Image forming apparatus and image forming method

Details Image forming apparatus and image forming method Image forming apparatus and image forming method

1997-02-26

1998-05-19

Moses, R. L.

Electrophotography

Control of electrophotography process

Of plural processes

399 53, G03G 1506, G03G 2100

Patent

active

057549206

ABSTRACT:
The present invention relates to an image forming apparatus for copiers, printers and the like. In the image forming apparatus, a standard pattern image, the density of which is detected by a sensor for controlling conditions of image forming operations, is formed on a photosensitive member. Density values are sampled at a plurality of sampling points on a standard pattern image by operating the sensor with a timing at which said sensor confronts said standard pattern image, and are mutually compared with each other. If the comparison result indicates that the timing of the sampling operation lags the standard pattern image, the sampling timing is corrected by eliminating the timing lag. The sampling operation of a subsequent sampling cycle is thereby conducted based on a corrected timing.

REFERENCES:
patent: 5099279 (1992-03-01), Shimizu
patent: 5266997 (1993-11-01), Nakane et al.
patent: 5579090 (1996-11-01), Sasanuma et al.
patent: 5585927 (1996-12-01), Fukui et al.

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