Abstract: An adjustable rack construction in which the shelf is supported so that its vertical position and angle of inclination with respect to the vertical can be changed by an operator without using any tools.

Abstract: A container handler for use with an over-and-under conveyor having upper and lower gravity-type roller conveyor sections disposed vertically one above the other. The container handler is disposed directly adjacent the discharged end of the upper conveyor and has a support platform alignable with the upper conveyor so that a container can be discharged from the upper conveyor onto the support platform for engagment with a stop. The front end of support platform, namely the end with the container stop, can be vertically lowered by an operator to facilitate access to the container. The front end can be vertically raised and lowered by a first lifting device and, when the operator is completed with his operations, the first lifting device lowers the front end of the support platform to a lowermost position.

Abstract: A powered roller conveyor wherein a plurality of conveyor rolls are formed as elongated sleeves and are freely rotatably supported on support shafts which are slightly undersized relative to the sleeves. At least some of the support shafts are rotatably driven. The sleeves and support shafts are provided with a special coating on the opposed surfaces thereof so that friction between these surfaces is greatly minimized, whereby a minimal drive force is transmitted from the driving shafts to the sleeves, which minimal driving force is sufficient to effectively convey the articles along the conveyor but results in only minimal pressure on the articles and between the articles when they are stopped and accumulate on the conveyor.