Printing assembly for printing on sheets of media from a stack

Details Printing assembly for printing on sheets of media from a stack Printing assembly for printing on sheets of media from a stack

2005-02-01

2005-02-01

Walsh, Donald P. (Department: 3653)

Sheet feeding or delivering

Delivering

By endless conveyor

C271S097000, C271S093000, C271S090000, C271S094000

Reexamination Certificate

active

06848686

ABSTRACT:
A printing assembly for printing on porous sheets of media from a stack of such sheets includes a retaining structure that is configured to retain the stack in an aligned condition. A pick-up device on the retaining structure includes a gas conduit that is in fluid communication with a gas supply and a nozzle arrangement that is in fluid communication with the gas conduit. The nozzle arrangement is shaped to define a pick-up surface. The pick-up device is displaceable along a feed path relative to the retaining structure. The nozzle arrangement is capable of directing a flow of gas onto a first sheet of the stack such that the gas passes partially through the first sheet and impinges on a second sheet, generating a cushion of air between the first and second sheets to separate the first and second sheets. The gas supply is reversible so that the first sheet can be drawn towards the pick-up surface and retained against the pick-up surface. A displacement mechanism displaces the pick-up device along the feed path so that the first sheet is fed from the stack along the feed path. A feed mechanism is positioned downstream of the pick-up device to feed the first sheet along the feed path. A printing station is positioned downstream of the feed mechanism to receive the first sheet and to carry out a printing operation on the first sheet.

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Derwent Abstract Accession No. 92-215190/26, SU 1680606 A (MOSC PRINTING INST) Sep. 30, 1991, Abstract.

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