It has been found that it is advantageous if {HEAD ~ the base} of {TAIL ~ the profile} can be adjusted transversely of the film slot so that the size of the base can be adjusted on line 
It has been found that it is advantageous if { HEAD ~ the base } of { TAIL ~ the profile } can be adjusted transversely of the film slot so that the size of the base can be adjusted on line
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD 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