Aperture forming mold for molded structures

Claim 1

AN APERTURE FORMING MOLD ASSEMBLY FOR MOLDED STRUCTURES, COMPRISING, AN ELONGATED HOLLOW MOLD MEMBER OF SHEET MATERIAL HAVING A CLOSED CROSS-SECTIONAL CONFIGURATION WITH OPEN TOP AND BOTTOM ENDS, SAID HOLLOW MOLD MEMBER BEING SPLIT LONGITUDINALLY, WITH THE ADJACENT SIDE EDGES OVERLAPPING EACH OTHER, A PRESSURE BLOCK WITH AN OPENING THERETHROUGH WHICH HAS A FLAT LOWER SURFACE WHICH LAYS ACROSS AND ENGAGES THE PERIPHERY OF THE OPEN TOP OF SAID HOLLOW MOLD MEMBER, A SUPPORT ROD OF SUBSTANTIALLY GREATER LENGTH THAN SAID HOLLOW MOLD MEMBER WHICH EXTENDS THROUGH THE SAID OPENING OF SAID PRESSURE BLOCK AND LONGITUDINALLY THROUGH THE SAID HOLLOW MOLD MEMBER, SAID ROD HAVING A THREADED SECTION WHICH EXTENDS BELOW SAID OPEN BOTTOM END TO ENGAGE A MOLD-BOARD, A SINGLE PLATE BRACKET MEMBER INTEGRAL WITH THE INNER SURFACE OF SAID HOLLOW MOLD MEMBER AND HAVING AN OPENING THROUGH WHICH SAID SUPPORT ROD EXTENDS, SAID BRACKET BEING POSITIONED IMMEDIATELY ADJACENT SAID BOTTOM END OF MOLD MEMBER, THE UPPER END OF SAID SUPPORT ROD HAVING A HANDLE TO FACILITATE TURNING THEREOF, SAID ROD ALSO HAVING A STOP MEANS INTEGRAL THEREWITH LOCATED IMMEDIATELY ABOVE AND IN CONTACT WITH SAID PRESSURE BLOCK, WHEREBY TURNING OF SAID HANDLE WILL CAUSE SAID THREAD TO DRAW THE SAID ROD TOWARD SAID MOLD BOARD TO PRESS SAID PRESSURE BLOCK AGAINST THE TOP OF SAID HOLLOW MOLD MEMBER CAUSING THE BOTTOM END THEREOF TO BE PRESSED AGAINST SAID MOLD BOARD TO HOLD SAID HOLLOW MOLD MEMBER IN FIRM UPRIGHT POSITION WITH RESPECT TO SAID MOLD BOARD, TWO PAIR OF FASTENING BRACKETS WITHIN SAID HOLLOW MOLD MEMBER, ONE BRACKET PAIR ADJACENT THE TOP END AND THE OTHER BRACKET PAIR ADJACENT THE BOTTOM END OF THE HOLLOW MOLD MEMBER, A BRACKET OF EACH OF SAID BRACKET PAIRS BEING IMMEDIATELY ADJACENT ONE OF SAID OVERLAPPING SIDE EDGES AND SPACED A SMALL DISTANCE THEREFROM, THE REMAINING BRACKET OF EACH OF SAID BRACKET PAIRS BEING SIMILARLY POSITIONED WITH RESPECT TO THE OTHER OF SAID SIDE EDGES, TO PERMIT THE OVERLAPPING EDGES TO SLIDE FREELY WITH RESPECT TO EACH OTHER WITHOUT INTERFERENCE FROM THE BRACKETS WHEN SAID CYLINDER IS SLIGHTLY COLLAPSED, SAID BRACKETS BEING L-SHAPED PIECES ONE LEG OF WHICH IS ATTACHED TO THE INNER SURFACE OF SAID MOLD MEMBER, THE OTHER LEG EXTENDING OUTWARDLY FROM SAID SURFACE TRANSVERSELY ACROSS SAID HOLLOW MOLD MEMBER AND HAVING AN OPENING THEREIN, SAID OPENINGS BEING ALIGNED WITHE THE OPENING IN THE CORRESPONDING LEG OF ITS OTHER PAIRED BRACKET WHEN SAID SIDE EDGES OF THE HOLLOW MOLD MEMBER ARE IN OVERLAPPING CONTACT, THE ALIGNED HOLES IN BOTH BRACKET PARIS BEING IN A STRAIGHT LINE, A LOCKING ROD WHICH EXTENDS DOWN THROUGH SAID ALIGNED HOLES AND IS SHORTER THAN THE LENGTH OF SAID HOLLOW MOLD MEMBER, SAID ROD CONNECTING THE PAIRED BRACKETS TO SUPPORT AND FIXEDLY HOLD THE OVERLAPPING EDGES OF THE HOLLOW MOLD MEMBER TOGETHER, SAID ROD WHEN REMOVED PERMITTING THE OVERLAPPING EDGES TO SLIDE WITH RESPECT TO EACH OTHER TO SLIGHTLY COLLAPSE SAID HOLLOW MOLD MEMBER FOR EASY REMOVAL THEREOF FROM THE HARDENED MOLDED STRUCTURE.