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Developing device and image forming device

A developing device and developer technology, which are applied in the direction of electric recording process applying charge pattern, equipment for electric recording process applying charge pattern, electric recording technique, etc. Uniform and other problems, to achieve the effect of a permanent and stable development state

Inactive Publication Date: 2004-07-28
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] However, in the conventional developing device described above, the conveyance direction of the developer coincides with the rotational movement direction of the image carrier. No measures are taken at all to suppress unevenness of toner density

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0125] 1 is a schematic cross-sectional view showing the structure of a digital copying machine as an example of an image forming apparatus to which a developing device according to an embodiment of the present invention is applied. The digital copier 10 has a scanning unit 10A at the top, a printer unit 10B at the middle, and a paper feeding unit 10C at the bottom, forming a simple U-shape. The scanning unit 10A is equipped with a transparent and hard glass document table 15 exposed on the upper surface of the digital copying machine 10, and a light source lamp 11, mirrors 12a to 12c, lenses 13, and photoelectric conversion elements (hereinafter referred to as CCDs) are provided below the document table 15. 14.

[0126] The exposure lamp 11 reciprocates parallel to the lower surface of the document table 15 together with the mirror 12 a to expose the image surface of the document placed on the upper surface of the document table 15 . The mirrors 12b, 12c reciprocate in paral...

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PUM

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Abstract

A developing device and image forming device. On surfaces of insulating layers 1b and 1c of a transportation member 1, a protective layer 1d having a volume resistivity of 10<10 >Omega.cm to 10<17 >Omega.cm is so laminated that a sum of thickness of the insulating layers 1b and 1c is less than intervals between adjacent ones of progressive wave generating electrodes 2. With this arrangement, it is ensured that a progressive wave electric field generated by the progressive wave generating electrodes 2 is exposed beyond a surface of the transportation member 1. Even if developer T and the transportation member 1 contact each other, a surface potential of the transportation member 1 is not changed. Moreover, firm adhering of the toner T to the surface of the transportation member 1 is prevented. It is therefore possible to certainly transport the developer T to a development position always stably.

Description

technical field [0001] The present invention relates to a developing device and an image forming device for developing an electrostatic latent image formed on an image carrier using a developer in an electrophotographic image forming device, and particularly relates to transporting a developer to an image using a traveling wave electric field. A developing device and an image forming device at a developing position on the carrier. Background technique [0002] The present invention relates to a developing device that uses a developer to develop an electrostatic latent image formed on an image carrier in an electrophotographic image forming device, and particularly relates to a developing position that uses a traveling wave electric field to transport the developer to the image carrier the developing device. [0003] As a developing device suitable for image forming devices such as copiers and printers that perform electrophotographic image formation, the developer carrier t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08
CPCG03G15/0818G03G15/08G03G2215/0651G03G2215/0656G03G2215/0653
Inventor 佐久间将实足立克已上村太介户泉洁后藤利充
Owner SHARP KK
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