Stripper actuating mechanism for differential pressure forming machines

Claim 1

IN A DIFFERENTIAL PRESSURE FORMING MACHINE; FRAME MEANS; A PAIR OF OPPOSING MOLD MEMBERS SUPPORTED THEREBY, AT LEAST ONE OF WHICH IS MOUNTED TO BE MOVED RELATIVELY TOWARD THE OTHER TO AN EXTENDED POSITION ADJACENT A DEFORMABLE PLASTIC SHEET THEREBETWEEN; SAID MOVABLE MOLD MEMBER HAVING CAVITY MEANS TO RECEIVE THE PLASTIC SHEET THEREIN; MEANS CREATING A DIFFERENTIAL PRESSURE ON OPPOSITE SIDES OF SAID PLASTIC SHEET TO DRAW THE SHEET INTO INTIMATE CONTACT WITH SAID CAVITY MEANS; STRIPPER PLATE MEANS ASSOCIATED WITH SAID MOVABLE MOLD; SUPPORT MEANS SUPPORTING SAID STRIPPER PLATE MEANS FOR MOVEMENT INDEPENDENTLY OF THE MOVABLE MOLD AND OPERABLE TO EFFECT WITHDRAWAL OF SAID STRIPPER PLATE MEANS; AND MEANS HAVING A LOST MOTION CONNECTION WITH SAID SUPPORT MEANS OPERATED WHEN SAID MOVABLE MOLD IS BEING WITHDRAWN FROM THE PLASTIC SHEET, AND ONLY AFTER A PREDETERMINED WITHDRAWAL THEREOF, TO ACTUATE SAID MEANS SUPPORTING SAID STRIPPER PLATE MEANS AND WITHDRAW SAID STRIPPER PLATE MEANS.