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US 4,685,849 AGranted
Method for making an easy opening container end closure
AssigneeAluminum Company of America
InventorsRobert L. LaBarge, Robert E. Heffner
Life of this patent
Estimating the term…
Abstract
A closure for closing the open end of a container having contents therein which dissociate a gas therefrom. The closure is adapted to provide an opening for access to the contents. The opening is adapted for a snap assembly with a plastic cap to effect a substantially gas-tight seal of the opening under high pressures to enable resealing of the container after dispensing a portion of the contents.
Claims12
A method of making an end closure for a container comprising the steps of:
- providing a metal blank having an end wall and means for attaching the end wall to the open mouth of a container;
- forming an upwardly projecting spout having a sidewall and an end wall in the end wall of the blank:
- coining a marginal portion of the end wall around the periphery of the spout to extrude metal outwardly to form a continuous lip on the spout, with the lip having a top wall, a bottom wall, and an outwardly arcuate wall connecting the top and bottom walls.
Dependencies are inferred from the claim text.