Abstract: Pinhole-free, radiation absorbing, surgical quality latex gloves are formed from homogeneous suspension of natural rubber and high specific gravity metal or metal compound. The suspension is formed under conditions which prevent entrapment of gas in the suspension.

Abstract: Single and double injection molding using a single molding machine is made possible by providing two injection units, each having an injection nozzle, and a stationary platen three insertion holes into which the nozzles can fit. For double injection, the injection units are moved transversely of the stationary platen so as to orient both injection nozzles with a respective one of the insertion holes. For single injection, the injection units again are moved transversely of the stationary platen so as to orient one of the injection nozzles with one of the insertion holes, with the other nozzle not being so oriented.

Abstract: A method for forming structural injection molded parts includes the steps of positioning a closed-loop cutting blade in surrounding relation to one of a male and female mold which together define a mold cavity corresponding to the shape of a part to be molded, positioning reinforcing material over the female mold, moving the male mold into the female mold to position the reinforcing material in the mold cavity, thereafter moving the cutting blade independently of the mold which it surrounds to trim the reinforcing material, and injecting resin into the mold cavity to produce a structural injection molded part. The cutting blade and the mold which it surrounds are part of and movable with a common die set assembly having a lost motion drive connection between the mold and the cutting blade, such that the trimming step is accomplished by lost motion movement between the mold and the cutting blade after the male and female molds have been mated.

Abstract: A method of injection molding a styrene resin or a composition thereof, which includes injection molding a molten molding resin material of a styrene-conjugated diene block copolymer containing 50 to 90% by weight of a styrene polymer or a molten molding resin material of a resin composition comprising 50% by weight or more of the styrene-conjugated diene block copolymer and 50% by weight or less of a styrene resin other than the styrene-conjugated diene block copolymer, wherein the molten resin is injected and filled into a mold with a wall surface temperature at core and cavity portions within the mold being made 110.degree. to 180.degree. C., and the molded product is demolded when the wall surface temperature of the core and cavity portions is lowered to the glass transition temperature or lower of the styrene polymer moiety in the block copolymer. The obtained molded product has a high impact resistance.

Abstract: A method of manufacturing composite moldings by executing the following steps (a) to (f) by using an injection molding machine provided with a fixed die having a gate which is opened to a cavity forming surface and a movable die which can come into contact with and out of contact with the fixed die:(a) step of setting a desired skin material to a predetermined position of the movable die in a state in which the movable die is sufficiently removed from the fixed die;(b) a first die clamping step in which the movable die is moved toward the fixed die and is stopped at a position where an interval between the movable and fixed dies is equal to a predetermined value of 5 mm or more;(c) step of injecting a fused resin into a cavity;(d) a second die clamping step in which the movable die is stopped at a desired last position;(e) step of cooling for a predetermined time after the second die clamping step;(f) step of removing the movable die from the fixed die and opening the dies and taking out a product.

Abstract: A method of manufacturing a resin-sealed type semiconductor device including heating sealing resin at a state of contacting the resin to a cull portion by means of a plunger during a predetermined period at the time the plunger stops its movement. The sealing resin is sufficiently heated to become low viscosity melting state. Thereafter, the melting state resin is injected into a cavity where resin sealing is performed.

Abstract: Packaging means such as a bottle, jar or other receptacle, having a sealing ring, as well as a process for manufacturing such a seal. These packaging means include containers especially of the type to be kept in stock and/or stored. The packaging means include at least a container and a lid, between which is arranged a sealing ring defining an internal space in relation to the outside of the packaging means, with the packaging means being capable of containing a product or any other substance whatsoever under conditions of vacuum or partial vacuum. The sealing ring includes means for bringing about communication between the internal space and the outside of packaging means, being blocked while the vacuum is being brought about and/or maintained and capable of being unblocked in order to facilitate opening the packaging means.

Abstract: A solderless twist on wire connector and a method of making a solderless twist on wire junction encapsulating twist on wire connector by securing a prior art twist on wire connector in a shell to produce a wire junction encapsulating twist on wire connector that can in one operation permit the user to twist the connector to simultaneously compress the junction ends of electrical wires into low resistance electrical contact while encapsulating the junction ends of the electrical wires in a solderless substance. The process includes the method making a twist on wire connector by encapsulating a prior art twist on wire connector in a shell to produce a wire junction encapsulating twist on wire connector having a chamber for an encapsulating material. In one embodiment the twist on wire junction encapsulating twist on wire connector includes a puncturable seal and in another embodiment a second compartment for holding a mixable encapsulating materials.

Abstract: A resin material is fed into a cavity of a mold provided with a movable member adapted to form a tear-line on the resin material and capable of moving toward, and away from, the mold cavity such that when the mold cavity is filled with the resin material and the mold is closed, the movable member is advanced toward the mold cavity thereby obtaining a modular cover provided with a tear-line having a small thickness and a high degree of strength.

Abstract: Injected fluid plastic material directed to a predetermined side of a film section that is inserted into a mold cavity by utilizing a mold that includes a first mold part with a first mold-cavity section and a second mold part with a second mold-cavity section, a gate with a gate region, and a multitude of specific flow channels in the first mold-cavity section for directing injected plastic material away from the gate region; placing the film section in the second mold-cavity section so that the film section covers an extensive region of both the specific flow channels and the thin mold-cavity region and so that the film section does not cover a first segment of each of the specific flow channels which are closest to the gate region, but does cover a second segment of each of the specific flow channels which is a continuation the first segment of each of the specific flow channels; and injecting the fluid plastic material into the mold-cavity, so that the fluid plastic material flows away form the gate regio

Abstract: A method of making a reaction injection moulded elastomer which includes injecting into a mould cavity a reaction mixture including:(A) an organic polyisocyanate, and(B) an isocyanate-reactive composition comprising the reaction product of:(a) the reaction product of a polyol or polythiol having an average hydroxyl or thiol functionality of from about 1.5 to about 6 and an average molecular weight of from about 100 to about 12,000 and an acylating agent, and(b) a polyfunctional compound which is capable of reacting with reactant (a) to provide a product containing a plurality of isocyanate-reactive groups.

Abstract: A process for preparing an injection-molded article having a three-dimensional pattern on a surface thereof includes placing a master film of a thermoplastic resin having a three-dimensional master pattern formed on a region thereof into a mold such that the master pattern is exposed to the mold cavity. An injection-moldable resin is then injected into the mold cavity so as to cause a surface region of the resin to conform to the three-dimensional master pattern on the master film, and to thereby transfer the master pattern onto said surface region of the resin. The master film is then removed from the surface region of the injection molded resin to thereby expose said three-dimensional pattern formed thereupon. Preferably the master film is formed of a thermoplastic resin having a melting point greater than the injection molding temperature. Other lower melting point thermoplastic films can be used by metallizing the film's surface so that it withstands the injection molding temperature.

Abstract: A method is provided for fabricating resin-filled components, which comprise a multi-element arrangement of a thermoformed plastic sheet with a "second-surface" screen-printed graphic, which formed sheet can receive a light-directing apparatus, and the molded-resin is applied so as to secure the apparatus and provide stability to the overall structure or component. The method is particularly adapted with respect to the fabrication of graphic-display illuminated buttons for use within automotive vehicles.

Abstract: A method for image-transfer molding half portions of a casing body of a magnetic tape cassette in which no portions of an image transfer film are left in the cassette holes. The image transfer film includes a base layer, a peeling layer, a protective layer, an ink layer, and an adhesive layer. A band of the image transfer film is pinched between dies for molding said half portion, with the adhesive layer positioned so as to abut an outer surface of the molded half portion. A pair of pins is placed in the dies in a position where a hole is to be formed in the half portion, with an end of one of the pins having a peripheral edge portion projecting in a direction parallel to the longitudinal axis of the pin and forming a recess receiving the end of the other of said pins with a portion of the image transfer film sandwiched therebetween.

Abstract: An improved decorative automotive vehicle trim strip and method and apparatus for forming by reshaping an end of a previously extruded length of thermoplastic material. The surface of the length of thermoplastic material intended for viewing is maintained at a cold temperature, well below the softening point of the thermoplastic material, during the reshaping operation. The length of thermoplastic material is heated during reshaping by a mold section heated 400.degree. to 410.degree. F. pressed against the surface intended to be affixed to the vehicle.