The carriage is cycled twice during the time one carrier is pulled from the elevator into {HEAD ~ relatching engagement} with {TAIL ~ the main conveyor} 
with
The carriage is cycled twice during the time one carrier is pulled from the elevator into { HEAD ~ relatching engagement } with { TAIL ~ the main conveyor }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL