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Developing roller, developing device, process cartridge, and image forming apparatus

A developing device and a developing roller technology are applied in the fields of image forming devices, developing rollers and developing devices, which can solve the problems of uneven image density and achieve the effects of good processing performance, avoiding uneven image density and prolonging the suction amount.

Inactive Publication Date: 2012-05-23
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the above reasons, the amount of toner supply on the developing roller is more in the middle part of the length direction than at both ends, causing the problem of uneven image density along the length direction of the developing roller

Method used

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  • Developing roller, developing device, process cartridge, and image forming apparatus
  • Developing roller, developing device, process cartridge, and image forming apparatus
  • Developing roller, developing device, process cartridge, and image forming apparatus

Examples

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Embodiment Construction

[0091] based on the following figure 1 One of the embodiments of the present invention is described through FIG. 8 . figure 1 It is a front view of the image forming apparatus according to one embodiment of the present invention. figure 2 yes figure 1 A cross-sectional view of a developing device related to one embodiment of the present invention among the image forming apparatuses shown. Figure 3 is along the figure 2 Sectional view on line III-III. Figure 4 yes figure 1 A perspective view of the developer sleeve of the developer unit shown. Figure 5 yes Figure 4 So is the plan view of the outer surface of the developing sleeve.

[0092] figure 1 The illustrated image forming apparatus 101 can form yellow (Y), magenta (M), cyan (C), and black (K) color images on recording paper 107 as a transfer material. Hereinafter, Y, M, C, and K are appended to the tails of the device numbers corresponding to the respective colors of yellow, magenta, cyan, and black, re...

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Abstract

The present invention provides a developing roller, a developing device, a process cartridge and an image forming device, which may inhibit the reduction of transmitting amount due to the aging variation, thus avoiding unevenness of image intensity. Specifically, the process cartridge of the image forming device comprises a developing roller with a fixed magnet roller and a developing sleeve (132). The outer surface of the developing sleeve has a plurality of recesses (139) of elliptic shape in plan view regularly or irregularly arranged therein so as not to overlap, and the long axis of the recess is in parallel with the length direction of the developing sleeve (132).

Description

technical field [0001] The present invention relates to a developing roller, a developing device, a process cartridge, and an image forming device used in a copier, a facsimile machine, and a printer, and in particular relates to sending a developer carried on a developing sleeve to a photosensitive drum and a developing sleeve located opposite to each other. The developing area between the drums, the developing roller and the developing device that develop the electrostatic latent image on the photosensitive drum to form a toner image. The present invention also relates to a process cartridge and an image forming apparatus including the above-mentioned developing device. Background technique [0002] In an image forming apparatus, a developer is placed on a developing sleeve of a developing roller. Except for a low-speed machine, in order to reliably send the developer to the photosensitive drum, the outer surface of the developing sleeve is subjected to a process such as P...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/09G03G15/08G03G21/18G03G15/01
Inventor 小岛敏男肥塚恭太铃木励
Owner RICOH KK
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