The drive mechanism of the apparatus moves the drive shaft 22 to begin moving {TAIL ~ the cam member} 24 toward {HEAD ~ the tube} 20 
The drive mechanism of the apparatus moves the drive shaft 22 to begin moving { TAIL ~ the cam member } 24 toward { HEAD ~ the tube } 20
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH