Method of making a cassette reel spring having rolled edges

Details Method of making a cassette reel spring having rolled edges Method of making a cassette reel spring having rolled edges

1990-11-09

1992-01-14

Echols, P. W.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

723792, 360132, B23P 1300

Patent

active

050798154

ABSTRACT:
A reel spring for a magnetic tape cassette is formed from a thin, elongated strip of stainless steel. The side edges of the strip are folded over by stamping or rolling to form longitudinal stiffeners. The stiffeners effectively increase the thickness of the strip at the edges, allowing the use of less expensive raw material without sacrificing functionality.

REFERENCES:
patent: 2860685 (1958-11-01), McDonald
patent: 4709290 (1987-11-01), Schoettle et al.
patent: 4717091 (1988-01-01), Schoettle et al.

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