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Semiconductor rubber member and developing roller composed of semiconductor rubber member

A technology of rubber parts and semiconductors, which is applied in the direction of electric recording process applying charge pattern, equipment of electric recording process applying charge pattern, electric recording technique, etc., to achieve the effect of suppressing resistance value and preventing the decrease of printing density

Inactive Publication Date: 2007-10-17
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, under low temperature and low humidity conditions, there is room for improvement in the printing density of semiconducting rubber parts

Method used

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  • Semiconductor rubber member and developing roller composed of semiconductor rubber member
  • Semiconductor rubber member and developing roller composed of semiconductor rubber member
  • Semiconductor rubber member and developing roller composed of semiconductor rubber member

Examples

Experimental program
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Effect test

Embodiment Construction

[0168] The semiconductor rubber roller 10 of the present invention is described as a specific embodiment of the semiconductor rubber member of the present invention as follows:

[0169] As shown in FIG. 1, a semiconductor rubber roller 10 serving as a developing roller has: a cylindrical toner conveying portion 1 having a thickness of 0.5 mm to 20 mm, preferably 1 to 15 mm, and more preferably 5 to 15 mm; A cylindrical metal shaft 2 inserted into the hollow portion of the semiconductor rubber roller 10; and a pair of annular sealing portions 3 preventing leakage of the toner 4. The toner conveying portion 1 and the metal shaft 2 are bonded together with a conductive adhesive. The reason why the thickness of the toner conveying portion 1 is set to 0.5 mm to 20 mm is as follows: if the thickness of the toner conveying portion 1 is less than 0.5 mm, it is difficult to obtain an appropriate gap spacing. If the thickness of the toner conveying portion 1 is greater than 20 mm, the ...

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PUM

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Abstract

The present invention provides a developing roller including a semiconductive rubber member having not less than two vulcanized layers including a base layer composed of a vulcanized electro-conductive rubber composition and a surface layer composed of a vulcanized rubber composition. An electric resistance value of the base layer is set to not more than 10<7>Omega, when the electric resistance value of the base layer is measured by applying a voltage of 100V thereto at a temperature of 10 DEG C. and a relative humidity of 20%. An electric resistance value of a laminate of all layers including the base layer and the surface layer is set not more than 10<7>Omega in the same condition as the above-described condition in which the electric resistance value of the base layer is measured.

Description

technical field [0001] The present invention relates to a semiconductor rubber member for a developing roller, a cleaning roller, a cleaning blade, a charging roller and the like mounted on an electrophotographic apparatus. More particularly, the present invention relates to a semiconductor rubber member for a developing roller mounted on an image forming apparatus of an electrophotographic apparatus in which a non-magnetic one-component toner is used, by imparting high electrostatic properties thereto, The toner is transferred to the photoreceptor of the electrophotography. Background technique [0002] In recent years, among printing techniques using electrophotographic methods, high-speed printing operations, formation of high-quality images, formation of color images, and miniaturization of image forming apparatuses have been progressing and becoming widespread. Toner holds the key to these improvements. In order to satisfy the above-me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08
CPCG03G15/0818
Inventor 水本善久
Owner SUMITOMO RUBBER IND LTD
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