Microfilm reader/printer with normally open and removable glass

Details Microfilm reader/printer with normally open and removable glass Microfilm reader/printer with normally open and removable glass

1978-04-26

1980-04-15

Stephan, Steven L.

Optics: image projectors

Transparent plate

Plate part of film gate

353 26R, 353 95, G03B 148

Patent

active

041981375

ABSTRACT:
A pair of glass flats are mounted in a removable carrier frame assembly, which is adapted to be inserted into a microfilm reader/printer. Supports on the carrier frame may be rested upon a front panel of a reader/printer in order to facilitate an alignment and an insertion of the carrier. A solenoid controlled mechanical linkage normally holds the glass flats in an open position except when the film is actually being projected. Then, they close. Signals are sent back to indicate to the reader/printer whether the flats are opened or closed and to control it in response thereto.

REFERENCES:
patent: 2610540 (1952-09-01), Beitz
patent: 3183771 (1965-05-01), Rutkus
patent: 3604793 (1971-09-01), Wangerin et al.
patent: 3784295 (1974-01-01), Okano
patent: 3868180 (1975-02-01), Priest

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