Film changer

Details Film changer Film changer

1985-11-15

1990-01-09

Church, Craig E.

X-ray or gamma ray systems or devices

Photographic detector support

Serial film or film pack changer

378165, 378166, G03B 4202

Patent

active

048933228

ABSTRACT:
Disclosed is a film feeding mechanism for use during medical x-ray techniques, particularly angiography. Sheets of film are fed sequentially at high speed into and out of a film exposure device, by a feed mechanism including continuously driven feed wheels and movable pinch rollers, in a manner so as to reduce damage to the films, including the build-up and discharge of static charge on the films. In the film exposure device, a free-floating lower clamping assembly, having a natural substantially flat configuration, clamps each film against an upper clamping assembly from the center of the film progressively outward towards its leading and trailing ends, to eliminate wrinkling of the film. A firing command is transmitted to an X-ray generator before each unexposed sheet of film reaches the exposure position and each cycle of operation is accomplished by energizing a single revolution clutch connectable to a continuously running, constant speed motor.

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