Method of manufacture of a can end with a push in vent tab and m

Details Method of manufacture of a can end with a push in vent tab and m Method of manufacture of a can end with a push in vent tab and m

1986-05-12

1987-10-20

Schmidt, Frederick R.

Sheet metal container making

Method

Forming or treating metallic closure

413 12, 413 15, 413 17, 413 20, B21D 5144

Patent

active

047010908

ABSTRACT:
A method of manufacturing can ends having a push down vent tab and a push down main tab, with recessed score lines under a double folded ridge of metal, where part of the score lines are broken to facilitate opening the cans. The method of manufacture uses six stations to make the can ends. One station to bubble the surface of the can end. One station to reform the bubble into a side wall and a flat bottom having a raised vent button and a raised tab button. One station for scoring the vent score line and forming the bend ridge. One station for scoring the main score around the main tab. One station for folding the side walls. And one station for depressing the area around the folded side walls and for stenciling the top of the can end. The last step in the manufacture of the can end is to spray a sealant material on the bottom of the can end.

REFERENCES:
patent: 3334775 (1967-08-01), Klien et al.
patent: 3794206 (1974-02-01), De Line
patent: 3886881 (1975-05-01), Pearce
patent: 3958717 (1976-05-01), Ellis
patent: 4018178 (1977-04-01), Kline et al.
patent: 4127213 (1978-11-01), McConnellogue
patent: 4129085 (1978-12-01), Klein
patent: 4186678 (1980-02-01), McConnellogue
patent: 4305523 (1981-12-01), Dalli et al.

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