Plastic article or earthenware shaping or treating: apparatus – With apparatus assembly or dismantling means or with idle part – For extrusion or injection type shaping means
Reexamination Certificate
2006-03-28
2006-03-28
Heckenberg, Donald (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
With apparatus assembly or dismantling means or with idle part
For extrusion or injection type shaping means
C425S542000, C425S810000
Reexamination Certificate
active
07018193
ABSTRACT:
A die for molding disc substrates, includes, in a stamper, a to-be-held surface that diverges continuously from an inner circumferential surface of a center hole. An inner stamper holder holding the inner circumferential side of the stamper includes a cylindrical body and a claw including a cavity forming surface substantially parallel to the inner circumferential side head surface, and a holding surface diverging tapered toward the cavity holding the to-be-held surface. In the cylindrical body portion, a cylindrical surface that is opposed to the inner circumferential surface of the stamper. The die prevents the claw of the inner stamper holder from projecting from a transfer surface of the stamper and solves a problem of insufficient strength of the inner circumferential side of the stamper.
REFERENCES:
patent: 4447381 (1984-05-01), Matey
patent: 4532095 (1985-07-01), McNeely
patent: 5849225 (1998-12-01), Ebina
patent: 2004/0191352 (2004-09-01), Koyama et al.
patent: 62-80620 (1987-05-01), None
patent: 3032851 (1998-10-01), None
patent: 10-302328 (1998-11-01), None
Computer translation of JP 10-302328.
Patent Abstracts of Japan, 05-054427, Mar. 5, 1993, Optical Disk Base Plate And Its Molding Die.
Patent Abstracts of Japan, 10-302328, Apr. 28, 1997, Optical Disk Molding Device, Stamper Disposed At Otical Disk Molding Device And Optical Disk Molded By Optical Disk Molding Device.
Browdy and Neimark PLLC
Kabushiki Kaisha Meiki Seisakusho
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