Adjustment of skew registration of media to a developed...

Details Adjustment of skew registration of media to a developed... Adjustment of skew registration of media to a developed...

2006-08-08

2006-08-08

Chau, Minh (Department: 2854)

Electrophotography

Document handling

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C399S371000, C027S021100, C027S021100

Reexamination Certificate

active

07088948

ABSTRACT:
A printing machine (10) including a registration station (45) for applying a skew adjustment received from a human operator is disclosed. The registration station (45) includes independently controllable motors (52a,52b) that drive corresponding urging rollers (56a,56b) as controlled by control circuitry (24), for example in response to the position of a media sheet as sensed by sensors (58a,58b;60a,60b) at the registration station (45). The machine operator can enter a skew adjustment value at a user interface (25a), or at a networked computer workstation with which the printing machine (10) communicates via a network interface (25b). The control circuitry (24) calculates differential control signals for controlling the motors (52a,52b) to effect the skew correction. The differential control signals may be differential timing delays, such as prior to deactivation of the motors (52a,52b), or may be a differential velocity signal for driving the motors (52a,52b).

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patent: 5322273 (1994-06-01), Rapkin et al.
patent: 5555084 (1996-09-01), Vetromile et al.
patent: 6997455 (2006-02-01), Romine

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