Abstract: A concrete column forming tube is provided for receiving poured concrete therein to produce a concrete column and which is characterized by producing surface characteristics on the concrete column including a matte finish without seam lines of the forming tube. A flexible cylindrical liner is positioned in a generally friction-fit relationship within an elongate rigid cylindrical tube constructed of partially-overlapped spirally-wound plies of paper adhered together and defining an inside wall surface having spiral seam lines thereon. The flexible liner is constructed of a paperboard layer secured at butted edges and having an inside wall surface of desired paper fiber matte texture and a thickness sufficient to bridge and cover the spiral seam lines on the inside wall surface of the rigid tube to prevent the formation of seam lines on the outside surface of the produced concrete column.

Abstract: A method for making plastic tooling by forming a surface coat over a model of the article to be made. While still in a tacky condition, the surface coat is sprinkled with sand. After the surface coat is cured and has adhered to the sprinkled sand, the surface coat is wet with a laminating resin. Then a sand and epoxy mixture is poured into the core box to form the tool. Another version of the method includes the steps of disposing a vacuum tube into the sand-epoxy core and closing off the open side of the core box through which the core mix was tamped. The surface coat is applied around the model so that the cavity in the finished core is suitable for vacuum-forming an object without forming the conventional vacuum holes.

Abstract: A method of making molds which is easy, quick and can be accomplished at room temperatures and atmospheric pressures. The method includes applying at least one layer of gel to a male mandrel and curing at least one layer of polyester impregnated fabric to the gel layer. At least one layer of epoxy impregnated fabric is cured to the polyester impregnated fabric. At least one layer of plaster impregnated is cured to the epoxy impregnated fabric. At least one layer of epoxy impregnated fabric is cured to the plaster impregnated fabric. The resulting mold is removed from the male mandrel.

Abstract: A mold assembly for casting optical lenses in which an integral lens blank-mold cup unit is created by placing liquid monomers in a cup mold which tightly adheres to polymerized lens material. A radial die is disposed upon the cup mold to contain the monomers during polymerization and to provide the polymerized material with an optical surface. A contact lens is manufactured from the integral lens blank-mold cup unit by machining off the first cup and then extraneous portions of the blank to create a finished lens.

Abstract: A plastics shaping mold comprising a layer of hardened resin material fixedly superposed on a metal mold and defining an uneven shaping surface for forming an uneven surface pattern on plastic articles. The plastics shaping mold is prepared by a method comprising the steps of superposing a resin material in a fluid state on a master in sheet form defining an uneven surface inverse to the uneven shaping surface to be formed, allowing the resin material to harden and removing the master, thereby to form the layer of hardened resin material defining the uneven shaping surface.

Abstract: A molding aperture comprising a mold piece having therein an aperture and including a surface at least partially defining a mold cavity, the mold piece being made of a first material, an ejector pin slideably housed in the aperture and made of second material substantially softer than the first material, and a mechanism for moving the ejector pin relative to the mold piece so that the ejector pin separates a molded part from the mold piece surface.

Abstract: An concrete form system includes opposed polystryrene panels stacked to form a pair of parallel, spaced-apart walls, at least one of the walls having panels which are smooth on their inward surface. Tie slots are formed in the upper and lower edges of the panels and are spaced evenly such that slots in vertically abutting panels are aligned. The panels are horiziontally staggered to strengthen vertical joints. A single tie is utilized to interlock two vertically abutting panels in each wall. A special tie design is used with the smooth-faced panels to allow the panels to be removed after a concrete wall has been formed. Another embodiment of the tie design utilizes an enlarged outer paddle with a projecting rib which allows connection of vertical walers directly to the tie.

Abstract: The present invention relates to a form for molding building components, such as columns, having a desired size, shape, and surface features from solidifying building materials such as concrete. The form is sculpted from a plastic material such as polystyrene or urethane. The cylinder is hollowed so that the interior of the resulting form has the size, shape, and surface features of the desired building component.

Abstract: A mold (1) for cast-molding a slip is provided, which comprises a divsible casting mold including a plurality of mold portions to form a mold cavity (4) when mated together; each mold portion including an air-tight housing (2), an intermediate layer (5) of coarsely porous structure adjacent to the air-tight housing (2), and a solid synthetic resin filter layer (3) of fine open-cell structure; a slip supply duct (8) being connected with said mold cavity (4) and communicated with the outside of the air-tight housing (2); a fluid-flowing duct (9) being connected with said coarse intermediate layer (5) and communicated with the outside of the air-tight housing (2); said filter layer (3) being permeably joined to the coarse intermediate layer (5), and having substantially precise shape and dimension of substantially uniform fine open-cell structure.

Abstract: A plurality of invert forming mold members are bolted together and have their ends received in internal frames provided at adjacent pipe openings in a manhole. The mold members are formed of relatively thick and heavy polyurethane and are of U-shaped cross-section. A mold supporting plate is provided in each of the internal mounting frames and has an opening configured to matingly receive the endmost mold component. The mold components are provided in a variety of linear lengths, angular curved configurations and elevation changing members so that they can be associated to form inverts required for any particular manhole configuration. The assembly of mold members is extremely strong and rigid and does not require any additional internal bracing.

Abstract: A shuttering used for forming concrete comprises a plate with a plurality of through holes opening on both its face and reverse, and a double woven fabric consisting of a face tissue which permits passage of water but prevents concrete from passing and a reverse tissue opposed to the face of the plate and relatively displaceable with respect to the face of the plate; the surplus water oozing out of placed concrete flows through gaps formed by the reverse tissue between said plate and the face tissue as well as the through holes of said plate.

Abstract: A flexible mold and method of forming a base defining either a full base or quadrant base of a dental model is provided with a perimeter member for defining the side walls of the base and a shelf extending inwardly from the rear side wall for delineating a slot at the rear of the base, which slot is usable for adhering an arm of an articulator. The configuration of the slot and/or the rear side wall of the base is striated for better adherence with the attached articulator.

Abstract: A mold for forming concrete having a bottom, a pair of side walls and a pair of end walls, all of plastic, and with the side walls and bottom being of integral one-piece construction and hinged together by living hinges defined by reduced thickness of the plastic panel. The ends walls are shaped with generally U-shaped channels dimensioned to lock onto the ends of the bottom and side walls whereby a watertight concrete mold is formed. The concrete mold is assembled by pivoting the side walls to an upright position relative to the bottom by means of the living hinges and the end walls are then secured to the bottom and side walls. The mold can be disassembled for removal of a formed concrete specimen by removal of the end walls and pivoting the side walls downwardly to a generally coplanar relation with the bottom to expose the test specimen for removal.

Abstract: A method of making precision low cost molds by applying a plurality of layers of material to a pattern. The method includes providing a pattern of the part to be formed; orienting the pattern on a surface plate in a molding dam; applying a release coating to the surfaces; applying a thin resin layer to form the mold surface; applying a layer of fiber reinforced tooling resin to the thin resin layer; applying an epoxy-dry plaster bonding layer to the tooling resin; inserting a reinforcement framework into the dam; and applying bulk casting plaster to complete the body of the mold.

Abstract: A method of making epoxy molds for making wax patterns have metal posts disposed therein which transfer compressive forces between the force applying members of the press in which the molds are located. The metal cylinders in the upper mold section have right hand screw threaded axial bores and the metal cylinders in the lower mold section have left hand screw threaded axial bores. The metal cylinders are connected together when the mold sections are poured by connecting studs which have oppositely threaded ends. After the epoxy cures, screw drivers are inserted into the threaded bores from outside the molds and the connecting studs are turned in a direction which causes the mold sections to separate in turnbuckle fashion. Accurate alignment of the inner end faces of the cylinders in the parting surfaces of the mold sections is achieved by having the metal posts connected during the mold pouring steps.

Abstract: A method of making a mold used in a pressure slip casting process, including the steps of: preparing at least two porous bodies each defining a filter layer having a plurality of channels formed therein for allowing water and air to flow therethrough; placing a reinforcing iron frame and one of the porous bodies on a bottom board with a parting agent applied to its surface; applying a sealing resin to the surface of the other porous body opposite to a molding surface thereof and to a portion of the surface of the bottom board between the box and the porous body; filling up the space between one of the porous bodies and the reinforcing iron frame with a filler; and preparing a second part of the pressure mold.

Abstract: There is provided a mold fabricated from thermoplastic material incorporatinog a thin flexible, substantially knife-edged rim projecting from the periphery of the mold cavity on both the male and female portions thereof, and having a reservoir to contain additional monomer, such reservoir being separated from the mold cavity by the conjunction or mating line of the peripheral rim projections.Such molds are useful for the molding of optical implants which do not require further machining or similar treatment.

Abstract: A unitary mold for making ice sculpture includes: a mold made of elastomer material having an inner cavity concave downwardly for forming a model of an ice sculpture such as an animal, a building or a person or an article; a perforating bar or needle poking through the mold which can be warmed up to slightly melt the ice surrounding the bar or needle for its easy withdrawal from the ice product and forming a through hole of the ice sculpture for decorative, carrying, or water-drainage purposes; and an expansion-releasing element such as a flip-flop member formed as a part of the mold, serving as a buffer for the expansion of the water during its refrigeration process.

Abstract: A flexible surface plywood concrete form liner is disclosed which includes a flat planar sheet of relatively thick plywood material which has been precisely sized and squared. The prepared plywood sheet material is coated with a layer of relatively thin, flexible elastomeric material cast as a one-piece layer over the entire surface of one side of the plywood sheet material as well as all four edges. In this way, the elastomeric material is a continuous integral coating bonded directly to the surfaces of the plywood to prevent the penetration of moisture or chemicals from the concrete into the laminations of the plywood during use. A textured negative impression can be provided on the outer surface of the elastomeric material to leave a textured surface in the finished concrete. A novel edge seal which can be slightly angled is formed along the edges of the liner so that the joint between the liners is reinforced to strengthen and prevent blow-out of the concrete at the liner joints.

Abstract: A mold for molding an optical disc includes a first mold member having a recess, and a second mold having a body and a plate-like sintered ceramic member secured to the body and having a flat seat surface. The recess and the flat seat surface jointly provides a mold cavity when the first and second mold members are mated together. A disc-shaped thin stamper is adapted to be seated on and detachably secured to the flat seat surface. The ceramic member is made of a ceramic material having Rockwell hardness (A-Scale) of not less than 90, so that the flat seat surface is not subjected to undue damage for a prolonged period of time.

Abstract: A mold capable of imparting uniform transparency to the calcium phosphate type crystallized glass, in which crystals of calcium metaphosphate are present at the shaping surface of the mold which comes into contact with the material to be shaped.

Abstract: A concrete forming device made from plastic components which can be assembled in the location of use to form a desired shape and fastened to the ground with steel stakes driven through brackets attached to components. After use, the stakes are removed and the components disassembled for use elsewhere. Desirably, the components are formed from fiberglass reinforced resins and additives of a type which impart a surface to the components of such a nature as to have little tendency to adhere to the concrete. This makes it easy to remove the components and to reuse them without cleaning. The components are constructed with suitable adaptors and couplers so that assembly can be accomplished by merely inserting male parts into female parts in a slip fit relationship. Both straight and curved shapes can be formed, as well as shapes that have both straight and curved elements.

Abstract: For eliminating burrs which form on moulded, or injected products, a moulding device and, in particular, a tire-vulcanizing mould, is provided with a plastically and elastically deformable portion on the coupling surface between the corresponding elements. The coupling, between the facing surfaces, is not simultaneous, but involves a portion of surface having an amplitude that increases in its size, during the shutting movement of the mould.

Abstract: A lightweight, concrete form having an inner elongate cylindrical member with an internal opening having a cross section to provide the desired shape for a concrete column and a layer of thin stretch film stretched about the inner member to place the inner member in compression and with the ends of the film overlapped for self-adherence.

Abstract: A soft contact lens made of a hydrated polymer with an overall water content in the range of 40% to 90% by weight has a water content at the front surface of the lens which is at least 3 percentage points higher than the water content at its rear cornea-contacting surface, as measured by use of an Abbe refractometer. The lens is made from a monomer capable of polymerizing to form a clear transparent partially swollen hydrogel polymer and a diluent forming from 15 to 50% by weight of the moulding mixture, which is moulded between a convex and a concave mould member of different materials chosen so that the lens has the different water contents at its surfaces, as mentioned above.

Abstract: A material resistant to high temperature melts of metal and salt which comprises a composite material containing silicon nitride, silicon oxynitride, silicon dioxide and silicon prepared by(a) suspending silicon powder in SiO.sub.2 sol to form a pourable mass,(b) molding a workpiece from said mass,(c) hardening the molded workpiece, and(d) nitriding the hardened workpiece in a nitrogen atmosphere to form silicon nitride and silicon oxynitride to a degree that SiO.sub.2 and elemental silicon remain detectable in the nitrided workpiece,is useful as the material of construction for crucibles and tools for confining, handling and treating melts of metals or salts.

Abstract: An improved procedure for manufacture of optical replication products comprising the use of a thin amorphous coating of carbon as a protective coating which also facilitates release during replication, between master and replication members. Particular attention is given to controlling the compressive forces of the carbon layer to provide good mechanical coatings on suitable optical surfaces. Thereafter, the replicated members may themselves be coated with the carbon as a protective coating only or for further use as a release-promoting "submasters".

Abstract: A casting mold for manufacturing grid plates for lead batteries makes use of easily interchangeable mold inserts for each half of a two-part, external metallic mold holder. The mold inserts are made of a highly porous microfiber nonwoven material, and render unnecessary the conventional cork-flour coating of casting molds due to good thermal insulating properties, high permeability to air and non-wettability by lead. The casting mold inserts are manufactured in a process which involves fixing of the nonwoven material with a curable binder either during or after shaping of the negative for the grid plate, so that the resulting parts assume a cardboard-like consistency.

Abstract: The molding apparatus for molding compact discs defines an openable mold cavity and the information bearing disc which forms the impression on the compact disc in held in place by vacuum in the mold cavity in order to allow ready and easy removal and replacement of the insert when necessary.

Abstract: A mold for press-molding glass elements comprising a base member made of a super hard alloy or a cermet; at least one intermediate layer made of a nitride, a carbide, an oxide or a metal, provided on the base member; and a noble metal layer provided on the intermediate layer for forming a mold surface. An active metal contained in the base member is prevented from diffusing to the mold surface by the presence of the intermediate layer.

Abstract: The invention is directed to an adjustable mold for use in fabricating bigradable polymeric bone replacements or implants. The invention consists of a box-like structure with two movable plates therein which can be locked into place permitting different size replacements to be fabricated. The interior walls are panels consisting of polytetrafluoroethylene which permit easy removal of a cured bone replacement. The construction and locking means for the movable plates permit the invention to withstand the pressures developed in replacement fabrication as well as to withstand the most commonly used types of sterilization procedures.

Abstract: An elongated flexible form is disclosed. The elongated flexible form may be shaped to fit the contour of a concrete structure of variable shape and is held in position by a plurality of positioning brackets. The flexible form is made out of a flexible material such as natural or synthetic rubber and may be reinforced by metal strips, cable mesh, metal mesh, nylon mesh or a combination of the same. Each of the positioning brackets has a hollow body portion which is molded to a flexible form or welded to a metal plate which is molded to the flexible form. A stake and wedge combination are used to hold each bracket in place. Connecting flanges may be used to attach the end of the flexible form to another flexible form or to a metal form. The connecting flanges are molded or welded to a metal plate which are molded to the end of each form and are held together by a fastening device. The flexible form has a plurality of ribs therealong said form to provide strength and to reduce the required thickness thereof.

Abstract: A method of moulding composite materials in which prepregs of resin impregnated filaments are interposed between a shaped partially contained polytetrafluoroethylene body and a die. The assembly is heated to cause the polytetrafluoroethylene body to thermally expand and compress the prepregs against the die so that the prepregs are moulded to the shape of the die and the resin in the prepregs cures.

Abstract: A mold having a concrete base and a mold cavity member lined with sheet metal. Adjacent the sheet metal are electric heating means and between the electric heating means and the concrete base is a light-weight concrete insulating layer.

Abstract: A plastic mold assembly comprising a male and female section for casting soft contact lenses from a polymerizable feed material wherein compensation for polymerization shrinkage is attained and disengagement of the male and female mold sections is facilitated by providing one flexible and one rigid mold section. Good optical properties of the mold surfaces are obtained by forming the mold sections entirely from a thermoplastic material such as polystyrene that will not crystallize when cooled from a melt. In one embodiment a plurality of flexible male sections having convex molding surfaces and a plurality of rigid female sections having concave molding surfaces are supported on frames to attain an increased production rate of finished soft contact lenses.

Abstract: The disclosure is directed to a device for forming a post-receiving cavity in a solid material during the solidification thereof with the device including a clamping element having first and second side walls disposed in facing relationship to each other, with each of the side walls having a vertical extent, and a resilient wall which extends between the first and second side walls and interconnects the first and second side walls intermediate the respective vertical extent of each side wall to thereby divide each side wall into an upper end portion and a lower basal portion. The resilient wall is constructed and configured to cause the upper end portions of the side walls to move outwardly in response to application of an inward lateral force to the lower basal portions of the side walls and also to cause the upper end portions of the side walls to be maintained at a predetermined distance from each other in the absence of any inward lateral force being applied to the lower basal portions.

Abstract: Disclosed is a molding method for producing an optical glass element which comprises the steps of preparing a mold coated with a thin film of a noble metal alloy, and molding optical glass into the form of an optical glass element by using the mold while applying heat and pressure to the optical glass. Further disclosed is such a mold that is coated with a thin film of a noble metal alloy, for producing an optical glass element.

Abstract: A portable ice maker and container capable of utilizing available freezer space to provide additional ice-making capacity is disclosed. In one embodiment, the device includes a bucket-shaped vessel having a plurality of coiled strips arranged in a vertical stack with adjacent strips separated by a partition member, each coiled strip being in a horizontal position with the curvature of the coils arranged so as to be generally concentric with the central vertical axis of the vessel. A plurality of transverse ribs are attached at intervals along the length of each strip for use in defining the shape of the individual ice cubes.

Abstract: An improved mold, apparatus and method for injection molding is provided. The apparatus is of the type which includes a means for opening and closing a multi-part injection molding mold, means for supplying molten material under high pressure into the mold cavity when the mold is closed and means for removing articles molded in the cavity on cooling. The improvement is provided by a new multi-part mold which is made up of at least two parts. Each part of the mold comprises a mold block portion having a ceramic mold cavity insert. The ceramic mold cavity inserts define the walls of the mold cavity when the mold is closed. Each mold cavity insert comprises a shaped ceramic body having a mounting surface adapted to fit under compressive stress throughout the entire molding operation within a mounting cavity of the mold block portion.

Abstract: A mold used for manufacturing optical glass parts by the direct press molding of lumps of raw optical glass. The pressing surface of the mold is made of a material comprising .alpha. type SiC or amorphous SiC or a mixture of both. The pressing surface may be a coated film on a base body of hard alloy or high density carbon.

Abstract: A slip casting mold consisting essentially of a gypsum mold, which contains a water-insoluble organic material, more particularly, a water-insoluble vegetable material such as cellulose, or which further contains glue in addition to the water-insoluble organic material. Since the strength of the casting mold is reduced markedly by heating, a cast article requiring a core (or master mold) having complex shape can be obtained extremely easily.

Abstract: The present invention relates to a disposable concrete forming apparatus. The apparatus includes an elongate, tubular and rigid form having at least one inner wall surface defining an enclosure in which concrete can be poured and allowed to harden. The apparatus further includes a flexible liner of predetermined thickness which lines the inner surface to preclude formation of form lines on the hardened concrete that correspond to markings on the inner wall surface of the rigid form. The flexible liner has at least one outside wall surface for each inner wall surface and is movable between a compressed position permitting insertion of the liner into the enclosure and a normal expanded position with the outside wall surface pressing against the inner wall surface of the rigid form. As a result, no gap is present between the inner wall surface and the outer wall surface.

Abstract: Liquid curable resins, such as unsaturated polyester resins, unsaturated epoxy resins, polymethyl methacrylates, are cured in a mold, the casting surface of which, is made of a vinyl alcohol-olefin copolymer to produce a shaped resinous article with an improved and even surface gloss.

Abstract: The invention relates to a mold for producing a T-shaped hose composed of a main hose having a sidewall with an opening and a secondary hose joined at one end to the sidewall opening of the main hose to form a "T". The mold includes a main mandrel for the main hose having a disk-shaped recess on which the main hose is mountable with its opening in registry with the mandrel recess and a secondary mandrel for the secondary hose having a cylindrical recess adjacent to one end thereof. The secondary mandrel is disengageably secured at the one end thereof to the main mandrel adjacent to the recess thereof, so that the mandrels are arranged in the form of a "T" and cooperate with one another to define an interior mold cavity at the zone of connection. The mold further includes an outer mold part that is mountable on the main hose and the secondary hose after each has been mounted on its respective mandrel parts.

Abstract: A coating and method of depositing it is provided. The wear resistant coating comprises a thin layer of disordered boron and carbon applied to a substrate. The coating has good adherence and provides good resistance to wear so that it is useful as a tool coating. In a more specific embodiment, the coating is disordered boron carbide. The coating can have a high gloss and can also be used as a decorative coating.The coating can be made by sputtering boron and carbon onto a substrate. A bias voltage may be applied to the substrate during sputtering.In accordance with one embodiment, the disordered boron and carbon coating is of a composition B.sub.x C.sub.1-x where x is from about 0.60 to about 0.90.In accordance with another embodiment, an improved molding tool is provided that includes a disordered carbon coating on at least a portion of the working surface of the molding tool.

Abstract: An elongated flexible form is presented. The elongated flexible form may be shaped to fit the contour of a concrete structure of variable shape and is held in position by a plurality of positioning brackets. The flexible form is made out of a flexible material such as natural or synthetic rubber and may be reinforced by wire, cables, steel belts, nylon cord, ply material or a combination of the same. Each of the positioning brackets has a hollow body portion which is bolted to the flexible form. A stake and wedge are used to hold each bracket in place. Connecting flanges may be used to attach the end of the flexible form to another flexible form or to a metal form. The connecting flanges are bolted to the end of each form and are held together by a fastening device. Another embodiment of the positioning brackets may be bolted to the end of the flexible form and also used for the purpose of attaching the end of the flexible form to another form.

Abstract: A semi-rigid pool coping form board of the type which is temporarily adhered on the generally vertical surface of a pool mouth-bounding structure to project a uniform height above the generally horizontal upper surface of that bounding structure is provided where its basal feet adjoin its coping inner edge-molding concave surface with an integral bead. At regular intervals, the bead is replaced by a spring clip with a similarly shaped nose. Each spring clip is rooted in the foam board to a standard depth with the aid of a stop shoulder and an adhesive. By locating in, snapping into and filling the liner track channel mouth the bead/spring clip structure automatically locates the form boards heightwise in relation to the pool mouth-bounding structure, provides an easy to use and effective secondary securement system for the form boards and keeps the pool liner track channel so free of cement that any clean-up needed is minor.

Abstract: A plastic mold assembly comprising a male and female section for casting soft contact lenses from a polymerizable feed material wherein compensation for polymerization shrinkage is attained and disengagement of the male and female mold sections is facilitated by providing one flexible and one rigid mold section. Good optical properties of the mold surfaces are obtained by forming the mold sections entirely from a thermoplastic material such as polystyrene that will not crystallize when cooled from a melt. In one embodiment a plurality of flexible male sections having convex molding surfaces and a plurality of rigid female sections having concave molding surfaces are supported on frames to attain an increased production rate of finished soft contact lenses.

Abstract: A carbonaceous article, e.g., a carbon or graphite crucible or mold, is provided with an oxidation prohibitive coating comprising a rigid, glassy, ceramic, refractory material containing mullite and silicon carbide or boron carbide or both. The carbonaceous article has a coefficient of thermal expansion which is greater than about 1.5.times.10.sup.-6 inch/inch/.degree.C.

Abstract: A method and apparatus for casting of fragile complex shapes by the formation of a two layer wax mold about a pattern of the shape to be cast. Thereafter, the pattern is removed from the mold and the outer layer of wax dissolved. The slip is then poured into the mold and allowed to solidify before the inner layer of the mold is completely removed from the cast article.