Sheet metal container making – Apparatus to form container closure – Having means uniting pull tab to closure
Patent
1996-09-10
2000-02-08
Lavinder, Jack W.
Sheet metal container making
Apparatus to form container closure
Having means uniting pull tab to closure
413 25, 413 14, 413 16, B21D 5144
Patent
active
060221798
ABSTRACT:
A press assembly for forming and attaching lift-tabs to can ends to form lift-tab can ends. A tab press is mounted on a frame for forming at least one lane of lift-tabs in a strip of metal stock material wherein the strip of metal stock material with the formed lift-tabs loosely attached thereto exits the tab press and is passed through either a half-twist or a half-loop to an inverted condition thereby inverting the tabs within the strip. The strip of metal stock material is further conveyed into a conversion press wherein the lift-tabs are detached from the strip and attached to the can ends. Another method of inverting and thereafter transporting the lift-tabs into the conversion press is to pass a non-inverted strip of metal stock material containing the lift-tabs into a tab punching station where the lane of lift-tabs is punched from the strip of metal stock material into a stacked lane of formed lift-tabs. A conveyor moves the stacked lane of formed lift-tabs through an inverting bend of about 180 degrees enroute from the tab punching station to a conversion press where the conversion press attaches the lift-tabs to the can ends. The lift-tabs are inverted, during the assembly-forming process, from a smooth-side-down to a smooth-side-up position for attachment to the can ends.
REFERENCES:
patent: 3231968 (1966-02-01), Swanson
patent: 4026226 (1977-05-01), Hahn
patent: 4568230 (1986-02-01), Brown
patent: 4723882 (1988-02-01), Wissman
patent: 4762579 (1988-08-01), Shimizu
patent: 4932822 (1990-06-01), DeSilva
patent: 5660516 (1997-08-01), Artrip et al.
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