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:
Apr. 25, 2000
Filed:
Jan. 30, 1998
Sumitomo Electric Industries Inc., Osaka, JP;
Abstract
In a method of manufacturing a self-support optical cable, a support wire and an optical cable body arranged in parallel are fed with each other; a sheath into an eight figure shape is extruded by an extruder to collectively coat the outer circumferences of the support wire and the optical cable body with the sheath, and thereafter, the self-support optical cable is cooled before hardening while the cable passes through a plurality of guide wheels so that an excess length is given to the optical cable body. In this method, the guide wheels are disposed in a cooling water tank in a manner so that a guide wheel contacting with one side of the self-support optical cable with the sheath in a softened state and another guide wheel contacting with the other side of the self-support optical cable with the sheath in a softened state are disposed alternately in the feed-out direction, said excess length is controlled based on the tension of the support wire, or the tension of said optical cable body at an inlet portion of said extruder is reduced by a tension reducing device.