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:
Jun. 18, 1985
Filed:
Jun. 07, 1983
Lester T Toy, Fremont, CA (US);
Raychem Corporation, Menlo Park, CA (US);
Abstract
A process for manufacturing a sealant coated heat recoverable polymeric article is disclosed. The process includes the steps of extruding at least two different polymeric materials to form a unitary shaped article and thereafter exposing the shaped article to a source of ionizing radiation to thereby cross-link one of the polymeric materials and convert the other polymeric material into a tacky sealant. The article may be rendered dimensionally heat recoverable by either: (a) deforming the article into a different shape at a temperature below the crystalline melt temperature of the cross-linkable material and then exposing the deformed article to a source of ionizing radiation or alternatively, (b) subsequent to an irradiation step, heating the article to about the crystalline melt temperature of the cross-linked material, distorting the article, and then cooling the article while maintaining it in the distorted shape to a temperature below the crystalline melt temperature; thereby by either method rendering the cross-linked portion of the article recoverable toward its original shape upon subsequent heating.