Boots – shoes – and leggings – Boots and shoes – Foot-supporting or foot-conforming feature
Patent
1989-02-03
1990-10-23
Meyers, Steven N.
Boots, shoes, and leggings
Boots and shoes
Foot-supporting or foot-conforming feature
36115, 12142P, 264223, A43B 718, A43D 900, B29H 708
Patent
active
049642294
ABSTRACT:
Multi-layer footwear formed of laminated layers of material which are sealed together with a polymeric glue used in the original manufacture of the footwear to secure the various layers of material together. The layers of material held together by polymeric glue are capable of being heated to a degree at which the footwear, when placed in a vacuum bag or compression chamber, is molded to adopt the shape of the foot inside the footwear under atmospheric pressure once pressure inside the bag is reduced or pressure in the compression chamber is increased. The footwear is heated to the point where the synthetic components of the layers of material are flexible under thermoforming conditions, but within a temperature range in which the polymeric glue continues to perform as an adhesive so that the sealed laminated surfaces do not separate. A polymeric glue is used because it can secure the laminated layers of material together during manufacture of the footwear and continue to perform as an adhesive during heating and cooling of the laminated layers of material in a custom-molded condition.
REFERENCES:
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patent: 3848286 (1974-11-01), Kahmann
patent: 3848287 (1974-11-01), Simonsen
patent: 3895405 (1975-07-01), Edwards
patent: 3896202 (1975-07-01), Palau
patent: 4168341 (1979-09-01), Siedenstrang et al.
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patent: 4433494 (1984-02-01), Courvoisier et al.
patent: 4654986 (1987-04-01), George
patent: 4724627 (1988-02-01), Sisco
patent: 4813090 (1989-03-01), Ibrahim
"Warm'n Form", Thermo-Mold Medical Products, Inc. 1974.
Meyers Steven N.
Sport Maska Inc.
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