Edge-folded steel head combined shoe's insole

Abstract

An edge-folded steel head combined shoe insole has a groove defined in a front end and two sides of the insole. The insole is also provided with an inner welt downwardly extended peripherally thereunder, and is thickened gradually from a rear end to a front end. The depth of the groove is shorter than the thickness of the inner welt so that a folded edge of the steel head can be inserted in the groove. This avoids conflict of a sewing needle to the folded edge of the steel head when sewing the vamp onto the inner welt of the insole, thereby the steel head is well supported to have shoe's strength heightened.

What is claimed is:  
     
         1 . An edge-folded steel head combined shoe insole, comprising a downwardly extended inner welt arranged peripherally in a bottom face of the insole; the insole being gradually thickened from a rear end to a front end; a groove defined in a front edge and two sides of the insole and having a depth shorter than the thickness of the inner welt.  
     
     
         2 . The insole according to  claim 1 , wherein the insole is formed integrally by injection techniques.