Apparatus for applying a tear strip to plastic tubing

Claim 1

APPARATUS FOR APPLYING A TEAR STRIP TO SEAMLESS TUBULAR PLASTIC MATERIAL FOR MANIFACTURE INTO BAGS HAVING A TEAR STRIP ON PART OF THE WALL THEREOF, SAID APPARATUS COMPRISING A FLOATING ANVIL PLATE, TWO PROTRUDING ROLLERS POSITIONED TO EXTEND FROM THE UPPER AND LOWER SURFACES OF THE ANVIL PLATE, A CARRIER FOR EACH PROTRUDING ROLLER, A COMMON PIVOT EXTENDING THROUGH THE ANVIL PLATE ON WHICH THE CARRIES ARE MOUNTED, SAID PLATE AND PROTRUDING ROLLERS BEING ADAPTED TO BE DISPOSED WITHIN A LENGTH OF SEAMLESS PLASTIC MATERIAL, A PAIR OF TRANSVERSE HOLDING ROLLERS SPACED APART TO PROVIDE A GAP THEREBETWEEN, THE GAP DEFINED BY THE BOUNDING SURFACES OF SAID HOLDING ROLLERS BEING SUFFICIENT TO ALLOW THE ANVIL PLATE AND THE TUBULAR PLASTIC MATERIAL THEREOVER TO PASS THEREBETWEEN, BUT WITH FURTHER LONGITUDINAL MOVEMENT OF SAID FLOATING ANVIL PLATE BEING RESTRAINED BY ENGAGEMENT OF SAID PROTRUDING ROLLERS WITH SAID HOLDING ROLLERS, STRIP SUPPLYING MEANS FOR PROVIDING A TEAR STRIP OVER PART OF SAID PLASTIC TUBULAR MATERIAL ADJACENT SAID ANVIL PLATE, AND SEALING MEANS FOR SEALING SAID TEAR STRIP TO SAID PLASTIC TUBING COOPERATE WITH SAID FLOATING ANVIL PLATE FOR PROVIDING ON EACH BAG LENGTH OF MATERIAL A FREE END FOR SAID TEAR STRIP OF A SIZE THAT MAY BE GRIPPED BETWEEN AT LEAST A FINGER AND THUMB FOR PULLING THE TEAR STRIP FROM SAID PLASTIC MATERIAL IN USE WITH THE TEARING OF THE MATERIAL BEING ALONG THE LINE OF SAID TEAR STRIP.