Glass manufacturing – Processes – With measuring – sensing – inspecting – indicating – or testing
Patent
1992-01-15
1993-06-01
Woodard, Joye L.
Glass manufacturing
Processes
With measuring, sensing, inspecting, indicating, or testing
65 64, 65 83, 65102, 65158, 65160, C03B 2300
Patent
active
052155668
ABSTRACT:
A method of manufacturing an optical element from glass material is accommodated between an upper member and a lower member of mold. The glass material is press-molded in a state and heated to a desired temperature, thereafter being cooled and released from the mold to form a product having a predetermined optical functional surface. When the product is released from the mold, the upper mold member is first lifted by a predetermined amount, where the product may adhere to the upper mold member. Upon or after releasing and falling of the molded product from the upper mold member due to its own weight or heat stress, the upper mold member is further caused to ascend and the mold is opened so that the molded product can be taken out.
REFERENCES:
patent: 442330 (1890-12-01), Read
patent: 1130918 (1915-03-01), Miller
patent: 3244497 (1966-04-01), Copeland
patent: 3372017 (1968-03-01), Pitbladdo
patent: 3418096 (1968-12-01), Bathellier
patent: 3574587 (1968-11-01), Grundy
patent: 4412798 (1983-11-01), Avellino
patent: 4723976 (1988-02-01), Shanaberger
Nomura Takeshi
Yamamoto Kiyoshi
Canon Kabushiki Kaisha
Woodard Joye L.
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