Film conveying apparatus

Details Film conveying apparatus Film conveying apparatus

1987-05-13

1989-04-04

Werner, David

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

242195, 226186, B65H 1600, G11B 1518

Patent

active

048178861

ABSTRACT:
A film conveying apparatus has a first conveying device for contacting the peripheral surface of a roll film such as a rolled microfilm and rotating the roll film in a direction to advance the leading end edge of the film, and a second conveying device adapted to be urged against the surface of the film led out from the roll film and frictionally drive the film. The film conveying apparatus further has a device for temporarily releasing the pressure contact force of the second conveying device to the surface of the film to prevent oblique movement of the film. The first conveying device has a device for transmitting only the rotation in one direction to a drive shaft so as not to impart a friction load to the microfilm. Further, the first conveying device has its portion of contact with the film protruded to ensure the leading-out of the film.

REFERENCES:
patent: 3613977 (1971-10-01), Egan
patent: 3801040 (1974-04-01), Yamanaka et al.
patent: 3877627 (1975-04-01), Boase et al.
patent: 4072279 (1978-02-01), Lewis
patent: 4432509 (1984-02-01), Shirai

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