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:
Sep. 01, 1992
Filed:
Dec. 10, 1991
Applicant:
Inventors:
Hans-Willi Mainz, Heinsberg-Karken, DE;
Lutz Schneider, Huckelhoven, DE;
Assignee:
PKL Verpackungssysteme GmbH, Linnich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65D / ;
U.S. Cl.
CPC ...
229132 ; 229-31 ; 229137 ; 229134 ; 493133 ; 493326 ; 493327 ;
Abstract
The invention relates to a folding box of composite cardboard material coated heat sealably at least on the inside, which has a flat bottom to which two pairs of opposite triangular folding pockets are sealed lying flat. To prevent bubble formation on the inside of the package, more particularly those areas of the triangular folding pockets which are to be sealed to one another over their complete surface, due to steam forming in the composite cardboard material during the heat activation of the areas, the heat sealable coating is perforated right into the cardboard in the areas.