Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1978-05-05
1980-06-24
Moses, R. L.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
271 9, 355 23, G03G 1500
Patent
active
042092493
ABSTRACT:
A method and apparatus is disclosed for generating duplex copies from simplex originals. A plurality of originals are sequentially fed through the copying area of an electrophotographic copying machine during a first pass with a predetermined number of copies being electrophotographically made only with respect to each original appearing at an even number in the sequence as fed to the copying area and with the copies being made on one side of separate sheets of copy paper withdrawn from a storage receptacle. After collection of the sheets of copy paper from the copying area, these sheets are replaced in the storage receptacle and the plurality of originals again sequentially fed through the copying area of the copying machine during a second pass. During this second pass through the copying area, a predetermined number of electrophotographic copies equal to the number made during the first pass are made with respect to each original appearing at an odd number in the sequence as fed to the copying area with the copies being made on the side of the sheets opposite to that used during first pass copying, these sheets having been previously replaced in the storage receptacle and withdrawn therefrom for a second time during copying. Through proper orientation of the sheets replaced in the storage receptacle, duplex copies are therefore made from adjacent originals in the sequence of originals as fed to the copying area during each pass.
REFERENCES:
patent: 4067649 (1978-01-01), Hubbard
patent: 4099150 (1978-07-01), Connin
patent: 4116558 (1978-09-01), Adamek et al.
Research Disclosure, "Apparatus for Producing Collated Copies From Two Sided Originals", pp. 77-79, May 1977.
Clark Gary A.
Queener Carl A.
International Business Machines - Corporation
Moses R. L.
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