Expandable, large capacity, computer printout storage rack with work surface

Claim 1

A filing rack comprising: a. an array of hollow uprights; b. a plurality of cross-pieces extending in a predetermined pattern between the uprights, each end of each of said crosspieces extending into an upright; c. first connection means integral with the internally disposed end of a cross-piece, which extends into one of the uprights; d. second connection means for mating with said first connection means and integral with an element which extends through said hollow upright for mating with and connection to said first connection means, said connection with said first connection means being internal of a common upright; e. plug means insertable into the upper end of a selected hollow upright; f. a first hole disposed in said plug; g. a first pin disposed in said first hole and extending from said plug element; h. a laterally extending portion extending outward from and integral with said plug element; i. a second hole disposed in said laterally extending portion; j. a second pin disposed in said second hole and projecting upward from the laterally extending portion; k. a leg element integral with said plug extending substantially parallel to the external surface of the common upright and in substantially surface to surface contact with the external surface of the common upright; l. cantilever means for supporting said extending portion secured to said leg element and said laterally extending portion; m. top structure; and n. a plurality of mating holes in said top structure, said mating holes disposed over said first and second pins for mating with said first and second pins.