Method and a color image forming apparatus forming a positioning

Details Method and a color image forming apparatus forming a positioning Method and a color image forming apparatus forming a positioning

1994-03-29

1996-03-12

Grimley, A. T.

Photocopying

Contact printing

Light boxes

347116, 347248, 355208, 355275, G03G 1501

Patent

active

054990920

ABSTRACT:
In a color image forming apparatus, a latent image forming device selectively forms on a photoconductive element images respectively corresponding to images of particular colors and a position mark latent image representative of position information. A developing unit develops the latent images with developers of respective colors to thereby produce corresponding color images, and develops the position mark latent image to thereby produce a position mark. The color images are transferred to an intermediate transfer belt one above another and then transferred to a recording medium. The position mark is also transferred to the transfer belt to form a position information portion. A position information detecting device generates a detection signal on detecting the position information portion formed on the transfer belt. A starting device starts forming a latent image on the photoconductive element in response to the detection signal. The apparatus is capable of forming a high definition full-color image free from color displacements, and reducing the total printing time.

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Xerox Disclosure Journal, vol. 18, No. 3, May/Jun. 1993, pp. 257-259, Kenneth R. Ossman, "Color Printer Employing Fiducial Mark for Registration Correction".

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