Patent
1978-10-03
1980-01-15
Gilden, Leon
113 1E, 113120Y, 113121A, B21D 3700
Patent
active
041833155
ABSTRACT:
A method and apparatus for attaching an end closure to a cylindrical can body utilizes a tooling arrangement whereby the closure is positioned and compressed through side pressure while the seam is then formed through vertical pressure, producing a double seam. A base plate moves a can body with an end closure into position for attachment where a set of radially movable curling fingers are movable inwardly to a position against the end closure and can body in a slidable relationship therewith. After the curling fingers are in position, the required curling is accomplished when a punch member moves downward relative to the curling fingers and forces the circumferential edge of the end closure into a curled relationship with a downwardly extending flange on the can body. Once the end seam is formed, the punch retracts, releasing the closed can by causing the base plate to raise slightly to permit the curling fingers to retract, thereby releasing the bottom portion of the double seam after which the base plate is lowered. A suitable sealing compound may be used between the closure and the can body flange, thereby forming a tight, hermetically sealed end seam.
REFERENCES:
patent: 3385249 (1968-05-01), Czarnecki
patent: 3556031 (1971-01-01), Frankenberg
patent: 3908572 (1975-09-01), Johnson et al.
patent: 4055133 (1977-10-01), Wessely
Gilden Leon
Weyerhaeuser Company
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