Double Ended Hemming Roller

Abstract

A hemming roller 22 for a hemming apparatus 10 is disclosed having two frusto-conical hemming surfaces 20 and 21 so as to allow the hemming roller 22 to be reversibly mounted on a spindle shaft 14 of the hemming apparatus 10 to allow both of the hemming surfaces 20 and 21 to be used for hemming.

What is claimed: 
     
         1 . A hemming head comprising a hemming roller having two ends and a frusto-conical hemming surface on both ends. 
     
     
         2 . A hemming head as claimed in  claim 1  wherein the frusto-conical hemming surfaces are separated by a cylindrical central portion. 
     
     
         3 . A hemming head as claimed in  claim 1 , wherein the hemming roller is mountable at either whereby both of the hemming surfaces of the hemming roller may be used to perform a hemming operation. 
     
     
         4 . A hemming head as claimed in  claim 1 , wherein the hemming roller has a central bore used to mount the hemming roller on a spindle shaft. 
     
     
         5 . A hemming head as claimed in  claim 4 , wherein the central bore has a counter bore located at both ends. 
     
     
         6 . A hemming head as claimed in  claim 4 , wherein the hemming head further comprises a retainer and a spacer to rotatably mount the hemming roller on the spindle shaft. 
     
     
         7 . A hemming machine comprising:
 a hemming head, said hemming head having a hemming roller with two ends;   a frusto-conical hemming surface on each of said two ends; and   an arm that may be manipulated to engage a work piece with said hemming head thereby causing the hemming surfaces of the hemming roller to perform a hemming operation on the work piece.