an outer chamber having an inlet connected to the conduit for receiving the articles therefrom, and an outlet for discharging {HEAD ~ the articles} collected from {TAIL ~ the conveyor} 
collected from
an outer chamber having an inlet connected to the conduit for receiving the articles therefrom , and an outlet for discharging { HEAD ~ the articles } collected from { TAIL ~ the conveyor }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL