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:
May. 04, 1976
Filed:
Aug. 12, 1974
Applicant:
Inventor:
James Adolph Robertson, West Chester, PA (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ; B05D / ;
U.S. Cl.
CPC ...
427178 ; 156184 ; 156280 ; 427209 ; 427211 ; 427327 ; 427388 ; 427409 ;
Abstract
In a double-pass lamination and coating process, aluminum foil is laminated on one side with paper and then rolled for temporary storage before being coated on the other side with polyethylene. Contaminants from the paper impair the ability of aqueous solutions of chromium complex adhesion promoters to bond the polyethylene to the foil. A wash coat of polyvinyl alcohol before rolling eliminates this impairment.