The engaged profiles are preferably spot fused together prior to {HEAD ~ the second step} of {TAIL ~ this invention}, which is their separation, depicted in block 16 
of
The engaged profiles are preferably spot fused together prior to { HEAD ~ the second step } of { TAIL ~ this invention } , which is their separation , depicted in block 16
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH