Abstract: Apparatus for heating and cooling a mold onto which thermoplastic material is cast and fused to form a finished article includes a plenum having an inlet and an outlet for connection to a fluid heating and cooling system and a mold box having a plurality of cavities for selectively receiving interchangeable tube bundles that are selectively positioned in a movably sealed relationship within the mold box and wherein each tube bundle has a mold and a tube array that are maintained in a fixed relationship during interchange thereof into and out of said mold box so as to maintain individually heat balanced molds.

Abstract: To simplify the cleaning and maintenance of a meltblowing head, the lips defining with the spinneret the flowing slits adjusting the row of orifices can be swung away from the spinneret on respective lip guides pivotally connected to respective setback bars. The setback bars can be adjusted and locked in place with respect to the blowing housing and the lips can be adjusted and locked in place relative to the lip guides independently of the swinging action.

Abstract: Apparatus for differential pressure forming an article in a thermoplastic sheet including a female mold cavity mounting a one piece, ring-shaped detachable mold insert for forming at least a portion of the article. The insert is formed by rolling a crescent shaped sheet, having opposite ends into a truncated cone with opposite ends thereof in abutting relation, inserting the truncated cone shaped mold insert into a mold cavity, and applying endwise force to the ends of the mold insert to detachably secure the mold in a mold body.

Abstract: An apparatus for the production of molded shells and bodies of plastic material by a rotational molding procedure within an electroplate mold includes a double-walled hollow body which is heated up and cooled down by a heating and cooling medium. A box which contains plastic material can be fitted on to the mold. The mold and the box are jointly pivotable so that the plastic material can pass into the mold and fuse at the wall of the mold. At its rear wall, which is remote from the internal contour which produces the molding action, the double-walled hollow body has a multiplicity of intake and discharge openings for the heating and cooling medium so that heating and cooling can be effected specifically and quickly. The total discharge cross-section is greater than the total feed cross-section whereby the hollow body remains substantially pressure-less.

Abstract: An exhaust system for exhausting fumes released from a melt spinning process has a housing defining an exhaust system, a nozzle assembly extending partially from the housing toward the fume source with a nozzle tip disposed sufficiently close to the fume source to collect the fumes, a duct in communication with the exhaust chamber and having an outlet for exhausting the fumes, a driving force moving the fumes through the system from the nozzle to the outlet, and a method for automatically purging the exhaust system of condensed fume deposits.

Abstract: An apparatus for the production of a symmetrical oval concrete pipe including an oval male joint member and an oval female joint member formed on opposite ends of an oval pipe body having a form including an outer jacket and an inner core disposed in spaced relationship relative to each other to form the oval pipe body therebetween; an upper pallet and a lower pallet configured to form the oval male joint member and the oval female joint member respectively, and a pallet positioning structure configured to engage the upper pallet and the lower pallet to operatively position the upper pallet and lower pallet relative to the outer jacket and inner core such that corresponding points on the upper pallet and the lower pallet are aligned relative to each other whereby corresponding points of the oval male joint member and the female joint member are aligned relative to each other.

Abstract: A bladder bladderless-type dual-purpose tire vulcanizer wherein a lower center mechanism for the bladder type and a lower center mechanism for the bladderless type are interchangeably mounted on a lower platen which supports a lower half of a mold. An upper center mechanism for the bladderless type is vertically movably mounted, between an operating position and an upper waiting position, on an upper plate which supports an upper half of the mold. An upper bead ring for the bladder type and an upper bead ring for the bladderless type are interchangeably mounted on the upper half of the mold. Furthermore the lower center mechanism is provided with a lower bead ring, and upper and lower domes for enclosing and clamping the upper and lower platens.

Abstract: An improved part removal assembly (17) particularly for a shuttle-type blow molding machine (10). The part removal assembly includes a plurality of suction cups (95) mounted on a vertically moveable piston (87) that travels along a vertically oriented rodless cylinder (81) and a plurality of suction cups (115) mounted on a horizontally moveable piston (107) that travels along a horizontally oriented rodless cylinder (83). A mold assembly (15) shuttles between an extruder head assembly (11) where a plurality of parisons of molten plastic are captured in mold cavities (25) in the mold assembly, and a blow station assembly (13) where the parisons are blown to form a molded workpiece (31). The mold assembly then opens which causes a flash removal assembly (57) to remove a waste flash portion (55) from a bottom portion (31a) of the workpieces. The bottom of the workpieces are then engaged by the vertically moveable suction cups which lower the workpieces to a position adjacent to a conveyor (117).

Abstract: In a tube eversion apparatus a first chamber in which the eversion pressure is developed is controllably sealed by a sphincter-type valve, the valve being in turn actuated by pressure developed in a preferably separately controllable and adjustable second chamber, another chamber preferably being provided above the sphincter-type valve for containing a supply of liquid and limiting turbulence from any escape of fluid past the sphincter-type valve, the other chamber also providing apparatus for supplying heated fluid to a lay-flat hose adapted to be pulled through the spincter-type valve by the tube being everted. Use of the improved apparatus involves appropriate modifications of the usual eversion process involving applying and controlling the everting pressure and the pressure exerted against the sphincter-type valve by the fluid in the second chamber.

Abstract: A method and an apparatus for vulcanizing an elastomer product, such as automobile tires, wherein the elastomer product is placed in a vulcanizing chamber in a mold steam at an elevated pressure is supplied to the vulcanizing chamber to heat and pressurize the elastomer product until the elastomer product reaches a prespecified temperature or for a prespecified period of time, the steam supply is stopped and a pressurizing gas, at a pressure not lower than the steam supply pressure, is supplied to the vulcanizing chamber until the end of a heating period, said steam being blown in and supplied from an upper position of the center of the vulcanizing chamber in a horizontal direction or in an inclined downward direction, said steam being blown in and supplied from a lower position of the center of the vulcanizing chamber toward an upper region of the vulcanizing chamber.

Abstract: In an apparatus for the shaping and compacting of absorbent pads for absorbing body fluid, which are intended for articles of hygiene and which consist of a plurality of part layers and, if appropriate, are treated with a superabsorbent agent, to form at least one absorbent-pad layer. A rotary band has arranged on it over the entire length of the rotary band, at distances from one another, trough-shaped insertion molds into which shaping insets can be inserted. Along the rotary band production devices are arranged, in twos respectively along the linear outward path and return path, and in the opposite direction to the rotary band there is a driving band which can be pressed against this, and furthermore there is arranged a thermal compacting device which has calender and/or embossing rollers following in the conveying direction and which consists of a heating cylinder with a pressure band arranged on it.

Abstract: The invention relates to a calibrating device for extruded plastics sections, having a number of calibrating units 5 to 7 disposed successively in the drawing-off direction. The calibrating units 5 to 7 are mounted on a guide 1, 2 floatably in the plane normal of the drawing-off direction and disposed on the guide 1, 2, securably in the drawing-off direction. A calibrating device of the kind specified ensures that the precise positioning of the successively disposed calibrating units 5 to 7 is superfluous. Since therefore the section passes the individual calibrating units without lateral deflection or jamming, the individual calibrating unit can be designed with close dimensional tolerances, utilizing the loadability of the section, without introducing an excessive shrinkage into the section.

Abstract: A formwork for a draft tube which includes ganged precast forms, each precast form corresponding to a curved segment of the draft tube. The precast forms are molded with continuous side plates extending thereabout and anchored in the precast concrete form and projecting beyond the surface opposite to the contact surface to provide a flange. A fastening means for attaching adjacent forms with a space therebetween to allow for stripping. A method includes determining the outline of the inner surface of the draft tube and dividing it into segments and preparing molds to make precast forms corresponding to each segment. The precast forms are assembled and shored to provide the draft tube ganged formwork, and concrete is poured about the draft tube formwork and is cured. The precast forms are stripped from the set concrete structure and reused in another draft tube formwork.

Abstract: Apparatus for removing gaseous monomer emitted during the manufacture of polymer fibers collects the gaseous monomer in a suction nozzle constructed of smooth polymeric material having low heat conductivity to avoid monomer buildup therein and delivers same upwardly through a water trap to a transport duct which is kept sufficiently wet to receive and remove monomer solids carried in the water which flows by gravity in the duct.

Abstract: An apparatus for production of a continuous plastic sheet (2) includes structure for the forming of at least one layer cast in the liquid state of this plastic material, or a reaction mixture of reactive components, on a mobile support of glass plates (1) placed edge to edge and carried by a conveyor, followed by the setting of the layer formed on the surface of the glass plates and pulling off the set sheet. Strips (3) of flexible material are inserted between the adjacent glass plates. The adjacent edges of the glass plates are covered, before the casting is performed, by a ribbon (4) of a material nonadherent to the glass, which overlaps the section of the inserted strip or strips. After having been positioned on the glass plates, the ribbon is made temporarily adherent to the latter upstream from the casting in the liquid state by electrostatically charging with opposite charges the glass plates and the ribbon.

Abstract: Vulcanization apparatus to vulcanize, with the heat and pressure of a fluid, a molding of rubber belt material (before being cut crosswise into the final products) while the molding is being held intact over the external circumference of a hollow cylindrical mold. A steaming jacket is provided into which the mold with the molding sticking intact thereto is inserted. The steaming jacket comprises a rubber sleeve on the interior of a cylindrical casing and secured and sealed at upper and lower axial ends of the rubber sleeve against the casing. The sleeve is swelled inwardly when heated high pressure fluid is passed through an internal space between the casing and the sleeve. The vulcanization apparatus is provided with steam supply and discharge pipes for the internal space of the jacket and steam supply and discharge pipes for the mold inserted into the jacket.

Abstract: An apparatus (40) for molding a thin walled plastic shell includes a mold box (42) having an inner mold surface (48). A powder box (52) includes an internal chamber and first divider wall (54) for separating the internal chamber into at least two sections (56,58). A carrier framework (60) is removably mounted on the mold box (42) and includes a peripheral seal for perfecting a seal between the mold box (42) and the powder box (52) when the same are connected thereto. A second divider wall (64) is connectable to the first divider wall (54) separating the inner mold surface into two chambers continuous with the two sections of the powder box (52). The carrier framework (60) further includes a mold surface seal (66) for perfecting a seal between the second divider wall (64) and mold surface (48).

Abstract: The invention provides means for removably attaching ejector pins for an injection molding machine to a movable knock-out plate. The knock-out plate has slidably attached thereto a latch plate to engage ejector pin heads and thereby secure them to the knock-out plate.

Abstract: An apparatus for forming a particle mat for the production of particleboard has a transport belt having a stretch moving in a longitudinal transport direction and forming a deposition surface in turn defining a floor of a deposition space, a dispenser upwardly delimiting the space and including a dispensing roller for depositing particles as a mat in the space on the longitudinal moving deposition surface, a pair of transversely spaced and longitudinally extending upper guides extending in the space generally at the dispenser, and a pair of transversely spaced and longitudinally extending lower guides extending in the space underneath the respective upper guides and generally at the deposition surface. A pair of longitudinally extending, continuous, and transversely spaced flexible sheets each extend the full longitudinal length of the deposition space and have an inner edge secured to one of the guides of a respective one of the pairs of guides and an outer edge.

Abstract: A tablet making machine of the kind including a rotor having a die table carrying dies and opposed pairs of punches which operate in the dies, under the control of fixed position cams to form tablets in the dies is described. The rotor is carried by bearings mounted on an intermediate axially extending portion of a spindle fixed on the machine frame at its opposite ends. The rotor is made removable from the machine together with the intermediate spindle portion and the rotor bearings for replacement by a separately serviced rotor. In this fashion, downtime is reduced for tool and product changeover.

Abstract: Apparatus for vertically adjusting the position of a lower mold relative to an upper mold to control the shut height or spacing between the upper and lower molds when they are moved between vertically spaced apart, open positions, and closed positions engaging opposite sides of a thermoplastic sheet of material to form an object therein.A plurality of toggle links are pivotally coupled to each other and to the mold and frame for determining the final position of the mold and the closed position.The toggle link mechanism for the lower mold is mounted on the frame via a horizontally adjustable wedge mechanism which vertically adjusts another cooperating wedge mounting one pivotal end of the lower toggle links.

Abstract: A roller head opening and closing apparatus in a roller head extruder includes parallel upper and lower rollers disposed at an extrudate outlet end of the extruder and having axes extending orthogonal to the longitudinal axis of the extruder. Two frames are rotatably journaled at opposite ends of the rollers and can pivot about the axis of the lower roller. Actuators pivot the frames from a position in which the roller axes lie in the same vertical plane to a position in which the upper roller is swung away from the extrudate outlet so that a maintenance space is created between the extrudate outlet and the upper roller. This permits the use of a stationary electric motor for driving the lower roller, and so avoids the need for electrical contacts which compensate for motor movement.

Abstract: A pellet mill comprises a perforated annular pellet die having an axis of rotation and first and second ends; and a die carrier rotatable about an axis of rotation and having an annular recess for receiving the first end of the annular pellet die. Fixing devices are secured to the first end of the die and cooperating fixing devices are provided in the annular recess in the die carrier. The fixing devices and the cooperating fixing devices have a first position relative to one another permitting insertion of the first end into the annular recess by relative axial movement of the die and die carrier and a second relative position permitting the transmission of force between the fixing devices and the cooperating fixing devices to draw the die towards the die carrier into a clamped position. Various different devices are provided for generating the force. In addition centering devices are provided which are effective on drawing of the die towards the die carrier to center the die relative to the die carrier.

Abstract: A die exchanger of a molding apparatus includes a die plate, a die carrying-in apparatus and a die carrying-out apparatus. The die carrying-in apparatus has at least one guide groove engaging a pin of the die and guiding a plurality of corresponding dies and has a first support plate movable forward and backward to the die plate so that the guide groove is connectable to a groove in clamp means provided on the die plate. The die carrying-out apparatus has a second support plate movable forward and backward to the die plate so that the second support plate can receive the die engaging the clamp, the second support plate movably supporting the die. The die carrying-in apparatus has a one-way feed mechanism feeding each of the corresponding dies which is supported by means of the guide groove of the first support plate to the die plate. The die carrying-out apparatus is tiltable for discharging the die.

Abstract: A diverter chute assembly for automatically separating the molded part from the runner in the injection molding process. The diverter chute assembly has a deflection plate pivotally mounted within a housing. The deflection plate is responsive to control signals generated in synchronization with the ejection of the product and the runner such that the product is directed to a first collection area and the runner is directed to a second collection area. Chute diverters permit flexibility in the placement of collection bins which gather the parts and runners.

Abstract: The method of repairing a tooth involves positioning a selected medium contiguous a location of the tooth to be repaired, placing a heat-shrinkable overlay around the tooth for covering the selected medium, heating the overlay to a temperature sufficient to cause shrinkage thereof and thereby operating on the medium. The overlay is subsequently removed to expose a repaired tooth requiring little or no additional post-cure finishing.

Abstract: A screening device for a melt of plastic material includes a housing provided with a throughflow boring forming a part of a high pressure plastic press. A screen plate is movable transversely across the boring and includes a series of screening openings arranged at the level of the throughflow boring and being separated one from each other by an narrow web. To minimize the formation of pressure gradients in the throughflow boring when a new screening opening is entering the boring, each web has at its interface with the housing a narrow overflow slot which sets up a gradual connection for an inflow current of the melt during the entry of a new evacuated opening into the region of the throughflow boring.

Abstract: A concrete block molding machine including: a gate-type frame constituting the body of the apparatus; a rail frame extending to right and left from the gate-type frame and; a pair of presses slidably mounted on the rail frame and adapted to move along the rail frame by the action of hydraulic cylinders in such a manner that when one of the presses is on a molding machine held by the gate-type frame, the other press is stationed at a position where a pressing member and a molding box of a changeable mold assembly are changed; and resilient clampers by which the molding box placed on the molding machine is attached to a vertically movable table device. In such an arranged construction, the mold changing operation can be carried out in a reduced time and complicated and laborious work is eliminated.

Abstract: A casting frame structure of a centrifugal casting machine. Comprising (a) a hollow rotary drum defining a concrete-slurry charging space therein and being integrally provided with a bottom plate on the rear end thereof, the rotary drum replaceably connected with a rotary plate driven by replaceably mounting the back plate to the rotary plate, the rotary drum having a feeder opening at the front end thereof through which a concrete slurry is supplied into the concrete-slurry charging space of the rotary drum, (b) a plurality of casting frames replaceably mounted on and along an inner wall of the rotary drum, (c) a plurality of casting frame positioning-and-fixing members arranged between the inner surface of said back plate of the rotary drum and axially outer surfaces of the casting frames for replaceably positioning and fixing the casting frames in place on the inner surface of the rotary drum.

Abstract: A molding device includes a mold core provided with a centering ring which is insertable on an inner centering ring attached to a core jarring machine. To clamp the centering rings one to the other, there is provided a hydraulic clamping device in the form of an elastic ring segment which is an integral part of one of the centering rings and adjoins a pressure chamber communicating with a source of hydraulic liquid. When pressure in the chamber is increased, the ring segment is elastically deformed and clamps the opposite ring.

Abstract: A continuously operable press for the manufacture of laminates and similar products has a heated press roll, two guide rolls, and at least one tensioning roll. One end of the rolls is journaled in bearings at a fixed support wall and the other end of each roll is removably journaled in bearings of a movable support wall. A pressure belt is passing over the rolls, but a decorating roll sleeve can be slid on and of from the press roll, and this provides a decoration on the adjacent laminate surface. The press has a device for lifting the relaxed pressure belt so as to remove the decorating roll sleeve. The lifter device has at least two transverse lift bars with suction heads, and the lift bars are distributed about the upper circumferential region of the press roll. Compressed air can be introduced between the press roll and the decorating roll sleeve when taking the decorating roll sleeve from the press roll.

Abstract: An arrangement for fitting a mold tool in an injection molding machine which has first and second mold tool mounting plates, comprises an array of lower support arms on each plate for supporting the mold tool in a precisely aligned position in respect of height relative to the plate, lateral guides for aligning the mold tool in a lateral direction, clamping elements for fixing the portions of the mold tool on the respective plates, and connecting means on the mold tool and the machine for the supply to the mold of power, blowing air, a tool temperature control agent and the like. Each array of arms provides a guide surface extending perpendicularly away from the plate on which they are disposed, while the lateral guide means have guide surfaces which converge towards the respective plate and towards the center line thereof. The tool is displaceable towards the respective plates on the respective guide surfaces of the arrays of arms, by movement of the plates one towards the other.

Abstract: A press apparatus for magnetic injection molding machines in which only the portion of a movable table in close contact with a lower metal mold is made ferromagnetic material and the other portion of the movable table is made of non-magnetic material, thereby fully utilizing the magnetic flux generated by magnetic coils with high efficiency and reducing the magnetic resistance of the magnetic circuit.

Abstract: The machine, which is adapted to be continuously fed with pasta filata, comprises:(a) a horizontal, circular table, having a first radial aperture adapted to be supplied with pasta filata and a second radial aperture for delivery of the product;(b) a shaft protruding vertically from the table center and driven by stepping motor means located beneath the table, and having an integral wheel provided with a peripheral rim;(c) a set of sector-shaped plates adapted to abut against said rim to form a full ring, each sector-shaped plate being slidably supported on the table and being provided with a plurality of radially aligned rows of vertical molding tubes opening at their bottoms through the plate and housing respective slidable pistons, so that each row of molding tubes will straddle a desired aperture of said first or second radial apertures for predetermined angular positions of said wheel;(d) fastening means for clamping said sector-shaped plates to said wheel rim;(e) water spraying means located above the s

Abstract: This relates to a blow molding machine of the type for blow molding large articles such as containers of the one gallon to five gallon size from a parison in the form of an extruded plastic material tube. The machine is of the rotary type and has a plurality of stations each carrying a mold unit of which one half is fixed and the other is mounted for radial movement between open and closed positions. The main shaft of the machine is of a large diameter and is tubular so that the necessary manifolding for gas and coolant supplies may be readily incorporated in the main shaft in an entirely different manner from that heretofore utilized. Also, among other features of the machine, is the provision of hollow spokes which serve not only to support outer mold halves for radial movement, but also serve as manifold accumulators for the necssary operating gases.

Abstract: A blow pin for molding machines includes first and second separate members juxtaposed adjacent to each other, with a replaceable cutting member positioned between the first and second members and with a shoulder-fastener arrangement associated with the blow tube for holding the first and second members together with the cutting member therebetween.

Abstract: Blow molding apparatus wherein halves of a split mold are carried by mold carriers. The mold carriers normally include one fixed mold carrier and one movable mold carrier which is positioned by way of a cam follower and associated cams. When the mold closes, the mold carriers come into closed relation with respect to one another. The mold carriers are provided with locking flanges which are engaged by C-shaped retaining members so as to prevent the material separation of the mold carriers. Then a pressure pack within the mold carriers is expanded so as to clamp the mold halves together. A simplified linkage is provided for, in conjunction with a cam follower and cams, to move the retaining members between retaining positions and release positions. The cams are mounted for adjustment normal to the direction of movement of the mold carriers and may be adjusted in that normal position to compensate for adjusted positions of the mold carriers in accordance with different size molds.

Abstract: A flowable substance is extruded from two coaxial telescoping cylindrical containers of which the outer is provided with openings on its periphery and is rotatable about the inner container. The substance is fed to the inner container and exits via a row of openings therein. As the outer container rotates, the inner and outer openings radially coincide cyclically whereby the substance falls in the form of drops onto a belt and solidifies. The row of openings of the inner container is provided in a nozzle bar which is removably attached to the periphery of a body part of the inner container.

Abstract: This relates to a blow molding apparatus of the rotary wheel type and particularly relates to supplying fluids, such as air, vacuum and water to a mold half and its associated carrier in a manner which permits the reciprocation of the mold half and associated carrier between a mold open position and a mold closed position. This is facilitated by the use of short lengths of hose which are attached to respective manifolds by swivels. The swivels permit the ends of the hose to change their angular relationship as one end of each hose moves relative to an opposite end of the hose. Adjacent ones of the hoses are located in adjacent parallel planes and are initially bowed in one direction and reverse their direction of bow as movable ends of the hoses move beyond fixed ends of the hoses. The carrier for the movable mold half has associated therewith a cam follower for engaging a cam which effects the opening and closing of the mold.

Abstract: For cooling, cleansing and/or lubricating purposes on a pressure casting machine 14 there is arranged an apparatus 10 for wetting mold surfaces 12 by spraying pressurized fluid thereon, which comprises a spraying head 40 provided with spraying nozzles 42 apt to be adjusted as regards direction, in which spraying head channels 44 and adjustable throttle valves 46 are disposed. To form such apparatus such that it is suited for the selective treatment of the different mold surfaces, no expensive adaptation operations being necessary with each change of mold and/or each re-use of such mold, that moreover a rapid automatic pressure casting operation is guaranteed and that high manufacturing and storage costs are avoided.

Abstract: A device for rapidly disassembling an extractor unit from the driving mechanism of a press for vulcanizing pneumatic tires is positioned on the lower part of the open vulcanizing mould, while the extractor unit comprises a body of a substantially annular shape apt to be fixed to a mobile shaft of the vulcanizing press through first connecting means comprising a first set of radial teeth obtained on said shaft and a second set of radial teeth obtained on said body and able to cooperate with said teeth of the first set to block the body with respect to the shaft in consequence of a rotation of the former with respect to the latter; the device comprises also dragging means including a disc which rotates in consequence of the action of a lever, hand operated, said disc is provided with a plurality of stakes whose axis is parallel to the axis of said body, said dragging means being able to cooperate with said extractor unit so that said stakes are inserted into holes of said body to make this latter rotate with re

Abstract: A mold housing support apparatus for supporting a mold housing having a mold cavity therein. A pair of laterally spaced elongate support members are secured at one end to a base structure which in the illustrated embodiment is a sector to a table. Each support member is cantilevered horizontally outwardly from the base structure and has an upwardly facing support surface coplanar with the other. An upstanding guide wall is also provided on each of the support members and is oriented so that the support surfaces are oriented therebetween and the guide walls diverge in a direction away from the base structure. A mold housing is mounted on a mold housing support plate with lateral edges that extend parallel to the guide walls on each of the support members. A toggle lever structure is provided for fixedly securing the mold housing support plate and, thence the mold housing to the base structure.

Abstract: A device for changing model plates is used in the manufacture of sand molds for foundry molding machines. The vertical axis of the lifting mechanism intersects both the longitudinal axis of the feed mechanism and the pivot field circle of the rotary conveyor for moving the model plates between lifting and molding sites. Model plates can be changed by the device without interrupting the molding machine cycle. Also, the model plates can be positioned outside the molding machine.

Abstract: A rotational moulding machine comprising a heat-insulated enclosure mounted to rotate on a frame about a substantially horizontal axis, which enclosure comprises means for receiving and driving in rotation at least one mould about an axis perpendicular to the axis of rotation of the enclosure, wherein said enclosure further comprises, inside, radiating elements located in front of the walls of the enclosure whose radiations are reflected by reflector means towards the central part of the enclosure where the mould is located in order to heat said mould by radiation.

Abstract: Apparatus is disclosed for making sheet-plastic articles, such as lids for disposable drinking cups, by vacuum forming. The invention provides spacers that fit into the holes in the stripper plate of the apparatus for the purpose of matching the size of the hole closely to that of the die impression. The spacers are flanged and in three segments, the segments being so arranged that two of the segments can be first placed in the hole, their flanges being entered into a groove in the hole, then the third is located in the hole and maneuvered radially outwards until its flange too is located in the groove. The segments are retained in place with a spring ring. The segmented spacers can easily be inserted at arm's length and by feel alone. The spacers are themselves radially thin so that the holes in the stripper plate can be packed tightly together.

Abstract: A blow molding apparatus comprising a wheel plate, a shaft extending horizontally and supporting the wheel plate for rotation and a hub removably mounted on the shaft for rotation with the shaft, and a plurality of sets of molds defining a mold cavity when closed, each set comprising a pair of mold sections, a first mold section of each set being mounted on the hub such that the mold sections are circumferentially spaced about the hub, a second mold section of each set being mounted on the wheel in circumferentially spaced relation and radial alignment with the first mentioned mold section. The second mold sections are mounted on slide assemblies for supporting the second mold sections for movement toward and away from the first mold sections. The hub has circumferentially spaced external surfaces for supporting the first mold sections, the number of surfaces corresponding to the number of first mold sections.

Abstract: An in-mold label dispenser (10) is disclosed for supplying labels to a multiple cavity blow molding machine (12) for an in-mold labeling process. Label dispenser (10) includes a dispensing head (24) mounted for movement between a withdrawn position free of the mold and an inserted position between mold sections in an open position of the mold. A plurality of label carriers (26) are mounted on the dispensing head (24) for movement between retracted and extended positions in order to receive labels (32) from magazines (28) and supply the labels to the mold. A drive mechanism (30) moves the dispensing head (24) and the label carriers (26) for the in-mold label dispensing. Preferably, the dispensing head (24) is mounted on a support (34) and is moved in a hesitating manner to receive labels. The dispensing head support (34) is preferably mounted on a frame (38) in a manner that conserves floor space and the frame is also mounted in order to permit access to the associated blow molding machine.

Abstract: A bottom plate retainer for a paste mold glassware making machine which includes a mounting block having a leaf spring mounted therein which urges a dowel member downwardly into engagement with a slot on the bottom plate.

Abstract: An article carrier is provided for blow molding equipment which permits relatively simple exchange of the article gripping chuck portion of the carrier. The carrier includes a carrier body, a spindle rotatably supported by the body, an article gripping chuck removeably attached to the spindle and seals between the chuck and the spindle and between the chuck and a preform retained thereby. The chuck is provided with article gripping levers preferably rotatably supported by ball and socket joints. The levers have preform grasping projections at one end and first and second ball ends at the other end. The first ball end mates with the chuck body socket and the second ball end is engaged by a lever actuating ring slidably mounted on the outside of the chuck body.

Abstract: Biaxially oriented tubular articles which are destined to provide bodies for processable food containers are made from an elongate tube of thermoplastics material as it emerges from an extruder.