Full format variable width film hold-down device

Details Full format variable width film hold-down device Full format variable width film hold-down device

1988-03-21

1989-11-21

Ramirez, Ramon O.

Supports

Props and braces

Vacuum hold-down

269 21, 355 73, G03B 2760

Patent

active

048817112

ABSTRACT:
A variable width transparent photographic film vacuum hold-down device. Two spaced parallel vacuum slits formed on a flat platen are connected by the longitudinal edges of the film, and when covered by a flexible cover sheet form two vacuum channels holding the film flat and unobscured to the extreme edges. Any film width not exceeding the length of the vacuum slits is held without any modification or adjustment to the device. Any length of film can be used.

REFERENCES:
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patent: 3115808 (1963-12-01), Durst
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patent: 3584954 (1971-06-01), Nast
patent: 3588079 (1971-06-01), Addy
patent: 3645621 (1972-02-01), Wally
patent: 4197005 (1980-04-01), Sippel
patent: 4324487 (1982-04-01), Nishihama
patent: 4378155 (1983-03-01), Nygaard
patent: 4526445 (1985-07-01), Wogoman

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