Film clamp

Details Film clamp Film clamp

1989-11-28

1990-10-23

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Detailed holder for original

G03B 2762, G03B 2764

Patent

active

049656325

ABSTRACT:
A platen 3 has a flat working surface and an aperture 5. A proximal gripping member 11 is sized, shaped, and positioned to extend along the proximal side of the aperture 5 and to grip a proximal edge of a film 1 between the platen 3 and the proximal gripping member 11. A second gripping member 13 is sized, shaped, and positioned to extend along the distal side of the aperture 5 and to grip a distal edge of the film 1 between the platen 3 and the distal gripping member 13. Arms 19 press the proximal gripping member 11 at least generally perpendicularly toward the platen 3 and press the distal gripping member 13 toward the platen 3 and away from the proximal gripping member 11 after the proximal gripping member 11 has gripped the proximal edge of the film 1 in order to pull the film flat and place the film in tension across the aperture.

REFERENCES:
patent: 2824491 (1958-02-01), Hoffmaster
patent: 3132560 (1964-05-01), Pignone et al.
patent: 3944366 (1976-03-01), Robertson
patent: 4444494 (1984-04-01), Koyama et al.
patent: 4483612 (1984-11-01), Binder
patent: 4592652 (1986-06-01), Henmi et al.
patent: 4736228 (1988-04-01), Ito
patent: 4761675 (1988-08-01), Sawasaki

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