Correction of misregistration in an image forming apparatus depe

Details Correction of misregistration in an image forming apparatus depe Correction of misregistration in an image forming apparatus depe

1995-10-10

1997-02-04

Dang, Thu A.

Electrophotography

Diagnostics

Document handling

399 51, 399300, G03G 1501

Patent

active

056004044

ABSTRACT:
Specific pattern images are transferred from respective photoreceptors onto the circumferential surface of a transfer belt. By detecting the specific pattern images with sensors, misregistration amounts on a transfer belt are calculated by a misregistration correction control section. Averages of the misregistration amounts for respective colors are calculated for each region that corresponds to a single recording medium placed on the transfer belt. The scanning timings of image writing units are controlled by an image signal output control section based on the calculated averages. As a result, toner images formed on the respective photoreceptors are transferred to proper positions of any recording medium being placed on the transfer belt.

REFERENCES:
patent: 4916547 (1990-04-01), Katsumata et al.
patent: 4937664 (1990-06-01), Chiku et al.
patent: 5160946 (1992-11-01), Hwang
patent: 5412577 (1995-05-01), Sainio et al.
patent: 5452073 (1995-09-01), Kataoka

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