Abstract: An apparatus for charging a press for making brakeshoes and the like utilizes an intermediate mold carrying precompacted powder positioned on the press mold. The powder is engaged by the raised press ram and a lowered ejection ram such that the powder trapped between the rams is transferred to the press mold. The intermediate mold is then removed, a counter-pressure plate swingably mounted on a frame of the apparatus is applied into registry with the press mold and the press operation ensues.

Abstract: A method for charging a press for making brakeshoes and the like utilizes an intermediate mold to carry the precompacted powder. The intermediate mold is positioned on the press mold and the powder engaged by the raised press ram and a lowered ejection ram so that the powder trapped between the rams is transferred to the press mold. The intermediate mold is then removed, a counterpressure plate is applied and the press operation ensues.

Abstract: A shaping apparatus for the production of fiber reinforced articles is disclosed. The shaping means includes a first screen having a surface defining the contoured shape of the article; a second screen having a complementary surface defining the reverse contoured shape of the article; and, at least one resilient presser rod operatively attached to the first screen or the second screen. The presser rod engages the fiber matting and presses the fiber matting into either a portion of the first screen or the second screen as the screens are closed together. The shaping apparatus is particularly suitable for the manufacture of glass fiber-reinforced automobile bumpers.

Abstract: An apparatus for the safe and efficient shaping of a heat-formable resilient material includes an upright male shaping member, a female molding member having a cavity adapted to matingly receive the upright male shaping member, a retractable hold-down knockout pin extending through the female molding cavity to a predetermined distance from the upright male shaping member when the pad-forming device is in the open position so that the resilient material can be inserted between the hold-down knockout pin and the upright male shaping member. The hold-down knockout pin moves away from the upright male shaping member to a retracted position when the pad-forming device is closed and advances towards the male shaping member to eject any shaped pads which might adhere to the female molding cavity while returning to the advanced position at a predetermined distance from the upright male shaping member.

Abstract: An adjustable clamp frame assembly for holding different sizes of plastic sheets in a thermo form machine. The frame assembly has longitudinal and transverse beams carrying clamp units that hold a plastic sheet on the beams. The longitudinal and transverse beams are movable along rails of a rectangular frame to change the lateral distance between both the longitudinal and transverse beams to accommodate different sizes of plastic sheets.

Abstract: In a process for producing hollow bodies of oriented thermoplastic material, a hollow blank having a bottom portion and a substantially cylindrical wall portion with an opening at its end remote from its bottom portion is subjected to pre-expansion in the region of the opening and then thermofixing in a subsequent treatment step. The thermofixing operation may be preceded by a mechanical expansion operation for orienting the plastic material forming the wall portion of the blank.

Abstract: A process and an apparatus for forming a flange on the wall portion of a hollow body of thermoplastic material with an opening at one end provides that the end part of the wall portion which defines the opening is heated and contracted by means of a force acting on the end portion from the outside thereof over the periphery thereof, whereupon the contracted end part is subjected to a pressing operation to form a flange extending around the contracted end part.

Abstract: A die-base ring (11) has at its upstream end a tubular ring (12) provided with a collar (12a) and co-operating with means for fixing the ring to a support (1). The fixing device includes four radial screws (19), pressing against a cylindrical bearing surface (13) of the support and making possible a mechanically operated off-centering of the ring relative to the support, and a clamping collar (20) making it possible to place two cylindrical bearing surfaces (14 and 15) in strictly coaxial positions. Axial screws (16) pass through the support with sufficient radial play to allow the adjustment.

Abstract: A device for aligning an elliptical blank relative to a female die half comprising a drawpad having an elliptical opening supporting a blank in position on a female die half. Alignment pins are movable rearwardly of the minor diameter of the blank within slots formed in the drawpad for engaging the perimeter of the blank for rotating the blank to the aligned position, in preparation for press forming the blank into the desired shape.

Abstract: An apparatus and method is provided for progressively converting each blank of sheet material in a stream of moving blanks into a clamshell assembly having interconnected lid and bottom portions. The apparatus includes a female die assembly having first and second mold cavities, an upstream control system for aligning one portion of each blank at a lid-pressing station defined by the first mold cavity, and a downstream control system for aligning a remaining portion of each blank at a bottom-pressing station defined by the second mold cavity. A male die assembly is provided for simultaneously forming a lid portion in one blank of sheet material and a bottom portion in an adjacent blank of sheet material. In particular, during each pressing cycle, the male die assembly simultaneously presses an initial blank at the bottom-pressing station and a succeeding blank at the lid-pressing station to produce the equivalent of a whole clamshell assembly on a single stroke of the male die assembly.

Abstract: A power press for manufacturing profiled bodies from a thermohardening bonding agent mixed with fibrous materials and utilizing at least two hot pressing steps, including an inner pressing tool part having a first surface, an outer pressing tool part having a second surface and engaging the inner pressing tool part wherein the first and second surfaces of the inner and outer pressing tool parts are shaped to correspond to the shape of the profiled body to be pressed, and a holding arrangement for holding the profiled body to be pressed fixed during at least two of the hot pressing steps so that the power press acts at the same place on the profiled body to be pressed during each one of the hot pressing steps and thus prevents damage to the profile body to be pressed caused by shrinkage occurring during at least one of the hot pressing steps.

Abstract: The present invention is directed to an apparatus for the production of back-foamed covers from cover materials and foam comprising(i) a mold comprising an upper mold half and a lower mold half, the lower mold half having a cavity therein, the inside surface of which is capable of being covered by the cover material,(ii) a mixhead associated with the mold, the mixhead capable of introducing foam materials and/or reactants into the mold cavity,(iii) a pusher bar arranged on a mount for pushing the cover material into the mold cavity and being arranged above the lower mold half, the pusher bar being constructed such that when the bar is pushing the cover material into the mold cavity, a gap is formed between the edge of the mold cavity and the edge of the pusher bar, the gap being less than the thickness of the cover material,(iv) the lower mold half being movable towards and/or away from the pusher bar, and(v) the surface of the pusher bar facing the mold cavity edge being a frictional surface.

Abstract: Upper and lower rollers have grooves for a bead ring having a clamp area portion produced by a bead winding machine. The bead ring is placed in the groove of the lower roller with the beginning of the clamp area portion in position for pressing by lowering of the upper roller so that the bead ring is engaged by the groove in the upper roller. The rollers are oscillated between the pressing position at the beginning of the clamp area and the end of the clamp area to roll the top, bottom and sides of the clamp area portion during the movement of the bead ring. The pressure on the bead ring is released by raising the upper roller at the initial pressing position at the beginning of the clamp area so that the bead ring may be removed with the same orientation it had when it was placed in the groove.

Abstract: Apparatus for forming accordion pleats in and about the sidewall of a thin-walled plastic container. Said apparatus comprising a forming station, a gripping and transporting means for introducing unpleated containers to the forming station and for removing the same from the forming station. Hot air means renders the containers malleable at the forming station. A plurality of circumaxially arranged forming plates move radially inwardly to engage the container sidewall and to form accordion pleats therein. Thereafter the plates are retracted radially for the introduction of the next succeeding container. A ring cam is intermittently rotated to operate the forming plates with the forming "dwell" regulated by a small cam.

Abstract: An optical glass forming apparatus for molding an optical element such as a lens by pressurizing optical glass, wherein a mold for molding one functional surface (optically functional surface) of the optical element is designed to be urged against the upper edge portion of a mold for forming the other functional surface of the optical element.

Abstract: There have been provided synthetic resin food containers and the method and device for moulding the containers.The container has a bottom wall, a side wall extending at an obtuse angle to the bottom wall and a rim or legs extending from the undersurface of the bottom wall.The device comprises a male mould including a main body, a bottom forming portion received in the main body for vertical movement relative to the main body and a pressurizing portion disposed for vertical movement relative to the bottom forming portion; and a female mould for receiving a portion of the bottom forming portion.The method comprises the steps of forcing said portion of the bottom forming portion into the female mould to form the bottom of the container, raising the bottom forming portion and substantially simultaneously move the pressurizing portion to form the rim or legs on the bottom of the container.

Abstract: Apparatus for forming plastic articles by a thermoform process. A plastic sheet to be formed is die cut to a predetermined shape, heated, and draped over a male mold extending vertically upward. A vacuum is drawn internally of the male mold forming an imprint in the sheet from a die carried on the outer uppermost surface of the mold. A mating female mold is then lowered about the male mold to press the sheet about the conforms of the outer surface of the male mold until the plastic sets, thereby forming the desired object.

Abstract: Method and apparatus for forming tooth positioners. The apparatus includes a pair of aligned model mounts which are relatively movable toward each other, a holding member between the mounts having a cavity for a positioner blank, a heating element embedded in the holding member, and a sandwiching pressure applicator. Preferred embodiments include a carrier member with which the holding member is removably engageable. The method includes heating the holding member by applying heat internally to it and applying sandwiching pressure to the blank, preferably concurrently.

Abstract: A method, machine and mold are provided for fabricating, by injection of synthetic material, containers having a film forming an external coating. The machine includes a mold, an injection nozzle, a film feed device, and means for holding the film against the male element of the mold; and wherein the injection nozzle is carried by the male element of the mold and said holding means comprise a slider in the cavity of the female element movable, under the action of the male element, against a return force.

Abstract: Apparatus for forming plastic articles by a thermoform process. A plastic sheet is supported between an upper female and lower male mold. The heater assembly is moved horizontally over the sheet which is heated and caused to conform to the lower molds shape when the upper mold is lowered thereabouts, thus forming the desired object. Vacuum means retain the formed object within the upper mold assembly during separation of the molds and deposits the formed object on the top of the heater assembly upon its repositioning over the lower mold to heat a subsequent sheet. The formed object is carried away from the molds on the top of the heater assembly upon subsequent horizontal retraction of the heater assembly from between the molds. An air jet from an orifice on the top surface of the heater assembly then propells the formed object onto a conveyor belt.

Abstract: The ear plug (40) includes an elongate body with a rounded tip portion and of an elastic material enveloped by a deep-drawn sheath (41) of thin flexible plastics film material. Rearwardly the plug preferably has a neck portion from which the sheath projects in the form of a stiffer collar or flange. Production of the ear plug includes deep-drawing a thermoplastic film or foil into a sheath with desired thickness distribution, and filling the sheath with elastic material (53). Filling may take place simultaneously with deep-drawing, the body of elastic material constituting a die for deep-drawing in a forming hole (45), or after the deep-drawing. In the latter case, an elastic die body is used to advantage, the shape of which generally corresponds to that of the finished plug, for deep-drawing in a forming hole suited to the die body.

Abstract: Apparatus for shaping the end portions of a reflective film to conform to a spherical shape comprising attaching the end portions of the film to flexible stretch blocks so the film wraps over a surface of the blocks which can be bent to arc positions matching the arc of curvature at the ends of the frame which carries the film in its final spherical configuration, and forcing the stretch blocks to flex about a neutral axis so the surface of the blocks which bend to match the arc of curvature at the ends of the frame move about fixed end points from a chord configuration to an arc configuration matching that of the ends of the frame thereby substantially uniformly stretching the film into its final spherical configuration.

Abstract: An apparatus for forming a paperboard receptacle includes male and female dies which draw the receptacle from a blank. The receptacle is moisturized during the drawing process to plasticize and lubricate the paperboard by injecting steam into one of the dies.

Abstract: An apparatus and method for producing articles by stretch-forming or pressure-forming of thermoplastics in the solid crystalline phase which permits forming from a billet of given thickness articles of greater wall thickness than would be formed by stretch-forming or pressure-forming the clamped billets.

Abstract: Apparatus and method for forming curved needlepoint canvases from initially flat perforated sheet by applying pressure to a first side of the sheet, thus driving and deforming it into an aperture in a die, and by supporting the opposite side of the sheet during deformation with a pressure pad which includes a recess into which the deformed sheet is driven.

Abstract: An apparatus is provided for thermoforming a plurality of protrusions in a plastic sheet. The thermoforming apparatus comprises a pneumatic press having a pair of male and female die plates with respective projections and cavities. One of the die plates is heated. The other die plate is cooled. The cooled die plate is provided with vacuum to ensure that the thermoformed plastic sheet is held against the cooled die plate upon the opening of the press to, in turn, ensure the cooling of the plastic sheet prior to its removal.

Abstract: Apparatus for the manufacture of articles from a thermoplastic of polyester or polyamide type, preferably of polyethylene terephthalate, the element consisting of an edge part which surrounds a body in an arrangement in which the latter is sunk relative to the edge part. The element is formed from a blank of mainly amorphous material or from a material having a crystallinity of less than 10%. The blank consists, for example, of a flat plate, a blank shell or the like. The body or parts thereof are shaped by stretching the blank until that material flows which is located within the material sections of the blank, which form the edge part in the element, the material stretched up to flowing in the body assuming a crystallinity of between 10% and 25%, while the crystallinity in the material in the edge part and in the unstretched parts retains its original value of less than 10%. At least the body of the element is expanded against warm mould walls until the final shape of the particular article is obtained.

Abstract: A press includes a frame, a flywheel, a motor for driving the flywheel, and a shaft. A clutch and brake assembly is provided which is actuable for engaging and disengaging the shaft to the flywheel. An eccentric is journaled upon the shaft and rotates therewith. The eccentric rotates in a block which is slidably mounted in a head to permit the block to move laterally within the head. The head is vertically movable in response to vertical movements of the block. The press also includes an upper die which is mounted on the head and a lower die which is resiliently supported upwardly on a base. Movement of the head engages and disengages the upper die and lower die. One embodiment of the press includes a second set of dies mounted to the head for cutting a continuous sheet of material into a predetermined shape.

Abstract: Apparatus for stretch-forming a heat softened sheet of thermoplastics material. The apparatus includes a stretching tool and means to move the stretching tool relative to means holding the sheet so as to stretch the sheet in a preselected direction with the tool. The stretching tool includes a plurality of blades having edges for pressing against the sheet to stretch the sheet and a cam to move the blades transversely away from each other to stretch the sheet transversely of the preselected direction as the tool is moved to stretch the sheet in the preselected directions.

Abstract: A machine for crimping tire bead rings in which an inner die member has grooves for holding the bead rings in the area of the bead splices and an upper die member engages the outer surface of the bead rings in that area. The die members are compressed with sufficient force for a sufficient period of time so that the strands of the bead rings are held together by the insulating material around the strands in the area of the bead splices. The side portions of the grooves control the spreading of the bead rings and may be flared to compress and then release the bead rings. The grooves of the inner die member may have movable inserts for ejecting the bead rings. The upper die member may also include grooves in mating engagement with the grooves of the inner die member for enclosing the outer portions of the bead rings at the splice area and provide for release of the bead rings after crimping.

Abstract: This relates to the thermoforming of can bodies for use in packaging beverages under pressure from polyester sheet material, preferably PET. In accordance with the invention, a forming gas is applied to the periphery of the clamped sheet portion in radially outwardly spaced relation with respect to an associated mold cavity and the sheet material is billowed up into a large cavity formed in the clamp so as to provide for high stretching and orientation of the peripheral portion of the sheet before the sheet is directed into an associated mold cavity. Further, a plunger which normally forces the billowed or initially stretched sheet into the mold cavity may be constructed so as to be radially expandible to thus positively radially expand the sheet material within the mold.

Abstract: A press includes a frame, a flywheel, a motor for driving the flywheel, and a shaft. A clutch is provided which is actuable for engaging the shaft to the flywheel. An eccentric is journaled upon the shaft and rotates therewith. The eccentric rotates in a block which is slidably mounted in a head to permit the block to move laterally within the head. The head is vertically movable in response to vertical movements of the block. The press also includes an upper die which is mounted on the head and a lower die which is resiliently supported upwardly on a base. Movement of the head engages and disengages the upper die and lower die.

Abstract: An apparatus used in combination with an input machine that continuously delivers a stretchable web to an input location and with an output machine that operates stepwise to treat the web at a stationary output location has a reciprocal support frame between the locations and displaceable in an upstream direction toward the upstream location and a downstream direction toward the downstream location. Longitudinal and transverse stretchers are carried on the frame and have web-engaging elements displaceable relative to the frame in the downstream direction for stretching the web and holding the web in stretched condition. A storing or tempering stage between the frame and the upstream location supports a loop of the web so that as the frame moves back and forth this loops grows and diminishes. A drive connected to the stretchers continuously advances the web in the downstream direction relative to the frame at a web-travel rate.

Abstract: A method and an apparatus for manufacturing the socket portion of a plastics pipe provided with a sealing ring by pushing said sealing ring on a mandrel and by locking it thereto whereupon the heated end of said plastics pipe is pushed onto said mandrel and said sealing ring. Hereafter, the locking of said sealing ring is released, and the pipe and the ring therein a removed from the mandrel.In order to facilitate this removal operation, a mandrel having an adjustable diameter is used, the mantle surface of said mandrel being provided with peripheral grooves into which shoulders in said sealing ring fit for locking said ring to said mandrel for the duration of the socket forming.

Abstract: A shape-preserving device which is attached to the top and bottom mold section of a thermoforming machine which reciprocatingly thermoforms articles from a heat-softened plastic sheet. The device includes a cavity mold attached to one mold section and a remolding shoe assembly attached to the other. The remolding shoe assembly includes a floating remolding shoe attached to the outer end of a piston rod connected to a pressurized fluid-actuated pneumatic cylinder which is in unimpeded flow communication with a source of compressed air.

Abstract: Apparatus for removably attaching inserts to articles by means of shrinkable plastic bands, comprising in combination:(1) means for feeding an opened band of shrinkable plastic film into vertical alignment with an article banding station,(2) means for (a) shaping an insert into generally cylindrical form, such that the diameter of said cylindrical shaped insert is less than the diameter of said opened plastic band, but greater than the article over which the insert is to be placed, and (b) feeding said cylindrical shaped insert into vertical alignment with said opened band at said article banding station, said means comprising: (i) a movable plate provided with at least one cylindrical aperture extending through said plate, said aperture communicating on its peripheral side with a slot extending to the edge of said plate and (ii) means for feeding said insert into said aperture and for conforming said insert to the cylindrical inner surface of said aperture,(3) means for telescopingly pushing said opened band

Abstract: Apparatus for splicing ends of a sheave insert material in which the ends of a premeasured length of an elastic, thermoset sheave insert material are laminated together in a special splicing jig for fabricating a unitized insert loop, which is subsequently stretched around a sheave into a preformed insert receiving slot along the circumference thereof. The jig holds the ends of the premeasured length of insert material in alignment as a heated mold, included therein, fits snugly around the ends and applies heat to the joint therebetween, into which the insert material, in liquid form, has been inserted to join the ends. The heat thus applied to the joint accelerates the curing of the liquid into the same consistency as the insert; thereby producing a unitized bond between the ends by which the unitized loop is thus formed.

Abstract: Apparatus for molding material including a frame for holding the material and which is movable away from the molding die so that the material can be loaded and unloaded into and out of the frame at positions clear of the die. The frame has spring biased movable mountings having pins which penetrate the material and hold this in a resilient manner during molding. A turntable support is provided for holding two of the frames on opposite sides of a vertical axis, and this holds one frame in a convenient loading position while the other frame is holding material being molded.

Abstract: Apparatus for manufacturing the cups of a brassiere from a fabric of synthetic material, said apparatus consisting of a frame with members for stretching and/or clamping and/or transporting the fabric between a mould which may be moved up and down, and a supporting rim cooperating with said mould and mounted therebelow, while further means are present to separate the cups, formed by the mould, from the remaining fabric.

Abstract: In a thermoforming machine for forming products from plastic sheets or the like, two shuttles or sheet-carrying frames shuttle interchangeably between a feeding station and a forming and loading station, with the shuttle which carries the sagging heated sheet passing under the oppositely moving shuttle. At opposite ends of a transverse axis at the longitudinal center of each shuttle, pivotal connections are provided to vertically looped drive chains so that the shuttle can remain right-side up as it follows the looped path of its chains. Rails are provided which support the shuttles and maintain them horizontal as they move. At the forming and loading station, snorkels engage the shuttle stopped there to provide suitable air pressure and discharge connections for operating sheet clamps by double-acting cylinders. The snorkels thrust the shuttle rearwardly against a ratchet, for accurate stop-positioning between snug side-cams.

Abstract: With the view to obviating or mitigating the disadvantages that in processes for the production of containers, for example, product-filled containers, in which processes a substantial proportion of scrap is produced and that the space occupied by a plurality of the containers prior to the product-filling thereof is considerable even if the containers are disposed in stacked relationship, there is provided a process for manufacturing a rimmed container preparatory to the filling and closing thereof from a one piece homogeneous blank, composed entirely of heat formable material containing just the requisite amount of material for forming the rimmed container to be filled, filling rim and an apparatus for performing the process, wherein the process includes the steps of uniformly heating a substantially rigid planar preshaped homogeneous blank of thermo plastic material, out to at least immediately adjacent the portion thereof adapted to form the container rim to a formable state while leaving the outermost peri