Tape cassette having a reel braking mechanism

Winding – tensioning – or guiding – Strand tensioning device – Tortuous course

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Details

242199, 360132, G11B 1532, G11B 2304

Patent

active

044524072

ABSTRACT:
A tape cassette is loaded with respect to a recording and/or reproducing apparatus having a reel driving mechanism including at least one reel driving shaft. The tape cassette comprises a cassette case, reels provided within the cassette case, for winding a tape, and a reel braking mechanism for preventing unnecessary rotation of the reel when the tape cassette is not used, and releasing the braking when the reel driving shaft is inserted into the reel. The reel braking mechanism comprises a first teeth part having crests and valleys, formed on the lower surface of the reel, a second teeth part having crests and valleys, formed on a bottom plate of the cassette case at a position opposing the first teeth part of the reel, and a spring for urging the reel towards the bottom plate of the cassette case so that the first and second teeth parts mesh with each other. The crests of at least one of the first and second teeth parts the formed with a tapered surface on at least one side thereof.

REFERENCES:
patent: 3900171 (1975-08-01), Serizawa
patent: 3913145 (1975-10-01), Wiig
patent: 3941333 (1976-03-01), Carpenter et al.
patent: 3950785 (1976-04-01), Findley
patent: 3987980 (1976-10-01), Sperry
patent: 4183477 (1980-01-01), Iwase et al.
patent: 4232840 (1980-11-01), Sugawara
patent: 4341365 (1982-07-01), Oishi
W. G. Jackson and D. H. Johnson, "Tape Cassette", IBM Technical Disclosure Bulletin, vol. 14, No. 8, Jan. 1982.

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