Base design for one piece self-standing blow molded plastic containers
AssigneeDTL Monofoot Limited Partnership
InventorsMartin H. Beck, George F. Rollend, Robert Caldicott, Dennis C. Connor
Life of this patent
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Abstract
The invention provides a light weight self-standing blow molded two-liter carbonated beverage container base design having a unique petaloid base. The base comprises a petaloid design which has a plurality of at least three (preferably five) feet with an ever increasing radius of curvature joining the feet to the underlying base from the radially outer portion of the feet to the radially inner portion of the feet, a controlled radius from the axis of the container to that curvature and an area of material flow in feet ankles and straps therebetween to promote adequate material flow during blow molding, to the radially outer most areas of the feet and straps.
Claims18
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 of a petaloid form having an underlying base form with at least three feet depending therefrom and 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 radially outward from said axis and upward from an outer circumferential convex edge of the support pad to the sidewall portion;
- iii) sloping side walls each extending upward from circumferential convex side edges of the support pad, each of said sloping side walls extending radially from said axis to a transition between each sloping side wall and an associated strap;
- each strap being disposed between adjacent pairs of feet and extending radially outward from a base area, centered on said longitudinal axis, toward said sidewall portion, the straps and the base area conforming to the underlying base form;
- iv) a sloping ankle extending inward and upward from an inner circumferential convex edge of the support pad to a junction with the base area;
- and, v) blending concave curvatures, wherein each of said blending concave curvatures forming the transition of each said sloping side wall and associated strap of each foot, and extending from adjacent a radially outermost extension of the associated strap to a circumferential center of the junction of the associated ankle and the base area, said blending concave curvatures increasing in radius transversely of the curvature from its radially outermost extension to the circumferential center of the junction of the associated ankle and base area at which said blending concave curvatures smoothly joins each other.
Dependencies are inferred from the claim text.