After the taking up of a sheet of glass by the upper form, a current of hot gas is blown under {TAIL ~ the glass sheets} in order to produce {HEAD ~ a pneumatic pressing} 
After the taking up of a sheet of glass by the upper form , a current of hot gas is blown under { TAIL ~ the glass sheets } in order to produce { HEAD ~ a pneumatic pressing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD