Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Light polarizing article or holographic article
Patent
1998-05-01
2000-11-14
Vargot, Mathieu D.
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Light polarizing article or holographic article
2491141, 249134, 249135, 26432816, 425810, 427135, B29D 1100
Patent
active
061465585
ABSTRACT:
A method for molding an optical disk comprises: applying a thermally insulative insert coating to at least one thermally insulative mold insert to provide at least one coated mold insert having a reduced surface roughness; positioning the coated mold insert between a thermally conductive mold form and a portion of a thermally conductive mold apparatus; injecting a molten thermoplastic material into the mold apparatus; retaining the material in the mold apparatus for a time sufficient for the molten thermoplastic material to cool below its glass transition temperature to form the optical disk; and ejecting the optical disk from the mold apparatus. In another embodiment, the mold insert is coated or laminated on the mold form with the mold insert having a coefficient of thermal expansion compatible with the coefficient of thermal expansion of the mold form. In another embodiment, the mold insert is fabricated by being applied, cured, and then removed from a release layer.
REFERENCES:
patent: 4225109 (1980-09-01), Yotsutsuji et al.
patent: 4783041 (1988-11-01), Sakaida et al.
patent: 4879082 (1989-11-01), Kudo et al.
patent: 5041247 (1991-08-01), Kim
patent: 5124192 (1992-06-01), Kim et al.
patent: 5176839 (1993-01-01), Kim
patent: 5288519 (1994-02-01), Baumgartner et al.
patent: 5290597 (1994-03-01), Baumgartner et al.
patent: 5302467 (1994-04-01), Baumgartner et al.
patent: 5324473 (1994-06-01), Baresich
patent: 5388803 (1995-02-01), Baumgartner et al.
patent: 5458818 (1995-10-01), Kim et al.
patent: 5897814 (1999-04-01), Niemeyer et al.
U. S. Patent Application "Method for Injection Molding of Optical Discs" by Matthew F.Niemeyer, et al, Ser. No.: 08/874,235, Atty Docket No. 8CT-5646, filed Jun. 13, 1997.
DuPont Technical Bulletin "Pyralin Polyimide Coatings for Electronics VM-651 and VM-652 Adhesion Promoters", H-73153, effective Jun., 1997, one page.
GE Plastics Article "Better Surface Replication for DVD and Recordable Discs Through Managed Heat Transfer" by Matthew F. Niemeyer, et al, pp. 1-10+7 sheets of figures, presented at ITA-MOMOS conference Oct. 1996, San Francisco, CA.
GE Plastics Article "The Application of Managed Heat Tranfer to the Production of Higher Quality Optical Discs" by Matthew F. Niemeyer, et al, 9 pages+7 pages of figures presented at Replitech Conference Jun. 1996 California.
Feist Thomas Paul
Gorczyca Thomas Bert
McConnelee Paul Alan
Saia Richard Joseph
Agosti Ann M.
Breedlove Jill M.
General Electric Company
Vargot Mathieu D.
LandOfFree
Structure and method for molding optical disks does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Structure and method for molding optical disks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Structure and method for molding optical disks will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2062016