Photocopying – Contact printing – Light boxes
Patent
1995-04-03
1996-08-06
Pendegrass, Joan H.
Photocopying
Contact printing
Light boxes
271228, 271242, G03G 1500
Patent
active
055439098
ABSTRACT:
A stalled roll registration method and apparatus used as the sole timing adjustment in a paper path includes a clutch or motor driven registration nip, a buckle chamber and two sensors. After a sheet reaches a sensor upstream of the registration nip, the sheet lead edge advances a fixed distance into the stalled registration nip in order to buckle a known amount. Afterwards, the registration nip advances the deskewed sheet until a second sensor downstream of the registration nip is reached. The registration nip then stops, allowing the sheet to form an upstream buckle. This second buckle can be large since the lead edge is constrained by the registration nip. Therefore, large timing variations between sheet locations and image locations can be accommodated.
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Chen Sophia S.
Henry II William A.
Pendegrass Joan H.
Xerox Corporation
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