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:
Apr. 17, 1990
Filed:
Feb. 10, 1989
Lars-Erik Piltz, Dalby, SE;
AB Akerlund & Rausing, , SE;
Abstract
Through a centrally placed ingot there is formed an injection moulded cover or end closure for a packaging container comprising at least an outer layer and an easy opening device formed therein, the device having a grip and a tearing denotation starting therefrom. The tearing device includes a first tearing denotation which merges into a circumferential tearing denotation extending inwardly adjacent the periphery of the outer layer and a second tearing denotation spaced from said first tearing denotation and spaced inwardly of said circumferential tearing denotation and extending in a generally spiral shaped path. These tearing denotations, together with a blind groove, define a wide material flow region and several material flow passages through which injected material will flow when exiting the centrally placed ingot. The injected material is channeled out of the material flow regions through the material flow passages in such a way as to form an easily openable container end closure with a tearing device having sharp, well-defined edges.