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Image forming apparatus, process cartridge used therein, and production method of charging roller

A manufacturing method and a charging roller technology, which are applied to the equipment of the electric recording process applying the charge pattern, the electric recording process applying the electric charge pattern, the corona discharge device, etc., can solve the problem of obvious image defects, poor controllability of the photoreceptor, etc. question

Inactive Publication Date: 2007-10-31
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, when only a constant DC voltage is applied to the charging roller, the controllability of the charging potential of the photoreceptor becomes poorer than when an AC voltage is superimposed, and image defects caused by slippage become conspicuous.

Method used

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  • Image forming apparatus, process cartridge used therein, and production method of charging roller
  • Image forming apparatus, process cartridge used therein, and production method of charging roller
  • Image forming apparatus, process cartridge used therein, and production method of charging roller

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Embodiment Construction

[0032] An embodiment of the present invention will be described below with reference to FIGS. 1 to 6 .

[0033] First, the configuration of main components of the image forming apparatus 10 according to the present embodiment will be described with reference to FIG. 2 . FIG. 2 is a longitudinal sectional view of the image forming apparatus 10 viewed from the front side.

[0034] As shown in FIG. 2 , the image forming apparatus 10 forms an image corresponding to image data on paper by electrophotography. The image forming apparatus 10 has a photoreceptor (image carrier) 1 surrounded by a charging roller 2 , an exposure unit 3 , a developing unit 4 , a transfer unit 5 , and a fixing unit in a structure for performing a well-known Carlson process. 6. And cleaning unit 7.

[0035] The photoreceptor 1 has a drum shape and is rotatably supported by an unillustrated frame. In the photoreceptor 1 , a photosensitive layer made of OPC (Organic Photoconductor) or the like is formed on...

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Abstract

An image forming apparatus in which a charging roller charges an image carrier to which a lubricant is applied prevents slip of the charging roller. The charging roller has a rubber layer mainly made of an epichlorohydrin rubber formed around the metal core. A surface of this rubber layer is hardened with a surface treating solution containing an isocyanate compound. The surface of this rubber layer is also subjected to three abrading processes including two,stone grinding processes and one lapping process so that a ten-point height of irregularities Rz thereof becomes 11 mum or more.

Description

technical field [0001] The present invention relates to a charging roller that comes into contact with an image carrier on which an electrostatic latent image is formed to charge the image carrier in an electrophotographic image forming apparatus. Background technique [0002] In electrophotographic image formation, an electrostatic latent image corresponding to an image is formed on the surface of a photoreceptor. In this case, before the electrostatic latent image is formed, it is necessary to perform a charging treatment for uniformly charging the surface of the photoreceptor. Among them, the charging method of the photoreceptor includes two types: a non-contact charging method and a contact charging method. [0003] In the non-contact charging method, a so-called non-grid charger or a grid charger is used, and the charge is supplied to the photoreceptor through air as a medium by corona discharge caused by the charger. In this non-contact charging method, since the cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/02G03G21/18G03G15/00
CPCG03G15/0233
Inventor 香川敏章新川幸治佐桑徹
Owner SHARP KK