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:
May. 14, 2002
Filed:
Jun. 12, 2001
Elmer D. Werth, Arvada, CO (US);
Container Solutions, Inc., Arvada, CO (US);
Abstract
A container end is provided with a suitable stock thickness for necessary strength and pressure resistance over its selected areas of its central portion while employing a substantially thinner peripheral wall. A method of forming thins the peripheral wall by drawing and ironing in a single workstation using compound die that also shears the blank from sheet stock. Optionally, multi-layers or laminates form the central portion of a lid, with a reduced number of layers forming the peripheral wall. Alternatively, the peripheral wall is thinned by ironing, spinning, or roll forming after the blank is formed into a shell. A forming apparatus clamps a planar peripheral wall of a blank with a clamping element that includes a thining tool. The apparatus oppositely offsets the center of the blank from the peripheral wall to draw the peripheral wall over the thinning tool on the clamping element.