Automatic masking device including an aperture extension means

Details Automatic masking device including an aperture extension means Automatic masking device including an aperture extension means

1980-03-07

1982-04-20

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Detailed holder for photosensitive paper

354247, 355126, G03B 2758

Patent

active

043256309

ABSTRACT:
An automatic masking device including an aperture extension means for use in a printer, wherein a reproduction picture to be projected onto a photosensitive film sheet mounted on a holder is masked by masking plates which are arranged in front of the holder, and are adapted to be movable over the surface of the holder so as to open and close an aperture between the masking plates, and which are adapted to be settled to form the aperture of the predetermined size, and wherein the aperture extension means is capable of extending the aperture beyond the predetermined size and of returning it to the predetermined size.

REFERENCES:
patent: 3737227 (1973-06-01), Harter et al.

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