Adjustable framework for molding

Claim 1

IN AN ADJUSTABLE FRAMEWORK FOR HOLDING A SHEET OF MATERIAL FOR MOLDING AND INCLUDING AN UPPER FRAME AND A LOWER FRAME THAT ARE SEPARABLE AND THAT CAN BE BROUGHT INTO A CLOSED POSITION IN WHICH SAID UPPER FRAME CLOSELY OVERLIES SAID LOWER FRAME, THE IMPROVEMENT COMPRISING: SUPPORT PLATE MEANS ARRANGED ON ONE OF SAID FRAMES; A PLURALITY OF MOVABLE CLAMPING FINGERS ARRANGED ON THE OTHER OF SAID FRAMES; SPRING MEANS ASSOCIATED WITH EACH OF SAID RESPECTIVE CLAMPING FINGERS FOR BIASING EACH OF SAID FINGERS TOWARD SAID SUPPORT PLATE MEANS WHEREBY SAID CLAMPING FINGERS ARE ADAPTED TO HOLD SAID SHEET AGAINST SAID SUPPORT PLATE MEANS WHEN SAID FRAMES ARE IN SAID CLOSED POSITION; AND CLAMP MEANS FOR FORCING SAID FRAMES INTO CLOSED MUTURAL ENGAGEMENT AND INCLUDING A SLIDABLE LATCH BAR ARRANGED ON ONE OF SAID FRAMES AND LATCH MEANS ARRANGED ON THE OTHER OF SAID FRAMES, SAID LATCH BAR BEING SLIDABLE INTO LATCHING ENGAGEMENT WITH SAID LATCH MEANS WHEN SAID FRAMES ARE IN SAID CLOSED POSITION, SAID CLAMP MEANS ALSO INCLUDING LEVER MEANS PIVOTALLY MOUNTED ON SAID OTHER OF SAID FRAMES FOR ENGAGING SAID LATCH BAR IN SAID LATCH POSITION, AND MEANS ARRANGED ON ONE OF SAID FRAMES FOR URGING SAID LEVER MEANS INTO ENGAGEMENT WITH SAID LATCH BAR SO AS TO FORCE SAID FRAMES INTO SAID MUTURAL ENGAGEMENT.