Control for xerographic system

Details Control for xerographic system Control for xerographic system

1980-09-02

1982-09-07

Moses, Richard L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 14D, G03G 1500

Patent

active

043481000

ABSTRACT:
A combination xerographic/flying spot scanning apparatus wherein xerographic images produced by the xerographic section are scanned following development by the scanning beam of the scanning section to produce image signals or pixels representative of the image scanned. To accommodate changes in the apparatus due to use and wear on the components, a test image is produced in the interdocument area, and following development, scanned by the scanning beam. The signals produced from the test image are utilized to update the threshold level at which image signals produced by the apparatus scanning section are processed.

REFERENCES:
patent: 3659556 (1972-05-01), Mutschler
patent: 4026643 (1977-05-01), Bergman
patent: 4046471 (1977-09-01), Branham et al.
patent: 4082445 (1978-04-01), Steiner
patent: 4215930 (1980-08-01), Miyakawa et al.
patent: 4272182 (1981-06-01), Abe et al.

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