Canvas stretching frame

Claim 1

A CANVAS STRETCHING FRAME COMPRISING A PLURALITY OF SEPARATE STRIPS, EACH OF SAID STRIPS BEING MITERED AT THEIR REMOTE ENDS, SAID STRIPS BEING FURTHER PROVIDED WITH BEAD STRUCTURE EXTENDING LONGITUDINALLY ALONG THEIR LENGTH, SAID MITERED ENDS OF SAID STRIPS BEING PROVIDED WITH A COMPLEMENTARY TONGUE AND GROOVE STRUCTURE AT THEIR FRONT AND REAR FACES FOR LOCKING INTERENGAGEMENT OF THE ENDS OF THE STRIPS TOGETHER IN PERPENDICULAR RELATION TO ONE ANOTHER TO FORM CORNERS, EACH OF SAID STRIPS BEING FURTHER PROVIDED WITH WEDGE GROOVES ADJACENT SAID TONGUE AND GROOVE STRUCTURE FOR FORCING THE STRIPS APART IN A PERPENDICULAR DIRECTION TO THE ADJOINING MITERED EDGES, WHEN THE WEDGES ARE INTRODUCED INTO THE GROOVES, SAID WEDGE GROOVES BEING FORMED IN SAID MITERED ENDS AT A TAPERED, EVER INCREASING ANGLE RELATIVE TO THE MITERED EDGE, FACILITATING THE INTRODUCTION OF A WEDGE INTO SAID GROOVES AND ACCOMMODATING THE WEDGING ACTION, SAID WEDGE GROOVES CONVERGING TOWARD ONE ANOTHER ALONG AN AXIS DIAGONAL TO THE LENGTH OF THE PERPENDICULAR CONVERGING REMOTE ENDS OF SAID STRIPS, A PAIR OF WEDGES INTRODUCIBLE INTO THE WEDGES GROOVES OF EACH OF SAID CORNERS, SAID PAIR OF WEDGES HAVING THEIR INNER OPPOSING SURFACES PARALLEL WITH ONE ANOTHER AND HAVING THEIR OUTER OPPOSING SURFACES TAPERED RELATIVE TO ONE ANOTHER TO CONFORM TO THE TAPER OF SAID WEDGE GROOVES, EACH OF SAID WEDGES BEING INDIVIDUALLY MOVABLE RELATIVE TO THE OTHER TO INDEPENDENTLY ADJUST AND SEPARATE THE STRIPS APART AT THEIR REMOTE ENDS FOR STRETCHING.