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. 03, 2014
Filed:
Aug. 09, 2010
Toshiaki Sudo, Akita, JP;
Eriko Suzuki, Akita, JP;
Hiroshi Kishi, Akita, JP;
Takeshi Fujita, Akita, JP;
Toshiaki Sudo, Akita, JP;
Eriko Suzuki, Akita, JP;
Hiroshi Kishi, Akita, JP;
Takeshi Fujita, Akita, JP;
Japan Super Quartz Corporation, Akita-Shi, JP;
Abstract
There are provided an apparatus and a method for manufacturing a vitreous silica crucible which can prevent the deterioration of the inner surface property in the manufacturing process of a vitreous silica crucible. The apparatus includes a mold defining an outer shape of a vitreous silica crucible, and an arc discharge unit having electrodes and a power-supply unit, wherein each of the electrodes includes a tip end directed to the mold, the other end opposite to the tip end, and a bent portion provided between the tip end and the other end.