Method of extruding

Claim 1

IN A PROCESS FOR UNIFORMLY ENCASING IN A COVERING OF METAL AN ELONGATED MEMBER WHICH CONTINUOUSLY ADVANCES LONGITUDINALLY ALONG A GIVEN PATH, THE STEPS OF INTERMITTENTLY AND FOR RESPECTIVE GIVEN PERIODS OF TIME EXERTING PRESSURE ON SAID METAL IN A FIRST DIRECTION SO AS TO FORCE IT INTO A CHAMBER MEANS AT ONE END THEREOF AND TO CAUSE SAID METAL TO LEAVE SAID CHAMBER MEANS IN SAID FIRST DIRECTION THROUGH THE OTHER END OPPOSITE SAID ONE END SO AS TO EXTRUDE SAID METAL AROUND THE ELONGATED MEMBER ADVANCING LONGITUDINALLY AND TRANSVERSELY OF SAID FIRST DIRECTION PAST SAID OTHER END OF SAID CHAMBER MEANS; AND EXERTING PRESSURE IN SAID FIRST DIRECTION ON THE METAL IN SAID CHAMBER MEANS IN THE INTERVALS BETWEEN GIVEN PERIODS OF TIME BY MOVING SAID CHAMBER MEANS IN A SECOND DIRECTION OPPOSITE SAID FIRST DIRECTION WHILE SIMULTANEOUSLY PREVENTING FLOW OF SAID METAL THROUGH SAID ONE END OF SAID CHAMBER MEANS SO THAT SAID METAL WILL CONTINUE TO LEAVE SAID CHAMBER MEANS THROUGH SAID OTHER END AND IN SAID FIRST DIRECTION IN OPPOSITION TO THE DIRECTION OF MOVEMENT OF SAID CHAMBER MEANS AND WILL THEREBY CONTINUE TO BE EXTRUDE AROUND SAID CONTINUOUSLY ADVANCING ELONGATED MEMBER WITHOUT ANY INTERRUPTION.