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:
Feb. 15, 1977
Filed:
Jan. 24, 1975
David Haddon Dawes, Westbrook, CA;
Kashmiri Lal Gupta, Kingston, CA;
Du Pont of Canada Limited, Montreal, CA;
Abstract
A process for the heat lamination of a first film of polyethylene, polyamide, polyester, and such films coated with polyvinylidene chloride, to a second film of polyethylene, ionomer, and such films coated with polyvinylidene chloride. The surface of the first and second films has been treated with a corona discharge prior to heat lamination, and preferably the second film has an adhesion promoter on its surface. The process has the steps of (a) bringing the first and second films into contact, (b) contacting the combined films with a roll heated to a temperature greater than that required to produce low peel strength but less than that at which the laminate adheres to it, (c) passing the laminate through a heated zone to increase the peel strength, and (d) cooling the laminate.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile