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:
Mar. 21, 2000
Filed:
Dec. 30, 1998
James A McClung, North Canton, OH (US);
Can Industry Products, Inc., Canton, OH (US);
Abstract
A method and apparatus for forming tapered metal container bodies from relatively hard material having a Rockwell hardness within the range of 73 and 79. A disc-shaped blank is formed into a cup having an integral bottom wall and cylindrical sidewall, wherein the sidewall has an axial height generally equal to one-half the axial height of the desired final container body without thinning the metal. The cup is then redrawn at a first redraw station to form a first stage container body having the desired axial height and bottom wall diameter with the sidewall being cylindrical or having a very slight taper. This first stage container body is then redrawn at a second redraw station to impart a taper of between 2.degree. and 4.degree. to the sidewall without affecting the axial height of the sidewall or the metal thickness thereof. The apparatus includes a draw station and at least two redrawn stations and may include a die for profiling the bottom wall of the final container body.