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:
Sep. 14, 1999
Filed:
Aug. 13, 1998
Carl C Grotnes, Atlanta, GA (US);
Kenneth R Babcock, Marietta, GA (US);
Archie Tan, Roswell, GA (US);
Atlanta Grothes Machine Company, Atlanta, GA (US);
Abstract
Apparatus for forming beads in the cylindrical wall of a metal drum blank comprising a die head and an opposed roller, for engaging the interior and exterior surfaces, respectively, of a cylindrical drum blank. The die head has first, second and third coaxial, circular dies, each made up of plural, wedge-shaped die elements. The roller has two coaxial peripheral edges cooperable with the dies to form a W-style bead. The second die is located between the first and third dies and is radially expansible, by the frusto-conical surface of a cam, for producing a standard bead. The same frusto-conical surface also expands the first die, and a separate frusto-conical surface expands the third die. Lands on the cam engage the wedge-shaped elements of the first and third dies and maintain the first and third dies at fixed radial positions in engagement with the inner cylindrical wall of a drum blank, while the cam continues to urge the wedge-shaped elements of the second die radially outwardly. The die head optionally includes a fourth circular die spaced axially from, but coaxial with, the first, second and third dies, and a second roller opposed to, and cooperable with, the fourth die for forming a reduced neck in a drum blank.