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:
Jan. 31, 2017
Filed:
Mar. 16, 2009
Masaru Sato, Akita, JP;
Masaru Sato, Akita, JP;
SUMCO CORPORATION, Tokyo, JP;
Abstract
A cutting method and an apparatus are provided which enable a rim area or other part of a vitreous silica crucible to be cut off so as to leave a smooth cut surface without damaging the cut edge, etc. The apparatus for cutting the crucible comprises a disk-shaped cutting blade () disposed to be movable with respect to the crucible. Without rotating the crucible (), the rotating cutting blade () is brought into contact with a surface of the crucible wall and pushed forward in the wall thickness direction to make a cut piercing the crucible wall. The cutting blade () is moved relatively to the crucible () in the circumferential direction of the crucible () while keeping the cutting blade in the state of piercing the wall. A rim area () of the crucible () is thus cut off.