Plastic injection machine

Claim 1

IN A PLASTIC INJECTION MACHINE IN WHICH A FIRST MOLD PART COOPERATES WITH A SUCCESSION OF MOVABLE COOPERATING SELECTABLE MOLD PARTS FIXEDLY MOUNTED ON A MOVABLE TABLE, AN IMPROVED CLAMPING MECHANISM FOR CLOSING SAID FIRST MOLD PART WITH EACH OF SAID SELECTABLE MOLD PARTS OVER A RANGE OF VARIATIONS IN HEIGHT AND PARALLELISM OF SAID SELECTABLE MOLD PARTS WITH RESPECT TO SAID FIRST MOLD PART, COMPRISING MEANS FORMING GUIDEWAYS, A MOLD-SUPPORTING HEAD MOUNTED FOR OPENING AND CLOSING MOVEMENT ON SAID GUIDEWAYS, MEANS DEFINING CLEARANCE BETWEEN SAID HEAD AND SAID GUIDEWAYS PROVIDING LIMITED, SELF-ALIGNING MOVEMENT OF SAID HEAD WITH RESPECT TO SAID GUIDEWAYS IN A PLANE TRANSVERSE TO THE DIRECTION OF THE OPENING AND CLOSING MOVEMENT OF SAID HEAD IN SAID GUIDEWAYS, MEANS ON SAID HEAD SUPPORTING SAID FIRST MOLD PART FOR MOVEMENT THEREWITH BETWEEN AN OPEN RETRACTED POSITION AND A CLOSED POSITION IN WHICH SAID FIRST MOLD PART IS IN CLOSING ENGAGEMENT WITH A SELECTED ON OF SAID COOPERATING MOLD PARTS, A FIRST CYLINDER CONNECTED TO MOVE SAID HEAD BETWEEN SAID OPEN AND SAID CLOSED POSITIONS, A PAIR OF GENERALLY OPPOSITELY POSITIONED LOCKING CAM MEMBERS MOUNTED FOR TRANSVERSE RECIPROCAL MOVEMENT WITH RESPECT TO SAID GUIDEWAYS BETWEEN RETRACTED POSITIONS CLEAR OF SAID HEAD AND INWARD POSITIONS IN ENGAGEMENT WITH SAID HEAD, MEANS ON SAID HEAD AND SAID LOCKING CAM MEMBERS DEFINING MUTUALLY COOPERATING CAM SURFACES EXTENDING GENERALLY THE WIDTH OF SAID MEMBERS AND EFFECTIVE UPON TRANSVERSE INWARD MOVEMENT OF SAID CAM MAMBERS INTO ENGAGEMENT WITH SAID HEAD TO FORCE SAID HEAD AND THE SAID FIRST MOLD PART INTO CLOSING ENGAGEMENT WITH EACH SELECTED ONE OF SAID SELECTABLE MOLD PARTS OVER VARIATIONS IN HEIGHT AND PARALLELISM OF SAID SELECTABLE MOLD PARTS WITH RESPECT TO SAID FIRST MOLD PART BY LIMITED TRANSVERSE MOVEMENT OF SAID HEAD IN SAID GUIDEWAYS, AND A CAM MEMBER OPERATING CYLINDER FOR EACH OF SAID CAM MEMBERS CONNECTED TO MOVE SAID CAM MEMBERS BETWEEN SAID RESTRICTED AND SAID INWARD POSITIONS.