Once in proper location, as determined in any number of known ways, such as by pressure, distance, or electronic eye, {HEAD ~ the cutting tool assembly} 16 rotates about {TAIL ~ the tube} 20, causing the insert form cutter to cut a plurality of grooves into the tube 
rotates about
Once in proper location , as determined in any number of known ways , such as by pressure , distance , or electronic eye , { HEAD ~ the cutting tool assembly } 16 rotates about { TAIL ~ the tube } 20 , causing the insert form cutter to cut a plurality of grooves into the tube
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 HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH