A dot type printer of the type using printing pins or wires is improved by employing a driving system which includes a variable volume sealed container enclosing {HEAD ~ a pressure} transmitting {TAIL ~ medium} 
transmitting
A dot type printer of the type using printing pins or wires is improved by employing a driving system which includes a variable volume sealed container enclosing { HEAD ~ a pressure } transmitting { TAIL ~ medium }
OTH OTH OTH OTH OTH OTH 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 TAIL TAIL TAIL TAIL TAIL