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:
Jul. 12, 2016
Filed:
May. 28, 2013
Fujikura Ltd., Koto-ku, Tokyo, JP;
Shingo Matsushita, Sakura, JP;
FUJIKURA LTD., Tokyo, JP;
Abstract
Provided is a method for manufacturing an optical fiber. The method includes the steps of: heating and melting a silica-based optical fiber preform in a drawing furnace; drawing the melted preform into a linear shape from the drawing furnace, continuously cooling and solidifying the preform to form a bare optical fiber; coating the bare optical fiber with a resin to form an optical fiber; and continuously taking up the optical fiber while applying a tensile force, wherein, when a surface temperature of the cooled and solidified bare optical fiber reached down to 100° C. or lower, a surface of the bare optical fiber is reheated while applying a tensile force so as to remelt only a surface layer of the bare optical fiber, and the surface layer of the bare optical fiber is re-solidified, the bare optical fiber is coated with a resin, and the tensile force is released afterward.