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:
Sep. 02, 2003
Filed:
Dec. 04, 1997
Koji Shimoda, Yokohama, JP;
Haruhiko Aikawa, Yokohama, JP;
Motohide Yoshida, Yokohama, JP;
Takashi Hasegawa, Yokohama, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
The present invention relates to a method of making an optical fiber product. In particular, this manufacturing method is characterized in that, between a drawing step in which a coated optical fiber comprising a glass fiber and a primary coating layer disposed around the outer periphery of the glass fiber is wound around a reel and a processing step in which the coated optical fiber wound around the reel is rewound around a bobbin, a control step is provided for holding the coated optical fiber wound around the reel in a place with a mean atmospheric temperature T (>0° C.) for at least 30,000/T (hr) and, in the case where a coloring layer or the like is disposed around the outer periphery of the coated optical fiber, for at least 30,000/T (hr) but not longer than 210,000/T (hr). The optical fiber product such as a ribbon-type optical fiber obtained in consequence of this control step, effectively suppressed are increase in transmission loss caused by delamination between the glass fiber and the primary coating layer disposed around its outer periphery, and delamination of the coloring layer disposed around the outer periphery of the coated optical fiber or the like.