Increased strength for metal beverage closure through reforming

Details Increased strength for metal beverage closure through reforming Increased strength for metal beverage closure through reforming

1985-09-05

1987-02-10

Pollard, Steven M.

Receptacles

Receptacle side wall made of two or more layers of material...

Beverage receptacle

431 8, B65D 808

Patent

active

046417613

ABSTRACT:
Metal beverage closures of increased strength may be produced by a reform process which requires the initial production of a non-standard shell having a reduced countersink radius and reduced panel height. The shell is reformed, preferably in the conversion process, to industry standard dimensions, with the reduced countersink radius being maintained. To provide adequate material in the curl portion of the closure for seaming, the initial shell is provided with a reduced chuckwall diameter which is then reformed to industry standard dimensions.

REFERENCES:
patent: 4031837 (1977-06-01), Jordan
patent: 4093102 (1978-06-01), Kraska
patent: 4109599 (1978-08-01), Schultz
patent: 4448322 (1984-05-01), Kraska
patent: 4559801 (1985-12-01), Smith et al.
patent: 4571978 (1986-02-01), Taube et al.
patent: 4577774 (1986-03-01), Nguyen

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