Method of making a recording disc

Details Method of making a recording disc Method of making a recording disc

1984-09-26

1986-12-02

Goldberg, Howard N.

Metal working

Method of mechanical manufacture

Assembling or joining

360135, B23P 1102, G11B 582

Patent

active

046253840

ABSTRACT:
A recording disc is provided by a disc-shaped, formed-sheet-metal support across which a flexible recording sheet is stretched. The formed-sheet-metal support has a central spindle opening which can be precisely centered by simultaneously punching the spindle opening and the circular periphery, thus permitting high-speed rotation of the recording disc in use.

REFERENCES:
patent: 2662804 (1953-12-01), Hutton
patent: 3130110 (1964-04-01), Schmidt
patent: 3336583 (1967-08-01), Comstock
patent: 3373413 (1968-03-01), Treseder
patent: 3488646 (1970-01-01), Sugaya
patent: 3509274 (1970-04-01), Kihara
patent: 3537083 (1970-10-01), Voth
patent: 3599226 (1971-08-01), Lips
patent: 3668658 (1972-06-01), Flores et al.
patent: 4166622 (1979-09-01), Rager
patent: 4407428 (1983-10-01), Stone
U.S. Ser. No. 283,813 filed Aug. 25, 1972 which is believed to be a translation of item "AL" above.

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