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

A developing device and developer technology, applied in the field of developing rollers, can solve the problem of uneven image density, achieve good processing performance, increase the absorption amount, and ensure the effect of absorption amount

Inactive Publication Date: 2009-03-11
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 dire

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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Example Embodiment

[0091] According to figure 1 To FIG. 8 illustrates one of the embodiments of the present invention. figure 1 It is a front view of an image forming apparatus related 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 in the image forming apparatus shown. image 3 Is along figure 2 Sectional view on line III-III. Figure 4 is figure 1 An oblique view of the developing sleeve of the developing device shown. Figure 5 is a plan view showing the outer surface of the developing sleeve shown in Figure 4 unfolded.

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

[0093] Such as fig...

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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 copiers, facsimile machines, and printers. 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 above-mentioned developing sleeve is subjected to a process such as Patent Document 1 (JP Patent Laid-Open). 2003-255692 ), Patent Document 2 (JP Unexamined No. 2004-191835 ), and Patent Document 3 (JP Unexamined No....

Claims

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Application Information

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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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