To provide a suitable filling atmosphere around a produce filling pipe on a packing machine and to make possible a rational, accurate cleaning of the filling pipe of the machine without having to dismantle and disassemble the filling pipe at a normal stoppage of the machine, the filling pipe is surrounded...http://www.google.fr/patents/US4964444?utm_source=gb-gplus-shareBrevet US4964444 - Apparatus for cleaning a filling pipe
