Abstract: This patent application concerns a molded plastic sole with pliable pumping cushion which, as the person wearing the same walks, forces air into the shoe and through an evacuation chamber with which the sole is fitted and which is connected to the exterior by one or more breather holes.
Abstract: This invention concerns an injection molding process for soles having a colored treading surface produced with expansible and cross-linking "EVA" compounds involving the use of colored inserts molded with the same molding material used for sole, but of a different color, fed into cups on the bottom of the mold impression and shut by caps also molded in the same material used to mold the soles.
© 2026 Justia
