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Slitter for tamper-evident closures

  • US 5,636,958 A
  • Filed: 02/10/1995
  • Issued: 06/10/1997
  • Est. Priority Date: 02/10/1995
  • Status: Expired due to Fees
First Claim
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1. In a rotary slitter for container closures for forming a separable tamper indicating ring on a skirt portion of said closures, said slitter including a relatively stationary hub mounting a sun gear, a rotating dial mounting a plurality of star gears engaging said sun gear, each of said star gears driving a rotary arbor supporting closures on an internal tool against a knife blade for slitting said skirt, the improvement comprising:

  • said sun gear having a tooth bearing periphery including alternately spaced arcuate and rectilinear segments, a pivotally mounted arbor housing rotationally supporting said arbor and shifting said arbor about a pivot point spaced from the axis of rotation of said arbor to enable said star gear to continuously engage both arcuate and rectilinear segments of said sun gear;

    and a segmented slitting knife having a rectilinear cutting edge operative to slit closures when said star gear is engaged with a rectilinear segment of said sun gear.

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