Ventilated Patents (Class 12/142V)
  • Patent number: 4505660
    Abstract: A one-piece, washable and sterilizable plastic shoe comprising a lower part with a top on which the foot bears and a bottom enveloping an outsole and a heel, and an upper part having ventilating openings in a substantially vertical lateral area, these openings having upper and lower outer boundary edges that are lower, respectively, than the corresponding upper and lower inner boundary edges thereof. The method for producing such a plastic shoe includes the steps of introducing mouldable plastic into a mould comprising top and bottom halves with a shoe last therebetween and simultaneously forming the lateral ventilating openings by means of spaced pins extending between the bottom-half mould and the last. The apparatus for producing the shoe comprises a mould having top and bottom halves with a shoe last therebetween and a plurality of pins extending from the bottom-half mould into removeable engagement with the shoe last.
    Type: Grant
    Filed: March 3, 1982
    Date of Patent: March 19, 1985
    Assignee: NATEC Institut
    Inventors: Hartmut Seidel, Winrich B. Hammerschmidt
  • Patent number: 4476600
    Abstract: A one-piece, washable and sterilizable plastic shoe comprising a lower part with a top on which the foot bears and a bottom enveloping an outsole and a heel, and an upper part having ventilating openings in a substantially vertical lateral area, these openings having upper and lower outer boundary edges that are lower, respectively, than the corresponding upper and lower inner boundary edges thereof. The method for producing such a plastic shoe includes the steps of introducing mouldable plastic into a mould comprising top and bottom halves with a shoe last therebetween and simultaneously forming the lateral ventilating openings by means of spaced pins extending between the bottom-half mould and the last. The apparatus for producing the shoe comprises a mould having top and bottom halves with a shoe last therebetween and a plurality of pins extending from the bottom-half mould into removeable engagement with the shoe last.
    Type: Grant
    Filed: March 3, 1982
    Date of Patent: October 16, 1984
    Assignee: NATEC Institut
    Inventors: Hartmut Seidel, Winrich B. Hammerschmidt
  • Patent number: 3965516
    Abstract: A footwear fabrication process and product are disclosed. The footwear is characterized by flexibility, lightness and excellent ventilation.
    Type: Grant
    Filed: July 17, 1974
    Date of Patent: June 29, 1976
    Inventor: Juan Alvarez Romero