B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
271/55
B65H 23/00 (2006.01) B41B 21/32 (2006.01) B65H 20/00 (2006.01) B65H 27/00 (2006.01) G03B 1/32 (2006.01) G03B 1/42 (2006.01)
Patent
CA 1192235
Abstract of the Disclosure A bi-directional film transport device includes an upper and lower plate member having a separation gap between a first and second pair of drive rollers, the bytes of which are positioned adjacent the gap. A single drive motor is rigidly rotationally coupled to drive the first and second pair of drive rollers and the plate members function to eliminate the tendency of the film to buckle which in turn maintains the film in the proper plane of focus. As a result of this simple arrangement, complex clutch mechanisms which are otherwise employed to maintain tension during bi-directional operation have been elimi- nated. Side walls coupled between the plates parallel to the path of film travel prevent skewing of the film driven by the short low inertia high speed drive rollers.
422902
Itek Corporation
Mcfadden Fincham
LandOfFree
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