Seamless drawn and ironed container with opening means and metho

Details Seamless drawn and ironed container with opening means and metho Seamless drawn and ironed container with opening means and metho

1977-11-10

1979-06-12

Keenan, Michael J.

113 7R, B21D 5138

Patent

active

041576934

ABSTRACT:
A method and apparatus for forming a seamless container having a sidewall and an integral end wall with opening means in the integral end wall is disclosed herein. The method contemplates forming at least one substantially closed area of reduced thickness in the end wall to produce a fracturable web that defines an opening means during the conversion of a flat disc to a finished container. In one form, the method contemplates initially forming a shallow cup and then forming the opening means in the end wall of the shallow cup before the cup is converted into a drawn and ironed container. In another form, the opening means is formed while the container end wall is being reformed into its final configuration and in a further version, the end opening means is formed in the end wall after completion of the drawing and ironing process. The finished container includes a reformed end wall that is integral with a circular sidewall of a container and has a fracturable web surrounding a protuberance. The invention also contemplates apparatus for carrying out the above method and results in a container which may have a flat end panel attached to the open end of the drawn and ironed container to produce a beverage package.

REFERENCES:
patent: 3300080 (1967-01-01), Close
patent: 3301433 (1967-01-01), Wade
patent: 3302823 (1967-02-01), Hulse
patent: 3339789 (1967-09-01), Stolle et al.
patent: 3430593 (1969-03-01), Stolle et al.
patent: 3446167 (1969-05-01), Armbruster et al.
patent: 3448887 (1969-06-01), Geiger
patent: 3726244 (1973-04-01), Arangelovich
patent: 3881437 (1975-05-01), Lovell et al.
patent: 3938455 (1976-02-01), Urmston
patent: 4062311 (1977-12-01), Zugcic

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