Die for molding disc substrates

Details Die for molding disc substrates Die for molding disc substrates

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.

Affiliated with

Also associated with

Rating

Die for molding disc substrates does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Die for molding disc substrates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Die for molding disc substrates will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3556794