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:
Nov. 08, 2022
Filed:
Mar. 17, 2020
Nippon Electric Glass Co., Ltd., Otsu, JP;
Futoshi Suzuki, Otsu, JP;
Osamu Odani, Otsu, JP;
NIPPON ELECTRIC GLASS CO., LTD., Shiga, JP;
Abstract
Provided is a method for producing a glass material by a containerless levitation technique, which enables production of a large-sized glass material. The method includes the steps of: preparing a forming member and a cover member, the forming member including a gas jetting portionin which a plurality of gas jet holesfor use in levitating a block of glass raw material are formed, the cover memberwhich is capable of covering a peripheral portion of a gas jetting surfaceof the gas jetting portionand in which a controlling surfacecontrolling, near the peripheral portion of the gas jetting surface, a flow of gas jetted through the gas jet holesis formed and an openingcapable of releasing the gas to outside is formed; placing the block of glass raw material on top of the gas jetting surfaceand covering the peripheral portion of the gas jetting surfacewith the cover member; and heating the block of glass raw material to melting while holding the block of glass raw material levitated by jetting the gas through the gas jet holesand then cooling the melted block of glass raw material.