Heat insulating insert for footwear

Details Heat insulating insert for footwear Heat insulating insert for footwear

1980-01-18

1981-02-10

Lawson, Patrick D.

Boots, shoes, and leggings

Boots and shoes

Heated

36 10, A43B 702, A43B 310

Patent

active

042493196

ABSTRACT:
A heat insulating insert for a footwear which comprises a base sheet having a shape conforming with that of the sole of an average human foot and a toe cover at the toe portion of the base sheet for embracing the toe of the human foot. Porous bags containing exothermic agent therein are provided on the inner surface of the top of the toe cover and the toe portion of the base sheet in opposing and spaced relationship to the exothermic agent bag on the inner surface of the top of the toe cover and also in a portion of the base sheet corresponding to the plantar arch of the human foot. The exothermic agent performs exothermic reaction with the open air.

REFERENCES:
patent: 3493986 (1970-02-01), Erwin
patent: 4023282 (1977-05-01), Ziegelheafer
patent: 4094080 (1978-06-01), Sanders
patent: 4145822 (1979-03-01), Mitchell et al.

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