EP0567909B1 - Procédé pour appliquer un dispositif en creur à chambre fermée sur un rouleau encreur et dispositif pour sa mise en oeuvre - Google Patents

Procédé pour appliquer un dispositif en creur à chambre fermée sur un rouleau encreur et dispositif pour sa mise en oeuvre Download PDF

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Publication number
EP0567909B1
EP0567909B1 EP93106426A EP93106426A EP0567909B1 EP 0567909 B1 EP0567909 B1 EP 0567909B1 EP 93106426 A EP93106426 A EP 93106426A EP 93106426 A EP93106426 A EP 93106426A EP 0567909 B1 EP0567909 B1 EP 0567909B1
Authority
EP
European Patent Office
Prior art keywords
doctor
working
chamber
bar
inking roller
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
EP93106426A
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German (de)
English (en)
Other versions
EP0567909A1 (fr
Inventor
Georg Schneider
Wolfgang Reder
Dieter Reinhart
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.)
Koenig and Bauer AG
Original Assignee
Koenig and Bauer Albert AG
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 Koenig and Bauer Albert AG filed Critical Koenig and Bauer Albert AG
Publication of EP0567909A1 publication Critical patent/EP0567909A1/fr
Application granted granted Critical
Publication of EP0567909B1 publication Critical patent/EP0567909B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/027—Ink rail devices for inking ink rollers

Definitions

  • the invention relates to a method for adjusting a chamber doctor blade for an inking unit of a web-fed rotary printing press, to an ink-guiding roller, and a chamber doctor blade according to the preamble of claim 3.
  • doctor blades For chambered doctor blades, it is known to insert the doctor blades in a slot in order to ensure quick interchangeability. The wear of the working doctor blade compared to the closing doctor blade is greater.
  • EP 04 53 910 A1 shows a chambered doctor blade for one Anilox roller of a rotary printing press.
  • This chambered doctor blade is arranged on a doctor blade beam and provided with interchangeable doctor blades.
  • the doctor blades are set at a negative angle to the anilox roller.
  • the invention is based on the object of a method for increasing the service life of a doctor blade which can be adjusted at a negative angle of a chamber doctor blade on an ink-carrying roller, e.g. B. anilox roller to create, as well a device for performing the method.
  • a negatively positioned doctor blade e.g. B.
  • the squeegee of a squeegee beam carrying two squeegee blades can be easily placed on the ink-guiding roller at a distance from the squeegee working point and can then be moved against a force into a squeegee holder on its way to the squeegee working point.
  • This has a larger adjustable squeegee width, which increases the service life of the squeegee blades. A longer service life compared to conventional doctor blades is achieved with these negatively positioned doctor blades.
  • the doctor blades are turned at a negative angle, bending of the upper edge, i.
  • a resilient arrangement of the working squeegee ensures automatic tracking of the squeegee blade and thus also increases the service life of the squeegee, in particular the working squeegee. Another advantage is that the doctor blade wear can be displayed, so that it can be checked at any time when the doctor blade adjustment is finished.
  • Fig. 1 the front view of an anilox roller 1 is shown, which over the journal 2; 3 and camp 4; 6 on side frames 7; 8 is attached.
  • the doctor bars 9 to 13 each have an ink supply nozzle 14, which is connected via a flexible line, not shown, to an ink pump, not shown, and an ink reservoir.
  • the ink reservoir also not shown, can be funnel-shaped and at the same time serve as a collecting container for the doctored paint.
  • the doctor bars 9 and 11 are received by a holder 16, and the doctor bars 12 and 13 are received by a holder 17.
  • the brackets 16; 17 are fastened on a cross member 18 which is between the side frames 7; 8 is arranged.
  • Each bracket 16; 17 has four clamping and adjusting devices 19; 21 on, the pairs of doctor bars 9 to 13 via doctor blade holders 22; 23 are assigned.
  • a shaft 28 is arranged which carries a lever 29 which has a ball handle 31 at one end and an eccentric 32 at its other end.
  • the lever 29 is pivotally mounted through a bore in the eccentric 32.
  • the body 24 is in an axial direction of the doctor blade holder 22; 23 extending fitting screw 33 rotatably mounted in a blind hole 34.
  • the fitting screw 33 is surrounded by a sleeve 36, the outside diameter of which corresponds to the inside diameter of the blind hole 34.
  • the sleeve 36 has an annular groove 37 running on its circumference, into which the end of a clamping screw 38 engages.
  • Disc springs 41 are arranged between the head 39 of the fitting screw 33 and the end face of the sleeve 36.
  • the body 24 also has a guide rail 42 running in the axial direction of the fitting screw 33.
  • the doctor blade holders 22; 23 also each have one in the axial direction of the squeegee supports 22; 23 extending guide surface 43, each two transverse to the axial direction of the squeegee holders 22; Has 23 extending ribs.
  • the ribs 44; 46 have a wedge-shaped cross section and have a different width b 44 at the same height; b 46 on, ie they have a different slope S 44; S 46. The following applies: S 44> S 46.
  • the doctor bar 9 to 13 each consists of a two-part base body 47; 48, each in a doctor blade holder 49; 51 receives a spring-loaded working squeegee 52 or a closing squeegee 53.
  • a striking plate 54 each arranged on the end face of the squeegee bars 9 to 13, closes the chambered squeegee to form an open-topped container which can be adjusted to the anilox roller 1 moving in the direction of arrow D.
  • the working squeegee 52 is resiliently mounted, as later working squeegees 68 in FIGS. 7 and 8 are executed.
  • the two-part base body 47; 48 of the doctor bars 9 to 13 each have feet with transport edges 57; 58, which in the case of movement of the doctor bar in the direction of arrow C with the ribs 44; 46 come into active connection.
  • the base body 48 has a switching trough in the form of a blind hole 59 with a depression or bevel 61 running on one side in the direction of the transport edge 58.
  • the transport edges 57; 58 can be broken, d. H. beveled and have the same slope S 44, S 46 as the corresponding ribs 44; 46.
  • a pressure piece 63 which can be actuated against the force of a spring 62 in the axial direction of the squeegee bar holder 23. 2 in the direction of arrow C contact with a microswitch 64, which is connected via contact lugs 66 and connecting cable 67 to an electrical control, not shown, which switches the ink pump on when the pressure piece 63 is in the direction of the arrow C. 4 is in the position.
  • the distance e is the measure of the preload of the plate springs 41 with which the doctor bars 9 to 13 are clamped.
  • the working doctor blade 52 is positioned at an angle ⁇ to the vertical 56 of the tangent T to the anilox roller 1.
  • the vertical 56 corresponds to the radius r of the anilox roller 1.
  • the levers 29 are pivoted laterally outwards with the ball handles 31, see also the position of the squeegee bar 13 in FIG. 1, so that the doctor bar 13 on the two guide rails 42 can be moved out until it strikes the ball handles 31.
  • a doctor bar 11 is shown with a working doctor 68, which on its side facing the base body 47 projects into a channel 69 which runs in the axial direction of the anilox roller 1 and through grooves in the squeegee holder 71 and in the base body 47 is formed.
  • a plurality of springs 72 are arranged in the channel, which press the working squeegee 68 with its working edge 73 against the anilox roller 1 in the working state.
  • the springs can be designed as spiral springs or as leaf springs.
  • a second embodiment variant of an adjustable working squeegee 68 is shown as a detail.
  • the working squeegee 68 is in the rest position.
  • the working squeegee 68 projects with its side facing the base body 47 into a channel 74 and abuts against the top of a piston 76 which can be moved in the direction of arrow F in the channel 74.
  • the channel 74 has one or more supply channels 77 through which oil or compressed air as a medium can be supplied for actuation so that the bottom of the piston 76 is subjected to a uniform static pressure.
  • the pressure is regulated by a pressure generator, not shown, and with a known pressure regulator, not shown.
  • the piston 76 has a piston guide 78 on its bottom, which is arranged between the doctor holder 71 and the base body 47.
  • the piston guide 78 is provided with a wear indicator 79, which can consist of an electrical coil 81 or an inductive displacement sensor, which is likewise arranged between the base body 47 and the doctor holder 71 and the core of which is formed by the end of the piston guide 78.
  • a resulting signal for example on the screen of the machine control center, indicates the need to replace the worn squeegee.
  • the wear indicator 79 can also be designed so that the lower end of the piston guide 78 protrudes from the doctor bar 11 and is provided with a visually readable scale.
  • the doctor bar 11 is moved by means of the transport edges 57; 58 via the wedge-shaped ribs 44; 46 in a curve 82 according to FIG. 9 in positions H up to the working position N on the anilox roller 1.
  • the angle ⁇ of the working squeegee 68 changes with respect to the surface of the anilox roller 1.
  • the working squeegee In the L position, the working squeegee first comes into contact with the surface of the anilox roller 1 at the point of contact 83 or line of contact.
  • the angle ⁇ ′′ is approximately 90 ° between a tangent to the surface of the anilox roller 1 at the point of contact 83 and the working squeegee.
  • the end position N of the working squeegee 68 in the direction of the lowest point 84 of the surface of the anilox roller 1 corresponds to an angle ⁇ of approximately 40 °.
  • the intermediate position M has an angle ⁇ 'of approximately 60 ° to 70 °.
  • the working squeegee 68 After leaving the point of contact or the line 83 of the working edge of the working squeegee, the working squeegee 68 experiences a movement in the direction of arrow P against the force of the spring 72 or the piston 76, until the working position N of the working squeegee 68 at the working point N against the direction of rotation D of the anilox roller 1 is reached.
  • This enables both the setting of the working squeegee 68 against the anilox roller 1 without the working edge of the working squeegee bending, and also ensures continuous readjustment of the working squeegee 68 as a result of natural wear and tear.
  • the end position N of the working doctor 68 corresponds to a doctor blade supply position.
  • Curve 82 which executes the working edge of working squeegee 68 when it is brought up to contact point 83 or contact line 83, has proven to be particularly favorable.
  • This curve 82 corresponds to the branch of a parabola, the axis of symmetry 85 of which passes through the point of contact 83 or the line of contact 83 and whose inflection point also lies at the point of contact 83.
  • the working squeegee 68 is set with its working edge according to curve 75 to the anilox roller 1, which touches the anilox roller 1 linearly at the point of contact 86 and is then moved further in the working position N against the direction of arrow D to the working point 80.
  • Particularly thick squeegees can be moved cheaply in this way.
  • a wear indicator of the working doctor blade is guaranteed.
  • Such a wear indicator can also be used in the closing doctor blade.
  • base parts 47; 48 of the squeegee bar to be positioned separately on the anilox roller 1 in such a way that the base body 48 with the closing squeegee 53 remains on the anilox roller 1, ie is designed to be clampable, and the base body 48 with the working squeegee 52 via a cam track 82 or 75 to the anilox roller 1 is employable.
  • the base body 48 can be connected to the striking plate 54.
  • the base body 47 can over transport edges, the transport edges 57; 58 correspond to the base body 48 and both base bodies 47; 48 can be combined to form a doctor blade.
  • the working squeegee 68 is supported on a first side of a disk 88 which can be moved in the channel 74 against the force of a spring 71 in the transverse direction of the working squeegee 68.
  • the second side of the disk 88 is non-positively connected to a piston guide 89.
  • the piston guide 89 also runs in the transverse direction of the working doctor 68 and protrudes from a channel between the doctor holder 71 and the base body 47.
  • the aforementioned outstanding part of the piston guide 89 has a scale 91 for indicating wear.
  • FIG. 11 A further embodiment variant of a wear indicator of a working doctor blade 68 is shown in FIG. 11.
  • the working squeegee 68 can be moved on a disk 88 in a channel 74 against the force of a spring 72.
  • the squeegee holder 71 has a window 92, which with transparent material, for. B. glass, is clad. The position of the disk 88 and thus the degree of wear of the working squeegee 68 can be displayed through the window 92.
  • the squeegee bar 9 to 13 can be set against the anilox roller 1 in a region which is below the horizontal diameter of the anilox roller 1.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Screen Printers (AREA)

Claims (21)

  1. Procédé pour mettre en place une racle à chambre fermée contre un rouleau encreur (1), par exemple un rouleau de trame (1), suivant un angle négatif de mise en place, caractérisé en ce que l'on déplace au moins une lame de racle (52 ; 68), fixée sur ressorts sur une barre de racle (9 ; 11 ; 12 ; 13), contre le rouleau encreur (1) jusqu'à ce que l'arête de travail (73) de la lame de racle (52 ; 68) arrive en contact linéaire contre la surface du rouleau encreur (1) dans une position (83 ; 86) différente de la position de travail (N), on déplace ensuite la lame de racle (52 ; 68) le long de la surface du rouleau encreur (1) jusqu'à la position de travail (N), la lame de racle (52 ; 68) étant repoussée contre une force (P) dans une position de travail (N) de lame de racle.
  2. Procédé selon la revendication 1, caractérisé en ce que l'on déplace la lame de racle (52 ; 68) en sens contraire du sens de rotation (D) du rouleau encreur (1) contre la surface du rouleau encreur (1) jusqu'à la position de travail (80).
  3. Racle à chambre fermée avec une barre de racle (9 ; 11 ; 12 ; 13) pour un dispositif encreur d'une presse rotative à imprimer dont les lames de racles (52 ; 68) échangeables sont disposées dans une barre de racle (9 ; 11 ; 12 ; 13) suivant un angle négatif de mise en place par rapport au rouleau encreur (1), caractérisée en ce que, lors de la mise en place de la barre de racle (9 ; 11 ; 12 ; 13) contre le rouleau encreur (1), l'arête de travail (73) d'au moins une racle de travail (68) sur ressorts est en contact avec la surface du rouleau encreur (1) suivant un angle presque droit (α'') par rapport à la tangente (T) de la ligne de contact (83) sur le rouleau encreur (1), elle est repoussée contre la force d'un accumulateur de force (72 ; 76) dans la direction (P) de la barre de racle (9 ; 11 ; 12 ; 13) et elle se déplace en direction du point plus profond (84) du rouleau encreur (1) en sens contraire du sens de rotation (D) de ce dernier, jusqu'à ce que la position de travail (N) de la racle de travail (68) soit atteinte avec un angle négatif de mise en place (α) par rapport à la tangente du point de contact (80) de l'arête de travail (73) de la racle de travail (68) contre le rouleau encreur (1), des arêtes de transport (57 ; 58) sont prévues aux pieds de la barre de racle (9 ; 11 ; 12 ; 13), ces arêtes de transport étant en liaison avec des nervures (44 ; 46) d'un dispositif de blocage et de mise en place (19 ; 21) pour la barre de racle (9 ; 11 ; 12 ; 13).
  4. Racle à chambre fermée selon la revendication 3, caractérisée en ce que le dispositif de blocage et de mise en place (19 ; 21) a un corps (24) pivotant avec deux extrémités (26 ; 27) coudées et fourchues, le corps (24) est logé de manière à pouvoir tourner dans une fixation de barre de racle (22 ; 23) au moyen d'une vis d'ajustage (33) qui se trouve dans la direction axiale de la fixation de barre de racle (22 ; 23).
  5. Racle à chambre fermée selon les revendications 3 et 4, caractérisée en ce que la vis d'ajustage (33) est agencée dans un trou borgne (34) de la fixation de barre de racle (22 ; 23) et est entourée d'un manchon (36) dont le diamètre extérieur correspond au trou borgne (34).
  6. Racle à chambre fermée selon les revendications 3 à 5, caractérisée en ce que le manchon (36) comporte sur sa circonférence une rainure annulaire (37) dans laquelle pénètre l'extrémité d'une vis de blocage (38) fixée au chassis.
  7. Racle à chambre fermée selon les revendications 3 à 6, caractérisée en ce que des rondelles-ressorts (41) sont agencées entre la tête (39) de la vis d'ajustage (33) et une face frontale du manchon (36).
  8. Racle à chambre fermée selon les revendications 3 et 4, caractérisée en ce qu'un arbre (28), qui supporte un levier (29) qui comporte à une extrémité une poignée sphérique (31) et à l'autre extrémité un excentrique (32), est agencé entre les extrémités (26 ; 27) fourchues.
  9. Racle à chambre fermée selon la revendication 8, caractérisée en ce que le levier (29) est logé par l'intermédiaire d'un trou dans l'excentrique (32) de manière à pouvoir pivoter sur l'arbre (28).
  10. Racle à chambre fermée selon les revendications 3 à 9, caractérisée en ce que l'excentrique (32) est en liaison active avec un corps de base (47) de la barre de racle (9 ; 11 ; 12 ; 13).
  11. Racle à chambre fermée selon les revendications 3 à 10, caractérisée en ce que le corps (24) comporte un rail de guidage (42) qui s'étend dans la direction axiale de la vis d'ajustage (33).
  12. Racle à chambre fermée selon les revendications 3 à 11, caractérisée en ce que le corps (24) est limité dans son mouvement de rotation par rapport à la position horizontale du levier (29) par une butée (70).
  13. Racle à chambre fermée selon les revendications 3 à 12, caractérisée en ce qu'une cavité de commutation (59), qui coopère avec un élément de poussée ou palpeur (63) d'un commutateur miniature (64) pour la circulation de l'encre, est agencée dans un corps de base (48) de la barre de racle (9 ; 11 ; 12 ; 13).
  14. Racle à chambre fermée selon les revendications 3 à 13, caractérisée en ce que la barre de racle (9 ; 11 ; 12 ; 13) peut être mise en place au moyen d'un actionnement par des cylindres pneumatiques de travail.
  15. Racle à chambre fermée selon les revendications 13 à 14, caractérisée en ce que les nervures (44 ; 46) ont une section en forme de coin, les nervures (44 ; 46) ont une largeur différente (b 44 ; b 46) pour la même hauteur.
  16. Racle à chambre fermée selon la revendication 15, caractérisée en ce que les sections en forme de coin ont une pente différente (S 44 ; S 46), la pente (S 44) de la première nervure (44) est plus grande que la pente (S 46) de la seconde nervure (46).
  17. Racle à chambre fermée selon l'une des revendications 3 à 16, caractérisée en ce que le corps de base (47) avec la racle de travail (68) peut être mis en place contre le rouleau encreur (1) suivant une courbe (82 ; 75).
  18. Racle à chambre fermée selon l'une des revendications 3 à 17, caractérisée en ce que le corps de base (47) a des pieds avec des arêtes de transport (57 ; 58) qui coopèrent avec les nervures (44 ; 46).
  19. Racle à chambre fermée selon l'une des revendications 3 à 18, caractérisée en ce qu'un corps de base (48) avec la racle de fermeture (53) est agencé contre le rouleau encreur (1) en position de travail de manière à pouvoir être bloqué.
  20. Racle à chambre fermée selon l'une des revendications 3 à 19, caractérisée en ce que la racle de travail (52 ; 68) comporte un indicateur d'usure (79).
  21. Racle à chambre fermée selon l'une des revendications 3 à 20, caractérisée en ce que les arêtes de transport (57 ; 58) sont conçues biseautées et sous forme de surfaces.
EP93106426A 1992-04-25 1993-04-21 Procédé pour appliquer un dispositif en creur à chambre fermée sur un rouleau encreur et dispositif pour sa mise en oeuvre Expired - Lifetime EP0567909B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4213662 1992-04-25
DE4213662A DE4213662C2 (de) 1992-04-25 1992-04-25 Verfahren zum Anstellen einer Kammerrakel für eine Rotationsdruckmaschine

Publications (2)

Publication Number Publication Date
EP0567909A1 EP0567909A1 (fr) 1993-11-03
EP0567909B1 true EP0567909B1 (fr) 1996-11-27

Family

ID=6457479

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93106426A Expired - Lifetime EP0567909B1 (fr) 1992-04-25 1993-04-21 Procédé pour appliquer un dispositif en creur à chambre fermée sur un rouleau encreur et dispositif pour sa mise en oeuvre

Country Status (5)

Country Link
US (1) US5388515A (fr)
EP (1) EP0567909B1 (fr)
JP (1) JPH0710595B2 (fr)
DE (2) DE4213662C2 (fr)
FI (1) FI106107B (fr)

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DE4440040C2 (de) * 1994-11-10 2002-09-12 Koenig & Bauer Ag Haltevorrichtung für eine Kammerrakel
DE4447123C1 (de) * 1994-12-29 1996-04-11 Koenig & Bauer Albert Ag Kammerrakel für eine Rotationsdruckmaschine
DE19503695C2 (de) † 1995-02-04 1997-02-27 Roland Man Druckmasch Absicherung für eine Druckmaschine
US5832835A (en) * 1996-07-12 1998-11-10 Markem Corporation Soft doctoring cup
DE19757897C1 (de) * 1997-12-24 1999-07-22 Koenig & Bauer Ag Anordnung für ein Farbwerk einer Rotationsdruckmaschine
US6443064B1 (en) * 1999-11-22 2002-09-03 T. D. Wright, Inc. Mounting printing plate cylinder having tapered bore to untapered rotatable drive shaft
US7062354B2 (en) 2000-11-08 2006-06-13 Orbotech Ltd. Multi-layer printed circuit board fabrication system and method
DE10158157B4 (de) 2001-11-28 2006-09-07 Koenig & Bauer Ag Farbwerk einer Druckmaschine
EP1362696B1 (fr) * 2002-05-18 2006-09-20 Fischer & Krecke GmbH & Co. KG Machine d'impression avec dispositif de raclage
CN1325257C (zh) * 2004-01-08 2007-07-11 寿原株式会社 墨斗
US7498767B2 (en) * 2005-02-16 2009-03-03 Midtronics, Inc. Centralized data storage of condition of a storage battery at its point of sale
US8418613B2 (en) * 2007-05-02 2013-04-16 Bobst Sa Methods of assembling, dismantling and transforming a print unit intended for a printing machine, and transport device used
WO2009100344A2 (fr) * 2008-02-08 2009-08-13 Kadant Web Systems, Inc. Surfaces thermiquement adaptatives pour recevoir des pulvérisations thermiques
US9020405B2 (en) 2012-01-12 2015-04-28 Lexmark International, Inc. Bias member for the doctor blade of the developer unit in an imaging Device
US8741657B1 (en) * 2013-02-25 2014-06-03 U.S. Department Of Energy Nanocomposite thin films for optical gas sensing
CN108819479B (zh) * 2018-09-19 2024-04-19 江苏华宇印涂设备集团有限公司 一种电动墨斗系统
DE102018129086A1 (de) * 2018-11-19 2020-05-20 Windmöller & Hölscher Kg Rakelkammerträger
JP7468345B2 (ja) * 2019-09-27 2024-04-16 東レ株式会社 スクレーパ装置、除去対象物除去機能を有する回転装置、除去対象物除去方法、フィルムの製造方法及び微多孔膜の製造方法
KR102277054B1 (ko) * 2020-11-23 2021-07-13 주식회사 선진써피스싸이언스 그라비아 인쇄 장치

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AT289156B (de) * 1967-05-16 1971-04-13 Johannes Zimmer Schaber
US3593663A (en) * 1969-06-03 1971-07-20 Zerand Corp Doctor blade assembly for printing equipment
DE2538908A1 (de) * 1975-09-02 1977-03-10 Kaspar Walter Maschinenfabrik Langzeit-tiefdruckrakel
DE3101300C2 (de) * 1980-12-01 1983-03-17 Windmöller & Hölscher, 4540 Lengerich Rakelvorrichtung
DE3832160A1 (de) * 1988-09-22 1990-04-12 Roland Man Druckmasch Rakelfarbwerk
DE4012825A1 (de) * 1990-04-23 1991-10-24 Koenig & Bauer Ag Kammerrakel

Also Published As

Publication number Publication date
JPH0710595B2 (ja) 1995-02-08
DE59304566D1 (de) 1997-01-09
FI931057A0 (fi) 1993-03-10
DE4213662C2 (de) 1995-07-06
EP0567909A1 (fr) 1993-11-03
JPH0615806A (ja) 1994-01-25
DE4213662A1 (de) 1993-10-28
US5388515A (en) 1995-02-14
FI931057A (fi) 1993-10-26
FI106107B (fi) 2000-11-30

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