Abstract: The nut and bolt connection between bent metal columns and shelves: is easy to assembly because the bolt apertures through the shelf skirts are spaced downwardly from the shelf main planar support surface a distance sufficient to permit easy finger access for the nut; is easy to assembly because the skirt includes a return bend portion forming an upwardly facing nut locking surface to prevent rotation of the nut during assembly; is secure because the skirt is formed of spaced apart walls that will compress and bias the nut, bolt assembly, particularly with an interlocking upper portion of the walls to provide for symmetrical compressions; is secure due to the columns being biased or stressed during assembly to bias the nut and bolt threads; and is strengthened in the column margins by bent portions that also increase safety.

Abstract: The nut and bolt connection between bent metal columns and shelves: is easy to assemble because the bolt apertures through the shelf skirts are spaced downwardly from the shelf main planar support surface a distance sufficient to permit easy finger access for the nut; is easy to assembly because the skirt includes a return bend portion forming an upwardly facing nut locking surface to prevent rotation of the nut during assembly; is secure because the skirt is formed of spaced apart walls that will compress and bias the nut, bolt assembly, particularly with an interlocking upper portion of the walls to provide for symmetrical compressions; is secure due to the columns being biased or stressed during assembly to bias the nut and bolt threads; and is strengthened in the column margins by bent portions that also increase safety.

Abstract: In a plastic molded tote box having one lid or opposed lids that will shingle with other lids in the open position when the box and like boxes are nested, the maximum horizontal dimension for the shingled lids, as measured outwardly from the adjacent box side wall (lid flare), is reduced by tapering the lid rib structure toward the hinge, and/or by tapering the outboard lid skirt toward the hinge, and/or by flaring one or more lid flanges, particularly the inboard flange. The latter two structural features permit increased nesting of the lid side skirts or channels, which in the closed position of the lid overlie the box side walls.

Abstract: The crustacean trap, particularly for a lobster, is molded of separate bottom, opposite side, opposite end and top panels that are thereafter assembled by sliding edge channel joints together for the sides and ends, after which the tops and bottoms are assembled through snap joints. The edge joints are provided with vertically extending channels formed of flanges that permit only vertical assembly or disassembly, and the snap joints for the top and bottom panels are hook-shaped pins received in trapping type apertures to thereafter prevent disassembly of the sides and ends. Crustacean ingress is facilitated and egress inhibited by a funnel formed of molded rigid parallel sides and pivotally adjusted non-parallel sides, with the adjustment being an arcuate array of apertures on the parallel sides to selectively mate with apertures on the non-parallel sides. The parallel sides have cross beams snap assembled to the top and disposed to form a lobster removal opening adjacent the funnel opening.

Abstract: A container has bails movable between three different positions for providing support of an upper container on a lower container at three different levels.

Abstract: One or a series of different size tote boxes may be extended in height by securely fastening a ring on top of it or them, which ring is preferably snapped to the top of the box by opposing hook-shaped tabs or interlocking elements. The ring is of a height to effectively change the height of the box, and if a series of different height boxes are involved, the height of the ring is such as to change a lower height box into a higher box of a size not to be found in the series. By effectively constructing the top of the ring in a manner similar to the top of the box, with respect to interlocking, rings may be stacked one upon another to increase the height of the boxes. Interior partitioning, particularly for circuit boards, is such that spacing between boards may be readily changed in a secure manner. Slotted circuit board holders have edges for insertion in opposed vertical slots, which edges are offset with respect to the plane of symmetry of such holders so that the holder may be removed, rotated 180.degree.

Abstract: A stacking and nesting container, particularly a bakery tray, is provided with bails on two opposed sidewall top edges that are pivotable between a nesting position when the trays may be nested within each other and a stacking position wherein a like tray may have its bottom supported by the bails of a lower tray, and the entire structure is molded of synthetic resin material, without metal parts or separate hinge components. The hinge for the bails is formed by pins molded into the bails and fit within self locking bearing aperature of the sidewalls.

Abstract: Each tray in a plurality of 90 degree nestable and stackable trays is formed with a specific key portion along the upper edge of the end walls and a corresponding specific groove and web structure along the lower edge of the end walls. A first group of trays has a specific key structure different from a second group of the trays, each group of trays having its own key structure. Trays of a first group cannot be stacked in vertical alignment with trays of the second group, since the key structure of the first group is adapted to be received by the web structure of the first group, and not by the web structure of the second group, and vice versa.

Abstract: One or a series of different size tote boxes may be extended in height by securely fastening a ring on top of it or them, which ring is preferably snapped to the top of the box by opposing hook-shaped tabs or interlocking elements. The ring is of a height to effectively change the height of the box, and if a series of different height boxes are involved, the height of the ring is such as to change a lower height box into a higher box of a size not to be found in the series. By effectively constructing the top of the ring in a manner similar to the top of the box, with respect to interlocking, rings may be stacked one upon another to increase the height of the boxes. Interior partitioning, particularly for circuit boards, is such that spacing between boards may be readily changed in a secure manner. Slotted circuit board holders have edges for insertion in opposed vertical slots, which edges are offset with respect to the plane of symmetry of such holders so that the holder may be removed, rotated 180.degree.

Abstract: In a plastic molded tote box having one lid or opposed lids that will shingle with other lids in the open position when the box and like boxes are nested, the maximum horizontal dimension for the shingled lids, as measured outwardly from the adjacent box side wall (lid flare), is reduced by tapering the lid rib structure toward the hinge, and/or by tapering the outboard lid skirt toward the hinge, and/or by flaring one or more lid flanges, particularly the inboard flange. The latter two structural features permit increased nesting of the lid side skirts or channels, which in the closed position of the lid overlie the box side walls.