EP0021002B1 - Dosage de l'encre au moyen de lames d'encrage individuelles s'étendant chacune sur toute la largeur de la région de réglage - Google Patents

Dosage de l'encre au moyen de lames d'encrage individuelles s'étendant chacune sur toute la largeur de la région de réglage Download PDF

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Publication number
EP0021002B1
EP0021002B1 EP80102669A EP80102669A EP0021002B1 EP 0021002 B1 EP0021002 B1 EP 0021002B1 EP 80102669 A EP80102669 A EP 80102669A EP 80102669 A EP80102669 A EP 80102669A EP 0021002 B1 EP0021002 B1 EP 0021002B1
Authority
EP
European Patent Office
Prior art keywords
metering
ink duct
ink
support areas
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
Application number
EP80102669A
Other languages
German (de)
English (en)
Other versions
EP0021002A1 (fr
Inventor
Willi Jeschke
Rudi Junghans
Hermann Beisel
Günther Hofmann
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen 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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Priority to AT80102669T priority Critical patent/ATE6138T1/de
Publication of EP0021002A1 publication Critical patent/EP0021002A1/fr
Application granted granted Critical
Publication of EP0021002B1 publication Critical patent/EP0021002B1/fr
Expired 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
    • B41F31/04—Ducts, containers, supply or metering devices with duct-blades or like metering devices

Definitions

  • the invention relates to an ink fountain for offset or high-pressure machines with an ink metering device which consists of a large number of metering means which are arranged closely next to one another, are zone-wide and can be adjusted to zonal different ink gap thicknesses, and have support areas which are constantly or directly applied to the ink fountain roller under spring pressure.
  • the DD-PPS 120 833 which has a metering device consisting of metering tongues arranged next to one another in the longitudinal direction of the ink fountain roller, should first be mentioned as prior art.
  • the metering areas are arranged in the direction of rotation of the ink fountain roller in addition to the support webs remaining due to the milled portions on the front parts of the zone tongues and forming the support area, color-free stripes on the ink fountain roller cannot be avoided.
  • each zone-wide metering element in the axial direction of the ink fountain roller has side by side support and metering areas.
  • This known device has a number of advantages, for example the independent, resilient support of each individual metering element on the ink fountain roller enables the ink film thickness of adjacent zones to be controlled without influencing one another. Fluctuations in the ink film thickness due to the ink fountain roller running out of alignment are also completely eliminated.
  • the known device thus offers the basis for a reproducible, sensitive, zone-by-zone determination of the color gap.
  • the support and metering areas are arranged next to each other here too, color-free stripes on the ink fountain roller cannot be avoided.
  • the object of the invention is to prevent the formation of color-free stripes on the ink fountain roller due to the constant contact of the support areas while maintaining all the advantages of a device according to DE-AS 26 48 098.
  • the invention is that between the support areas, even with different positions of the individual dosing means, the same or approximately the same flow cross-section are provided, that the support areas, seen in the direction of rotation of the ink fountain roller, are provided with wiping edges and form the dosing area proper, the dosing area of which is arranged extends over the full zone width and which are arranged behind the support areas at such a distance that the color can spread axially there and be distributed evenly over the entire zone width.
  • the ink under dynamic pressure can spread out in the axial direction of the ink fountain roller, as a result of which the color-free strips produced by the support areas are refilled with paint. There is thus no need for additional rubbing in order to eliminate any harmful influence which the color-free strips may have on the inking of the printing plate.
  • the ink metering device 6 is located at the lower end of the pressure bars 5. It essentially consists of the metering elements 7, which are arranged axially parallel to the ink fountain roller 4, close together.
  • the pressure bars 5 and the metering elements 7 are covered by an elastic film 8 which is attached to the pressure bars 5 in the upper region of the ink fountain 1.
  • the printing ink 9 is located in the wedge-shaped space between the elastic film 8, the side walls 3 of the ink fountain 1 and the ink fountain roller 4.
  • Each zone-wide printing strip 5 is supported on a compression spring 10 provided in the base plate 2 of the ink fountain 1.
  • the screws mentioned above give each pressure bar 5 so much freedom in the vertical direction that the Dosing elements 7 with the interposition of the elastic film 8 are constantly pressed against the lateral surface 11 of the ink fountain roller 4.
  • Each metering element 7 is adjustable about its longitudinal axis via an adjusting arm 12, a link 13, an adjusting nut 14 and a zone adjusting screw 15 which is rotatably arranged in the ink fountain 1.
  • the adjustment range includes the O position, in which no color is let through in the respective zone - this position is shown in FIG. 1 - and all other settings up to the maximum ink layer thickness.
  • the metering element 7 is, as shown in FIGS. 2 and 3 in particular, cylindrical, but has a flattening or eccentric turning on part of its circumference, the so-called flow-through groove 16. However, this does not extend over the entire length of the metering element 7, but leave two ring shoulders at both ends, the so-called support areas 17.
  • a secant recess 18 is provided in the cylindrical metering element 7, in which a metering knife 19 extending over the entire length of the metering element 7 is provided is.
  • the scraper edge 20 of this metering knife 19 represents the metering area and rises at least up to a plane with the part of the support areas 17 which rises highest above the flow-through groove 16.
  • the metering element 7 also has a bore 21 into which the actuating arm 12 projects.
  • the elastic film 8 not only covers all the pressure bars 5, but, as mentioned, also the metering elements 7 as far as beyond the scraper edge 20 of the metering knives 19.
  • a cover plate 22 is provided on the ink fountain 1. Its upper, free end 23, which is angled toward the metering elements 7, is still covered by the elastic film 8.
  • the associated metering element 7 is adjusted about its longitudinal axis in such a way that the gap between the scraper edge 20 of the zone-wide metering knife 19 and the lateral surface 11 of the ink fountain roller 4 is changed.
  • the elastic film adapts to the setting of the metering knife 19, i.e., due to the hydrodynamic pressure of the ink 9, it lies constantly on the scraper edge 20 of the metering knife 19. The position of the metering knife 19 thus determines the colored strip dykes in this zone.
  • the metering knife 19 is provided so far from the contact point 24 of the support areas 17 that the space is large enough to deflect the elastic film due to the dynamic pressure, so that the paint 9 flows in the axial direction into the area in which the support areas 17 pass their constant system produce a color-free streak on the jacket 11 of the ink fountain roller 4. Despite the constant indirect contact of the support areas 17 on the ink fountain roller 4, a zone-wide, continuous ink layer thickness is thus generated due to the offset arrangement of the zone-wide metering knives 19.
  • FIG. 4 differs from the one described above primarily only in that the metering elements 7 of the ink metering device 6 have been given a flat-shaped design.
  • Fig. 5 shows a cross section through such a flat piece.
  • the metering elements 7 are used here as a slide.
  • the zone adjusting screw 15 projects into a threaded bore 25 of the metering element 7 and, when it is rotated, causes a tangential adjustment of the metering element 7 relative to the ink fountain roller 4.
  • a leaf spring 26 fastened in the ink fountain 1 presses the associated metering element 7 continuously in the direction of the ink fountain roller 4
  • the metering element 7 is supported here via rib-shaped support areas 17 with the interposition of the elastic film 8 on the lateral surface 11 of the ink fountain roller 4.
  • a zone-wide metering knife 19 is attached to the front end wall 27 of each metering element 7 designed as a flat piece. Its wiping edge 20 projects beyond the support areas 17. The height of the wiping edge 20 must be such that in the O position of the metering element 7 the wiping edge 20 and the support areas 17 simultaneously abut the lateral surface 11 of the ink fountain roller 4. In this embodiment, too, all the metering elements 7 are covered by the elastic film 8 beyond the metering knives 19. Scraper edge 20 and support areas 17 thus never lie directly on the lateral surface 11.
  • the gap between the wiping edge 20 including the overlying film 8 and the lateral surface 11 of the ink fountain roller 4 is changed in the respective zone.
  • the support areas are always indirectly in contact with the lateral surface 11 of the ink fountain roller 4, the ink-free strips produced thereby cannot have a disadvantageous effect, because in the space between the support areas 17 and the wiping edge 20, the ink 9 under back pressure is the ink-free area generated by the support areas 17 replenishes.
  • Zone width and pressure bars 5 which are under pressure from a spring 10 are provided here on the base plate 2 of the ink fountain 1, exactly as in the embodiment according to FIG. 1. At their front end, however, these pressure bars 5 have support areas 17, via which they are supported with the interposition of the film 8 on the lateral surface 11 of the ink fountain roller 4.
  • a cylindrical rotary valve 30 is rotatably mounted about its longitudinal axis. It also runs coaxially with the ink fountain roller 4.
  • the rotary valve 30 consists of a cylinder which has exactly the length of the zone width and is eccentrically turned over a certain circumferential range. In its concentric area, it is supported in a slide bearing 31 of the pressure bar 5.
  • the eccentrically turned off portion 32 can be juxtaposed with the ink fountain roller 4 by adjusting means. The eccentricity of this turned surface causes a gap of different size to be formed over the entire zone width depending on the setting between the elastic film 8 covering the pressure bar 5 and the rotary valve 30 and the lateral surface 11 of the ink fountain roller 4.
  • a flattening could also be used as the metering surface.
  • Each zone-wide rotary valve 30 can be rotated about its longitudinal axis via an adjusting arm 12, a link 13, an adjusting nut 14 and a zone adjusting screw 15.
  • the zone adjusting screw 15 can be actuated not only via the handwheel 33, but also via the servomotor 34 for remote adjustment.
  • the respective position of the zone screw 15 and thus the angular position of the rotary valve 30 are reported by the potentiometer 35 actuated by the zone setting screw 15 to a display, control or regulating device, not shown.
  • Fig. 7 shows an ink fountain 1 with an ink fountain roller 4 immersed in the ink 9 and an ink metering device 6 provided above the ink fountain 1.
  • the latter consists of a series of metering elements 7 arranged over the length of the ink fountain 1, which are designed as doctor-wide doctor blades.
  • a traverse 36 running parallel to the ink fountain roller 4 adjusting nuts 37 are rotatably mounted for each zone, into each of which a threaded bolt 38 projects, the free end of which is connected to a sliding claw 39 in which the doctor-shaped metering element 7 is fastened.
  • a leaf spring 40 provided in the crossmember 36 rests on the underside of the doctor-shaped metering element 7 and presses it in the direction of the lateral surface 11 of the ink fountain roller 4.
  • the front end of the metering element 7 is provided with a scraper edge 20 and also has an end face, as in particular 8 shows two support arms 41 on which support rollers 42 are rotatably mounted. These support rollers 42 run on the lateral surface 11 of the ink fountain roller 4.
  • the respective position of the doctor-shaped metering element 7 in the vertical direction determines the distance of the stripping edge 20 from the lateral surface 11 of the ink fountain roller 4. In the lower position shown in solid lines, the stripping edge 20 lies against the lateral surface 11 and thus does not allow any color to pass.
  • the support rollers 41 nevertheless still have contact with the lateral surface 11 of the ink fountain roller 4, since the leaf spring 40 moves the metering element 7 in the direction of the ink fountain roller 4 presses.
  • the support rollers 42 are in front of the stripping edge 20, the color-free stripes produced by them can be refilled with paint from the stripping edge 20.
  • the dosing elements 7 are provided outside the ink fountain 1 and above the mirror of the ink 9, they do not need to be covered by a film 8. All zone-wide metering elements 7 are arranged directly next to one another, next to one another. A completely independent, streak-free adjustment of the color film of each zone is thereby ensured.
  • each zone-wide doctor-shaped metering element 7 can be supported directly on support surface 41 on the lateral surface 11 of the ink fountain roller 4. The support rollers 42 are then unnecessary.
  • each metering element 7 is applied to the ink fountain roller 4 on its own, ie independently of the others.
  • a distance of approximately 4 mm must be provided between the support point 24 and the scraper edge 20 in order to ensure adequate filling of the color-free strips. But it is quite conceivable that this distance can be reduced by special design of the support areas 17.
  • Another possible modification of the invention is that the rotary valve 30 in the embodiment according to FIG. 6 is replaced by other valve designs.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Cosmetics (AREA)
  • Medicinal Preparation (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Coating Apparatus (AREA)

Claims (7)

1. Encrier (1) pour presses offset ou typographiques, muni d'un dispositif doseur d'encre (6) qui est constitué par un grand nombre de moyens doseurs (7) étroitement juxtaposés, de la largeur d'une zone et réglables sur des largeurs de fente d'encrage différentes par zones, qui présentent des régions d'appui (17) qui sont appliquées constamment, directement ou indirectement, contre le cylindre d'encrier, sous une pression élastique, caractérisé en ce que, entre les régions d'appui (17), sont prévues des ouvertures d'écoulement (16, 44) qui présentent une section d'écoulement toujours identique ou approximativement identique, même dans le cas de positions différentes des différents moyens doseurs (7), en ce que, en aval des régions d'appui (17) considéré dans le sens de la rotation du cylindre d'encrier (4), sont disposés des éléments doseurs (19, 30, 7) munis de bords râcleurs (20), qui forment la région de dosage proprement dite, dont la région de dosage s'étend sur la totalité de la largeur de la zone et qui sont disposés en aval des régions d'appui (17) à une distance telle qui, là, l'encre puisse s'étaler axialement et se répartir uniformément sur toute la largeur de la zone.
2. Encrier selon la revendication 1, caractérisé en ce que les moyens doseurs (7) sont cylindriques et peuvent être tournés dans la direction circonférentielle, présentent une ou plusieurs région(s) d'appui (17) qui est ou sont appliquée(s) contre le cylindre (4) de l'encrier avec interposition d'une feuille (8) en ce qu'il est prévu, à côté des régions d'appui (17) ou entre ces régions d'appui, considéré dans la direction longitudinale des moyens de dosage (7), des rainures d'écoulement (16) sous la forme de méplats ou d'évidements tournés, et en ce qu'il est prévu des lames doseuses (19), montées sur les moyens doseurs (7), décalées par rapport aux régions d'appui (17) dans la direction circonférentielle, qui font saillie au-delà de la circonférence des moyens doseurs (7), au moins jusqu'au plan des surfaces d'appui (17) et qui s'étendent chacune sur toute la largeur du moyen doseur (7) qui lui est associé.
3. Encrier selon la revendication 1, caractérisé en ce que les moyens doseurs (7) sont réalisés sous la forme d'une pièce plate et sont disposés mobiles en translation tangentiellement au cylindre (4) de l'encrier; en ce que les moyens doseurs (7) présentent des régions d'appui (17) en forme de nervures, qui s'étendent dans la direction de la translation, entre lesquelles sont prévues des rainures d'écoulement (16) et qui s'appuient contre le cylindre (4) de l'encrier avec interposition d'une feuille (8), et en ce qu'à l'extrémité avant de chaque pièce plate est fixée, en tant qu'élément doseur, une lame doseuse (19) possédant la largeur d'une zone et dont le bord râcleur (20) fait légèrement saillie audelà des régions d'appui (17).
4. Encrier selon la revendication 1, caractérisé en ce que les moyens doseurs (7) sont réalisés en plusieurs pièces et sont constamment appliqués, directement ou indirectement, contre le cylindre (4) de l'encrier, sous une pression élastique, l'élément doseur (30) étant un cylindre coaxial au cylindre (4) de l'encrier qui s'étend sur toute la largeur de la zone et présentant un profil circonférentiel s'étendant excentriquement sur une certaine région de la circonférence, et qui est tourillonné au bond avant des moyens doseurs, considéré dans le sens de la rotation du cylindre de l'encrier de façon qu' on puisse le faire tourner.
5. Encrier selon la revendication 4, caractérisé en ce que dans l'encrier (1 ) et sur toute la largeur du cylindre (4) de l'encrier sont disposées dey barrettes de pression (5) sous forme d'éléments doseurs, de la largeur d'une zone, étroitement juxtaposées et en ce que, dans les barrettes de pression (5) sont prévues entre les régions d'appui (17), des rainures d'écoulement (16) qui s'étendent dans la direction de la rotation du cylindre (4) de l'encrier.
6. Encrier selon la revendication 1, dans lequel les éléments doseurs (7) sont constitués par des râcles mobiles en translation, de la largeur d'une zone qui peuvent se déplacer en translation tangentiellement au cylindre (4) de l'encrier et présentent un bord râcleur (20) dans leur région avant, caractérisé en ce que sur chaque élément doseur (7) sont prévus un ou plusieurs bras d'appui (41) sur lesquels sont montés rotatifs des galets d'appui (42) qui forment les régions d'appui, qui sont placés en amont du bord râcleur (20) et par l'intermédiaire desquels les éléments doseurs (7) prennent appui sur le cylindre (4) de l'encrier.
7. Encrier selon la revendication 6, caractérisé en ce que les éléments doseurs (7) prennent appui directement sur le cylindre (4) de l'encrier par l'intermédiaire des bras d'appui (41) et avec interposition d'une feuille (8).
EP80102669A 1979-06-12 1980-05-13 Dosage de l'encre au moyen de lames d'encrage individuelles s'étendant chacune sur toute la largeur de la région de réglage Expired EP0021002B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80102669T ATE6138T1 (de) 1979-06-12 1980-05-13 Farbdosierung mit einzelnen, jeweils ueber die gesamte zonenbreite reichenden farbmessern.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2923678 1979-06-12
DE2923678A DE2923678C2 (de) 1979-06-12 1979-06-12 Farbkasten mit einzelnen, jeweils über die gesamte Zonenbreite reichenden Farbdosiereinrichtungen

Publications (2)

Publication Number Publication Date
EP0021002A1 EP0021002A1 (fr) 1981-01-07
EP0021002B1 true EP0021002B1 (fr) 1984-02-08

Family

ID=6073013

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80102669A Expired EP0021002B1 (fr) 1979-06-12 1980-05-13 Dosage de l'encre au moyen de lames d'encrage individuelles s'étendant chacune sur toute la largeur de la région de réglage

Country Status (13)

Country Link
US (1) US4387648A (fr)
EP (1) EP0021002B1 (fr)
JP (1) JPS562171A (fr)
AR (1) AR225924A1 (fr)
AT (1) ATE6138T1 (fr)
AU (1) AU529374B2 (fr)
CA (1) CA1128812A (fr)
DE (2) DE2923678C2 (fr)
DK (1) DK146379C (fr)
ES (1) ES492327A0 (fr)
IT (1) IT8053294V0 (fr)
NO (1) NO151186C (fr)
ZA (1) ZA803515B (fr)

Families Citing this family (19)

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Publication number Priority date Publication date Assignee Title
DE3203500C2 (de) * 1982-02-03 1988-03-03 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Farbmesser und eine Einstellvorrichtung für ein Farbmesser
DE3217569C2 (de) * 1982-05-11 1985-11-28 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Verfahren und Vorrichtung zum Dosieren der Farbe bei Offsetdruckmaschinen
DD209777A1 (de) * 1982-09-21 1984-05-23 Arndt Jentzsch Farbdosiereinrichtung
DE3308066C1 (de) * 1983-03-08 1984-09-13 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Farbdosiervorrichtung fuer eine Farbkastenwalze
DE3311113C1 (de) * 1983-03-26 1988-05-05 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Dosierelemente in Farbkaesten von Offsetdruckmaschinen
DE3324950C2 (de) * 1983-07-11 1986-04-03 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Farbdosiereinrichtung für eine Druckmaschine
JPS60113437A (ja) * 1983-11-24 1985-06-19 Hitachi Ltd 樹脂封止用金型
DE3427909A1 (de) * 1984-07-28 1986-02-06 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Farbdosiereinrichtung
DE3503736C1 (de) * 1985-02-04 1985-12-05 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Farbdosiereinrichtung an Druckmaschinen
DE3538256A1 (de) * 1985-10-28 1987-04-30 Heidelberger Druckmasch Ag Farbkasten fuer offset- oder hochdruckmaschinen
CH677211A5 (fr) * 1988-05-31 1991-04-30 Bobst Sa
US5233922A (en) * 1991-01-10 1993-08-10 Belgium Tool And Die Company Ink fountain for a can coater
JPH07107277B2 (ja) * 1992-01-28 1995-11-15 エスコ・コーポレイション ドラグラインバケット及びその操作方法
DE19649318A1 (de) * 1996-11-28 1998-06-04 Heidelberger Druckmasch Ag Farbkasten für Rotationsdruckmaschinen
DE29720791U1 (de) * 1997-11-24 1998-01-08 Heidelberger Druckmaschinen Ag, 69115 Heidelberg Farbkasten für Rotationsdruckmaschinen
DE102006062980B3 (de) 2005-12-12 2021-07-29 Heidelberger Druckmaschinen Intellectual Property Ag & Co. Kg Detektor zur Schließpunkterfassung im Farbkasten
JP2013039748A (ja) * 2011-08-17 2013-02-28 Komori Corp インキ供給装置
EP2969568A4 (fr) * 2013-03-13 2016-11-23 Probity Engineering Llc Appareil encreur et procédé de réglage du débit d'encre pour appareil de flexographie
CN114953723B (zh) * 2022-06-20 2023-06-20 安徽工程大学 一种自适应印刷机器人

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Publication number Priority date Publication date Assignee Title
CH392566A (de) * 1961-05-03 1965-05-31 Maschf Augsburg Nuernberg Ag Rillenfarbwerk für Druckmaschinen
US3818830A (en) * 1972-05-15 1974-06-25 Int Machine Prod Inc Arrangement for supplying ink for a printing machine
DE2264119C3 (de) * 1972-12-29 1978-12-07 Albert-Frankenthal Ag, 6710 Frankenthal Farbmesser eines Druckmaschinenfarbwerks
US4242598A (en) * 1974-10-02 1980-12-30 Varian Associates, Inc. Temperature compensating transistor bias device
DE2460116C3 (de) * 1974-12-19 1979-09-06 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Farbkasten für Druckmaschinen
DD120833A1 (fr) * 1975-05-15 1976-07-05
DE2530109C3 (de) * 1975-07-05 1978-05-03 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Farbwerk für Druckmaschinen
DE2648098C3 (de) * 1976-10-23 1984-01-05 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Farbkasten für Offset- oder Hochdruckmaschinen

Also Published As

Publication number Publication date
AU5879580A (en) 1980-12-18
DK146379B (da) 1983-09-26
ZA803515B (en) 1981-06-24
DK249280A (da) 1980-12-13
ATE6138T1 (de) 1984-02-15
JPS562171A (en) 1981-01-10
ES8101467A1 (es) 1980-12-16
CA1128812A (fr) 1982-08-03
DE3066474D1 (en) 1984-03-15
DK146379C (da) 1984-03-05
NO151186C (no) 1985-02-27
AU529374B2 (en) 1983-06-02
DE2923678C2 (de) 1982-02-18
NO801740L (no) 1980-12-15
EP0021002A1 (fr) 1981-01-07
JPS5747028B2 (fr) 1982-10-06
DE2923678A1 (de) 1980-12-18
IT8053294V0 (it) 1980-06-11
NO151186B (no) 1984-11-19
ES492327A0 (es) 1980-12-16
US4387648A (en) 1983-06-14
AR225924A1 (es) 1982-05-14

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