Abstract: A pump for boosting pressure of liquid color for injection into plastic resin in molding or extrusion apparatus includes a housing having a first bore extending in a first direction and second and third bores extending through the housing and communicating with the first bore proximate a first end of the first bore with the first end of the first bore being blind. The pump further includes an inlet check valve connectable to the second bore for permitting liquid flow through the second bore into the first bore. Further included is an outlet check valve connective to the third bore for permitting liquid flow out of the first bore through the third bore. A member is reciprocally axially movable within the first bore. A solenoid applies air pulses to the end of the first member facing oppositely from the blind end of the first bore.

Abstract: Apparatus and methods for delivering liquid color to a plastic resin processing machine include a scale for weighing a container of liquid color, a pump for removing liquid color from the container, controller for actuating pushers in the pump in a sequence whereby a first pusher is displaced to squeeze the delivery tube while a second and third pusher are not displaced thereby permitting liquid color to flow through the tube from the supply to a first position of tube squeezing, whereupon a second pusher is displaced to squeeze the tube and substantially trapped liquid color in the tube at the first and second position of tube squeezing, whereupon the first pusher permits liquid color to flow through the tube pass the first position of tube squeezing and the third pusher squeezes the tube and thereby forces at least a portion of the trapped liquid color material through the tube pass the first position of tube squeezing thereby supplying liquid color to the plastic resin processing machine at a predetermined

Abstract: Apparatus and method for recapturing and reusing heat provided in the course of fabricating a molded product.

Abstract: The present invention relates to a vacuum loader assembly wherein the assembly is comprised of a frame, a first and second tube, a flexible tube, a motor, and a sweeper assembly. The frame is adapted to be positioned over an opening of the container. The first tube is mounted to the frame and is in fluid communication with a vacuum source. The second tube is rotatably mounted to the first tube and is also in fluid communication with the first tube and the sweeper assembly is mounted to the second tube. The flexible tube extends from the second tube such that, when the frame of the present invention is placed over a container, the second tube, flexible tube, and sweeper assembly are lowered into the container and rotated by the motor such that, when the vacuum source is activated, the flexible tube suctions out the contents of the container.

Abstract: An accumulator having an internal valve opened by applying air pressure to a diaphragm with a small solenoid to apply air to the diaphragm where the air is supplied from a pilot air supply. When the internal valve operated by the diaphragm opens, it snaps to a fully open position thereby opening the valve and uncovering a passageway leading to a filter for cleaning. The passageway is sufficiently wide that the resulting flow of air through the passageway is so explosive that air pressure on the filter is distributed over the surface area of the filter for a brief moment, blowing the dust on the filter free.

Abstract: A container of liquid color material has a diaphragm liquid color pump located therewithin for providing liquid color from the container and non-drip apparatus for releaseably connecting the container with a blender for supply of liquid color thereto and methods for pumping and supplying liquid color incorporating the same.

Abstract: A container of liquid color material has a diaphragm liquid color pump located therewithin for providing liquid color from the container and non-drip apparatus for releaseably connecting the container with a blender for supply of liquid color thereto and methods for pumping and supplying liquid color incorporating the same. In some embodiments a volumetric controller is utilized for driving and regulating the pump.

Abstract: A vacuum dryer and method for drying granular or powdery material including at least one canister for holding said material being movable among a series of locations including material heating and vacuum drying locations, means for moving said canister among said locations, and means for directing heating air to a canister for delivery to said canister at a selected position on said canister for heated air passage though material in said canister in a selected direction corresponding to the selected position at which said heated air is delivered to said canister.

Abstract: A liquid color pumping includes a housing, a plurality of pushers within the housing, a deformable tube for transporting liquid color from the supply thereof to where the liquid color will be used with the tube being positionably removable in the housing at a location at which of the pushers when displaced squeeze the tube positioning of the pushers resulting in the pushers serially contacting the tube when displaced and the controller repeated actuating the pushers in sequence to draw liquid color into the pumping zone and then to force liquid color out of the pumping zone through the tube at increased pressure.

Abstract: A pump for boosting pressure of liquid color for injection into plastic resin in molding or extrusion apparatus includes a housing having a first bore extending in a first direction and second and third bores extending through the housing and communicating with the first bore proximate a first end of the first bore with the first end of the first bore being blind. The pump further includes an inlet check valve connectable to the second bore for permitting liquid flow through the second bore into the first bore. Further included is an outlet check valve connective to the third bore for permitting liquid flow out of the first bore through the third bore. A member is reciprocally axially movable within the first bore. A solenoid applies air pulses to the end of the first member facing oppositely from the blind end of the first bore.

Abstract: Apparatus and methods for delivering liquid color to a plastic resin processing machine include a scale for weighing a container of liquid color, a pump for removing liquid color from the container, controller for actuating pushers in the pump in a sequence whereby a first pusher is displaced to squeeze the delivery tube while a second and third pusher are not displaced thereby permitting liquid color to flow through the tube from the supply to a first position of tube squeezing, whereupon a second pusher is displaced to squeeze the tube and substantially trapped liquid color in the tube at the first and second position of tube squeezing, whereupon the first pusher permits liquid color to flow through the tube pass the first position of tube squeezing and the third pusher squeezes the tube and thereby forces at least a portion of the trapped liquid color material through the tube pass the first position of tube squeezing thereby supplying liquid color to the plastic resin processing machine at a predetermined

Abstract: A gravimetric blender has a frame, at least one material storage hopper at the top of the frame including a hopper cover, a weigh bin located within the frame, below the hopper, for receipt of material from the hopper to be weighed and being adapted for downward discharge of the material in the bio bin after the material received from the hopper has been weighed, at least one load cell connecting the weigh bin to the frame for sensing the weight of contents of the weigh bin, a mixer within the frame below the hopper, for mixing material weighed in the weigh bin after that material falls downwardly from the weigh bin to the mixer, and a guide adapted for vertical movement of the hopper cover therealong between positions which the cover contacts and thereby closes the hopper and at which the cover is spaced vertically above the hopper so that the hopper is open at the top.

Abstract: A low pressure dryer for granular or powdery material includes a plurality of canisters rotatable about a common vertical axis serially among material heating, vacuum drying and material inventory discharge positions; pneumatic piston-cylinder means for rotating the canisters about said axis among said heating, vacuum drying and inventory discharge positions; means for heating contents of a canister at said heating position; means for sealing and drawing vacuum within a canister at said vacuum drying position and means for selectably permitting downward flow of dried granular or powdery material out of a canister at said discharge position where said canisters move collectively and unitarily one with another.

Abstract: Apparatus for providing granular material to a loading hopper preparatory to processing includes a receptacle receiving material prior to processing thereof by machinery supplied by the hopper with a top including a first valve for selectably connecting the receptacle to vacuum or ambient air, a conduit for drawing vacuum in the receptacle, a conduit for connecting the receptacle to a supply of the granular material, a second valve for selectably permitting material flow from the receptacle into the hopper, and a sensor control for temporarily adjustably closing the first valve and opening the second valve responsively to detected presence of a suitable amount of material in the receptacle.

Abstract: A container of liquid color material has a diaphragm liquid color pump located therewithin for providing liquid color from the container and non-drip apparatus for releaseably connecting the container with a blender for supply of liquid color thereto and methods for pumping and supplying liquid color incorporating the same.

Abstract: A method for granulating previously molded and/or waste solid thermoplastic material for recycling, by introducing the previously molded and/or waste solid thermoplastic material into a laterally bounded granulating zone, performing cutting proximate the bottom of the granulating zone, and sweeping the previously molded and/or waste thermoplastic material within the cutting zone across the location where the cutting is performed by moving the lateral boundary over the cutting area while permitting sufficiently small cut portions of the previously molded and/or waste solid thermoplastic material to pass between the cutter and a surface defining a bottom portion of the laterally-bounded cutting zone.

Abstract: A valve for downwardly dispensing a precisely controlled flow of granular material from a material storage device has a discharge orifice proximate a lower extremity thereof and includes an axially reciprocable tubular member aligned with and slidable axially upwardly and downwardly within the orifice, having a lateral material intake port formed therein remote from vertical extremities of the member, a lower end member being open to define a discharge orifice for granular material dispensed therby, a chamber at least partially surrounding the tubular member, having an open lower end confronting and spaced above the orifice, the chamber open end affording flow of material from the storage device through the port and into the tubular member when the tubular member is at a first position below the open end, the port being spaced upwardly from the open end when the tubular member is at a second position and a pneumatic piston for moving the tubular member axially between the first and second positions.

Abstract: A valve for dispensing granular material from a material storage device having a discharge orifice comprising a member reciprocally resident within the orifice over at least a portion of the reciprocal stroke, the member having an aperture therein remote from the extremities of the member, one end of the member defining a discharge orifice for granular material dispensed thereby, a skirt at least partially surrounding the member, having an opening formed therein and communicating with the member aperture when the member is at a first position in a range of reciprocating travel, the opening and the aperture being displaced from one another and hence in non-communicative relationship when the member is at a second position in the range of travel, and a piston-cylinder combination for vertically moving the tubular member within the range.

Abstract: A gravimetric blender of a reduced size mounted to be directly over the feed trough of small molding machines or extruders. The blender has an upright hollow rectangular frame with a transparent panel. The top of the frame forms a cradle for removably supporting a plurality of hoppers having a bottom discharge controlled by a valve mechanism. The valve mechanism is mounted on each hopper and is connected to a control station having a quick-disconnect fitting on the hopper. The hoppers discharge sequentially into a weigh bin supported on a load cell connected to the control station of the blender. The weigh bin has an openable bottom portion pivotally mounted thereon for actuation by the control station when the appropriate weight is registered by the load cell. The weigh bin discharges into a mixing chamber having an agitator or mixer removably mounted therein.

Abstract: Apparatus for providing granular material to a loading hopper preparatory to processing includes a receptacle receiving material prior to processing thereof by machinery supplied by the hopper with a top including a first valve for selectably connecting the receptacle to vacuum or ambient air, a conduit for drawing vacuum in the receptacle, a conduit for connecting the receptacle to a supply of the granular material, a second valve for selectably permitting material flow from the receptacle into the hopper, and a sensor control for temporarily adjustably closing the first valve and opening the second valve responsively to detected presence of a suitable amount of material in the receptacle.