Abstract: With an auxiliary electrode having a shape corresponding to the end of a workpiece attached to an upper electrode of a high frequency heater for high-frequency heating the end of the workpiece extruded, the workpiece is high-frequency heated intensively and uniformly between the auxiliary electrode and the lower electrode. After heating, the end of the workpiece is molded into a predetermined shape by a couple of stamping molds.

Abstract: A method of preparing a window panel with a resinous frame, comprises relatively moving a window panel and a die for extruding a resinous material so that the die is moved along a peripheral portion of the window panel, and extruding the resinous material from the die in a predetermined shape to form a shaped product for a resinous frame on the peripheral portion of the window panel; wherein the relative movement of the die and the window panel is carried out by using an operating robot which has been taught a track to follow; and wherein the operating robot has been taught another track so as to separate the die and the panel when the die has moved around the peripheral portion of the window panel and has returned at a position just before a beginning of the shaped product, thereby to form the frame on the window panel in a one-piece construction.

Abstract: In a for the production of biaxially stretched films, a take-off roll 4 is arranged downstream of a draw-off roll 3 . A plastic melt is formed into an initial film by means of a slot die 1, cooled on the draw-off roll 3 and passed over the take-off roll 4 which has a predetermined surface roughness. The film is then biaxially stretched and heat-set.

Abstract: A method of making an intravascular balloon catheter that has an elongated shaft defining an inflation lumen and a guidewire lumen, as well as a balloon disposed near the distal end of the shaft. The method may include forming an inner shaft by coextruding a flexible plastic tube by bringing a molten outer plastic layer into contact with a molten inner plastic layer, thereby bonding the plastic layers together during the coextrusion process. The inner plastic layer may be more lubricious than the outer plastic layer.

Abstract: A method for making multilayer polyester films is provided wherein a slippery surface is imparted to the film, without the use of slip agents, through appropriate crystallization and orientation of the film.

Abstract: An automobile windshield molding for a motor vehicle seals the space between a windshield and a periphery of a window opening of a vehicle body panel. A molding machine produces such an automobile windshield molding using a special molding method. The machine has a first plate and a second plate structured and arranged to allow some of the resin flow to be diverted from the extrusion opening when the cross section of the molding is changed. The machine includes a cutter for forming a water drain channel. The cutter has an opening for removing the cut away resin.

Abstract: A method and apparatus for producing continuous lengths of compression-molded material containing thermoplastic resin. Discrete lengths of extruded material are indexed through a compression mold. The mold forms, hardens, and integrally joins two successive extruded segments of material. A first molded segment is indexed forward leaving a trailing portion in the mold. A subsequent segment is extruded into the mold, and is integrally joined to the trailing portion by compressing the mold. Subsequent segments can be joined to produce a continuous profiled length formed from recycled thermoplastic material, while avoiding damage and downtime caused by contaminants in recycled material.

Abstract: Long fiber-reinforced thermoplastic resin compositions are made by passing a loosened continuous fiber bundle web through a coating die having a resin discharge outlet and coating at least one side of upper and lower sides of the web with a thermoplastic resin melt discharged from the resin discharge outlet. The web is pulled from the coating die in a generally horizontal downstream running direction. While the resin-coated continues fiber bundle web is being pulled generally horizontally the resin-coated continuous fiber bundle web is brought into contact with a plurality of upper and lower bars located downstream and outside of the coating die and arranged such that respective contact positions between web and the bars are generally in a horizontal plane, and such that the longitudinal axis of each of the bars is oriented transversely relative to the downstream running direction of the web. In such a manner, the web is impregnated with the resin melt to thereby form a fiber-reinforced composition.

Abstract: Apparatus and methods are provided for producing a long fiber-reinforced thermoplastic resin compositions by initially loosening a continuous fiber bundle by a fiber loosening device so as to form a moving web-like continuous fiber bundle. At least one side of the moving web-like continuous fiber bundle which passes through the die is coated with a thermoplastic resin melt extruded through a slit disposed in the die by an extruder. The slit has substantially the same width as that of the web-like continuous fiber bundle to provide an even supply of the resin melt in the width direction of the web-like continuous fiber bundle. A thermoplastic resin melt is supplied to the slit via a plurality of resin supply paths which are branched successively on the same plane. The resin supply paths are positioned so as to be symmetrically planar with respect to the central axis of the root paths thereof.

Abstract: The present invention is a method of producing an extruded composite comprising the general steps of: (a) extruding a longitudinally oriented composite precursor coextrusion comprising: (1) at least one thermoplastic polymeric material and (2) a core mixture of at least one thermosetting resin and at least one filler material; whereby the thermoplastic polymeric material(s) is extruded so as to substantially enclose a space, and whereby the core mixture is pumped into the space; and (b) maintaining the composite precursor under conditions whereby the at least one thermoplastic polymeric material becomes cooled and the at least one thermosetting resin becomes cured so as to form the extruded composite of the present invention.

Abstract: In the assembly of a windshield glass and a weather strip having a partly modified cross section the weather strip is extruded along the peripheral edge of the windshield glass and fixedly adhered thereto, a movable die 132 of a die assembly is properly moved so as to change the shape of an orifice of the die assembly.

Abstract: Porous pipe formed by extruding a mixture of particles of vulcanized rubber dispersed in a binder resin such as linear low density polyethylene preferably having a Melt Index below 1.0 and a broad distribution of molecular weights, through a pipe die to form porous pipe and then cooling the pipe in a cooling trough. The pipe is stabilized to reduce degradation by ultraviolet light by dispersing in the binder resin an effective amount of an ultraviolet stabilizer such as 0.1 to 10% by weight of carbon black.

Abstract: An apparatus for mounting a tissue specimen on a chuck for sectioning in a cryostat including a base, a clamp for receiving a tissue preparation slide, a chuck holder secured to the base for holding the chuck in a predetermined orientation relative to the clamp, a support secured to the base and extending therefrom and terminating in a distal end, and, means for slideably securing said clamp to said support. The clamp is positionable between a first location in which the clamp is at a minimum distance from the chuck holder and a second location in which the clamp is at a maximum distance from the chuck holder. A method for using the apparatus is likewise disclosed.

Abstract: In a method of manufacturing moldings and an apparatus therefore, a ridge piece 20 protrudes from a molding main body 10 of a molding 1 in a lip manner is removed gradually from a leading end side to a root side by a lip removing piece 33 moving together with a second die 32 which changes the extrusion contour of the molding main body 10, then the ridge piece 20 is removed by the movement of the second die 32 without decreasing the thickness of the ridge piece 20 thinning. Accordingly, the ridge piece 20 can be removed effectively by the simple operation and apparatus without requiring the operation such as the after-treatment, which can result in the improvements of the productivity of the molding 1, the appearance of the molding 1, and the reliability.

Abstract: A process for the production of a biaxially oriented propylene polymer film contains, in its single ply (or, if it is a multi-ply film, in its base ply) a low molecular weight resin, and the film has improved stretchability and other desirable physical properties, even though the propylene polymer of the sole or base ply is preferably a homopolymer. The n-heptane-insoluble fraction of the film has a chain isotacticity index, measured by means of .sup.13 C-NMR spectroscopy, of at least 85 to 94%. The sole or base ply contains less than 10% by weight of resin. The film is stretched in such a way that the product of tensile strength in the longitudinal and transverse direction is greater than 50,000 (N/mm.sup.2).sup.2. The film is made by, among other steps, carrying out the orientation in the longitudinal and transverse directions such that the product of the longitudinal stretching ratio and the transverse stretching ratio is.gtoreq.60.

Abstract: A method of forming a two-layer plastic pipe (4;8) to be laid in the ground for conducting material therethrough forms a core pipe (2) consisting essentially of a first plastic material and forms a detachable outer hose (3;7) of a second plastic material around said core pipe (2) by a suitable coating method, including in said second plastic material an amount of additives effective to protect said core pipe with said outer hose from stresses and loads of laying said core pipe and outer hose and usage thereof in ground.

Abstract: A method and apparatus for recycling waste resin products are disclosed in which a shearing force is produced from pulverized small pieces due to the rotation speed difference of rollers by making the small pieces pass between the rollers rotated at different speeds. The shearing force is applied to both sides of the small pieces at different magnitudes. Foreign material films are separated from the small pieces due to the shearing stress difference between the small pieces and the films coated thereon. Additionally, the small pieces are passed through a secondary pulverizer rotated at a high speed to be thereby pulverized secondarily into a predetermined size, whereby the foreign material films are completely separated from the small pieces.

Abstract: Electrically conductive tape yarns of two or more layers comprising thermoplastic polymer resin and electrically conductive particles are prepared by a process comprising extruding a multilayer film containing at least one electrically conductive layer and at least one layer substantially free of electrically conductive particles, quenching the film, slitting the film into tapes and orienting the film before or after slitting.

Abstract: A multilayer polyester film, and a method for making the same, is provided. The film consists of alternating layers of polyethylene terephthalate and polyethylene naphthalate. Biaxial orientation and subsequent restrained heat setting of these materials results in thin films with tensile moduli in both stretch directions well in excess of the values obtained with monolithic films of either material. In some embodiments, a slippery surface is imparted to the film without the use of conventional slip agents.

Abstract: A method of extruding a homogeneous plastic rod substantially free of shrink voids, the method having the steps of: extruding a rod central portion of plastic material having a glass transition point and a Vicat softening point below the glass transition point, the rod central portion having a center core and an outer skin; cooling the rod central portion while maintaining the outer skin above the Vicat softening point until the center core is cooled to approximately the Vicat softening point; using an extruder to extrude around the rod central portion a sheath of the same plastic material, the sheath having an outer skin and inner and outer portions, such that the rod central portion acts as a heat sink for the inner portion of the sheath, and such that, at the extruder, the plastic material forming the outer skin of the rod central portion is melted upon contact with the plastic material forming the sheath and the plastic material of the rod central portion and the plastic material of the sheath form the ho