Comprising Staged Inflation Means Patents (Class 425/530)
  • Publication number: 20150042021
    Abstract: A stretch blow molding system (200) is provided. The stretch blow molding system comprises a cylinder (201) including a movable stretch rod (202) and a blow-mold valve (204). The blow-mold valve (204) comprises a first fluid port (204a) in fluid communication with a first pressurized fluid source (364a). The blow-mold valve (204) also includes a second fluid port (204b) in fluid communication with a second pressurized fluid source (364b). A third fluid port (204c) of the blow-mold valve is in fluid communication with the cylinder (201) and selectively in fluid communication with the first fluid port (204a) and the second fluid port (204b).
    Type: Application
    Filed: April 26, 2013
    Publication date: February 12, 2015
    Applicant: NORGREN AG
    Inventor: Daniel Schmid
  • Patent number: 8951461
    Abstract: The invention relates to a method for producing a plastic article and a blow molding tool for performing the method. The method comprises extruding an approximately tube-shaped preform, dividing the melt flow within the extrusion head or separating the extrudate exiting or already exited from the extrusion head, such that a preform having an approximately C-shaped cross section is obtained, forming the preform into a hollow part within a multipart blow molding tool using differential pressure, wherein an expansion and partial preforming of the preform first takes place with the blow molding tool partially closed, then in a further step at least one insert is inserted into the interior of the partially preformed article between the not completely closed blow molding tool and through the open side of the preform, and in a further step the blow molding tool is completely closed; wherein the article is completely formed, forming at least one at least partially circumferential pinch-off seam.
    Type: Grant
    Filed: June 22, 2010
    Date of Patent: February 10, 2015
    Assignee: Kautex Maschinenbau GmbH
    Inventors: Volker Heim, Andreas Lichtenauer, Jurgen Moitzheim, Stefan Walbroel
  • Patent number: 8894910
    Abstract: A method and a device for recycling compressed gas where the compressed gas used in a compressed gas consumer, particularly a container blow-molding machine, is fed back into a compressed gas generator. In order to increase the recycling volume, the compressed gas from the compressed gas consumer is collected separately and fed back to at least a first and a second pressure range of the pressure generator separately according to pressure stages.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: November 25, 2014
    Assignee: Krones AG
    Inventors: Klaus Voth, Stefan Rossmann
  • Patent number: 8827688
    Abstract: A system for forming a container from a preform, wherein the preform has a finish and a support ring. The system includes a mold having a mold cavity defining an internal surface and adapted to accept the preform, a pressure system having an inlet and an outlet outputting fluid, a blow nozzle receiving the fluid from the pressure system and introducing the fluid at a pressure into the preform thereby expanding the preform toward the internal surface of the mold cavity and creating a resultant container. The system further includes a first seal engagement selectively engageable between the blow nozzle and the finish of the preform and a second seal engagement selectively engageable between the blow nozzle and an adjacent feature.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: September 9, 2014
    Assignee: Amcor Limited
    Inventors: Kirk Edward Maki, George David Lisch, Bradley Wilson
  • Patent number: 8741206
    Abstract: An improved stretch rod tip having a hollowed area for receipt of a portion of a preform and at least a portion of a sprue during stretch blow molding of a container. Upon hardening of the container, the received portion of the preform becomes a protective dome over the received portion of the sprue that is at least partially internal to the container and that greatly reduces cracking, shearing, or other fracturing of the container due to a drop impact.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: June 3, 2014
    Assignee: Eastman Chemical Company
    Inventor: Robert Ellis McCrary
  • Publication number: 20140145377
    Abstract: In a blow moulding machine for the production of plastics material containers, during a blow mould procedure, the container to be expanded is supplied with blow moulding air from a first gas preparation device on the one hand or from a second gas preparation device on the other hand. During this procedure a cooling of the base of the container is additionally carried out.
    Type: Application
    Filed: April 17, 2013
    Publication date: May 29, 2014
    Applicant: Krones AG
    Inventor: Peter KNAPP
  • Patent number: 8714963
    Abstract: An apparatus and method for simultaneously forming and filling a plastic container is provided. A mold cavity defines an internal surface and is adapted to accept a preform. A pressure source includes an inlet and a piston-like device. The piston-like device is moveable in a first direction wherein liquid is drawn into the pressure source through the inlet and in a second direction wherein the liquid is urged toward the preform. A blow nozzle may be adapted to receive the liquid from the pressure source and transfer the liquid at high pressure into the preform thereby urging the preform to expand toward the internal surface of the mold cavity and creating a resultant container. The liquid remains within the container as an end product.
    Type: Grant
    Filed: May 13, 2010
    Date of Patent: May 6, 2014
    Assignee: Amcor Limited
    Inventors: David Andison, G. David Lisch, Dan Weissmann, John Granata, Fred C. Beuerle
  • Patent number: 8602771
    Abstract: The mould carrier unit for manufacturing containers by a stretch blow-moulding operation of preforms (3) arranged in moulds (2), comprises: on the one hand, a stretching rod (10) borne by a slide (13) which is mobile between an inactive position and an active position where its free end reaches the bottom of said mould (2), on the other hand, a nozzle (15) comprising a fixed body (16) extended by a bell (20), which is mobile under the action of appropriate means for passing from an inactive position where its free edge (25) is held substantially at the same level as the free end (11) of the stretching rod (10) to an active position where it is sealingly applied against the inlet surface (4) of the mould (2), to close the circuit of the blowing fluid, and said bell (20) comprises a bar (21) provided with a stop (23), which stop (23) cooperates with a support (24) formed on said slide (13) to permit said bell (20) to pass from its active position to the inactive position with the same law of motion as sa
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: December 10, 2013
    Assignee: Sidel Participations
    Inventors: Fabien Eudier, Nicolas Rousseau, Laurent Danel, Frederic LeComte
  • Patent number: 8500437
    Abstract: Process for manufacturing a plastic hollow body, the process comprising the following steps: a) a tubular stream of molten plastic is extruded; b) this stream is taken up by means of a tensioning device; c) a transverse cut is made in this stream so as to create a parison having one free edge that is not taken up by the tensioning device; d) the parison is moved relative to the tensioning device so that the free edge of the parison is also taken up by the tensioning device; and e) at least one longitudinal cut is made in the parison over its entire length. Equipment suitable for implementing this process.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: August 6, 2013
    Assignee: Inergy Automotive Systems Research (S.A.)
    Inventors: Pierre-Francois Tardy, Bjorn Criel, Philippe Bournonville
  • Publication number: 20130193027
    Abstract: A process for producing containers includes the steps of providing a container having a shaping region, the shaping region comprising a thermoplastic material; applying an ink to the shaping region; discretely heating the shaping region to a shaping temperature; and discretely shaping the shaping region to take a desired three dimensional shape. A system for producing containers having three dimensional decorations, and containers having three dimensional decorations, are also disclosed.
    Type: Application
    Filed: January 27, 2012
    Publication date: August 1, 2013
    Applicant: Altira, Inc.
    Inventor: Faustino Poo
  • Patent number: 8357326
    Abstract: A device for producing a tubular object from thermoplastic material includes a die, a plunger, and a withdrawal unit. The movements of the withdrawal unit, plunger and die body are controlled such that the movement of the withdrawal unit is carried out according to a freely adjustable velocity profile over the path of the withdrawal unit. Movement of the plunger is carried out according to a freely adjustable velocity profile over the plunger path and movement of the die body is carried out according to a freely adjustable position profile over the path of the withdrawal unit or plunger. In this manner, the wall thickness of the tubular object may be adjusted with high accuracy over its length.
    Type: Grant
    Filed: April 23, 2007
    Date of Patent: January 22, 2013
    Assignee: Ossberger GmbH & Co.
    Inventor: Kiefer Dieter
  • Patent number: 7976754
    Abstract: Process for manufacturing a plastic hollow body, the process comprising the following steps: a) a tubular stream of molten plastic is extruded; b) this stream is taken up by means of a tensioning device; c) a transverse cut is made in this stream so as to create a parison having one free edge that is not taken up by the tensioning device; d) the parison is moved relative to the tensioning device so that the free edge of the parison is also taken up by the tensioning device; and e) at least one longitudinal cut is made in the parison over its entire length. Equipment suitable for implementing this process.
    Type: Grant
    Filed: August 22, 2008
    Date of Patent: July 12, 2011
    Assignee: Inergy Automotive Systems Research (S.A.)
    Inventors: Pierre-Fran├žois Tardy, Bjorn Criel, Philippe Bournonville
  • Patent number: 7892477
    Abstract: A process and a device for the manufacture of a hollow body, particularly of a heat-resistant hollow body, which is molded out of a heated preform of thermoplastic plastic in a contoured blow mold through the introduction of a first medium into the preform, which medium is stored in a first medium storage unit and is under a pressure (p1) (preblowing phase), and the more or less simultaneous stretching of the hollow body through a stretching rod and the introduction of a second medium in the hollow body, which medium is stored in a second medium storage unit and the pressure of which (p2) is higher than the pressure of the first medium (p1) (final blowing phase), and which is cooled by a third medium, which is medium stored in a third medium storage unit (rinsing phase), whereby the preblowing medium is under a pressure of approximately 2-20 bar, the final blowing medium is under a pressure of approximately 15-45 bar, and the cooling medium is under a pressure of approximately 30-45 bar.
    Type: Grant
    Filed: March 8, 2005
    Date of Patent: February 22, 2011
    Assignee: Krones AG
    Inventor: Jochen Hirdina
  • Patent number: 7803311
    Abstract: A device for molding a container from a thermoplastic material in which a heated parison is pre-blown by supplying low-pressure blowing air from a low-pressure air supply and then the blow molding is completed by subsequent supply of high-pressure blowing air and in which the high-pressure blowing air flowing out of the container that has been completely blow molded is supplied to the low-pressure air supply via a reversing mechanism during a transitional phase. A pressure monitoring is performed in the area of the low-pressure air supply and in which, after the transitional phase, the container is vented with respect to an ambient pressure whereby the pressure in the low-pressure air supply is controlled by varying the duration of the transitional phase.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: September 28, 2010
    Assignee: Krones AG
    Inventors: Dieter Finger, Helmut Asbrand
  • Publication number: 20090047374
    Abstract: Disclosed herein is a mold module from a set of substantially structurally independent mold modules of at least one of a first mold assembly or a second mold assembly. The first mold assembly and the second mold assembly for accepting, in use, a plurality of first mold inserts and second mold inserts, respectively, to define, in use, a plurality of substantially identical molding cavities therebetween. A subset of at least one of the first mold inserts or the second mold inserts being accepted in the mold module.
    Type: Application
    Filed: August 16, 2007
    Publication date: February 19, 2009
    Inventors: John Robert GALT, Thomas Michael McGinley, Sheldon John Alexander, Christopher J. Brusa, Stephen Daniel Ferenc
  • Patent number: 7147456
    Abstract: The present invention relates to a mold device having a combination of molds for stretch blow molding, comprising a main blow mold 5, installed on a pair of platens 2 by being separated into split molds 5a, a pre-blow mold 10, attached to a lifting device 11 under the area between the split molds 5a, and movable in and out from the area between the split mold 5a, a neck mold 7, which is fitted into the pre-blow mold 10 and main blow mold 5 respectively, a blow core 20, which is fitted in to the neck mold 7, and a stretch rod. The pre-blow mold 10 comprises a cylindrical member having an open end on the upper portion, which is fitted into the neck mold 7. A bottom mold 8 of the main blow mold 5 is installed in the bottom portion of the split mold 5a by being separated into split bottom molds 8a. Lifting cylinders 9 are placed under the both of the split bottom molds 8a in order to make the bottom mold 8 movable in and out from the bottom portion of a cavity.
    Type: Grant
    Filed: August 25, 2004
    Date of Patent: December 12, 2006
    Assignee: A.K. Technical Laboratory, Inc.
    Inventors: Daigo Fujii, Takekazu Mochizuki
  • Patent number: 6582649
    Abstract: A forced exhaust pipe is connected to an exhaust pipe connected with a cross head so that a negative pressure may be formed within an air passage so as to effect rapid control of air pressure (amount) within a parison, thereby stabilizing the air pressure within the parison. A parison stabilizing method and a system therefor for use in a hollow formation molding machine, according to the present invention, are so formed that a forced air-discharge is carried out through an exhaust pipe connected with the air passage formed within the cross head, so that a negative pressure is formed within the air passage. In this way, the above-mentioned system can effect quick control of an air pressure (amount) within the prison during a pre-blowing treatment, shorten a time period necessary for determining molding conditions, without having to increase the inner diameter of the air passage.
    Type: Grant
    Filed: November 13, 2000
    Date of Patent: June 24, 2003
    Assignee: The Japan Steel Works, Ltd.
    Inventors: Shigeaki Sano, Ken Nakao, Sohei Masaki, Kunihiro Hijikata
  • Patent number: 6447710
    Abstract: The invention concerns a method for making plastic tubes, whereby a tube blank (Te) brought to a temperature close to molecular orientation temperature is subjected to a bi-axial drawing, by radial expansion of the tube blank inside a forming shaft (2), with formation of a contraction cavity at one end of the tube, by controlled displacement of this contraction cavity to the other end of the tube, and by longitudinal drawing. The radial expansion is carried out in at least two phases, viz. a first phase during which the tube blank (Te) is inflated to an intermediate diameter (Di) determined by a double-walled envelope (21), introduced into the forming shaft (2), with circulation of a hot fluid between the two walls of the envelope (21), and then the envelope is gradually removed from the forming shaft (2) to enable, during a second phase, the radial expansion of the plastic tube up to an internal diameter of the forming shaft (2), and its longitudinal drawing.
    Type: Grant
    Filed: March 22, 1999
    Date of Patent: September 10, 2002
    Assignee: Alphacan
    Inventors: Bernard Prevotat, Jean-Jacques Acket
  • Publication number: 20020011681
    Abstract: The process and device are intended for controlling the molding of a container during the manufacture of containers from a thermoplastic material. At least two previously injection-molded preforms are temperature-treated and delivered in succession to at least one blow station for blow molding of the preforms into containers. In order to compensate for nonuniform temperature distribution in the material of the preforms relative to one another, at least one blow parameter during molding of the preforms into containers is specified in a fashion that differs from one to the next. The differing specification is made in such a manner as to compensate for the nonuniform temperature distribution so that containers with approximately identical spatial distribution of wall material, orientation properties, and crystallization characteristics exist when the blow-molding process is finished.
    Type: Application
    Filed: March 16, 2001
    Publication date: January 31, 2002
    Inventors: Peter Rose, Willi Predohl
  • Patent number: 6090334
    Abstract: A container obtained by biaxially stretch-blow-molding a resin. Except the mouth-and-neck portion, vicinities thereof and the center of the bottom portion, the container as a whole is reduced in thickness under a highly drawing condition without accompanied by whitening, and a portion constituting the bottom valley portions has an yielding load of not smaller than 25 kg/cm at 70.degree. C. The container exhibits excellent heat resistance, pressure resistance, shock resistance as well as self-standing ability.
    Type: Grant
    Filed: July 14, 1998
    Date of Patent: July 18, 2000
    Assignee: Toyo Seikan Kaisha, Ltd.
    Inventors: Kenji Matsuno, Nobuyuki Kato, Hiroo Ikegami, Setsuko Nakamaki, Kimio Takeuchi, Hotaka Fukabori, Yoshitsugu Maruhashi, Hideo Kurashima
  • Patent number: 6074596
    Abstract: The apparatus has means (10, 11) for placing a parison (12) between two portions of a blow mold (14, 16). The parison (12) is put on the head of a blowpipe (32) placed between the two mold portions. On closing the mold, the top end of the parison is pinched in a top region of the mold and the bottom end of the parison is clamped against the blowpipe (32). A pre-blow step is performed on the parison to obtain an envelope which is then turned over by moving the blowpipe (32) upwards together with a turnover piston (34, 36), prior to performing a final blow step.
    Type: Grant
    Filed: July 1, 1998
    Date of Patent: June 13, 2000
    Assignee: Grosfillex S.A.R.L.
    Inventor: Gaston Jacquet
  • Patent number: 5975880
    Abstract: A heat-resistant container molding apparatus and method which are compact and inexpensive and can reliably increase the crystallinity, reduce the residual stress in a container filled with a hot content such as thermally sterilized fruit juice, and prevent a thermal deformation with improved container stability at a raised temperature. The apparatus has a receiving and removing unit for receiving primary moldings obtained by blow-molding preforms and for removing final products, a heat treatment section for heating the primary moldings by bringing the primary moldings into contact with the inner wall of a heat treatment mold while pressurizing the interior of the primary moldings within the heat treatment mold, a final molding section for blow molding intermittent moldings into final products within a final blow mold, and a rotary plate, neck support fixing plate and neck support member for conveying the moldings through the receiving and removing unit, heat treatment section and final molding section.
    Type: Grant
    Filed: November 28, 1997
    Date of Patent: November 2, 1999
    Assignee: Nissei ASB Machine Co., Ltd.
    Inventors: Minoru Takada, Koichi Sato, Kazuyuki Yokobayashi, Kazuya Kitamura, Atsushi Sakurai
  • Patent number: 5849241
    Abstract: Multichamber tubular containers are made by extrusion or injection stretch blow molding. The containers usually will have two or three chambers and one or more web walls. The web walls are relatively rigid as formed. The web walls must be stretched laterally to increase their flexibility which is needed for the uniform dispensing of product from the tubular chambers. The webs can be stretched mechanically by the rotation of rods, such as stretch rods, or pneumatically by a differential gas pressure in the chambers while the webs are at or near the glass transition temperature and can flow. The web walls for a circular tubular container can be stretched up to about one-half the diameter of the tubular container.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: December 15, 1998
    Assignee: Colgate-Palmolive Company
    Inventor: Patrick Andre Connan
  • Patent number: 5770003
    Abstract: A system for moulding containers in thermoformable and heat-weldable material. The system includes a heating and welding station and a forming and shape-stabilizing station, with at least one welding and forming station in-between, producing progressive forming and shape-stabilizing of the containers.
    Type: Grant
    Filed: July 11, 1995
    Date of Patent: June 23, 1998
    Assignee: Unifill S.p.A.
    Inventors: Roberto Tabaroni, Andrea Bartoli
  • Patent number: 5681520
    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.
    Type: Grant
    Filed: September 21, 1995
    Date of Patent: October 28, 1997
    Assignee: A.K. Technical Laboratory, Inc.
    Inventors: Hideaki Koda, Hisashi Nakajima
  • Patent number: 5622735
    Abstract: A fluid supply apparatus for a blow mold, which includes a control valve having multiple positions for alternatively supplying fluid to the blow mold from a fluid supply and a metering chamber. The control valve has a further position configured to fill the metering chamber with fluid, and empty the blow mold chamber into an exhaust conduit. The apparatus is useful for performing pulse blow inflations at a high-strain rate in order to increase the crystallinity level in the body of a container.
    Type: Grant
    Filed: September 7, 1995
    Date of Patent: April 22, 1997
    Assignee: Continental PET Technologies, Inc.
    Inventors: Suppayan M. Krishnakumar, Wayne N. Collette, Nikhil Mani
  • Patent number: 5505612
    Abstract: An 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.
    Type: Grant
    Filed: January 17, 1995
    Date of Patent: April 9, 1996
    Assignee: PepsiCo Inc.
    Inventors: Christopher Mero, John Cahill
  • Patent number: 5383779
    Abstract: Apparatus for forming a lightweight plastic bottle having a body and an integral handle includes pre-blowing a tubular parison positioned between partible blow mold sections, closing the blow mold sections to compression mold the handle and blowing the parison to form the body integral with the handle and a line of juncture between the body and the handle.
    Type: Grant
    Filed: November 22, 1993
    Date of Patent: January 24, 1995
    Assignee: Owens-Illinois Plastic Products Inc.
    Inventor: Gerald R. Robinson
  • Patent number: 5281387
    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.
    Type: Grant
    Filed: July 7, 1992
    Date of Patent: January 25, 1994
    Assignee: Continental PET Technologies, Inc.
    Inventors: Wayne N. Collette, Suppayan M. Krishnakumar, Chih C. Lin
  • Patent number: 5223205
    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.
    Type: Grant
    Filed: October 3, 1991
    Date of Patent: June 29, 1993
    Assignee: Cordis Corporation
    Inventors: Stefan Jackowski, Leonard Pinchuk
  • Patent number: 5169705
    Abstract: Apparatus includes a blow mold, a holding device for holding the parison within the blow mold, a blow device for forming a blown article in the blow mold and a stretch rod for stretching the parison movable in the holding device. A device is provided for determining the position of the stretch rod in the holding device channel and for synchronizing the transmission of high pressure fluid to the parison based on the position of the stretch rod.
    Type: Grant
    Filed: December 16, 1991
    Date of Patent: December 8, 1992
    Assignee: Husky Injection Molding Systems Ltd.
    Inventors: Bruce Coxhead, Tom Van Leeuwen
  • Patent number: 5145632
    Abstract: A process for the manufacture of a polyethylene terephthalate (PET) container from a hollow amorphous PET preform which includes an open end and a closed end, the open end forming a neck section having dimensions already conformed to its final size and shape, the container being able to withstand relatively severe thermal conditions encountered when the container is filled with a hot liquid, without appreciable deformation, including the steps of: a) rapidly heating only the body of the PET preform, exclusive of the neck section, to a temperature at which subsequent longitudinal and transverse stretching cause no stresses in the PET; b) transferring the hot preform from step (a) to a mold whose walls are maintained at a temperature lower than the temperature of the hot preform body; c) longitudinally stretching the preform body while simultaneously transversely expanding it by blow-molding using a pressurized fluid so as to mold the preform body to the shape of the mold cavity; d) rapidly evacuating the press
    Type: Grant
    Filed: June 28, 1990
    Date of Patent: September 8, 1992
    Assignee: Sidel
    Inventors: Gerard Denis, Jean-Michel Ruis, Paul La Barre
  • Patent number: 5139410
    Abstract: A parison stick is used with an injection-blow molding machine for injection-blow molding of a hollow article of plastic material from a parison of this plastic material. The stick has three axially-contiguous portions. The portion (A) connects the parison stick to the injection-blow molding machine. The portion (B) positions the parison stick in the wall of a mold within the machine. The portion (C) terminates in the cavity of the mold and includes distinctly and axially-spaced first and second openings through which gas blows and inflates a parison previously injected around this portion. The openings are connected to a gas-feed chamber via at least one channel. The parison stick further includes at least one obturator connected to an actuator which is controlled by a control member of the machine.
    Type: Grant
    Filed: January 7, 1991
    Date of Patent: August 18, 1992
    Assignee: Kerplass.N.C.
    Inventor: Alain Trebot
  • Patent number: 5055024
    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.
    Type: Grant
    Filed: August 2, 1990
    Date of Patent: October 8, 1991
    Assignee: Cordis Corporation
    Inventors: Stefan Jackowski, Leonard Pinchuk
  • Patent number: 5017325
    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.
    Type: Grant
    Filed: December 19, 1989
    Date of Patent: May 21, 1991
    Assignee: Cordis Corporation
    Inventors: Stefan Jackowski, Leonard Pinchuk
  • Patent number: 5002718
    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.
    Type: Grant
    Filed: July 18, 1989
    Date of Patent: March 26, 1991
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Hirosi Tanaka, Kozo Morisige
  • Patent number: 4938676
    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.
    Type: Grant
    Filed: July 24, 1989
    Date of Patent: July 3, 1990
    Assignee: Cordis Corporation
    Inventors: Stefan Jackowski, Leonard Pinchuk
  • Patent number: 4900504
    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.
    Type: Grant
    Filed: November 30, 1987
    Date of Patent: February 13, 1990
    Inventor: Rainer Fischer
  • Patent number: 4853171
    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
    Type: Grant
    Filed: March 24, 1988
    Date of Patent: August 1, 1989
    Assignee: Owens-Illinois Plastic Products Inc.
    Inventor: Prakash R. Ajmera
  • Patent number: 4842802
    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.
    Type: Grant
    Filed: October 17, 1988
    Date of Patent: June 27, 1989
    Assignee: Mauser-Werke GmbH
    Inventor: Dietmar Przytulla
  • Patent number: 4839127
    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
    Type: Grant
    Filed: March 4, 1987
    Date of Patent: June 13, 1989
    Assignee: Owens-Illinois Plastic Products Inc.
    Inventors: Prakash R. Ajmera, Saleh A. Jabarin
  • Patent number: 4726756
    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.
    Type: Grant
    Filed: May 21, 1985
    Date of Patent: February 23, 1988
    Inventor: Katashi Aoki
  • Patent number: 4657502
    Abstract: A method for manufacturing hollow bodies from thermoplastic material by making hollow body-shaped preforms provided with opening nipples, which during a subsequent processing operation are reduced to the final shape after converting at least a part of their wall into deformable condition, whereby the forming-out takes place in at least two stages.
    Type: Grant
    Filed: April 18, 1984
    Date of Patent: April 14, 1987
    Assignee: C.F. Spiess & Sohn Kunststoffwerk GmbH & Co.
    Inventor: Theo Rydmann
  • Patent number: 4650627
    Abstract: Expanding the parison while the mold side parts defining the walls of the blow-molding chamber, one part per wall, are moved to mold closed positions causes flash to be pinched between each mold part and provides good wall thickness near the edges of the final product.
    Type: Grant
    Filed: April 30, 1985
    Date of Patent: March 17, 1987
    Assignee: Phillips Petroleum Company
    Inventor: Donald L. Peters
  • Patent number: 4584158
    Abstract: A method and a device for production of a temperature-stable, biaxially oriented container of thermoplastic material. In a first moulding stage a blank (40) is placed in a blow mould (12) after which a mandrel (15) extends the blank in its axial direction to a length exceeding the axial length of the future container. The length of the stretched material, in an axial section through the stretched blank, is then reduced at a predetermined temperature, and the reduction being made to a profile length substantially agreeing with the profile length for corresponding material portions in an axial section through the future container. In a second moulding stage the stretched blank is expanded to abut against the walls of the mould. The expansion takes place at a point in time for and/or at a speed allowing the reduction of the length of the stretched material, due to shrinkage to have time to be concluded before the material comes into contact with the walls of the mould.
    Type: Grant
    Filed: March 7, 1984
    Date of Patent: April 22, 1986
    Assignee: Petainer S.A.
    Inventors: Claes T. Nilsson, Kjell M. Jakobsen
  • Patent number: 4550009
    Abstract: A blow-molded thermoplastic body is made by a method which comprises the following steps: inflating a hollow parison within a mold cavity for causing the parison to expand and conform to inner wall surfaces defining the mold cavity, whereby the blow-molded body is shaped; further inflating the blow-molded body within the mold cavity for causing a wall portion of the body to expand beyond the mold cavity into a port cavity communicating with the mold cavity thereby reducing the thickness of the wall portion; applying a counter pressure on an outer face of the wall portion for moving the wall portion back in the direction of the mold cavity against an inflating pressure prevailing within the blow-molded body, whereby connecting portions attaching the wall portion to the blow-molded body are reduced in thickness; and discontinuing the application of the counter pressure for allowing the wall portion to be driven anew away from the mold cavity into the port cavity by the inflating pressure.
    Type: Grant
    Filed: February 22, 1984
    Date of Patent: October 29, 1985
    Assignee: REHAU Plastiks AG & Co.
    Inventor: Heinz Burkel
  • Patent number: 4510116
    Abstract: In blow molding an article with a reverse fold, a profiled bar is positioned where the parting line of the mold is to be when the mold is closed. The bar provides a reverse fold in the plastic article during a pre-blow step. In operation, a pre-pinched parison is formed adjacent the bar and as the mold begins to close a small amount of pre-blow air is introduced into the parison folding it against and over the bar. After the mold is closed, blow air is introduced to form the part. A complex part with good wall distribution of material can be obtained by this method.
    Type: Grant
    Filed: July 27, 1983
    Date of Patent: April 9, 1985
    Assignee: Phillips Petroleum Company
    Inventors: Donald L. Peters, John R. Rathman, Irvin L. Sumpter
  • Patent number: 4505664
    Abstract: A machine particularly useful for the blow molding of large thermoplastic articles such as cylindrical drums comprises a plurality of stations through which mold cavities are successively advanced. At a first station, containing a cart-mounted blow assembly an article is blow molded to substantially its final form in a cavity with the blow medium being introduced via a blow pin assembly operatively associated with the cavity after the blow assembly has been operatively engaged with the blow pin assembly. After the blowing operation has been completed, the blow assembly is operatively disengaged from the blow pin assembly and the cavity with the blown article is transported in a second station, the blow pin assembly traveling with the cavity. At the second station, an auxiliary blow assembly is operatively engaged with the blow pin assembly to circulate medium through the interior of the article.
    Type: Grant
    Filed: December 13, 1983
    Date of Patent: March 19, 1985
    Assignee: Hoover Universal, Inc.
    Inventor: Walter J. Craig
  • Patent number: 4493633
    Abstract: Apparatus for moulding an article (11) of thermoplastic material from a parison (10) in which certain parts (17,16) of the parison are re-formed while other parts (13,12,20) retain their shape. A difference in pressure is applied to the wall of the parison during the re-forming process. Material in the parison is also moved in the direction of those parts of the parison which are to be re-formed, whereby attenuation of the material may be avoided entirely, if so desired, also in those parts which are to be re-formed. The invention enables the parison for a bottle to be re-formed to an extent which is small by comparison with the thickness of the material, for example the so-called "neck support" ring and the so-called "pilfer proof" ring, starting with a tube of oriented material. In a device for the application of the invention the elements (22,21,25) are in contact with the parts (13,12,20) of the parison.
    Type: Grant
    Filed: January 14, 1983
    Date of Patent: January 15, 1985
    Assignee: PLM Aktiebolag
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson, Lars G. Larsson
  • Patent number: 4488863
    Abstract: This relates to the supplying of blow molding gas to a blow molding system. Most particularly, this relates to a blow molding gas supply which includes a low pressure supply and a high pressure supply and wherein the high pressure blowing gas of the molding operation is used to replenish the low pressure supply, thereby eliminating the presently required separate outside supply.
    Type: Grant
    Filed: February 23, 1981
    Date of Patent: December 18, 1984
    Assignee: The Continental Group, Inc.
    Inventor: Wayne N. Collette