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Apparatus for rotating cylindrical caps onto containers

  • US 5,417,031 A
  • Filed: 08/26/1993
  • Issued: 05/23/1995
  • Est. Priority Date: 08/26/1993
  • Status: Expired due to Term
First Claim
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1. Apparatus for rotating cylindrical, downward facing threaded caps onto upwardly facing, threaded open ends of containers, comprising;

  • a support frame;

    at least one spindle assembly having a generally vertical axis and being slidably carried by said support frame for movement generally parallel to said vertical axis, said spindle assembly including a collet that captures said cap for placement on said container, said cap having a generally vertical axis;

    means positioned adjacent said support frame for advancing said container along a predetermined path, said container having a generally vertical axis and continuing said advancing until said axis of said container is generally aligned with said axis of said cap;

    means carried by said support frame for controlling vertical movement of said spindle assembly caused by the weight of said spindle, assembly comprising;

    a selectively adjustable biasing means carried by said support frame for resiliently urging said spindle assembly upwardly parallel to said spindle axis, such that an upward force created by said biasing means at least partially supports said weight of said spindle assembly, whereby the container is engaged by the cap held by the collet with less than the full weight of the spindle assembly;

    an arm having a first end pivotally connected to said support frame and a second end engaging said biasing means for application of said upward force to said arm for rotation about said first end of said arm; and

    means for connecting said arm to said spindle assembly for imparting generally vertical motion to said spindle assembly whereby the container is engaged by the cap held by the collet with less than the full weight of the spindle assembly; and

    means for rotating said collet when said cap is brought into engagement with said container whereby said cap threadably engages said open end of said container.

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