Boots – shoes – and leggings – Insoles
Patent
1985-07-12
1987-08-11
Schroeder, Werner H.
Boots, shoes, and leggings
Insoles
36 44, 36 3B, D 2318, A43B 1703, A43B 0706
Patent
active
046852247
ABSTRACT:
A foam latex insole includes a number of ribs on its undersurface. The ribs face the top-sole of a shoe when the insole is placed therein, and are formed of foam latex which is closed-pored and somewhat firmer than the foam latex which forms the continuous part of the insole. The ribs can be straight, curved or sharply bent, and form a labyrinth of ventilation channels between the top-sole of the shoe and the underside of the foot. The arrangement of the rib is such that a pumping effect is developed in response to pressure changes on the insole which promotes the exchange of air within the shoe to maintain a suitable environment for the feet.
REFERENCES:
patent: D70701 (1926-07-01), Precourt
patent: 1194152 (1916-08-01), Douglas
patent: 1517610 (1924-12-01), Bayless
patent: 1605588 (1926-11-01), Huiskamp
patent: 2334719 (1943-11-01), Margolin
patent: 2856771 (1958-10-01), Anderson
patent: 3274708 (1966-09-01), Lukas
patent: 3426455 (1969-02-01), Drago
patent: 4075772 (1978-02-01), Sicurella
patent: 4281467 (1981-08-01), Anderie
Meyers Steven N.
Schroeder Werner H.
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