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:
Aug. 26, 1986
Filed:
Jan. 16, 1985
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Abstract
The invention provides an efficient and accurate method for reducing the diameter of a rod or tube of glass, e.g. fused quartz glass rod as a base material of optical fibers, by drawing when the rod or tube is heated and in a softened and plastically deformable state. Different from conventional methods in which the glass rod or tube is held in a horizontal disposition and drawn in the horizontal axial direction or the rod or tube is held vertically and drawing is effected by the downward movement of the lower grip, the rod or tube in the inventive method is held vertically and drawing thereof is effected by the upward movement of the upper grip along with the gradual downward shift of the heating zone relative to the lower grip so that the problems in the prior art methods such as warp and an uneven diameter profile of the drawn rod or tube can be minimized.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile