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:
Oct. 05, 1993
Filed:
Jun. 05, 1992
Tatsuhiko Saitoh, Yokohama, JP;
Toshio Danzuka, Yokohama, JP;
Sumitomo Electric Industries Ltd., Osaka, JP;
Abstract
A glass soot deposit is produced at a high deposition rate by blowing a gaseous glass-forming raw material together with a fuel gas from a combustion burner in a closed muffle, hydrolyzing the glass-forming raw material in a flame to generate glass soot, and depositing the glass soot on a tip end or a peripheral surface of a starting member which is rotated to form a glass soot deposit, in which a lowest surface temperature of the muffle tube is maintained at 50.degree. C. or higher and an average surface temperature of the muffle is maintained in a range between 50.degree. C. and 150.degree. C., whereby corrosion of the muffle is prevented.