Abstract: A process for fabricating hollow, foam-filled, reinforced plastic objects such as surfboards. The process involves disassembling a multi-part mold to expose its inner surface. The inner surface is then coated with a gel coat, resin and reinforcing material and assembled into two mold halves. A prefoam material is injected into each mold half which is then capped with a baffle. The foam is then permitted to rise, and a portion of the foam is forced through the baffle. The baffle is then removed and a certain amount of the foam is removed. The two mold halves are joined and a center joining resin is poured in this depression and allowed to cure.

Abstract: An inventive apparatus for molding a toothed pulley is equipped with an upper plate, a lower plate, and a punch attached to the bottom surface of the upper plate for vertical movement, in which a die holder is provided on the lower plate, and a plurality of dies, formed to include tooth molds having different, increasing tooth heights from one die to the next, are arranged vertically in the holder.

Abstract: A molded, ceramic belt buckle including a molded ceramic body and integrally molded metal alloy eyes and a belt hook, and the method and mold for forming the ceramic greenware. A sequentially operated, six piece mold is employed to form the ceramic greenware in the desired belt buckle shape, including the metal alloy eyes (that fasten the belt harness) and a belt hook. The ceramic greenware is fired in a kiln to form a ceramic bisque that is ready for decoration. A specially shaped harness is coupled to the eyes for attachment to a belt. The belt buckle shaped ceramic bisque can receive secondary molding for individualized styling such as the addition of a particular name.

Abstract: An apparatus for producing a cage made of castable or injection moldable material for cylindrical rollers in which the pockets of the cage are defined by webs having projections projecting into the pockets at their longitudinal sides for radially retaining the rollers comprising slide plates radially moveable for forming the roller pockets, each slide plate being formed of several partial slide plates, the end faces of the slide plates having cover plates arranged thereon to cover the connection juncture between the partial slide plates and secured to one of the partial slide plates.

Abstract: A mold for the base of a dental model includes index means cooperative with a dental model articulator, detachable perimeter members for defining the side walls of the base and an insert for delineating a platform upon which a tooth die is attached. The insert is reversably mountable to accommodate relocation of the platform as a right or left quadrant. A variant includes a flexible rubber mold which defines a quadrant or a full base, each including index means and having a platform for supporting the respective tooth die. Forms for making the flexible molds are also described.

Abstract: A two part airfoil stagnation point mold which when the airfoil is formed therein and the two molds are separated, the residue or seam formed along the leading edge of the airfoil is positioned in a less sensitive stagnation area of the airfoil and the efficiency of the airfoil is thereby improved.

Abstract: An apparatus is provided for precision forming plastic insoles for use in the mass production of shoes. An injection mold structure is shown and a method of assembling the finished insole together with a unit sole structure is described.

Abstract: An injection mold for coaxial cable joints comprises a longitudinally split inner sleeve of duralumin which is placed around the cable joint and a longitudinally split outer jacket of steel. The outer jacket has a bore closely fitting the inner sleeve. The two halves of the outer jacket are readily assembled and disassembled by the use of axially engaging dovetails. The sleeve and jacket have cooperating filling and vent holes and the outer jacket is formed with integral heating and cooling channels.

Abstract: Mold for making a tooth positioning and retaining appliance with air holes including a cavity having models of the upper and lower teeth arranged so that when an appliance is molded thereby the appliance will have upper and lower archways for receiving upper and lower arches of a person, tooth sockets in the archways arranged in ideal relationship and preselected positions to urge the teeth received thereby into the preselected positions of the sockets. The mold additionally includes air hole or airway forming means extending across the models of the teeth in the mold and being insertable into the mold prior to the molding operation and thereafter removable from the mold with the molded appliance. The air hole forming means is easily separable from the appliance to ultimately define the air holes between the archways and between the labial and lingual sides of the appliance.

Abstract: Disclosed herein is a mold assembly including first and second mold members assembled together to define a mold cavity, which first and second mold members each include a peripheral surface extending outwardly from the cavity, a gasket captured between the peripheral surfaces, and one or more tubes extending through the gasket and between the peripheral surfaces to provide communication between the cavity and the atmosphere.

Abstract: A multi-part form for casting concrete structural units having spaced parallel and vertical sidewalls and horizontally spaced parallel and lateral connecting arms therebetween, the connecting arms having mortises at the bottom and tendons at the top. A stationary base and support means has upwardly exposed surfaces for forming the bottoms of the sidewalls and the arms and a core means thereon forms inner vertical surfaces of the arms and portions of inner vertical surfaces of the sidewalls of the structural unit. Opposing movable sidewall form members form outer surfaces of the sidewalls and opposed movable arm and sidewall form members form outer surfaces of the arms and inner surfaces of the sidewalls outwardly of the arms. Sidewall end surface form members on the sidewall form members form the end surfaces of the arms. Tie and strip bolts respectively secure the movable form members in inner assembled positions and urge the members outwardly in a stripping operation after casting.

Abstract: The mold according to the invention is in two opening parts. Its first part defining the lower sole face and presenting spiked holes, delimits receiving recesses shaped to complement the molded heads of the spikes and adapted to receive the corresponding heads while ensuring a perfect contact capable of preventing any of the molding material from filtering in, whereas the second part of the mold, defining the upper sole face and provided with bosses projecting opposite the said holes, comprises push-rods on the bosses conjugated with the recesses, to hold the corresponding heads in position inside the latter when the mold is closed.

Abstract: The invention relates to a mold for the production of dishes from powdered ceramic materials wherein two coaxial cylindrical dies are displaceable to generate with their end facing walls a cavity to be filled with the powdered ceramic materials, said cavity being peripherally completed by a displaceable die-box provided with a vertical conduit through which the ceramic material is fed into said cavity. An auxiliary die-box is provided sideways on said die-box, displaceable at least along one of said cylindrical dies, the lateral facing walls of said die-box and of said auxiliary die-box (16) being provided with annular grooves that in the closed condition of said lateral walls generate an annular cavity that may be registered in correspondence with said first-mentioned cavity of the mold, radially prolonging the latter and forming the peripheral border of the dish to be produced.

Abstract: Metal supports (1), are provided to rest on the ground and to removably support metal forms (2). These supports are provided with screw (4) and nut (9) means used for accurately adjusting in elevation the forms. Removable struts (16) are used to fix the gap or spacing between parallel forms and tension wires (17) going through the forms are used to secure the forms during the casting of the concrete. Means are provided to stretch and secure (20, 21) these wires with respect to the forms.This apparatus allows to make a slab of which the upper face is perfectly horizontal and at the level desired, with a minimum of time devoted to the setting in place and removing of the apparatus.

Abstract: An apparatus for casting toilet tanks from ceramic material in slip form is disclosed. A plurality of mold parts which include two side mold parts which when assembled define a casting cavity and a core part which is positioned in the mold cavity and is spaced from the mold surfaces of the two side parts to define the front back and side walls of the toilet tank. One of the side mold parts includes an integral base for forming the bottom wall of the tank. Each side mold part arranged in a general horizontal line and are shiftable longitudinally to open and close the mold unit.

Abstract: A mold having an integral piece for casting a hygienic-sanitary appliance is disclosed. The mold includes a lower mold piece, at least two lateral mold pieces which are mounted on the lower mold piece to define a molding cavity for an article to be cast. An upper mold piece is mounted in position on the lateral mold pieces to close the mold cavity; the lateral and upper mold pieces being separable from the lower mold piece and the cast article to leave the latter resting on the lower mold piece. Below the cavity of the mold there is provided an annular or partially annular shaped base to support the cast article.

Abstract: The invention provides means for producing a moulded plastics ball having the appearance of a conventional ball with a continuous curved seam. In order to make the moulding seam (parting-line) as inconspicuous as possible, the invention provides a mould assembly comprising two mould members, having mutually confronting surfaces each surrounding a part-cavity, a generally spherical mould cavity being defined when the confronting surfaces are in contact with one another, lip portions of said surface defining a continuous parting line around a diametral zone of the cavity, said parting line having four portions, comprising two substantially S-shaped portions with two at least substantially straight-line portions, said portions being arranged alternately around the diametral cavity zone, each portion of the line meeting its adjacent portion to include an angle of not substantially less than a right-angle.

Abstract: Mold for the injection molding of objects of large dimension and complicated surfaces from plastic material without internal stresses and with accurate dimension. In base plates of the mold cooling grids are embedded and the active surface of the base plates is provided with forming plates and forming strips with grooves for heating elements or tempering and cooling means. The mold is provided with mobile cores which change their positions in the course of shrinking of the solidifying plastic material.

Abstract: A two piece contact lens mold having a pair of blunt, continuous mating surfaces extending around the periphery of the mold cavity is disclosed. Location of the mold parting line tangent to the lens edge substantially eliminates registration problems when a relief groove is provided at the edge of the female member. Parameters for mold materials and important dimensions are also disclosed. The mold can produce finished contact lenses which do not require further machining.

Abstract: A first mold is made by mounting a plurality of semicircular ribs of a relatively large radius on a board in spaced relationship and centered along an arc on the board with the ribs extending generally radially of the arc and having diametral portions of their peripheries facing the board, foaming a foamable hardenable liquid resin in place between each pair of adjacent ribs, and applying hardenable liquid resin over the ribs and foam. A glass fiber reinforced outer jacket for insulation is formed on and removed from the first mold. A second mold is made similarly to the first but using semicircular ribs of a relatively small radius. The outer jacket is mounted on the second mold and the space therebetween has foamable hardenable liquid resin inserted therein to form a jacketed longitudinally curved semicircular section of foamed resin pipe insulation.

Abstract: Method and apparatus for pre-casting box-like reinforced concrete modules on assembly line. Apparatus includes pair of movable interior forms for defining the interior surfaces of side walls and ceilings whereby one interior mould at a time can be removed when concrete is in semi-cured condition. Method includes casting floor with short upstanding side wall portion to serve as guide for interior forms when moving forms onto floor slab. Method also includes use of integral multiples of four serially arranged casting beds on which various procedures for forming modules proceed simultaneously and progressively.

Abstract: A mold for casting ceramic material in slip form is disclosed. The mold comprises a plurality of mold parts of which one constitutes a seat made of a non-casting material, the other mold part or parts being made of casting plaster, a surface region of the seat, in the assembled mold, forming part of the casting cavity, which surface region is bounded by closely adjacent region of the other mold part or parts such that during casting a solid cast portion of the article is cast against the seat, the mold parts being adapted so that the mold can be opened after casting to leave the article on the seat whereby the article can be lifted away on the seat.

Abstract: A mold for molding a boot or similar footwear from an elastomeric composition and simultaneously lining the footwear with a fabric, has first and second shells each having a cavity which complements the cavity of the other to form a large cavity which corresponds to the upstanding sides of the footwear and a third shell which has a cavity corresponding to the sole thereof. The three shells are assembled together with a rigid core member enclosed therein which defines the inside of the boot. The core member has an elastically expandable casing. Conduits are arranged in the core member for conveying a fluid under pressure to expand the casing.

Abstract: A composite ski is made by bonding a metal ski top to a molded ski body during the molding and curing of the body. The ski body is placed in the mold cavity of a two-part mold, and the metal top is movably supported on the other mold part. One end of the metal top is held by a spring-biased holding pin which permits the metal top to expand and contract relative to the mold part as the mold is heated and cooled while maintaining the metal top in alignment with the cavity.

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 and assembly for molding plastic optical lenses. The mold assembly comprises an annular retainer ring supporting a pair of generally disc shaped mold parts urged toward each other by a resilient force while separated by one or more gaskets, preferably including at least one soft gasket of uniform thickness between its inside and outside diameters which has the property of softening at elevated temperatures. When the cavity formed between the mold parts and bounded peripherally by the gaskets is filled with a resin formulation in the form of a liquid which then polymerizes when raised to an elevated curing temperature, shrinking and becoming hard and insoluble at room temperature, in the process the softening of the gasket permits the mold parts, under the action of the resilient force, to move towards each other to maintain contact with the formulation as it shrinks and hardens.

Abstract: An apparatus for molding a blank of stoppers from synthetic resin, each of said stoppers including a crossbar, a filament portion and a head. The filament portion has a smaller-diameter portion near the crossbar and a larger-diameter portion extending from the smaller-diameter portion toward the head at least on a portion to be stretched.Metal mold members adapted to act as a drawing die are engaged to the connecting portion of said smaller-diameter and larger-diameter filament portions, and after the stoppers have been molded, the members forming the die are moved along the filament portion so that only the crossbars are gripped by the metal mold to prevent movement thereby subjecting the filament portions to stretching.

Abstract: Apparatus for precasting concrete products wherein dry mix is deposited in casting cavities defined by mating upper and base form sections, vibrated and/or pressure compacted, and the upper form section removed immediately for curing of a free standing green cast product. A single upper form section cooperates with a number of base sections and the latter are used to transport the green cast products for curing. Automatically separable base section parts are also employed for the transport of cured products. Forms are adapted for fork lift handling and include high intensity vibrators, sight openings for ascertaining a cavity full condition, closure plates for fill openings, pressure applying and finishing devices, and sectionalized construction for various size products. Casting machine includes mix delivery apparatus and form handling apparatus for upper and base form sections for automated casting and transfer of green cast products for curing.

Abstract: A concrete construction system and method for erecting building structures in which column casting molds are assembled from a plurality of modular, interlocking, reusable forming elements, and in which the precast columns are provided with anchoring elements embedded in one end of the column. Support footings are cast in situ using reusable form components to provide a structure accommodating direct placement of precast support columns and precast wall panels. A framework of adjustable joist assemblies provides support for construction of the roof or upper level floor structure.

Abstract: A deflector for use on an automatic molding machine deflects incoming sand downwardly onto the drag table and then upwardly into deep recesses in the pattern. The sand deflector is formed as a rectangular prism from a single block of metal, and has two deflecting channels separated by a strengthening septum. The channels are arranged at a predetermined angle in relation to the mounting surface of the deflector.

Abstract: A mold bed having a number of longitudinal mold cavities is surrounded by a reinforcement structure which permits the mold bed to be handled as a unitary product. Mold cavities have removable end walls, one at each of opposite ends, to promote releaseability of the product from the mold cavities once they are removed. The mold cavity has a trunnion, one at each of opposite ends of the mold body so that the mold body can be rotated from an upright position when it receives the concrete in the mold cavity to an upside down position whereby the products are removed of their own weight. Two transverse spaced channel straps extend across the open face of the cavity so that when the mold bed is turned upside down, the molded parts are held temporarily by the mold straps, which are then released by unbolting their connections with the mold bed. A fork-lift truck removes the molded parts ater the mold straps are removed.

Abstract: A gasket for a lens casting cell designed to accommodate for casting material shrinkage during curing in the cell.

Abstract: Comb having teeth with generally rectangular cross-sections and apparatus for making the same.

Abstract: A molding assembly for casting soft contact lenses especially such lenses formed of hydrophobic material. Such a molding assembly comprises a molding cavity defined by the dies of the assembly and an annular gasket or sealing member joining the peripheries thereof. The perimeter of largest diameter of the molding cavity is defined by contact between a sealing ridge which is part of the concave die or the gasket or sealing member and a bearing surface which is part of the other of the concave die or the gasket or sealing member.The annular gasket or sealing member may have an annular skirt adapted to embrace the concave die in the closed position of the assembly.The gasket or sealing member is carried by the convex die and may be integrally formed in one piece with the convex mold.

Abstract: A two piece contact lens mold having a pair of blunt, continuous mating surfaces extending around the periphery of the mold cavity is disclosed. Parameters for mold materials and important dimensions are also disclosed. The mold can produce finished contact lenses which do not require further machining.

Abstract: A die assembly includes relatively movable first and second dies, and a plurality of guide pin assemblies mounted on the first die and an equal plurality of aligning passageways formed in the second die for receiving the respective guide pin assemblies. Each of the guide pin assemblies includes a first section mounted within the first die, and a second aligning pin section connected to the first section. Each aligning pin section extends above the surface of the first die for entering one of the plurality of aligning passageways for aligning the first and second dies. Each aligning pin section is detachably connected to a first section and is detached after the first and second dies have been aligned and are ready to be used. In this manner, when the first and second dies are differentially heated during use, the problem of scoring or damaging the aligning pin sections is avoided.

Abstract: A container for hot consolidating powder of metallic and non-metallic composition and combinations thereof by the application of heat and pressure wherein the container includes a mass of container material which is substantially fully dense and incompressible and is capable of plastic flow at pressing temperatures, a cavity of a predetermined shape formed within the mass for receiving a quantity of powder, the mass including walls around the cavity of sufficient thickness so that the exterior surface thereof does not closely follow the contour of the cavity whereby, upon the application of heat and pressure to the container, the mass acts like a fluid to apply hydrostatic pressure to the powder contained in the cavity.

Abstract: This invention relates to an apparatus for producing a plurality of large curved concrete building sections of uniform thickness. The apparatus includes a number of forms having a concrete core and a steel casing and being of a generally crescent shaped cross-section. The forms are aligned in face to face relationship and attached together by means of end pieces to form molds. Concrete is then introduced into the molds by a ready-mix concrete truck driving on top of the assembly. After the poured concrete has hardened the forms and end pieces are stripped from the concrete building sections.

Abstract: A mould assembly for producing multiple castings in which a plurality of mould components are closely arranged together in an array and define a plurality of mould cavities. At the base of the array there is provided a regularly shaped space which communicates with each of the individual mould cavities via a runner passage and thus molten metal admitted to the space fills each of the mould cavities simultaneously leading to uniform properties in all the castings. The individual mould components are preferably injected moulded in a ceramic material.

Abstract: A unitary character-bearing disc for use with printing machines, the disc having a hub and at least a pair of radial flexible arms, the whole of these arms having their terminal ends lying in a common plane while each second arm has its root integrally formed with the hub in the vicinity of one of the faces thereof, the root of each alternate arm being disposed in the vicinity of the opposite face of the hub, the roots of the radial arms being thereby seen to be disposed in two different planes. Each arm is thicker at the root than at the terminal end thereof. The invention further describes a two-element mould for making the disc as a unitary body. One of the elements of the mould is provided with a first set of radial grooves and a second set of radial grooves, both sets having common center points, the second set of grooves being deeper than the first set, each groove of the second set prolongating inwardly of each second groove of the first set.

Abstract: The following specification describes a paint can mold in which a pair of concentric ring members and cores at diametrically opposed positions create concentric mold cavities for forming projecting bushings on the pail, each having a concentric handle bearing. The plastic for forming each bearing and a handle interconnecting the bearings passes through a gate in each ring member. Withdrawal of the ring member severs the plastic in the gate from between the bushing and bearing so that the handle is free to rotate on the bushings. Means are provided to prevent disassembly of the handle from the can.

Abstract: Slab shaped bodies are individually prepared by machining and then are assembled into mold portions which portions are adapted for incorporation into a mold for forming cube-corner type retroreflective surfaces in a body formed by such a mold. Two such slab shaped bodies in side by side relationship cooperate to provide a plurality of individual cube corner type retroreflective units extending along adjoining top side edge wall portions of such bodies. A plurality of such slab-shaped body pairs are employable to provide a region of cube corner type retroreflective units. Such slab shaped bodies make possible a variety of new and useful retroreflectors.

Abstract: Monocoque bodies for transport units are manufactured by joining together two separate parts, a main structure consisting of the bottom and side walls as the first part and the roof as the second part. Each part is produced from a plastic material by using a single two part mold.

Abstract: An apparatus for the production of plastic cages for radial roller bearings wherein the two end rings of the cage are joined by a plurality of crossbars distributed over their circumference comprising an injection-molding die with a cylindrical core corresponding to the inner diameter of the cage and an outer die element having radially moveable slides, the said injection-molding die being provided with recesses for the simultaneous production of at least two cages.

Abstract: A method and associated form assembly for forming pre-cast structural panels includes the steps of and associated apparatus for constructing an open-top disassemblable form box, reinforcing the form box with a collar assembly affixed around the form box for rigidly maintaining the shape thereof, with divider assemblies in the form box to provide a plurality of form compartments adapted to form structural panels disposed on-edge on the form box bottom panels and with insulation panels supported in the form compartments, pouring a hard-setting material into the form compartments, allowing the material to harden into structural panels, and at least partially disassembling the form box to expose a panel for removal.

Abstract: This invention relates to the making of negatives intended for the production of bodies which contain cavities of predetermined shapes.The term "negative" signifies a disposable core member, for example as used in some molding techniques such as the lost wax process. The negative at least partly matches the cavities which latter form two independent systems of regularly distributed intersecting channels with the channels in any one same system intercommunicating via ducts which are themselves regularly distributed.

Abstract: A composite baking mold comprising a plurality of individual mold spaces is made by extruding elongated portions of aluminum or other light metal and cutting off the portions at an angle to their longitudinal axes and assembling the cut componens by welding or riveting to form lengthwise and cross-width components defining the partial molds of the composite mold.

Abstract: Preformed electroforms are sliced into elongated slab shaped bodies having spaced generally parallel respective side walls so that an edge wall thereof has defined therein cube corner retroreflective units. When a plurality of such slab shaped bodies are positioned together to provide a region of cube corner type retroreflective units, there results a mold element which can be incorporated into a mold for making reflector units of transparent solid material or the like wherein angled retroreflective units and so-called standard retroreflective units are distributable over the entire face of a product reflector unit and from which air in the mold cavity can readily escape during filling in a molding operation.

Abstract: An apparatus is disclosed for forming plaques or castings of impressions of various articles. The disclosed apparatus includes a reusable impression frame and a molding frame to retain the mold composition as it hardens while in contact with the impression retaining means.

Abstract: In an automatic water struck brick molding machine including a mold for molding wet clay into bricks, releasing the suction between the wet clay in the mold and the overlying slide board by pushing the slide board across the mold for a limited distance and then forcing the slide board upwardly from said mold and immediately thereafter, raising said mold and slide board vertically far enough to leave a group of wet bricks resting on an underlying pallet ready to go to the drying area.