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. 20, 1993
Filed:
Apr. 02, 1992
Mujib Rahman, Columbia, SC (US);
Pirelli Cable Corporation, Lexington, SC (US);
Abstract
A plurality of optical fiber ribbons, each containing a plurality of optical fibers, are loosely enclosed in a substantially fluid impervious tube of plastic material. A plurality of such ribbon enclosing tubes are wound in S or Z fashion around a central structural member which can be covered with a plastic material. The so-wound tubes are encircled by threads or tape to hold them in place, and a covering of helically wound yarns is applied around the tubes to provide strength. A plastic sheath is applied over the yarns, and if desired the sheath is covered with other layers. Any otherwise empty spaces within the tubes and between the sheath and the tubes is filled with a water blocking material which permits the ribbons to move with respect to the enclosing tubes and which permits the tubes to move with respect to the sheath and the central member.