Abstract: A hot passage nozzle system including a manifold block, nozzle plate and one or more sprue bushings. At one end the sprue bushings are screwed into mating receptacles in the manifold block and centered at the exit openings of the material passageways in the block. The other ends of the sprue bushings are centered in the nozzle plate. The sprue bushings have annular grooves adjacent the connection with the manifold block creating points of flexure in order to accommodate dimensional changes due to temperature changes during use, and also to accommodate manufacturing tolerances.

Abstract: A downrigger fishing apparatus having a weighted line pulley in which the upper portion only of the pulley wheel is enclosed by and runs freely in a housing. The housing has an inlet and an outlet for the line and portions that are uniquely formed and related to the pulley wheel in a manner that prevents the line from jamming but at the same time provides sufficient clearance to permit both the pulley wheel and the line to run freely in use.

Abstract: A downrigger fishing apparatus of the type including a standard and a post pivotally attached to the standard, the standard being provided with a stop, and locating means, and adapted to be mounted at a convenient location on a boat, the post being provided with a spring loaded detent and a mounting plate for the weighted-line reel, said detent and said plate being mutually cooperative with said stop in one pivotal position of said post to hold the latter securely but releasably in an operative position, and said plate being additionally coactive with said locating means in an inoperative position of said post to position the same in said inoperative position.

Abstract: A method and apparatus for multiple cavity injection molding which permits individual variation of gate opening time for mold shut-off bushings. The gate pins for the shut-off bushings are controlled by individual double-acting fluid motor, the bushings being fed by a common manifold. Gate opening is thus not dependent upon attainment of a predetermined injection pressure. Closure of the gate for each cavity will permit material to be fed faster to the other cavities. Novel means is provided for securing each gate pin to its actuating cylinder, which minimizes heat transfer to the motor, accommodates expansion of the material manifold and permits gate opening adjustment. The fluid motors are end-mounted on an actuating fluid manifold, allowing close juxtaposition. A cycle counter may be used to control inventory.

Abstract: An injection mold bushing which is mounted on the mold and is adapted for sprueless molding. The construction comprises an inner shank and an outer body between which is mounted a heating element for independently controlling the heat at each gate. The material passage is straight and centrally located, minimizing the likelihood of material collecting and degrading in the passage, and making it simple to clear this passage if material build-up occurs. The location of the heater and insulating construction around the bushing insures that the mold will be uniformly cool relative to the material, minimizing distortion of the molded parts.

Abstract: A self-contained molding machine nozzle which is mountable in the mold die and has optimum material flow and heat control characteristics while reducing repair costs. The nozzle comprises an elongated body having a central passage, and a replaceable exit cap mounted at the forward end of the body, this exit cap carrying a torpedo which guides the material to the exit orifice. An external heater surrounds the body and extends over the cap which is provided with flats to facilitate removal and limit heat transfer. An air gap is provided between the cap and surrounding mold die to prevent undesired chilling of the tip by the cooled die.

Abstract: A machine nozzle attached to the barrel of an injection molding machine. The nozzle comprises a body having a central passage and surrounded by a coiled electric heater extending substantially the full length of the body. A cover surrounds the heater, and a removable retainer is attached to the end of the body, so that the heater may be easily removed and replaced. The new construction eliminates problems inherent in previous machine nozzles and is capable of accurate temperature control so as to improve molding quality.

Abstract: An internally heated injection molding machine nozzle which permits heater removal and replacement without the necessity of removing the nozzle from the mold. The nozzle also reduces inventory requirements by having interchangeable components. The nozzle comprises a shank housing with interchangeable shanks and bodies mounted at the forward end and a removable cap at the rearward end together with a heater retaining plug. The heater may be removed from the rear merely by removing the cap and plug while the nozzle is still mounted in the mold.

Abstract: A machine and method for injecting structural foam or other thermoplastic materials into one or more mold cavities. The machine comprises at least one mold-mounted shut-off bushing having a material delivery chamber formed between an outer body and a shank, with a shut-off pin slidably mounted in the shank, a heater being disposed between the pin and shank so as to heat the material passage as well as the shut-off pin tip. Closing of the shut-off bushings is independent of material pressures and is carried out from the space between a mold half and its platen by a cylinder operated cam rod.