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:
Nov. 24, 1981
Filed:
Apr. 29, 1980
Lars C Carlsson, Blentarp, SE;
Johan H Selberg, Lund, SE;
Tetra Pak International AB, Lund, SE;
Abstract
Packing containers of the non-returnable type for the packaging of milk, etc, frequently have a fold-out pouring spout which is intended to facilitate the pouring out of the milk in a concentrated jet. However, the air which must enter the package via the pouring spout at the same time as the pouring out takes place causes the flow to stop periodically so that the pouring out occurs jerkily. This disadvantage is overcome in accordance with the invention in that the spout is designed to have an emptying duct as well as an air duct. The air duct extends into the packing container over such a length that air can pass unhindered into the packing container without disturbing the flow of the contents through the pouring spout.