Abstract: An adjustable height coil dispenser includes a carriage assembly having a plurality of wheels, a vertical frame mounted to the carriage assembly, a vertically adjustable forks assembly movably mounted to the frame, a platform mounted to the forks assembly, the frame and the forks assemblies designed to raise and lower the platform, a hydraulic lifting assembly mounted to the carriage assembly, and a coil dispenser device integrated on the platform. In operation, the adjustable height coil dispenser is maneuvered up against a skid of stacked coiled material. The platform is raised to a level just below the top coil on the skid. The top coil of the skid is slid into the dispenser. The dispenser is lowered and the coil is transported to the desired machinery. The height of the coil dispenser device is adjusted as necessary for the particular machinery and the coiled material is fed through the feeding chute into the machinery.

Abstract: An injection molding apparatus which includes a check valve assembly mounted at the forward end of a feed-screw, the valve assembly having forward and rearward valve seat surfaces which co-act in a first position to allow a plasticized polymeric material to enter and flow through the valve into an injection chamber and which co-act in a second position to stop any additional material from entering the valve assembly. The second valve position is effected by a feed-screw injection stroke which generates a back pressure to close the valve, the back pressure moving a check ring of the valve assembly into a position to block entry into the valve. Part of the valve seat surfaces are covered with a plurality of ceramic disks and other valve seat surfaces are covered with a metal alloy which effectively increases the abrasion resistance of the valve seat surfaces and thus also increases the wear service life of the check valve assembly.