Patent ID: 6477792
Filing Date: 2002-11-12
Classification: A43B

Abstract:
A composite insole suitable for allowing transpiration comprising a first layer of flexible material which has at least one work area, at least one pad made of vapor-permeable material which is applied to said first layer at said work area, and a second layer made of relatively soft material which is permanently applied substantially to a side of said first layer at an area or areas not affected by the pad, the insole further having a through opening at least at one region which is not affected by said pad, and comprising at least one insert made of flexible material, positioned in said through opening, the insert comprising at least one membrane having a border which is coupled between said first and second layers, said membrane being arranged to alternatively take, in use, a rest position, in which it delimits an upper surface convex toward the outside and in relief with respect to said first layer and a lower surface concave toward the outside and recessed with respect to said second layer, and a working position, in which it is substantially within said opening, said membrane comprising at least one resilient yieldable accordion-like peripheral portion and return means for increasing the effectiveness of said insert, when said membrane is in its working position, and facilitating the return of said membrane from said working position to said rest position.