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. 25, 1989
Filed:
May. 22, 1987
James D Duke, New Paris, OH (US);
Aluminum Company of America, Pittsburgh, PA (US);
Abstract
A method of forming either a metal or plastic pilferproof closure is disclosed. The closure has an end wall and an annular sidewall depending therefrom. For a metal closure, an annular ring is rolled in the sidewall so that it protrudes outwardly therefrom. The sidewall is scored adjacent to the annular ring to form a plurality of fracturable bridges which divide the sidewall into upper and lower portions. The annular ring is then compressed so as to form an annular bead which at least partially covers the bridges. The upper portion is susceptible to being deformed about the threaded neck of a container while the lower portion is adapted to be at least partially turned inward and into engagement with an annular shoulder formed on the container below its threaded neck. The annular bead serves to protect the fingers of a person who is removing the closure from coming in contact with the sharp edges of the broken bridges. For a plastic closure, the annular bead can be molded about a lower portion of the sidewall or it can be a separate member which is attached to the closure in a separate operation.