Image alignment during duplex printing

Electrophotography – Document handling – Original and copy

Patent

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Details

399 13, 399110, G03G 1500

Patent

active

060186402

ABSTRACT:
During first side printing a media sheet is fed along a first media path from feed rollers to metering rollers and into a print zone. After first side printing, the metering roller stops prior to releasing the media sheet into the output tray. The metering roller reverses direction to move the media sheet back along the first media path onto the feed roller, and into the modular duplex handling system. The media sheet is flipped, then fed back for second side printing. Second side printing is performed in either one of book mode or tablet mode. In book mode, the top of the page is the same edge of the media sheet for the first side and the second side. In tablet mode, the media sheet edge at the top of the first side corresponds to the bottom of the second side.

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Hewlett Packard, "LaserJet 4000T Engine with Duplexer Unit," 6 pages; Disclosed Oct. 1997.

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