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Developing device and image forming apparatus provided with same

A developing device and image technology, which is applied in the field of developing devices and image forming devices, and can solve the problems of toner scattering and the like

Inactive Publication Date: 2006-04-19
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the technology of JP-A-4-248579, the higher the speed (processing speed) is, the higher the internal pressure in the developing tank is, and the easier it is to cause toner scattering.

Method used

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  • Developing device and image forming apparatus provided with same
  • Developing device and image forming apparatus provided with same
  • Developing device and image forming apparatus provided with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] One embodiment of the present invention will be described with reference to the drawings.

[0023] The developing device 10 of this embodiment, such as figure 2 As shown, it is mounted on a copier (image forming apparatus) 30 .

[0024] The copier 30 functions as a copier, a printer, and a facsimile device, and includes a scanner unit 31 and a laser printer unit (laser recording unit) 32 . In addition, the copier 30, whose processing speed (the conveying speed of paper (recording material, recording medium)) is 100 mm / sec or more, can perform high-speed image formation.

[0025] The scanning part 31 is composed of the following parts: a document placement platform 35 made of transparent glass; a double-sided corresponding automatic document feeder (RADF: Recirculating Automatic Document Feeder) 36, which is used to automatically feed and transport the document onto the document placement platform 35; and a document image reading unit, that is, a scanning unit 40 , fo...

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PUM

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Abstract

The invention appropriately prevents toner scattering in a developing device using a two-component developer containing toner and a carrier. Gaps ds between a developing tank 4 and both ends a in a direction of a rotating shaft of a developing roller 1 on a downstream side in the transporting direction of the developing roller 1 are each set within a range of Dg G03G 15 / 08 G03G 15 / 00 4 18 2 2005 / 10 / 17 1760769 2006 / 4 / 19 100454165 2009 / 1 / 21 2009 / 1 / 21 2009 / 1 / 21 Sharp KK Japan Nagata Tsutomu Kimura Takahiko zhong qiang xie lina 11219 Japan 2004 / 10 / 15 2004-302214

Description

technical field [0001] The present invention relates to a developing device using a two-component developer and an image forming device having the developing device. Background technique [0002] Conventionally, electrophotographic image forming apparatuses (printing apparatuses) such as copying apparatuses, printers, and facsimile apparatuses are provided with photosensitive drums, charging apparatuses, exposure apparatuses, developing apparatuses, transfer apparatuses, and fixing apparatuses. [0003] In such an image forming apparatus, an exposure device exposes a photosensitive surface (electrostatic latent image surface) of a photosensitive drum charged by a charging device to form an electrostatic latent image. Then, the formed electrostatic latent image is developed with toner (developing material) in a developing device to generate a toner image (visible image). Then, after the toner image is transferred to paper (recording material, printing medium such as plain pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08G03G15/00
CPCG03G2215/0609G03G15/0942G03G15/0817
Inventor 长田努木村登彦
Owner SHARP KK
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