Inner part of shoe with a surface massaging the soles of the feet and process for its fabrication

Claim 1

Inner part for a shoe in the shape of an insert sole or innersole, comprising a substructure formed of a compact sole-shaped elastic material structure, said substructure having an upwardly facing surface and a downwardly facing surface and having a longitudinal axis extending in the toe-heel direction of said substructure, a plurality of lugs arranged in rows on the substructure for massaging the sole of a foot, said lugs having an approximately cylindrical base extending upwardly from said substructure and a rounded head on the upper ends of said lugs, and a soft material covering located above the lugs, wherein the improvement comprises that the covering (2) is cut without oversize to the sole shape of said substructure, said lugs (3) are spaced apart from adjacent said lugs, the covering (2) is glued to the heads of the lugs (3), whereby the covering (2) is undulated having a waveform with crests over the lugs and depressions between the lugs, said covering (2) in the region of the depressions being spaced upwardly from the upwardly facing surface of said substructure and forming, in combination with the substructure and lugs, air channels (5) between the covering and the substructure and between adjacent said lugs, said covering (2) is perforated at least in the ball and heel area of the foot, said lugs (3) are arranged in rows extending generally transversely of the longitudinal axis with said rows crossing at an angle of approximately 120°, and the rows of the lugs (3) are arranged at an angle of approximately 60° to the longitudinal axis of said substructure.