Abstract: Apparatus for compacting powdered and fibrous raw materials to a pellet product, comprising a mixing chamber with an inlet, a driven mixing shaft coaxially with respect to the mixing cylinder and which is provided with radially projecting blades. A pelletizer is connected directly to the mixing cylinder, and comprises a cylindrical mold coaxially inside a cylindrical jacket part and provided with radial holes, and inside which are arranged one or more freely rotatable pressure rollers as a result of which, when the apparatus is working, the compacted mixture is pressed through the holes, while the jacket part of the pelletizer is provided with an outlet for the compressed product. The mixing shaft is designed as a cylinder, rotatable coaxially with respect to a fixed supporting shaft.

Abstract: A plurality of polyurethane layers, some of which have a contrasting color with respect to an adjacent layer is formed into a laminate. During preparation, each layer is separately formed, as by spraying, and the contrasting color ensures that the preceding layer can be fully covered. The laminate can be utilized to cover areas or objects which are otherwise difficult to ensure that it has a continuous or complete coating. The invention is suitable for use as a coating and for the preparation of various in situ articles or enclosures, for example a fuel tank, such as commercial and military aircraft.

Abstract: A method and apparatus for controlling induced dynamic instability in an axially moving form supported between two axially spaced supports wherein the form is relatively soft and therefore exposed to development of transverse tensional forces tending to pivot the form about one or both supports. Control is effected by establishing a datum axis, repeatedly sensing the lateral position of the form in at least two mutually inclined transverse directions, deriving signals proportional to the sensed lateral displacement of the form from the datum axis, converting the signals to thrust forces, and applying the thrust forces to restore the form to the desired lateral position. The technique is of particular value in the production of oriented polymeric tubular films.

Abstract: An apparatus for forming a slide fastener chain includes an injection molding machine with a mold, a sprue and runner cutter adjacent the mold, a pelletizer adjacent to the cutter for reducing the sprues and runners to particle size which are delivered to a first hopper, a second hopper for fresh molding materials, a mixing hopper for blending the used and fresh molding materials to be fed to the mold, and controls for regulating the proportions of used and fresh materials.

Abstract: A press molding apparatus and its method of operation for making an information carrier disc which comprises the steps of maintaining a mass of granular transparent synthetic material in a vacuum, radiating heat from an infrared heating unit to plasticize the synthetic material, and press-molding the plasticized synthetic material.

Abstract: A soap press for compressing soap pieces and forming a bar therefrom. The press comprises a press chamber which is secured in fixed relation to a shaft. The chamber receives the soap pieces and is formed by sides and removable top and bottom plates. The edges of the top plate are closely circumscribed during operation by the sides of the chamber. The top plate is movable within the chamber in a direction parallel to the walls thereof. The bottom plate is removably secured across the bottom of the chamber. The press further comprises means to apply pressure to the top plate of the chamber, which consists of an eccentric cam rotatable about an axis. The cam during operation bears against a portion of the top plate and as it rotates about its axis forces the top plate into the press chamber to a predetermined distance, to apply appropriate pressure to soap pieces within the chamber.

Abstract: There is disclosed a mold assembly for casting a concrete wall having an opening and for anchoring a flexible resilient ring-like gasket in the peripheral wall of said opening to make a seal with a pipe passing through the opening. The assembly includes a pair of spaced mold walls for receiving unset concrete therebetween, a flexible resilient annular mold arranged to extend between the mold walls with its end surfaces in respective sealing contact with the inner surfaces of the mold walls and a rigid mold-supporting member removably inserted within the annular mold to support the latter while concrete is cast about the annular mold and between the mold walls. The outer surface of the annular mold has a continuous annular groove, intermediate the end surfaces, to receive the pipe-engaging portion of the gasket. Once the concrete is set, the outer anchoring portion of the gasket is embedded in the concrete.

Abstract: Disclosed is a pneumatically powered automatic apparatus and method for subdividing one or more loaves of dough supported in a partitioned single use, nonmetallic tray at a processing station intermediate the opposite ends of a conveyor. A tray of dough is introduced into the apparatus as a tray of subdivided dough exits onto the conveyor. The dough divider functions to draw the skin of the roll of dough from the upper and lower sides thereof permanently into closely spaced relation between adjacent subdivisions of dough thereby leaving the subdivisions connected solely by a web which is readily frangible when the dough is baked. The dough subdivider operates dry and free of lubricant. Trays of dough exiting from the apparatus are maintained frozen and wrapped until ready for the oven at either a local or a distant consumption site.

Abstract: A process for the production of a multi-layer pipe to be used for formation of a bottle by drawblow-forming, comprising forming by co-extrusion a pipe having inner and outer layers of a polyester composed mainly of ethylene terephthalate units and an intermediate layer of an oxygen-barrier resin interposed between the inner and outer layers. An adhesive resin layer is preferable interposed between every two adjacent layers. The co-extruded multi-layer pipe is sized in the molten state so that the diameter of the pipe is uniform. The process continues by cooling the outer portion of the molten multi-layer pipe by contact with water and simultaneously introducing an inert gas or an inert gas containing a water mist into the interior of the pipe to thereby cool the inner portion of the pipe and prevent oxidation in the pipe. A multi-layer pipe prepared according to this process is excellent in the transparency and the draw-formability into a multi-layer drawn bottle.

Abstract: A lightweight self-sealing flexible door for closing the end of a horizontal coke oven, which door comprises an outer assembly that includes a thin flexible plate and an inner plate assembly that extends into the oven and is supported by the outer assembly. Self adjusting pressure-distributing means associated with the exterior of the flexible plate continuously exert pressure at a plurality of spaced locations adjacent the outer periphery of the flexible plate to cause it to freely flex and urge sealing means adjacent the inner periphery of the flexible plate to substantially sealingly engage the surface of the frame of the oven as the frame is caused to warp and distort by the thermal cycling that occurs during operation of the coke oven. Latching devices hold the door in position against the oven frame and apply pressure upon the pressure-distributing means.

Abstract: A lightweight, flexible oven door for horizontal coke ovens consisting of a thin-walled, flexible sealing plate, door body, a coking plate assembly extending into the oven from the sealing plate door body, knife edges mounted on the inner periphery of the sealing plate door body and adapted to be pressed against the coke oven door frame, and a plurality of flexible pressure-balancing lever systems that cooperate with the door locking bar assemblies and locking hooks. Each of the flexible pressure-balancing lever systems applies pressure at several points along the outer periphery of the sealing plate door body to press the knife edges on the underside thereof against the door frame to seal the oven against the atmosphere. Each of the pressure balancing lever systems includes a plurality of flexibly interconnected levers.

Abstract: A dry coke cooling apparatus comprises an antechamber with a bottom hole for charging coke into a cooling chamber which accommodates vertical outer cooling walls and inner cooling walls which extend within the coke charge. The lower part accommodates coke discharge equipment and conduits for supplying circulated cooling gas which passes upwardly through the charge, to be exhausted at the top. The inner cooling walls are supported on hollow beams which are cooled by the circulated cooling gas directly or indirectly.

Abstract: A steering wheel having the hand wheel part thereof formed of an injection molded foam of thermoplastic synthetic resin, which injection molded foam has a substantially solid outer surface and is covered with a coating. This steering wheel is produced in attractive appearance without requiring use of any specially formulated resin material or exercise of rigid control of molding conditions.

Abstract: An extruder (2) comprising an extruder barrel comprising a plurality of barrel modules (4), each provided with an inner lining material (16), and at least one plate (6) is described. Such an arrangement facilitates assembly and dismantling of the barrel for replacement of inner parts. In a preferred embodiment, a plate (6) having an opening (26) passing therethrough and comprising projections (30) extending into said opening, is interposed between each two adjacent barrel modules (4), the openings of the plates (6) and internal surfaces of the barrel modules forming a substantially continuous passageway which provides an extrusion chamber (3).

Abstract: A variable pitch multi-blade propeller suitable for use on a helicopter is constructed of a foam preform joined with a fibrous spar enclosed in resin-impregnated foils and fitted with a metal leading edge. Various components are assembled in a mold and the resins, then cured. The structure may further include a reinforcing yoke of carbon fiber fabrics preimpregnated with a polymerizable synthetic resin. The process may further include a heat treating step to effect polymerization.

Abstract: A process for annealing drawn polyester filaments with saturated steam of at least about 150 psig provides products with a novel fine structure that results in an improved balance of strength, dyeability, shrinkage, crimpability and trimer in the product.

Abstract: An apparatus and method for quantifying the flow rate of dough by controlling the speed of a feed conveyor when the dough is transferred from the feed conveyor onto a constant-speed conveyor. Dough is weighed and the movement of the feed conveyor is controlled at a speed inversely proportional to the weighed measurements, whereby the dough is stretched or compressed cooperatively with two pressing means to make constant the weight of dough per unit length.

Abstract: An apparatus for the manufacture of fibrous webs comprises a forming wire and a distributor for depositing dry fibers on the wire. The distributor comprises at least one cylindrical chamber having its axis extending transversely of and in a plane parallel to the wire. The lower semicylindrical wall of the chamber is perforate for distributing fibers on the wire and the upper semicylindrical wall includes a fiber inlet. A helically bladed rotor in the chamber has its axis substantially coincident with the chambers axis of curvature, and upon rotation operates to drive fibers through the screen while evenly distributing them across the wire. Disposition of a pair of chambers in tandem with a common central fiber inlet operates further to create a racetrack fiber distribution across the wire.

Abstract: The dough-rolling machine comprises two dough rollers, the upper one being adjustable in height. Two dough-conveyor belts are guided over inner conveyor-belt rollers. Between each of these rollers and the lower dough roller is a measuring roller. The dough is rolled out in several passes, one or the other of the conveyor belts serving alternately as the feed belt. The speed of rotation of the dough rollers is constant, as is the speed of the conveyor belt transporting the dough away from the dough rollers. The speed of the conveyor belt feeding the dough is adjustable and is regulated by means of the measuring roller measuring the actual rate of feed of the dough. Optimum control of this feed rate is important in order to avoid undulation or overstretching of the dough, which can destroy it, necessitate rerolling, or result in excessive rejects. The dough-rolling machine needs no operator.

Abstract: A method of rotationally molding a polymeric article having an abrasion resistant layer. A polymeric outer layer is first formed. Heated abrasive resistant filler, and additional polymer is fed into the mold. The mold continues to rotate until a uniform layer of abrasive resistant filler and polymeric material forms.