Abstract:
A plastic nesting and stacking case in the form of an opentopped integrally molded rectangular unit having a pair of first opposed side walls, a pair of second opposed side walls and a bottom wall, comprises an upper part with its walls normal to said bottom wall, an intermediate part slightly tapering inwardly and having a height equal to a substantial fraction of the height of said upper part, and a lower part having a height equal to said upper part and tapering slightly inwardly towards the bottom wall of the case. The upper edge of the lower part has an outwardly projecting flange, whereby to enable partial nesting of a first case in a second similar case by the flange of the former resting upon the top edge of the latter. A pair of retractible supporting frames rotatively mounted upon the top of the cases serve to enable stacking of a number of cases with the bottom wall of one case resting upon the supporting frames of the case below in the stack.
Abstract:
An integrally molded oblong rectangular plastic transport case having a length-to-width ratio greater than 1 and less than 1.5 has its bottom wall formed with two rows of three spaced and aligned framelike outward extensions each, said rows being symmetrical to the lengthwise center line of said wall, to provide a single lengthwise channel intersected by two crosswise channels of a width in excess of twice the width of the upper edges of the side and end walls of the case. The center lines of each of the crosswise channels are spaced from the short sides of said bottom wall such as to enable crosswise stacking and mutual interlock of tiers each including a plurality of cases. The spaces within the extensions near the corners of said bottom wall include gridlike structures flush with their outer surfaces, to provide discrete bearing surfaces for the wheels of a gravity conveyor used for loading and unloading of the cases.
Abstract:
An integrally molded high-impact plastic carrying and stacking case, having first and second pairs of opposed vertical walls and a bottom wall, is fitted with a hinged cover comprised of two equal-sized rectangular molded panels spaced from the inner top edges of the vertical walls and occupying the inner space enclosed by said walls in the horizontal and closed position. The panels are provided at their edges adjoining the vertical walls of one of said pairs and parallel to the inner meeting edges of the panels with pairs of spaced upwardly and angularly outwardly extending lugs projecting into corresponding vertical slots in the top edges of the adjacent vertical walls and connected thereto by hinge joints integrally molded with the respective slots and lugs.