Process of reducing blowing cycle for blow molded containers

Claim 1

A process of blow molding in a blow mold a plastic material bottle of the type having a generally hemispherical bottom with said bottom having projecting therefrom in circumferentially spaced relation hollow legs terminating in feet depending a selected axial distance below said bottom and forming the sole support for said bottle, said process comprising the steps of providing a mold having an axial spacing in that portion of said mold for producing said bottle between said bottom and said feet which is greater than said selected axial distance, blow molding a bottle within said mold with a reduction of the cooling time of the blown bottle within said mold as compared to that cooling time required for a bottle formed in a conventional mold with an axial spacing equal to said selected axial distance to thereby reduce molding cycle time and increase the production rate for said mold, and then permitting the blown bottle to finish cooling outside of said mold with said feet shrinking axially relative to said bottom back to substantially said selected axial distance.