The shoe insole of claim 6 wherein said noncorrosive, electrically conductive fibers are made from at least one of the following materials: copper, aluminum, nickel, chromium, zinc, carbon, stainless steel, monel, duralumin, or other alloys of copper, aluminum, nickel, chromium, or zinc.9.
Degradation of an electrically conductive shoe insole is often subtle but can become lethal.
It usually starts slowly, then accelerates rapidly as the electrically conductive adhesive begins to exude through the fabric.
This allows the electrical charges to be transferred from the user's foot to the conductive shoe. and 4,926,570 issued to Fohst; as well as Japanese patents 88-039658/06 issued to Kokoku and 52-32744 issued to Sato.
Patents which describe various types of such shoe insoles include: U. It has been discovered that conventional electrically conductive insoles progressively lose their ability to conduct electrical charges through a process known as degradation.
An electrically conductive shoe insole is disclosed for cushioning a user's foot and for transferring electrical charges from the wearer's foot to a conductive shoe.
The shoe insole includes a cushioned layer, which contains an electrically conductive material, and a fabric, which is bonded to the top...The shoe insole of claim 11 wherein said electrically nonconductive adhesive means is thinly applied to said fabric to enable an electrical charge to be transferred from said noncorrosive, electrically conductive fibers to said cushioned layer.b) a woven fabric positioned cushioned layer, said fabric having from about 90-99% by weight of polyester fibers and from about 1-10% by weight of nonoxidating metallic fibers interwoven therein, said polyester fibers being treated with a hydrophobic surfactant to increase the rate at which absorbed moisture can be dispersed over the volume of said noncellulose fibers; and16.The shoe insole of claim 15 wherein said electrically nonconductive adhesive means comprises a two-part polyol/diisocyanate compound derived from polyols having a polyol molecular weight ranging from about 500-3000.The cushioned layer contains an electrically conductive material, such as particles of carbon black, which are uniformly distributed throughout.The shoe insole also includes a woven fabric positioned above the cushioned layer which allows moisture to be transferred away from the wearer's foot.Briefly, this invention relates to an electrically conductive shoe insole which uses a nonconductive adhesive.