Synchronizing electrostatic copy formation

Details Synchronizing electrostatic copy formation Synchronizing electrostatic copy formation

1986-05-19

1987-12-08

Grimley, Arthur T.

Photocopying

Including fiber optics

355 8, 355 14SH, 355 14R, G03G 1500

Patent

active

047115521

ABSTRACT:
In an electrophotographic copier, adjustments are made to synchronize copy sheet gating optics start of scan, and document conveyor registration. The adjustment to the copy sheet gating is effected by making a copy with the optics assembly inactivated, determining the length of undeveloped area adjacent to the leading or trailing edge of the copy, and adjusting the start of scan as a function of the determined length. The start of scan of the optics assembly is effected by positioning a test master document with dark portions adjacent to its leading and trailing edges, making a copy of the test master document, determining the length of undeveloped area adjacent to the leading or trailing edge of the copy, and adjusting the start of scan as a function of the determined length. The adjustment of the document conveyor registration is effected by feeding the test master document to the document glass, making a copy of the test master document, determining the length of undeveloped area adjacent to the leading or trailing edge of the copy, and adjusting the document conveyor as a function of the determined length. The determining steps may be done by visual inspection or by an optical sensor. The adjusting may be done manually, either electronically or mechanically. In the alternative, the adjusting may be done automatically in response to the optical sensor.

REFERENCES:
patent: 4026647 (1977-05-01), Kanno et al.
patent: 4203663 (1980-05-01), Ogura et al.
patent: 4422751 (1983-12-01), Komiya et al.
patent: 4536079 (1985-08-01), Lippolis et al.
patent: 4538905 (1985-09-01), Griego et al.
patent: 4627721 (1986-12-01), Nguyen et al.

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