US Patent:
20030061014, Mar 27, 2003
Inventors:
J. Cheng - Burr Ridge IL, US
XiaoXu Yuan - Chicago Ridge IL, US
International Classification:
G06F017/10
Abstract:
A method of designing a molded polymeric container includes steps of determining that the container will have a champagne type base and subsequently determining the relative dimensions of the champagne type base substantially according to the formula: where His the height of the central push-up area, P is a preform index that is equal to the thickness Tof the preform times the middle radius Rof the preform; His the height of the base portion, Ris the maximum outer radius of the base portion, Ris the radius of an annular contact ring, Tis the thickness index of a molded plastic material that the area of the annular contact ring; and Ris the radius of the central push-up area.