WO2006054089A1 - Procede et agencement pour former un conteneur ayant une paroi interne et conteneur ayant une paroi interne - Google Patents

Procede et agencement pour former un conteneur ayant une paroi interne et conteneur ayant une paroi interne Download PDF

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Publication number
WO2006054089A1
WO2006054089A1 PCT/GB2005/004441 GB2005004441W WO2006054089A1 WO 2006054089 A1 WO2006054089 A1 WO 2006054089A1 GB 2005004441 W GB2005004441 W GB 2005004441W WO 2006054089 A1 WO2006054089 A1 WO 2006054089A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
pin
die
plastics material
slot
Prior art date
Application number
PCT/GB2005/004441
Other languages
English (en)
Inventor
David Alan Gilbert White
Paul Dean
Steve Davis
Original Assignee
Polimoon Packaging Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Polimoon Packaging Limited filed Critical Polimoon Packaging Limited
Priority to EP05813703A priority Critical patent/EP1824658A1/fr
Publication of WO2006054089A1 publication Critical patent/WO2006054089A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/04—Multi-cavity bottles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/11—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels comprising two or more partially or fully enclosed cavities, e.g. honeycomb-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/04—Extrusion blow-moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/58—Blowing means
    • B29C2049/5837—Plural independent blowing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/075—Preforms or parisons characterised by their configuration having at least one internal separating wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/04—Extrusion blow-moulding
    • B29C49/04116—Extrusion blow-moulding characterised by the die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/065—HDPE, i.e. high density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/06—PVC, i.e. polyvinylchloride
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/60—Multitubular or multicompartmented articles, e.g. honeycomb

Definitions

  • the present invention relates to a container and in particular to a container comprising two or more cavities.
  • a method of forming a container comprising the steps of: forming an assembly comprising a pin received within a die, the pin comprising a slot extending partially along the pin; inserting molten plastics material into the aperture formed between the pin and the die, the molten plastics material being inserted under pressure such that a portion of the plastics material is impelled into the slot of the pin; causing the plastics material to conform to the shape of the die; transferring the plastic material from the die to a mould; and applying a source of pressurised gas to a portion of the plastic material to form a container, wherein the plastics material impelled into the slot of the pin forms a wall within the container to form two or more separate container regions.
  • a container comprising an internal wall, the internal wall forming at least two separate container regions within the container.
  • the upper limit to the total number will be determined by the size of the container (larger containers becoming necessary if several regions are required) and the area of the top of the container as this surface must accommodate the required number of apertures.
  • the container regions may be of different volumes or of similar volumes. For instance, there may be two regions of substantially equal volume, or a first large region and a second smaller region. This embodiment would be of use where one of the components to be stored within the container is required in a smaller volume than the second. Alternatively, there may be three or more container regions of equal or differing sizes.
  • each container region has at least one aperture to facilitate filling of the bottle and dispensing therefrom.
  • there will be two apertures each of the apertures being associated with each of two separate container regions.
  • the container may be made from any material which is both extrudable and plastically deformable. However, it is preferred that the container be formed from a plastics material, for example polypropylene, polyethylene or polyvinylchloride .
  • the parison may be annular, ellipsoid or oval.
  • the gap between the pin and die will be annular, resulting in the production of an annular parison.
  • the container may have any shape into which it is possible to make a blow mould.
  • the container may have, for example, different cross-sectional configurations (e.g. round, square, circular, elliptical, non-uniform); a height which is either greater or smaller than the width and/or depth; tapering to produce cones, pyramids, tetrahedrons or frusto-conical configurations; stepping between different cross-sectional areas; or rotation of the cross-section smoothly around the central vertical axis to produce a 'twisted' appearance to the outer surface of the container.
  • different cross-sectional configurations e.g. round, square, circular, elliptical, non-uniform
  • a height which is either greater or smaller than the width and/or depth
  • tapering to produce cones, pyramids, tetrahedrons or frusto-conical configurations stepping between different cross-sectional areas
  • an arrangement for forming a container comprising a pin located within a die, the pin comprising a slot extending into the pin and partially along the height of the pin; and the pin being received within the die such that the pin is separated from the die by a second annular gap.
  • the slot in the pin may be such that a single internal wall will form in the parison. Where a single internal wall is to be formed, the slot extends across the width of a lower portion of the pin so that the pin comprises a linear slot extending partially along the pin and parallel to the major axis of the pin and the die.
  • the pin may comprise a central member received within a peripheral member, the central member of the pin comprising a slot extending across the width of the pin.
  • the central member and the peripheral member may be a single component.
  • the slot or slots may be arranged so that they do not extend across the entire width of the pin, but meet in the interior of the pin to form a parison incorporating segments which may be equally or differently sized. Accordingly, there may be any number of segments, providing the container is large enough to accommodate these. Preferably, there will be between two and six container regions, more preferably two or three, most preferably two container regions.
  • a method of forming a container comprising the steps of: forming an assembly comprising a pin received within a die, the pin comprising a linear slot extending partially along the pin and parallel to the major axis of the pin and the die; inserting molten plastics material into the aperture formed between the pin and the die, the molten plastics material being inserted under pressure such that a portion of the plastics material is impelled into the slot of the pin; causing the plastics material to conform to the shape of the die; transferring the plastic material from the die to a mould; and applying a source of pressurised gas to a portion of the plastic material to form a container, wherein the plastics material impelled into the slot of the pin forms a wall within the container to form two separate container regions.
  • a container comprising an internal wall, the internal wall forming two separate container regions within the container.
  • an arrangement for forming a container comprising a pin located within a die, the pin comprising a central member received within a peripheral member, the central member of the pin comprising a slot extending across the width of the pin and partially along the height of the pin; and the pin being received within the die such that the pin is separated from the die by a second annular gap.
  • Figure 1 shows a first view of a schematic depiction of an assembly for use in accordance with the present invention
  • Figure 2 shows a second view of a schematic depiction of an assembly for use in accordance with, the present invention, the second view being perpendicular to the first view shown in Figure 1 ;
  • FIGS 3 a to 3e show a schematic depiction of an assembly for use in accordance with the present invention; the views being through sections A-A to E- E of Figure 2; and
  • Figures 4a to 4d shows a schematic depiction of a container made according to the method of the present invention.
  • reference to 'up', 'down', 'upper', 'lower', 'vertical', 'horizontal', 'top', 'bottom' and related terms refers to the orientation that the components of the apparatus adopt when in normal use, as they are shown in the figures.
  • Figure 1 shows a first view of a schematic depiction of an assembly 10 for use in accordance with the present invention.
  • the assembly 10 comprises pin 20 which is received within die 30.
  • Pin 20 comprises a central member 22 which is received centrally within annular member 24.
  • the central member 22 comprises a slot 25 that extends across the width of the lower portion of the central member 22 of the pin 20, but only for a portion of the height of the central member 22.
  • the pin 20 further comprises first and second passages 27, 28 that extend along the length of the central member 22. The first and second passages 27, 28 are located on either side of the slot 25.
  • the die 30 comprises an annular member 32 and the pin 20 is received within the die 30 such that there is an annular gap 33 between the annular member 24 of the pin 20 and the annular member 32 of the die 30.
  • Both the pin 20 and die 30 are metallic.
  • the parison 45 is polypropylene.
  • the pin 20 is of one piece construction with first and second passages 27, 28 passing through and extending along the length of the pin 20.
  • annular member 24 are one component (the 'pin' 20) and the first and second passages 27, 28 are aligned with each other in the diametrical plane of the pin 20.
  • the slot 25 comprises, at the top of the pin 20, two graduated slots 31 at diametrically opposing points around the annular surface of pin 20.
  • the slots 31 become increasingly elongate as shown in Figure 2 and Figures 3 a - 3e, from the top to the bottom along the length of the pin 20.
  • the slots 31 meet to form a single slot 25.
  • the slot 25 extends across the width of the pin 20 allowing the formation of a single bisecting internal wall 130 in the parison 45 (this internal wall 130 becoming the internal wall 130 of the container 100 upon moulding).
  • the mould is positioned, in this embodiment, below the die 30 so that the extruded parison 45 can pass from the die 30 into the mould for subsequent blow moulding.
  • the assembly is used in a modified extrusion process, wherein molten plastic is extruded through the assembly 10.
  • the molten plastic is forced under pressure into the annular gap 33 between pin 20 and die 30 from the top of the pin 20 and die 30 arrangement to produce a tube 40 that adopts the shape of the aperture formed between the pin 20 and the die 30.
  • This rube 40 is then extruded out of the bottom of the pin 20 and die 30 arrangement and transferred into a mould.
  • Pressurised gas is used to force the molten plastics material against the interior of the mould, such that the plastics material takes on the shape of the mould.
  • pressurised gas may be passed through first and second passages 27, 28 to reduce the possibility that the tube 40 collapses or separates from the wall of the die 30.
  • Passage 27 supplies air into a space on a first side of the internal wall 130 of the parison 45 and a second passage 28 supplies air into a space on a second side of the internal wall 130 of the parison 45.
  • molten plastics material e.g. polypropylene
  • the polymer mainly remains within the annular gap 33 and a relatively small amount flows into the slot 25 in the central member 22. If a container 100 comprising a continuous internal wall 130 is to be formed then it is imperative that the slot 25 in the pin 20 is filled with a polymer material.
  • the slot 25 can be suitably filled by reducing the gap 35 on the end face, so that the pressure typically exerted on the plastics material by the extrusion process forces a portion of the plastics material into the slot 25 such that the slot 25 is filled. This causes a tube 40 to be formed having a membrane 130 across its middle.
  • parison 45 is severed from the continuous extrusion using a knife (not shown), the length is greater than the length of the mould cavity to ensure that when the mould is closed the bottom of the mould grips the distal end of the parison 45, sealing this end so that blow moulding forms a sealed base of the container 100.
  • the proximal end of the parison 45 is gripped by the upper edge of the mould cavity, so that an upper surface of the container 100 will be formed.
  • gaps occur in the sealed parison 45 at the portion of the mould that forms the apertures 115 of the container
  • a container 100 can then be formed from this parison 45 using conventional blown extrusion moulding techniques.
  • the size of the gap 35 can be determined through experimentation and may vary with the material being used and the weight and the size of the container 100 to be formed. It has been found that the cross-sectional area of the gap 35 should be substantially equal to that of the slot 25.
  • Figure 2 shows a second view of a schematic depiction of an assembly for use in accordance with the present invention, the second view being perpendicular to the first view, shown in Figure 1.
  • Figure 2 shows in particular a cross-section through the middle of the central member 22 of the pin 20.
  • This central member 22 of the pin 20, which defines the shape of the slot 25 formed within the pin 20, has a V- shape 26.
  • Figure 4 shows a schematic depiction of a container 100 made according to the method of the present invention, as described above.
  • Figure 4a shows a front view of the container 100.
  • Figure 4b shows a side view of the container 100.
  • Figure 4c shows a top view of the container 100 and
  • Figure 4d shows an underside view of the container 100.
  • the container 100 comprises two container regions 110 and 120 which are separated by internal wall 130.
  • Each of the container regions HO 5 120 has an associated aperture 115, 125 through which the contents of each container region 110, 120 may be dispensed, hi use, a cap will be received on top of the container 100 that may allow the contents of each container region 110, 120 to be mixed together as they are dispensed from the container 100 or alternatively allows the contents to be dispensed separately.
  • Figure 4d shows that the two container regions 110, 120 are of substantially equal size, although it will be readily understood that the relative size of each container portion 110, 120 may be varied.
  • Figure 4d also shows that internal wall 130 takes the form of a straight line, essentially parallel to one of the axes of the container 100. It will be understood that the internal wall 130 may be provided at a different angle.
  • Figures 4a - 4d show that the container 100 (formed by the assembly of Figures 1 and 2) has a cross-section that is substantially rectangular with rounded-corners. It will be understood that other cross-sections may be used, for example square, circular elliptical, etc.
  • the container 100 may be formed from any material compatible with the blown extrusion moulding process, for example and without limitation, high density polyethylene, polyvinylchloride, polypropylene, etc.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Abstract

Conteneur (100) comprenant au moins deux régions de conteneur (110, 120), le conteneur (100) étant formé grâce à l'utilisation d'une cheville (20) comprenant une fente (25) lors d'un processus de moulage combiné d'extrusion-soufflage. La matière plastique formée dans la fente (25) sert à former la division entre les régions (110, 120) du conteneur (100).
PCT/GB2005/004441 2004-11-17 2005-11-17 Procede et agencement pour former un conteneur ayant une paroi interne et conteneur ayant une paroi interne WO2006054089A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05813703A EP1824658A1 (fr) 2004-11-17 2005-11-17 Procede et agencement pour former un conteneur ayant une paroi interne et conteneur ayant une paroi interne

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0425337A GB2420311A (en) 2004-11-17 2004-11-17 Method of making a container
GB0425337.3 2004-11-17

Publications (1)

Publication Number Publication Date
WO2006054089A1 true WO2006054089A1 (fr) 2006-05-26

Family

ID=33548429

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2005/004441 WO2006054089A1 (fr) 2004-11-17 2005-11-17 Procede et agencement pour former un conteneur ayant une paroi interne et conteneur ayant une paroi interne

Country Status (3)

Country Link
EP (1) EP1824658A1 (fr)
GB (1) GB2420311A (fr)
WO (1) WO2006054089A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1258792A (fr) * 1957-09-27 1961-04-14 Finaplax Perfectionnements apportés à la fabrication de bouteilles ou analogues en matière plastique
EP0623526A1 (fr) * 1993-05-06 1994-11-09 Conditionnement Aseptie Conseils " C.A.C." Récipient pour le transport et le mélange de produits quelconques
JPH09169327A (ja) * 1995-12-21 1997-06-30 Yoshino Kogyosho Co Ltd 双胴容器
US20020031625A1 (en) * 1994-07-25 2002-03-14 Sunpat L.L.C. Multiple neck spray bottle, multiple neck spray bottle dispenser, and method of making and using
US6602459B1 (en) * 2001-09-24 2003-08-05 Owens-Brockway Plastic Products Inc. Dual-chamber container, and method and apparatus for its manufacture
US6733273B1 (en) * 1999-06-09 2004-05-11 Bernd Hansen Device for producing extrusion blow-molded containers with at least two chambers

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2661871A (en) * 1950-04-17 1953-12-08 Alfred G Huenergardt Multiple liquid dispensing container
US3764250A (en) * 1971-11-01 1973-10-09 Graham Eng Corp Blow molding machine
GB2388097A (en) * 2002-04-23 2003-11-05 Grabor Plastics Ltd Aggregate container formed from separate parts

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1258792A (fr) * 1957-09-27 1961-04-14 Finaplax Perfectionnements apportés à la fabrication de bouteilles ou analogues en matière plastique
EP0623526A1 (fr) * 1993-05-06 1994-11-09 Conditionnement Aseptie Conseils " C.A.C." Récipient pour le transport et le mélange de produits quelconques
US20020031625A1 (en) * 1994-07-25 2002-03-14 Sunpat L.L.C. Multiple neck spray bottle, multiple neck spray bottle dispenser, and method of making and using
JPH09169327A (ja) * 1995-12-21 1997-06-30 Yoshino Kogyosho Co Ltd 双胴容器
US6733273B1 (en) * 1999-06-09 2004-05-11 Bernd Hansen Device for producing extrusion blow-molded containers with at least two chambers
US6602459B1 (en) * 2001-09-24 2003-08-05 Owens-Brockway Plastic Products Inc. Dual-chamber container, and method and apparatus for its manufacture

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 10 31 October 1997 (1997-10-31) *

Also Published As

Publication number Publication date
GB2420311A (en) 2006-05-24
GB0425337D0 (en) 2004-12-22
EP1824658A1 (fr) 2007-08-29

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