Tierable and nestable receptacle with hinged gate member

Claim 1

A RECEPTACLE ADAPTED FOR TIERING WITH OTHER LIKE RECEPTACLES, INCLUDING A RIGID FRAME COMPRISING A BOTTOM PORTION, MEANS DEFINING UPPER EDGES SPACED ABOVE SAID BOTTOM PORTION, SIDE WALL PORTIONS RIGIDLY CONNECTING SAID BOTTOM PORTION AND UPPER EDGES, TIERING POSITION SUPPORT MEANS INCLUDING A PLURALITY OF UPPER TIERING SUPPORT PORTIONS RIGID WITH SAID UPPER EDGES AND A PLURALITY OF LOWER TIERING SUPPORT PORTIONS RIGID WITH SAID BOTTOM PORTION, SAID LOWER TIERING SUPPORT PORTIONS BEING LOCATED SUBSTANTIALLY VERTICALLY BENEATH SAID UPPER TIERING SUPPORT PORTIONS, SAID LOWER TIERING SUPPORT PORTIONS OF AN UPPER RECEPTACLE BEING POSITIONED TO REST VERTICALLY DOWN UPON SAID UPPER TIERING SUPPORT PORTIONS OF A LOWER LIKE RECEPTACLE IN TIERING POSITION WITH LIKE PARTS OF SAID UPPER RECEPTACLE SUBSTANTIALLY VERTICALLY ALIGNED ABOVE LIKE PARTS OF THE LOWER RECEPTACLE; A MOVABLE WALL ADAPTED TO EXTEND AT LEAST PARTIALLY OVER AN OPEN SIDE OF SAID RIGID FRAME; AND CONNECTING MEANS OPERATIVELY CONNECTING SAID MOVABLE WALL AND SAID RIGID FRAME SO THAT SAID MOVABLE WALL IS MOVABLE RELATIVE TO SAID FRAME BETWEEN A SIDE OPEN POSITION UNCOVERING SAID OPEN SIDE AND PERMITTING LOADING AND UNLOADING ARTICLES ON SAID BOTTOM PORTION THROUGH THE OPEN SIDE AND A SIDE CLOSED POSITION AT LEAST PARTIALLY COVERING SAID OPEN SIDE TO BLOCK REMOVAL OF THE ARTICLES THROUGH SAID OPEN SIDE, LOCK MEANS RESPONSIVE TO TIERING POSITION ENGAGEMENT BETWEEN UPPER AND LOWER LIKE RECEPTACLES FOR LOCKING THE MOVABLE WALL OF ONE OF THESE RECEPTACLES IN SAID CLOSED POSITION AGAINST MOVEMENT IN AN OUTWARD DIRECTION TO SAID OPEN POSITION, SAID MOVABLE WALL BEING LOCKED ONLY WHEN SAID RECEPTACLE IS TIERED WITH ANOTHER LIKE RECEPTACLE.