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Colour imaging apparatus

A color imaging and toner technology, which is applied in the field of color imaging devices, can solve problems such as the fluctuation of the peripheral speed difference of the peripheral speed transfer parts, the reduction of image quality, and the increase in device size.

Inactive Publication Date: 2006-08-09
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the drive mechanism becomes very complicated and the size of the device increases
[0014] Also, the announcement does not address fluctuations like the difference between the peripheral speed of the carrying member and the peripheral speed of the transfer member
Therefore, as mentioned above, the transfer state becomes very unstable, and a good-quality image cannot be obtained. Especially as mentioned above, when multi-color toner images overlap each other to form a full-color image, misalignment between colors will occur, thereby Significantly lower image quality

Method used

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  • Colour imaging apparatus
  • Colour imaging apparatus
  • Colour imaging apparatus

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Embodiment Construction

[0065] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0066] exist figure 1 In the illustrated color image forming apparatus, an intermediate transfer belt 30 is wound around a driving roller 10 and a follower roller 20, and circulates in the arrow direction (counterclockwise direction). A plurality (4) of monochrome toner image forming devices 40 (V, C, M, and K) are in contact with the intermediate transfer belt 30 so as to be sequentially transferred thereon by means of individual transfer members 51, 52, 53, and 54. The toner image of the transfer unit determines the corresponding sequential transfer positions T1Y, T1C, T1M and T1K.

[0067] Yellow monochromatic toner image forming device 40(Y), magenta monochromatic toner image forming device 40(M), cyan monochromatic toner image forming device 40(C) and black monochromatic toner image forming device 40(C) Each of the monochromatic toner i...

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Abstract

In a color image forming apparatus, a looped belt member is stretched and circulated by at least a drive roller and a driven roller so as to have a tensed side and a slack side. Each of plural image supporting members supports a single color toner image thereon, and abuts onto the slack side of the belt member to define a transferring position at which the toner image is transferred onto either the belt member or a recording medium held by the belt member, while being rotated. A circumferential velocity of each image supporting member is determined so as to be higher than a circulation velocity of the belt member.

Description

technical field [0001] The present invention relates to a color image forming apparatus applying electrophotography, such as a printing machine, a copying machine, a facsimile machine, and the like. In particular, the present invention relates to a color image forming apparatus in which a plurality of toner images respectively formed by a plurality of monochrome toner image forming devices are sequentially transferred onto a transfer member or transferred to an image formed by a transfer member kept on the recording medium. Background technique [0002] A general imaging device, particularly a tandem imaging device using electrophotography, has a photoresistor as an image bearing member having: a photosensitive layer formed on its outer peripheral surface; a charging device for uniformly charging the outer peripheral surface of the photoresistor ; exposing means for selectively exposing the charged peripheral surface to form an electrostatic latent image thereon; and develo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/01G03G15/16
CPCG03G15/0178G03G2215/0119G03G15/0194
Inventor 依田兼雄阿部信正野村雄二郎
Owner SEIKO EPSON CORP