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:
Sep. 30, 2014
Filed:
Sep. 29, 2010
Eriko Suzuki, Akita, JP;
Hiroshi Kishi, Akita, JP;
Eriko Suzuki, Akita, JP;
Hiroshi Kishi, Akita, JP;
Japan Super Quartz Corporation, Akita, JP;
Abstract
Provided are an apparatus and a method for manufacturing a vitreous silica crucible, which enable accurate measurement of a fume generation amount, prevention of deterioration of an inner surface property, and real-time control of a raw material melting state. Provided is an apparatus for manufacturing a vitreous silica crucibleby supplying silica powder into a moldto form a silica powder layer, and heating and melting the silica powder layerby arc discharge. The apparatus includes the moldfor defining an outer shape of a vitreous silica crucible, an arc discharge unit having a plurality of carbon electrodesand a power-supply unit, and a fume-amount measurement unitfor detecting an amount of fumesgenerated in the mold