Photocopying – Projection printing and copying cameras – Copying both sides of original
Patent
1977-07-01
1978-11-14
Griffin, Donald A.
Photocopying
Projection printing and copying cameras
Copying both sides of original
355 64, G03B 2732, G03B 2752
Patent
active
041253248
ABSTRACT:
Copying apparatus for copying both sides of a record which is placed for copying between two transparent sheets mounted in the front focal plane of a lens system of the apparatus, the sheets are pivotal about a hinge axis adjacent one side of the sheets, the sheets being rotatable through at least 90.degree. about the hinge axis which is in or to one side of an optical axis of the lens system. To copy the reverse of the record the sheets are turned through 90.degree. and in one embodiment where the hinge axis is in the optical axis a masking means having two apertures one on one side and the other on the other side of the optical axis shifts to record the reverse; in another embodiment where the hinge axis is to one side of the optical axis the hinge axis is shifted from the one side to the other of the optical axis. The sheets can be rotated about an axis in or parallel to the optical axis so that the sheets may be turned about a top or side of the record for "normal" or "tumble" turnings.
REFERENCES:
patent: 2296655 (1942-09-01), Stuart
patent: 2443281 (1948-06-01), Terry
patent: 2682193 (1954-06-01), Schubert et al.
patent: 3442588 (1969-05-01), Squassoni et al.
patent: 3675999 (1972-07-01), Komori et al.
patent: 4035073 (1977-07-01), Del Vecchio
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