Recirculating duplex documents copier

Details Recirculating duplex documents copier Recirculating duplex documents copier

1979-08-31

1981-07-14

Griffin, Donald A.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 23, G03B 1500, G03B 2732

Patent

active

042783445

ABSTRACT:
A system of pre-collation copying a set of duplex document sheets by inhibiting the operation of a document inverting path during successions of contiguous plural document copying circulations to copy only one side of the documents during each succession, and actuating the document inverter path only during single document circulations at the end of a succession, after the document set has been circulated a number of times in that succession equal to the quotient of a constant number divided by the number of document sheets in the document set. Opposite sides of the documents are copied in alternate successions, and all the copies made during every other succession of plural recirculations are temporarily stored in a buffer set of a pre-determined maximum desired copy sheet capacity. The constant number corresponds to this copy sheet capacity.

REFERENCES:
patent: 4050805 (1977-09-01), Hage
patent: 4067649 (1978-01-01), Hubbard et al.
patent: 4080060 (1978-03-01), Nothmann
patent: 4099150 (1978-07-01), Lyman
patent: 4140387 (1979-02-01), Gustafson
patent: 4158500 (1979-06-01), DiFrancesco et al.
patent: 4166614 (1979-09-01), Hamlin et al.

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