Abstract: A primary molded bottle body 1 is blow molded with a bottomed and tubular lower body blank portion 9 suspended and continuously provided from the bottom of an upper body portion 2. The upper body portion 2 comprises a mouth tube 8 continuously provided through a shoulder portion 7 to the top end of a body wall 3 provided at the back portion thereof with a handle piece 4. Only the lower body blank portion 9 of primary molded bottle body 1 is blow molded by biaxial stretching into a lower body portion 9' to obtain a bottle body 1', so that a large-sized bottle body with a handle having the substantially equal strength to a biaxially stretched blow-molded bottle can be obtained.

Abstract: A method is provided for manufacturing a balloon for a catheter. The method comprises the steps of providing a mold having a mold cavity that generally corresponds to an intended expanded form of the balloon. Securing elements are provided at opposite ends of the mold cavity for securing end sections of a tubular parison. The end sections of the tubular parison are twisted in opposite directions with respect to each other. The end sections of the tubular parison are secured in the securing elements, the parison is heated, and a pressure differential is created between the inside and the outside of the parison to cause it to expand into a balloon against the walls of the mold cavity. The previously twisted end sections of the parison result in the balloon transition sections having spiral ridges, allowing the balloon to be folded into a small diameter.

Abstract: The invention relates to manufacturing a receptacle (23) suitable for being subsequently subjected to severe temperature conditions without deforming significantly, in which an intermediate receptacle (2) is molded by blowing or by stretching-blowing a preform (1) whose body is heated to at least the softening temperature of the thermoplastic material, which intermediate receptacle possesses dimensions greater than those of the final receptacle (23) and from which a blank is produced having a hot-shrunk body of predetermined length greater than that of the body of the final receptacle (23) and from which the body of the final receptacle is molded or blow-molded with the exception of its bottom zone, the length of the receptacle having an unmolded bottom zone being substantially the same as the length of the final receptacle (23), and finally the body and its bottom zone are blow-molded to take up their final shapes and dimensions in order to obtain the final receptacle (23).

Abstract: A method of easily molding a heat-resistant container which has a heat-resistant bottom portion, including a steps of primary blow-molding for molding a preform into a primary molded article, a step of heat treatment for the primary molded article, and a step of final blow-molding for molding the primary molded article which has been subjected the heat treatment into a final container, and a mold used for the method. In the step of primary blow-molding a raised-bottom portion is formed in the primary molded article using a raised-bottom mold, and this raised-bottom portion is of substantially the same shape as a raised-bottom portion of the final container. The preform has sufficient heat for a complicated mold, which thereby allows a raised-bottom portion of some complication and with adequate heat-resistance to be formed without difficulty.

Abstract: A biaxially oriented polyethylene terephthalate resin bottle-shaped container, and method of blow-molding the same, is disclosed. The method comprises the steps of heating the body portion of a preform at 90.degree. to 130.degree. C., biaxial-orientation blow-molding the preform in a primary blowing mold heated at 110.degree. to 230.degree. C. to form a primary intermediate molded bottle-shaped piece, heating the primary intermediate molded bottle-shaped piece at 130.degree. to 255.degree. C. or at a temperature which is at least 20.degree. C. greater than the primary blowing mold temperature to form a secondary intermediate molded bottle-shaped piece, and blow-molding the secondary intermediate molded bottle-shaped piece in a secondary blowing mold heated at 100.degree. to 150.degree. C. to form a bottle-shaped container. The temperature of the secondary blowing mold is several degrees greater than the maximum temperature the molded bottle-shaped container will be subjected to during use.

Abstract: A process for preparing a thermoplastic container including the steps of providing a biaxially oriented, crystallized precontainer having a first contained volume, and further crystallizing the precontainer by applying heat thereto while the precontainer is substantially unconstrained, and forming a deformed precontainer having a second contained volume. Deformation of the precontainer is controlled by controllably closing the precontainer prior to further crystallizing and while the precontainer remains substantially unconstrained to create a predetermined increased air pressure therein, and reshaping the deformed precontainer into a final container shape.

Abstract: There is provided a method of molding a large container including the steps of preparing a preform from an injection-molded, thick-wall, closed-end parison by repeatedly and intermittently applying an air blow pressure to the parison and releasing the air blow pressure therefrom, and stretch blow molding the preform to a thin-wall large container. The closed-end parison is released from a mold immediately after a skin layer, keeping a parison shape, is formed on the surface of the closed-end parison having a high inner temperature, and is then molded to a preform with a preform mold heated to a predetermined temperature, while the surface temperature of the parison is increased by the inner temperature. The preform is kept at a stretch blow molding temperature and is stretch blow molded into a blow mold to produce a large container.

Abstract: There is disclosed a method of manufacturing flexible elastomeric articles such as gloves, which comprises molding the glove body from a parison of the elastomeric material and stretching the stump portions into finger and thumb portions.

Abstract: A heat-resistant container forming method includes a step of thermally shrinking a primary blow molded article in a heating furnace before secondary blow molding the primary blow molded article into a final product or container. Into the furnace, hot air which flows along the longitudinal direction of the first blow molded article and whose temperature enough to facilitate crystallization of the primary blow molded article. The primary blow molded article is thermally shrunk by exposing the entire circumferential surface of a barrel of the primary blow article to the hot air and by blowing the hot air longitudinally along the primary blow molded article to heat the barrel circumferentially uniformly. Since hot air touches the barrel as flowing longitudinally thereof, it is possible to increase the heat conductivity of boundary film of the primary blow molded article, without increasing the hot air temperature too high, so that temperature rise of the primary blow molded article is facilitated.

Abstract: An apparatus and method for blow molding hot-fill containers by a double blow process while utilizing a single blow molding wheel. The apparatus has multiple stations including preheat station for conditioning the preforms, a blow molding station having a single blow molding wheel, a heat treating station where intermediate containers are heat treated. The blow molding wheel is provided with two sets of molds, one set for forming the intermediate containers and another set for forming the final containers. Two transfer mechanism are used to achieve four different transfers of the various stages of the final container. Preforms and heat treated intermediate containers are being respectively transferred into the first and second molds by one transfer mechanism while untreated intermediate containers and final containers are respectively removed form the first and second molds by the second transfer station.

Abstract: A biaxially-stretch-blow-molded container and a method of producing the same. Redraw ratio at the bottom portion is small in the secondary blow molding without employing a complex heating system but in which a secondary article obtained by subjecting a preform article to the primary blow molding is preferentially shrunk at its bottom portion, and a tertiary article or a quaternally article before being subjected to the secondary blow molding is obtained having a bottom of a flat shape or in which the central portion is recessed inwardly of the container and the periphery thereof is flattened. The bottle obtained by this method has a thickness and crystallinity in the bottom portion which are nearly the same as those of the center of the barrel and are highly oriented. The heat-resistant bottle exhibits excellent strength in the bottom portion and symmetrical panel-sinking stability in the vacuum pressure.

Abstract: A biaxially oriented polyethylene terephthalate resin bottle-shaped container, and method of blow-molding the same, is disclosed. The method comprises the steps of heating the body portion of a preform at 90.degree. C. to 130.degree. C., biaxial-orientation blow-molding the preform in a primary blowing mold heated at 110.degree. C. to 230.degree. C. to form a primary intermediate molded bottle-shaped piece, heating the primary intermediate molded bottle-shaped piece at 130.degree. C. to 255.degree. C. or at a temperature which is at least 20.degree. C. greater than the primary blowing mold temperature to form a secondary intermediate molded bottle-shaped piece, and blow-molding the secondary intermediate molded bottle-shaped piece in a secondary blowing mold heated at 100.degree. C. to 150.degree. C. to form a bottle-shaped container. The temperature of the secondary blowing mold is several degrees greater than the maximum temperature the molded bottle-shaped container will be subjected to during use.

Abstract: A blow molding apparatus is provided including a blow mold, an extrusion apparatus, a locator mechanism, and a blow pin. The blow mold has first and second blow mold halves which are engageable and disengageable with one another. The first and second blow mold halves define first and second inner cavities when the mold halves are engaged. The first cavity has a first shape and the second cavity has a second shape which differs from the first shape. The extrusion apparatus has a die head through which a parison is extruded. The locator mechanism is associated with one of the blow mold and the extrusion apparatus for changing the positioning between the blow mold and the die head to allow capture of an extruded parison by the first and second mold halves within a desired one of the first and second inner cavities such that the extruded parison can be formed into an article having substantially the same shape as the desired cavity.

Abstract: A method of producing a blow-molded PET container suitable for hot-filling includes the steps of injection molding a preform, blow-molding the preform into a primary molded article larger than the desired final container, heating the primary article in a series of oven chambers while its mouth is sealed so that pressure builds within the article to thereby control shrinkage, and blow-molding the shrunken article into the desired container. The two molds are preferably heated, and the mold contact time is as long as allowed by the manufacturing process to help remove internal stresses in the article. An apparatus for carrying out the method includes a first machine having an injection station, a thermal conditioning station, a primary blow-molding station, and an exit station. A second machine includes the oven chambers and a final blow-molding station.

Abstract: A method of making a polyester container having an enhanced level of crystallinity in the sidewall while maintaining a low level of crystallinity in a thickened base portion. The container is particularly useful as a refillable container which can withstand higher caustic wash temperatures and exhibits reduced flavor carryover, or as a hot-fill container. According to the method, a sidewall-forming section of a preform is initially expanded, heated to contract and crystallize the same, and than reexpanded; a base-forming portion of the preform is shielded from the heat treatment and is expanded either before or after the heat treatment step.

Abstract: A method of blow-molding a biaxially-oriented polyethylene terephthalate resin bottle-shaped container having high heat resistance and substantially no residual stress is disclosed.

Abstract: An apparatus for blow-molding PET containers suitable for hot-filling includes a first machine having an injection station, a thermal conditioning station, a primary blow-molding station, and an exit station. A second machine includes the oven chambers and a final blow-molding station. The primary article is sealed by a cap member that has a pressure relief valve connected to it to limit the internal pressure during heating, an air supply passage for final blow-molding, and a tensioning rod for insertion into the primary article and engaging a pocket in the center of the article's bottom. In some applications, it is necessary to stiffen the neck, particularly when hot-filling at about 200.degree. F. or higher, or when using a closure roll-on die or a lugged neck finish to apply a bottle cap to the final container.

Abstract: A biaxially oriented polyethylene terephthalate resin bottle-shaped container, and method of blow molding the same by heating the body portion of a preform at 90.degree. C. to 130.degree. C., biaxial-orientation blow-molding the preform in a primary blowing mold heated at 110.degree. C. to 230.degree. C. to form a primary intermediate molded bottle-shaped piece, heating the primary intermediate molded bottle-shaped piece at 130.degree. C. to 255.degree. C. or at a temperature which is 20.degree. C. or higher than the primary blowing mold temperature to form a secondary intermediate molded bottle-shaped piece, and blow-molding the secondary intermediate molded bottle-shaped piece in a secondary blowing mold heated at 100.degree. C. to 150.degree. C. to form a bottle-shaped container. The temperature of the secondary blowing mold is several degrees greater than the maximum temperature the molded bottle-shaped container will be subjected to during use.

Abstract: The process selectively crystallizes a molecularly oriented thermoplastic container composed of portions thereof with different degrees of orientation. Portions of the container are heat treated at temperatures suitable to crystallize said portions according to the degrees of orientation thereof wherein the heat treatment takes place in a heating environment on an unconfined container. The selectively crystallized container is then sized in a finishing means.

Abstract: A process and apparatus for annealing and heat treating biaxially oriented articles is disclosed, particularly blow molded articles prepared from preforms which are simultaneously annealed using warm fluid in a first segmented mold. The blown article is transferred to a second, larger mold where the article is pressurized against the mold to form the final container design and to heat treat at least a portion of the bottle wall to improve crystallinity and strength. Portions of the mold, used to form and anneal the articles, are temperature controlled at various temperatures by passing warm water through conduits in the neck-shoulder portion and body portion of the mold and cold water through the bottom and shoulder portion of the mold to bring the temperature of the article wall to about 65.degree. C. to 95.degree. C. for PET bottles. The second mold is up to 10% larger in volume and preferably employs resistance heating to heat treat the side wall to 110.degree. C. to 220.degree. C.

Abstract: A container with a suspension grip can be used as an infusion solution container for drip transfusion of blood or drip infusion of a solution. A method of manufacturing the container comprises making the bottom of the preform relatively thick and providing a blow metal mold on the bottom of its cavity having the shape of a container to be produced from the preform with a resin receptacle for forming a container grip so that at least part of the thick bottom of the preform enters the resin receptacle for grip formation at the time of blow molding to form a container grip.

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: Process crystallizes at least a portion of a molecularly oriented thermoplastic container by heat treating at least portions thereof at temperatures suitable to crystallize the portions, including the steps of heating at a first temperature for at least 5 seconds below a final crystallization temperature to heat set the container, followed by heating at a second temperature for at least 10 seconds at a final temperature to obtain crystallinity above 40%, wherein each of the heating steps is accompanied by shrinkage and distortion of the container; and sizing said crystallized container to a final shape.

Abstract: A method of producing a blow-molded PET container suitable for hot-filling includes the steps of injection molding a preform, blow-molding the preform into a primary molded article larger than the desired final container, heating the primary article in a series of oven chambers while its mouth is sealed so that pressure builds within the article to thereby control shrinkage, and blow-molding the shrunken article into the desired container. The two molds are preferably heated, and the mold contact time is as long as allowed by the manufacturing process to help remove internal stresses in the article. An apparatus for carrying out the method includes a first machine having an injection station, a thermal conditioning station, a primary blow-molding station, and an exit station. A second machine includes the oven chambers and a final blow-molding station.

Abstract: Blow molding processes for the manufacture of polyethylene terephthalate (PET) containers are disclosed. The containers are capable of withstanding, without appreciable deformation, relatively severe thermal conditions encountered during processing by filling with a hot liquid or pasteurization of the contents of the container. A representative process includes the steps of blow molding the heated body of an amorphous PET preform comprising a body and a neck section having a body with dimensions greater than the dimensions of the final PET container to be formed; heating only the body of the intermediate container under specified conditions to rapidly shrink the body, thus forming a contracted body; heating the neck section to effect crystallization thereof; slowly cooling the neck section alone while heating of the contracted intermediate body continues; and blow molding the heated contracted body of the intermediate container in a second mold to its final shape and dimensions.

Abstract: A plastic container, particularly suited for returnable and refillable PET carbonated beverage bottles, having an enhanced level of crystallinity in the sidewall but maintaining a very low level of crystallinity in the base. The container can withstand higher caustic wash temperatures and exhibits reduced flavor carryover from one product to another. The container is formed from a preform, wherein a sidewall-forming section of the preform is initially expanded and then heated to contract and crystallize the same before being reexpanded, and a base-forming portion of the preform is shielded from the heat treatment and expanded either before or after the heat treatment.

Abstract: A biaxially oriented polyethylene terephthalate resin bottle-shaped container made by thermally crystallizing a neck portion of a preform, heating the preform, blow-molding the preform to form a primary intermediate molded bottle-shaped piece, raising the temperature of the primary intermediate molded bottle-shaped piece to a temperature greater than the temperature during blow-molding the preform to thermally contract the primary intermediate molded bottle-shaped piece to form a secondary intermediate molded bottle-shaped piece, and blow-molding the secondary intermediate molded bottle-shaped piece to form a bottle-shaped container.

Abstract: A process for the manufacture of a polyethylene terephthalate (PET) container capable of withstanding, without appreciable deformation, relatively severe thermal conditions encountered during processing by filling with a hot liquid or pasteurization of the contents of the container. The process inlcudes the following steps, on an amorphous PET preform which includes a body and a neck section which already possesses the final shape and dimensions of the PET container to be formed, heating only the body, exclusive of the neck section, of the PET preform to a temperature at least equal to the PET-softening temperature; in a mold, blow molding the heated preform body to form an intermediate container whose body has dimensions greater, by about 20% with respect to height and by 0 to about 30% transversely, than the dimensions of the PET container to be formed, while cooling the mold walls holding the intermediate container to a temperature of about 5.degree. to about 40.degree. C.

Abstract: The apparatus includes advancement clamps which move two mutually facing films along an advancement direction on which the following are arranged in sequence: two welding half-molds, which by mutually welding the two films in preset regions define cells which are open toward a longitudinal edge of the films; two half-molds for heating the welded films; a cell forming station. Air injection nozzles, inserted between the two flaps of the films on the side of the above mentioned longitudinal edge, and two forming half-molds, in which forming cavities are defined at the cells, operate in the forming station. Divaricators for divaricating the two flaps of the films are provided proximate to the forming station so as to facilitate the insertion of the air injection nozzles.

Abstract: Apparatus and methods for forming dilatation balloons and catheters including same are provided. The balloons are fabricated of a material such as a nylon or a polyamide material, and they have been inflated, non-distended working profile as well as a stretched inflated profile which is achieved by applying pressure through a dilation catheter or the like that is in excess of that needed to achieve the inflated, non-distended profile and which is adequate to effect dilation or the like up to a maximum pre-bursting pressure application. The maximum pre-bursting size of the balloon can be tailored depending upon the needs of the particular balloon within a wide range of possible maximum pre-bursting sizes. The apparatus and methods facilitate fabrication of the balloons which are subjected to longitudinal elongation and radial expansion.

Abstract: A method of manufacturing a heat resistant plastic vessel including: injection molding a preform; primary stretch blow molding the preform to obtain a primary blow-mold object; heat-shrinking the primary blow-mold object; and secondary stretch blow molding the heat-shrunk object to obtain a secondary blow-mold object as a heat-resistant plastic vessel. In the primary stretch blow molding process, a concavity is formed on a body of the primary blow-mold object. The concavity has a thickness larger than the other body portion. In the heat-shrunk object, the large thickness portion has a lower heat retaining capacity than the other body portion. The heat-shrunk object then undergoes the secondary stretch blow molding process, thereby obtaining the secondary blow-mold object, which has a large thickness portion corresponding to the concavity of the primary blow-mold object to assure high mechanical strength such as buckling strength of the final product.

Abstract: A hollow container having a grip is formed by injection molding the grip and annular rings onto a blow molded container. An injection molded parison is first stretch blow molded to form a hollow container body having annular grooves. The hollow container body is then placed in a mold having molding grooves and a grip molding cavity. The molding grooves on the mold and the annular grooves on the container body together define connecting ring molding cavities. A pressure higher than ambient pressure is applied to the interior of the hollow container body. Then the grip and connecting rings are formed onto the hollow container body by injection filling the grip and connecting ring molding cavities.

Abstract: A method for stretch blow molding a preform into a hollow container having a heat-resistant property, including the steps of heat setting the hollow container by maintaining the hollow container heated for a predetermined period of time within a blow mold and cooling the hollow container by the use of a cooling medium blown out from the forward end of a stretching rod at least during backward movement of the stretching rod. If the heat setting operation is to be performed in a heat setting mold separately of the blow mold, the hollow container is cooled by the cooling medium blown out from the forward end of a cooling medium introducing rod while being moved. Since the cooling medium outlet is axially moved, the hollow container can be cooled uniformly, even if the hollow container has a particularly increased rate of longitudinal stretch.

Abstract: Apparatus and methods for forming dilatation balloons and catheters including same are provided. The balloons are fabricated of a biaxially orientable material such as a nylon or a polyamide material, and they have an inflated, non-distended working profile as well as a stretched inflated profile which is achieved by applying pressure through a dilatation catheter or the like that is in excess of that needed to achieve the inflated, non-distended profile and which is adequate to effect dilatation or the like up to a maximum pre-busting pressure application. The maximum pre-busting size of the balloon can be tailored depending upon the needs of the particular balloon within a wide range of possible maximum pre-busting sizes. The apparatus and methods facilitate fabrication of the balloons which are subjected to longitudinal elongation or axial orientation and biaxial or radial orientation.

Abstract: Apparatus and methods for forming dilatation balloons and catheters including same are provided. The balloons are fabricated of a biaxially orientable material such as a nylon or a polyamide material, and they have an inflated, non-distended working profile as well as a stretched inflated profile which is achieved by applying pressure through a dilatation catheter or the like that is in excess of that needed to achieve the inflated, non-distended profile and which is adequate to effect dilatation or the like up to a maximum pre-bursting pressure application. The maximum pre-bursting size of the balloon can be tailored depending upon the needs of the particular balloon within a wide range of possible maximum pre-bursting sizes. The apparatus and methods facilitate fabrication of the balloons which are subjected to longitudinal elongation or axial orientation and biaxial or radial orientation.

Abstract: A flat container may be produced by extruding a molten resin to form a parison, closing the bottom of the parison, preblowing the parison such that the inner surfaces do not contact together, drafting the parison in a molten state, expanding the parison with the outer edge of the parison extending beyond that of the cavity of a mold, pinching the expanded parison with the mold to fuse the outer edge portions together along the outer edge of the cavity, and forcing a pressurized fluid into the parison pinched by the mold so that the parison is shaped in close contact with the inside surfaces of the mold cavity.

Abstract: Apparatus and methods for forming dilatation balloons and catheters including same are provided. The balloons are fabricated of a biaxially orientable material such as a nylon or a polyamide material, and they have an inflated, non-distended working profile as well as a stretched inflated profile which is achieved by applying pressure through a dilatation catheter or the like that is in excess of that needed to achieve the inflated, non-distended profile and which is adequate to effect dilatation or the like up to a maximum pre-bursting pressure application. The maximum pre-bursting size of the balloon can be tailored depending upon the needs of the particular balloon within a wide range of possible maximum pre-bursting sizes. The apparatus and methods facilitate fabrication of the balloons which are subjected to longitudinal elongation or axial orientation and biaxial or radial orientation.

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 method of making flat bottles with flat or concave bottom by free extrusion of a plastic tube includes blowing of an intermediate form with circular cross section and shaping the latter essentially mechanically to the flat bottle at simultaneous final blowing for achieving clean radii. It is essential that the intermediate form is blown at a length corresponding to about the height of the flat bottle, with a circumference in the body area of -1 to about -10%, however, in the bottom near area of the side walls from 0 to about +15%, with regard to the corresponding circumference of the flat bottle. The radius of curvature at the junction from the body wall to the bottom should correspond to about the radius of curvature at the junction from the body wall of the broad side of the flat bottle to its bottom. The bottom part corresponding to the pinched end of the tube is pinched off during shaping.

Abstract: A method for making a partially crystalline, biaxially oriented heat set hollow polyethylene terephthalate free standing container from a hollow parison having an open end and a closed end including engaging the open end of a plastic parison which is at a temperature within its molecular orientation temperature range, positioning a mold base in axial alignment with said engaged hot parison, enclosing a hot mold about the mold base, the mold being at heat setting temperature and the mold base being at a temperature preferably significantly lower than the mold, expanding the plastic parison within the hot mold and mold base by internal pressurization to induce biaxial orientation of the plastic parison and force the plastic parison into intimate contact and conformance with the hot mold and to maintain contact by such internal pressurization between the mold and mold base and the biaxially oriented container for a time sufficient to induce partial crystallization in the side wall and base of the biaxially orien

Abstract: A method and apparatus of forming a hollow partially crystalline heat set biaxially oriented polyethylene terephthalate container having a hemispherical base comprising blowing a heated parison at orientation temperature outwardly against the confines of a mold which is at heat setting temperature wherein the side wall and the major portion of the base of the container are subjected to a heat setting temperature and the center of the base of the container is subjected to a temperature not greater than 150.degree. C. so that the central portion is crystallized a substantially lesser amount than the side wall and the major portion of the base. The container is then quenched. The resultant container can be formed at a rapid cycle and has good drop impact properties and obviates the problems of sticking to the hot mold or blow out when the hot mold is opened.

Abstract: A method for making a partially crystalline, biaxially oriented heat set hollow plastic container from a hollow poly(ethylene) terephthalate parison having an open end and a closed end comprising engaging the open end of a plastic parison which is at a temperature within its molecular orientation temperature range, enclosing a hot mold about the hot parison, the mold being at heat setting temperature, expanding the plastic parison within the hot mold by internal pressurization to induce biaxial orientation of the plastic parison and force the plastic parison into intimate contact and conformance with the hot mold and to maintain contact by such internal pressurization between the mold and the biaxially oriented container for a time sufficient to induce partial crystallization in the biaxially oriented container, maintaining a lower internal pressurization of the container to prevent significant shrinkage, opening the hot mold while maintaining engagement of the open end of the blown hollow container, enclosin

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 method for making a partially crystalline, biaxially oriented heat set hollow plastic container from a hollow parison having an open end and a closed end comprising engaging the open end of a plastic parison which is at a temperature within its molecular orientation temperature range, positioning a mold base in axial alignment with said engaged hot parison, enclosing a hot mold about the mold base, the mold being at heat setting temperature, expanding the plastic parison within the hot mold and mold base by internal pressurization to induce biaxial orientation of the plastic parison and force the plastic parison into intimate contact and conformance with the hot mold and to maintain contact by such internal pressurization between the mold and the biaxially oriented container for a time sufficient to induce partial crystallization in the biaxially oriented container, lowering the internal pressure in the container, opening the hot mold while maintaining engagement of the open end and engagement of the mold b

Abstract: A heat resistant container is made from a PET preform by crystallizing its neck (10), heating just its body to the softening temperature of PET, blow molding an intermediate container (21) in a cooled mold (5.degree. to 40.degree. C.) with a larger volume than that of the final container to be obtained, heating the intermediate container to 180.degree.-220.degree. C. for 1 to 15 min, and then molding it a second time to its final dimensions at a temperature of 80.degree.-100.degree. C. for 2 to 6 sec.

Abstract: A generally rectangular, double-walled box 10 is blow molded in a pair of separately formed diagonal halves 10a and 10b, each including adjoining side walls 11 and 12 subtending a diagonal half of the bottom 15 of box 10. Walls 11 and 12 of each diagonal half are oriented obliquely to the parting plane 43 of a mold 40 that has a cavity 42 and core 41 for forming the inner and outer walls of each box half 10a and 10b. The halves are assembled together along a junction region 13 and 14, preferably so as to trap a hinged cover 20. By filling the interwall cavities of the box with a suitable insulation material, the box can be used for fire resistant storage or cold storage.

Abstract: A multilayer biaxially oriented heatset article and method of making forming a preform comprising an outer layer and an inner layer of poly(ethylene terephthalate) (PET), an intermediate layer of olefin-vinyl alcohol copolymer, a layer of adhesive laminating the olefin-vinyl alcohol copolymer layer and the outer layer and a layer of adhesive laminating the inner olefin-vinyl alcohol copolymer layer and the inner layer. The preform is then heated to orientation temperature and blown against a heatset hot mold to produce an article such as a container that has high barrier properties, improved thermal stability, i.e., capable of being hot filled at elevated temperatures, have layer uniformity, good interlayer adhesion., good transparency and is light in weight.

Abstract: Method for producing containers such as for example bottles, from extruded and blow-molded plastic material, including bringing a tubular preform closed at its upper end and of which the outer surface of the wall is brought to a temperature of at least 140.degree. C., to a station where the containers are shaped by extrusion and blow-molding, after cooling down the said preform to a temperature around 118.degree. C. The cooling down of the preform, from its initial temperature before it reaches the container shaping station is controlled, first by the ambient atmosphere (a,b,c) then in a plurality of enclosures (d to k), closed at their upper end, in each one of which heat is supplied on the outer surface of the preform in order to obtain, at the exit from the last enclosure, as even a temperature as possible around 118.degree. C. through the thickness of the preform wall.

Abstract: A temperature control blow molding equipment which has a temperature control mold and a blow mold on one seat body and which is used in an injection stretch blow molding machine comprising a disk-like moving plate intermittently rotatably disposed above a base disk, a plurality of neck molds provided at regular intervals under the carrying plate, and operation zones disposed at stop positions of the neck molds, the operation zones being necessary for a series of treatments from an injection molding of a parison to a removal of a molded article.

Abstract: This relates to a container which is formed of a thermoplastic material, preferably PET, wherein the container wall and flanges have a high degree of orientation and the required strength characteristics utilizing a minimum of resin in the formation thereof. An intermediate article of manufacture is formed with this article having a generally bottle-like configuration. The intermediate article of manufacture, which is blow molded from a conventional preform configuration, includes a lower portion in the configuration of the desired container and an upper portion which is an accommodation portion. The accommodation portion is removed from the container and becomes scrap which is reground. This abstract forms no part of the specification of this application and is not to be construed as limiting the claims of the application.