Glass manufacturing – Processes – Reshaping or surface deformation of glass preform
Reexamination Certificate
2006-02-14
2006-02-14
Walls, Dionne A. (Department: 1731)
Glass manufacturing
Processes
Reshaping or surface deformation of glass preform
C065S305000
Reexamination Certificate
active
06997019
ABSTRACT:
A press die and a molding process can form a disk member having a shaft shaped portion at a center with satisfactory circularity and flatness in a disk portion, dimensional precision in the shaft shaped portion, and concentricity between the disk portion and the shaft shaped portion at the center. The press die is designed for press molding of a glass substrate of a disk member with a shaft shaped portion at a center thereof. The press die includes an upper die forming an upper surface of the disk member, an intermediate die having a shaft forming hole portion for forming a shaft shaped portion projecting from a disk portion of the disk member, a lower die for forming a lower surface of the shaft shaped portion and a guide member for guiding the upper die, the intermediate die and the lower die.
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Hibino Kunio
Kainuma Kengo
Kataoka Hidenao
Kawata Tatsumi
Nimura Kazuo
Fuji Electric & Co., Ltd.
Sartori Michael A.
Venable LLP
Voorhees Catherine M.
Walls Dionne A.
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