In the preferred embodiment, said air flow is supplied through {TAIL ~ a tube} which is mounted at or near {HEAD ~ said carriage assembly} 
In the preferred embodiment , said air flow is supplied through { TAIL ~ a tube } which is mounted at or near { HEAD ~ said carriage assembly }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD