A rotatable screw connected to the upper shaping form provides for moving such form from an elevated position spaced above the open top chamber end, to {HEAD ~ a lowered position} extended into and through {TAIL ~ the chamber} 
extended into
A rotatable screw connected to the upper shaping form provides for moving such form from an elevated position spaced above the open top chamber end , to { HEAD ~ a lowered position } extended into and through { TAIL ~ the chamber }
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 OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL