Photocopying – Contact printing – Light boxes
Patent
1989-03-09
1991-04-30
Braun, Fred L.
Photocopying
Contact printing
Light boxes
355309, G03G 2100
Patent
active
050122967
ABSTRACT:
The invention described is a method of and machine for duplex copying images present in order on both sides of two original sheets in which, in a first cycle, an image of the first original page is applied twice and then an image of the third original page is applied twice to a separate blank receiving sheets.
Thereafter, in a second cycle, an image of the second original page is applied twice and then an image of the fourth original page is applied twice on the blank side of the returned receiving sheets which were already printed on one side. The two cycles are repeated for making further copies of the two original sheets printed on both sides.
REFERENCES:
patent: 4209249 (1980-06-01), Clark et al.
patent: 4453819 (1984-06-01), Wada et al.
patent: 4468114 (1984-08-01), Pels et al.
patent: 4639126 (1987-01-01), Bushaw et al.
patent: 4782363 (1988-11-01), Britt et al.
Dinnissen Johannes H. T.
Lambregts Augustinus W. M.
Braun Fred L.
Oce'-Nederland, B.V.
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