Charles N Mckay

US Patent:

39649458, Jun 22, 1976

Filed:

May 9, 1974

Appl. No.:

5/468537

Inventors:

William Duke Everhart - Florence SC
Charles Raymond McKay - Severna Park MD

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

H01B 718
H01B 1326

US Classification:

156 52

Abstract:

A corrugated plastic article comprising at least two corrugated plastic films each of polyethylene terephthalate held in contact with each other and capable of substantially maintaining its shape under extreme use conditions. Such corrugated plastic article when heated for 5 minutes at 150. degree. C. has a percent (%) fallout (i. e. , the original peak-to-peak height of the corrugations minus the retained peak-to-peak height thereof after heating divided by the original peak-to-peak height) of less than 35%. In an electrical cable having a conductor core, this corrugated plastic article provides an improved protective member for the core, having good dielectric strength and mechanical strength, electrical stability, low moisture sensitivity and other properties, wherein the corrugations, strength and shape-retention capabilities of the article provide improved cushioning, insulation and other protection for the core.

Author:

Charles McKay

ISBN #:

3525857101

Author:

Charles W. McKay

ISBN #:

0132121751

Author:

Charles Lloyd McKay

ISBN #:

0805452354