Method of making elastomeric shoe soles

A method of making a shoe sole having a heel portion, an arch portion, a foot-ball portion, and a ground-engaging surface, which comprises the steps of:

• molding in a mold formed with a cavity shaped as a shoe sole and having a first recess-forming removable cover a wear layer of an elastomeric material in the shape of a shoe sole with a recess being formed at at least one of said portions said recess being elliptical and having a major axis thereof extending in a longitudinal direction of said shoe sole;
• removing said first cover from said mold;
• disposing a layer of substantially nonextensible reinforcing material against said wear layer along a botton wall of said recess, lying substantially parallel to said surface, said reinforcing layer having the same outline as said recess and extending to a boundary thereof;
• and
• rotationally casting in said mold provided with a second removable cover spaced from said wear layer a flowable elastomeric material on said wear layer so that said flowable elastomeric material penetrates into said reinforcing material and said reinforcing material is embedded in said flowable elastomeric material, while lining said recess and an inner surface of said second cover and defining in said recess a sealed gas-enclosing cell substantially coextensive with said recess.