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Color image forming apparatus

A technology of color imaging and toner, which is applied in the field of color imaging devices, can solve the problems of dislocation of panchromatic images, complex drive structure, and increase in device size, and achieve the effects of no color displacement, simplified mechanical structure, and reduced size

Inactive Publication Date: 2006-05-03
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] exist Image 6 In the related art device shown, since the driving unit of the image bearing member and the driving unit of the transfer member are driven by separate driving sources, the speed V(Y, M, C and K) is greater than the speed V1 of the transfer member (intermediate transfer drum 12), so the drive structure becomes very complicated and the size of the device increases
[0017] Japanese patent NO 22686267 discloses an image forming device, which has a transmission mechanism that transmits the driving force from the image bearing member to the transfer roller, so that the peripheral speed of the transfer roller is greater than that of the image bearing member. This patent talks about forming A device for forming a monochrome image, but does not consider the problem of color misalignment for forming a full-color image

Method used

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  • Color image forming apparatus
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Embodiment Construction

[0070] A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

[0071] Such as figure 1 As shown, in the color image forming apparatus, the intermediate transfer belt 30 is wound around the drive roller 10 and the follower roller 20, and circulates in the arrow direction (counterclockwise direction). Many (four) monochromatic toner image forming devices 40 (Y, C, M, and K) can be in contact with the intermediate transfer belt 30, so that the color toner images formed by the many monochromatic toner image forming devices 40 can be sequentially Transferred onto the intermediate transfer belt 30 using separate transfer members 51 , 52 , 53 and 54 . The transfer points (primary transfer points) are represented by T1Y, T1C, T1M, and T1K.

[0072] 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 blac...

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PUM

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Abstract

A color imaging device, comprising: a transfer member; a plurality of image bearing members, carrying a monochromatic toner image on each image bearing member, and pressing against the transfer member, thereby defining a transfer position, In the transfer position, the toner image is either transferred to the rotating transfer member or to the recording medium held by the rotating transfer member; the first transmission mechanism rotates the image bearing member; the second The second transmission mechanism rotates the transfer member and is independently connected to the first transmission mechanism at the same time; the single driving source drives the first transmission mechanism and thus drives the second transmission mechanism; wherein, the peripheral speed of each image bearing member is determined to be less than the rotation speed Cycle speed of printed parts.

Description

[0001] This application is a divisional application with application number 02107016.4 on March 8, 2002 and titled "Color Imaging Device". technical field [0002] The present invention relates to a color image forming apparatus, such as a color printing machine, a color copying machine, or a color facsimile machine, which forms a color image by electrophotography. In particular, the present invention relates to a color image forming apparatus in which a plurality of toner images respectively formed of a plurality of single-color toner images are sequentially transferred to a transfer member or to a toner image held by a transfer member. on the recording medium. Background technique [0003] An image forming device, particularly a tandem image forming device using electrophotography, generally has a photoresistor serving as an image bearing member having: a photosensitive layer on its peripheral surface; Charging means; exposing means for selectively making the peripheral s...

Claims

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Application Information

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IPC IPC(8): G03G15/01G03G15/16G03G15/00G03G21/00
Inventor 依田兼雄阿部信正野村雄二郎
Owner SEIKO EPSON CORP