Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1984-07-24
1986-03-11
Christian, Leonard D.
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
242 76, 226196, G03B 104, G11B 1532, B65H 2304
Patent
active
045750238
ABSTRACT:
A magnetic tape cassette in which loop formation during slackening of the tape is prevented and the tape is wound on the winding hub without being displaced laterally, thereby preventing jamming of the cassette and deformation of the tape. The cassette includes a pair of hubs on which the magnetic tape is wound, two guide rollers, one at either end of an opening formed in the front of the cassette, and two inner guides, one provided between each of the guide rollers and a respective one of the hubs. Each inner guide includes a cylindrical barrel having a tape sliding surface, and a protrusion extending from the cylindrical barrel. The protrusion, which has a tape sliding surface wider than the tape, is turnable rearwardly of the cassette. A tape guide groove is formed in the tape sliding surface of the cylindrical barrel having a width slightly greater than that of the tape. Stops engage the protrusion so that, on a tape winding side, the tape is made to slide in the guide groove, while on the tape supplying side, when the tape slackens, the protrusion engages with the tape to prevent the formation of a loop.
REFERENCES:
patent: 3658227 (1972-04-01), Stephens
patent: 3991956 (1976-11-01), Machida
patent: 4096538 (1978-06-01), Oishi
patent: 4313551 (1982-02-01), Umehara
patent: 4441133 (1984-04-01), Ogawa et al.
Komiyama Choji
Odate Seiji
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