Image sampling and color shift correction system in multiple ima

Details Image sampling and color shift correction system in multiple ima Image sampling and color shift correction system in multiple ima

1995-04-17

1996-12-24

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

355327, 347116, 358526, G03G 1501

Patent

active

055877710

ABSTRACT:
An image sampling and color shift correction system in a multiple image forming apparatus forms a multiple image by providing a plurality of image output units along a transfer belt. An image control unit applies image data to the image output units. A pattern generator repeatedly generates a register shift measurement pattern in the main scanning direction and the sub-scanning direction of the respective image output units. The register shift measurement pattern is formed outside of the largest paper area. A sampling unit samples an image formed by the respective image output units at both sides of a paper on the transfer belt in the main scanning direction of the transfer belt. A processing unit takes data sampled by the sampling unit and processes the amount of register shift. A control unit controls the image output and image sampling correction.

REFERENCES:
patent: 5160946 (1992-11-01), Hwang
patent: 5241400 (1993-08-01), Itagaki
patent: 5373355 (1994-12-01), Ando et al.
patent: 5404202 (1995-04-01), Abramsohn

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