means operatively connected to {HEAD ~ said heating elements} and said control means for supplying power to said {TAIL ~ heating elements} 
means operatively connected to { HEAD ~ said heating elements } and said control means for supplying power to said { TAIL ~ heating elements }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL