Abstract: The invention disclosed is for a method and apparatus for blow molding foam walled plastic using a quadrisectional mold. A parison of foamed plastic may be blow molded to assume the contour of the closed mold, after which the molded shape is severed into two portions and ejected. Desirably, cellular plastic is blow molded to form hot drink cups.

Abstract: A lift device particularly suitable for lifting handicapped persons with or without wheel chairs into a vehicle or building. The lift can be incorporated into the doorway of any given vehicle, or into any step structure within a building. The lift in its stowed position forms the normal steps. The various step elements are moveable and can cooperate to form a platform which can be lowered or raised to any position between the upper and lower level of the steps. A ramp normally hidden under the steps slides forward to allow easy access to the extended platform and a safety flap housed in the ramp flips upward to form an angle stop preventing the wheel chair from rolling backward during platform motion.

Abstract: Method and apparatus for transferring semi-conductor discs to and from a slab-form quartz boat which apparatus includes a carrier having a pair of hingedly attached shells having a plurality of opposed slots; the method including the receiving and discharge of discs by and from the slots in the carrier, into and from cooperative slots in the said quartz boat by the pivotal opening and closing of the shells of the carrier.

Abstract: Improved methods and apparatus for positive displacement casting and/or for positive displacement bonding and, more particularly, for automatically forming, on a continuous, reproducible basis, fusion bonds devoid of structural, electrical and cosmetic defects between two or more workpieces by moving a heated electrode into the area to be bonded so as to uniformly heat and melt the portions of the workpieces to be bonded while, at the same time, displacing substantially all of the molten material from the area to be bonded into a storage area or reservoir surrounding the heated electrode where such molten material is maintained in its uniformly heated molten state, and then retracting the electrode so as to permit the molten material to return to the cavity formed by the electrode in the workpieces where such molten material is allowed to cool and solidify, thus forming a flawless bond between the workpieces--thermal or fusion bonds are made in accordance with the methods of the invention and with the apparat

Abstract: In an injection moulding machine, the mould closure unit and injection unit are mounted on two arms articulated about a central pivot and each resting on the machine frame at a bearing point, the spacing of which is variable, the arms being relatively movable between a position for injection centrally of the mould and in which the arms are in extension one of the other, and a position for injection in the joint plane of the mould and in which the arms are substantially perpendicular to one another, the joint plane including the axis of the central pivot.

Abstract: An injection mold includes a stationary platen carrying a pair of stationary die sections, a movable platen carrying a pair of movable die sections, and a pair of floating die sections disposed between the movable and stationary die sections. The respective floating and stationary die sections are mutually configured to define a pair of die cavities which are arranged for alternate communication with an injector unit. The floating die sections are selectively connectable to their associated movable and stationary die sections to expose one of the die cavities for article ejection, while maintaining the other die cavity closed for continuing a curing stage.

Abstract: A mold gate has a conduit formed therein for the flow of fluid moldable plastic material; the conduit for the most part is maintained at a relatively low temperature while a portion of such conduit is exposed to be acted upon by a source of higher temperature; the portion of such conduit so exposed to higher temperature is positioned as to be in at least close proximity to an associated mold cavity.

Abstract: In the step of plastic encapsulation of a semiconductive device, the inner ends of a group of leads comprising part of a lead frame, the semiconductive chip and the connections between the chip and the inner ends of the leads, are put into a cavity of a mold and fluid encapsulating material is forced into the cavity to surround the elements that are in the cavity with encapsulating material. A lead frame, which may be supplied in strip form, is provided, a part of which is so formed as to act as a gate for the admission of fluid encapsulating material into the mold cavity.

Abstract: An apparatus for folding a sheet of relatively brittle material in which an articulated frame assembly is mounted relative to a support structure in a manner so that two portions of the frame assembly can pivot relative to each other in an angular direction to fold the sheet about a fold line intermediate the ends of the sheet. Each portion of the frame assembly includes a movable portion which is adapted to fold the outer end portion of the sheet about an additional fold line intermediate the first fold lines and the outer edge portion. The sheet is heated along the fold lines prior to the folding operations.

Abstract: A machine for producing hollow plastic articles having a housing with a pair of parallel spaced-apart longitudinal guide rails, a stationary extruder head mounted between the parallel guide rails, at least one blow mold closing unit slidably supported on each of the guide rails for supporting a blow mold, an inclinded guide formed on each closing unit defining an inclined path directed toward the extruder head, means for moving each of the units along the guide rails adjacent to the extruder heads and a further means for urging the molds along the inclined path into contact with the extruder at selected time intervals. A controlling unit is also provided so that one, two, three or four molds can be operated in sequence. Means are also provided to open each of the mold halves just prior to the molds contacting the extruder head so that the hollow plastic articles can be removed, trimmed and collected.

Abstract: A device for producing gilled pipes of plastic or other extrudable material, the device comprising two sets of mold jaw halves arranged on an endless line, one set running in a clockwise direction and the other set running in a counterclockwise direction, said mold jaw halves being brought to run close one to the other between a fixed groove shaped guiding rail and a parallel spring-biased guiding rail to define an entrance and an outlet, a nozzle is provided at the entrance and is capable of feeding material to be extruded thereto.

Abstract: This invention consists of a combined rolling pin and dough cutter. It is made up mainly of a central shaft provided with a handle at each end, and a series of abutting cylindrical rollers, all of the same diameter, rotate freely upon the central shaft to function as a rolling pin. To perform as a dough cutter, a series of circular cutting discs are inserted between the rollers. These discs are of a larger diameter than the rollers, so that their cutting edge extends beyond said rollers. One handle of the shaft is permanently fixed to the shaft while the other handle unscrews from the shaft to allow the insertion of the rollers and discs. One of the handles of the shaft is bored with a longitudinal hole into which is inserted a center pin which is used for cutting circular sections of dough used in pie making.

Abstract: An apparatus for producing a double-walled tube of plastic material having an outer corrugated wall and an inner wall connected to the inner crests of the corrugated outer wall, in which an extrusion head is arranged coaxially within mold means formed by a plurality of mold sections traveling along endless paths and abutting along portions of the paths against each other to form a tubular mold having an inner corrugated surface. The injection head comprises two coaxially arranged annular extrusion nozzles having outlet ends axially spaced from each other through which plastic material is extruded.

Abstract: A method and apparatus for the production of plastic containers, especially injection blow molded containers having a preformed inner lining which is applied to the blow core prior to formation of the composite parison. The temperature of the blow core is adjusted prior to application of the lining so that it is suitable for receiving and heating said lining.

Abstract: A machine for the manufacture of twisted pastry bars comprises coplanar and spaced-apart supply and discharge belts, the supply belt being advanced intermittently to convey a strip of dough to a cutting station where the strip is cut into successive, transversely extending ribbons. Pairs of facing upper and lower conveyor belts are positioned between the supply and discharge belts, the conveyor belts defining therebetween a coplanar bed for conveying the successive ribbons to the discharge belt which supports and removes the twisted bars. While the ribbons are entrained by the facing conveyor belts, they are gripped at spaced positions against transverse displacement.

Abstract: A structure is described which consists of a corrugated and a flat sheet or film of thermoplastic material, which sheets are positively connected by matching depressions with undercuts arranged along the grooves of the corrugated sheet and at corresponding points of the flat sheets. The structure is especially suited to make inserts for trickling-filter towers.

Abstract: Foldable chute is arranged below the mold members of a molding machine to receive the molded product dropped from the machine when the mold members separate. Means are provided for deflecting the dropped molded product to control the position in which it drops on the chute.

Abstract: A method for fastening by brazing (hard-soldering) the blades of a rotor for a hydrodynamic torque converter or the like, in which the blades are fastened with respect to an inner shell by means of lugs which are extended through corresponding slots in the inner shell and are thereafter bent over; in the assembly, the blades are fixed in the given position in an outer shell by one circumferential clamping band each whereafter the inner shell is assembled by extending the lugs through the slots thereof and the lugs are thereafter bent over; a wire ring of soldering or brazing material is then applied at least within the joint area of the outer clamping band with the outer shell and the assembly is then heated, preferably in a protective gas atmosphere to a temperature above the melting temperature of the soldering or brazing material; after the soldering or brazing material has run into the gaps and cracks the assembly is then cooled.

Abstract: Apparatus for progressively removing an inflexible undercut male mandrel pivotally attached to a platen from an undercut article formed about the mandrel by, for example, vacuum forming, wherein angular rotation of the mandrel in relation to the article permits progressive removal with regard to the undercut portion of the article.

Abstract: A method of molding a synthetic resin which comprises: kneading a mixture obtained by dispersing a cross-linking agent in said synthetic resin, while melting said resin by applying such temperature and pressure as will not give rise to cross-linking reaction, introducing the thus kneaded mixture into plural reaction chambers to effect cross-linking therein by applying an appropriate temperature and high pressure, and extruding the thus cross-linked material continuously from said reaction chambers through a head die for molding purpose; and a molding apparatus relevant to said method.