Development roller, development device, image forming apparatus, and method of manufacturing development roller

A manufacturing method and a technology of a developing device, which are applied in the direction of the electric recording process using the charge pattern, the equipment of the electric recording process using the charge pattern, and liquid chemical plating, can solve the problems such as difficult to maintain image density and difficult to develop, and achieve Effects of suppression of toner coverage, good development, and suppression of decline in toner chargeability

Inactive Publication Date: 2011-06-08
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the amount of toner conveyed by the developing roller decreases, making it difficult to maintain the density of the image, and there is a problem that it is difficult to perform good development over a long period of time.

Method used

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  • Development roller, development device, image forming apparatus, and method of manufacturing development roller
  • Development roller, development device, image forming apparatus, and method of manufacturing development roller
  • Development roller, development device, image forming apparatus, and method of manufacturing development roller

Examples

Experimental program
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Effect test

Embodiment 1

[0054] Such as image 3 As shown in (a), on the outer peripheral surface of the developing roller 25 , similar to the developing roller described in the above-mentioned Patent Document 1, a mesh-like concave-convex pattern is formed. In the developing roller 25 of this example, grooves 29 are formed over the entire periphery at predetermined positions in the axial direction on the outer peripheral surface as the concave-convex pattern. At this time, the groove 29 is formed in a helical shape successively inclined at a predetermined angle (in the illustrated example, 45°, but not limited thereto) with respect to the axial direction of the developing roller 25 and has a predetermined number of regularities. One slanted groove 29a and a predetermined number of second slanted grooves 29b are formed successively in a helical shape inclined oppositely to the inclination of the first slanted grooves 29a. These first and second inclined grooves 29a, 29b are formed at intervals p at a...

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Abstract

The invention provided a development roller development device, image forming apparatus, and method of manufacturing development roller can realize well development for a long time by inhibiting reduce of the depth of the convex-concave part after forming images for a long time. The development roller at least comprises a base unit (25a) a base recess (29a',29b') and a base projection (30') that are formed in a predetermined area of a circumference surface of the base unit; and a surface layer (25b) formed on the circumference surface of the base unit (25a) and having a recess (29a,29b) and aprojection (30). The surface hardness of the projection (30) is larger that the surface hardness of the recess (29a,29b).

Description

technical field [0001] The present invention relates to the technical field of a developing roller having concavo-convex portions on its outer peripheral surface to convey toner to a latent image carrier, a developing device having the developing roller, an image forming device having the developing device, and a manufacturing method of the developing roller. Background technique [0002] Conventionally, in a developing device for developing an electrostatic latent image with toner of a non-magnetic component, the toner is charged by triboelectric charging on a developing roller. As such a developing roller, a developing roller having concavo-convex portions on the outer peripheral surface and a flat or substantially flat surface of the convex portions is known (for example, refer to Patent Document 1). In this concave-convex portion, the toner is effectively frictionally charged on the developing roller. Such as Figure 10 As shown in (a), the developing roller a is compos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/08G03G15/00C23C18/00
Inventor 山田阳一前田将宏铃木淳一福元贵智
Owner SEIKO EPSON CORP
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