Abstract: A lens has two or more layered sections of thermosetting material, and a substantially homogenous formation in which at least one of the layered sections has an active photochromic material present. The article is made by: forming a mould cavity from first and second mould halves; loading the mould cavity with a first thermosetting material; partially curing that material; changing the second mould half to define a subsequent mould cavity in which the partially cured material is present; loading the subsequent mould cavity with a subsequent thermosetting material; and curing the first and subsequent thermosetting materials. At least one of the thermosetting materials is loaded with an active photochromic material.

Abstract: An apparatus including of a mold for slush molding articles of a least two colors; a tank; a separation wall disposed in the tank and dividing the tank into two spaces; a gasket mounted on a free edge of the separation wall which faces the mold, the gasket having a plurality of rigid inserts disposed therein in a predetermined distribution; and an actuator device which expands and retracts the rigid inserts thereby correspondingly expanding and retracting the gasket. A method for slush molding utilizes the apparatus.

Abstract: A new and useful process for producing a plastic article (e.g., vinyl siding) with an accent color pattern incorporated therein, and a specially formed accent color pellet which is useful in such a process. The process contemplates extruding a plastic product from a base compound formed of powder sized particles and specially formed accent color pellets. The accent color pellets are alloyed masses of resins and pigment which are larger than the powder particles of the base compound, and have a higher deflection temperature than the base compound. The alloyed pellets are designed with controlled heat deflection characteristics. During the extrusion process, the accent color pellets begin to soften and disperse later than the base compound, and cause restricted dispersion of the accent color into the base compound, thereby producing accent color streaks in the resulting extrudate. The process is particularly suited for producing a simulated woodgrain or streaking effect in plastic. (e.g., vinyl) siding.

Abstract: A method of producing a patterned shaped article includes the steps of constituting a patterning form by disposing at a prescribed position within a main form for molding the shaped article an auxiliary form of a configuration appropriate for a pattern to be formed, charging a dry material for pattern formation into the patterning form at a prescribed form cavity portion thereof, charging a base-course material for forming the base course of the shaped article into the remaining space of the patterning form not filled with the pattern material, removing the auxiliary form, causing the pattern material and base-course material charged into the patterning form to set into a shaped article, removing the shaped article from the main form and, optionally, sintering the shaped article.

Abstract: A method of producing replicated paving stone including a base having a shaded and stratified layered upper surface with a plurality of simulated grout lines formed therein including the steps of preparing a cementitious mortar, applying a release agent to the interior of a forming mold, pouring the cementitious mortar into the forming mold, leveling the mortar, vibrating the forming mold and cementitious mortar therein, allowing the cementitious mortar to cure forming a base with an upper surface, releasing the base from the forming mold, applying an acid stain to the base, allowing the acid stain to etch the base to shade the upper surface, accenting the plurality of simulated grout lines with a pigment and sealing the replicated paving stone with an acrylic polymer sealer.

Abstract: The present invention provides an injection molding die unit having a simple construction and an injection molding method employing the injection molding die unit and capable of molding a composite molding in a short cycle time. After molding a first molding (70), a male die (30) is moved together with the first molding (70) by a distance (Gb) in direction (L) and, at the same time, a movable female die (14B) of a composite female die (14) is moved by the same distance (Gb) in the same direction (L) by a coil spring (29) to form a space (72) between the male die (30) and the composite female die (14) consisting of the movable female die (14B) and a fixed female die (14A), and a second molding material is injected into the space (72) to form second molding (80).

Abstract: A polymeric skin can be molded by heating a mold surface to a temperature sufficient to melt a casting material and controllably projecting particles of the casting material toward the heated mold surface. Particles of the casting material that impinge on the mold surface melt and adhere to the mold surface. The mold surface is cooled to a temperature at which the casting material solidifies to form a skin. By varying the amount or type of material projected toward the heated mold surface, the method can make multilayer skins, skins from more than one material with a graded transition between materials, multicolor skins, and skim having a controlled, nonuniform thickness.

Abstract: A method of producing a patterned shaped article includes the steps of disposing at a prescribed position within a main form for molding the shaped article a cell form having a plurality of cells arranged in a contiguous manner, charging a prescribed amount of dry pattern-course material for forming the pattern course of the shaped article into prescribed cells of the cell form, charging a base-course material for forming the base course of the shaped article into the remaining space of the main form not filled with the pattern-course material, removing the cell form, causing the charged pattern-course material and base-course material to set into a shaped article, removing the shaped article from the main form and, optionally, sintering the shaped article.

Abstract: An apparatus for making aromatic heterocyclic polymeric fibers having enhanced compressive strength is disclosed. Individual polymeric fibers, while being made according to otherwise conventional methods, are full twisted as they are drawn from a spinnerette hole so that their internal fibrils and microfibrils become entangled. The twisting is performed before coagulation of the fibers. The entangled fibrils and microfibrils are believed to provide mutual support to adjacent fibrils/microfibrils to resist buckling under compression.

Abstract: A play ball having visually distinctive colored patches distributed over its exterior. Portions of the ball exterior may be uncovered with patches, and have a color distinct from the color of patches. Regions of different tactile patterns are impressed on the ball, and these regions may match all or parts of differently colored patches. A method of making a game ball with patches on its exterior.

Abstract: Artistic tile designs are mass produced with precut tile pieces from commercially available square tile units. An initial tile design is created with the tile pieces to serve as a pattern. Thereafter the tile designs are reproduced by placing a transparent, semi-transparent or translucent sheet-type substrate or backing over the initial design, and by securing matching tile pieces to the substrate, as viewed through the substrate. The substrate is of the type that is sufficiently rigid to substantially maintain its shape while handled. The tile design can be repeated on the reverse side of the substrate using the design on the front side as the pattern to provide a double-sided design. If an opaque substrate is to be used, the front faces of the tile pieces are temporarily secured to a readily removable substrate, and the adhesive is thereafter applied to the back of the tile pieces to be permanently mounted.

Abstract: Simulated granite articles manufactured by coating a mold with a gel coat and then a spray composition including a gel coat material and crushed natural granite, crushed synthetic granite and mixtures thereof. Backing material fills the remainder of the mold. Gel coat and crushed synthetic granite may be sprayed directly on the mold, with a modified spray gun being used to efficiently and uniformly spray the granite composition.

Abstract: A sign having a raised message-defining image which may be read by sighted individuals and a series of raised dots presenting a corresponding encoded message in Braille characters, wherein the visually observable message is flat and has relatively sharp outlines so that it can be readily seen, whereas the Braille characters are of dome shaped configuration that fully comply with Braille specifications. A visually impaired person may touch and decipher the Braille characters and also feel the relatively sharp outline of the message intended for visual observation in order verify the content of the dual medium message of the sign.

Abstract: A thermoplastic tube, and method for forming such a tube, has a tube body portion formed from an inner layer of thermoplastic material, a barrier layer, and an outer layer of thermoplastic material. The outer layer does not extend completely about the periphery of the tube body and a strip of thermoplastic material having the same composition as the inner layer, fills each gap in the outer layer to form a smooth surface about the tube. The strip may be transparent or of a color different than the color of the outer layer. In a preferred tube, a first layer of adhesive material is provided between the inner layer and the barrier layer, and a second layer of adhesive material is provided between the barrier layer and the outer layer and strip.

Abstract: An EVA insole manufacturing process includes a step of mixing an EVA resin with a foaming agent for producing a molding through squeezing and cutting procedures, and a step of heating the molding thus obtained in a mold so that it forms into a predetermined shape. Two or more moldings which respectively contain a different concentration of foaming agent or a different pigment color may be molded together so as to produce an insole which has different hardness and color at different parts thereof.

Abstract: An apparatus and process for manufacturing multiple thin walled hollow shells for parts such as automobile door panels, arm rests, and instrument panels from thermoplastic plastisol includes a pair of plastisol charge boxes each forming a separate compartment and members for joining the charge boxes with an open ended mold. The mold has a divider rib thereon that is inaccessible by straight vertical engagement of a seal assembly on the divider. An indexable divider wall is operatively connected between the charge boxes so that the divider wall can be selectively extended and retracted at an angle with respect to the vertical and against the mold at the divider rib thereon for allowing separation of the casting surfaces having different colors fixed thereon and the subsequent fusing of the casting surfaces to one another at the divider.

Abstract: The present invention provides a new and improved method for manufacturing vehicle interior trim panels such as door panels and instrument panels in which different regions of the trim panel have different colors or other aesthetic characteristics. Two pieces of sheet vinyl having the desired color or other aesthetic characteristic desired in the manufactured trim panel are cut to shape and then bonded together edge-to-edge to form a composite two-tone vinyl sheet. This composite vinyl sheet is draped over a mold having a blade projecting from the mold surface. A retainer is installed onto the backside of the composite vinyl sheet to attach the composite vinyl sheet to the blade and thereby hold the vinyl in place with the bond between the two sheets located at the apex of the blade. The mold is closed and urethane is poured against the backside of the composite vinyl sheet to encapsulate the retainer.

Abstract: A process for manufacturing mouldings with the appearance of natural stones from a composition including a coloured or colourless thermoplastic resin matrix and, per 100 parts by volume of this matrix, 0.2 to 80 parts by volume of at least two fillers chosen from natural fibres, carbon fibres and mineral fillers having a different grain size or dimensions. By chosing the color of the matrix and the number, proportion, grain size and color of the different fillers, the general appearance and colors of a natural stone may be imitated. The mouldings obtained after working may be used due to their aesthetic appearance, particularly as packaging for cosmetic products.

Abstract: The present invention relates to a method of manufacturing molded polymer articles comprised of casting resins and having color-differentiated surface regions, wherein prior to the charging of the casting resin, a surface region of the molding implement is coated with a hardenable coating of a colorant-containing composition, producing color-differentiation in the surface of the molded articles. The designated surface regions of the molding implement are coated with at least two layers, whereby, according to the present method, the first coating step applies a filler-containing coating dispersion (L-1) without added colorant, and the second coating step applies a colorant-containing coating (L-2) without filler. Thereafter, the coating layers are dried, the casting resin is charged to the molding implement, the resin is polymerized by heating, and the molded articles removed from the mold.

Abstract: In the course of producing a multicolored slush skin in accordance with the powder-slush method, individual one-piece slush skins are produced in successive process steps, which extend over the entire mold, which is divided into individual color zones by means of separation fins. After the first slush skin with the first color has been produced, the area assigned to another color is cut off and this part taken out of the mold, the other part of the slush skin remaining in the mold. Subsequently a complete second slush skin is formed in the previously emptied partial area as well as in the area of the remaining first slush skin, etc. A multicolored slush skin, looking from the grain side, then is the result after it is finally taken out of the mold, which is distinguished by an exact and visually tidy separating seam between the individual color areas.

Abstract: A method and process for computer-controlled manufacture of three-dimensional objects involves dispensing a layer of liquid, insoluble material onto a platform at predetermined locations, which then hardens. A second media, preferably water soluble, is then sprayed onto this layer to thereby encapsulate the hardened insoluble media. The uppermost surface of this encapsulant is planed, thus removing a portion of the encapsulant to expose the underlying insoluble material for new pattern deposition. After the resulting planing residue is removed, another layer of liquid, insoluble media is dispensed onto the planed surface. The insoluble media can be of any color and may vary from layer to layer, and from location within a layer to location within a layer. These steps are repeated, until the desired three-dimensional object, surrounded by a mold, is completed. At this point, the object is either heated or immersed in a solvent, thereby dissolving the mold and leaving the three-dimensional object intact.

Abstract: The invention concerns a homogenous, in particular multicolored plastic sheet or panel, based on ethylene vinyl acetate copolymer (EVA) as binder with a filler content of 30 to 80 wt. % and a process for producing it. In other embodiments the binder contains, in addition to the 70 to 85 wt. % of EVA, polypropylenes to improve the processability (tendency to adhere), EPDM to improve the flexibility, and polyethylenes to reduce the tendency to soiling. In the process described, several additives, each consisting of a binder containing at least some ethylene vinyl acetate copolymer, up to 80 wt. % of fillers and up to 5 wt. % of pigments, are mixed, plasticized and granulated or comminuted to form granules or chips of assorted colours which are mixed and, possibly after other processing operations, pressed to form the plastic web or plates.

Abstract: A manufacturing method for potteries which mixes decorative raw material liquids within a container or on a flat surface to produce natural and dreamy stripe-patterns or scroll-patterns. Such patterns are transferred to a sheet material having water absorptivity for transferring to a molded article prior to baking. When the mold is baked, the natural and dreamy stripe-patterns or scroll-patterns are applied onto the resulting pottery. The patterns produced by this method are free from creation of pin holes, bubbles and relatively large recesses.

Abstract: A method for moulding a two-colored material includes moulding a gasket such that it has a profile which is approximately the same as a profile of one of a plurality of possible corresponding regions of the inner surface of a mould. In addition, a rigid material is embedded in the gasket and the gasket is fixed to a separation wall. The gasket and the separation wall are then inserted into the mould with the gasket being aligned along the one of the plurality of possible corresponding regions of the inner surface of the mould, such that a seal between the inner surface of the mould and the separation wall is formed and first and second half-spaces are defined within the mould. The gasket is compressed against the inner surface of the mould to improve the sealing therewith and slush moulding of a layer of a first colored material within the first half-space is performed. The layer of the first colored material is consolidated and the gasket and the separation wall are removed from the mould.

Abstract: A spin pack for spinning multiple components includes a distribution device which distributes mutually separated molten polymer streams to a spinneret so that each mutually separated molten polymer stream is accessible at each active spinneret backhole. Intermediate the spinneret and the distribution device, a selection assembly selects which, if any, mutually separated molten polymer stream flows into which backhole.

Abstract: The present invention is a contoured wall and method for creating the contour and appearance of a wall formed from individual assembled units such as stones. The wall is formed from a plurality of interlocking wall portions that each have at least two non-linear mating surfaces. Each of the wall portions further has a lateral face contoured to resemble the stone wall. The wall is formed from hardenable construction material such as concrete poured between two mold members. Each of the mold members has a lateral mold face with at least one of the lateral faces having a plurality of interlocking contoured relief portions to provide a molded surface having the contour of a stone wall. In one embodiment, at least one of the mold members includes a plurality of individual form liners, or mold modules, each of which includes two non-linear mating edges and a lateral relief mold face.

Abstract: Polyethylene resin compositions containing mottled colors and a process for their production, includes forming a colored resin by hot melting the resin together with an appropriate color in an extruder. The colored resin is reground to about 35 mesh, and then blended with a flow additive such as zinc stearate, and preferably an anti-static powder. The blended resin is then rotationally molded along with other, different colored resin particles to obtain a final multi-colored, mottled appearance in the molded product. Different color combinations such as granite, green, red, brown, grey, sandstone, etc., can be produced, without the different colors intermixing or bleeding into each other, while still maintaining the integral molded product form.

Abstract: A method and apparatus (10) is provided for producing vinyl siding (76) having aesthetically pleasing, wood-like striations embedded therein. Apparatus (10) includes processing structure (12) for processing topcoat compound and substrate compound extruders (18, 20) respectively. Acrylic colorant is discharged from feeders (64, 66) into barrel (34) via adapter (72) and thereby mixed with the topcoat compound. The interval of discharge is four seconds every twenty seconds. Adapter (72) utilizes a water jacket to keep colorant cool prior to its introduction into barrel (34) where it experiences a temperature sufficient for melting, usually about 380.degree. F. Due to the interval of discharge and the twenty second period thereof, striations (82) are uniform and continuous in nature so as to simulate wood grain.

Abstract: In a method of feeding a plastic material to a using apparatus such as a molding press or an extruder, a moldable or extrudable plastic material in elongated strand form is provided. The moldable or extrudable plastic material is arranged such as in a package comprising a plurality of convolutions. The package is supported adjacent to the using apparatus and successive increments of length of the elongated strand material are payed out and fed into the using apparatus.

Abstract: A molding method of making a porcelain figurine having marble-like or variegated characteristics on its surface and throughout its thickness is disclosed.

Abstract: A method for printing a letter, character or a figure on an inner ear type headphone, which is a molded body of a thermoplastic synthetic resin, by irradiating the surface with a laser light, and a headphone housing on which the letter etc. has been printed by the above method. The printing is performed by irradiating the surface of the synthetic resin molded body with a laser light for expanding any moisture or air contained in the molded body for foaming the surface. Printing is achieved in the form of foamed regions of the synthetic resin and hence is clear and superior in abrasion resistance and durability.

Abstract: An assembly (10) for molding a two-tone color plastic shell (12) includes a divider wall (42) having first and second sections (42a) and (42b) that are interconnected for lateral adjustment therebetween for controlling the position of a seal gasket (60) with respect to a divider rib or division surface (36) on a heated mold (22).

Abstract: The present invention is a contoured wall and method for creating the contour and appearance of a wall formed from individual assembled units such as stones. The wall is formed from a plurality of mating form liners each having a reciprocal contoured surface to that of the desired stone wall. The wall is formed from hardenable construction material such as concrete poured between two mold members with the form liners attached to at least one of the mold members. Each of the form liners has a lateral relief mold face adapted to provide a molded surface having the contour of a stone wall. Each lateral relief mold face of the form liners has a latticework non-linear mortar-forming interlocking portion surrounding stone-forming recessed portions. The form liners ar positionable in a plurality of arrangements wherein the interlocking portions and recessed portions along the mating edge of each form liner mate along the mating edge of the adjacent form liner to form a continuous lateral relief mold face.

Abstract: A two tone plastic vehicle door shell (10), FIG. 1 has a front surface (12) and a side surface (14) separated into two tone segments (18, 20) (18a, 20a) by an integral two tone trim line (22). The shell's side surface is joined to a return flange (16). The return flange is arranged generally parallel to the front of the shell and includes a side flap (26) thereon which covers a cut-out opening (24) in the return flange on either side of the trim line at the side of the door. The cut-out opening (24) is provided for removing a seal and divider wall assembly from the door shell when thermoplastic powder is cast on a heated mold to form the shell. A tool FIG.

Abstract: A data processing method of an injection molding machine detects predetermined physical amounts, for example, filling velocities V1, V2 and V3 relative to operations of a plurality of injection apparatuses successively when different materials to be molded are injected into a cavity of a single mold from a plurality of injection apparatuses to fill the cavity so that molding is performed, calculates a characteristic data concerning the sum total of the detected filling velocities V1, V2 and V3, and processes data on the basis of the characteristic data. The axis of abscissa of the characteristic data can take a time or a total capacity of the material successively filled into the mold. The data processing includes display processing for displaying the characteristic data with a graph and the displayed characteristic data is utilized for setting the molding condition and the data analysis.

Abstract: The present invention feeds a plurality of different molten resin jet streams into a T die adapted to produce film members such as plastic films. A plurality of molten jet streams extruded from a plurality of extruders, respectively, are fed from their predetermined directions into one resin feed passage in communication with the T die and combined or united without causing the mixture with each other. The relative positional relationship between the intersurfaces between the adjacent molten resin jet streams defined when the molten resin jet streams are combined or united on the one hand and an elongated discharge port of the T die can be adjusted so that the relative positional relationship between a plurality of extruders and the T die can be freely changed.

Abstract: A method of making a multilayer plastic article by forming a multilayer stream of diverse thermoplastic materials and injection molding the multilayer stream directly into the article. The multilayer stream can be formed by coextrusion of the materials or by coextrusion followed by layer multiplication in one or more interfacial surface generators/static mixers. The coextruded stream, or a multiplied stream from the one or more ISG's, can also be divided into substreams and the substreams thereafter recombined prior to being injection molded so that the layers in one such substream are angularly oriented with respect to the layers in another substream.

Abstract: A method of moulding an article having areas of color contrast on the surface comprising coating one surface of a mould with a colored composition prior to filling the mould with a curable composition of contrasting color and curing the composition characterised in that the colored composition comprises at least 25% by weight of(a) a fluid carrier comprising a mixture of 0-100 parts by weight of a polymerizable liquid and correspondingly 100 to 0 parts by weight of a non-polymerizable, volatile, organic solvent,(b) from 0.1 to 10% by weight of the total composition of a colorant in the form of an inorganic pigment or carbon black, or 0.0001 to 1% by weight of an organic pigment or dye,(c) from 0 to 60% by weight of the total composition of a finely divided filler, preferably having a mean particle size of less than 2 microns,(d) 0.

Abstract: A method and apparatus for the preparation of multicolor, multidensity and/or multithermoplastic foam and products composed thereof. Heat-plastified foamable gels of a thermoplastic resin or resins containing blowing agents are combined and extruded simultaneously through the same orifice of a die and expanded into a foam. The color, density and/or thermoplastic resin of the secondary foamed gel or gels can form a multitude of patterns or shapes that include waves, diagonals, stripes and/or continuous coverage over the entire surface of the primary foamed gel. These patterns or shapes can be on the surface and/or within the cross-section of the primary foamed gel.

Abstract: A mold for forming a magnetic tape cassette and a method for multi-color molding a magnetic tape cassette or the like. Sprue-runners connected to submarine gates used in making at least portions of the cassette are formed with notches near the submarine gates to reduce the cross-sectional area of the sprue-runners. As result, the sprue-runners can be easily cut off from the body of the cassette by breaking the notched portions.

Abstract: A process for forming a poured slab, preferably of concrete, which has different colored portions. The process includes (a) pouring a wet concrete mixture of cement particles, sand particles and gravel particles into a horizontal mold cavity having a stepped mold bottom surface, (b) curing the mixture to produce a slab with a roughly horizontal rear surface and a stepped front surface corresponding to the mould bottom surface, and (c) mechanically removing the cured mixture between a cut plane generally parallel the rear surface through the slab and the front surface. The resultant slab has different portions with different coloration and appearance due to the cut plane passing through portions of the concrete having different proportions of cement, sand and gravel particles.

Abstract: A method of manufacturing a randomly patterned floor covering having contrastingly-colored zones from a preform of rubber in which the preform is cut in pieces, each of which are molded into a blank having projections extending from a top side of the blank in relief-like fashion, solidified by vulcanization and then machined by cutting only in the region of the projections. The rubber forming the contrastingly-colored zones is mixed with contrastingly-colored particles in an amount of at least ten percent by weight. These particles are substantially free of flat surfaces and are in, at least, an advanced state of vulcanization. The particles located in the projections extending from the top side of the blank are exposed during the cutting step.

Abstract: An apparatus and process for making extruded colored thermoplastic resin sheets is shown and described. In this process, a colored thermoplastic sheet material is encapsulated within a clear material. The colored material as it merges with the clear material is subjected to a clear material flow direction vector which causes the colored material to spread or become wider than the color material orifice. The spreading due to clear material flows in a widthwise direction produces a uniform taper to the colored edge, and the point at which the colored material stops and the finished product is barely perceptible. In this apparatus, a clear flow thermoplastic extrusion die has placed within its manifold a colored material distributing inner pipe which has an orifice for inserting color material into the flow of the clear material. The color insertion occurs at a point where the clear material has a flow vector in the widthwise direction and towards the clear portion of the finished product.

Abstract: Process for the production of a film, at least one side of which is provided with a silicone layer, where the film is produced by the coextrusion process and has at least three layers, one outer layer of which consists of silicone, under which a colored intermediate layer is located, on the side of which opposite the silicone layer a further preferably white layer is provided.

Abstract: An EVA insole manufacturing process includes a step of mixing an EVA resin with a foaming agent for producing a molding through an injection molding process, and a step of heating the molding thus obtained in a mold so that it foams into a predetermined shape. Two or more moldings which respectively contain a different concentration of foaming agent or a different pigment color may be put together in a common mold and subjected to integral foaming and form setting process, so as to produce an insole which has different hardness and color at different parts thereof.

Abstract: Plasticized polyvinyl butyral sheet optionally containing a gradient color band is formed by continuously extruding a sheet having a predetermined region across its width formed from melt issuing from a die at an increased mass flow rate in comparison with other portions of the melt forming the rest of the sheet and then forwardly distorting such sheet immediately after forming by preferentially stretching the side containing the predetermined region to form an arcuate shape of substantially uniform thickness. Arcuately shaped sections are then cut from the sheet to form discrete, shaped interlayer blanks having improved thickness uniformity and dimensional stability providing improved performance when used in laminated safety glass.

Abstract: A method for producing an extrusion having a wood grain appearance. A first extruder including a die and a second extruder which includes a housing and a screw is provided, the screw having a portion disposed within the housing and a portion projecting outwardly from the housing. The second extruder is secured to the die of the first extruder by a pipe, the pipe receiving the outwardly projecting portion of the second extruder screw. A first material is extruded through the first extruder die to produce an extrusion and a second material is introduced into the second extruder. The second material is delivered through the second extruder and the pipe means to bond the second material to at least a portion of the surface of the extrusion to provide an extrusion with at least a portion of its surface having a wood grain appearance. An associated second extruder as well as an apparatus for producing an extrusion having a wood grain appearance is also provided.

Abstract: A method and apparatus for molding plastic articles in two colors, particularly, the bodies of magnetic tape cassettes, in which a strong bonding force is provided between the two portions without having to form a recess and projection on the joining edges of the two portions. A slide core, which is moved in and out of a primary molding cavity between the molding of the two portions of the article, is provided with a tubular passage having an opening within the primary molding cavity along edge portions of the slide core. The slide core is fully inserted into the primary molding cavity to mold the first portion, then partially withdrawn to form a secondary molding cavity in which the second portion is subsequently molded. After molding the first portion, an adhesive is injected through the tubular passage along the edges of the first portion which will join corresponding edges of the second portion to thereby firmly join the two portions.

Abstract: A method is disclosed of making in a mould cavity objects having an outer wall from a micro-cellular or non-cellular elastomer (7) and a core consisting at least partly of a synthetic foam (9), including the following steps: in a first step, a layer (7) of the elastomer is applied by spraying onto the surface (1) defining the mould cavity, and then, in a second step, before the elastomer is completely cured, a reaction mixture for obtaining a synthetic foam (9) is injected in the thus by the formed elastomer layer (7) defined space (8) of the mould cavity and wherein, in a third step, after the synthetic foam (9) has been cured substantially completely and forms a whole with the elastomer layer (7), the thus obtained object is demoulded.

Abstract: A new process for producing a reproduction of a painting or the like wherein the reproduction has a relief surface which imitates the relief surface of the painting or the like. Heat and pressure are applied simultaneously to an assembly consisting of a mold of the painting, a colored sheet for coloring the reproduction and a substrate to retain the reproduction. Subsequent to this step, shock cooling is applied. The reproduction thus produced does not suffer from the rebound effect of the prior art and good color integrity is maintained.