Magnetic tape cassettes

Details Magnetic tape cassettes Magnetic tape cassettes

1987-05-22

1988-09-27

Werner, David

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

G11B 2310

Patent

active

047736151

ABSTRACT:
A magnetic tape cassette has an improved reel spring, slack limiter and tape guide. The reel spring has a generally rectangular shape with first and second parallel edges extending substantially along its entire length. A flat, central base portion of the spring is bounded by a pair of transition portions which extend at an angle out of the plane of the base. A pair of outer end portions set at a sharper angle to the base complete the spring configuration. A polypropylene slack limiter applies a preloaded tension on the magnetic tape. The polypropylene eliminates the need for laminating a separate bearing material to the slack limiter. The tape guide has a semi-cylindrical, stainless steel insert attached to a plastic mounting core. The core is fastened to the cassette housing.

REFERENCES:
patent: 4290567 (1981-09-01), Saito
patent: 4620255 (1986-10-01), Cook et al.
patent: 4639967 (1987-03-01), Bordignon

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