Wall form panel with inherently reinforced crossbars

Claim 1

A CONCRETE WALL FORM PANEL ADAPTED TO BE POSITIONED VERTICALLY IN EDGE-TO-EDGE RELATION WITH LIKE PANELS FOR PURPOSES OF FORMING A PART OF A CONCRETE WALL FORM, SAID PANEL COMPRISING A RECTANGULAR PLYWOOD FACING AND A RECTANGULAR MARGINAL REINFORCING FRAME INCLUDING VERTICAL OPPOSED PARALLEL SIDE MEMBERS AND HORIZONTAL OPPOSED PARALLEL END MEMBERS, SAID SIDE MEMBERS BEING PROVIDED WITH VERTICALLY SPACED PAIRS OF OPPOSED BOLT-RECEIVING OPENINGS AT EQUALLY SPACED HORIZONTAL LEVELS, AND A SERIES OF GENERALLY TRANSVERSELY EXTENDING PLYWOOD-REINFORCING CROSSBARS HAVING THEIR ENDS SECURED TO THE SIDE MEMBERS RESPECTIVELY, THERE BEING ONE CROSSBAR FOR EACH PAIR OF OPENINGS, EACH CROSSBAR HAVING ONE END THEREOF SECURED TO ONE OF SAID SIDE MEMBERS A SLIGHT DISTANCE BELOW AN OPENING THEREIN AND HAVING ITS OTHER END SECURED TO THE OTHER SIDE MEMBERS A SLIGHT DISTANCE ABOVE AN OPENING THEREIN, ALL OF SAID CROSSBARS EXTENDING IN PARALLELISM AND DEFINING, IN COMBINATION WITH THE SIDE MEMBERS, A SERIES OF PARALLELOGRAM-SHAPED INCLUDED OPENINGS IN THE RECTANGULAR MARGINAL REINFORCING FRAME AND IN WHICH THE CROSSBARS EXTEND AT A SMALL ANGLE TO A HORIZONTAL PLANE, EACH CROSSBAR BEING OF A COMPOSITE RIGID NATURE AND COMPRISING TWO ANGLES PIECES EACH OF WHICH HAS A SUBSTANTIALLY HORIZONTAL FLANGE AND A VERTICAL FLANGE, SAID ANGLE PIECES HAVING THEIR HORIZONTAL FLANGES SECURED TOGETHER IN OVER LAPPING RELATIONSHIP THROUGHOUT A LIMITED MEDIAL REGION OF THE CROSSBAR AND HAVING THEIR VERTICAL FLANGES EXTENDING IN OPPOSITE DIRECTIONS AND IN COPLANAR RELATIONSHIP, THE HORIZONTAL FLANGES OF THE ANGLE PIECES BEING SET ON EDGE AGAINST THE PLYWOOD FACING AND THE VERTICAL FLANGES BEING DISPOSED IN FACE-TO-FACE CONTACT WIT THE PLYWOOD FACING.