EP0054405A1 - Procédé pour la préparation de stratifiés décoratifs - Google Patents
Procédé pour la préparation de stratifiés décoratifs Download PDFInfo
- Publication number
- EP0054405A1 EP0054405A1 EP81305807A EP81305807A EP0054405A1 EP 0054405 A1 EP0054405 A1 EP 0054405A1 EP 81305807 A EP81305807 A EP 81305807A EP 81305807 A EP81305807 A EP 81305807A EP 0054405 A1 EP0054405 A1 EP 0054405A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- paper
- decorative laminate
- manufacture
- pigment
- binder
- 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.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/18—Paper- or board-based structures for surface covering
- D21H27/22—Structures being applied on the surface by special manufacturing processes, e.g. in presses
- D21H27/26—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the overlay sheet or the top layers of the structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C5/00—Processes for producing special ornamental bodies
- B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
- B44C5/0469—Ornamental plaques, e.g. decorative panels, decorative veneers comprising a decorative sheet and a core formed by one or more resin impregnated sheets of paper
Definitions
- This invention relates to a process for the manufacture of decorative laminates, to the laminates so made and to a paper for use in the process.
- Decorative laminates are used, for example, for surfacing furniture, particularly kitchen or other furniture where it is desirable to have a water-resistant, easily-wipeable surface, for counter tops in shops and cafes and for building panels. They may be white or coloured, and may be plain or printed, for example with a woodgrain or other pattern. Printing may be in several colours, and is usually effected by a rotogravure technique.
- One well-known type of decorative laminate (usually known as a high-pressure laminate) consists of several so-called core sheets for imparting strength to the laminate, a decorative sheet serving to mask the uppermost core sheet and to afford the laminate an attractive surface, and an overlay sheet on top of the decorative sheet (the overlay sheet becomes transparent during manufacture of the laminate, and so does not mask the decorative sheet).
- a so-called barrier sheet can be provided between the decorative sheet and the uppermost core sheet to afford an additional masking effect. All the sheets forming the laminate are impregnated with a thermo-setting resin, for example a phenolic resin or a melamine-formaldehyde or other aminoplast resin (the various sheets making up the laminate are not usually all impregnated with the same resin).
- the impregnating resin in the case of the decorative sheet is most commonly a melamine formaldehyde resin.
- the resin is usually present in an amount of the order of 100% w/w.
- the decorative sheet normally carries the print.
- the overlay sheet may carry the print on its surface which contacts the decorative sheet.
- the core sheets are normally of strong relatively inexpensive paper, for example unbleached softwood kraft paper. Such paper is not of uniform or particularly attractive appearance, and is not suitable for high quality printing. For this reason,'i-t is necessary for the: decorative sheet to be sufficiently opaque to mask the unattractive and non-uniform appearance of the uppermost core sheet, and for it to be suitable for high quality printing.
- a sheet of chipboard or similar material is used directly as a support for the decorative sheet, instead of the core sheets.
- the decorative sheet in such a laminate serves to mask.the chipboard rather than the core sheets.
- Barrier sheets are not normally used in this type of laminate since chipboard is normally of a lighter shade than core sheets and hence is more easily masked.
- plastic base surface paper In addition to being opaque and suitable for printing, it must be absorbent so that it may easily be impregnated with resin during a single pass through an impregnating bath, which typically takes about 20sec. The same applies to the overlay sheet if it is to be printed.
- the absorbency of plastic base surface paper is typically in the range 30 to 65 mm/10 min if for use in a high-pressure laminate, or in the range 25 to 45 mm/10 min if for use in a low-pressure laminate (in the Klemm method a strip of paper 15 mm wide is suspended vertically with one end in a dish of the liquid concerned and the distance the liquid soaks up the paper in ten minutes is measured).
- the absorbency of an overlay sheet is typically in the higher part of the range quoted for plastic base surface paper for use in a high-pressure laminate.
- the absorbency of plastic base surface paper may also be quoted.in terms of porosity as measured by a Gurley porosity tester, since porosity is related to speed of absorbency in this instance.
- Plastic base surface paper typically has a Gurley porosity (20 oz) in the range 10 to 25 sec/100 ml preferably 20 to 25 sec/100 ml, if for use in a high-pressure laminate, or in the range 15 to 50 sec/100 ml if for use in a low-pressure laminate, although values of 70 sec/100 ml or more are acceptable.
- plastic base surface paper and overlay paper to be absorbent results in a relatively rough paper surface which is not particularly suitable for high quality gravure printing.
- the rough surface makes it difficult to obtain complete print coverage from every gravure cell.
- the absorbent nature of the paper allows ink to penetrate into the sheet and print intensity is therefore reduced.
- plastic base surface and overlay paper can be printed to a high standard, provided larger quantities of ink are used than would be needed on a good printing surface or provided a lower absorbency is acceptable.
- the present invention provides in a first aspect a process for the manufacture of a decorative laminate comprising the steps of applying a liquid coating composition comprising a pigment and a binder to a surface of a previously formed and dried decorative laminate surface or overlay paper to give a coatweight when dry of up to 10gm -2 on said surface, the resulting coated paper having a Gurley porosity (20 oz) of about 10 to 70 sec/100 ml, printing a desired pattern on said coated surface of said paper, impregnating the resulting printed paper with a thermo-setting resin and laminating the impregnated paper to a support therefor under conditions effective to cure the resin, thereby to produce said decorative laminate.
- the present invention provides a decorative laminate surface or overlay paper carrying a coating composition comprising a pigment and a binder on a surface thereof at a coatweight of up to 10gm -2 , said paper having a Gurley porosity of about 10 to 70 sec/100 ml and said pigment being kaolin, calcium carbonate, titanium dioxide or barium sulphate.
- the coatweight and the weight ratio of pigment to binder must be chosen carefully.
- the preferred dry coatweight is in the range of from 2.5 to 3gm -2 .
- the weight ratio of pigment to binder in the coating is preferably in the range 5:1 to 1:1, more preferably from 2.5:1 to 3.5:1.
- the Gurley porosity (20 oz ) of the coated paper is preferably in the range 20 to 50 sec/100 ml.
- the pigment is preferably one having a Mchs hardness of less than 7, for example kaolin, calcium carbonate in precipitated or ground form, titanium dioxide or barium sulphate. Pigments having a Mohs hardness greater than 7, such as alumina or hydrated alumina, various natural or synthetic alumino-silicates or silica or silica gel may however be used.
- the binder may be starch, casein, latex, polyvinyl alcohol or an aminoplast or other cross-linking resin.
- the liquid coating composition comprising the pigment and binder is applied by size press treatment, although other coating techniques may be used, for example air-knife coating. It will be appreciated that size press treatment normally results in a coating being applied to both surfaces of the paper web.
- the decorative laminate surface or overlay paper may be calendered before being impregnated.
- the present plastic base surface or overlay paper enables an improvement in print quality to be obtained as a result of more complete ink transfer from the gravure cells and of less ink absorption. It also permits a reduction in ink usage for a print of specified quality, or, for the same ink usage affords a better print than would be obtained on the same paper if it were not coated.
- a sheet of plastic base surface paper having a grammage of 100gm -2 was size press coated with an aqueous coating containing a mixture of kaolin (supplied by English China Clays under the designation "Supreme”), esterified starch and melamine-formaldehyde resin in a weight ratio of 3:1:0.001.
- the coating was then dried, the dry coatweight being 3gm -2 .
- the absorbency of both the coated and the uncoated paper was found to be 30mm/10 min.
- the Gurley porosity (20 oz) of the coated paper was found to be 24 sec/ 100 ml, and that of the uncoated paper was 18 sec/100 ml.
- Both the coated paper and a sample of uncoated plastic base surface paper were then printed with the same-amount of ink using a gravure printing process.
- the optical reflectivity of the uncoated paper (as measured by an Elrepho opacimeter) was 20% whereas that of the coated paper was 10%.
- Both papers absorbed a sufficient amount of resin to make satisfactory laminates and the colour or shade of the unprinted surface of a laminate containing the coated paper was judged to be the same as that of a laminate containing uncoated paper.
- a sheet of plastic base surface paper having a grammage of 120gm -2 was size press coated with an aqueous coating containing a mixture of barium sulphate (precipitated), esterified starch and melamine formaldehyde resin in a weight ratio of 3:1:0.001.
- the coating was then dried and calendered, the dry coatweight being 7gm -2 .
- the Gurley porosity (20 oz) of the coated paper was found to be 26 sec/100 ml, and that of the uncoated paper was 14 sec/100 ml.
- Both the coated paper and a sample of uncoated plastic base surface paper were then printed with the same amount of ink using a gravure printing nrocess.
- the optical reflectivity of the uncoated paper was 20% whereas that of the coated paper was 18%.
- Both papers absorbed a sufficient amount of resin to make satisfactory laminates and the colour or shade of the unprinted surface of a laminate containing the coated paper was judged to be the same as that of a laminate containing uncoated paper.
- a sheet of plastic base surface paper having a grammage of 120gm -2 was size press coated with an aqueous coating containing a mixture of titanium dioxide (supplied by British Titan Products, under the designation ALF), esterified starch and melamine formaldehyde resin in a weight ratio of 3:1:0.001.
- the coating was then dried and calendered, the dry coatweight being 6.6gm .
- the Gurley porosity (20 oz) of the coated paper was found to be 69 sec/100 ml, and that of the uncoated paper was 14 sec/100 ml.
- Both the coated paper and a sample of uncoated plastic base surface paper were then printed with the same amount of ink using a gravure printing process.
- the optical reflectivity of the uncoated paper was 20% whereas that of the coated paper was 17%.
- Both papers absorbed a sufficient amount of resin to make satisfactory laminates and the colour or shade of the unprinted surface of a laminate containing the coated paper was judged to be the same as that of a laminate containing uncoated paper.
- a sheet of plastic base surface paper having a grammage of 120gm -2 was size press coated with an aqueous coating containing a mixture of calcium carbonate (under the designation Hydrocarb) esterified starch and melamine formaldehyde resin in a weight ratio of 3:1:0.001.
- the coating was then dried and calendered, the dry coatweight being 5.5gm -2 .
- the Gurley porosity (20 oz) of the coated paper was found to be 50 sec/100 ml, and that of the uncoated paper was 14 sec/100 ml.
- Both the coated paper and a sample of uncoated plastic base surface paper were then printed with the -same amount of ink using a gravure printing process.
- the optical reflectivity of the uncoated paper was 20% whereas that of the coated paper was 17%.
- Both papers absorbed a sufficient amount of resin to make satisfactory laminates and the colour or shade of the unprinted surface of a laminate containing the coated paper was judged to be the same as that of a laminate containing uncoated paper.
Landscapes
- Laminated Bodies (AREA)
- Paper (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8039933 | 1980-12-12 | ||
GB8039933 | 1980-12-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0054405A1 true EP0054405A1 (fr) | 1982-06-23 |
EP0054405B1 EP0054405B1 (fr) | 1985-02-13 |
Family
ID=10517958
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19810305807 Expired EP0054405B1 (fr) | 1980-12-12 | 1981-12-09 | Procédé pour la préparation de stratifiés décoratifs |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0054405B1 (fr) |
JP (1) | JPS57501950A (fr) |
CA (1) | CA1170513A (fr) |
DE (1) | DE3168974D1 (fr) |
WO (1) | WO1982002067A1 (fr) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0122589A2 (fr) * | 1983-04-16 | 1984-10-24 | VITS-Maschinenbau GmbH | Procédé et appareil pour la fabrication de feuilles pour des applications de revêtement, en particulier des feuilles décoratives pour le revêtement des plaques en fibres dures, en copeaux ou en bois |
GR1000651B (el) * | 1990-12-27 | 1992-09-25 | Roltex A E | Μεθοδος και συσκευη παραγωγης υλης χαρτου/χαρτονομικου με πλαστικοποιησιν και ενιαιον χρωματισμον εκατερωθεν και ειδη παραγομενα εξ αυτης. |
WO1997015430A1 (fr) * | 1995-10-23 | 1997-05-01 | Maecher Pictureproducts Pty. Limited | Articles stratifies |
WO1997017214A1 (fr) * | 1995-11-10 | 1997-05-15 | Perstorp Ab | Procede de production d'articles a surface dure et decorative |
AU684426B2 (en) * | 1995-10-23 | 1997-12-11 | Maecher Pictureproducts Pty Limited | Laminated products |
WO1999001296A1 (fr) * | 1997-07-02 | 1999-01-14 | M. Kaindl | Materiau stratifie pourvu d'une decoration |
EP1044822A1 (fr) * | 1999-04-13 | 2000-10-18 | Technocell Dekor GmbH & Co. KG | Base d'une feuille décorative avec une couche qui accepte l'encre d'un appareil jet d'encre |
WO2004007215A1 (fr) * | 2002-07-17 | 2004-01-22 | Mw Custom Papers, Llc | Papier pour lamines decoratifs et leur procede de fabrication |
FR2870265A1 (fr) * | 2004-05-13 | 2005-11-18 | Arjowiggins Soc Par Actions Si | Papier decoratif et stratifie decoratif le comportant |
WO2009097986A1 (fr) | 2008-02-07 | 2009-08-13 | Hülsta-Werke Hüls Gmbh & Co. Kg | Couche de papier destinée à la fabrication d’un élément plat, imprimé ou imprimable |
EP2233287A1 (fr) * | 2009-03-24 | 2010-09-29 | Hülsta-Werke Hüls GmbH & CO. KG | Procédé de fabrication de corps de plaques dotés de feuilles imprimées selon le procédé d'impression en creux |
US10124603B2 (en) | 2014-02-06 | 2018-11-13 | Unilin, Bvba | Methods for manufacturing panels having a decorative surface |
US10214028B2 (en) | 2012-08-06 | 2019-02-26 | Unilin, Bvba | Method for manufacturing panels having a decorative surface |
US10471769B2 (en) | 2014-01-10 | 2019-11-12 | Unilin, Bvba | Method for manufacturing panels having a decorative surface |
EP3496945A4 (fr) * | 2016-08-10 | 2020-04-01 | Pressing Developments, L.L.C. | Produits stratifiés mélaminés pouvant être teints, compositions et procédés de fabrication |
US11794460B2 (en) | 2018-01-04 | 2023-10-24 | Flooring Industries Limited, Sarl | Methods for manufacturing panels |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06173199A (ja) * | 1992-12-04 | 1994-06-21 | Tomoegawa Paper Co Ltd | 殺菌紙 |
JP2599247B2 (ja) * | 1994-03-28 | 1997-04-09 | 南海プライウッド株式会社 | 化粧シート及び化粧板 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB653531A (en) * | 1948-02-14 | 1951-05-16 | Herbert John Mallabar | Improvements in the manufacture of decorative laminated sheet material |
FR1048836A (fr) * | 1949-06-30 | 1953-12-24 | Oxvar Ltd | Procédé de fabrication de pièces feuilletées décoratives |
US3578483A (en) * | 1969-05-14 | 1971-05-11 | Formica Corp | Process for improving the printability of the surface of alpha-cellulose paper to be used as the decorative sheet in a decorative laminate |
US3798111A (en) * | 1972-03-24 | 1974-03-19 | Mead Corp | Multiple layer decorated paper,laminates prepared therefrom and process |
AT332107B (de) * | 1974-09-25 | 1976-09-10 | Isovolta | Verfahren zur herstellung von schichtstoffdekorplatten |
FR2376746A1 (fr) * | 1977-01-10 | 1978-08-04 | Exxon Research Engineering Co | Feuilles pour stratifies decoratifs resistant a l'abrasion et leurs procedes de realisation |
GB2033249A (en) * | 1978-11-09 | 1980-05-21 | Nevamar Corp | Abrasion-resistant Laminate |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5245408B2 (fr) * | 1973-12-29 | 1977-11-16 |
-
1981
- 1981-12-09 WO PCT/GB1981/000266 patent/WO1982002067A1/fr unknown
- 1981-12-09 EP EP19810305807 patent/EP0054405B1/fr not_active Expired
- 1981-12-09 JP JP50003082A patent/JPS57501950A/ja active Pending
- 1981-12-09 DE DE8181305807T patent/DE3168974D1/de not_active Expired
- 1981-12-14 CA CA000392250A patent/CA1170513A/fr not_active Expired
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB653531A (en) * | 1948-02-14 | 1951-05-16 | Herbert John Mallabar | Improvements in the manufacture of decorative laminated sheet material |
FR1048836A (fr) * | 1949-06-30 | 1953-12-24 | Oxvar Ltd | Procédé de fabrication de pièces feuilletées décoratives |
US3578483A (en) * | 1969-05-14 | 1971-05-11 | Formica Corp | Process for improving the printability of the surface of alpha-cellulose paper to be used as the decorative sheet in a decorative laminate |
US3798111A (en) * | 1972-03-24 | 1974-03-19 | Mead Corp | Multiple layer decorated paper,laminates prepared therefrom and process |
AT332107B (de) * | 1974-09-25 | 1976-09-10 | Isovolta | Verfahren zur herstellung von schichtstoffdekorplatten |
FR2376746A1 (fr) * | 1977-01-10 | 1978-08-04 | Exxon Research Engineering Co | Feuilles pour stratifies decoratifs resistant a l'abrasion et leurs procedes de realisation |
GB2033249A (en) * | 1978-11-09 | 1980-05-21 | Nevamar Corp | Abrasion-resistant Laminate |
Cited By (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0122589A2 (fr) * | 1983-04-16 | 1984-10-24 | VITS-Maschinenbau GmbH | Procédé et appareil pour la fabrication de feuilles pour des applications de revêtement, en particulier des feuilles décoratives pour le revêtement des plaques en fibres dures, en copeaux ou en bois |
EP0122589A3 (en) * | 1983-04-16 | 1984-11-28 | Vits-Machinenbau Gmbh | Process and apparatus for manufacturing sheets for coating purposes, in particular decorative sheets for coating hard fibre, chip or wood board |
GR1000651B (el) * | 1990-12-27 | 1992-09-25 | Roltex A E | Μεθοδος και συσκευη παραγωγης υλης χαρτου/χαρτονομικου με πλαστικοποιησιν και ενιαιον χρωματισμον εκατερωθεν και ειδη παραγομενα εξ αυτης. |
WO1997015430A1 (fr) * | 1995-10-23 | 1997-05-01 | Maecher Pictureproducts Pty. Limited | Articles stratifies |
AU684426B2 (en) * | 1995-10-23 | 1997-12-11 | Maecher Pictureproducts Pty Limited | Laminated products |
WO1997017214A1 (fr) * | 1995-11-10 | 1997-05-15 | Perstorp Ab | Procede de production d'articles a surface dure et decorative |
WO1999001296A1 (fr) * | 1997-07-02 | 1999-01-14 | M. Kaindl | Materiau stratifie pourvu d'une decoration |
EP1044822A1 (fr) * | 1999-04-13 | 2000-10-18 | Technocell Dekor GmbH & Co. KG | Base d'une feuille décorative avec une couche qui accepte l'encre d'un appareil jet d'encre |
US6706372B2 (en) | 1999-04-13 | 2004-03-16 | Technocell Dekor Gmbh & Co. Kg | Decorative base paper with an ink-jet receiving layer |
WO2004007215A1 (fr) * | 2002-07-17 | 2004-01-22 | Mw Custom Papers, Llc | Papier pour lamines decoratifs et leur procede de fabrication |
FR2870265A1 (fr) * | 2004-05-13 | 2005-11-18 | Arjowiggins Soc Par Actions Si | Papier decoratif et stratifie decoratif le comportant |
WO2005116337A1 (fr) | 2004-05-13 | 2005-12-08 | Arjowiggins | Procede de fabrication de papier decoratif et stratifie decoratif comportant un tel papier decoratif |
US9567713B2 (en) | 2004-05-13 | 2017-02-14 | Munksjo Arches | Method of producing decorative paper and decorative laminate comprising such decorative paper |
WO2009097986A1 (fr) | 2008-02-07 | 2009-08-13 | Hülsta-Werke Hüls Gmbh & Co. Kg | Couche de papier destinée à la fabrication d’un élément plat, imprimé ou imprimable |
WO2010108568A1 (fr) * | 2009-03-24 | 2010-09-30 | Hülsta-Werke Hüls Gmbh & Co. Kg | Procédé de fabrication de corps en forme de plaque comprenant des feuilles imprimées par héliogravure |
EP2233287A1 (fr) * | 2009-03-24 | 2010-09-29 | Hülsta-Werke Hüls GmbH & CO. KG | Procédé de fabrication de corps de plaques dotés de feuilles imprimées selon le procédé d'impression en creux |
US10814648B1 (en) | 2012-08-06 | 2020-10-27 | Unilin, Bvba | Method for manufacturing panels having a decorative surface |
US11987044B2 (en) | 2012-08-06 | 2024-05-21 | Unilin, Bv | Method for manufacturing panels having a decorative surface |
US10214028B2 (en) | 2012-08-06 | 2019-02-26 | Unilin, Bvba | Method for manufacturing panels having a decorative surface |
US11446938B2 (en) | 2012-08-06 | 2022-09-20 | Flooring Industries Limited, Sarl | Method for manufacturing panels having a decorative surface |
US10549550B2 (en) | 2012-08-06 | 2020-02-04 | Unilin, Bvba | Method for manufacturing panels having a decorative surface |
US10807385B2 (en) | 2012-08-06 | 2020-10-20 | Unilin, Bvba | Method for manufacturing panels having a decorative surface |
US10906349B2 (en) | 2014-01-10 | 2021-02-02 | Unilin Bv | Method for manufacturing panels having a decorative surface |
US10471769B2 (en) | 2014-01-10 | 2019-11-12 | Unilin, Bvba | Method for manufacturing panels having a decorative surface |
US11465439B2 (en) | 2014-01-10 | 2022-10-11 | Flooring Industries Limited, Sarl | Method for manufacturing panels having a decorative surface |
US11878548B2 (en) | 2014-01-10 | 2024-01-23 | Flooring Industries Limited, Sarl | Method for manufacturing panels having a decorative surface |
US10994555B2 (en) | 2014-02-06 | 2021-05-04 | Unilin Bv | Methods for manufacturing panels having a decorative surface |
US11613133B2 (en) | 2014-02-06 | 2023-03-28 | Unilin Bv | Methods for manufacturing panels having a decorative surface |
US10124603B2 (en) | 2014-02-06 | 2018-11-13 | Unilin, Bvba | Methods for manufacturing panels having a decorative surface |
EP3496945A4 (fr) * | 2016-08-10 | 2020-04-01 | Pressing Developments, L.L.C. | Produits stratifiés mélaminés pouvant être teints, compositions et procédés de fabrication |
US11794460B2 (en) | 2018-01-04 | 2023-10-24 | Flooring Industries Limited, Sarl | Methods for manufacturing panels |
Also Published As
Publication number | Publication date |
---|---|
WO1982002067A1 (fr) | 1982-06-24 |
JPS57501950A (fr) | 1982-11-04 |
DE3168974D1 (en) | 1985-03-28 |
EP0054405B1 (fr) | 1985-02-13 |
CA1170513A (fr) | 1984-07-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): DE FR GB IT |
|
17P | Request for examination filed |
Effective date: 19820719 |
|
ITF | It: translation for a ep patent filed |
Owner name: JACOBACCI & PERANI S.P.A. |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
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AK | Designated contracting states |
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