Photocopying – Contact printing – Light boxes
Patent
1989-08-30
1990-07-24
Braun, Fred L.
Photocopying
Contact printing
Light boxes
355309, 355315, G03G 1514, G03G 2100
Patent
active
049438638
ABSTRACT:
An electrographic printer for printing an image on a continuous printing sheet having a leading edge and a tail edge, the printer including a photosensitive drum, a tractor for feeding the continuous printing sheet to the photosensitive drum, a guide member positioned at an image transfer position and disposed movable toward and away from the photosensitive drum for providing an intimate contact of the printing sheet with the photosensitive drum so as to transfer a toner image on the drum to the printing sheet, a fixing section for fixing a transferred toner image on the printing sheet, a sheet stacker and a feed roller for feeding an image fixed sheet to the sheet stacker, and means for changing a gap between the guide member and the photosensitive drum. The changing means enlarges the gap until the leading edge of the printing sheet passes through the feed roller, and reduces the gap after the leading edge passes through the feed roller. The printer further includes means for changing sheet feeding speed of the feed roller lower than the sheet feeding speed of the tractor after the tail edge of the printing sheet passes through the tractor, whereby a printing to a tail edge portion of the printing sheet is performable.
REFERENCES:
patent: 3988536 (1976-12-01), Kaupp
patent: 4110027 (1978-08-01), Sato et al.
patent: 4131358 (1978-12-01), Windele
patent: 4213551 (1980-07-01), Windele
patent: 4306800 (1981-12-01), Kopp
patent: 4362378 (1982-12-01), Erskine et al.
patent: 4699496 (1987-10-01), John et al.
patent: 4809033 (1989-02-01), Ikemoto et al.
Braun Fred L.
Hitachi Koki Co,. Ltd.
Hoffman Sandra L.
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