Abstract: The method and apparatus for making a multi-layer plastic container with an integral handle for holding liquids and the like by enclosing a hollow parison of molten plastic which is at a blow molding temperature, pinching a portion of the hollow parison as the mold clses to form a hollow moil portion and neck portion, simultaneously pinching a portion of the hollow parison to form a hollow handle portion while leaving a portion of the parison to provide a passage from the moil poriton to the handle portion and the expanding the parison by supplying gaseous pressure to the moil portion and from the moil portion to form the container from the moil portion through the passage to form the handle.

Abstract: A process for preparing a laminar article with multiple thin, overlapping layers, includes preparing a melted heterogeneous blend of a polyolefin, an ethylene-vinyl alcohol copolymer, and a compatibilizer having a specified level of grafted cyclic anhydride groups; extending the body of the melt; and cooling the extended body to below the melting point of the polyolefin.

Abstract: The present invention is directed to a method and apparatus for extrusion blow molding polyethylene terephthalate articles. Articles produced according to this invention may be monolayer or multilayer; they may be circumferentially or biaxially oriented; and they may be heat set.

Abstract: A molding device for manufacturing a multiple layer product includes an extruder for extruding material to be molded, a blow head for receiving the material from the extruders and for supplying the material to a mold, and a passage connected with the extruder and divided into a plurality of branch passages connected with the blow head. An accumulator is provided on each of the branch passages, and a detector is provided in the accumulator for detecting the quantity of material introduced into the accumulator. A lock device locks the accumulator when the quantity of the material detected by the detector reaches a predetermined value, As a result a homogeneous layer can be obtained across the product.

Abstract: This relates to blow molded plastic containers wherein at least the body of such containers is of a laminated construction including, for example, a barrier layer which in the case of the container receiving carbonated products would be a gas barrier layer. It has been found that delamination does occur and this is now solved by selectively providing the container body with minute vent openings which do not extend entirely through the container body, but into that area where delamination occurs and there is an accumulation of a permeant, such as CO.sub.2. The minute vents may be formed in the exterior wall of the container either by way of piercing pins or by utilizing a laser. In the case of the piercing pins, there are incorporated in the blow mold for blow molding the container from a preform and are generally placed along the parting lines of the blow mold and also in central parts of the wall. The construction and operation of the piercing pins may be provided in several forms.

Abstract: This relates to an apparatus for applying labels to inner and outer mold halves of a Ferris wheel type blow molding machine. Most particularly, it relates to the substitution of extensible fluid motors for rotary motors wherein a saving of transverse dimensional spacing results, thereby permitting the two label transfer apparatuses to be in closer circumferentially adjacent relation and thereby permitting the proper timing of the applications of labels to relatively short blow molds. 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: In a process for producing a hollow body with a wall which partially comprises foamed thermoplastic material by an extrusion blow molding procedure, a preform which comprises at least first and second layers of which at least one comprises foamable plastics material is first extruded, the layer of foamable material is foamed, and then the preform is expanded in a blow molding mold by the application of an internal pressure. The hollow body may have a welded seam at a region of the hollow body at which an operation of squeezing off excess material has been carried out, the seam being in the form of an outwardly projecting flange web portion and the thickness thereof being such that the layer of foamable material is compressed at least to such an extent that it is not thicker than in the unfoamed condition.

Abstract: An extrusion molding equipment for a multi-layer parison which includes an operation position detecting device for detecting an operation position of an accumulator extruding an layer of resin material invisible from outside the parison. A pressure detecting device is provided for detecting pressure of the inner resin material in an inner resin conduit. An extrusion amount control device for the inner resin material is also provided for controlling an extrusion amount of the inner resin by the use of a signal indicating the operation position from the operation position detecting device, and a signal indicating the pressure from the pressure detecting device.

Abstract: Pipe made from thermoplastic polymeric material and comprising a transversely corrugated outer wall and a smooth inner wall of constant diameter fusion welded to the inner crests of the corrugations of the outer wall is produced by an improved method involving simultaneous extrusion of two tubes, blow molding of the outer wall and fusion of the two walls while the inner wall is supported by an internal shaping and cooling mandrel. Even when the polymeric material is polyvinyl chloride, good fusion welds and lack of brittleness are achieved by the manner in which extrusion is carried out, control of the location at which the fusion welds are established, and the extrusion formulation. The finished pipe is characterized by the fact that, when the fusion welded areas have been cut for inspection, no line of demarcation between the materials of the two walls can be observed.

Abstract: A molder for molding double-layered preforms in an injection, stretching and blow molding machine wherein a plurality of neck molds which also serve as a member for holding preforms and molded articles are mounted at given intervals on the undersurface of a transferring platen provided above a machine base and which is intermittently rotated so that the neck molds can be opened and closed, and devices required from injection molding of preforms to stretching and blow molding are disposed at stopping positions of said neck molds.

Abstract: Seamless, molded, thermoplastic articles having a laminar, multi-component composition with a heterogeneous blend of incompatible polymers--at least one as a matrix and at least one as a discontinuous phase, are manufactured by (1) heating the blend above the melting point of the highest melting polymer component, and (2) molding the melted blend to have a knit line curved through the thickness of the article resulting from such molding.

Abstract: A multilayered container comprising a wall portion consisting of thermoplastic gas barrier resin (resin B) layers and thermoplastic resin (resin A) layers, with the terminal portion of the mouth opening being of a thermoplastic resin (resin A), said wall portion being a multilayered structure formed by alternately laminating the resin A layers and the resin B layers in such a manner that there are at least two resin B layers, with the proviso that there is one more of the resin A layer than the number of the resin B layers, said structure having been biaxially oriented.

Abstract: Apparatus for unit cavity and multi-cavity, multi-layer injection molding and injection blow-molding machines are provided, which in preferred embodiments, include one or more co-injection nozzle means each having a central channel, at least two passageways having associated orifices which communicate with the central channel and valve means operative in the central channel and movable to block and unblock the orifices. The valve means preferably comprise an elongated sleeve having an axial central passageway and a port in its side wall and an elongated pin axially-reciprocable within the sleeve central passageway. The sleeve and pin are mounted in close tolerance slip fit relationship to prevent significant accumulation of polymer melt material therebetween.

Abstract: Apparatus for the in-mold labeling of a blow-molded, thermoplastic article wherein one or more labels are tangentially attached to the outer surface of an extruded parison at a predetermined location before the parison is expanded into a finished article.

Abstract: To provide hollow plastic bodies, e.g. bottles, with an inscription, a sheetlike object (23), e.g. a label, is pressed at least in part against an unfinished piece (26) while still being in deformable condition. This unfinished piece (26) is then brought, together with the preliminarily attached label into a blow mould (15). In blowing the bottle (26') the label (23) is strongly pressed against the bottle wall, because the label is held by the inner wall (31) of the blow mould.

Abstract: A method is disclosed for making a three layered parison for blow molding a biaxially oriented hollow article of thermoplastic material. One end portion of an extruded tubular body is heated to welding temperature and closed to a bottom by a forming step. The central layer of the multilayered body is removed from part of the end portion before the forming step takes place to insure that the central barrier layer of the body allows for an intimate welding together of the inner and outer layer. A similar operation is used in making the finish portion of a container at the opposite end of the tubular body.

Abstract: An injection molding apparatus includes a plasticizer (A) for plasticizing plastic pellets. An accumulator head (B) includes a plasticized material receiving entrance (40) for receiving the plasticized material. A mandrel (14) is disposed centrally within the outer body such that an annular cavity (12) is defined therebetween. A ram assembly (16) is mounted in the annular cavity for longitudinally reciprocating motion therein. Reciprocation of the ram assembly urges accumulated plasticized material through a downstream die (C). The ram assembly includes an outer ram member (30), an intermediate ram member (34), and an inner ram member (36). The ram members define a first passage array (60) between the intermediate and outer ram members and a second passage array (70) between the inner and intermediate ram members.

Abstract: Double walled thermoplastic tubes, with corrugated outer walls and smooth inner wall are formed with integral bell sections spaced along the tube. The outer, corrugated wall is formed with a bell section. One of the walls is pierced between the ends of the bell section to allow the escape of air, and the inner wall is pressed outwards into engagement with the bell section of the outer wall.

Abstract: Apparatus for making a rigid container by injection molding a parison having plural layers of polymers. The parison is blow molded to the final shape of the container. Control during injection is exercised over each of the plural polymers so as to produce uninterrupted layers extending throughout the walls of the parison and to insure that the interior layers are completely encapsulated within the outer layers.

Abstract: Long lengths of a heat-shrinkable sleeve for use in splicing electrical cables and the like are made in a continuous process. The sleeve is formed around a permeable core, and the core and sleeve are advanced together in an axial direction, the leading end of the advancing sleeve being hermetically sealed. The core and sleeve pass through a heating station, thereby heating a portion of at least the sleeve, and a fluid is introduced under pressure into the core, thereby internally pressurizing the sleeve to effect a radial expansion of the heated portion thereof. The core and sleeve then pass through a cooling station, thereby cooling the expanded sleeve to stabilize it. A stress graded compound also for use in splicing electrical cables and the like is made by heating a dimethyl silicone liquid to remove entrapped gas and mixing the liquid with a silicone carbide powder having a particle size capable of passing through a 400 mesh screen.

Abstract: A bottle made of a saturated polyester resin and having one or more strip-shaped projection for the reinforcement and ornament purposes is provided, which bottle is produced by a method comprising the steps of preparing a parison having an opened upper end and a closed bottom end from a saturated polyester resin, welding a strip-shaped piece made of the same saturated polyester resin on said parison so as to extend in the vertical direction, and then biaxially orientating said parison and said strip-shaped piece as an integral body.

Abstract: Layered thermoplastic articles and a method for forming layered thermoplastic articles are provided. The method involves forming a layered, thermoplastic parison, followed by blow molding the parison in a mold cavity to form a desired configuration of hollow article. The blow molded articles can be of any configuration achievable with known blow molding technology. Every section of the article can be layered, or the article can have selectively intermittent layered sections. The containers typically are used for storing and dispensing liquids and are of one-piece construction. In accordance with this invention, the thermoplastic materials are of a type which are incompatible.

Abstract: The invention discloses a method for injection molding a composite parison comprising the following first and second steps:a first step wherein neck molds mounted on a transport plate and a mold for a parison neck or an outer layer of the neck are brought together at a first molding station and molten resin is injected into a cavity formed in the neck mold to mold the outer layer of the neck of the parison, anda second step wherein said outer layer of the neck together with the neck molds are transported to a second molding station, the neck molds, the mold for the main parison portion and core molds are brought together at said second molding station while holding the outer layer of the neck to form continuous cavities extending over the inside of the outer layer of the neck, and molten resin different from the first mentioned molten resin is injected into said cavity to mold the main parison and at the same time mold an inner layer of a neck which is integral with said main parison portion and deposited wit

Abstract: A headpiece for a collapsible tube is a unitary member made up of two different plastics, each plastic providing a different property for the headpiece. The headpiece is formed by extruding on top of one another a first torus like annulus of a first plastic and a second torus like annulus of a second plastic. The two plastic annuli are simultaneously molded to form the headpiece. One plastic forms, primarily, the outer portion of the headpiece and the other plastic forms, primarily, the inner portion of the headpiece.The machine for molding the plastic head includes a work table rotatably indexed from station to station at which various operations are performed. The mandrel which holds the cylindrical body, to which the head is molded, is movable from an inboard position to an outboard position so that operations can be performed relative to it. The molding operation is performed at the inboard position. The loading, extruding, capping and ejection operations are performed at the outboard position.

Abstract: A multi-layered blown plastic container is formed by injection molding a first thermoplastic parison, axially stretching the first parison at its orientation temperature, injection molding a second thermoplastic parison around the first parison, and blowing the multi-layered parison at its orientation temperature to provide an oriented container, the inner layer being oriented in the axial and hoop directions, and the outer layer oriented in the hoop direction.

Abstract: Method and apparatus for the preparation of oriented hollow articles of moldable organic plastic material which is characterized by a rapid operating cycle and an inexpensive procedure. The disclosure teaches a streamlined operating cycle utilizing a reduced number of blow molds while retaining high productivity.

Abstract: A multi-layered blown plastic container is formed by injection molding a first thermoplastic parison, axially stretching the first parison at its orientation temperature, injection molding a second thermoplastic parison around the first parison, and blowing the multi-layered parison at its orientation temperature to provide an oriented container, the inner layer being oriented in the axial and hoop directions, and the outer layer oriented in the hoop direction.

Abstract: Apparatus for producing hollow plastic articles in a hollow die with a relatively smaller reciprocating punch therein. Plastic material is fed from a nozzle aligned with the die, into the die about the punch, the punch being initially advanced into the opening of the die and retracting as the plastic is introduced from the nozzle. When the plastic introduction is completed, then the nozzle is slid laterally on the die until the duct of the nozzle is out of registry with the die and the nozzle thus closes the die. Then the punch is advanced within the closed die to compress the plastic material into the space between the die and the punch.

Abstract: A method for applying prefabricated parts for reinforcing, supporting, forming, reshaping or labeling to articles blow molded from a thermoplastic material. A hot parison is blown in a mold into a preform having a shape slightly smaller than the finished article. The preform is then removed from its mold and the prefabricated part is attached to the preform. The preform is then blow molded to impart the finished shape to the article and to embed the prefabricated part into the article.

Abstract: An injection blow molder for manufacturing duplex hollow molded articles has four operation stages: An injection molding state, a heating stage, a stretching and blowing stage, and a mold releasing stage and has 1 neck molds more than the number of stages. The injection molding stage is expanded to include the stopping positions of two adjacent neck molds. In the injection molding stage, an inner parison and an outer parison are separately formed; and in the later stages they are stretched and blow molded to form a duplex hollow molded article.

Abstract: A process for forming a hollow multilayered thermoplastic article utilizing a liner and a core rod formed at least in part of a porous metal and having a blow slot. A vacuum is applied to the liner through the porous metal part of the core rod and optionally the blow slot and blowing pressure is applied through the blow slot.

Abstract: A blow slot equipped core rod assembly which incorporates a porous metal wall portion. Internal conduit means in the assembly permit a fluid (such as air, or the like) to be supplied to said blow slot (when open) and to such porous metal wall portion under superatmospheric or under subatmospheric pressure. The core rod is particularly useful in the manufacture of multilayered thermoplastic containers by injection blow molding procedures.

Abstract: Improved apparatus for forming multilayered thermoplastic articles employing a blow slot equipped, porous metal section equipped core rod. In addition to control means, the apparatus employs means for opening and closing the blow slot of the core rod, detachable connection means for connecting an internal fluid passageway in said core rod with a vacuum source, and other detachable connection means for connecting such internal fluid passageway with a pressurized fluid source. In addition, check valve means is provided for closing said internal fluid passageway when the internal fluid passageway is detached from the detachable connection means joining such with a vacuum source. The vacuum source is connectable with the core rod at the time of liner loading and the pressurized fluid source is connected with the core rod at the time of blow molding.

Abstract: A process for thermoforming laminated hollow articles including a plurality of processing steps wherein a thermoplastic material heated to a plastic state is selectively deposited area-wise on a sheet of thermoplastic material and such resulting laminate of thermoplastic materials is positioned proximate to a female mold of a thermoforming apparatus including preferably a plug assist for a subsequent forming of laminated hollow articles.

Abstract: Apparatus for the preparation of hollow plastic articles wherein a more rapid operating cycle is obtained with less effect upon the temperature of the parison. The apparatus includes a first core, means for providing a parison thereon, a temperature controlled first mold engageable with said first core and parison, means for separating the first core from the first mold and parison contained therein, a second core in spaced relationship to the first core, means for transferring the parison to the second core, a blow mold in spaced relationship to said first mold for fully expanding the parison and means for transferring the second core and parison to the blow mold, wherein the blow mold is stationary and the second core with parison thereon is brought into alignment with the blow mold and is inserted therein.

Abstract: Method and apparatus for the preparation of hollow plastic articles wherein an improved injection blow molding process is obtained and improved temperature control of the parison is obtained by the use of a plurality of molds and cores. At least one temperature controlled mold and core is used to adjust the temperature of the parison. The temperature adjusted parison is then stretched and/or blown in at least one second mold by a second core, cooled therein and transferred by at least one third ejector core to additional finishing molds for further cooling or to removal means.

Abstract: A method is disclosed for reinforcing bottles with a tubular netting embedded in an exterior surface of the bottle. A tubular netting section is initially compressed in an axial direction to increase its diameter. The compressed netting is positioned over a preformed parison of a thermoplastic material. The compressed netting is then released to re-expand axially and contract diametrically, until the netting contacts the parison. The parison is finally transferred to a blow mold and blown into a finished bottle. During the blowing operation, the netting is embedded into and reinforces the walls of the blown bottle. Depending upon the materials from which the netting and bottle are formed, the netting may also weld to the bottle wall to further increase the strength of the bottle.

Abstract: To produce a laminated container consisting mainly of thermoplastic materials, an outer container element consisting of material having desired barrier properties is first vacuum moulded from thin foil or film material in a vacuum mould, and thereafter an inner container element is blow moulded in the same mould with the outer container element present therein. To carry out this method, a mould is provided which consists mainly of two vacuum mould halves which are closable upon an intermediary plate in the vacuum moulding step and directly closable upon one another in the blow moulding step.

Abstract: A method for obtaining a multilayered, hollow plastic article having side walls which are oriented in the axial, radial and tangential directions. Plastic material is injection molded about a liner covered core to form a multilayered parison which is then transferred on the core to first and second blow molds for blow molding to a hollow article. A parison mold and core are maintained in axial alignment and the liner and blow molds are moved therebetween for engagement with the core.

Abstract: A multilayered hollow article is formed by first injection molding the outer layer parison on a core rod and then forming a clearance between this first parison and the core rod in a second mold, followed by injection molding the inner layer parison through the inside of the core rod to the outside of the core rod and into intimate contact with the outer layer, and subsequently blow molding the formed two-layered parison in a blow mold to obtain the final configuration. This method and apparatus are particularly suitable to forming multilayered containers wherein the innermost layer is a barrier thermoplastic, such as polyvinylidene chloride, and wherein the dimensional integrity of the innermost layer must be maintained.

Abstract: Method and apparatus for the preparation of oriented hollow objects of moldable organic plastic material by providing a parison on a first blow core, expanding said parison into an intermediate shape, as by pre-expanding it, transferring said pre-expanded parison to a second blow core, finally extending and expanding said parison to form said hollow object in finished shape.

Abstract: A filled, fluid barrier resistant plastic container is obtained wherein the container is exposed to a temperature in excess of 175.degree. F., as for example being filled with a material maintained at said elevated temperature. A multilayered, hollow plastic container is provided having outer and inner portions of thermoplastic materials resistant to temperatures in excess of 175.degree. F., and a barrier layer of thermoplastic material between the outer and inner portions. The container may be filled with a material at a temperature in excess of 175.degree. F. but below the temperature of resistance of the inner and outer layers whereby the barrier layer softens or melts, and the filled container is cooled to ambient temperature whereby the barrier layer reforms in place to provide the filled, barrier resistant container of the present invention.