Cassette for film and driving means thereof

Claim 1

A cassette for film comprising a rectangular case including an upper and a lower compartment forming halves of said case, a partition plate disposed between the halves of the case, a supply reel and a take-up reel rotatably and coaxially mounted within each half of the case respectively on opposed sides of said partition plate, a plurality of tapered, rotatable guide rollers located substantially adjacent the corners of said case for successively receiving the film from one of said reels, for directing the film from the plane of said one reel toward a plane intermediate the planes of said reels, then in a plane parallel to and intermediate the planes of said reels, then in a direction toward the plane of the second of said reels and finally directing the film into the plane of said second of said reels, and a rotatable cylindrical correcting guide roller disposed between each of the first and last tapered guide rollers and the associated reel and adjacent said first and last tapered guide rollers respectively, whereby the film is always passed around the same circumferential distance of said first and last tapered guide rollers to provide a constant and uniform path for said film between said rotatable correcting guide rollers.