Portable dual spool microfilm reading device

Details Portable dual spool microfilm reading device Portable dual spool microfilm reading device

1975-07-18

1977-07-12

Pitrelli, John F.

Card, picture, or sign exhibiting

Check, label, or tag

Baggage checks

401061, G09F 1124

Patent

active

040345408

ABSTRACT:
A portable dual spool cassette type microfilm reading device capable of storing a large quantity of microphotographic information in a relatively small space. The cassette contains a band of microfilm having information frames disposed in rows and columns thereon and windable from one spool to the other in the cassette. The cassette has a track which extends in the column direction of the microfilm and on which a direct view type microfilm viewer is mounted for movement. To access a column for a particular frame a manually operable knob is operated to wind the film on the spools to the column position and to locate the row the viewer is moved in the track to the row position.

REFERENCES:
patent: 2787070 (1957-04-01), Idoine
patent: 3229396 (1966-01-01), Shaw
patent: 3557476 (1971-01-01), Kalb

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