Abstract: Nail files are made in a manner which permits ease of dispensing. A tube is continuously fed into a milling machine where grooves are formed in predetermined segments of the tube. These grooves are roughened by adhesively applying abrasive particles or by milling the groove surfaces. The tubes are stamped so as to form alternating long grooved areas and short smooth areas. The thus-prepared tubes are divided into sections of desired lengths containing a plurality of nail files which may be easily detached from the remainder of the files in the section. Another method comprises providing a solid or hollow rod which has any of a variety of geometric cross-sections, providing the rod with grooves having varying sizes, roughening the surfaces of the grooves as above, and weakening the rods at predetermined lengths to produce sections containing a series of easily detached segments. The hollow files may be fitted with closures at each end. At least one of these closures is removable and replaceable.

Abstract: In the end portion of a weather strip, the projecting base end portion of a hollow seal portion is left as a first uncut-off portion, whereas the main portion of the hollow seal portion is cut off. The thus treated end portion is set in a split mold. In this setting, a cooling mold is brought into contact with a decorative high molecular layer. Also, the first uncut-off portion is pushed down in a direction away from the decorative high molecular layer is thereby pressed against the outer surface of the side wall of a trim portion. Also, a first middle mold is disposed opposed to the outer surface of the side wall to thereby form a cavity, while the cavity and decorative high molecular layer are separated from each other through the first uncut-off portion. Molding material is injected into the cavity to thereby form a mold forming portion.

Abstract: A method of releasing thin discs during molding forms discs with a central aperture with a thin gate connecting the molded disc to a sprue. A male cutter advances under pressure control of an actuator operating the male cutter and implements releasing of the molded discs from the surfaces of a stamper and a mirror plate during mold closing. The molded disc and the sprue are ejected by a center pin in the mold opening operation.

Abstract: A composition containing thermoplastic elastomer and elastic fine particles is extruded into a sheet-like shape from an extruder. Then, by expanding this sheet-like shape member, a covering sheet having minute unevenness attributable to the elastic fine particles formed on the surface is produced. The covering sheet may have an adhesive layer, a substrate layer, a foamed resin layer, etc., on the opposite side to the surface having a matt feeling. Such covering sheet can be produced with good productivity without creating environmental problems such as a problem related to solvent, etc. By molding using the covering sheet, a molding having matt feeling can be obtained.

Abstract: A first mold is provided having a first molding surface including a flat primary surface area, a plurality of spaced leg areas within the primary surface area, and a plurality of pin holes in the primary surface area positioned between the leg areas; and a second mold is provided having a second molding surface including a flat primary surface area, a plurality of leg areas in the primary surface area corresponding to the leg areas in the primary surface area of the first molding surface, and a plurality of spaced knitting surfaces relieved from the general plain of the primary surface area, positioned between the leg areas, and corresponding to respective pin holes in the primary surface area of the first molding surface. A first plastic sheet is thermoformed to the first molding surface to conform the first plastic sheet to the primary surface area and the leg areas of the first molding surface and position the sheet in overlying relation to the pin holes.

Abstract: A process and an apparatus for molding, in which a molten thermoplastic resin is firmly fitted onto a molding surface of a mold under a pressure lower than or equal to 100 kg/cm.sup.2 and is cured to obtain a molded product. The molding apparatus has a mold main body, and a mold body on which the molding surface is defined. The mold body is supported relative to the mold main body with maintaining a space on the back side of the molding surface in a heat insulative manner by a supporting member which includes at least a heat insulative supporting member having a thermal conductivity of 0.001 to 1 Kcal/mh.degree. C. and a longitudinal elastic modulus of 0.01 to 10 kg/cm.sup.2. In the space, a heating fluid for heating the molding surface from the back side to a temperature higher than or equal to Vicat softening temperature (T).degree. C.

Abstract: A method and an apparatus for manufacturing a multi-layer bottle by discharging an inner layer parison from a multi-layer die head and pinching a lower portion of the inner layer parison by a pinch apparatus; discharging an outer layer parison which is longer than the inner layer parison; pinching the lower portion of the outer layer parison by a molding mold; and blow molding the inner layer parison. In such a manner, the multi-layer bottle is manufactured. When the multi-layer bottle having an inner layer separating function is manufactured, the inner layer parison and the outer layer parison comprise different resins having no adhesivity to each other.

Abstract: A thermoforming machine utilizes two clamping frames to advance cut sheets through heating and forming stations, with the clamping frames returned via an overhead path above the oven in the heating station. Pneumatic cylinders arranged about the inner perimeter of the frames are operated to grip the sheet and release the sheets, which are pressurized and released via fluid connections established when the frames are lifted from a transfer bar structure at the loading and forming stations. The clamping frames have pivoted end sections which are engaged by extendible gear posts at the forming station to bend the clamped sheet into greater conformity with the tooling shape prior to forming.

Abstract: A method of manufacturing a door glass run to be attached along an inner periphery of a door frame of a vehicle door.

Abstract: A method and apparatus wherein an extruder provides extruded plastic parisons to a first and second horizontally movable blow mold assemblies, and each blow mold assembly includes two sets of blow molds, and each set includes a pair of blow mold halves. The blow mold halves are closed about the tubular parisons and moved to one of two blow molding stations where a blow pin at the blow molding station blows the parison to form a hollow blow molded article. More specifically, four platens are provided in each blow mold assembly. A first pair of outer and inner platens supports the first pair of blow mold halves and a second pair of outer and inner platens supports the second pair of blow mold halves. A pair of tie rods passes through all four platens. The first outer platen is attached to the ends of the tie rods. The second outer platen is moved by a mechanism such as a cylinder or toggle mechanism for movement on the tie rods.

Abstract: Multiple legs elevate a central ring bearing, to which a ring-shaped rotatable plastic sheet support carousel is mounted. The carousel is fitted with a ring gear which engages with a drive system to position the carousel and the thermoplastic sheets supported from it. A multi-post vertical press is positioned with two posts extending upwardly interior to the ring bearing, and two posts extending upwardly exterior to the ring bearing. The ring bearing thus extends through the press, allowing the carousel to supply and remove plastic sheets to and from the press. An upper platen and a lower platen are mounted for vertical displacement to the posts, thereby ensuring a high degree of parallelism between the molds mounted to the platens, and accurate twin-sheet thermoforming.

Abstract: A method of forming a molded seal portion onto a corner part of a weather strip without generating any molding defect due to variations in the injection amount, injection pressure or the like of the molding material. A seal portion projecting from one side wall of a trim portion is partly cut off, the remaining trim portion is bent to a corner configuration and placed in a mold, and a molding material for the seal portion is injected into a cavity of the mold from the position corresponding to a longitudinally extending base end edge of the molded seal portion such that the molding material flows from the side of the longitudinally extending base end edge of the molded seal portion towards a distal end edge thereof to fill the cavity.

Abstract: A frame is provided for firmly securing a dental press holding one or more flasks during preparation of dental prostheses. The frame securely locks the press in position and facilitates tightening of the press to exert pressure on the dental flasks as well as release of the pressure once the procedure is completed. Use of the frame permits a single technician to tighten and loosen the press with a single hand and allows greater tightening of the press to exclude voids and pockets in the finished prosthesis.

Abstract: Automobile body parts having contoured, decorative outer surfaces are molded. The automobile body parts include a molded polymer substrate and a decorative surfacing film adhered to one side of the substrate. The decorative surfacing film includes a substantially molecularly unoriented cast polymer film formed from a weatherable polymer. Also a method for making sets of such automobile body parts for assembly into automobile bodies is taught.

Abstract: An extruded "Y" or bifurcated tube having unitary construction and an extrusion apparatus therefor. The "Y" tube includes three separate tubes, each tube having a central lumen, and a transition portion integral with the tubes and providing physical connection and fluid communication between the individual lumens of the three separate tubes. The first of the three tubes has a first lumen and is first formed by extrusion through a convention extruding die. The extruder die then gradually bifurcates the first tube, providing a gradual transition between the first tube and the second and third tubes. The lumens in the second and third tubes thus formed remain in uninterrupted fluid communication with the lumen of the first tube. The bifurcation takes place with the first tube to form second and third tubes smoothly and over a transition distance which is easily controlled by the extruder die. The bifurcated second and third tubes are continuous with the first tube making the "Y" tube unitary.

Abstract: A method for fabricating a sintered oilless bearing using a correcting rod having a projection correcting portion and a groove forming portion having outer diameters respectively identical to inner diameters of projections and grooves to be formed into the oilless bearing. An upper punch is inserted into the upper portion of the correcting rod for pressing the sintered oilless bearing to allow the inner periphery of the sintered oilless bearing to closely contact the groove forming portion and, simultaneously, fit into the projection forming portion.

Abstract: A preheater and method of preheating a thermoplastic sheet prior to entry of the sheet into a differential pressure forming machine which forms an article in the sheet. The preheater includes mechanism for initially threading a sheet in a generally horizontal plane, mechanism for concurrently displacing upstream and downstream portions of the sheet in vertically opposite directions relative to the horizontal plane to dispose a portion of the sheet in an upstanding plane. A heater is provided for heating the upstanding portion of the sheet in the upstanding plane. After the sheet has been repositioned with a portion in the upstanding plane, the heater is laterally moved from an inoperative position to a sheet heating position receiving the portion of the sheet at the sheet heating station. Mechanism is provided for selectively moving the sheet downstream after the sheet has been vertically displaced.

Abstract: A PVC film cover including a down and interned marginal portion terminating in a thickened bead, the marginal portion tapering in thickness from the bead toward the central body portion of the cover. The cover is produced through the use of a shape-conforming mold into whose central portion liquid PVC is dispensed while the mold is rotating. The liquid PVC moves over the mold surfaces outward toward the outer marginal portion thereof by centrifugal force and rotation of the mold is terminated and the mold is quickly inverted into a downwardly opening position whereupon the excess liquid PVC at the outer periphery of the mold flows slowly down to a reversely turned edge for forming the bead of the cover. In quick succession, the mold is heated in order to gel and then harden the liquid PVC, mold is cooled and the cover is thereafter removed from the mold.

Abstract: The method and apparatus for forming a structural member from solid waste which consists of comminuting or shredding solid waste into particles one inch or smaller, adding a small amount of a thermoplastic material such as polyurethane or polyethylene to produce bonding, then heating the mixture and forcing the heated mixture through a restrictive extrusion die under high compression which forms the same in a predetermined transverse cross sectional configuration. Thereupon, the shaped compressed mixture is allowed to cool while maintaining the predetermined shape, and upon cooling, a thermoplastic cover encapsulates the compressed shaped product. The structural member is then cut into the desired lengths.

Abstract: A sponge cloth of decrystallized cellulose modified by the acetyl group content, where the average degree of substitution is 0.2 to 1.5. The cloth does not contain any organic or inorganic sulfur compounds. The sponge cloth is produced by treating wood pulp with sodium hydroxide solution, then treating it with acetylating substances, drying and dissolving in an organic solvent with the addition of a pore-forming salt, fibers and optionally pigment dyes and foaming agents, spreading the mixture on a web and boiling in water with subsequent drying to form a finished cloth.