The upwardly extending leg 49 of {TAIL ~ 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 the edge 21a of {HEAD ~ the sheet material} 21 
The upwardly extending leg 49 of { TAIL ~ 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 the edge 21a of { HEAD ~ the sheet material } 21
OTH OTH OTH OTH OTH OTH TAIL 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 HEAD OTH