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. 28, 1989
Filed:
Oct. 30, 1987
Candido J Arroyo, Lithonia, GA (US);
Harold P Debban, Jr, Lawrenceville, GA (US);
Walter J Paucke, Tucker, GA (US);
American Telephone and Telegraph Company, Murray Hill, NJ (US);
AT&T Bell Laboratories & AT&T Technologies, Inc., Berkeley Heights, NJ (US);
Abstract
A communications cable comprising a core of at least one transmission media and a plastic jacket includes provisions for preventing the movement of water within the cable. A water blockable yarn (33) or strip (35) is interposed between the core and the jacket (32) and extends either linearly along the cable or is wrapped helically about a portion of the sheath system. In any plane along the cable which is transverse to the longitudinal axis of the cable, the yarn or the strip extends about an insubstantial portion of an inner periphery of the cable. As a result, any desired bond between the jacket and an underlying element of the cable sheath system is discontinuous for only an insignificant portion of the peripheral surface of contact. The yarn may be one which has been treated with a superabsorbent material whereas the strip may comprise a substrate strip which has been impregnated with a superabsorbent material which upon contact with water swells and inhibits the movement of water within the cable.