Abstract: An extruder screw and a method for extrusion to achieve high output rates with thermally sensitive plastic materials and without thermal degradation problems involving the use of a single flight metering type extruder screw having an initial feed zone, distal metering zone, and a transition zone interconnecting the feed and metering zones. In particular, improvements in the extrusion of thermally sensitive plastics such as PVC are achieved through use of a compression ratio of approximately 2:1, a constant lead and pitch, and a proportioning of the length of the feed zone, transition zone, and metering zone relative to the total length of the zones of 27-33%, 23-25%, and 45-48%, respectively. To achieve cooler and more uniform mixing with rigid PVC, polyethylene and like materials, an improved arrangement for using rings of mixing pins is provided.

Abstract: An extrusion blow molding apparatus of the type having a parison tube extruder and at least one blowing station for producing a dual-compartment container as an improvement for increasing the rate at which containers can be produced, wherein a cooling liquid is circulated through a pair of blow pins in a manner creating a zone of highest cooling effect at a tip portion of the blow pins for internally cooling a portion of the parison formed into pouring openings of the dual-compartment container. The zone of highest cooling effect is produced, in accordance with a preferred embodiment, through the provision of a blow pin assembly having an inner tube through which inflation air is blown into a parison, an outer sleeve positioned around the inner tube, and a tip element mounted in a position overlying an air outlet end of the inner tube. A blow port in the tip element communicates with an air outlet of the inner tube.

Abstract: An adaptor assembly that is designed to enable pumping of liquids, such as fuel, from large capacity drums of the type having openings that are sealable by a threaded bung-type closure; pouring of liquids, such as fuel, from military-type Jerry Cans; pumping of liquids, such as fuel, from military-type Jerry Cans; and pumping of fuels from small capacity commercial-type containers of the type designed to receive internally threaded closure caps. The adaptor assembly, in accordance with a preferred embodiment, comprises a large diameter container cap that is designed for mating with a standardized container opening and a small diameter coupling cap, and for slideably and detachably receiving a tubular spout. The coupling cap carries a pump connector and a tubing connector projecting from each of top and bottom sides thereof, and to which flexible tubing is coupled.

Abstract: A stackable plastic container has a unitarily formed handle on a top surface thereof. In accordance with a first feature, the top wall is provided with a pair of upwardly projecting portions that are asymmetrically disposed relative to a center line extending across the container and between which the handle extends. The bottom portion is provided with supporting and stacking nubs that are situated at positions corresponding to the projecting top wall portions, and the top wall portions have nub-receiving stacking recesses positioned on opposite sides of the handle so as to enable stacking of a like container on the container by engagement of supporting and stacking nubs of the like container in the stacking recesses of the container.

Abstract: A drainer container and funnel having a container with an elongated internal receiving chamber that is defined by a pair of opposed major walls and at least one minor wall that interconnects the major walls, and a funnel that is detachably attachable to one of the major walls. The wall to which the funnel is attached is provided with an inwardly recessed funnel receiving wall portion and an aperture therethrough at an innermost part thereof. The funnel has a spout portion that is detachably connected to the recessed wall portion in such a manner as to communicate with the internal chamber of the container through the aperture, and the funnel being of a size and shape so as to be substantially entirely received within the recessed wall portion of the container when connected thereto. When the funnel is detached, a closure seals the aperture in the recessed wall portion.

Abstract: A method for blow molding of containers with a thickened bead at the bottom end thereof by the steps of extruding a tubular parison, closing the mold thereabout, preblowing the parison within a mold cavity under low pressure so as to partially inflate the parison to a major extent, raising the bottom wall of the mold cavity so as to contact the partially inflated parison in a manner forming a thickened bead between bottom and surrounding adjacent mold cavity wall parts, and thereafter finish-blowing the parison within the mold cavity with a blow medium under high pressure so as to inflate the parison to the intended finished size before opening of the mold for removal of the container.