The upwardly extending {TAIL ~ leg} 49 of the U shaped guide bar 48 is attached at its lower end to the third guide 46, so that a right angle guide is formed inwardly of {HEAD ~ the edge} 21a of the sheet material 21 
The upwardly extending { TAIL ~ leg } 49 of the U shaped guide bar 48 is attached at its lower end to the third guide 46 , so that a right angle guide is formed inwardly of { HEAD ~ the edge } 21a of the sheet material 21
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH