{TAIL ~ A roller} 40 applies a force to the peripheral edge 16 to achieve {HEAD ~ approximately a 60° angle} in a pre hemming step 
{ TAIL ~ A roller } 40 applies a force to the peripheral edge 16 to achieve { HEAD ~ approximately a 60 ° angle } in a pre hemming step
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH