Heat insulating insert for footwear
First Claim
1. A heat insulating insole for shoes comprising a laminated pad horizontally and vertically contoured to lie within a shoe beneath the foot of the wearer of the shoe;
- said laminated pad comprising a bottom sheet, a spacer sheet and a top sheet;
said bottom and top sheets formed from a flexible organic plastic film and said spacer sheet being formed from a resilient, readily compressible, foamed sheet of organic plastic material having heat insulating properties;
said spacer sheet being bonded to both said bottom and top sheets;
said spacer sheet comprising a continuous perimeter disposed between and bonded to the perimeters of said top and bottom sheets, said spacer sheet further having a plurality of transverse bands integrally joining opposite sides of said continuous perimeter to define a plurality of horizontally spaced chambers;
said chambers being vertically bounded by said top and bottom sheets and horizontally bounded by said transverse bands and said perimeter portion of said spacer sheet;
said chambers being partially filled with loose particles formed from a resilient organic plastic material having heat insulating properties.
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Accused Products
Abstract
A heat retention insole for shoes comprises a laminated structure incorporating a flexible plastic bottom sheet, a similar flexible plastic upper sheet, and a spacer sheet formed primarily of foamed organic plastic material. The spacer sheet is provided with large area apertures defined by bars extending transversely between portions of a perimetral band portion. The large area apertures are loosely filled with particles of insulating plastic material, thus assuring that the top and bottom sheets are maintained in spaced relationship even when subjected to foot pressure. The outer surfaces of the insole are preferably provided with a heat reflecting coating or film to minimize the loss of heat from the foot by radiation and reflect any such radiated heat back into the foot of the wearer.
231 Citations
3 Claims
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1. A heat insulating insole for shoes comprising a laminated pad horizontally and vertically contoured to lie within a shoe beneath the foot of the wearer of the shoe;
- said laminated pad comprising a bottom sheet, a spacer sheet and a top sheet;
said bottom and top sheets formed from a flexible organic plastic film and said spacer sheet being formed from a resilient, readily compressible, foamed sheet of organic plastic material having heat insulating properties;
said spacer sheet being bonded to both said bottom and top sheets;
said spacer sheet comprising a continuous perimeter disposed between and bonded to the perimeters of said top and bottom sheets, said spacer sheet further having a plurality of transverse bands integrally joining opposite sides of said continuous perimeter to define a plurality of horizontally spaced chambers;
said chambers being vertically bounded by said top and bottom sheets and horizontally bounded by said transverse bands and said perimeter portion of said spacer sheet;
said chambers being partially filled with loose particles formed from a resilient organic plastic material having heat insulating properties. - View Dependent Claims (2, 3)
- said laminated pad comprising a bottom sheet, a spacer sheet and a top sheet;
Specification