Abstract: Apparatus for forming inverts in a manhole base using a single pour or double pour technique. In the single pour technique, the invert is formed simultaneously with the formation of the manhole base using a mold member having a channel-shaped projection defining the invert. Alignment members simply, and precisely, align the mold member having the channel-shaped projection with the members forming the base member sidewall openings to form a manhole base having an invert in precise alignment with associated sidewall openings. In the two pour technique, the manhole base is initially formed. Thereafter, channel invert forms are aligned with sidewall openings by alignment members arranged within the manhole openings to assure precise alignment therebetween, wherein the invert formed within the manhole base by pouring the casting material into the base member forms an invert which is in precise alignment with associated sidewall openings.

Abstract: An adjustable molding apparatus for injection molding interfacing plastic components wherein the mold includes three sliding blocks of which the outermost blocks are concurrently moved relative to the middle block which is shiftable between various positions relative to the outermost blocks so as to alternatively form two molding cavities for receiving plastic materials so that the materials may be molded in intimate facing relationship with one another.

Abstract: The metal form has a flexible panel member with a perimetral flange projected laterally from one side thereof. Each of a pair of transversely opposite side sections of the flange is segmented by a plurality of longitudinally spaced V-shaped notches having their apices adjacent the one side of the panel member to provide for a lateral flexing movement of the panel member to a preselected shape. With the panel member in the predetermined shape, the segments in each of the flange side sections are connected together against relative movement to retain the predetermined shape of the panel member.

Abstract: A device for damping vibrations of an overhead conductor comprises a die cast weight and housing comprised of opposed weight and housing halves located on opposed sides of a clamp arm and having spherical outer surfaces to minimize corona and tooling costs. The clamp arm is located between two tubular elastomer damping elements secured in place between the clamp arm and the weight and housing halves. The damping device, in addition, includes a pin that secures the weight and housing halves, clamp arm, and damping members together in a sandwich-like construction.

Abstract: A one-time-use form for concrete footings comprises a hollow plastic molding with a step-tapered upper portion, sections of which are removable to receive different sizes or shapes of one-time-use pier forms. Use of the two forms in concert permits substantial economy in foundation work because only one excavation, backfill and concrete pouring is required to construct both footings and piers.

Abstract: A mold for forming an elliptical elastic ring is provided and consists of a pair of plates, each having a mating cavity to form an elastic ring with same circumferential length as a circle of given diameter whereby the mold can be reduced in size in one direction for economic advantages.

Abstract: A casting apparatus for receiving electrophoretic gel trays is disclosed. The casting apparatus includes a pair of spaced apart seal elements which are movable with respect to one another to provide one or, more openings of varying size to receive a corresponding gel tray therein. The open ends of the gel tray are sealed by the seal elements so that hot argrose or polyacrylamide gel may be poured into the gel tray for forming a gel layer of predetermined thickness. The seal elements are maintained in sealing engagement with the open ends of the gel trays by means of a rod frictionally engaged between a portion of the housing forming the casting apparatus and one of the seal elements.

Abstract: A mold for preparing a plug suitable for making a dental shade sample having a layer of porcelain material having a known thickness; the mold comprises: a base with a cylinder extending upwardly therefrom; a planar platform surface at the upper end of the cylinder, the cylinder being threaded in a region below the platform surface; and a hollow annular housing defining an internal cylindrical surface sized and cooperatively threaded to engage the cylinder threads. Rotation of the housing relative to the cylinder moves the housing vertically and continuously varies the known depth of the cavity between the housing and the platform surface. By proper positioning of the housing and cylinder a known desired cavity depth is obtained and filled with porcelain-forming material to mold a first shade layer. The housing is rotated to increase the cavity depth by known desired increments for subsequent layers.

Abstract: A battery type mold assembly in which simple upwardly extending mold members having relief patterns on their major mold surfaces are pivotally mounted on a frame at the lower ends so as to be movable between a closed position in which a mold cavity is formed and an open position in which there is provided for the removal of a molded article therefrom. The assembly is characterized by the presence of carrier members which are, at least initially, adjustable relative to each other and the carrier members are pivotally connected to the mold members.

Abstract: The invention relates to a matrix mold, in which at least one mold cavity is bounded by the head of an ejector at the lower opening of a cup, from which in the substantially truncated conical wall of this cup, widening upward, facing the interior, by at least two grooves in the lower part of the cup and by teeth disposed in the interior of these groove, which are radially slidable in a radial direction by an eccentric arrangement, and in which the diameter of the head is greater than the smallest diameter of the mold cavity.

Abstract: An injection mold with a female mold portion and a male mold portion has a locking ring which closely surrounds one mold portion and has a beveled inner centering surface coacting in a mold-closed position with a complementarily beveled outer centering surface of the other mold portion for properly aligning the two mold portions with each other. The locking ring and the mold portion surrounded thereby form an assembly mounted on a backing plate by means of bolts screwed into that assembly, the bolts having heads bearing upon spacing sleeves which abut the assembly and are received with some clearance in a bore of the backing plate. The sleeves project from the bores of the backing plate to provide room for one or more Belleville springs acting upon the bolt heads to keep the sleeves under pressure.

Abstract: Apparatus is provided for fabricating ophthalmic lenses of the single vision and bifocal type comprising a holder having a base portion for support thereof. An outer circumferential side wall extends upwardly from the base portion and terminates in an upper surface which is disposed in substantially parallel relationship of the bottom surface of the holder base portion. The side walls comprise a plurality of equally spaced support posts. The support posts are provided with a lower step and an upper step with the upper step being disposed radially outwardly of said lower step. The lower steps define a parallel support surface upon which there is disposed a lower mold. The upper steps define a parallel support surface upon which is disposed an upper mold. The upper and lower support surfaces being disposed in substantially parallel relationship.

Abstract: A mold for synthetic resin products which are to be shaped while soft, includes a pair of elongated mold parts each having opposed complementary faces with contours at least partially conforming to at least parts of the product to be shaped. A support means on which the mold parts are mounted provide for moving at least one of the mold parts relative to the other mold part to effect removal therefrom of a finished product. The mold parts are constructed and arranged so as to be bendable along their longitudinal axes to effect a change in arcuate configuration, the mold parts being made of a material which facilitates sliding of the synthetic resin product through the mold, the support means supporting the mold parts in fixed spaced apart disposition as the product is moved longitudinally between the mold parts to thereby impart to the product an arcuate configuration corresponding to the arcuate configuration of the mold parts.

Abstract: A multi-purpose baking pan is formed from a bottom pan member having a convex bottom surface and a pair of side members having a number of pairs of spaced apart holes. First and second end pieces are adapted to mate with respective pairs of holes in the side members of the bottom pan portion to form a baking pan of predetermined size. Different sized baking pans may be formed with the same structure by moving one or both of said end pieces to different pairs of holes along the bottom pan portion. A cupcake holder or similar plate having a number of holes therein may be mounted within the baking pan. The bottom portion of the pan member has a convex shape to mate with the end pieces and form a batter tight fit.

Abstract: An apparatus for automatically adjusting the level of at least one surface point on a flexible platen of a photogrammetry apparatus having photogrammetric images projected thereon in first and second colors is disclosed as comprising means for receiving and transmitting the first and second colored images at the surface point, which is attached to and movable with the receiving and transmitting means and means for vertically positioning the receiving and transmitting means. There is also provided means for converting the transmitted colored images into electrical signals, which are proportional in strength to the intensity of the colored images, and means for controlling the positioning means in response to the electrical signals, whereby the surface point is adjusted to a position where the colored images intersect.

Abstract: Truncated contact lenses are produced in a direct casting operation using a mold assembly of a male mold member and a female mold member, both of which have molding surfaces and only one of which is provided with an inwardly flexible continuous rim portion. When vulcanizable or polymerizable constituents are placed in the mold, the two mold members are brought together, the flexible rim is flexed inwardly and the finished lens of the desired shape is obtained. The flexible rim is composed of a circular portion having two ends and a straight line connecting the two ends. This defines a chord and provides the finished lens with the truncation desired.Preferably the lens also has a toric surface and prism ballast to assist in positional stability of the lens on the eye of the wearer.

Abstract: A mold half is provided particularly for laminated parts which are to be ded from fiber components, with the mold half being formed with an inside surface matching the negative contour of the part to be molded therein. The mold half is formed of a shaped plate material which has been plastically deformed along deformation lines at angles determined by the shape of the part to be molded. The mold half is affixed upon a support member which fits the shape of the deformed material.

Abstract: A method and apparatus for forming a structure having an inner surface in the form of at least one segment of a sphere. An inner support is mounted at a fixed point from which a radius can be struck to define the inner surface of the structure. An elongated radial member is pivotally connected at one end to the inner support with its other end being movable vertically and horizontally. A forming member at the other end of the elongated member has an outer surface in the shape of the inner surface of the segment to be formed. An actuator moves the elongated member horizontally and vertically to selected positions to place the outer surface of the forming member opposite and adjacent the inner surface of each segment being formed. A forming material is applied to the outer surface of the forming member while it is opposite and adjacent the inner surface of the segment being formed to form each segment directly on the forming member.

Abstract: An assembly is provided for molding plastic decorations. The assembly includes a support plate for the mold frame and holding fixtures which are positionable to provide a snap-in and snap-out holding relation with the mold frame. The assembly is adapted for use in manufacturing perfume-release plastic decorations which resemble stained glass miniatures.

Abstract: A mold for embedding a tubular member within a casing wherein the mold compensates for variations in length of the tubular member. The mold is a two-member structure wherein one of the members is provided with a cavity for receiving the tubular member and the casing. The cavity is closed at one end by a movable ring insert which moves relative to the assembled relationship of the tubular member within the casing to compensate for any length variations.

Abstract: A mold for blow molding synthetic plastic bottles and jugs wherein a depression is formed in the side of the container for volume regulating purposes. The mold incorporates an insert member within its side wall and cavity which is adjustably positionable with respect to its degree of extension into the mold cavity resulting in formation of a variable volume depression in the container wall. The mold inserts may take various forms and include means for locking the insert adjustment.

Abstract: Cast multifocal lenses are produced from ledged casting pieces molded from a master die having a molding surface made up of juxtapositioned die components each precision surfaced to a curvature and finish corresponding to a multifocal surface desired to be cast upon a lens and relatively prearranged according to desired height and position of cast lens ledging.

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 mold is described including at least one flexible mold member fabricated from thermoplastic polymeric materials. Desirably, the flexible mold member is placed within a circular torque ring and pressure is applied to flex the mold member into a selected toric configuration, a polymerizable mixture is inserted, the mold closed and the mixture is hardened into the desired lens. Lenses so produced, which may be either flexible or rigid, have at least one surface which is toric in configuration.

Abstract: A method for producing precast manhole bases utilizing an apparatus consisting of a mold jacket defining vertical walls and a mold form disposed within the jacket. The form includes a central portion spaced inwardly from the jacket and channel forming members extending over the central portion with inserts attached to the channel forming members and extending into contact with the jacket walls. When concrete is poured over the mold form and allowed to solidify, the bottom wall of the base forms over the central portion with the channel forming members defining the channels in the bottom wall of the base. The channel forming members consist of a first member attachable in a fixed position on the central portion, this first channel forming member being shaped for defining an effluent channel and a central basin in the mold base. One or more additional channel forming members extend radially from the basin, and these include locking means for fixing the members in any desired position relative to the basin.

Abstract: A reusable mold for shaping moldable material comprising a flexible freestanding wall capable of being formed in any desired shape to form the contour of the material to be molded, and a method for assembling and using the mold. The mold may include several interconnecting sections and means to hold the mold tightly against a base section to prevent leakage of the moldable material. Preprinted designs may be provided for shaping the mold to follow a desired design outline.

Abstract: A modular die system is disclosed for use in blow molding an extruded plastic parison to form container members of essentially similar design but differeing dimensionally. Through use of composite die sets having modular elements, containers of different capacities can be molded without requiring complete die sets for each individual container size. That is, die elements used in molding a container member of one size may also serve in molding container members of a different size. This capability is achieved through break-down of the usual integral, cavity-defining die halves of a split die set into a plurality of die elements so selected that each of them controls but two of the three dimensions of the die cavity. Provision is made for substituting different die elements in the composite die sets and for securing these together on the platens of a blow molding press.

Abstract: A method and apparatus for a universal winding arbor including an arbor core adapted for use with a plurality of differently sized arbor blocks in winding transformers of different sizes. Each differently sized arbor block may be formed in a unique mold which includes a vertically adjustable side and horizontally adjustable side to vary the thickness and width respectively. The arbor core is centered within the mold and a liquid resin is allowed to cure in the mold to form the winding arbor.

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: A method of and apparatus for the manufacture of dynamically balanced molded plastic air movement devices wherein material may be readily added or deleted from inactive surface portions of the air movement devices during manufacture by adjustable pins accessable from the front or face of a mold half.

Abstract: A wall is constructed from a continuous flexible strip or bar that is progressively wound upon itself and releasably interlocked under pressure to form a continuous wall around an enclosed space. The pressure locked strip may be formed of plastic or other suitable material and an apparatus is provided for pressure locking the strip together to form a peripheral wall with the peripheral wall being capable of use as one wall of a mold or form that coacts with a similar or other wall spaced therefrom to receive a hardenable and settable material therebetween. The two walls may be progressively stripped from the bottom of the hardenable material which has hardened sufficiently to be self-sustaining, and reapplied to the top of the walls as new material is placed therebetween enabling a continuous wall forming process to be used.

Abstract: A forming device for prefabricating structures having a size-adjustable core surrounded by a shell structure displaceable with respect to the core. The shell structure is constructed of a plurality of frame members each independently adjustable with respect to the core. One or more tensioning cables surround the core, the cables being reeved through a series of fixed and movable pulleys mounted at each corner of the shell formed by the intersecting frame members. By operating the cables the frame members are adjustable with respect to the position of the core of the forming device.

Abstract: Apparatus for finish casting of bifocal ophthalmic lenses from plastic material is described. No further surface grinding or polishing of the lens is required. The portion of the bifocal segment of the lens may be adjusted to any desired location relative to the optical center of the distance field of the lens. The apparatus comprises a power mold having a predetermined spherical or sphero-cylindrical surface, a bifocal mold having a predetermined optical curvature with a bifocal segment having a different optical curvature countersunk in the face thereof, and an annular gasket coupling the power and bifocal molds. The bifocal segment is adjusted relative to the optical center of the cast lens by use of a wedge member. An illustrative calculation to determine placement and thickness of the wedge for a given ophthalmic prescription is set forth.