Inner sole for an article of footwear, and an article of footwear having an inner sole

Abstract

An inner sole for an article of footwear that is capable of being removed therefrom, the sole having an upper surface adapted to support the user's foot, and a lower surface resting at the bottom of the article of footwear, the sole having an anti-slip insert positioned in the area of the metatarsophalangeal articulation and including an abrasive paper positioned in a recess of the lower surface. The invention is also directed to a sports boot, such as a ski boot, equipped with such an inner sole.

What is claimed is:  
     
         1 . An inner sole for an article of footwear capable of being removed from the article of footwear, said inner sole comprising: 
 an upper surface adapted to support a user's foot;    a lower surface adapted to rest at a bottom of the article of footwear;    an anti-slip insert comprising by an abrasive paper and positioned in a metatarsophalangeal articulation area.    
     
     
         2 . An inner sole according to  claim 1 , wherein: 
 said lower surface has a recess in which the anti-slip insert is positioned.    
     
     
         3 . An inner sole according to  claim 1 , wherein: 
 said anti-slip insert is constituted by a coating of an abrasive amalgam.    
     
     
         4 . An inner sole according to  claim 1 , wherein: 
 said anti-slip insert consists of said abrasive paper.    
     
     
         5 . An article of footwear comprising: 
 an inner sole removable from within the article of footwear, an abrasive insert being arranged between a lower surface of said inner sole and a bottom of said footwear.    
     
     
         6 . An article of footwear according to  claim 5 , wherein: 
 said abrasive insert is fixed to said lower surface of said inner sole.    
     
     
         7 . A sports boot comprising: 
 a shell;    a liner positioned within said shell, said liner being non-fixed/removable from said shell, said liner having a bottom including an upwardly facing foot-supporting surface;    an inner sole supported by said upwardly facing foot-supporting surface;    an abrasive insert positioned between a lower surface of said inner sole and said upwardly facing foot-supporting surface of said liner.    
     
     
         8 . A sports boot according to  claim 7 , wherein: 
 said liner includes a lasting sole and an upper, said upper of said liner and said lasting sole being sewn together;    said liner further includes an outer sole affixed beneath said lasting sole.    
     
     
         9 . A sports boot according to  claim 8 , wherein: 
 said inner sole is positioned in contact with said lasting sole.    
     
     
         10 . A sports boot according to  claim 7 , wherein: 
 said boot is a ski boot and said shell is a rigid plastic shell having been formed by injection molding.