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:
Jun. 09, 1992
Filed:
Nov. 08, 1991
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
An apparatus of producing an optical glass element of the present invention comprises the steps of 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 to adhere to the second heat working jig on the basis of the difference in wettability with high temperature glass between the first heat working jig and the second heat working jig, thermally deforming the gob of optical glass on the second heat working jig to form an optical glass preform, and forming the optical glass preform under heating and pressure by using pressing moulds to form an optical glass element.