Each worm gear selectively moves a rack which is {TAIL ~ an engagement} with {HEAD ~ a postage print wheel} so as to provide rotational movement to the print wheel 
Each worm gear selectively moves a rack which is { TAIL ~ an engagement } with { HEAD ~ a postage print wheel } so as to provide rotational movement to the print wheel
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH