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. 19, 1994
Filed:
Sep. 30, 1992
Applicant:
Inventors:
Assignee:
Portola Packaging, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B65D / ; B65D / ;
U.S. Cl.
CPC ...
220270 ; 220266 ; 220276 ; 220359 ; 22912515 ; 222541 ;
Abstract
A container (e.g., an 8 oz. milk container) formed of paperboard, or the like, is formed with an aperture. A plastic disk is attached to the paperboard over the aperture by thermoplastic welding or other means. The disk has a frangible area which is opened to dispense contents. Typically the frangible area is penetrated by the end of a drinking straw. For aseptic packaging, the paperboard may be lined with a barrier, such as foil. Alternatively foil may be attached to the disk and welded to the paperboard surrounding the aperture or welded to a foil or polyethylene liner for the paperboard.