Abstract: In a system for manufacturing containers by blow-molding or drawing/blow molding of previously heated preforms, sterile containers (110) are obtained by wetting (45) the preforms (3) using an appropriated heat-activated sterilizing product by activating the product by heating means (100) which also provide a suitable heating profile to the preforms to prepare them for blowing.

Abstract: A molding method and a mold therefor capable of forming a doll head of a shape exactly conforming to a mold by blow molding using a safe molding material. A split mold (2, 3) which has an inner surface formed to have a configuration conforming to a shape of a doll head (17) is so arranged that a parting line (18) formed by mold members (2, 3) of the split mold may be formed on a hairline of the hair of the doll head (17) or in proximity thereto. A molding material is constituted by a thermoplastic synthetic resin elastomer as a main ingredient thereof and has a plasticizer and a coloring agent added thereto. The molding material is heated and then dropped in as a parison (15) between the mold members (2, 3) of the split mold spaced from each other. Then, the mold members (2, 3) of the split mold are joined together and air is blown into the split mold. Air is removed through at least one projection such as a nose (5) or the like from a cavity during blowing of air into the split mold (2, 3).

Abstract: A plastic product, and method and device for producing such plastic products are disclosed. The present invention produces a plastic product having a completely sealed sidewall defining at least one cavity therein, or a plastic product filled with a filler, such as urethane foam, in the cavity, or a plastic product having both a sidewall with both open end portions and a filler contained in the cavity. The plastic forming process and device of this invention effectively produces a variety of plastic products, such as a variety of panels, pipes, channels, columns, boats, oil tanks, door panels, vehicle door panels, bumpers, vehicle hoods, and small-sized submarines, which are not produced by conventional plastic forming processes or devices.

Abstract: A method for fabricating synthetic-material molded parts through extrusion blow molding, produces sharp-edged, strong contours and/or undercuts in the region of break-throughs. A synthetic-material tube introduced into the blow-molding die is initially widened by pneumatic pressure, shaped and held on smooth or slightly contoured surfaces of the blow-molding die. However, strong, sharp-edged contours are shaped by mechanical pressure exercised on an outer surface of the synthetic-material tube by a shaping tool. A device for carrying out the process has a blow-molding die with a wall in which shaping slides are guided in one or more parts that can be guided in the interior of the blow-molding die and have sliding parts which can be driven independently of each other or in synchronism.

Abstract: A blow-molded plastic container and reinforced lid are simultaneously produced in a blow mold. A lid is reinforced by having a portion of the lid formed by blow molding techniques and another portion of the lid formed by compression molding techniques. The container and lid combination, a method for making the combination and apparatus for making the combination are provided.

Abstract: The present invention provides a wholly blow molded light weight bumper system which provides a double walled vertical blow rib for mounting the bumper to a vehicle and a method for making the same. A first surface projects from one of the molds and is perpendicular to the first and second mold halves. In association with the first surface a second surface is movable between a retracted position and an extended position. To create the vertical rib the second surface is moved from the retracted position to the extended position. The second surface thereby pinching the inflated thermoplastic material between the first surface creating a double walled vertical rib substantially perpendicular to the parting line.

Abstract: A limited pour neck finish bottle wherein a plurality of radially inwardly extending flexible fingers are integral with the peripheral edge portion of the open end of the neck of a bottle and extend across the open end of the neck to restrict or interfere with the flow of liquid from the bottle if an attempt is made to pour the liquid from the bottle rather than employing an exact dose dispensing device. The bottle is made by molding a plurality of axially extending flexible fingers on the peripheral edge portion at the open end of the neck simultaneously with the molding of the bottle, and then bending the fingers downwardly to the radially inwardly extending position.

Abstract: The invention relates to blow molding of an article having an inwardly projecting hollow boss with a closed end. A portion of a molten parison conforms to the shape of a fixed pin projecting from the face of a mold part to thereby form the hollow boss. The invention includes an apparatus comprising a reciprocable sleeve slidably received within the mold part over the pin. It has been found that by blow molding the parison with the sleeve initially extended with its end substantially flush with the end of the pin, followed by retracting the sleeve to a retracted position after a predetermined delay time, a boss with a thicker end results. Consequently, the boss end has greater structural integrity, and thus minimizes or eliminates the possibility of penetration and/or cracking of the boss end when a screw is threadedly received in the hollow boss.

Abstract: A container is made in two stages from thermoplastics material. In the first stage a preform (1) is injection moulded, the mould parts easily releasing a tubular body (2) with a closed end and an outwardly projecting rim (3) at the open end. In the second stage the still heated preform (1) is blow moulded, possibly with some preliminary mechanical stretching, with the blow pin (13) seated in the open end of the body (2) and the preform (1) held by the outer part (7) of its rim. The wall of the body (2) is expanded, and immediately below the open end it is stretched outwardly to meld with the underside of the inner part (5) of the rim. The resultant container thus has a mouth defined by an inset lip. It may be of paint tin form, with a drip groove (9) around the mouth.

Abstract: A machine and method for blow molding a polyester bottle for carbonated beverages with an internal web structure positioned between two hand-grip depressions. The machine and method uses an injection-molded preform having a web feature and maintains the web of the preform in a precise position during heat-treatment and eventual blow molding into the bottle. Heat-treatment involves an oven capable of heating and cooling selected regions of the preform by using a combination of shields, heat energy reflective surfaces, and cooling airflows. Bottle blow molding involves precise placement of the preform relative to hand-grip surfaces in a blow mold cavity and cooling airflow of the internal web structure before bottle removal.

Abstract: The method of manufacturing an explainable element for use as a support body of a piece of furniture or a part thereof, a mattress, a cushion or the like. The element was a thin wall of a soft, flexible polymeric material, by blow moulding in an essentially closed form. During the blow-moulding process at least one portion of the wall of the element is pressed inwardly to a position where it is brought to permanently adhere to another portion of the wall of the element or another portion of the wall which is pressed inwardly.

Abstract: A method for manufacturing a container. The method includes the steps of providing main body dies, passive dies, active dies and a supporting column, followed by providing a semi-solidified flexible material in a considerably solvent state in the form of a tubular blank that is positioned and squeezed on the supporting column. The dies are opened and closed so that the active dies will squeeze the blank against the supporting column. Air is blown into the blank to enable the blank to adhere onto a cavity-shaped wall that is surrounded by the main body dies, the passive dies and the active dies. Air blown into the blank is released and the active dies initiate a first movement upwardly in synchronization with the supporting column. The active dies link-up with the passive dies to conduct a second movement upwardly to enable the active dies to drive the blank to deform.

Abstract: A tool with a blade is provided at a molding die and set so as to protrude further inwardly than the molding surface of the molding die. When a parison is expanded within the molding dies, the parison is brought into close contact with the outer peripheral wall of the tool. A hollow body is formed in a state in which the inner wall surface of a through-hole is molded by the outer peripheral wall of the tool. Thereafter, the tool is advanced and a cut-out piece is excised. A washer tank is thereby formed. The inner wall surface of the through-hole is not a cut surface and the through-hole is formed in accordance with the outer peripheral wall of the tool.

Abstract: A method of manufacturing a blow-molded hinge assembly includes blow-molding a first member having a first body. The first body is made from two layers of plastic parison that are molded to form a generally solid plastic T-shaped tongue portion having barrel protrusions. A second member having a second body is also blow-molded. The second body has a recessed portion integrally formed therein. The recessed portion has opposed keyways receiving the barrel protrusions. The recessed portion has slots receiving the T-shaped tongue portion. The second member is formed by blow-molding the recessed portion around a T-shaped slide. The slide has a rounded portion that forms the keyways and a flat portion that forms the slots. After blow-molding the second member, the slide is removed from the recessed portion.

Abstract: A process for the production of a container (1) comprising an outer container (2), an inner bag (3) disposed therein and a pressure equalization opening (10) disposed in the outer container (2), and also a container (1) produced according to this process, is described, wherein firstly a pre-molding, comprising two coaxial tubes, is first produced by co-extrusion with the help of a blow mold and with an outwardly-projecting base seam (5) being formed. The process is to form a pressure equalization opening (10) in the outer container (2) of the container (1) without endangering the integrity of the container (1), wherein a lower wastage rate and higher productivity are to be achieved. This is attained by a process wherein the base seam (5) is partially cut off and a force which acts in the direction of the seam is introduced into the pre-molding, which still has a temperature of 40° C. to 70° C.

Abstract: Methods of thermal annealing of plastic pieces immediately after hot melt forming are disclosed to accelerate the time required to achieve dimensional stability. The present methods include the essential steps of: (A) forming molten plastic into molded plastic pieces and rapidly cooling to below the melting point of the plastic in a mold to form shaped cooled plastic pieces; (B) immediately thereafter, heating the plastic pieces to a temperature of about 150° to 170° F. (65.5° to 80° C.) to form heated plastic pieces; and, thereafter, (C) cooling the heated plastic pieces to room temperature to form thermally annealed plastic pieces. Tn its product aspect, the present invention resides in physically aged thermoplastic pieces having reduced rates of age shrinkage.

Abstract: A wide-mouth, hot-fill plastic container having pinch-grips and a high push-up base and method for forming the same. According to the method, a preform is positioned in a mold cavity defined in part by surfaces which deviate substantially inward to form pinch-grips in the resulting container. Initially, a mold base is located so that it defines an initial mold cavity whose length is greater than the final length of the container. The preform is axially stretched in the cavity to a length greater than the containers final length. After stretching the preform, the preform is generally expanded radially outward under low pressure. The mold bottom is then moved to a position where the length of the cavity is about the same as the final length of the container. The preform is further expanded under high pressure such that it contacts the molding halves thereby forming the finished container.

Abstract: A method and apparatus is provided to transport parisons from the extrusion die to a second location. The parison is extruded and a collar means is provided to contact the parison near its upper end and create a holding geometry whereby the parison is retained by the collar means without pinching the parison. The parison is then transported vertically or horizontally to the mold unit without closing or pinching the parison. The holding geometry is created by slightly deforming the parison wall near the collar means. The parison is therefore transported to the second location, for example a mold unit, instead of moving the mold unit, to the parison.

Abstract: A method and a device for manufacturing secondary mold elements such as necks, protrusions, raised elongate flat locations and the like on elongate, circumferentially closed hollow shapes by means of internal-high-pressure shaping. The secondary mold element is shaped locally by widening of the hollow shape using a high-pressure fluid therein, and is supported under control during the shaping process by a counter plunger that expands outward with increasing shaping. In order to expand the method limits during the manufacture of a secondary mold element for an increase in its height in a safe and simple manner, the hollow section is upset inward by the counter plunger at the point where the secondary mold element is to be produced, whereupon the hollow shape material in the vicinity of the inward upsetting point is pressed circumferentially and endwise by the high-pressure fluid and the plunger.

Abstract: A device and method is provided for manufacturing at least two curved, joined tubes. The method includes extruding, without clamping, a blank in a modifiable-geometry mold cavity and placing the blank in the cavity by means of an entraining air stream, and then modifying the geometry of the mold cavity to clamp the blank and injecting a gas to shape the blank to the mold cavity geometry thus modified to obtain at least two curved, joined tubes. The device includes a mold cavity and at least one moving part for modifying a geometry of the mold cavity. The moving part is displaceable between a retracted position in which a blank can be placed in the mold cavity under the action of an air stream and a blank clamping position to allow formation of at least two curved, joined tubes upon blowing.

Abstract: A biaxially stretched blow molded bottle of a synthetic resin having a big foot type petaloid bottom is produced in a blow time of not more than 3 seconds, and after the bottle has been released from the mold, the temperature of the bottom portion of the bottom does not rise higher than 70.degree. C., thereby supplementing the capability of the metal mold for cooling the bottom portion. Thus, irregular deformation of the central part of the bottom portion is prevented, molding of the bottom portion with high pressure resisting and mechanical strength is achieved to avoid breakage, and a sufficient height of the central part of the bottom portion is ensured. Additionally, productivity of pressure resisting bottles is improved by reducing the blow time from 4-5 seconds to not more than 3 seconds.

Abstract: A method and apparatus for blow molding articles having a circumferential sidewall terminating in a closed top in which at least one preformed solid hoop is partially fused to the circumferential wall of the article and projecting axially above at least a portion of said top end. The entire outer peripheral edge portion of each reinforcing hoop is concentrically placed underneath the extrusion head with a suitable fitting. Thereafter, a tube of soft thermoplastic material is extruded through the totally open central portion of the hoops until the end of the tube overlies the pneumatic nozzles. Each mold half consists of a center sections and intermediate sections that are relatively movable in a direction lengthwise of the mold to enable both engaging the hoops and loosening the blow molded article of the mold. End mold sections slide on an incline to fully close the mold. The semi-cylindrical mold central halves close to radially position the hoops and form a cylindrical mold.

Abstract: In order to improve the productivity of pressure-resisting bottles by reducing the blow time from 4-5 seconds in a conventional bottle molding method to not more than 3 seconds, and mold pressure resisting bottles free from the occurrence of crazing and bottom-breakage, a biaxially stretched blow molded bottle (1) of a synthetic resin having a big foot type petaloid bottom is produced in a blow time of not more than 3 seconds, and after the product has been released from the mold, the bottom portion (3) has become not higher than 70.degree. C., whereby the shortage of the capability of the metal mold of cooling the bottom portion (3) is supplemented. This allows both the prevention of the irregular deformation of the central part (6) of the bottom portion, and the molding of the bottom portion (3) of high pressure resisting strength and mechanical strength with a sufficient height H of the central part (6) of the bottom portion ensured.

Abstract: The invention relates to a blow moulding machine for manufacturing blow moulded large-volume vessels with upset flange rings from thermoplastic synthetic material. By changing exchangeable ring inserts, it is possible for two generically completely different vessel types--a plugged vessel and a removable-cover vessel body--to be manufacturable in one and the same blowing mould.

Abstract: A closed one-piece plastic drum having an integral handling ring at a head end is formed in a blow mold having mold halves and an articulating mold section. While the mold is open and the articulating section is spaced from the mold halves, a heated plastic parison is placed in the open mold and blown at a first blowing pressure (30-60 psi) to completely expand the parison into the shape of the inside surface of the mold and fill the open articulating section. This blow molding step forms an open handling ring as well as the drum body. A second blowing operation at a second lower pressure (15-40 psi) is then performed to stabilize the expanded parison inside the mold. The mold articulating section is closed during the second blowing operation in first and second sequences. In each sequence, the articulating section is moved over a different distance and at a different speed while compressing the blow-molded open handling ring into a solid handling ring.

Abstract: A method of making a blow-molded container from a strain-hardenable polymer, the container having deep recesses for secure "post mold" attachment of a handle. The container is formed in a modified blow mold having retractable blades. The blades are partially extended for blow molding partial recesses, and then further extended for mechanically forming the deep handle recesses. The mechanical forming operation overcomes the stretch limits imposed by strain-hardening of the plastic material during blow molding, and the "post-mold" attachment of the handle provides a reduced cycle time and lower level of defects compared to the known "in-mold" handle forming operations.

Abstract: A substantially cylindrical plastic parison is expanded within a blow mold against the internal walls thereof to form a plastic drinking vessel with a rim having substantially smooth inner and outer surfaces thereon. The inner surface is formed by a reciprocating cutter head assembly including an annular cutter blade with an outside diameter slightly less than the inside diameter of wall surfaces of the blow mold adjacent to a peripheral recess in the blow mold in which an external bead on the rim is formed. The cutter blade and cutter head assembly form a dome-shaped top in response to expansion of the parison. When the cutter blade is retracted axially from the blow mold the dome-shaped top is severed from the vessel. In an alternative embodiment the vessel and a partially severed dome-shaped top are removed as an integral unit from the blow mold and the dome-shaped top is then completely severed from the vessel utilizing a rotary cutter blade.

Abstract: In a method of molding a heat resistant container whose bottom has an inwardly raised part, firstly a preform is primary blow molded to form a primary blow molded article which is greater at least in length than the container to be obtained as a final product. Then the primary blow molded article is heat shrunk. This heat shrinking is restricted in such a manner that the length of the heat shrunk primary blow molded article from its top to its bottom center is greater than the length of the final product from its top to a peak of the raised part. Then at least the central region of the bottom of the heat shrunk primary blow molded article is inwardly pushed within a secondary blow cavity mold having a bottom mold by vertically moving the bottom mold. Finally in the secondary blow cavity mold, the resulting product is secondary blow molded so that the heel of a heat resistant container, as the final product, has a desired thickness.

Abstract: A container is produced from a preform which is formed by expansion in the axial and/or radial direction of a hollow blank of originally substantially amorphous material. In the production, the circumference of the preform is reduced by heating of material in the preform body, at least one material portion of the container body being displaced, by means of a mechanical forming device (30), in a direction towards the centre of the preform for forming an outer bounding surface of the container comprising material portions whose distance to the centre axis of the container is less than the distance of corresponding material portions to the centre axis (26) of the preform. An apparatus for producing the container includes the mechanical forming device which, during reforming of the preform into the container, abuts against material in the preform.

Abstract: A molding apparatus for making a hollow pressurized pulse dampener including a fixed platen having a primary member extending from the fixed platen and a secondary member including a centrally disposed aperture and a second mold surface to define a mold cavity for molding an intermediate member. The primary member extends through the centrally disposed aperture of the secondary member and includes a distal terminal end which includes a first mold surface for molding a pulse dampener. The first mold surface is disposed recessed within the secondary member such that the secondary member is moveable with respect to the primary member to present the first mold surface in the mold cavity to define the pulse dampener from the intermediate member. The secondary member includes means for continuously, positively and precisely pressurizing the mold cavity and the intermediate member until the first mold surface is presented within the cavity to mold the pulse dampener.

Abstract: A process for producing blow-molded containers having thickened flanges. The process utilizes movable mold halves having separable side and end components and a stationary central mold element disposed between the movable mold halves to form containers having thickened radial flanges. The movable mold halves and stationary central mold elements together enclose a mold chamber. After the parison of thermoplastic material has been blow-molded to conform to the mold chamber but while the material is still moldable, the movable mold halves simultaneously move together along the axis of the mold chamber to press the material against the stationary central mold element and thereby fold and bond the material onto itself, forming a thickened radial flange on each container. The flanges are each substantially twice as thick as a single layer of blow-molded material. The thickened flanges may also be formed to each include a thickened axial lip of material extending down from the respective radial flanges.

Abstract: Device for blow molding a hollow body with a blow molding device in which at least two solid flange rings are molded in the circumferential wall of the hollow body from the same thermoplastic synthetic material of the hollow body. The flanges are formed by compressing and fusing the material with a tandem slide. The movable slide parts travel unlike distances at unlike speeds of movement.

Abstract: A blow molded article and an apparatus and method for blow molding the article including a recessed lip. The apparatus includes two plates reciprocally movable toward and away from one another A center ring member and a separating ring are fixedly and perpendicularly mounted on each plate. A mold half is mounted on each plate and is divided into two sections. One section is located on each side of the center ring member and is reciprocally movable toward and away from the center ring member. A first insert member is provided in each mold section in proximity to said center insert member. The first insert has a channel therein for receiving a second insert member. The second insert member is reciprocally movable in said channel and engages the center ring member. The movement of the second insert member is synchronized with respect to the first insert member to move at a speed that is at least half the speed of the first insert.

Abstract: An apparatus is provided for forming a collapsed and folded thin-walled container. In collapsed and folded form, the container has first and second folded portions concentrically adjacent one another in generally surrounding relationship to tapered shoulder and reduced diameter neck portions of the container. The apparatus includes inner and outer, concentrically arranged and relatively movable pusher members for forming the first and second folded portions, respectively.

Abstract: An apparatus for producing blow-molded containers having thickened flanges. The apparatus utilizes major mold halves and a plurality of minor mold elements disposed within the mold halves to form containers having thickened flanges. The minor mold elements move radially relative to the mold halves and the joined pair of containers. While the blow-molded material is still moldable, the minor mold elements move radially inward to fold and bond the material onto itself, forming a pair of thickened radial flanges on each container. The flanges are each substantially twice as thick as a single layer of blow-molded material. Longitudinally-oriented reinforcing ribs are formed at the interstices of the minor mold elements which link the two thickened flanges and further strength the containers.

Abstract: A method for producing a plastic product including an axially extending portion, such as a duct or pipe, and a radially extending portion, such as a flange or bracket. A parison is placed in a first mold cavity defined in a mold and blow molded to form the axially extending portion, and then a movable mold segment is moved to a retracted position to define a second mold cavity adjacent to a part of an outer peripheral surface of the axially extending portion thus formed. Then, a second molted plastic material is supplied into the second mold cavity and the movable mold segment is again moved to another predetermined position to pressurize the second plastic material to thereby form a radially extending portion. The resulting hollow plastic product is extremely high in structural integrity between the axially and radially extending portions.

Abstract: A blow molded container formed of a polyester resin for use in hot fill applications. The container includes upright side walls, an integral base and a preselected outwardly thermoelastically deformable portion. Upon being filled with a liquid at an elevated temperature, the deformable portion of the container deforms outwardly to partially increase the volumetric size of the container. The remaining portions of the container generally shrink in response to being hot filled.

Abstract: A molding apparatus and method are adapted to mold an article having a hollow blow molded portion and a substantially solid compression molded portion. Defined within a mold is at least a first cavity portion and a second cavity portion. A parison is positioned within the mold and blow gas is injected into the interior of the parison to inflate the parison within each of the cavity portions. A compression member is then moved from a retracted position within a recess in the mold to an extended position outside of such recess. The compression member presses a first portion of the parison against the mold interior surface which defines the first cavity portion so as to compression mold a first portion of the parison. Inflation of a second portion of the parison in the second cavity portion accomplishes blow molding of such second parison portion.

Abstract: The present invention is directed to a blow molded article and an apparatus and method for blow molding the article. The article contemplated by the present invention includes a recessed lip. The apparatus includes two plates reciprocally movable toward and away from one another. A center ring member and a separating ring are fixedly and perpendicularly mounted on each plate. A mold half is mounted on each plate and is divided into two sections. One section is located on each side of the center ring member and is reciprocally movable toward and away from the center ring member. A first insert member is provided in each mold section in proximity to said center insert member. The first insert has a channel therein for receiving a second insert member. The second insert member is reciprocally movable in said channel and engages the center ring member.

Abstract: Device for blow molding a hollow body with a blow molding device in which at least two solid flange rings are molded in the circumferential wall of the hollow body from the same thermoplastic synthetic material of the hollow body. The flanges are formed by compressing and fusing the material with a tandem slide. The movable slide parts travel unlike distances at unlike speeds of movement.

Abstract: A method for producing an integral bottle/collar combination for use in a package for storing and dispensing potentially dangerous material such as medicament tablets. The package is resistant to opening by children yet readily openable by adults. The process includes a step of injection molding a polymeric part having a finish portion, a preform portion, and a flange portion. The flange portion has at least one integrally formed socket having a resiliently deformable pushtab connected by a hinge. The preform portion of the injection molded part is blow molded into the shape of the bottle. The hingedly connected pushtab is then folded into its in-use position.

Abstract: A molding apparatus is provided which is operated to mold an article having a hollow blow molded portion and a substantially solid compression molded portion. A mold is provided which has defined therein at least a first cavity portion and a second cavity portion. A parison is positioned within the mold and blow gas is injected into the interior of the parison to inflate the parison within each of the cavity portions. A compression member is then moved from a retracted position within a recess in the mold to an extended position outside of such recess. The compression member presses a first portion of the parison against the mold interior surface which defines the first cavity portion so as to compression mold a first portion of the parison. Inflation of a second portion of the parison in the second cavity portion accomplishes blow molding of such second parison portion.

Abstract: An outer shell for gasless type of self pressurized container and a method of manufacturing it, that is particularly designed for use with the type of self pressurized containers in which the pressure for the discharge of an agent is obtained by using an elastic sleeve that surrounds a plastic liner.

Abstract: The present invention is directed to an apparatus for blow molding a recessed lip in a molded article. The apparatus comprises two plates reciprocally movable toward and away from one another. A center ring member is fixedly and perpendicularly mounted on each plate. A mold half is mounted on each plate and is divided into two sections. One section is located on each side of the center ring member and is reciprocally movable toward and away from the center ring member. A first ring member is affixed to each said section in proximity to said center ring member and has a channel. A second ring member is reciprocally movable in said channel and engages the center ring member. The recessed lip is molded between said center ring member, the first ring member and the second ring member.

Abstract: An expandable section plastic tube having utility, for example, in inflatable balloon section catheters, and a method of making the same. The tube formed of thermoplastic material is inserted in a wall defining member, such as a mold, having an enlarged section surrounding a portion of the tube. The tube portion is then heated to a thermal plastic temperature and is expanded into the enlarged section by a sudden application of pressure resulting in a thinning of the tube wall in the expanded area. Thereafter, the tube is cooled and removed from the mold. In the making of a catheter, one section of the tube to one side of the expanded area is inverted and drawn into the section of the tube on the other side of the expanded area whereby the expanded area forms a balloon end at one end of the telescoped tube sections.

Abstract: A pre-formed (e.g. injection moulded) container body of flexible resilient plastics material is subjected to a subsequent cold-forming operation so that it is permanently deformed into a required configuration. For example, a desired container mouth configuration may be produced or handle-retaining recesses may be formed.

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: Process for producing a blown hollow vessel having an external annular projection integrally formed from the vessel wall in the blowing process. The vessel is formed initially in a mold having a reduced contour in the wall regions adjoining the annular projection. The vessel thus formed is then placed in a mold having the desired finished contour and blown to its final shape. In this manner, the vessel wall adjoining the annular projection is stretched and the inner surface of the vessel wall is smoothed in the area where the annular projection was formed.

Abstract: A process for forming a separable laminate container includes the steps of coextruding at least two substantially non-adhering thermoplastic compositions to form a tubular parison having a relatively thick outer layer and a relatively thin inner layer. The parison is subsequently blow molded and trimmed to provide an open-ended container body and an inner liner which is separable along the interior walls of the container body to permit closing and/or sealing of the liner, independent of the container. A lid may also be applied to the container body.

Abstract: A double-walled plastic box 20 is molded from a single parison 50 in an unlimited depth by closing and holding a bottom region of the parison at the bottom of a cavity 30, bringing together parts of a core 40 above the cavity to close off an upper region of the parison, moving the core, the cavity, or both vertically to position the core within the cavity and invert the parison so that a lower region of the parison forms an outside wall of the box against an inside surface of the cavity and an upper region of the parison forms an inside wall of the box against an outer surface of the core. The parison is then blown into a double-walled box 20 in the shape of an enclosed space between the cavity and the core.