Sheet transport for high productivity trayless duplex

Details Sheet transport for high productivity trayless duplex Sheet transport for high productivity trayless duplex

1994-11-18

1995-11-14

Moses, R. L.

Photocopying

Contact printing

Light boxes

355 24, 271182, G03G 2100

Patent

active

054671825

ABSTRACT:
A duplex path loop having a acceleration nip cooperating with a belt transport and retime nip to allow duplexing of sheets while minimizing skipped pitches on the photoreceptor. As each sheet to be duplex printed is removed from the process path after first side imaging it is accelerated to create a gap between it and subsequent sheets. The sheet is then stalled or slowed in a retime nip, while subsequent sheets to be duplexed are simultaneously driven by the same transport, the first mentioned sheet being reinserted into the process path at the proper time for receiving the second side image before the arrival of the second sheet at the retime nip. Subsequent duplex sheets are handled in the same manner so that duplex copies are interleaved or otherwise reinserted into the process path with first side copies so that skipped pitches on the photoreceptor are minimized.

REFERENCES:
patent: 4459013 (1984-07-01), Hamlin et al.
patent: 4519700 (1985-05-01), Barker et al.
patent: 4660963 (1987-04-01), Stemmle
patent: 4918490 (1989-07-01), Stemmle
patent: 5095342 (1992-03-01), Farrell et al.
patent: 5159395 (1992-10-01), Farrell et al.
patent: 5184185 (1993-02-01), Rasmussen et al.
patent: 5327206 (1994-07-01), Ueda et al.
patent: 5337135 (1994-08-01), Malachowski et al.

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