The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 11, 1992
Filed:
Jul. 06, 1990
Hideto Monji, Osaka, JP;
Kiyoshi Kuribayashi, Neyagawa, JP;
Masaaki Sunohara, Nishinomiya, JP;
Tadayoshi Yonemoto, Moriguchi, JP;
Noriyuki Kawata, Omiya, JP;
Tadao Shioyama, Sakurai, JP;
Makoto Umetani, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Sumita Optical Glass, Inc., Tokyo, JP;
Abstract
A method and apparatus are provided for producing an optical glass element, including displacing a gob of optical glass on a first heat working jig to a second heat working jig by making the gob of optical glass adhere to the second heat working jig due to a difference in wettability with high temperature glass between the first heat working jig and the second heat working jig. The gob of optical glass on the second heat working jig is thermally deformed to form an optical glass preform. The optical glass preform is formed under heat and pressure by using pressure molds to form an optical glass element.