After the heated, flattened rubber leaves the milling machine,
it is cut into strips. Still hot from the milling, the strips
are then fed into an extruding machine which forces the rubber
out in long, hollow tubes (much as a meat grinder produces
long strings of meat). Excess rubber regularly builds up around
the head of each extruding machine, and this rubber is cut
off, collected, and placed back with the rubber going into
the milling machine.
