Abstract: An apparatus and method are disclosed which greatly facilitate molding of plastic material in the form of structural foam. The invention contemplates the provision of a valve-like mixing nozzle assembly which is selectively operable to control the flow of plastic material into an injection mold. Significantly, the nozzle assembly includes a mixing turbine rotatably mounted in the flow path of the plastic material. Notably, the turbine is driven by the plastic material itself as the material is driven into the mold assembly, and thus desirably provides intense mixing of the material during injection. This mixing action can be advantageously employed for effecting dispersion and/or expansion of the blowing agent carried by the plastic material for greatly enhanced control and flexibility in molding structural foam articles.
Abstract: A storage unit is provided that may be assembled with other similar storage units in a vertical and horizontal array. Each storage unit comprises material molded to form a pair of opposed walls, a rear wall, a bottom wall, and a top wall together defining a generally box-like structure having an open front. A movable closure panel is provided for closing the front of the unit and is adapted to be stored in a horizontal position within the unit underneath of the top wall of the unit. Various types of receptacles are provided for being disposed within the unit and are adapted to be pulled outwardly from the unit to permit loading and unloading of the receptacles. The receptacles may also be removed entirely from the storage unit. Clip devices are provided for holding the adjacent storage units together.
Abstract: An injection molded, foam plastic, knockdown display stand and shelf support. The display stand is formed from a set of shelves supported by a unique pair of interlocking complementary V-shaped shelf supports. The shelf supports and shelves are indexed to a central pole. The pole is joined to a base support. Each of the V-shaped shelf supports is identical. Each V-shaped shelf support defines edges for supporting the shelves and contains hooks for joining the shelf support to the pole. Several variations of hooks are described. The shelf supports can be used independently of the display stand to support multiple tiers of shelves.
Abstract: An injection molded, foam plastic, knock-down display stand. The display stand is formed from two major components. A V-shaped longitudinal member supports the shelves. The shelf supports have a number of open ended parallel slots. Joining two shelf supports together forms an X-shaped, free-standing shelf support column. Each shelf has an X-shaped opening to receive the shelf support column. Rotating the shelf through the slots joins the shelf to the shelf support column. Integral camming surfaces on the shelves lock the shelves and the shelf supports together to form a substantially erect display stand.
Abstract: A plastic conduit for protecting and directing electrical and telephone cables, employing elongated barrel portions with lipped ends and a snap-on coupling collar. Partition walls intergral with the conduit walls are used to divide the internal passageway of the conduit section. The partition walls are contoured at each end to interlock with the ends of adjacent conduit sections to provide column-like support. Gasketed ends seal the joint between the conduit section and coupling collar. Flanged ends index the coupling collar and limit axial movement and deflection. Interrupted peripheral lips and an interrupted annulus within the coupling collar provide for differential flaring out of the collar ends and corresponding necking-in of the conduit ends as the two are telescoped together. The lipped edges are received within the annulus of the coupling collar and snap fit into position. The snap fitting lips lock the conduit section to the coupling collar.
Abstract: A plastic conduit section of the bell and spigot variety for protecting electrical and communications cable, featuring paired, parallel, ridged spigots or channeled spigots, slotted bells, and resilient tie rods or keys to join adjacent conduit sections together. Interrupted peripheral keyways and resilient keys are used to join adjacent conduit sections together. These conduit sections may be internally divided into smaller subcompartments. A circumferential gasket seals the joint between the spigot and the bell ends. Flanged end surfaces limit axial movement and deflection. Lipped ends index and seat adjacent conduit sections for subsequent joining.