Abstract: An apparatus for closing a mold having a pair of mold halves has a housing, a fixed support block on the housing carrying one of the mold halves, an abutment block on the housing, and a support block movable on the housing between the fixed support block and abutment block in a direction toward and away from the fixed block and carrying the other of the mold halves. A frame has at least one plate lying in a vertical plane generally parallel to the axis and formed with a pair of stiff upwardly extending upper arms, a pair of stiff downwardly extending lower arms below the respective upper arms, and an elastically deformable web extending in the direction between the upper arms and the lower arms. Anchors, e.g. bolts, fix one of the upper arms to the fixed support block and the other of the upper arms to the abutment block.

Abstract: An operating parameter of a centrifuge is determined by converting vibration of the machine frame of the centrifuge on rotation of the drum thereof to electrical signals having a frequency spectrum which is analyzed. Variations of the peak amplitudes and frequency locations on frequency analysis, e.g. by Fast Fourier Transmissions, is used to signal the parameter, e.g. a parameter representing the degrees of filling the centrifuge, termination of filtration, etc.

Abstract: An injection-molding apparatus for making a hollow-wall container having sides and a base has front and rear mold parts together forming side surfaces of a mold cavity centered on an axis and a floor mold part defining a base surface of the mold cavity. An inner core sleeve and an outer core sleeve are axially displaceable relative to each other and to the mold parts and have front ends. The sleeves together form a passage extending to the front ends and the front ends form a compartment. A sleeve actuator can displace the sleeves axially between a front position with the front ends of the sleeves projecting relatively far into the cavity and a rear position with the front ends of the sleeves generally retracted from the cavity. A piston/cylinder unit formed between the sleeves connected to the passage is pressurizable to shift the sleeves relative to each other and thereby open up the compartment into the cavity. A floor actuator can axially shift the floor between front and rear positions.

Abstract: A filter centrifuge has the drum, the drum shaft and its bearings mounted in a movable machine support, carriage or bearing member which rides on a rail of the base machine support or frame so that with a cover for an opening in the rear wall on which the filter housing is mounted, the assembly of drum, shaft and bearing can be withdrawn into the machine space. When the movable wall is in place, a clean room containing the filter housing and the processing chamber, is closed off from the machine space.

Abstract: The problem of insufficient friction along the wall of a rotating funnel feeding viscous material to an extruder or injection molding machine so that the material sweeps past the conveying screw and prevents the conveying screw from continuously feeding that mass to the outlet of the funnel, is solved by providing pins which project inwardly from the rotating funnel wall and engage in interruptions in the flight of the conveying screw. The funnel wall can also be provided with pockets or grooves.

Abstract: The extruder screw drive has a first and a second motor, a screw mechanism connected to the first motor and to the extruder screw for translating it in the extrusion cylinder, and a slide mechanism connected to the second motor and to the extruder screw for rotating it in the extrusion cylinder. The screw mechanism and the slide mechanism are coaxial and partially fit into one another to provide an axially compact arrangement. The motors can be hollow shaft electric motors axially aligned together, and pressure regulated hydraulic axial force can be added to the extruder screw during plasticating as it retracts due to increased volume of plastic at an output end of the extrusion cylinder.

Abstract: An aircraft extending along a longitudinal aircraft axis and having a nose wheel pivotal about an upright wheel axis can be maneuvered by a tractor extending along a longitudinal tractor axis and adapted to engage the nose wheel of the aircraft. The tractor and aircraft axes can extend at an angle to each other that should not exceed a predetermined maximum turnout angle. A turnout protection system has structure on the aircraft that is directed generally perpendicular of the aircraft axis and that is only directed toward the tractor when the aircraft and tractor axes extend generally at the maximum turnout angle relative to each other. At least one electronic sensor on the tractor directed toward the aircraft detects the structure when the aircraft and tractor axes extend generally at the maximum turnout angle relative to each other. A controller on the tractor takes action, e.g.

Abstract: An evertable drum centrifuge has a drum with a generally cylindrical and perforate outer wall and having an axially forwardly open front end. An end wall of the drum can move axially between a closed position fitting in the front outer-wall end and an open position spaced axially forward of the outer wall and is centrally formed with a fill opening. An annular liner of a flexible foraminous filter medium has a front edge attached to the outer-wall end and a back edge attached to a rim of extension structure fixed on the end wall. When the end wall move between the closed and open positions, the liner moves from a normal position inside the drum and extending backward from the front end to the rim to an everted position substantially outside the drum and extending forward in the solids compartment from the front end to the rim. An axially displaceable fill tube carries an axially nondisplaceable fill head complementarily engageable in the fill opening and having an annular seal engageable with the fill tube.

Abstract: A device for producing synthetic plastic molded sheets including a mold rotatable about at least one axis and receiving a thermoplastic synthetic resin powder which is sequentially heated and cooled by liquid heating and cooling medium admitted into a hollow chamber of the mold, and a housing formed with a housing wall provided with a plurality of bulges for compensating thermal stresses resulting from different materials of the housing wall and a wall of the chamber.

Abstract: A centrifuge has an upper wall formed with an inspection port, a cover engageable over the port, and an annular seal on the cover compressible against the port in a closed position of the cover. A hinge and operating assembly has a hydraulic cylinder/piston unit having one end pivoted on the housing, at least one pivot lug on the cover defining a cover axis, at least one pivot lug on the housing defining a housing axis parallel to the cover axis, and a support link having one end pivoted on the housing pivot lug at the housing axis and an opposite end defining a support axis. An operating lever centrally pivoted on the opposite end of the support link at the support axis has an end portion extending from the support axis and connected to the opposite end of the hydraulic unit and an opposite end portion on pivoted to one end of an operating link having an opposite end pivoted on the cover lug at the cover axis.

Abstract: A resin article is made between an outer concave mold part and an inner convex mold part that can fit together so that respective surfaces form a substantially closed mold cavity. This is done by first lining the surface of the outer mold part with a liner sheet and then fitting the lined outer mold part to the inner mold part to form the substantially closed mold cavity. A portion of the surface of the inner mold part is positioned to form a pocket open inward into the cavity and this pocket is filled with a mass of fluent synthetic resin. The surface portion is then pressed inward while the parts are fitted together and without otherwise relatively moving the mold parts to force the resin mass from the pocket into the cavity until the inner-part surface portion lies substantially flush with the rest of the inner-part surface.

Abstract: An aircraft towing vehicle including a chassis formed with a recess receiving a towing device for securing a nose wheel of an aircraft and including a transversely tiltable bearing frame, a vertically displaceable and longitudinally swingable lifting cradle provided with a pair of telescopic traction arms having respective gripping devices on respective rearward ends, the arms being longitudinally displaceable and adapted to swing about respective transverse axes, bringing thereby the gripping devices upwardly to engage the circumference of the nose wheel above an axle thereof.

Abstract: A discontinuously operated filter centrifuge has its noninverting filter bag attached only to the filter bottom which is displaceable out of the filter drum, so that when the filter bag is displaced out of the filter drum, a clearance is provided between the filter bag and drum to enable inspection of the interior of the drum.

Abstract: A mold closing apparatus and process for use with an injection molding machine are described. The mold is opened and closed by hydraulic pressure. The disclosed apparatus and method relate to the use of an immobile differential piston within a displaceable, double-action differential piston which moves within an immobile piston cylinder. This arrangement permits the use of smaller diameters to produce the necessary closing force. The immobile differential piston contains the necessary hydraulic passage for routing hydraulic fluid to the appropriate surfaces for exerting opening and closing forces. The use of a plurality of displaceable, single-acting pistons in parallel with the differential piston further reduces the diameters needed for exerting the claim force. Locating these single-acting pistons within the support column cylinders makes for an ever more compact apparatus.

Abstract: A drying apparatus has a generally conical upwardly flared housing having an upper end provided with a cover and a lower end provided with an outlet, a mixing auger mounted on and extending upward from the lower housing end in the housing and rotatable to mix particulate material in the housing, and a magnetron mounted at the upper housing end and directed downward inside the housing to irradiate and heat the particulate material in the housing. The magnetron can be mounted directly on the cover. An adapter ring can be provided on the upper end of the housing between the housing and the cover with the magnetron mounted on this adapter ring. This ring is releasably connected to the cover and housing, and it is possible for the ring to carry a plurality of such magnetrons each provided with a respective coaxial wave guide extending through the ring and into the housing.

Abstract: A synthetic-resin article is molded by plastifying a virgin granulate into a fluent stream and plastifying a recycle granulate into another fluent stream. The recycle stream is then filtered while still plastified to removing particulate impurities from it. Then the filtered recycle stream while still plastified is combined with the virgin stream to form a combined stream and the combined stream is fed into a mold. The stream is mechanically filtered.

Abstract: A mold closing apparatus and process for use with an injection molding machine are described. The mold is opened and closed by hydraulic pressure. The disclosed apparatus and method relate to the use of an immobile differential piston within a displaceable, double-acting differential piston which moves within an immobile piston cylinder. This arrangement permits the use of smaller diameters to produce the necessary closing force. The immobile differential piston comprises the necessary hydraulic passages for routing hydraulic fluid to the appropriate surfaces for exerting opening and closing forces.The use of a plurality of displaceable, single-acting pistons in parallel with the differential piston further reduces the diameters needed for exerting the closing force. Locating these single-acting pistons within the support column cylinders makes for an even more compact apparatus.

Abstract: A mixing device exhibiting a mixing chamber, feed and recirculation lines for components and for the component mixture. A control piston reciprocates inside the mixing chamber between a recirculation position where the feed and recirculation lines are in fluid communication and a mixing position where the components impinge and mix in the mixing chamber. At least one component has a straight line recirculation path from its feed to return line through a radial slot in the control piston. A bypass line branches off from at least one feed line and opens into the mixing chamber at a mixing input duct in the same radial plane as a mixing input duct for a second component.

Abstract: An optical disk having a pair of axially oppositely directed faces and an annular outer periphery is made by first forming a mold cavity corresponding to the shape of the disk between a pair of axially spaced parts and a demolding ring sandwiched between the parts. The cavity is then filled with a hardenable resin such that the parts form the respective faces and an inner periphery of the ring forms the outer periphery of the disk and the resin is at least partially hardened in the cavity. The parts are then axially oppositely separated from each other and from the disk to leave the disk in the ring with both of its faces exposed and the ring is then transversely displaced with the disk engaged in it out from between the mold parts. The disk is then cooled and shrunk such that its outer periphery separates from the inner periphery of the ring and the disk separates from the ring.

Abstract: An optical disk having a pair of axially oppositely directed faces and an annular outer periphery is made by first forming a mold cavity corresponding to the shape of the disk between a pair of axially spaced parts and a demolding ring sandwiched between the parts. The cavity is then filled with a hardenable resin such that the parts form the respective faces and an inner periphery of the ring forms the outer periphery of the disk and the resin is at least partially hardened in the cavity. The parts are then axially oppositely separated from each other and from the disk to leave the disk in the ring with both of its faces exposed and the ring is then transversely displaced with the disk engaged in it out from between the mold parts. The disk is then cooled and shrunk such that its outer periphery separates from the inner periphery of the ring and the disk separates from the ring.