The pivot shaft is moved horizontally by {HEAD ~ a threaded adjusting screw} toward and away from a vacuum chuck in a silk screen printing machine to compensate for {TAIL ~ changes} to the length of the workpiece to be carried by the vacuum chuck 
The pivot shaft is moved horizontally by { HEAD ~ a threaded adjusting screw } toward and away from a vacuum chuck in a silk screen printing machine to compensate for { TAIL ~ changes } to the length of the workpiece to be carried by the vacuum chuck
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH