Expandable luggage

Claim 1

An item of expandable luggage comprising a rigid top peripheral frame, a rigid bottom peripheral frame, a rigid intermediate peripheral frame, each frame having side and end portions fully bounding a planar, substantially rectangular opening and all such openings being of the same size, a rigid rectangular top wall member affixed to the top frame, a rigid rectangular bottom wall member affixed to the bottom frame, an upper peripheral wall member of a pleated sheet material affixed to and extending coextensively with the top and intermediate frames, a lower peripheral wall member of pleated sheet material affixed to and extending coextensively with the bottom and intermediate frames, the pleats of the peripheral wall members extending peripherally so that the peripheral wall members can be selectively expanded and collapsed to define a larger volume and a smaller volume of the luggage item, and foldable rigid side and end wall members, each having an upper portion rigidly affixed to the top frame along a corresponding side or end portion thereof inwardly of the pleated wall members and disposed orthogonally to the plane of the opening defined by the top frame and a lower portion foldable along a fold line parallel to the top and bottom frames, the fold lines of all of the rigid said and end wall members being equidistant from the top of same to further define when unfolded the large volume and when folded the smaller volume.