Cassette reel spring tip configuration

Details Cassette reel spring tip configuration Cassette reel spring tip configuration

1989-07-13

1991-09-10

Stodola, Daniel P.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

360132, 267158, G03B 104, G11B 1532

Patent

active

050466836

ABSTRACT:
A reel spring for use in a magnetic tape cassette has an elongated central base portion and adjoining end portions extending out of the plane of the base. The spring has first and second parallel side edges and terminates at transversely extending tip edges. The tip edges are joined to the side edges by cutout edges such that the width of each tip edge is less than that of the overall spring. The method for making the reel spring includes the steps of feeding a continuous strip of spring material into a shaping die for cutting and forming the strip into a finished spring. An end portion of the continuous strip material is severed from the continuous strip to form an individual spring blank. This is done by removing a pair of facing cutouts from the side edges of the strip at the appropriate location and slitting the strip in the area of the two cutouts. The blank is then formed into a finished spring.

REFERENCES:
patent: 4496118 (1985-01-01), Oishi et al.
patent: 4546936 (1985-10-01), Okamura et al.
patent: 4717091 (1988-01-01), Schoettle et al.
patent: 4747007 (1988-05-01), Ikebe et al.
patent: 4770367 (1988-09-01), Carroll

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