Abstract: According to a tub for a washing machine according to an exemplary embodiment of the present disclosure, a bottom portion, an outer side wall portion, an inner side wall portion, a water flow passage side wall are integrally formed by injection molding so as to form a water flow passage. An apparatus and a method of manufacturing the tub for a washing machine according to the exemplary embodiment of the present disclosure allow the bottom portion, the outer side wall portion, the inner side wall portion, and the water flow passage side wall to be integrally formed by injection molding.

Abstract: A segmented core (1) for molding of an impeller (12), especially a pump impeller, includes at least three segments (2). All of the segments (2) have the same form and each segment (2) has connecting devices (3, 3?) for connecting the segment (2) with the adjacent segments (2). A method for molding an impeller (12) includes the steps of: providing a molding tool (14), providing a core (1) including at least three identical segments (2), which include the connection portions (3, 3?) for connecting the segment (2) with the adjacent segments (2); assembling of the core (1); placing the core (1) in the molding tool (14); molding the impeller (12), ejecting the core (1) and the impeller (12) out of the molding tool (14); and removing the core (1) from the impeller (12).

Abstract: An arthroscopic or other surgical cutter has features which facilitate fabrication by ceramic molding. The arthroscopic cutter includes a cutter body having a longitudinal axis and a window, an interior channel, and a plurality of cutting edges extending radially outwardly from an outer surface thereof. The features include non-helical, longitudinally aligned cutting edges, controlled thicknesses of the cutting edges, controlled heights of the cutting edges, controlled areas of the windows, controlled diameters of the internal channels, controlled rake angles of the cutting edges, and other parameters.

Abstract: A muzzle brake for reducing the recoil associated with firing a weapon comprising a plurality of gas vents, a plurality of projections extending outward from the muzzle brake, and an interiorly depressed annular nose surrounding the projectile's exit point, for capturing, redirecting, and/or creating turbulence in propellant gases generated from firing the weapon.

Abstract: Exemplary embodiments are directed to a mold for producing hollow-cylinder-type molded parts, having an external mold portion, that determines an inner cavity of a molded part to be manufactured. The external mold portion has a first cylindrical mold, which extends in a rotationally symmetrical manner about a first axis, and a hemispherical mold having a diameter equal to a diameter of the first cylindrical mold directly adjoins one of the two ends of the cylindrical mold along the first axis, wherein a second cylindrical mold adjoins the hemispherical mold in radial alignment. The hemispherical mold has a spherical cap, the second cylindrical mold is rotatable together with the spherical cap about a second axis which is arranged at an angle with respect to the first axis, and the second cylindrical mold is arranged concentrically with respect to the second rotational axis.

Abstract: A mold for use in forming form a porous molded product via an injection molding process is provided. The method comprises injecting a material into the mold comprising multiple layers of shaping elements extending through a cavity, each layer of shaping elements including multiple shaping elements; and removing the molded product from the mold, the molded product having a porous structure formed by at least some of the shaping elements of the layers of shaping elements. The porous structure includes a multiplicity of ordered structural members defining the porous structure, the multiplicity of structural members intersecting to form structural member intersections, and a multiplicity of the pores defined by the multiplicity of structural members.

Abstract: In order to save material and/or for an easy assembly in a mould bottom of a bottom mould, a moulded piece forming a negative mould of at least a part of a chute of a shaft bottom which moulded piece is formed from a material forming a dead core and, optionally being assembled with at least one further moulded piece, forms the negative mould of a chute of a shaft bottom in the form of a moulded body, wherein the moulded piece(s) is (are) designed for being placed onto a mould bottom of a bottom mould for a shaft bottom and has (have) linear and/or an arcuate longitudinal extension, is characterized in that the moulded piece has at least one hollow space open toward the base which can be placed onto the mould bottom of the bottom mould and is designed as basically closed on the end faces lying opposite each other in the longitudinal extension of the moulded piece.

Abstract: A system for forming thin-wall pre-cast concrete forms and structures, using vertical casting and slip-form techniques to partition wet concrete into separate thin-wall sections, the system being particularly useful for fabricating pre-cast concrete column forms having a composition and vertical consistency substantially the same as the integral poured concrete core of the finished concrete column.

Abstract: An injection molding manufacturing apparatus and method that facilitates the formation of a blind hole in a two-component assembly in which a first component is molded in-situ in a second component. A first cylindrically-shaped component having a transverse socket with a blind hole is injected molding and then transferred into and molded in-situ within the second component in such a way that the blind hole is blocked-off by a second central core pin during molding of the second component. In this manner, the two-component in-situ assembly includes a blind hole formed in a socket.

Abstract: An integral three-dimensional article having interstitials therethrough, the three-dimensional article comprises an unconstrained number of axially successive stages. An apparatus and process for molding such a three-dimensional article are also disclosed. The apparatus has members extending into a mold cavity, each member having access to the periphery of the mold cavity. Each stage may nest within an adjacent stage. The nesting may be accomplished by having the end of one stage be convex, while the mating end of an adjacent stage is complementary and concave. The article may be useful as a static mixer, heat exchanger, etc.

Abstract: A method of injection molding a part having two undercut regions using a two-part mold. A combined pin-in-a-sleeve extends into the cavity in each of the mold parts in order to form a bore in a part to be molded in that cavity. Each pin provides a portion shaped to form an undercut region in the bore. The pins abut each other. After an injection molded part is made, the mold opens a limited and discrete distance to allow the molded part to be released from the hold of the mold cavity. Then, the mold opens fully for the continuation of a multi-step operation to pull the pins out of the undercut regions.

Abstract: Methods and devices for manufacturing a conduit for placing a target vessel in fluid communication with a source of blood, such as a heart chamber containing blood. The conduit includes first and second portion adapted to be placed in fluid communication with a heart chamber and a target vessel. The conduit lies on the exterior of the myocardium between the blood source and the target vessel and delivers blood in multiple directions within the lumen of the target vessel. The conduit, which may be formed of any suitable synthetic vascular graft material, is generally T-shaped with the leg having two free ends disposed in the target vessel, preferably being secured thereto via a suture-free attachment. The conduit comprises vascular graft material and may be manufactured various ways, such as molding a conduit from any suitable biocompatible material or fabricating a conduit from one or more pieces of vascular graft material.

Abstract: An improved molded plastic elbow and a related mold assembly and manufacturing method are provided, wherein the elbow defines an internal flow path having a smoothly radiused inside turn. The elbow is formed by injecting plastic material into a tubular mold cavity formed by closed mold members in cooperation with a pair of slidably retractable core units of circular cross section and having distal ends in mating, angularly set end-to-end contact to form the internal flow path having a turn formed along the length thereof. Each core unit comprises an outer core pin to form an outer portion of the flow path and including a ramped track for slide-fit mounting of an inner slide segment which forms an inner portion of the flow path and further includes a curved inside edge to form a portion of the smoothly radiused inside turn.

Abstract: A method and apparatus for producing molded fluoropolymer sweep elbows with straight threadable ends that minimizes distortion of the fitting. The apparatus comprises a mold core or insert that is comprised of multiple curved segments which are retracted from the mold individually. The mold core is divided into two or more pieces on a curved plane parallel to the curved central axis of the core and the segments thus formed are retracted from the mold by a combination of arcuate and translational motions to avoid distortion of the fitting ends.

Abstract: A liquid container includes a drop dispensing tip with a hollow stem which defines a liquid passageway and an interior partition wall in the passageway. The partition wall separates the liquid passageway into an upstream chamber and a downstream chamber. Flow communication between these two chambers is provided by a liquid passage in the partition wall. The liquid passage guides liquid against an impingement surface in the downstream chamber from which the liquid is dispensed dropwise.

Abstract: A flush valve is adapted for placement through a hole in the bottom of a toilet tank. The valve seat has an axis with a lower section adapted to extend through the hole and an upper section defining an opening generally perpendicular to the axis. A first sleeve communicates with a central channel in the upper section. A valve elbow has a second axis with an overflow section and a second sleeve registerable with the first sleeve to provide fluid communication between the overflow section and the (central channel) an associated method includes injection molding steps wherein first and second core pins are removed laterally and the second sleeve is inserted into the first sleeve to provide fluid communication between the overflow section of the valve elbow in the central channel of the valve seat.

Abstract: A article with interior interrupted threads and a mold apparatus for manufacturing the same is provided. The molded article includes an aperture positioned completely therethrough as defined by an inner wall. The inner aperture wall carries a series of thread segments positioned about the periphery of the inner wall to form an interrupted helical thread line. The thread segments create a female threaded aperture through the molded article for receipt of a male threaded member therein. The mold apparatus includes an upper half and a lower half. The upper half carries a cylindrical wall which is notched with its upper edge being beveled .outwardly. The bottom half also carries a cylindrical wall which is notched as well as beveled outwardly.

Abstract: A method of molding a trigger sprayer one-piece housing includes molding the housing with a shroud having sides which extend rearward to an integral ergonomic saddle with a surface configured to rest upon the user's hand during trigger sprayer actuation. The one-piece housing is molded integrally with an outlet barrel, a pump cylinder, a vent passage cylinder, and a vertical inlet passage receptacle using the same three-piece mold.

Abstract: A plastic liner for protecting concrete manhole interior surfaces from corrosion wherein the liner includes provisions for creating a strong mechanical lock between the liner and the interior surfaces. A side of the liner which includes the provisions has a plurality of raised hollow projections with spaced sections. The mechanical lock is created when concrete is poured against the side of the liner with the projections. The concrete at least partially enters the hollow portions and fills spaces between the projection sections. The projections also intersect to enhance the mechanical lock by preventing bulging. Liner sections cover essentially all of the manhole interior surfaces. Forming a liner section by rotationally molding the plastic and cutting gaps into the projections is also disclosed.

Abstract: The mold comprises an outer mold part (10) which defines a mold cavity (11). Walls of the outer mold part form the outer surface of the combined engine block and cylinder head. There also are first and second inner mold parts (12, 13) which extend into the mold cavity and are maintained a distance from each other. Each of the first and second inner mold parts have a cylindrical portion (12a, 13a) which, during the casting procedure, forms the cylinder bores in the engine block. The first and second inner mold parts (12, 13) also each have an upper portion (12b, 13b) situated above the cylindrical portion. During the casting procedure the upper portions form portions of a combustion chamber common to the cylinder bores. The mold further includes an third inner mold part (15) which extends through the outer mold part (10) and cooperates with the first and second inner mold parts (12, 13) to form the combustion chamber during the casting procedure.

Abstract: A method of molding the main body of a Y-adapter that has a straight passageway extending from one extremity to the other and an arcuate passageway that is generated along the arc of a circle. Core pins for the straight and arcuate passageways are placed in a mold such that they merges together to form a single, smooth lumen in the Y-adapter. The arcuate core pin can be withdrawn from the finished Y-adapter as a result of its circular arc.

Abstract: A mold for casting an inverted base section of a manhole includes a core for forming an inner surface of the base section, and a jacket surrounding the core for forming an outer surface of the base section. A domed plate atop the core but below an upper edge of the jacket, and having a peripheral shape corresponding to that of the core, seals off the interior of the core and produces the floor shape of the base section. A trough former is placed between opposite interior sides of the jacket and above the domed plate. The flanges of the trough former are cut along arcs conforming to the shape of the domed plate so that cementitious material poured into the mold does not leak between the domed plate and the trough former. Hole formers are similarly seated atop the trough former.

Abstract: A manhole casting setting fixture includes a pair of spaced parallel frame rails connected by a plurality of transverse struts. Four loop handles are secured at opposite ends of the frame rails to facilitate manual manipulation and transportation of the fixture. A pair of clamp mounting blocks are positioned in juxtaposed relation centrally on bottom surfaces of the frame rails. A pair of lead screws extend through respective threaded coaxial bores in the mounting blocks and include handle portions to facilitate manual loosening and tightening of the lead screws. A pair of arcuate clamping jaws are rotatably mounted on oppositely directed end portions of the lead screws.

Abstract: An open and shut molding method of making a paint roller bearing with offsetting core support surface for use in paint roller applicators that permit the user to change a paint roller quickly and efficiently on a paint roller applicator by bringing together a first mold and a second mold until a portion of the molds contact each other to thereby provide central regions in the mold cavity to exclude moldable material therefrom and then flowing a moldable plastic material into the mold cavity formed between the first mold and the second mold and separating the first mold from the second mold to enable removable of a ready to use molded one piece paint roller bearing housing having a central opening extending therethrough for inserting of a shaft therein for rotatable supporting the ready to use paint roller bearing housing thereon.

Abstract: A method and apparatus for manufacturing a bidirectional, corrosion and abrasion resistant gate valve body. In one embodiment, the gate valve body, including flange seals and a liner, are produced in a single molding operation. A mold with appropriate coring either forms or aligns any desired mounting inserts. Coring is also provided to properly form a packing area, gate passage, fluid passages, and flange mounting seals. Once the mounting inserts have been positioned in the mold cavity, the mold sections are secured together, and a filler material, preferably a thermoplastic resin, is injected into the cavity. Upon hardening of the filler material, the inserts are secured into position. Further, the entire body and liner are a single solid unit comprising the packing cavity, the gate slot for sealing flow areas, the flow passages, and the flange rings for sealing connection of the valve to other mating surfaces.

Abstract: A tubular body for reducing the rate at which a fluid flows to a predetermined rate with a resistance in a flow control device of a pressure measuring system, includes a tubular member having an axis along which the fluid can flow therethrough, and a land projecting radially inwardly from an inner wall surface of the tubular member. The tubular member and the land are integrally formed as a unitary structure, the land having an orifice extending along the axis of the tubular member. A method of manufacturing the tubular body, and a flow control device incorporating the tubular body are also disclosed.

Abstract: A mold assembly for use in an injection molding process to mold a one-piece article such as a washing machine tub. The mold assembly includes first and second relatively moveable mold plates, a mold core projecting from the first mold plate, and a plurality of mold sidewall assemblies. The mold core includes an annular outer mold surface portion which tapers inwardly to provide draft to ease the removal of the molded article from the mold assembly, and which is provided with a plurality of generally teardrop-shaped projections. Each teardrop-shaped projection converges to its narrowed end in a direction opposite the direction of removal of the article from the mold core and is configured to further ease removal of the article from the mold assembly. The mold assembly also includes a plurality of core pins mounted on the mold sidewall assemblies.

Abstract: A method and apparatus for forming a curb section of a predetermined length sub-divided into modules by transverse grooves which give the appearance of shorter blocks and provide for fracturing the curb section at those locations. Each module of the curb section includes a rearward fastening projection having a vertical bore for passing a nail to engage the curb section to pavement or other base. Such linear mold sections are all that are required when a curve is dictated. The mold sections are sub-divided into the modules to form the curve. The apparatus includes an open frame moving vertically against a platform and mold shoes for pressing down on the concrete when poured in the mold frame, including plugs for forming the tops of the fastening projections. According to the method, the plugs are removed after the mold frame is lifted, and then the shoes are removed to leave the formed curb sections on the bottom wall.

Abstract: A method and apparatus for molding a product having internal threads includes a threaded mold core and a device for rotating the mold core about the axis of its threads and for axially withdrawing the core from the mold at a rate that is related to the rate of rotation, according to the pitch of the threads. This is accomplished by a cam, which is rotated in synchronism with the device that rotates the core, and a follower for displacing the core as the cam is rotated. The cam follower is fixed with respect to the mold. The cam and threaded core are positioned on a carrier, along with the device for rotating the core, such that rotation of the cam displaces the carrier away from the mold. The core is inserted into the mold, prior to the molding process, by displacing the carrier toward the mold without rotating the core.

Abstract: An integrally molded cross-flow fan has a circular array of angularly spaced, radial vanes. The cross-flow fan is molded with a molding assembly having a plurality of gap-forming molds jointly defining mold cavities for forming the vanes. A molten resin material is supplied into the mold cavities to mold the cross-flow fan. Thereafter, a first group of gap-forming molds are withdrawn radially outwardly from between the molded vanes, and after elapse of a period of time, a second group of gap-forming molds, which alternate with the gap-forming molds of the first group, are withdrawn radially outwardly from between the molded vanes. The gap-forming molds of the first group are simultaneously withdrawn radially outwardly, and after elapse of the period of time, the gap-forming molds of the second group are simultaneously withdrawn radially outwardly.

Abstract: The biaxial CM casting apparatus utilizes one or more main mold cores having an automatically extensible and retractable plunger or like structure extending laterally into the mold cavity from the one or more main mold cores along an axis substantially orthogonal to the axis of casting during certain selected phases of the CM casting process to form one or more openings or other structural changes in the casted concrete which openings or changes extend in the direction of a second axis normal to the casting axis.

Abstract: A CM block machine for casting masonry blocks includes a mold cavity formed between a mold box and a mold core containing one or more plungers selectively extending laterally into the cavity along a second axis which is normal to the axis of casting so as to form openings extending through portions of the block in the direction of the second axis. The plunger(s) is disposed in a cartridge housing contained within the mold core. An oversized vibrating ring wiper mounted in the cartridge housing engages the external periphery of the plunger to prevent CM material from entering the cartridge during plunger retraction. The plunger includes an annular relief chamber formed in a side wall thereof to provide an additional volume of air from within the cartridge to an air passage communicating with the plunger end face to prevent vacuum from impeding plunger retraction.

Abstract: A method of making a measuring and dispensing apparatus molded in one piece for placement in a neck of a flexible wall container is provided. The apparatus has side walls, a base wall, an open top and an upstanding central member which contains a central bore and side or lateral discharge ports for directing the flow of liquid at an angle offset from the axis of the central upstanding member. The method of making the measuring and dispensing apparatus involves injection molding utilizing upper and lower mold halves in conjunction with a center core pin and retractable orifice pins. The center core pin forms the bore present in the upstanding member of the apparatus and the orifice pins form the lateral discharge ports present in the upstanding member.

Abstract: A method provides a mold for producing a product where the product includes material over an undercut opening in the product. The mold comprises first and second mold sections which open and close relative to one another and the first mold section in itself includes mold parts which open and close relative to one another. The mold is arranged such that when the first and second mold sections are closed, the mold parts of the first mold section are also closed to define a mold cavity between the mold sections and further including a cavity region for forming the material over the undercut opening between the mold parts of the first mold section. The mold then opens in a manner in which the first and second mold sections are opened which then allows the mold parts of the first mold section to open for releasing the product from the mold.

Abstract: A liquid tight connector for affixing, in a liquid tight manner, to a conduit having a ridge located adjacent to its end, wherein the conduit extends into a bore (5) and abuts against a sealing surface (6) and is held in liquid tight engagement therewith. A locking member (9) projects into the bore (5) and locks on to the ridge of the conduit.

Abstract: An elastomeric-covered shrouded impeller having a pair of disk-like shrouds enclosing vanes and vane passages which has an improved throat opening having sweeping internal sidewalls is disclosed. A three-piece mold core is utilized to form the vane passage and the sweeping curved throat inlet of the impeller.

Abstract: A single-piece foam pattern for use in the lost foam casting of a ported cylinder sleeve is formed in a molding tool having a pair of displaceable elements and a removable center core. Ports, of preselected size, shape and location, are defined by movable cores which are extended into position between the displaceable elements and the center core. Following introduction of a molding material, the movable cores are retracted after which the mold elements and center core are separated and the foam pattern is removed.

Abstract: Apparatus for forming inverts in a manhole base comprising at least one adjustably positionable channel-forming member for forming an invert which communicates between associated sidewall openings of a manhole base. Flexible members join the ends of the invert form. The adjustability of the channel-forming assembly extends over a range of angles which are both greater than and less than 180 degrees.

Abstract: A method of making a molded plastic component of an internal combustion engine. The method is for making a fuel rail and includes constructing particular core pins of the mold with threaded connections that form seals between them when they are disposed in proper position within the mold cavity for the molding of a fuel rail. The core pins serve to form a main fuel passage and auxiliary fuel passages which transversely intersect the main fuel passage. Each core pin that forms an auxiliary fuel passage includes a screw thread on its inner end that threads into a corresponding complementary threaded recess in the side of the core pin that forms the main fuel passage to create a corresponding seal. This sealing prevents any significant flash from forming in the fuel rail at the intersection of each auxiliary fuel passage with the main fuel passage. After the plastic has been molded, the core pins are unthreaded and withdrawn.

Abstract: A method for forming an as-cast hole by using a core involves forming an undercut and casting by using a core die which is slidable at an angle with respect to mold closing and opening directions. At the same time, an as-cast hole with an axial direction different from the slide direction of the core die is formed. To form the as-cast hole, a floating core is slidably disposed in the core die for movement in the axial direction of the as-cast hole. An apparatus for practicing the method includes a stationary die, a movable die and the core die containing the slidable floating core.

Abstract: The biaxial CM casting apparatus utilizes one or more main mold cores having an automatically extensible and retractable plunger or like structure extending laterally into the mold cavity from the one or more main mold cores along an axis substantially orthogonal to the axis of casting during certain selected phases of the CM casting process to form one or more openings or other structural changes in the casted concrete which openings or changes extend in the direction of a second axis normal to the casting axis.

Abstract: A three part mould for an engine cylinder block which has several aligned cylinders with parallel axes, several bearings for mounting a crankshaft having an axis perpendicular to the cylinder axes, voids formed around the cylinders, and recesses between the bearings and the cylinders, includes an upper segment, a lower segment and a central segment. The three segments are superposed in the direction of the cylinder axes. The upper segment forms the cylinders and at least one portion of the voids. The lower segment forms the bearings and at least one part of the recesses. The central segment forms matching parts of the voids and the recesses.

Abstract: A die member for forming a foam pattern for casting a cylinder block in a lost foam casting process, the pattern having a cylindrical bore with an axis, and a helical transfer passage including a first portion permitting die member separation in a direction along the axis of the cylindrical bore and an undercut portion preventing one-piece die member separation in the direction along the axis of the cylindrical bore, the die member comprising a main portion forming at least a portion of the cylindrical bore and including a projection forming a first part of the first portion of the transfer passage, and a core carried by the main portion and movable relative to the main portion along a line in a plane substantially perpendicular to the axis of the cylindrical bore, the core being movable between an extended position in which the core forms a second part of the first portion of the transfer passage and the undercut portion of the transfer passage, and a retracted position in which the core affords separation o

Abstract: Apparatus for the production by powder metallurgy of a heat exchanger block in which two spaced concentric half shells are provided with holes in which profiled pipes are inserted. The profiled pipes are internally supported by pins when metal powder is injected into the hollow space between the half shells for forming a wall section of a header. The radially outer half shell is formed by a plurality of half rings arranged with their side faces in contact with one another and the half rings are individually removed after the wall section is formed.

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: An assembly is provided for installing a resilient gasket having a projecting, pipe-engaging portion and an anchoring portion fixed in the peripheral wall of a circular opening in a masonry manhole construction, the masonry manhole construction having an inner face and an outer face. The assembly consists of an inner mold disc of a particular recited shape, an outer mold disc of a particular recited complementary shape, and a rectangular fixing bar including a plurality of longitudinally spaced-apart holes therein, and bolts passed through aligned selected apertures in the rectangular fixing bar, in the inner mold disc and in the outer mold disc. In such assembly, the inner mold disc is temporarily secured to the outer mold disc with the elastomeric gasket locked therebetween. A flange is provided at the upper end of the rectangular fixing bar for suspending the assembly from the masonry manhole construction.

Abstract: A cover for a storm drain collection box is formed usig falsework that includes a portion that is prefabricated and another portion that is constructed in-situ. The prefabricated portion of the falsework is used to form the throat section of the collection box inlet and can be mass produced under quality- and research-controlled conditions. The in-situ constructed portions of the falsework permit it to be modified according to the needs of the particular collection box. Alternatively, both the cover and the collection box can be precast for in-situ assembly.

Abstract: An injection mold having a pair of stationary and movable molding plates, a plurality of sidewalls moved by one or more hydraulic cylinder assemblies disposed between the stationary and movable molding plates through inclined guide pins or guide blocks, a core member provided with a slanting surface and secured to the movable molding plate inside the sidewalls, and slide core members being movable in engagement with the core member. The respective sidewalls, and the sidewalls and the slide core members are connected by a connecting mechanism including link plates and connection plates so that the sidewalls and the slide core members are substantially simultaneously moved by at least one of the hydraulic cylinder assembly.

Abstract: The invention relates to an open type box-unit with multi-purpose application for the complex industrial construction of prefabricated houses, of buildings with different numbers of stories, and to molding apparatus for its production. The box-unit has a floor and roof structure with a spatially reinforced concrete framework consisting of two longitudinal frames and transverse frames; the cross bars of the longitudinal frames have a reinforced cross section asymmetrical to the cross section of the columns and an uninterrupted reinforcement in a closed shape. At modular distances in the cross bars of the longitudinal frames there are provided critical zones with cross sections doubled with regard to the cross bars and the columns of the end transverse frames. These critical zones are designed for the connection of the reinforcement of the cross bars and the columns of the middle frames having variable cross sections.

Abstract: An improved, one-piece slide clip suitable for molds having at least one cam-actuated slide for pulling a core element outward and inward from the parting line of the mold as the mold is opened and closed, the said slide clip being wholly enclosed within the mold and non-restrictive of the normal and required movements of the mold remains inoperable until such time the slide moving along the cam outwardly is gripped by the jaws of the clip upon the removal of the cam from the slide, during the opening operation, holding the slide in a cam-aligned position, releasing the slide only upon the re-engagement of the cam pin into the slide during the closure of the mold, thereby allowing the slide to return to the molding position in the fully closed mold.