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