System for forming and securing lift-tabs to can ends having independent tab press and conversion press

CAFC
  • US 7,237,998 B1
  • Filed: 04/19/2006
  • Issued: 07/03/2007
  • Est. Priority Date: 05/12/1993
  • Status: Expired due to Fees
First Claim
Patent Images

1. A system for forming and attaching lift-tabs to can ends to form easy opening lift-tab can ends, wherein each of said can ends includes a rivet to which a lift-tab may be attached, said system comprising:

  • a frame;

    a means for forming a lift-tab, said means for forming a lift-tab being mounted on the frame and adapted to form at least one lane of lift-tabs in a strip of metal stock material;

    a drive roller supported on the frame and adapted to move the strip of metal stock material through the means for forming a lift-tab;

    a means for attaching a lift-tab onto a can end, said means for attaching a lift-tab onto a can end being mounted on the frame and adapted to attach a lift-tab onto a can end to form an easy opening lift-tab can end, and wherein the means for attaching a lift-tab onto a can end includes a conversion press mounted on the frame, said conversion press having a locating means for placing the strip of metal stock material into the conversion press with the lift-tab being placed into working relationship with a can end so that the conversion press may detach the lift-tab from the strip and attach the lift-tab onto the can end to form an easy opening lift-tab can end;

    a conveyor means for conveying the at least one lane of formed lift-tabs from the means for forming a lift-tab to the means for attaching a lift-tab onto a can end;

    a power source for providing power to operate either or both of the means for forming a lift-tab and the means for attaching a lift-tab onto a can end, and wherein the power source includes a tab press power source for providing power to operate a tab press and a conversion press power source for providing power to operate the conversion press; and

    a crank shaft operatively connected to the power source, said crank shaft being adapted to transmit power for operating either or both of the means for forming a lift-tab and the means for attaching a lift-tab onto a can end, and wherein the crank shaft includes a tab press crank shaft that is operatively connected to the tab press power source and adapted to transmit power for operating the tab press and a conversion press crank shaft that is operatively connected to the conversion press power source and adapted to transmit power for operating the conversion press; and

    wherein,the tab press is adapted to operate independent of the conversion press.

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