Color image forming apparatus
A color imaging and toner technology, applied in the field of color imaging devices, can solve the problems of not considering the color dislocation of the full color image, the complex driving structure, the increase in the size of the device, etc., and achieve the effects of no color dislocation, simplified mechanical structure, and reduced size.
Inactive Publication Date: 2008-11-26
SEIKO EPSON CORP
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[0016] In the related art device shown in FIG. 6, 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) of the image bearing member (photoresistor drum 11) , C and K) are 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
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[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 black...
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A color image forming apparatus comprises: a transferring member; a plurality of image supporting members, each supporting a single color toner image thereon, and abutting onto the transferring member to define a transferring position at which the toner image is transferred onto either the transferring member or a recording medium held by the transferring member, while being rotated; a first gearing, which rotates the image supporting members; a second gearing, which rotates the transferring member, while being connected to the first gearing separately; and a single drive source, which drives the first gearing to thereby drive the second gearing, wherein a circumferential velocity of each image supporting member is determined so as to be lower than a circulation velocity of the transferring member.
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...
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IPC IPC(8): G03G15/16G03G15/01G03G15/00G03G21/00
Inventor 依田兼雄阿部信正野村雄二郎
Owner SEIKO EPSON CORP