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:
Oct. 09, 2001
Filed:
Jul. 10, 2000
The Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
A communication cable is provided that satisfies the requirement of Cat.6 for near-end cross talk wherein the difference between the maximum and minimum values of delay time among the four twisted wire pairs constituting the cable is within 25 ns/100 m. The communication cable is made by entwining four twisted wire pairs (T,), (T,), (T,), (T,) made by twisting pairs of insulated wires made by covering electrically conductive wires by polyolefin thermoplastic resin with each pair being twisted with a twist pitch different from the others (pitch: P,<P,<P,<P,) and the inter-pair interposer (,) made of polyolefin thermoplastic resin, while being entwined with each wire pair, around a central interposer (,) made of polyolefin thermoplastic resin having cross sectional area of S,. Cross sectional area S,of the central interposer (,) satisfies the relationship of inequality S,≧[{4.1 d/(1+{square root over (2)})}·0.35],×&pgr;, while the inter-pair interposer (,) that is entwined with the twisted wire pairs is located at such a position as adjoins the twisted wire pair (T,) having the least pitch P,and does not adjoin the twisted wire pair (T,) having the largest pitch P