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:
Nov. 23, 1982
Filed:
Apr. 14, 1980
Applicant:
Inventors:
Gianmario Lanfranconi, Trezzo d'Adda, IT;
Bernardino Vecellio, Milan, IT;
Assignee:
Industrie Pirelli S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01B / ;
U.S. Cl.
CPC ...
1741 / ; 1741 / ; 1741 / ;
Abstract
A product by process for reducing micro-voids in cross-linked cable insulation without reducing the voltage breakdown strength thereof in which process the insulation, after cross-linking, is heated at a temperature in the range from about 120.degree. C. to about 150.degree. C. and under a pressure less than 10 mm. Hg for a period from about 8 hours to 48 hours. Also, a cable having such insulation which has micro-voids less than about 10.sup.2 per mm.sup.3 and a perforation gradient greater than the perforation gradient of a cable which has not been so treated.