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