Slow scan registration self alignment system for raster input sc

Details Slow scan registration self alignment system for raster input sc Slow scan registration self alignment system for raster input sc

1988-05-04

1989-09-05

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Picture signal generator

250578, 358447, 358486, 358494, H04N 104, H04N 112

Patent

active

048644153

ABSTRACT:
A system for self-aligning a raster input scanner in the slow scan direction where, at start of scan, a target having a variable density image is scanned first until a preset target image line is obtained and the position of the scan carriage registered; then from the registered position, the platen is scanned through a predetermined number of scan lines; following this, the carriage is reversed and returned the same number of scan lines where the target is again scanned and the target image line obtained compared with the previous target image line to determined if a valid scan cycle has taken place.

REFERENCES:
patent: 3658430 (1972-04-01), Rashkin
patent: 4370059 (1983-01-01), Masuda
patent: 4518999 (1985-05-01), Kurata et al.
patent: 4538185 (1985-08-01), Wiggins
patent: 4724330 (1988-02-01), Tuhro
patent: 4748514 (1988-05-01), Bell
patent: 4749872 (1988-06-01), Asada et al.

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