Footed container

A blow-molded container of thermoplastic resin adapted to receive a filling liquid, said container having a hollow body with a generally cylindrical side wall portion rotationally symmetric about a longitudinal axis of the container, the container additionally having a finish, a shoulder portion integrally joining an upper end of the side wall portion to the finish, and an integral base merging with a lower end of the side wall portion, said base comprising:

• a plurality of generally arcuate segments extending essentially from the cylindrical side wall portion to the longitudinal axis of the container;
• a like plurality of downward projections separated from each other by one of said generally arcuate segments, said downward projections including a first inclined portion adjacent to the longitudinal axis, a second inclined portion situated radially outside of, and axially displaced downwardly from, the first inclined portion, a generally perpendicular ring segment having an upper edge united with the first inclined portion and a lower edge united with the second inclined portion, an upper curved portion located at the union of the generally perpendicular ring segment upper edge and the first inclined portion, a lower curved portion located at the union of said generally perpendicular ring segment lower edge and said second inclined portion, and a radially outwardly and upwardly curved portion uniting the second inclined portion to the side wall portion and defining the axially lower most extent of each downward projection;
• and
• a like plurality of webs extending between the first inclined portion and the generally perpendicular ring segment of each of said downward projections for providing enhanced stability against deflection during entry of the filling liquid into the container.

A blow-molded container of thermoplastic resin having a hollow body with a generally cylindrical side wall portion rotationally symmetric about a longitudinal axis of the container, the container additionally having a finish, a shoulder portion integrally joining the side wall portion to the finish and an integral base merging with the side wall portion, said base being defined by an outer surface comprising:

• a plurality of downward projections separated from each other by generally arcuate segments extending essentially from the cylindrical side wall portion to the longitudinal axis of the container, said downward projections including:
• a first inclined portion adjacent to the longitudinal axis of the container;
• a second inclined portion situated radially outside of and axially displaced downwardly from said first inclined portion;
• a generally perpendicular ring segment having an upper edge united with the first inclined portion and a lower edge united with the second inclined portion;
• an upper curved portion located at the union of the generally perpendicular ring segment upper edge and the first inclined portion, the upper curved portion having a radius of between about 2.00 mm. and about 3.80 mm.;
• a lower curved portion located at the union of said generally perpendicular ring segment lower edge and said second inclined portion, the lower curved portion having a radius of between about 2.30 mm. and about 3.55 mm.;
• a radially outwardly and upwardly curved portion uniting the second inclined portion to the side wall portion and defining the axially lower most extent of each of said downward projections;
• and
• a web extending between the first inclined portion and the generally perpendicular ring segment of each of said downward projections for providing enhanced stability against deflection during entry of the filling liquid into the container.