The control unit controls print of {HEAD ~ a background design image} by the first development unit and print of a print image by {TAIL ~ the second development unit} 
The control unit controls print of { HEAD ~ a background design image } by the first development unit and print of a print image by { TAIL ~ the second development unit }
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 TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL