One piece self-standing blow molded plastic containers made from a monobase preform

  • US 5,913,438 A
  • Filed: 11/02/1995
  • Issued: 06/22/1999
  • Est. Priority Date: 01/30/1995
  • Status: Expired due to Fees
First Claim
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1. A self-standing polyester container for carbonated beverages defining a longitudinal axis and comprising a sidewall portion which is integral with and terminates in a closed base portion of a petaloid form defining at least three feet disposed about the longitudinal axis whereby the container is self standing, each said foot being defined by:

  • i) a support pad;

    ii) a sloping outer wall extending generally upwardly from a radially outward extremity of the support pad to the sidewall portion;

    iii) sloping lateral walls extending generally upwardly from radially extending extremities of the support pad to radially extending straps disposed between adjacent pairs of feet, each said strap extending from a gate area, centered on said longitudinal axis, along a curve to said sidewall portion;

    iv) a sloping inner wall extending from a radially inner extremity of the support pad to the gate area; and

    , v) a reinforcing ring located on said curve between said gate and said sidewall portion, in a substantially smooth transition between said support pad and said sloping outer wall, and extending circumferentially around said base portion through said feet, said lateral sloping walls and said straps;

    whereinsaid gate area has a wall thickness less than a wall thickness in a gate area of a like capacity container, having a like base structure, made from a preform having a wall thickness in a transition between a sidewall forming portion and a base forming portion substantially equal to the wall thickness of both said sidewall and base forming portions.

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