Flat insole

Abstract

An insole has an upperside and an underside narrower than the upperside, so as to give an added support, wearing stability, and comfort to the foot.

What is claimed is:  
     
         1 . A flat insole for use in a shoe, the flat insole being of foam material not molded under heat or pressure and comprising a toe portion, a sole portion and a heel portion; 
 wherein prior to engagement in the shoe said toe portion, said sole portion and said heel portion have an upperside, and an underside parallel to, and smaller in width than said upperside, and two slanted sides opposite to each other and connecting said upperside and said underside; wherein said slanted sides form an angle with said underside greater than 90 degrees; and    wherein after engagement in the shoe said slanted sides form arcuate edges against the shoe projecting up from the upperside of the flat insole.    
     
     
         2 . A method for producing the flat insole according to  claim 1  so as to engage a shoe, comprising the steps of: 
 cutting a flat piece of foam material which has not been molded under heat or pressure to have a toe portion, a sole portion and a heel portion forming an initial flat insole wherein an upperside and underside thereof are parallel to each other;  
 cutting the opposite sides of the initial flat insole to form slanting sides connecting the underside to the upperside;  
 wherein said underside of the flat insole is smaller in width than said upperside and said slanted sides and form an angle with said underside greater than 90°;  
 engaging the flat insole in the shoe so that said slanted sides form arcuate edges which abut against the shoe and project up from the upperside of the flat insole.  
 
     
     
         3 . The flat insole according to  claim 1 , wherein the flat insole is engaged in the shoe with the slanted sides forming arcuate edges against sides of the shoe projecting up from the upperside of the flat insole.