Initially, that is, when {HEAD ~ no pressurized air} is admitted through {TAIL ~ the conduit} 10 into the chamber 11, the springs 13, 13 will retract the levers 5, 5 and thus the pressing roller 3 at least slightly from the abovementioned opposite major surface so that the leading end of the web 1 can be easily introduced into the advancing arrangement and particularly into the gap between the pressing roller 3 and the driven roller 2 
is admitted through
Initially , that is , when { HEAD ~ no pressurized air } is admitted through { TAIL ~ the conduit } 10 into the chamber 11 , the springs 13 , 13 will retract the levers 5 , 5 and thus the pressing roller 3 at least slightly from the abovementioned opposite major surface so that the leading end of the web 1 can be easily introduced into the advancing arrangement and particularly into the gap between the pressing roller 3 and the driven roller 2
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL 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 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 OTH OTH OTH OTH OTH