Dump bin

Claim 1

A COLLAPSIBLE DUMP BIN COMPRISING A SUBSTANTIALLY RECTANGULAR SHEET OF PAPERBOARD, CORRUGATED BOARD, CARDBOARD OR THE LIKE, DIVIDED BY TRANSVERSE EQUI-SPACED AND SUBSTANTIALLY PARALLEL FIRST FOLD LINES INTO FOUR PANELS ARRANGED WHEN THE SHEET IS FOLDED AND ITS TRANSVERSE EDGES UNITED, TO FORM THE FOUR SIDES OF THE DUMP BIN; EACH OF SAID PANELS HAVING A SUBSTANTIALLY RECTANGULAR CENTRAL FLAP THEREIN DEFINED BY THREE CUT LINES AND A SECOND FOLD LINE IN THE RESPECTIVE PANEL, SAID SECOND FOLD LINES BEING SUBSTANTIALLY LONGITUDINALLY ALIGNED IN THE SHEET; EACH CENTRAL FLAP HAVING A THIRD FOLD LINE INTERMEDIATE ITS ENDS PARALLEL TO THE ASSOCIATED SECOND FOLD LINE AND DIVIDING THE FLAP ONTO INNER AND OUTER SECTIONS; SAID SECOND AND THIRD FOLD LINES HAVING A SPACING SUBSTANTIALLY EQUAL TO ONE-HALF THE WIDTH OF THE PANEL ADJACENT THE ONE IN WHICH THEY ARE LOCATED, AND THE DISTANCE BETWEEN EACH THIRD FOLD LINE AND THE FREE EDGE OF THE ASSOCIATED FLAP BEING SUBSTANTIALLY EQUAL TO THE DISTANCE BETWEEN SAID SECOND FOLD LINES AND THE ADJACENT LONGER EDGE OF SAID SHEET; WHEREBY THE CENTRAL FLAPS OF OPPOSED PANELS, WHEN THE DUMP BIN IS ERECTED, MAY BE FOLDED INWARDLY ABOUT THE SECOND AND THIRD FOLD LINES TO JUXTAPOSE THEIR OUTER SECTIONS TO SUPPORT THEIR INNER SECTIONS IN SUBSTANTIALLY HORIZONTAL COPLANAR RELATION TO FORM A RAISED FLOOR FOR THE DUMP BIN; THE CENTRAL FLAPS OF ONE PAIR OF OPPOSED PANELS HAVING FORMATIONS INTERLOCKING WITH FORMATIONS ON THE CENTRAL FLAPS OF THE OTHER PAIR OF OPPOSED PANELS, WHEN THE FLAPS ARE SO FOLDED, TO COMPLETE SUCH FLOOR.