Disc base and mold for molding the disc base

Details Disc base and mold for molding the disc base Disc base and mold for molding the disc base

1994-09-13

1995-12-19

Ahmad, Nasser

Stock material or miscellaneous articles

Circular sheet or circular blank

Aperture containing

360133, 360135, 428156, 428163, 428167, 428694ST, 428694SG, 428900, B32B 302

Patent

active

054767008

ABSTRACT:
A disc base formed concentrically in the recited order from its center opening to its outer circumferential edge with clamp areas on its two faces, a groove by a stamper holder and a signal area both leading from one of the clamp areas on its one face, and a stack rib on its other face. The diameter of the concentric circuit of the top of the stack rib is slightly larger than the diameter of the concentric circuit of the groove formed by the stamper holder, and the angle of the outer slope of the stack rib is larger than the angle of the inner slope of the same. Also disclosed is a mold for molding the disc base.

REFERENCES:
patent: 5092759 (1992-03-01), Lichtinger et al.
patent: 5202171 (1993-04-01), Anezaki

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