Method and apparatus for forming drum closure

Details Method and apparatus for forming drum closure Method and apparatus for forming drum closure

1989-08-01

1990-11-27

Eley, Timothy V.

Metal working

Method of mechanical manufacture

Assembling or joining

29453, 295274, 72335, 220601, B23P 1102

Patent

active

049725688

ABSTRACT:
A method for forming a threaded dispensing opening for a cylindrical drum container having a generally flat circular closed bottom, a generally flat circular closed top, and a cylindrical side wall comprising the steps of forming an aperture in the drum top and drawing the drum metal adjacent the aperture upwardly to define an upwardly extending annular shoulder. The shoulder is then compressed downwardly to thicken the shoulder and a female threaded portion is formed on the inside of the annular shoulder which is receptive of a threaded closure member.

REFERENCES:
patent: 1623325 (1927-04-01), Witmore
patent: 3923192 (1975-12-01), Walters
patent: 4706836 (1987-11-01), Grich

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