Registration of paper location for multiple printing

Details Registration of paper location for multiple printing Registration of paper location for multiple printing

1996-09-20

1997-11-18

Bennett, Christopher A.

Typewriting machines

Sheet or web

400703, 400709, 271227, B41J 1326

Patent

active

056880596

ABSTRACT:
A laser printer (3) can initiate a line of printing only when the sweep of the laser light reaches a point in its cycle. An inkjet printer (5) moves paper by stepper motor in increments. Switch (9) senses the paper (15) to determine the location of paper in path (6) with respect to nominal printing locations of the laser printer. The closest nominal position is selected for printing. The paper may lead or lag the selected position. Switch (11) senses the paper to determine the location of paper in the path with respect to nominal printing locations of the inkjet printer. Two leads are added to reach a net greater lead, a lag is subtracted from a lead, and two lags are added to reach a net greater lag. The closest nominal position is then selected. This assures that registration does not vary by more than one half of the spacing between nominal locations of the second printer.

REFERENCES:
patent: 4734868 (1988-03-01), DeLacy
patent: 4898488 (1990-02-01), Yokoi et al.

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