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:
Jul. 17, 1984
Filed:
Feb. 02, 1983
Applicant:
Inventors:
Jan A Rauser, Lomma, SE;
Gunnar Knudsen, Sodra Sandby, SE;
Assignee:
Tetra Pak International A.B., Lund, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ;
U.S. Cl.
CPC ...
15624423 ; 15624411 ;
Abstract
The invention relates to a method for the manufacture of packing material with good gas-tightness properties by coating a web or a sheet of paper with an aqueous solution containing polyvinyl alcohol and a thickener, e.g. carboxymethylcellulose, subsequently the water is boiled away and the coating layer formed is covered with a thin plastic film.