forming unit to form a space in toner stored in the toner cartridge. This space allows toner to flow in from the developing unit.

Description

technical field [0001] The present invention relates to a developing device for image formation by an electrophotographic method, a process cartridge and an image forming apparatus using the developing device. Background technique [0002] Office automation is becoming more common, and the use of color documents is growing. In the past, office equipment was primarily used to obtain copies of documents consisting only of text. Currently, documents including graphics such as charts are produced in personal computers, printed out from printers, and obtained in large numbers to produce presentation materials, for example. Images output from the printer include solid images, line images, and halftone images. Therefore, requirements for image quality are changing, and high reliability is increasingly required. [0003] Electrophotographic methods such as electrostatic recording and electrostatic printing include a development process for developing an electrostatic latent image...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/08
Inventor 田中真也远藤修一饭尾雅人
Owner RICOH KK
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