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:
Mar. 12, 1991
Filed:
Apr. 10, 1989
Applicant:
Inventors:
Keiji Ueno, Osaka, JP;
Haruo Saen, Tochigi, JP;
Assignee:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ;
U.S. Cl.
CPC ...
264-14 ; 264-15 ;
Abstract
The present invention provides a method of manufacturing an optical fiber of high heat-resisting and light-receiving properties as well as greater flexibility. The optical fiber of the present invention comprises a core made of a setting type transparent silicone rubber, and an outer portion made of a high molecular weight transparent substance whose refractive index is at least 0.02 less than that of the core. Silicon rubber is injected into the cylindrical outer portion and set, and the silicone rubber and the outer portion are thereafter subjected to heat treatment at a temperature of 120.degree. C. or more for at least 1 hour.