X-ray or gamma ray systems or devices – Photographic detector support – Serial film or film pack changer
Patent
1991-04-26
1993-11-16
Church, Craig E.
X-ray or gamma ray systems or devices
Photographic detector support
Serial film or film pack changer
378210, G03B 4202
Patent
active
052630773
ABSTRACT:
An x-ray film changer includes a removably mounted, passive-type cassette having no film driving mechanism and comprising a film-receiving spiral guide plate extending within the cassette in excess of one and one-half 360.degree. turns. The cassette further comprises an anvil bar for reverse bending of the guide plate when the cassette is opened, to facilitate film removal, a light-blocking gate which uncovers a film feed-in slot in response to mounting of the cassette on a film exposure device, and a combination carrying handle-latch mechanism. The film changer further includes a tachometer generator-timing circuit delay system for varying the lead time of a firing command to an x-ray generator in response to the speed of an approaching film, a transversely extending, pivotable film stop-and-orienting bar synchronized with film clamping and feed mechanisms, a film anti-bounce mechanism an indicia printing mechanism having a liquid crystal display with a backlighted electroluminescent panel, and film feed sensors for detecting film misfeeds and an unacceptable number of film "short feed" conditions in a film sequence.
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Cowan Kevin P.
Fazi, Jr. Bruno
Havrill Joseph B.
Lewandowski Stanley R.
Reilly David M.
Church Craig E.
Medrad Inc.
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