Film transport mechanism
AssigneeCompagnie Generale de Radiologie
InventorJoseph Munch
Life of this patent
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Abstract
A transport mechanism for sheets of X-ray film includes a pair of cooperating rollers, at least one of which is hollow, between which the top sheet of a stack of sheets in a loading cartridge is transported to a location within the associated X-ray machine, where it is exposed. The attachment of the sheet of film to the hollow roller is aided by reducing the air pressure therein, providing suction to the film through a slot or slots in the periphery of the hollow cylinder. The drive assembly for the rollers includes various switches and relays, actuated automatically by cams or manually, for controlling the transport of the film into the X-ray machine and for delivering the exposed film to a developing machine.
Claims7
An X-ray film transport apparatus, comprising in combination:
- a. a housing;
- b. a hollow cylinder, arranged to rotate within said housing and equipped with means for the evacuation of air therefrom;
- c. a transport roller arranged to rotate within said housing, in cooperation with said hollow cylinder;
- d. a film loading cartridge containing sheets of film, placed within the housing, adjacent to said hollow cylinder;
- e. drive means for rotating said hollow cylinder to advance the film sheet for exposure;
- f. means for initiating the return motion of the sheets of film from the apparatus after exposure thereof;
- and
- g. means for controlling the feed of the sheets of film in said film loading cartridge seriatim for exposure whereby the top sheet of film in said film loading cartridge is aspirated to the surface of said hollow cylinder after evacuation of some air therefrom, and is transported between said hollow cylinder and said transport roller to be exposed, whereupon said means for initiating the return motion of the film are engaged and the motions of said hollow cylinder and said transport roller are reversed for transporting the film out of the apparatus.
Dependencies are inferred from the claim text.