Photocopying – Contact printing – Light boxes
Patent
1992-12-14
1994-04-26
Grimley, A. T.
Photocopying
Contact printing
Light boxes
355274, 355312, G03G 2100
Patent
active
053071310
ABSTRACT:
An apparatus for registering successive toner images to a sheet includes a rotatable photoreceptor drum having a transfer zone on its circumferential surface at which toner images are transferred to the sheet, a generally cylindrical member having a circumferential surface adjacent the photoreceptor drum at the transfer zone, the cylindrical member having a radius which is an integer multiple of the radius of the photoreceptor drum, and a belt for moving the sheet around the circumferential surface of the cylindrical member in a recirculating path. A sensor detects when a lead edge of the sheet is a first predetermined distance from the transfer zone, and a polygon raster output scanner responsive to the sensor forms a latent image on the photoreceptor drum when the sensor detects the lead edge of the sheet, at an imaging point which is a second predetermined distance from the transfer zone, the second predetermined distance not exceeding the first predetermined distance.
REFERENCES:
patent: 4403847 (1983-09-01), Chrestensen
patent: 4724458 (1988-02-01), Roy et al.
patent: 4899196 (1990-02-01), Mahoney
patent: 4914482 (1990-04-01), Ammenheuser et al.
patent: 4949129 (1990-08-01), Fowlkes et al.
patent: 5081506 (1992-01-01), Borostyan
patent: 5134427 (1992-07-01), Akiyama et al.
Beatty Robert
Grimley A. T.
Xerox Corporation
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