Photocopying – Including fiber optics
Patent
1978-07-03
1980-07-29
Braun, Fred L.
Photocopying
Including fiber optics
271184, 271196, 271DIG9, 355 24, G03G 1500
Patent
active
042148316
ABSTRACT:
Apparatus for producing copies having images on both sides thereof. The apparatus includes a movable image transfer member, and image forming station for producing first and second unfixed transferable images on the image transfer member and first and second image transfer stations for transferring the images from the image transfer member to a copy sheet. Located between the first and second image transfer stations are a plurality of vacuum rollers including at least a first roller located adjacent to the image transfer member and a guide member associated with the vacuum rollers, the vacuum rollers and guide member forming a copy sheet inversion path. The vacuum rollers are operable in synchronism with the movable image transfer member and are rotatable in a first direction for attracting by vacuum a copy sheet separating from transfer relationship with the transfer member and to one side of which copy sheet the first transferable image has been transferred, and for moving the copy sheet over the guide member along the inversion path away from the transfer member. The vacuum rollers are then rotatable in a second opposite direction after the copy sheet has been separated from the transfer member so as to invert the copy sheet while the first image is unfixed to move the copy sheet over the guide member along the sheet inversion path toward the transfer member to register the second side of the copy sheet with the second image on the transfer member at the image transfer station.
REFERENCES:
patent: 3687539 (1972-08-01), Furuichi
patent: 3883911 (1974-09-01), Caldwell et al.
patent: 3941374 (1976-03-01), Vits
patent: 3997263 (1976-12-01), Stemmle
patent: 4019731 (1977-04-01), Vits
patent: 4095979 (1978-06-01), DiFrancesco et al.
Braun Fred L.
Eastman Kodak Company
Noval William F.
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