Abstract: An integral hinged blow molded container having a single wall is produced by inflating a parison within a mold having a hinge forming area with a draw ratio of greater than 1 whereby the parison is reduced to thickness within the hinge forming area relative to the adjacent area. The thus formed parison is severed about a circumference adjacent the formed hinge to create a top portion and a bottom portion openable and closable about the hinge.

Abstract: An integral hinged blow molded container having a single wall is produced by inflating a parison within a mold having a hinge forming area with a draw ratio of greater than 1 whereby the parison is reduced in thickness within the hinge forming area relative to the adjacent area. The thus formed parison is severed about a circumference adjacent the formed hinge to create a top portion and a bottom portion openable and closable about the hinge.

Abstract: A blow molding machine for forming a chain of hollow, shaped article bodies of a normally highly crystalline thermoplastic material which is biaxially oriented, from a continuous tube of the material in substantially unoriented condition, but at its orientation temperature, which includes a tube and chain transporter for pulling the tube from a first point to a second point, and for pushing beyond the second point that portion of the chain formed between the two points; a tube brake to brake the travel of the tube past the first point during at least part of the time it is being pulled, whereby the part of the tube between the points becomes longitudinally stretched; and stationary blow molding means including a plurality of stationary blow molds between the first point and the second point, each having corresponding mold pieces closable on the stretched part of the tube, and openable after formation of the hollow body in the cavity defined by the closed mold pieces, and means for inflating the portion of the

Abstract: A tire vulcanizing press which is constructed such that a die assembly is tightly closed by means of a press cylinder with a raising and lowering table disposed therebetween. A spacer is displaceably disposed between the press cylinder and the raising and lowering table so that a predetermined die closing force is transmitted from the press cylinder to the die assembly via the spacer and the raising and lowering table when the die assembly is tightly closed.

Abstract: A method is disclosed for reducing post-molding shrinkage of a hollow oriented polyethylene terephthalate container; the method including the steps of:(1) bringing a polyethylene terephthalate parison to orientation temperature,(2) blow molding the parison to provide a biaxially oriented container with larger dimensions than desired in the final container,(3) heating the blow molded container for a time and temperature sufficient to shrink the container to the desired size whereby substantially all the time-temperature dependent shrinkage is accomplished.

Abstract: The number of blow mold stations being associated with a blow wheel of a blow molding machine determines a large pitch of the mandrel receiving positions of the blow wheel. Contrarily the mandrels carrying the parisons are disposed very close to each other on the heating wheel which thus has a substantially smaller pitch. The larger pitch of the blow wheel shall be maintained throughout the complete machine to simplify the transfer of the parison. Accordingly the heating wheel receives the same pitch as the blow wheel including additional mandrel receiving positions which are served in a plurality of subsequent revolutions of the heating wheel.

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: This relates to a label applicator for applying labels to mold cavities of rotating mold units. The label applicator is fixed relative to moving mold units and includes an extensible fluid motor which carries a pick-up head or suction head for moving the suction head in a straight line direction and return. The extensible fluid motor is carried by a shaft for oscillation between a label pick-up position and a label deposit position. The extensible fluid motor is carried by a bracket which, in turn, is carried by a shaft of a rotary actuator which is constructed to oscillate between two fixed positions which are spaced apart a preselected angular distance. There is incorporated with the rotary actuator a decelerator for rapidly, yet smoothly, decelerating rotation of the bracket carrying the extensible fluid motor. Suitable sensor means are provided for timing the actuation of the label applicator in accordance with the position of a mold cavity into which a label is to be placed.

Abstract: An in-mold label dispenser (22) for a blow molding machine is disclosed as including a dispensing head (56) mounted for rectilinear movement along a first axis A between a label magazine (48) and an open mold (28) and having a label carrier (58) mounted on the dispensing head for rectilinear movement between retracted and extended positions along a second axis B transverse to the first axis A. Rectilinear movement of the dispensing head (56) along the first axis A and coordinated extending and retracting rectilinear movement of the label carrier (58) along axis B transfers a label (50) from the magazine (48) to the mold (28) in preparation for the blow molding operation. The label dispenser (22) has particular utility when provided with a pair of the label carriers (58) to simultaneously transfer a pair of labels (50) to the open mold (28) within the confined space limitations involved.

Abstract: Apparatus for manufacturing articles is disclosed in which a preheated sheet of thermoplastic material is intermittently fed to present successive preheated portions of the sheet in a work station having a forming tool for forming articles in each successive sheet portion and a stamping tool for co-operating with the forming tool to stamp the formed articles from the sheet. The forming tool has a plurality of forming dies which are movable successively and cyclically into the work station for forming articles in respective successive sheet portions. After each forming operation the stamping tool is brought into engagement with a resilient counter-surface on the forming die to stamp from the sheet the articles formed by that die.

Abstract: A blow molding method for forming a chain of hollow, shaped article bodies of biaxially oriented, normally highly crystalline thermoplastic material from a tube of the material in substantially unoriented condition, but at its orientation temperature, which includes pulling the tube from a first point to a second point, and pushing beyond the second point that portion of the chain formed between the two points; braking the travel of the tube past the first point during at least part of the time it is being pulled, whereby the part of the tube between the points becomes stretched; closing the corresponding mold pieces of a plurality of stationary blow molds on the stretched part of the tube; inflating the portions of the stretched part of the tube within the mold cavities defined by the corresponding mold pieces to form in each the mold cavity one of the bodies, and to biaxially orient the material thereof; and sequentially opening the mold pieces, following the inflating, to minimize snap-back of the chain.

Abstract: A method of strengthening the neck portion of a hollow blow-molded bottle-shaped container of a biaxially oriented polyethylene terephthalate resin, which has the steps of heating the neck portion from 140.degree. to 170.degree. C., inserting a die pin of a predetermined shape into the opening of the neck portion, blowing cooling air to the neck portion, thereby shrinking and whitening the neck portion. Thus, the method prevents improper shrinkage deformation of the neck portion due to the thermal influence of the bottle-shaped container.

Abstract: A tire table is disclosed for supporting a pneumatic tire during recapping of same. A structure defining an annular steam chamber is removably positionable on the tire table so as to apply heat to an extensive area or areas of a tire sidewall during the repair of same. A circular plate structure of the tire table is equipped with a steam receptacle for applying heat to localized areas of the sidewall being repaired. A rim assembly is engageable with the damaged beads of a tire being recapped and includes annular wall structures for the flow of steam for heating the tire bead or beads during repair of same. A tire recapping mold of conventional design is also disclosed.

Abstract: A method and apparatus are disclosed for holding and feeding a continuous sheet (12) of plastic in an operation such as thermoforming. Articulations (13), such as alternating waveforms, are formed on the edges of the plastic sheet (12) by heating and pressing the edges, producing inwardly facing abutment surface at the edges of the sheet. The sheet is then passed into slots (34) in guide rails (32) with the inside surfaces (35) of the guide rails (32) engaging the abutment surfaces on the plastic sheet (12) to prevent the sheet from slipping out of the guide rails. The plastic sheet is thereby held firmly so that it can be passed through such thermoforming operations as heating in an oven (14), forming with a mold at a forming station (40), and cutting the formed articles away from the remainder of the sheet by a trim press (53).

Abstract: In extrusion blowing a hollow member, a preform is extruded and then blown in a mold to produce the final member. The weight of the hollow member is determined after its removal from the mold and compared to a reference value, thereby to adjust the size of the extrusion discharge opening to control the amount of material in the preform. The length of the preform is detected to control the movement of the mold thereby to keep a substantially constant length of extruded preform, while the time required to produce a preform is also maintained at a substantially constant value.

Abstract: A technique is described for preparing molecular biaxially oriented hollow articles from thermoplastic materials. The invention involves forming a parison on a cooled core rod by injecting a hot thermoplastic material into a cavity formed by the core rod and a cooled injection mold, cooling the parison with low temperature coolant to a temperature within the orientation range of the thermoplastic material, transferring the parison to a stretch blow molding position and permitting the temperature of the parison to equilibrate itself. The parison is then stretched, oriented to yield the desired biaxially oriented article, cooled and ejected.

Abstract: A method for the fabrication of a plastic preform suitable for use in the preparation of biaxially oriented hollow articles is described wherein the duration of the preform injection molding cycle is reduced, thereby enhancing the productivity of the injection molding step. This end is attained by injection molding and cooling, and supercooling and conditioning simultaneously at a single station of an injection molding machine at different positions within the station.

Abstract: The instant invention is directed to a method for producing hollow articles which are open toward the axis, are rotationally symmetrical and symmetrical with respect to a central plane produced from polyurethane multi-component reaction materials by the reaction casting method, a mold core being required during production for generating the cavity in the article, and the reaction mixture being supplied from the rotational axis via feed channels to a mold cavity, comprising: supplying a reaction mixture alternately to each side of the mold cavity, the article thus being built up symmetrically with respect to the rotational axis.

Abstract: This relates to a loader for loading preforms into collets of pallets in a blow molding machine wherein a plurality of preforms are simultaneously loaded into the blow molding molds during each operation of the machine. The loader includes a preform supply wherein there is a preform receptacle having a number of preform pockets corresponding to the number of preforms to be loaded in a pallet. A preform carrier is moved between a position underlying the preform receptable for receiving preforms therefrom to a position underlying a pallet presented to the loading station. The preform positioning device then engages the bottoms of preforms and moves the preforms up through the preform carrier into the lower end of the collets of pallets where they are automatically retained in place by spring loaded detents. This abstract forms no part of the specification of this application and is not to be construed as limiting the claims of the application.

Abstract: A method of, and apparatus for, forming thin-walled synthetic plastic containers and like articles wherein areas are stretched out of the plane of heated thermoplastic material a portion of the axial length of the containers or articles to be formed to form top and bottom preforms, each with an open and a closed end; each preform, while still in the webs, is further axially and radially stretched, at a temperature conducive to orientation of the molecular and crystalline structure of the material, to a greater length still less than the axial length of the container or article to be formed; the preforms are severed from the webs to provide open ended top and bottom sections; and the open ends of pairs of top and bottom preforms are assembled and welded together to form the containers or articles.