Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Patent
1997-12-02
1999-11-30
Coles, Edward L.
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
395109, 395104, 395101, 395105, 395111, 347116, 347117, 347138, 347154, 347234, 347118, 347119, B41B 1500, B41J 2385
Patent
active
059957174
ABSTRACT:
A color copy machine is equipped with four image forming sections for forming images of different color components based on image data items relating to separated color components. A conveyance belt is provided below each image forming section. To avoid forming of a displaced image on a recording paper sheet P conveyed by the conveyance belt, pattern data for prevention of a displaced image is synthesized with image data. Each image forming section forms color patterns on predetermined portions of the conveyance belt on the basis of the synthesized data. The main-scanning directional displacement of each color pattern can be detected by comparing the numbers of those sensed line segments of the patterns which are sensed by a sensor. Then, the image forming positions are adjusted so that the numbers of the sensed line segments will be equal to each other. Thus, the cost-effective structure enables reliable adjustment of the image forming positions for images of different color components, and hence forming of a high-quality image in which different color components desirably overlap.
REFERENCES:
patent: 4916547 (1990-04-01), Katsumata et al.
patent: 5384592 (1995-01-01), Wong
patent: 5523823 (1996-06-01), Ashikaga
Coles Edward L.
Kabushiki Kaisha Toshiba
Lamb Twyler
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