Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating
Reexamination Certificate
2005-04-05
2005-04-05
Lorengo, J. A. (Department: 1734)
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
C264S001330, C264S334000, C264S335000, C425S556000, C425SDIG001
Reexamination Certificate
active
06875378
ABSTRACT:
An optical disk molding apparatus and method are provided which prevent data formed on a molded object from being damaged and prevent quality deterioration of the molded object. There are provided a mold moving device, a first gas supply device, and a controller, whereby a first release space part is formed by opening molds from a mold clamp state by a movement distance not damaging a data transferred face of the optical disk, and a gas is supplied to the first release space part at a point in time when the first release space part is formed, thereby totally separating the optical disk and a stamper from each other. No damage is caused to a data transferred face at the point in time when the first release space part is formed. Since separation between the optical disk and the stamper is performed via pressure of the gas after the first release space part is formed, data is prevented from being damaged over the data transferred face of the optical disk in its entirety.
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Patent Abstracts of Japan, vol. 18, No. 135 (P-1705), Mar. 7, 1994 & JP 05 314546 A (Hitachi Maxell Ltd), Nov. 26, 1993.
Higashida Takaaki
Inoue Kazuo
Kadoriku Shinji
Kawasaki Yoshihiro
Maruyama Yoshio
Lorengo J. A.
Matsushita Electric - Industrial Co., Ltd.
Wenderoth , Lind & Ponack, L.L.P.
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