Abstract: A method for axially extracting a rubbery hose article of manufacture of great length from the correspondingly long core about which the article has been formed and vulcanized, comprising the steps of positioning the article having its core thereinto on an correspondingly long longitudinally displaceable support having an upper surface adapted for frictionally engaging the hose article, securing one end portion of the core, external to the hose, in a stationary location, and longitudinally displacing the support for spacing the same from said location, whereby a pull is exerted at any point of the length of the hose for causing the core to be extracted from the hose. A device for carrying out the method.

Abstract: A method for molding a plastic closure cap unit for a container, which cap unit comprises an internally threaded upper closure cap and a downwardly extending skirt forming a sealing ring connected thereto through an intermediate shear zone of reduced thickness, the sealing ring increasing in thickness downwardly from the shear zone and being devoid of abrupt changes in contour such as would preclude axial removal of the cap and sealing ring from a non-expanding mold surrounding the sealing ring, comprises injecting molten plastic into a mold shaped to form the cap unit and including fixed and movable sections forming mold surfaces, disengaging the mold from the outer surface of the upper closure cap by axial movement of the related mold section relative to the remaining sections, then disengaging the mold from the inner surfaces of the closure cap and sealing ring by axial movement of the related mold section relative to the remaining section of the mold still surrounding the outer wall of the sealing ring up

Abstract: The present invention relates to a device used in capsule-making machines which, after the gelatin has cured, strips it off the tapered forming pin. More particularly, the device is a plastic ring having a spring metal split ring insert embedded therein along with an external anti-creep spring to maintain proper dimension of the device.

Abstract: A mold, for screw-threaded articles, has screw-thread forming spindles rotatable by obliquely toothed gearing so as to apply axial thrust to the spindles and thus compensate for friction and adhesion in unloading of the mold.

Abstract: A method and apparatus are disclosed for injection molding tubular plastic articles around cylindrical core pins at a molding station, for cooling the articles while supported on the core pins, and for then axially stripping the articles from the core pins at an ejection station. The article stripping step is accomplished by a horizontally reciprocable carriage which is selectively moved into and out of vertical alignment with a set of core pins and molded articles positioned at the ejection station. Sectional gripping members on the carriage are radially closable when in alignment with the molded articles, to grasp the articles for their axial removal from the core pins upon the horizontal displacement of the carriage. The stripped articles may be held in a horizontal cantilever position between the gripping members during an operational dwell time for additional cooling subsequent to their removal from the core pins.

Abstract: A machine for making a dry cast concrete pipe. The machine has a cross head carrying a rotatable shaft extended downwardly into a core supported on a turntable. An outer form mounted on the turntable surrounds the core. A head attached to the lower end of the shaft is engageable with the core to raise the core out of the outer form in response to upward movement of the cross head. Arms secured to the shaft above the core rotate with the shaft to move concrete from the top of the core into the annular chamber between the core and outer form. An annular press ring mounted on a top table is moved into the top area of the annular chamber to compact concrete before the core is withdrawn from the outer form.

Abstract: Thermometer probe covers having an extremely thin wall integral tip for enhanced heat transfer are injection molded by unique mold core construction and venting configuration. A tungsten carbide core minimizes core deflection to maintain improved concentricity of core and cavity. Maintainance of concentricity in quantity production apparatus is improved by a combination of relatively loose cantilevered mounting of an end of the core together with a press fit locking of the core upon closing of the mold. Venting of cavity gas during injection of mold material is precisely controlled through symmetrically distributed vent orifices in both the core and the female mold part. Core venting is controlled by a plurality of orifices and a manifold provided by a water cooled core vent pin within a bore of the core.

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: Various forms of apparatus are described for manufacturing half seal units by injection molding in specially constructed molds. The apparatus was developed in response to a need for producing precision parts, particularly so-called insert molded parts containing integral stiffening members surrounded by an elastomeric seal body. Seals of this type are mated upon installation in position of use to form a unitary seal which provides primary and secondary seals as well as a seal at the split line where the two half seals are joined. One described molding apparatus includes means adapted for formation of a mold cavity from horizontally movable, cam actuated mold parts wherein finished so-called piece parts are removed after molding by an axial movement with a specially constructed stripper assembly.

Abstract: A die cavity is delineated by the surfaces of a pair of die members and the threaded surface of a first of a pair of thread engageable members, one of the die members thread engaging a part of the threaded surface. A synthetic polymeric resin is injection molded in the cavity to produce a second member in precise thread engagement with the first member and the cavity is then opened to release the thread engaged members.

Abstract: A bottle cap is constructed with stepped portions, including a large diameter serrated lower portion, an intermediate diameter threaded portion, and a smaller diameter serrated upper portion. The cap is produced by deep drawing on a mold core having a base portion carrying a pedestal, to which a thread-forming portion is rigidly secured. A large diameter, lower serration-forming portion and a small diameter, upper serration-forming portion are rotatably mounted on the pedestal below and above the thread-forming mold portion, respectively. After the bottle cap is formed the pedestal is rotated, to disengage the completed cap from the mold core.

Abstract: An apparatus for automatically removing a mandrel from a tubular article which utilizes a positioning and stopping means to rearrange the position and retain the tubular article after it has been formed. After the tubular article has been stopped a gripping and moving means operate to automatically remove the mandrel from the tubular article and return the mandrel to a storage area.

Abstract: A half-section of a cassette casing having an embedded transparent wafer serving as a viewing window. The cassette casing section is formed by shearing the wafer from an elongated strip of transparent material, disposing and supporting the wafer within a cavity, and forcing a plasticized material into the cavity where it solidifies. The cavity is defined in an injection mold comprising a pair of relatively movable cavity plate assemblies with which are associated means for shearing and supporting the wafer.

Abstract: An article having two sections which are articulated to one another by at least one hinge that includes a substantially spherical male hinge member disposed within a recess provided by a surface of a female hinge member. The hinge includes retaining means for confining the male hinge member within the recess while permitting rotational motion of the male hinge member within the recess. The male member is a continuous molded extension of one section of the article and the female hinge member is a continuous molded extension of the other section of the article.A mold for use in manufacturing the above-described article includes upper and lower mold sections which, when brought into mating relationship with each other, provide article section forming compartments adjacent to each other for forming the sections of the article. A female hinge member forming compartment communicates with one of the section forming compartments. A mold segment interrupts the female hinge member forming compartment.

Abstract: A machine for molding a plurality of tubular articles and gang stripping them in one operation. The mandrels for molding the articles are mounted between the mold platens in a frame having a front cross bar which has cavities forming the ends of the articles. When the platens are separated and the mold opened, the frame is moved laterally of the machine and the cross bar is automatically moved away from the ends of the articles to a removable position. A stripping rack is then moved manually into position to clamp and strip all of the articles simultaneously from the mandrels.

Abstract: An apparatus for molding plastic sheet and the like by a thermoforming process, wherein an overhanging hollow portion is formed in the molded sheet by a retractable mold portion having a plurality of resiliently connected elements which may be moved relative to each other as the mold portion is withdrawn from the overhanging, formed sheet portion. In the illustrated embodiment, a plurality of spring means are provided for providing different positioning functions in arranging the movable mold portion in the desired configuration.

Abstract: A die mold is disclosed for the manufacture of crate like containers having lateral walls at least the upper portion of which are double-walled to provide substantial stability to the container and strength to the container walls. The die mold includes a base plate, lateral wedges which move upwardly and downwardly at an angle to the vertical during opening and closing of the mold, and slider means which are positioned on the lateral wedges and are movable with respect to the lateral wedges in a reciprocal direction relative to the walls of the containers formed by the die mold. Holding means is provided for holding the slider means in the same position relative to the container during mold opening, and control means are provided to permit the slider means to move back from the container walls after the container has been moved a predetermined distance away from the base plate.

Abstract: A method and apparatus for making concrete slabs to be used in the construction of walls or floors in buildings. The slabs can be made of desired thickness as, for example, from 8 inches to 24 inches and of lengths which also are optional as, for example, from 8 feet to 12 feet. Assemblies of core members are disposed on opposite sides of a cavity, to be moved back and forth with respect to the cavity for molding recesses in opposite edges of a slab and to be retracted therefrom when the concrete has set to the desired extent. The mold assemblies each comprises a plurality of core members spaced longitudinally of the cavity and when moved to inner positions will leave an open space therebetween for molding a central web in the slab, with transverse webs extending out to the lateral edges of the slab. Additional core members may be disposed between the main core members. The small core members will form longitudinal openings through the slab. The release of the mold assemblies is in two steps.

Abstract: A core is provided, useful in the manufacture of closure caps, each closure cap having a top, dependent skirt and securing means, comprising intermittent or interrupted threads or hold-down lugs.

Abstract: Concrete structural members are cast in a metal mold form which comprises side members closed off by a horizontally extending resilient pallet. The side members have affixed thereto at their lower ends adjustable swivel arm actuating mechanisms adapted to flex the side members laterally away from one another to enable stripping of the cast member from the form. The resilient pallet forms the bottom surface of the mold form and etablishes a seal to prevent slurry leakage. The pallet is supported by a roller transfer assembly that enables the cast member to be transported to another operating station after the cast member has been stripped from the form. The transfer assembly is adjustable in height by means of a swing arm assembly which in addition to setting the depth of the casting also causes the cast member to be elevated clear of the form to enable it to be removed therefrom.

Abstract: Apparatus is provided for shaping a generally elongate strip of lubricant wicking material and placing it into a component for a dynamoelectric machine. In this apparatus, means is provided for receiving the strip when it is introduced thereinto, and means associated with the receiving means is operable generally for moving the strip therefrom and converting the shape of the strip into a predetermined configuration. Means is provided for predeterminately locating the dynamoelectric machine component on the apparatus with respect to the moving and converting means, and means is operable for displacing the strip generally in its predetermined configuration from the moving and converting means into place within the dynamoelectric machine component.

Abstract: An apparatus for handling compacted blocks of compost, soil or the like material comprising a chamber defined by two relatively movable plates in which a batch of material is compacted at a compacting station. The chamber is moved to a depositing station at which the block is removed by firstly retracting one of the plates while the other plate holds the block, and then by retracting the other plate, leaving the block deposited on a platform. The apparatus desirably is in the form of a wheel assembly having plates defining a number of chambers radiating from the wheel axis and there is means for indexing the wheel so that each chamber moves in turn from the compacting station to the depositing station.

Abstract: A flexible printing plate is separated from the inner surface of a curved matrix after formation of the plate in a mold by first moving the ends of the plate inwardly away from the matrix, while maintaining the center of the plate in stationary contact with the matrix, and then moving the center of the plate inwardly away from the matrix, while maintaining the ends of the plate away from the matrix. The matrix is held in an outer mold half, and the printing plate is formed in a mating inner mold half having a center section wih sloping side surfaces that converge toward the outer mold half, a first end section having a side surface contiguous to one sloping side surface of the center section, and a second end section having a side surface contiguous to the other sloping side surface of the center section.

Abstract: A moulding process includes closing a multi-part die onto hollow-forming members to produce a hollow core mould. The mould is used in the "cold" process to produce a hardened foundry core about the cavity-forming members. Parting the die causes the cavity-forming members and the hardened core to be pivoted so that the hardened core rests on a conveyor belt with the longitudinal axes of the cavity forming members aligned with the longitudinal axis of the conveyor belt and with the cavity forming members lying in respective slots in a web fixed transverse to the conveyor belt. Subsequent movement of the conveyor belt causes the web to abut the hardened core and to extract the cavity-forming member from the hardened core as the hardened core is moved on the conveyor belt. In a modification of the process, the cavity forming members are partly extracted from the hardened core before the pivoting movement takes place.

Abstract: Molding devices and methods for producing a low cost, multi-element, adjustable focus lens assembly for use in photographic apparatus. The assembly features a two-part molded plastic lens mount comprising forward and rear mounts, each having an uncentered lens element insert molded and centered therein and an integrally molded screw thread for coupling the forward and rear mounts together. The molding devices comprise cavity molds having movably mounted zonal clamps therein for centering the lens element within the cavity and for disengaging the molded mounts from surfaces in the molds that form the screw threads.

Abstract: Apparatus for molding, in a single integrated operation, a tubular part having an internal recess which may take the form of a groove extending completely around the inside of the part for receipt therein of an O-ring or the like. The apparatus comprises a core assembly having a longitudinal axis, and base means movable along the axis and defining an annular outer mold surface for forming of the interior wall of the tubular part. The core assembly further includes a plurality of groove-forming segments carried on the base means adjacent to the annular surface and movable between first contracted positions and second expanded positions. When the segments are in the contracted positions they do not extend radially outwardly of the annular surface, and the surface and segments may be withdrawn from the molded tubular part by movement along the longitudinal axis.

Abstract: This invention relates to a plastic closure or cap-type stopper of which the outer skirt has formed on its inner surface a plurality of ribs adapted to engage the top ring and the grooves of the neck of the container to be stopped, on either side of a partially tearable guaranty strip bounded by circular thinning grooves formed in the inner surface of the skirt.The mold for manufacturing this closure comprises underneath a fixed plate formed with holes for the passage of the ejection ring and ejection shaped sleeve of a sliding plate perforated like the fixed plate and actuated by a pusher, and above a sliding impression plate of which the perforation corresponding to the preceding ones bounds the injection chamber for the closure skirt on the core, said sliding impression plate being actuated by a pusher for releasing the closure from the mold impression at the end of its stroke.

Abstract: An expandable poincon assembly to be used for forming a headpiece onto a preformed thin-walled plastic or laminate tube or bag provides a poincon upon which the loose fitting preformed thin-walled tube can be loaded. After tube loading, the poincon is inserted into a female forming member. Toward the end of the poincon's insertion stroke, a soupape which is mounted for axially movement within the head end of the poincon contacts the female forming member and then partially retracts into the head end of the poincon as the poincon continues to advance to the end of its insertion stroke. A conically-shaped washer mounted on the bottom end of the soupape is peripherally expanded by the continued advancement of the poincon after the top end of the soupape has contacted the female forming member.

Abstract: A molded plastic J-shaped trap or conduit has a U-portion with a laterally curved or slightly helical configuration to provide for automatically producing the conduit within a multiple cavity injection mold. The mold includes a set of mold sections which define a U-shaped cavity having a slight helical configuration, and a slight helical U-shaped core member is supported within the cavity by a core support rod and a set of core slides which engage opposite ends of the core member. The core member and one of the core slides are adapted to be elevated after the mold sections are opened to remove a molded conduit from the cavity, and the core member remains supported by the core support rod which extends through the one core slide. The molded conduit is stripped from the core member by an annular stripping plate which is moved by an actuator along the core member in a helical path, and the conduit is directed past the core support rod as the conduit is being stripped.

Abstract: An injection mold is disclosed for making an article having a plurality of side walls defining an enclosure. The mold elements during opening and closing of the mold move in a coordinated manner via mechanical interlocks. A first mold section carries plural side wall members that slide between a closed position and an open position. A second mold section interlocks with the side wall members to carry them from their closed to their open position and the side wall members are themselves linked to a stripper ring that strips the article from the mold. Other features are disclosed.