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 container handling system is provided for the conveyance of containers from one location to another. The system is able to handle palletized containers and operate as an order picking pallet return system. The manual operations involved in loading and unloading the containers with respect to one apparatus of the system are safeguarded from being conducted incorrectly, thereby enabling accident free use of the system under normal operation.

Abstract: A security box for storing, transporting, and selectively viewing papers is disclosed. Interfitting locking structure is provided between the lid and container. Pockets having interior and exterior portions are provided in the side and end walls. The interior portion of the pockets supports opposite ends of dividers, and the exterior of the pockets comprise nesting stops for containers stacked in a nested stack without lids.

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: A guide system or rollerway in a gravity type conveyor which includes a plurality of first and second cylindrical rollers journalled for rotation about axes extending transversely between a pair of elongated rails and disposed at spaced intervals along the rail lengths. The first rollers are load bearing and each includes a resiliently compressible load bearing surface around the outer circumference thereof. The nature of the load bearing surfaces is such that they act as speed control devices for a load. The second rollers are in general alignment with each other along the rail lengths and each includes a generally radial outwardly extending guide flange adapted for engagement by a load conveyed therepassed. The second rollers are smaller in diameter than the first rollers and are normally non-load bearing. When loading of the first rollers reaches some predetermined maximum level, the load bearing surfaces thereof are radially compressed to such an extent that the second rollers become load bearing.