Abstract: According to the method of the invention an article of thermoplastic material is partially expanded and preformed in a heated mold. The preformed article is withdrawn from the heated mold to further expand at atmospheric pressure and is transferred still malleable into a cooled mold having the final size and configuration of the article.

Abstract: This invention relates to a ring form of a rigid and durable material with a metal insert arranged in its passageway. The ring is employed to strip thin walled gelatin capsules from capsule-forming pins which are slightly tapered along their entire length.

Abstract: Cup handles made from clay have their seams removed by the handle being pushed along a passage of appropriate cross-section in a sponge. The sponge is washed after use by the introduction of water into the passage and by squeezing the sponge. The invention provides for the outer surface of the sponge to be treated all over to render it at least substantially impermeable to water. In use, when the sponge is squeezed, water is expelled only from the passage, and thus the uncontrolled flow of water encountered with sponges having permeable outer surfaces is avoided. Rigid plates may cover those parallel faces of the sponge into which the ends of the passage open, the plates having slots aligned with the ends of the passage. The sponges may be incorporated in a handle de-seaming machine operating cyclically.

Abstract: Successive portions of a continuous polymer filament are plasticized such as by localized heating with ultrasonic or thermal energy, and the plasticized (plastified) portions are molded in one or more cavities to form articles such as slide fastener elements. Additionally there is disclosed the attachment of a thermoplastic slide fastener coupling element to the edge of a tape by surrounding the leg portions with walls of cavities in a pair of ultrasonic members and applying ultrasonic energy through energy directing projections located centrally within the cavities to the pair of legs to fuse the legs to the edge of the tape.

Abstract: A device for finishing a wet plaster surface is disclosed. The device of the present invention comprises a finishing tool holder which includes a handle engaging lower end. An upper end of the holder broadens to a planar fan shape, and the upper end is notched to create a step. A filler piece complementary to and substantially filling the notch is inserted therein. A threaded fastener proximate a lower end of the notch secures a lower end of the filler piece to the handle. A pair of spaced apertures near the upper end of the holder are aligned with a pair of spaced apertures in the filler piece, and a pair of threaded fasteners engage the aligned apertures to secure a variety of surface finishing tools to the holder. The surface finishing tools which are directly attachable to the handle include an elongated brush, a variety of trowels with various widths and edge forms, and a circular or star-shaped cup.

Abstract: A method of and apparatus for injection molding solid steel-banded industrial rubber tires wherein a steel band is inserted in the bottom mold member cavity when the top mold member is in open position. Bite ring and knockout member components are contained in mold member cavity recesses. Closing movement of the mold members to mated position seals the bite ring and knockout member components against the steel bank and mold member recess surfaces to prevent leakage of injected rubber compound from the cavity during injection and curing. The mold has an internal wedge member which expands a split ring against the steel band when the mold is closed to prevent band distortion from pressure existing when the mold is injected and the rubber is cured therein to form the tire tread portion which is bonded to the steel band during curing. Mold components knock the cured tire out of the top mold member upon opening the mold.

Abstract: This disclosure relates to a method of manufacturing a pipe having a rubber lining within a layer of looped fabric and a resin layer.The method comprises placing a tubular layer of unvulcanized rubber on an expansible mandrel, then wrapping a layer of looped fabric on the rubber layer, with the loops outwardly directed. The mandrel is expanded to draw the looped fabric partially into the rubber, the protruding loops then being impregnated with uncured thermosetting resin, and glass fabric is then wrapped on the resin.

Abstract: Methods and apparatus are presented for continuous-line manufacture of composition board from furnish which is moved in a continuous-flow manner through a processing line and distributed for deposition at a uniform rate over a preselected area to continuously form a mat for compaction.Commercially economical production flow rates are achieved with a lightweight refined wood furnish to form fiberboard having directional properties without relying on pneumatic impulsion while uniformly distributed furnish is delivered substantially free of air turbulence effects enabling fiber orientation by means of an electrical field.Control of movement and accurate metering of furnish are facilitated by continuously over-feeding furnish into the processing line and returning excess furnish as part of an initial distribution of furnish over one dimension of the mat to be formed.

Abstract: A powered jointer having a scoring undersurface for forming a stress joint in a wet concrete slab, followed by a reciprocating tamper foot which forms a stress joint while moving rock out of the joint and a smoothing tip following the formation of the stress joint for smoothing out the same, all in a single pass.

Abstract: The disclosure is of a method and means for applying a flowable coating material, such as relining, to a tubular stack; e.g. chimney, flue or the like, by means of a distributor moved upwardly into the stack while supplying coating material to an upper surface of the distributor which is configured to cause the material to flow outwardly to the wall to adhere thereto. The apparatus includes selectively added extensions for moving the distributor incrementally through the length of stacks of considerable height, preferably by means of power-operated means; e.g., a fluid-pressure device.

Abstract: There is disclosed a method for the imprinting and decorating rotomolded products. The method comprises the application to the interior surfaces of the mold of a viscous suspension of pigment in a preselected pattern. The suspension is applied to the mold surface in an oil carrier using a vegetable, animal or mineral oil that is inert under the molding conditions and that has a sufficient viscosity at the molding conditions to maintain the film on the mold surfaces. The pattern of the pigment suspension is applied by spraying, brushing, screen printing and the like and, after its application, the conventional rotomolding can be practiced. In this method, the powdered plastic, typically high density polyethylene, in powder form is charged to the mold, the mold is closed and placed in an oven heated to from 500.degree. F. to about 800.degree. F.

Abstract: Method for correcting deflection of a plastic roll under conditions of use. A drilled roll for processing thermoplastic material such as vinyl or the like is deflected during the use due to a thermal distortion to cause a thickness fluctuation in the rolled products. To extinguish this deflection, the roll is corrected by a process having the steps of heating the roll up to the operating temperature, measuring the amount and direction of the deflection of the heated roll, cooling the roll to the room temperature, mechanically imparting to the roll a deflection of the same amount and direction as those observed in the heated roll, and processing the roll by grinding the roll in the mechanically deflected state. After the processing, the roll exhibits an apparent deflection of the same amount in the opposite direction to those exhibited in the heated state, as it is relieved from the mechanical deflecting force.

Abstract: In the manufacture of a protective glove, there is provided a mold having two parts interconnected to be moved into open and closed positions. There is also provided an inner glove lining, and each part of the mold is covered with it. The mold, in closed position, is dipped in a bath of protective coating material, removed therefrom, and exposed to initial draining of an excess of coating material. Thereafter, the mold is opened and the draining is completed, while portions of the coating material are retained and gelled.

Abstract: Method and apparatus for forming and laying paving blocks in which interchangeable grids are provided of dissimilar configuration comprising a plurality of mould cavities each enclosing one or more fixed centers of the modules of the pattern, whatever is in the conformation of the said grids. The modular and transformable ramming assembly comprises a plurality of fixed securing points distributed to correspond to the fixed centers of the modules of the mould pattern and intended for the removable fitting of ramming plates of forms and dimensions analogous with those of the underlying cavities of the selected grid. The changing of forms and/or dimensions of the moulded paving stones or slabs is effected by replacing one grid by another differently conformed grid and by fixing new removable ramming plates corresponding to the forms and/or dimensions of the cavities of the new grid, by means of the said fixing points.

Abstract: This invention relates to a method and apparatus for fabricating continuously a solidified elongated rod or hollow shapes of various geometric cross sections of fiber reinforced plastic having a smooth surface. A plurality of strand-like fibers are wetted with a liquid, heat-hardenable plastic, the fibers are collected together into a plastic-wetted bundle, the bundle is continuously, in intermittent steps, passed through an elongated die, the die being heated in sequential zones of progressively increasing temperature so as to harden the plastic by the time the bundle emerges in rod form from the die. The bundle is moved through the die intermittently, dwelling for a predetermined time at rest, then moved an incremental distance, permitted to dwell again, until the hardened bundle eventually emerges from the die. The various heated zones of the die serve to initiate and carry the hardening of the plastic to a predetermined point at which the bundle is moved and the cycle is repeated.

Abstract: The present invention relates to a method for use in creating a prosthetic denture device such as a denture component formed of a set of hard teeth bonded within an adjustable frame assembly. The frame assembly may be completely or substantially formed having adjustable frame portion which is formed from a composition that is centrifugally cast, and which when cured becomes rigid but not completely polymerized and therefore capable of being subsequently remolded with finger pressure when elevated in temperature. In this manner the adjustable frame portion is remoldable and conformable to desired portions of the oral cavity in the creating of an artificial denture.

Abstract: A method of producing a composite structure consists of winding a resin impregnated filament tow onto a former or formers having surfaces which correspond with a portion of the finished article, removing the fibre sheets from the former or formers, and placing them in a mould which corresponds in shape to that of the complete article, and pressing the fibre within the mould to consolidate the finished article.

Abstract: Highly purified metal halide salts are made into a frangible stick having uniformly spaced lines of weakness which permit the stick to be broken readily into cylindrical pellets of uniform size. The pellets are particularly useful to supply the vaporizable fill in high intensity metal halide discharge lamps. The stick is formed by intermittently loading salt powder into the sized entrance to a channel through which the salt is forced, and compressing the charge against the back end of previously formed salt stick by means of a polished plunger.

Abstract: The invention provides a method of improving the gastightness of a seal formed between two components consisting of a closure cap applied to seal a container. An ultrasonically vibrating horn is applied to the closure cap to heat the sealing surfaces of the closure cap and container. As the cap and/or container are formed of thermoplastic material, the ultrasonic heating softens the sealing surface of one of the components and causes it to mould into close conformity with the complementary sealing surface of the other component with the effect that the gastightness of the seal between the two is improved. The application of ultrasonic heating energy is discontinued before any significant welding between the two components can occur.

Abstract: A method of making sole by laminating a foamed rubber sheet and a solid rubber sheet is disclosed. The lamination of these sheets can be effected without the use of any adhesives or glues and can obtain an excellent interlayer bonding effect.