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:
Apr. 16, 2002
Filed:
Feb. 15, 2001
Satoshi Fukuyama, Numazu, JP;
Toshihisa Kamano, Numazu, JP;
Isao Matsuzuki, Numazu, JP;
Hiroshi Murakoshi, Mishima, JP;
Toshiba Machine Co., Ltd., Tokyo, JP;
Abstract
A press forming machine for optical devices which manufactures, an optical device from silica glass with a high glass transition point. A transparent quartz tube surrounds an upper die unit, lower die unit, fixed shaft, and moving shaft to form an airtight chamber inside it. Infrared lamps are arranged along the outer surface of the transparent quartz tube, and a reflecting mirror is arranged behind the infrared lamps. A cooling gas jacket is formed to cover the rear surface of the reflecting mirror. The inner-diameter side wall surface of the jacket and the reflecting mirror have many through holes. A cooling gas is sprayed from the interior of the jacket toward the transparent quartz tube through the through holes, thereby cooling the reflecting mirror, quartz bulbs constituting the outer surfaces of the infrared lamps, and the transparent quartz tube.