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:
Jan. 31, 1989
Filed:
Dec. 01, 1987
Jurgen Farber, Kaarst, DE;
PKL Papier- und Kunstoff Werke Linnich GmbH, Dusseldorf, DE;
Abstract
In a die-cut cardboard blank coated on at least one side with plastic and/or aluminum foil and capable of being folded into a liquid packaging container having a planar, rectangular folded bottom sealed in a liquid-tight manner with an overlapped seam and a protected edge on the inner bottom fold-in panel, the improvement which comprises providing the blank with an inner bottom fold-in panel having in its marginal area a die-cut notch extending beyond the visible area when folded, this notch being filmed over with the coating material. Alternatively, the blank may be provided with an inner bottom and triangular fold flaps, the triangular fold flaps having tips which in folded condition abut one another and cover the inner bottom fold-in panel, the tips being die-cut and filmed over with coating material.