Method of manufacturing a recording medium and recording medium

Details Method of manufacturing a recording medium and recording medium Method of manufacturing a recording medium and recording medium

1989-05-09

1991-01-08

Ryan, Patrick J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 65, 428 76, 428913, 369290, 346 76L, 3461351, 156 60, 264106, B32B 300

Patent

active

049834398

ABSTRACT:
A method of manufacturing a disc-like recording medium for use in magnetic, optical, opto-magnetic recording/reproducing devices which are capable of recording still image information and/or reproducing recorded still image information, and a disc-like recording-medium. A center core forming the recording medium is to be carried during the assembling process thereof in such a manner that the other portions of a plate-shaped resilient member than the support point thereof are provisionally secure to a core block by use of an adhesive or that a projection piece section provided in the plate-shaped resilient member is inserted into a recessed portion formed in the peripheral surface of a center hole in the core block so as to be able to secure the projection piece section. Due to this, the plate-shaped resilient member can be prevented from getting out of the core block and also the forces of the plate-shaped resilient member can be maintained at a constant level.

REFERENCES:
patent: 2806704 (1957-09-01), Burdett, Jr.
patent: 2932521 (1960-04-01), Flotgen
patent: 3427033 (1969-02-01), Matsukata
patent: 4630156 (1986-12-01), Saito
patent: 4877667 (1989-10-01), Hattori et al.

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