Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1976-08-04
1978-06-27
Mautz, George F.
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
242 76, 360132, G11B 2310
Patent
active
040970060
ABSTRACT:
A magnetic tape cassette includes a cassette body formed by a pair of cassette halves, molded from a synthetic resin material and having a generally the same configuration and dimension, which are joined together at their open ends. A window slot for receiving a pinch roller is centrally formed in the front end face of the cassette body by partitioning posts, which include an inwardly extending edge for limiting crosswise movement of a magnetic tape and which also include protuberances adapted to reduce friction with the tape. A pair of window slots for receiving magnetic heads are symmetrically formed in the front end of the cassette body on the opposite side of the central window slot. An aperture for receiving a capstan is formed in the cassette toward the front end face in alignment with the window slot which is to receive the pinch roller, and is associated with guide walls. A spring abutment is located immediately behind the capstan aperture, and is provided with a nipple or a projection which defines a fulcrum. A length of magnetic tape is disposed on a tape supply hub which is disposed within the cassette, and is pulled therefrom to extend around tape guide members so that it extends along the respective window slots formed in the front end face of the cassette while maintaining its magnetic surface in parallel orientation with the plane of the slots. Subsequently, the tape is taken up on a tape take-up hub also disposed within the cassette. A pad carrying leaf spring is located between the spring abutment and a portion of the magnetic tape which extends along the window slots, and carries tape pads which urges the tape against a magnetic head or heads which are advanced into the respective associated window slots. A pair of positioning apertures are formed in the cassette adjacent to opposite corners located toward the front end face for enabling the cassette to be positioned relative to an associated cassette tape recorder.
REFERENCES:
patent: 3432111 (1969-03-01), Ryder
patent: 3495787 (1970-02-01), Wallace
patent: 3598339 (1971-08-01), Saito
patent: 3666203 (1972-05-01), Sato et al.
patent: 3800322 (1974-03-01), Schoettle et al.
patent: 3912194 (1975-10-01), Chan
patent: 3980256 (1976-09-01), Schwartz et al.
patent: 3991956 (1976-11-01), Machida
Mautz George F.
Olympus Optical Co,. Ltd.
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