Abstract: A press for molding large sheets around a forming surface which includes an elastic press pad, a first frame member on the side of the press pad away from the working surface thereof, the first frame member having a top wall and side walls forming a pressure cell area therebetween, an elastic diaphragm in the pressure cell area in contact with the press pad, a second frame member formed in a generally L-shaped configuration to encompass and hold an annular bead of the elastic diaphragm, a trough-shaped supporting member positioned adjacent the end walls of the first frame member and the press pad such that a gap is formed between the end walls and the supporting member, a movable seal strip positioned in the gap to prevent the press pad from being pressed out of the pressure cell area when the elastic diaphragm is expanded, and a supporting strip attached to the end walls of the first frame member at a point within the pressure cell area to secure the press pad within the pressure cell area.

Abstract: The present invention relates to counterpressure casting arrangements and may prove to be most advantageous for producing castings which should meet more exacting requirements as to their physicomechanical properties and tightness.Said arrangement comprises a pouring device with a partition plate subdividing it into two chambers, of which the bottom one contains a vessel for the melt, while the top one accommodates a casting die, the arrangement having also a die-casting machine located outside the body of the top chamber and provided with a device for reiterated introduction and withdrawal of the dies, said device being mounted on a transporting device which is made with a possibility of carrying the dies from the die-casting machine to the partition plate of the pouring device and back to said machine.

Abstract: An apparatus and method are disclosed for forming an improved ejection (inner) tube for use in a telescoping tampon applicator. The apparatus and method takes a tubular blank and, in one step, provides an improved ejection tube by forming simultaneously a bead-like rim on one end of the tube, an inwardly turned bearing surface on the other end of the tube, and a plurality of outwardly projecting abutments on the surface of the tube near the bearing surface end thereof.

Abstract: Improved method and apparatus for stripping insulation from the end of the electrical conductor of an insulated wire to expose a predetermined length of the conductor whereby the remaining insulation does not shrink when the wire is subjected to heat. Means, including an improved insulation stripping blade, are provided for compressing the remaining insulation immediately adjacent the exposed end of the conductor and simultaneously heating the remaining insulation immediately adjacent the exposed conductor to cause the adjacent remaining insulation to adhere to the conductor.

Abstract: A casting apparatus in which a stream of molten metal is cast into a casting mold (e.g., an ingot mold) is provided along the stream with a porous refractory body to which supplied droplets of the metal do not adhere. A protective gas, usually nitrogen, is forced through the body to form a curtain or shield around the stream of the melt.

Abstract: An apparatus and process is disclosed for rotational molding. Rotational molding is a technique for the fabrication of parts from powdered thermoplastic material in which the thermoplastic material is placed within a hollow mold and the mold is rotated in a heated environment until the thermoplastic material fuses and coats the entire interior surface of the mold. Included in the apparatus is a holding mechanism for the mold and a power mechanism to provide the required rotational motion to the mold. The power mechanism provides for simultaneous rotation of the mold about two orthogonal axes and is displaced spatially from the holding mechanism. The holding mechanism is attached to a translating mechanism which positions the molds both internal to and external to a heating chamber such as an oven while keeping the drive mechanism external of the oven at all times.

Abstract: Molten steel pouring from a ladle into a tundish is surrounded by a vessel which is pressurized to maintain an excess pressure of an inert gas and/or a gas or vapor of a material that treats the steel, e.g., for deoxidizing, desulfurizing and/or other cleansing action. The excess pressure per se inhibits any reoxidation. Reactant material is fed to the chamber at a rate to maintain the excess pressure and/or to ensure sufficient presence of reacting material commensurate with the amount of steel passing through.

Abstract: A method and apparatus for forming a fiber preform for use in molding fiber-reinforced, plastic articles is disclosed. The apparatus includes a perforated form which is rotated about its longitudinal axis while a vacuum is applied internally. Cutters deposit short lengths of fibers on the rotating form by traversing the form from one end to another, and a binder resin is sprayed onto the fibers as they are deposited. The form is cylindrical and at least a major portion of its sidewall is initially covered with a flexible bellows. As the cutters traverse the form, the bellows is collapsed ahead of the cutters to incrementally expose the perforations. An oven is provided to cure the resin while the preform remains on the form.

Abstract: A longitudinal oscillatory motion is imparted to a rotating shaft of a carbon black pelleter. The movement of the rotating shaft in longitudinal direction varies the paths of the outer ends of the pins radially mounted on the shaft and traveling near the inner wall of the pelleter chamber thus preventing a buildup of carbon black cake on said wall.

Abstract: A table for use in plastic forming machines, the table including a plurality of upstanding tubular support members arranged in a predetermined pattern, a plurality of alternately usable platform members, each such platform member being of a different size to support different vacuum molds and each being mountable on upstanding tubular supports at selected positions on the table. A plastic material clamping frame having readily adjustable side elements for varying the size of the clamping frame is arranged to be selectively positionable, at all variable sizes thereof, to thereby hold the edges of a sheet of plastic material along and beneath the edges of different vacuum forming molds mounted on a platform member supported by the tubular support members at the selected positions thereof.

Abstract: An arrangement for inserting a nozzle unit in a spinning device for spinning synthetic fibers has shafts extending through and movable relative to the opening of the device, means for detachably connecting the first end portion of the shafts to the nozzle unit, and drive means connected to the second end portion of the shafts and operative for pulling the latter. When the nozzle unit is connected to the shafts, and the latter are pulled by the drive means, the nozzle unit enters the opening of the device. The shafts may move vertically or along a curved trajectory. The connecting means may be formed as hooks pivotally connected to the first end portions of the shafts by hinges and engageable with loops mounted on the nozzle unit. Hollow beams filled with a heat-carrying agent are built in a body part of the device. Means for actuating the drive means are located outside the hollow beam, and preferably, below the same.

Abstract: A pellet cooling system including a novel coolant cage construction and operational manner so as to insure the cooling of warm thermoplastic pellets as they emerge from a die head and are cut by rotating knives is disclosed. After cooling, as by entrainment in coolant flows simultaneously directed peripherally about the cage sides and radially across the front face thereof, the pellets are immediately withdrawn from the cage. Additionally, a feature of the coolant cage is the provision of a novel slinger for distributing a coolant flow evenly over its front face.

Abstract: A differential pressure forming machine including a pair of endless, sheet supply chains for supporting a deformable thermoplastic sheet and forwardly advancing the sheet, a heater for heating the thermoplastic sheet, a mold for differential pressure forming a shape in the heated sheet, a drive chain for driving the sheet supply chains, a clutch for selectively coupling and decoupling the drive chain and the supply chains, a pair of pneumatic cylinders mounting reciprocally movable pistons which are coupled to opposite ends of the drive chain for driving the sheet support chains in forward and reverse paths of travel, and control mechanism for operating the clutch and the pistons in timed relation so that the sheet support chains and the sheet are incrementally indexed only when the chain moves in said forward path of travel.

Abstract: Apparatus suitable for protecting a spinneret in a spinneret pack comprises a plate and attaching means connected to the plate suitable for temporarily securing the plate to the spinneret pack so that the plate substantially covers the spinneret face.

Abstract: An apparatus forms substantially rectangular cross sections of foamed material by depositing the foaming mixture in a trough lined with flexible material, moving the flexible material along at a predetermined rate, placing a continuous sheet of porous flexible separating material atop the foam and allowing a plurality of articulated members to rest upon the expanding surface. The articulated members are rigid transverse to the surface of the foamable fluid but are freely movable in horizontal and vertical directions. The articulated members have substantially flat bottoms and, as the expanding foam is drawn under them, the weight and shape cause the foam to assume a rectangular cross section. Once expansion is completed, the separating material is perforated to increase the escape of gas and allow a smooth flat top surface to result.

Abstract: An apparatus for forming a mineral wool fiberboard product is described which includes means for separating mineral wool fibers and means for intimately mixing said fibers with a thermosetting powdered binder, means for entraining said mixture of fibers and binder in an air stream including means for directing said air stream into a mat-forming zone formed by converging upper and lower forming wires, means for exhausting air through said forming wires whereby the fiber and binder mixture is collected as two layers on the forming wires with the two layers becoming consolidated at the nip opening formed between the converging screens, and compacting and heating means whereby the mat of fibers and resins is compacted and cured to form a mineral fiberboard product, said exhaust system behind said screens being adjustable whereby the upper and lower outer layers of fibers and resins initially formed on said screens is comprised of an enriched layer of predominantly fine fibers.

Abstract: A briquetting press roll comprising a cylindrical core having a regular polygonal cross-section and a plurality of equal planar sections around its peripheral surface, each planar section having at least one transverse groove. Secured end-to-end around the peripheral surface of the core are a plurality of removable mold segments, each having a flat bottom surface coterminous with one of the planar sections and an arcuate top working surface, forming a right circular cylinder. The flat bottom surface of each mold segment has at least one transverse groove substantially complementing the transverse groove in the coterminous planar section to form a keyway. Devices for securing the segments to the core and for utilizing the keyways to align and prevent movement of the segments relative to the core peripheral surface are provided.

Abstract: A mold for parts of a building such as the floors, walls, ceilings and roofs mounted on a supporting frame which rests, via a resilient member, on a supporting member through which extend heating tubes provided with heat radiating ribs. The bottom of the mold is the top of the heated space within the supporting member and frame. One or more of the sides of the mold are pivotable from projecting members extending outwardly from the supporting frame and clamping devices are provided to clamp the sides in position and against the floor mold. Columns may be included in the mold and are positioned by suspension members provided on the mold sides. A tile mat for positioning tiles may be placed on the floor of the mold. Reinforcement may also be positioned in the mold. For an outer wall, a layer of concrete followed by a layer of polystyrene foam and an inner layer of a lightweight material may be introduced and cast in succession in the mold. The inner mold sides may be profiled as desired.

Abstract: Casting apparatus including a rotatable turntable, a centrally mounted supply tank with a central filler opening and a plurality of radially extending supply chambers connected to the filler opening. A number of split casting molds, one for each supply chamber, are disposed radially outwardly of the supply chambers, each mold having an independently operable lifting mechanism for opening the mold. Each supply chamber has an outlet nozzle above the full level of the chamber. The volume of each supply chamber is equal to the volume of its associated mold. The filler opening has an indicator to permit observation of the level to which the supply chambers have been filled.

Abstract: An apparatus for melt-spraying thermally sensitive material of low viscosity comprises a heatable multi-screw extruder having intermeshing, self-cleaning screws of specified clearance between the screws and between the screws and the extruder housing, a heatable pump for delivering molten material from the extruder to a heatable atomizer and a spray tank in which the atomizer is located for cooling and solidifying the melt-sprayed material.