Microfilm camera

Details Microfilm camera Microfilm camera

1991-11-26

1993-04-13

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Image transferred from individual documents to film strip

354109, 355 41, 355 50, 355112, G03B 2732, G03B 2752

Patent

active

052027244

ABSTRACT:
A microfilm camera comprises a camera head and a document support. The camera head includes a film transport mechanism for intermittently feeding a strip of microfilm past an exposure station at which an aperture plate is disposed. The aperture in the aperture plate is adjustable in one of at least two different sizes by means of a masking flap supported for movement between a first size position, in which a portion of the aperture is shielded, and a second size position in which the masking flap is clear from the aperture. When a document of a relatively small size is placed on the document support, the masking flap is in the first size position, but when a document of a relatively large size is placed on the document support, the masking flap is in the second size position. The camera head also includes a shutter for selectively intercepting and opening an optical path extending through a lens assembly in alignment with the aperture along which imagewise rays of light carrying an image of the document travel towards the microfilm. The microfilm camera also comprises a marking imprint mechanism so designed that, in the case of the microfilmed image of the document of the first size, a single marking is imprinted on the microfilm, but in the case of the microfilmed image of the document of the second size, spaced-apart markings are imprinted on the microfilm.

REFERENCES:
patent: 4693591 (1987-09-01), Saijo et al.
patent: 4777515 (1988-10-01), Aikoh et al.
patent: 4803505 (1989-02-01), Saijo et al.
patent: 4967228 (1990-10-01), Ishii et al.

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