Endless tape videocassette structure

G - Physics – 11 – B

Patent

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Details

G11B 23/02 (2006.01) G11B 15/02 (2006.01) G11B 15/18 (2006.01) G11B 15/665 (2006.01) G11B 17/00 (2006.01) G11B 23/06 (2006.01) G11B 27/10 (2006.01) G11B 31/00 (2006.01) H04N 5/765 (2006.01) H04N 5/775 (2006.01)

Patent

CA 2177156

An endless tape videocassette (10) is provided which is relatively inexpensive to manufacture while providing a relatively long serpentine path (A, B, C, A', B' C') for the tape (40), maintaining at least some tension (22, 24, 28) on substantially all portions of the tape when the cassette is in its operative or play state, and preferably also when the cassette is in its inoperative state, and which assures that there is substantially no intertape contact and no significant contact between the tape and static surfaces when the tape is being played Systems (64-69) are also provided to utilize an endless tape videocassette (10) for the continuous play of an audiovisual clip and/or for the random accessing of video frames or other data units stored on the tape (40), or for real-time browsing of video image frames.

La présente invention concerne une cassette vidéo (10) à bande sans fin. Cette cassette est relativement bon marché à fabriquer. Elle comporte une longueur de bande (40) sinueuse (A, B, C, A', B', C') relativement longue. Elle conserve suffisamment de tension (22, 24, 28) sur pratiquement toute la longueur de la bande lorsque la cassette est en utilisation ou en reproduction, mais de préférence aussi lorsque la cassette n'est pas en utilisation. Cette cassette garantit qu'il n'y a pratiquement aucun contact interbande et sensiblement aucun contact entre la bande et les surfaces statiques lors du défilement de la bande. L'invention concerne également des dispositifs (64-69) permettant d'utiliser une cassette vidéo à bande sans fin (10) pour la reproduction en continu de séquences audiovisuelles et/ou pour l'accès direct à des vues vidéo ou à d'autres unités de données stockées sur la bande (40), ou pour la recherche en temps réel de vues vidéo.

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