Abstract: A plastic bottle made of biaxially oriented polyethylene terephthalate comprises a narrow neck portion, a downwardly and outwardly flared shoulder portion continuous from the neck portion, a generally cylindrical body portion and a bottom portion, wherein said portions except for the neck portion have a density of at least 1.375, and the internal volume increase rate is less than 5% when the bottle filled with a liquid at 20.degree. C. containing a 2 gas volume of carbon dioxide gas is immersed in warm water at 75.degree. C. for 30 minutes.

Abstract: An apparatus for biaxial-blow-molding a hollow bottle-shaped container of a synthetic resin which has a bottom mold having an upper surface becoming the bottom mold surface of the bottle-shaped container and a cylinder chamber formed therein, a bottom protruding pin having an upper end face forming part of the bottom mold surface of the bottom mold and a piston portion formed at the bottom end thereof and telescopically moved back and forth in the cylinder chamber of the bottom mold, and an elastic member disposed in the cylinder chamber of the bottom mold for urging the bottom protruding pin forwardly when the member is contacted with the piston portion of the bottom protruding pin in such a manner that the tension of the member is weaker than the pressure of compressed air to be blown into the molds. This apparatus is operated by a method of biaxial-blow-molding the hollow bottle-shaped container of a synthetic resin of the invention.

Abstract: A method for adjusting blocks in the height which comprises laying over the top sides of the blocks an amount of a material which is hardenable and bindable thereon, with a height which is higher than the difference between said predetermined height and the actual height of the block under consideration, and levelling thereafter said material over said block sides before hardening thereof until the total block height formed by the sum of said block height and said material height, substantially corresponds to said predetermined height.

Abstract: A portable roof edge seaming apparatus for aiding in the chemical welding of the edge of a sheet of vinyl roofing membrane to either an overlapped sheet thereof or to a vinyl clad metal edge member includes a fleece or cloth lined skid plate, a solvent reservoir, a brush member mounted forward of the skid plate for applying solvent from the reservoir to an area between the members to be welded, and a weighted roller mounted rearward of the skid plate for applying uniform pressure over the members to which solvent has been applied.

Abstract: Method and apparatus for molding of plastic tubing, including an elongate nozzle receiving an extrudate of an expandible plastic material under pressure from an extrusion head and a coaxial mandrel with air supply and evacuating passages communicating with a vortex generation tube for cooling air before its introduction to the interior of the formed tubing for its blowing and conforming to the walls of a tubular mold cavity formed by a series of forwardly moving molds.

Abstract: An extrusion blow molded container is provided having an integrally formed generally annular pouring lip including an upwardly facing convex surface beginning at a generally vertical inner wall of the container and curving through an arc of less than 180 degrees. The lip is undercut forming a sharp downwardly directed annular edge on the lip. The lip can be formed by cutting the lip with a downwardly curved cutting tool bearing against an upwardly curved anvil, the cutting tool forming the upwardly facing convex surface of the lip and the anvil forming the undercut lower surface of the lip.

Abstract: In the production of molded articles from a pourable substance, such as a porcelain substance, a hollow mold space is formed between a pair of horizontally displaceable compression mold parts. In the closed molding position, the mold parts are is spaced relation and form an annular gap laterally enclosing the mold space. An annular member forms a closure for the gap. The pourable substance is introduced into a passage through the closure member and through the gap into the mold space. A vacuum system is provided in the closure member in communication with the mold space during the step of filling the pourable substance into the mold space.

Abstract: A heatable winding drum construction for use in the manufacture of thermoplastic tubes and receptacles comprises an internal supporting structure for an elongated cylindrical wall with an insulating layer between the supporting structure and the wall.

Abstract: A tire manufacturing mold having a contour surface consisting of a predetermined curved surface corresponding to the outer circumferential surface of a tire being molded, a plurality of bone portions and blade portions, both protruding on the contour surface, and a manufacturing method of the same are disclosed. The tire manufacturing mold is manufactured by discharge machining in such a manner that the blade portions are caused to protrude essentially vertically to the contour surface, and that the contour surface, the bone portions and the blade portions are integrally formed.

Abstract: An apparatus for the manufacture of selectively apertured thermoplastic sheet or film, comprising a rotatable molding element means for receiving the film and which means has a predetermined pattern therein wherein as the film is contacted with the rotatable molding element means and a fluid pressure differential is applied to the surface of the film, a desired pattern of perforated areas and non-perforated areas are imparted to the film with each of said areas being continuous across the web of the film and alternating in the machine direction.

Abstract: A method for producing a container from a tubular blank of polyethylene terephthalate or similar material, according to which a polyethylene terephthalate blank is stretched at least approximately 3-fold to produce a preform (20). In an axial section through the preform, the contour length substantially corresponds to the contour length in an axial section through the final container. The preform (20) is heated to a temperature above the glass transition temperature (TG) and is converted to the container (21) in a blow mold (12). In doing so, the contour length of the material is maintained through successive reduction of the axial length of the body (23) which the preform constitutes during the conversion to the container. In order to achieve this, the base portion of the blow mold (11) is moved towards the orifice (22) of the final container.

Abstract: A method and apparatus are provided for molding a container such as an ampoule with a hermetically sealed top or closure joined to the upper portion of the container with a peripheral frangible web. Main mold halves defining a cavity are provided with an inwardly projecting portion that defines an upwardly facing bearing surface and a forming edge. A mandrel is provided with at least a downwardly facing first frustoconical sealing surface and with a frustoconical engaging surface extending downwardly and inwardly from the downwardly facing first frustoconical sealing surface. The mandrel is adapted to be positioned in a length of parison extending from the main mold means to temporarily seal the parison opening during vacuum or blow forming of the container.

Abstract: A method and apparatus for injection blow molding hollow plastic articles characterized by a rapid and efficient operating cycle. The injection mold includes a mold cavity and the blow mold is located adjacent the mold cavity in side-by-side relationship. The parison is injection molded into the mold cavity onto a core. The parison on the core is separated from the mold cavity by moving the parison on the core axially in a straight path away from the mold cavity, followed by movement in a substantially arcuate path into axial alignment with the blow mold, followed by axial movement in a straight path into said blow mold.

Abstract: The invention relates to a process for producing plates of a metallic or semimetallic material.The latter is in the form of a liquid mass entirely separated from the walls of a crucible by a liquid film of a second material. A group of plates is lowered into the crucible, in order that the liquid mass can solidify, while being separated from the plates by the protective liquid film.Application is to the production of photovoltaic silicon plates.

Abstract: A method is disclosed for forming, filling and hermetically sealing a blowmolded container having a sterile integral inner dispensing outlet, all in a single sterile operation. The method is directed toward establishing a preferably hermetic seal between the inner dispensing outlet and the container neck, by establishing the seal early in the blowmolding cycle. This is accomplished by mounting the dispensing outlet-defining tubular member about a unique fluid supply mandrel. The supply mandrel thereby also serves as a check and the tubular member of the to-be-formed container serves as a tool in blowmolding. The dispensing outlet/container neck seal is thus formed before the blowmolding step.

Abstract: A process for producing a stretched multilayer polyester bottle which comprises axially stretching a bottomed multilayer preform comprised of an inside and an outside polyester surface layer and an interlayer of a gas-barrier resin provided therebetween optionally through an adhesive under conditions which induce molecular orientation of the polyester and simultaneously stretching it circumferentially by blowing. The multilayer preform is produced by coating a solution or emulsion of an ethylene-vinyl alcohol copolymer on one surface of a primary preform of the polyester molded in advance, drying the coated preform at a temperature at which no whitening owing to the crystallization of the polyester occurs to thereby form a thin but continuous film of the ethylene-vinyl alcohol polymer on the primary preform, mounting the coated pre-form on an injection mold, and injection the polyester onto the coated layer to form the inside or outside surface layer of the polyester.

Abstract: Double walled thermoplastic tubes, with corrugated outer walls and smooth inner wall are formed with integral bell sections spaced along the tube. The outer, corrugated wall is formed with a bell section. One of the walls is pierced between the ends of the bell section to allow the escape of air, and the inner wall is pressed outwards into engagement with the bell section of the outer wall.

Abstract: A holding furnace for molten metal comprises an inner vessel formed of flat, rigid, heat-resistant panels. The panels are held in sealing engagement with one another at abutting edge surfaces by the action of inwardly directed pressure applied to the panels by an integrally cast refractory outer vessel through the intermediary of a resilient layer of heat-resistant fibrous material. The pressure is applied as a result of the shrinking that the casting compound undergoes during the setting. When the inner vessel is being made, the panels, to which the resilient layer has initially been applied, are held together by the action of a reduced pressure in the inner vessel as the latter is positioned in a furnace casing interiorly lined with a mineral wool insulation. The inner vessel then is cast around with a refractory casting compound for forming the outer vessel.

Abstract: A process of producing a tubular pre-moulding of a thermoplastic material, suitable for subsequent shaping to form containers by a rolling process. The material in a part of a tube is axially oriented as a result of reducing the wall thickness by applying an external pressure which causes the material to flow. The oriented material is moulded by a blow-moulding process into future mouth parts and parts of adjacent neck sections, preferably from two blank parts, joined to one another, of pre-mouldings, the blank parts in the transition between the two mouth parts being severed in order to form two separate blank parts, so that, after closing one end and, if necessary, reworking in order to obtain the requisite closing faces at the other end, the two blank parts each form a tubular pre-moulding.

Abstract: The method of producing a hollow body from plastic material with an annular protrusion disposed circumferentially around the wall of the body, the method comprising the formation of the protrusion by extruding the protrusion from the wall of the preform after the preform has been made.