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:
Oct. 04, 1988
Filed:
Nov. 19, 1987
Thorbjorn Andersson, Sodra Sandby, SE;
Peter Frisk, Malmo, SE;
AB Tetra Pak, Lund, SE;
Abstract
A packing container (2) includes a container body consisting of side walls (3,4), an arbitrary bottom closure (5), and a top closed by a bellow-type folded and heat sealed closure so as to form a top closure of the gable-top type which can be unfolded to expose an emptying opening (25) in the form of a pouring spout. To facilitate this re-unfolding, certain portions of the surfaces which are heat-sealed to one another are coated within the area of the unfoldable part of the top closure with a seal-weakening composition which is based on an aqueous dispersion of a thermoplastics material, preferably polythene, which is modified by a carboxymethyl cellulose, preferably sodium carboxymethyl cellulose.