One piece self-standing blow molded plastic containers made from

Details One piece self-standing blow molded plastic containers made from One piece self-standing blow molded plastic containers made from

1996-01-26

1998-02-03

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Including application of internal fluid pressure to hollow...

215375, 428 3692, 4285428, B29C 4912, B29D 2200

Patent

active

057141118

ABSTRACT:
The invention provides a light weight self-standing blow molded two liter carbonated beverage bottle having a unique petaloid base made from a monobase preform. The base comprises a petaloid design which has a plurality of at least three (preferably five) feet. The monobase preform has a thick reinforcing ring forming portion which remains relatively unstretched during blowing. The reinforcing ring forming portion is thicker than both the strap forming portion, sloping outer wall forming portion and the gate area forming portion of the preform thereby resulting in increased wall thickness reduction, stretching and orientation in those areas during blowing. The reinforcing ring extends circumferentially around the base. By providing such a reinforcing ring, a bottle having a bigger foot radius and/or containing less material usage than prior art containers can be realized. The resulting bottle has less stress whitening and greater stress crack resistance while at the same time using less material and/or having a larger radius than prior bottles.

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patent: 5116565 (1992-05-01), Yoshino
patent: 5160059 (1992-11-01), Collette et al.
patent: 5614148 (1997-03-01), Beck et al.

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