Collapsible file box

A collapsible file box comprising:

• (a) a rectangular base;
• (b) a rectangular lid which is substantially structurally identical to the base, and therefore interchangeable with the base;
• (c) a pair of generally rectangular ends adapted to extend vertically upwardly from the rectangular base, each end further including a plurality of side tabs extending outwardly from each of two side edges of the end;
• and
• (d) a pair of generally rectangular sides adapted to extend vertically upwardly from the rectangular base, each side having a plurality of grooves at each of two side extremities of the side to receive the tabs on the ends so that the tabs may be inserted into the grooves to assemble the collapsible file box only with the sides and ends in correct orientation to each other;
• wherein each end and each side further includes a bottom tab of selected thickness extending downwardly from a bottom edge of each side and each end, the bottom tabs being substantially co-planar to the sides and ends from which they extend, said bottom tabs including an inside and an outside face and each side extremity of a side comprises a cornering portion having the upper and lower grooves;
• wherein the rectangular base and the rectangular lid each further include (i) a skirt around the periphery thereof extending normally from an inside surface of the base and lid, said skirt including a skirt edge, four inside faces, and four inside corners, each inside face including a plurality of protuberances, and (ii) four jutting projections extending normally from the inside surface of said base, each jutting projection located a distance slightly greater than the thickness of the bottom tabs of the sides and, ends, inside from the center of each of the four inside faces of said skirt, (iii) four cornerpiece tabs extending normally from the inside surface of the base and lid to a distance beyond the skirt edge, each cornerpiece tab molded to one of the four inside corners of said skirt;
• wherein after the two ends are securely assembled together with the two sides and then the rectangular base is seated into the bottom tabs of the sides and ends, the four cornerpiece tabs on the base abut the four cornering portions of the sides helping to maintain the position of said base, and the protuberances on each inside face of the base skirt abut against the outside face of a bottom tab, and each jutting projection on the base abuts against an inside face of a bottom tab so that the jutting projections in combination with the protuberances on the base apply a pressure to both faces of said bottom tabs, creating a friction force which helps retain the base to the bottom tabs;
• and
• wherein when the lid is seated properly on the assembled side and ends, the four cornerpiece tabs on the lid abut the four cornering portions of the sides helping to maintain the position of said lid so that the skirt edge of the lid rests on the top edges of the two ends and of the two sides.