Method of and apparatus for making a blown plastic article

Claim 2

IN A METHOD OF MAKING A BLOW MOLDED ARTICLE FROM A CLOSED BOTTOM INJECTION MOLDED PARISON FORMED ABOUT A CENTRAL PARISON PIN PROJECTING AXIALLY INTO A PARISON MOLD RECESS TO DEFINE AN ANNULAR MOLD SPACE THEREBETWEEN, THE STEPS OF CONTACTING THE FREE END OF THE PIN WITH A COMBINATION ALIGINING AND VALVING MEANS HOLDING THE PIN AGAINST RADICAL DEFLECTION AND IN AXIAL ALIGNMENT WITH THE AXIS OF SAID MOLD RECESS, FLOWING PLASTICIZED MATERIAL THROUGH A VALVE PASSAGE AND ABOUT SAID ALIGNING AND VALVING MEANS TO FILL SAID ANNULAR MOLD SPACE WITH SAID MATERIAL, RELATIVELY MOVING SAID PIN AND SAID ALIGNING AND VALVING MEANS OUT OF CONTACT AND FLOWING PLASTICIZED MATERIAL INTO THE SPACE BETWEEN SAID PIN AND SAID ALIGNING AND VALVING MEANS TO FORM THE CLOSED BOTTOM OF SAID PARISON, AND CLOSING SAID VALVE PASSAGE WITH SAID ALIGNING AND VALVING MEANS BY POSITIONING SAID ALIGNING AND VALVING MEANS IN CONTACT WITH A SURFACE OF SAID VALVE PASSAGE TO THAT SAID ALIGNING AND VALVING MEANS BLOCKS SAID PASSAGE TO THEREBY SHUT OFF THE FLOW OF PLASTICIZED MATERIAL INTO SAID MOLD SPACE.

Claim 3

IN AN APPARATUS FOR MAKING AN INFLATABLE PARISON OF PLASTICIZED MATERIAL AND INCLUDING THE PARISON MOLD HAVING A MOLD SPACE WITH AN OPEN END COMMUNICATING WITH A SOURCE OF PLASTICIZED MATERIAL UNDER PRESSURE AND THE PARISON PIN PROJECTING AXIALLY INTO THE MOLD SPACE TO TERMINATE SHORT OF THE OPEN END THEREOF, THE IMPROVEMENTS OF A VALVE BODY INTERPOSED BETWEEN THE MOLD SPACE AND SAID SOURCE, A VALVE PASSAGE THROUGH WHICH PLASTICIZED MATERIAL FLOWS FROM SAID SOURCE TO SAID MOLD SPACE, SAID BODY HAVING A CONICAL SHAPED END PROJECTING INTO THE MOLD SPACE FOR CONTACTING A REGISTERING CONICAL RECESS IN THE PARISON PIN AND A VALVE PORTION FOR FITTING WITH SAID VALVE PASSAGE TO BLOCK SAID PASSAGE AND THEREBY SHUT OFF THE FLOW OF PLASTICIZED MATERIAL INTO SAID PARISON MOLD, MEANS BIASING SAID VALVE BODY INTO CONTACT WITH THE PARISON PIN CENTRALIZING SAID PIN IN SAID MOLD SPACE AND OPENING SAID VALVE PORTION, AND MEANS FOR SHIFTING SAID VALVE BODY TO A POSITION BLOCKING SAID VALVE PASSAGE FOR INTERRUPTING THE FLOW OF MATERIAL FROM SAID SOURCE TO SAID MOLD SPACE, SAID VALVE PORTION BEING CONSTRUCTED AND ARRANGED TO FORM THE CLOSED END OF SAID PARISON WHEN SHIFTED TO ITS CLOSED POSITION.

Claim 4

IN AN APPARATUS FOR MAKING AN INFLATABLE PARISON OF PLASTICIZED MATERIAL AND INCLUDING THE PARISON MOLD HAVING A MOLD SPACE WITH AN OPEN END COMMUNICATING WITH A SOURCE OF PLASTICIZED MATERIAL UNDER PRESSURE AND THE PARISON PIN PROJECTING AXIALLY INTO THE MOLD SPACE TO TERMINATE SHORT OF THE OPEN END THEREOF, THE IMPROVEMENTS OF A VALVE BODY INTERPOSED BETWEEN THE MOLD SPACE AND SAID SOURCE, A VALVE PASSAGE THROUGH WHICH PLASTICIZED MATERIAL FLOWS FROM SAID SOURCE TO SAID MOLD SPACE, SAID BODY HAVING A CONICAL SHAPED END PROJECTING INTO THE MOLD SPACE FOR CONTACTING A REGISTERING CONICAL RECESS IN THE PARISON PIN AND A VALVE PORTION FOR FITTING WITH SAID VALVE PASSAGE TO BLOCK SAID PASSAGE AND THEREBY SHUT OFF THE FLOW OF PLASTICIZED MATERIAL INTO SAID PARISON MOLD, MEANS BIASING SAID VALVE BODY INTO CONTACT WITH THE PARISON PIN CENTRALIZING SAID PIN IN SAID MOLD SPACE AND OPENING SAID VALVE PORTION, AND MEANS FOR SHIFTING SAID VALVE BODY TO A POSITION BLOCKING SAID VALVE PASSAGE FOR INTERRUPTING THE FLOW OF MATERIAL FROM SAID SOURCE TO SAID MOLD SPACE, SAID VALVE PORTION BEING CONSTRUCTED AND ARRANGED TO FORM THE CLOSED END OF SAID PARISON WHEN SHIFTED TO ITS CLOSED POSITION.