Tape cassette with tape leader detection improvements

Details Tape cassette with tape leader detection improvements Tape cassette with tape leader detection improvements

G - Physics

11

B

352/21.2

G11B 5/627 (2006.01) G11B 15/08 (2006.01) G11B 23/087 (2006.01)

Patent

CA 2014336

TAPE CASSETTE WITH TAPE LEADER DETECTION IMPROVEMENTS ABSTRACT OF THE DISCLOSURE An optical tape leader detection system includes a light source and a light detector. In a video cassette using opaque magnetic tape, the tape follows a defined tape path and has a transparent leader at each end thereof, with the free ends of the leader being mounted to first and second tape winding hubs. A light transmissive cassette cover supports the first and second hubs, and a source receiving aperture in the cassette cover is adapted to receive the light source. A window is provided in the cassette cover, allowing light emitted from the light source and passing through the transparent leader portion to reach the light detector along a defined light path. One or more light pipes are mounted in the cassette cover and aligned to define portions of that light path, thereby controlling the source and amount of light with respect to the light detector.

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