EP0805769B1 - Aufblasbares kissen und verfahren zur herstellung - Google Patents

Aufblasbares kissen und verfahren zur herstellung Download PDF

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Publication number
EP0805769B1
EP0805769B1 EP95906349A EP95906349A EP0805769B1 EP 0805769 B1 EP0805769 B1 EP 0805769B1 EP 95906349 A EP95906349 A EP 95906349A EP 95906349 A EP95906349 A EP 95906349A EP 0805769 B1 EP0805769 B1 EP 0805769B1
Authority
EP
European Patent Office
Prior art keywords
flexible
conduit
aperture
inflation valve
inflation
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP95906349A
Other languages
English (en)
French (fr)
Other versions
EP0805769A1 (de
Inventor
Timothy Scott Dennison
Michel Pozzo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sealed Air Corp
Original Assignee
Sealed Air Corp
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 Sealed Air Corp filed Critical Sealed Air Corp
Priority to AT95906349T priority Critical patent/ATE169883T1/de
Publication of EP0805769A1 publication Critical patent/EP0805769A1/de
Application granted granted Critical
Publication of EP0805769B1 publication Critical patent/EP0805769B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/14—Valve bags, i.e. with valves for filling
    • B65D31/147—Valve bags, i.e. with valves for filling the filling port being provided in a side wall
    • 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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
    • B65D81/05—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents
    • 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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
    • B65D81/05—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents
    • B65D81/051—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using pillow-like elements filled with cushioning material, e.g. elastic foam, fabric
    • B65D81/052—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using pillow-like elements filled with cushioning material, e.g. elastic foam, fabric filled with fluid, e.g. inflatable elements

Definitions

  • the present invention relates to an inflatable cushion including a pair of flexible walls welded together at their edges, an inflation valve including a pair of flexible sheets welded together along two weld lines, said inflation valve being affixed to an internal face of one of said flexible walls by a welding line at a distance from said welded edges of said cushion, and opening to the outside of said cushion through an aperture provided in said one flexible wall to which said inflation valve is affixed to permit inflation of the cushion by insertion of an inflation tube or by a directed jet of air, said welding line surrounding said aperture and welding said one flexible wall and a first flexible sheet being adjacent thereto together.
  • Such an inflatable cushion may be used advantageously for packing articles of different dimensions and shapes by wedging same in a rigid box.
  • An inflatable cushion is already known from FR 2 686 322, in which the inflation walve located between two flexible walls forming the cushion is welded at: one of its ends to the two flexible walls at their edges, leaving an aperture of the conduit open to the outside for insertion of an inflation tube.
  • This known inflatable cushion comprises two flexible guide tabs that are needed for insertion of an inflation tube into the conduit. These flexible guide tabs project from one edge of the cushion and are welded at inflation valve to the edges of the flexible walls forming the cushion.
  • an inflation tube be inserted into the interior of the conduit of the inflation valve of this known cushion.
  • To insert such an inflation tube it is necessary to first spread the flexible guide tabs.
  • the insertion of the inflation tube into the cushion, via the conduit of the inflation valve, for inflating or deflating it produces at the level of the opening to the outside of the conduit of the valve a tension, which acts upon the welded edges of the flexible cushion walls, this tension being capable of causing the edges to tear at this level.
  • the inflation valve of this cushion can be positioned only on one edge of the latter, which is sometimes difficult to realize, when the cushion has a complex shape, and which can become a disadvantage in the conception of a package with an inflatable cushion.
  • Another inflatable cushion is known from GB-A-1093212 in which the inflation valve comprises a pair of flexible plastic panels, one of which being welded to the inner face of one of the two flexible walls of the inflatable cushion, while the other one of said pair of flexible plastic panels being formed from a material which melts at a temperature higher than that of said wall or said one panel.
  • the panels of the inflation valve are welded together at three of their edges, defining one open end.
  • the manufacture of this known inflatable cushion requires at least two kinds of material due to the different melting temperatures, resulting in increased costs for purchasing and storing. Moreover severals welding lines are necessary for sealing one end of the inflation valve and for affixing it to an internal face of one of the flexible walls of the inflatable cushion.
  • an object of the present invention is to provide an inflatable cushion of the above-mentioned kind, the manufacture of which is less complicated and less expensive.
  • the present invention proposes a new inflatable cushion in which the inflation valve is located such that the inflation tube could be automatically inserted into the interior of the inflatable cushion without producing tension upon the welded edges of the flexible cushion walls.
  • the above problem is solved in that said two weld lines form a conduit open at both ends and that said welding line covers said two weld lines and includes outside the conduit the second flexible sheet.
  • the aperture provided in said flexible wall to which said inflation walve is affixed is placed in the appropriate region of said flexible wall.
  • said aperture in said one flexible wall to which said inflation wall is affixed is located in an angle region of said cushion.
  • FIG 1 Shown in Figure 1 is an inflatable cushion comprising two walls 10 of a hot or high-frequency weldable, flexible plastic, which are welded together at their edges along a weld line 12 defining the peripheral edge of the cushion.
  • This inflatable cushion comprises an inflation valve 20 consisting of two sheets 21, 22 of a hot or high-frequency weldable, flexible plastic (see Figures 2, 3), which are welded together along two essentially parallel weld lines 24, so as to form a conduit 23 for an inflation tube 30 that is open at both ends.
  • the inflation valve 20 is welded to one internal face of one of flexible cushion walls 10, at a distance from weld line 12 of the cushion, and opens to the outside of the latter through an aperture 11 which is provided in flexible wall 10, to which valve 20 is welded.
  • the weld seam 13 of inflation valve 20 on the flexible cushion wall 10 describes a circle, which surrounds aperture 11 that is provided in flexible wall 10, leaving flexible sheets 21, 22 of inflation valve 20 open at the level of conduit 23, so as to permit the insertion of an inflation tube 30 into the interior of the cushion through aperture 11 and conduit 23.
  • FIG. 2 Shown in Figure 2 is a first embodiment of an inflation valve 20.
  • the flexible sheets 21, 22 forming the inflation valve 20 are of different lengths.
  • These sheets 21, 22 are arranged side by side and welded together along weld lines 24, so that at one end of conduit 23 of inflation valve 20, the transverse edges 21a, 22a of flexible sheets 21, 22 are offset from one another in the axial direction of the valve. At the other end, the edges 21b, 22b of sheets 21,22 overlie one another.
  • This inflation valve is positioned in the interior of the inflatable cushion (see Figure 1), so that the flexible sheet 22 of inflation valve 20 with its edge 22a set back from edge 21a of the other flexible sheet 21, is positioned adjacent to the internal face of flexible cushion wall 10, to which the inflation valve is affixed, the offset edge 22a being adjacent to an edge of aperture 11 that is provided in said flexible wall 10.
  • the weld seam 13 of inflation valve 20 on wall 10 is such that on one portion of circle 13a, wall 10 and sheet 21 including forward edge 21a are welded together, that on two portions of circle 13b arranged on both sides of conduit 23, flexible wall 10 and thin sheets 21, 22 are welded together, and that over the width 13c of conduit 23, only wall 10 and adjacent sheet 22 are welded together, while leaving the other sheet 21 forming the valve detached, so as leave the conduit open.
  • the resist 26 may be made in the form of an individual tab of silicon or even paper. In this instance, the resist 26 is pulled out of conduit 23 through aperture 11 in flexible wall 10, after the welding step (c) of the foregoing process.
  • the resist 26 is formed by printing an insulating material, such as, for example, a fast-drying varnish, on one of the opposite internal faces of sheets 21, 22 forming the inflation valve. This printing occurs in step (a) of the above-described method.
  • this resist 26 allows, in an advantageous manner, to leave the two sheets 21, 22 of the valve separated from one another at conduit 23, so as to thus permit the insertion of a flexible inflation tube into the interior of this valve.
  • valve 20 is such that a directed let of air from an air nozzle (not shown) can be aimed at the outer end of the conduit 23 and this jet of air will open the conduit 23 and inflate the cushion without the necessity of inserting an inflation tube into the conduit 23.
  • This feature permits automatic inflation or very fast manual inflation.
  • FIG. 3 Shown in Figure 3 is another embodiment of an inflation valve of the inflatable cushion in accordance with the invention.
  • the flexible sheets 21, 22 forming this valve have the same dimensions. These sheets 21, 22 are superposed and welded together along welding lines 24, so as to form conduit 23.
  • One of these flexible sheets 22 includes here a circular opening 25, which is located at one end of conduit 23 between the two welding lines 24.
  • This inflation valve is located in the interior of the flexible cushion in accordance with the invention, so that flexible sheet 22 with opening 25 is adjacent to the internal face of flexible wall 10, to which the inflation valve is attached, with opening 25 being opposite aperture 11 provided in flexible wall 10.
  • the thin sheets 21, 22 and flexible wall 10 are welded along a circular portion surrounding the two overlaid apertures 11, 25, and covering the two welding lines 24 that form conduit 23.
  • conduit 23 only the flexible wall 10 and thin wall 22 adjacent to the inflation valve are welded together, whereas the other thin sheet 21 remains detached, so that an inflation tube 30 can be inserted or a directed air jet can pass therethrough.
  • a common characteristic of the inflation valves shown in Figures 2 and 3 is that the welding lines 24 of flexible sheets 21, 22 are locally spaced apart from one another, so that the conduit 23 of flexible inflation tube 30 that is created by welding lines 24 has a widening, which is located at a distance from the free end of the conduit placed in the interior of the cushion.
  • the inflatable cushion of this invention has advantageously a double seal at aperture 11 in flexible wall 10.
  • a first seal is formed by the valve itself, which is self-closing by the two flexible sheets 21, 22 overlying one another.
  • a second seal is ensured by sealingly applying flexible sheet 21 of the inflation valve, which is outermost with respect to flexible wall 10, to aperture 11, so as to obstruct same.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Buffer Packaging (AREA)
  • Check Valves (AREA)
  • Bag Frames (AREA)

Claims (8)

  1. Aufblasbares Kissen mit einem Paar flexibler Wände (10), die an ihren Rändern (12) zusammengeschweißt sind, und mit einem Aufblasventil (20), das ein Paar flexibler Folien (21, 22) aufweist, die längs zweier Schweißlinien (24) zusammengeschweißt sind, und das (20) an einer Innenseite einer der flexiblen Wände durch eine Schweißnahtlinie (13) in einem Abstand von den geschweißten Rändern (12) des Kissens befestigt ist und zur Außenseite des Kissens durch eine Öffnung (11) öffnet, die in der besagten einen flexiblen Wand (10), an der das Aufblasventil befestigt ist, ausgebildet ist, um ein Aufblasen des Kissens durch Einsetzen eines Aufblasrohrs oder durch einen gerichteten Luftstrahl zu ermöglichen, wobei die Schweißnahtlinie (13) die Öffnung (11) umgibt und die besagte eine flexible Wand und eine an dieser anliegende, erste flexible Folie (22) zusammenschweißt, dadurch gekennzeichnet, daß die zwei Schweißlinien (24) einen an beiden Enden offenen Kanal (23) ausbilden, wobei eines der Enden mit der Öffnung (11) in Verbindung steht, und daß die Schweißnahtlinie (13) die zwei Schweißlinien (24) überdeckt und außerhalb des Kanals (23) die zweite flexible Folie (21) mit enthält.
  2. Aufblasbares Kissen nach Anspruch 1, dadurch gekennzeichnet, daß an einem Ende des Kanals (23) des Aufblasventils (20) die querverlaufenden Ränder (21a, 22a) der flexiblen Folien (21, 22), die das Ventil ausbilden, gegeneinander versetzt sind, wobei die flexible Folie (22), die den inneren Rand (22a) aufweist, an der Innenseite der besagten einen flexiblen Wand liegt, an der das Aublasventil (20) befestigt ist, und wobei der innere Rand in der Nähe des Randes der Öffnung (11) angeordnet ist, die in der besagten einen flexiblen Wand (10) ausgebildet ist.
  3. Aufblasbares Kissen nach Anspruch 1, dadurch gekennzeichnet, daß das Aufblasventil (20) eine Öffnung (25) aufweist, die in einer der flexiblen Folien (22) ausgebildet ist, die an der Innenseite der besagten einen flexiblen Wand (10) liegt, an der das Aufblasventil befestigt ist, wobei die Öffnung (25) an einem Ende des Kanals (23) zwischen den den Kanal bildenden Schweißlinien (24) angeordnet und der Öffnung (11) zugewandt ist, die in der besagten einen flexiblen Wand (10) ausgebildet ist, an der das Aufblasventil (20) befestigt ist.
  4. Aufblasbares Kissen nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Öffnung in der besagten einen flexiblen Wand, an der das Aufblasventil befestigt ist, in einem Eckbereich des Kissens angeordnet ist.
  5. Aufblasbares Kissen nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß es im aufgeblasenen Zustand an der in der besagten einen flexiblen Wand (10) ausgebildeten Öffnung (11) eine erste Dichtung, die durch das gegenseitige Aneinanderliegen des Paars flexibler Folien (21, 22) des Aufblasventils ausgebildet ist, und eine zweite Dichtung bildet, die durch das Anliegen einer der flexiblen Folien des Aufblasventils an der Öffnung (11) ausgebildet ist, so daß diese versperrt ist.
  6. Verfahren zur Herstellung eines aufblasbaren Kissens nach Anspruch 2, wobei
    a) die flexiblen Wände (10), die aneinanderliegend angeordnet sind, längs des Umfangs zusammengeschweißt werden,
    b) die flexiblen Folien (21, 22) längs zweier Schweißlinien (24) zusammengeschweißt werden, um ein Aufblasventil (20) zu bilden, daß einen an beiden Enden offenen Kanal (23) aufweist,
    c) ein Unterbrechungsteil (26) in dem Kanal (23) des Aufblasventils (20) an dem Ende des Kanals (23) vorgesehen wird, das den versetzten querverlaufenden Rändern (21a, 22a) der flexiblen Folien (21, 22) entspricht.
    d) das Aufblasventil (20) an der Innenseite einer der flexiblen Wände (10), die mit einer Öffnung (11) versehen ist, derart angeordnet wird, daß die flexible Folie (22) des Ventils, die den inneren Rand (22a) aufweist, an der Innenseite der flexiblen Wand (10) anliegt, und daß das offene Ende des Kanals (23), das den inneren Rand (22a) und das Unterbrechungsteil (26) aufweist, an der Öffnung (11) liegt und mit dieser in Verbindung steht,
    e) das Aufblasventil (20) an die flexible Wand (10) längs einer Schweißnahtlinie (13) angeschweißt wird, die die Öffnung (11) der flexiblen Wand (10) umschließt und sich quer über das Unterbrechungsteil (26) erstreckt und in die (13) außerhalb des Kanals (23) die zweite flexible Folie (21) mit aufgenommen ist, wobei das Unterbrechungsteil (26) innerhalb des Kanals (23) ein Zusammenschweißen der zwei flexiblen Folien (21, 22) verhindert.
  7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß das Unterbrechungsteil (26) aus einer einzelnen Lasche aus einem Isoliermaterial hergestellt wird und daß es ferner einen letzten Schritt des Herausziehens des Unterbrechungsteils (26) aus dem Kanal (23) über die Öffnung (11) der flexiblen Wand (10) aufweist.
  8. Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß der Schritt a) ferner das Drucken eines Isoliermaterials auf eine der einander gegenüberliegenden Innenseiten der flexiblen, das Aufblasventil (20) bildenden Folien (21, 22) an dem Ende des Kanals (23) aufweist, das den versetzten querverlaufenden Rändern (21a, 22a) entspricht, um das Unterbrechungsteil (26) auszubilden.
EP95906349A 1995-01-25 1995-01-25 Aufblasbares kissen und verfahren zur herstellung Expired - Lifetime EP0805769B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT95906349T ATE169883T1 (de) 1995-01-25 1995-01-25 Aufblasbares kissen und verfahren zur herstellung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1995/000271 WO1996022926A1 (en) 1995-01-25 1995-01-25 Inflatable cushion and method of making same

Publications (2)

Publication Number Publication Date
EP0805769A1 EP0805769A1 (de) 1997-11-12
EP0805769B1 true EP0805769B1 (de) 1998-08-19

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ID=8165946

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95906349A Expired - Lifetime EP0805769B1 (de) 1995-01-25 1995-01-25 Aufblasbares kissen und verfahren zur herstellung

Country Status (7)

Country Link
EP (1) EP0805769B1 (de)
JP (1) JPH11504885A (de)
KR (1) KR19980701677A (de)
AU (1) AU690195B2 (de)
DE (1) DE69504212D1 (de)
FI (1) FI973103L (de)
WO (1) WO1996022926A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6789376B1 (en) 1999-09-22 2004-09-14 Pactiv Corporation Method and machine for the manufacture of air pillows
US6932134B2 (en) 2003-02-07 2005-08-23 Pactiv Corporation Devices and methods for manufacturing packaging materials
US8627637B2 (en) 1999-09-22 2014-01-14 Pregis Innovative Packaging, Inc. Method and machine for the manufacture of air pillows
US8906478B2 (en) 2005-05-06 2014-12-09 Pregis Innovative Packaging, Inc. Films for inflatable cushions

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5727370A (en) * 1996-06-21 1998-03-17 Flexible Products Co Apparatus and method for producing foam cushions utilizing flexible foam mixing chamber
US5901850A (en) * 1996-10-04 1999-05-11 Impackt, L.L.C. Inflatable packaging assembly
US5862914A (en) * 1996-11-25 1999-01-26 Sealed Air Corporation Inflatable package for protecting an article
US5830780A (en) * 1996-11-26 1998-11-03 Sealed Air Corporation Self-closing valve structure
US6520332B1 (en) 1999-11-10 2003-02-18 Cryovac, Inc. Packaging cushion and packaging assemblies incorporating same
US6398029B1 (en) 2000-03-17 2002-06-04 Sealed Air Corporation (Us) Packaging cushion and packaging assemblies incorporating same
USRE43327E1 (en) 2001-01-08 2012-04-24 Aminex Therapeutics, Inc. Hydrophobic polyamine analogs and methods for their use
KR100491204B1 (ko) * 2005-02-12 2005-05-24 우찌다히로후미 주입식 완충포장재 및 제조방법
HUE052620T2 (hu) 2016-03-25 2021-05-28 Aminex Therapeutics Inc Biológiailag hozzáférhetõ poliaminok
CN106672434A (zh) * 2017-03-07 2017-05-17 中山市丰申电器有限公司 一种包装盒
WO2022072586A1 (en) 2020-09-30 2022-04-07 Aminex Therapeutics, Inc. Combination drug substance of polyamine transport inhibitor and dfmo

Family Cites Families (2)

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Publication number Priority date Publication date Assignee Title
DE1486391A1 (de) * 1964-08-26 1969-12-18 Psg Plastik Sack Gmbh Kissenfoermiger Kunststoff-Ventilsack
US3268152A (en) * 1964-11-27 1966-08-23 Thermoplastic Ind Inc Self-sealing valve bag

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6789376B1 (en) 1999-09-22 2004-09-14 Pactiv Corporation Method and machine for the manufacture of air pillows
US8627637B2 (en) 1999-09-22 2014-01-14 Pregis Innovative Packaging, Inc. Method and machine for the manufacture of air pillows
US6932134B2 (en) 2003-02-07 2005-08-23 Pactiv Corporation Devices and methods for manufacturing packaging materials
US7347911B2 (en) 2003-02-07 2008-03-25 Pregis Innovative Packaging Inc. Devices and methods for manufacturing packaging materials
US8906478B2 (en) 2005-05-06 2014-12-09 Pregis Innovative Packaging, Inc. Films for inflatable cushions

Also Published As

Publication number Publication date
AU1456795A (en) 1996-08-14
AU690195B2 (en) 1998-04-23
JPH11504885A (ja) 1999-05-11
WO1996022926A1 (en) 1996-08-01
KR19980701677A (ko) 1998-06-25
FI973103A7 (fi) 1997-09-24
EP0805769A1 (de) 1997-11-12
DE69504212D1 (de) 1998-09-24
FI973103A0 (fi) 1997-07-24
FI973103L (fi) 1997-09-24

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