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Charge roller, method for producing the same, and image-forming apparatus including the same

A manufacturing method and a charging roller technology, which are applied to corona discharge devices, equipment for an electrical recording process using a charge pattern, an electrical recording process applying a charge pattern, etc., can solve the problems that the photosensitive drum f cannot be charged well, and the like, Achieving the effect of simple charging interval, preventing peeling, and preventing abnormal discharge

Inactive Publication Date: 2007-05-30
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, if the film on the photosensitive drum f decreases, the charging interval G cannot be kept below a certain interval, and the charging of the photosensitive drum f cannot be performed satisfactorily.

Method used

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  • Charge roller, method for producing the same, and image-forming apparatus including the same
  • Charge roller, method for producing the same, and image-forming apparatus including the same
  • Charge roller, method for producing the same, and image-forming apparatus including the same

Examples

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Embodiment Construction

[0053] Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

[0054] 1 is a schematic diagram partially showing an example of an embodiment of an image forming apparatus according to the present invention, and FIG. 2 is a schematic diagram showing a photoreceptor and a charging device of the example shown in FIG. 1 . In addition, in the following description of each example of the embodiment of the present invention, the same reference numerals are used for the same components as those of the previous example, and detailed description thereof will be omitted.

[0055] As shown in FIGS. 1 and 2 , an image forming apparatus 1 of this example includes a photoreceptor 2 as an image carrier on which an electrostatic latent image and a toner image (developer image) are formed, and Around, from the upstream side of the rotation direction of the photoreceptor 2 (clockwise in FIG. 1 ), sequentially include: a charging devic...

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Abstract

A charge roller includes a core, a resistive layer disposed on a circumferential surface of the core to charge an image-bearing member without contact, and gap members formed of tape-shaped films. These films are fixed to both ends of the charge roller by winding each of the films in a direction opposite a rotational direction of the charge roller in use and perpendicular to the axial direction thereof to form n layers (wherein n>=2) extending in the axial direction at every position in the circumferential direction of the charge roller. The gap members are pressed against a circumferential surface of an image-bearing member to define a charge gap between the image-bearing member and the charge roller.

Description

technical field [0001] The present invention relates to a charging roller for non-contact charging of an image carrier by setting a predetermined charging interval with respect to an image carrier by using a spacer member composed of a belt-shaped film member wound and fixed at both ends, and the manufacture of the charging roller. The technical field of a method and an image forming apparatus including an electrophotographic apparatus such as an electrostatic copier, a printer, and a facsimile machine having the charging roller. Background technique [0002] Conventionally, as an image forming apparatus, an image forming apparatus including a charging roller for contactlessly charging an image carrier by providing a predetermined charging interval is known (for example, refer to Patent Document 1, etc.). As shown in FIG. 14( a ), in the charging roller a used in the image forming apparatus disclosed in Patent Document 1, a resistive layer c made of a conductive elastic memb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/02G03G21/00F16C13/00
CPCG03G2215/02G03G15/025
Inventor 鸭志田伸一大野克德水谷忠弘大桥一顺小桥胜井熊健
Owner SEIKO EPSON CORP
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