Film changer

Details Film changer Film changer

1990-01-08

1991-08-20

Church, Craig E.

X-ray or gamma ray systems or devices

Photographic detector support

Serial film or film pack changer

378182, G03B 4202

Patent

active

050420569

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 from a film magazine into a film exposure device, and then into a film receiving cassette, 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 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. The upper clamping assembly is of thin construction so as to enable the locating of an object being x-rayed closely adjacent the x-ray film, to produce x-rays of exceptionally high resolution. Feed-in wheels and pinch rollers drivingly engage one of the exposed films after an exposure operation prior to the film being engaged by feed-out wheels and pinch rollers, so as to buckle or peel the exposed film away from the upper clamping assembly and thereby precluding sticking of the film to the assembly. An optical type indicia forming device, including an electronic display, produces readily readable white indicia on the films on a dark background. A film-receiving cassette, including a spirally arranged inner guide plate, receives and stores exposed films in a relatively small space for subsequent developing.

REFERENCES:
patent: 2622206 (1952-12-01), Passannante
patent: 3440422 (1969-04-01), Ball et al.
patent: 3672279 (1972-06-01), Hackenberg et al.
patent: 3724352 (1973-04-01), Shimomura
patent: 3807726 (1974-04-01), Hope et al.
patent: 3862426 (1975-01-01), Thomas
patent: 3908984 (1975-09-01), Sohngen
patent: 3967126 (1976-06-01), Otto, Jr.
patent: 4017877 (1977-04-01), Powers
patent: 4300757 (1981-11-01), Koiso et al.
patent: 4342510 (1982-08-01), Guillaume
patent: 4355791 (1982-10-01), Villa
patent: 4417356 (1983-11-01), Hoffman
patent: 4418420 (1983-11-01), Bauer et al.
patent: 4428658 (1984-01-01), Moore et al.
patent: 4447053 (1984-05-01), Wager et al.
patent: 4566785 (1986-10-01), Takenouchi
patent: 4697902 (1987-10-01), Maehara et al.
patent: 4712227 (1987-12-01), Warden
patent: 4782504 (1988-11-01), Weber et al.
patent: 4893322 (1990-01-01), Hellmick et al.
patent: 4924486 (1990-05-01), Weber et al.

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