Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1988-07-22
1990-12-04
Watkins, Donald
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
G11B 23087
Patent
active
049747916
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: 4662579 (1987-05-01), Gelardi et al.
patent: 4685638 (1987-08-01), Satoyoshi et al.
patent: 4717091 (1988-01-01), Schoettle et al.
Koller Manufacturing Corporation
Watkins Donald
LandOfFree
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