Plastic container with a generally hemispherical bottom wall having hollow legs projecting therefrom

US4249667A · kind A · utility

Assignee

• Continental AG · DE

Inventors

• John F. E. Pocock · Neu-Isenburg, DE
• Suppayan M. Krishnakumar · Attleboro, US
• Gautam K. Mahajan · Stamford, US
• Richard E. Clark · Sheffield, GB

Key dates

• Filing date: Oct 25, 1979
• Grant date: Feb 10, 1981
• Expiry date: Oct 25, 1999

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65D1/0284
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

This disclosure relates to improvements in the cross section of a bottom end of a plastic bottle suitable for packaging liquids under internal pressures. The bottom end is primarily one which includes a generally hemispherical bottom wall having projecting therefrom in circumferentially spaced relation hollow legs terminating in supporting feet. The bottom end is stiffened against creep of the plastic material over a period of time under the influence of the internal pressure by changing the configuration of the bottom wall from that of a hemisphere to one which includes a configuration of straight line sections and curved line sections when viewed in radial cross section along the axis of the bottle.