The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 1991
Filed:
Nov. 15, 1988
Kevin P Cowan, Allison Park, PA (US);
Bruno Fazi, Jr, Allison Park, PA (US);
Joseph B Havrilla, Pittsburgh, PA (US);
Stanley R Lewandowski, Cheswick, PA (US);
David M Reilly, Glenshaw, PA (US);
Medrad, Inc., Pittsburgh, PA (US);
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.