Abstract: Apparatus for automatically mixing dry powder supplied in a quantity determined by a size of a pair of dental molds with liquid to form a slurry, dispensing the slurry to the dental molds and for cleaning the apparatus after the slurry has been dispensed comprises a mixing chamber, a movable dispensing chute to selectively deliver the slurry to the molds and to position the chute over a drain for cleaning, a timer circuit for measuring the amount of liquid supplied to correspond with the amount of the dry powder used, for apportioning the slurry between the two molds and for controlling the supply of liquid for cleaning the apparatus.

Abstract: A plastic injection machine injects at an initial higher pressure, with the opening of the injection nozzle valve being delayed to allow injection pressure to build up. When the mold is filled, the pressure applied by the machine is shifted to a low holding pressure which is maintained until the plastic beings to set up. A shouldered bronze thrust bearing transmits the high pressure from the hydraulic injection cylinders to the injection machine screw.

Abstract: A process and apparatus for prilling pharmaceuticals and the like. A mixture supply device provides a melted mixture of a pharmaceutical and a vehicle at a preselected pressure and at a temperature less than the decomposition temperature of the pharmaceutical, such vehicle being solid at normal room temperature. One or more guns receive the melted mixture. A pulse generator provides a train of pulses of preselected frequency and width which through a transducer causes a valve in each gun to periodically open at a frequency and for a duration controlled by the pulse frequency and width. Each gun has a nozzle supplying melted material upon opening of the corresponding valve and from which is ejected a series of spaced droplets of melt mixture at the pulse frequency, which droplets are of size controlled by the pulse width.

Abstract: An automated molding apparatus has a continuous movable belt trained about a pair of spaced apart sprocket pulleys rotatably mounted to a main support frame. A plurality of female dies are equidistantly mounted to the belt for mating with a plurality of male dies reciprocatively mounted in a plane above the female dies. A heated feeder is provided for introducing a predetermined amount of melted mix into the female dies prior to mating with the male dies. To insure that the resulting molded product is properly hardened, the female dies are adapted with internal channels connected to a liquid cooling system. The molding apparatus is readily adaptable for hydraulic operation and may be readily automated by an electrically actuated control and timing system.

Abstract: A machine and method are disclosed whereby multiple casting units simultaneously produce foamed-plastic tubular articles which may be of different shapes and sizes. All units are served from a single supply of foamable material, and in each unit rotation of an annular mold develops a homogenous longitudinal and radial distribution of foaming plastic. The foaming plastic is introduced into each mold rotation, the cavity being closed to permit foamed filling of the mold, and a polymerizing cure is effected prior to mold opening and product removal. The particular machine herein described includes provision for coordinated shot size for foamable material into each of the plural mold cavities, whereby regardless of the mold-cavity size at particular casting units, the shot size (of foamable plastic material) is automatically determined, for uniform or predetermined density in the ultimate products regardless of size variation produced at the respective casting units.

Abstract: Apparatus for forming concrete building blocks which is constructed and arranged (1) to minimize sound emissions to the environment of a magnitude which might cause injury to the hearing of the operators, (2) to provide shielding around the major movable components of the machine so as to substantially eliminate potential causes of bodily injury to the operators, and (3) to improve the performance and cooperation of the major components for making concrete blocks. To provide shielding against noise and bodily injury, the frame of the apparatus is constructed in conjunction with sound insulation panels to provide an enclosure around the major movable components of the apparatus, and the frame also supports these components on internal surfaces thereof so as to minimize sound transmission openings to the environment.

Abstract: Apparatus for extruding and cutting potato dough in the process of making French Fries uses a motor-driven ram which is allowed to recede after an extrusion operation to allow compressive forces in the dough container to be relieved after which a brake may be applied. The length of extrusion is established by time or by interrupting a beam to a photocell. In a modification, extrusion begins only after a predetermined pressure is first achieved in the dough container. The dough container is of special construction allowing both mixing and subsequent dispensing.

Abstract: This invention decreases the time of an injection molding machine cycle by cutting off communication between the mold and the source of material as soon as injection is complete, and accumulating material for the next charge during the cooling part of the cycle. Pressure is maintained on the material in the mold, and material is supplied to compensate cooling shrinkage, from an auxiliary cylinder in which a minor amount of hot material is accumulated. After sufficient cooling, runner material is drawn back by suction of the auxiliary cylinder. A three-way valve cuts off the main material supply and puts the auxiliary cylinder in communication with the mold.