[go: up one dir, main page]

EP0587692B1 - Papier pour copie sous forme de feuilles - Google Patents

Papier pour copie sous forme de feuilles Download PDF

Info

Publication number
EP0587692B1
EP0587692B1 EP92911826A EP92911826A EP0587692B1 EP 0587692 B1 EP0587692 B1 EP 0587692B1 EP 92911826 A EP92911826 A EP 92911826A EP 92911826 A EP92911826 A EP 92911826A EP 0587692 B1 EP0587692 B1 EP 0587692B1
Authority
EP
European Patent Office
Prior art keywords
paper
parts
copying
calcium carbonate
copying paper
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
EP92911826A
Other languages
German (de)
English (en)
Other versions
EP0587692A1 (fr
Inventor
Nils Ake Karlin
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.)
Mo och Domsjo AB
Original Assignee
Mo och Domsjo AB
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 Mo och Domsjo AB filed Critical Mo och Domsjo AB
Publication of EP0587692A1 publication Critical patent/EP0587692A1/fr
Application granted granted Critical
Publication of EP0587692B1 publication Critical patent/EP0587692B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
    • D21H21/52—Additives of definite length or shape
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/385—Oxides, hydroxides or carbonates
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/84—Paper comprising more than one coating on both sides of the substrate
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G7/00—Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
    • G03G7/0006—Cover layers for image-receiving members; Strippable coversheets
    • G03G7/0013—Inorganic components thereof
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G7/00—Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
    • G03G7/006—Substrates for image-receiving members; Image-receiving members comprising only one layer

Definitions

  • the present invention relates to copying paper in sheet form having a surface weight of from 80 to 200 g/m 2 .
  • the copying paper is comprised of specific base paper and coating layer applied to at least one side of the base paper, preferably to both sides thereof.
  • the coating layer has a surface weight of 12-18 g/m 2 , which means, that the paper is fully coated, i.e. essentially the whole of the surface of the paper is covered with the coating layer.
  • the above mentioned range of surface weight of from 80 to 200 g/m 2 refers to the surface weight of the base paper plus the surface weight of the coating layer, alternatively, of the coating layers.
  • the present invention provides a solution to the aforesaid problems and relates to a copying paper which comprises a base paper based on a fibre starting material of which at least 60% is comprised of short fibre pulp refined to 17-22°SR and of at least 20% long fibre pulp refined to 25-38° SR, together with filler in an amount of 19-28%, calculated on the base paper, and on at least one side of the base paper a coating layer of a surface weight of 12-18 g/m 2 , the base component(s) of the coating layer including either a) 100 parts of calcium carbonate distributed according to 60-80 parts of calcium carbonate of which 90% have a particle size beneath 2 ⁇ m and 40-20 parts of calcium carbonate of which 95% have a particle size beneath 2 ⁇ m; or b) 60-90 parts of calcium carbonate of which 90% have a particle size beneath 2 ⁇ m and 40-10 parts of kaolin clay of selected particle size quality; and the surface coating also including at least binder and hardener.
  • the binder preferably consists of starch and/or latex. It is especially preferred that the starch is oxidized and that the latex is of the open styrene butadiene type.
  • the starch is preferably added in an amount of 5-7% calculated on dry pigment or base component(s).
  • Latex is preferably added in an amount of 6-8%, calculated on dry pigment or base component(s). This applies to the addition of both of these chemicals to the coating color and later the paper. If only one of these chemicals is used, the aforesaid quantity must be increased. It is preferred that the hardener is free from formalin. For instance, glyoxal can be used in an amount of 0.5-1.5% calculated on dry pigment or base component(s).
  • hardeners that can be used are ammonium zirconium carbonate, ethanedial, which is a polymer containing tetra-hydro-4-hydroxy-5-methyl-2-(1H) pyrimidinone and which is propoxylated and a hardener retailed under the trade name Nopcote 1670 which contains an imidazoline compound, which is a reaction product of glyoxal and urea.
  • ammonium zirconium carbonate ethanedial
  • Nopcote 1670 which contains an imidazoline compound, which is a reaction product of glyoxal and urea.
  • the coating layer, and therewith the paper contains 1-3 parts of stearate, preferably calcium stearate or ammonium stearate, calculated on 100 parts of base component(s).
  • the dry solids content of the coating color, and therewith also of the newly applied coating layer shall lie within the range 65-70%.
  • the copying paper shows a coating layer on its both sides.
  • the filler present in the copying paper may be any known filler whatsoever, although calcium carbonate is preferred.
  • Coating colors of the aforedescribed kind primarily result in a mat paper, i.e. a paper whose gloss is beneath 20% measured in accordance with Lehman (70-degree incident light).
  • the composition of the coating color will differ slightly from the composition which provides an optimal mat copying paper and possibly prefers an extra chemical addition.
  • the copying paper according to the invention has good printability as well as good runability in copying machines.
  • By choosing the correct base paper and a coating layer of correct composition it has been found possible to achieve the same reliability in the copying machine with regard to preprinted copying paper as that achieved with conventional copying paper.
  • the frequency at which stoppages occur in the machine when using the copying paper according to the invention is extremely low.
  • the paper according to the invention can be run efficiently and effectively through copying machines as unprinted paper.
  • the chemicals from which the coating layer is comprised are relatively inexpensive in combination, therewith enabling the price of the copying paper to be kept at a relatively low level.
  • the fibre composition of the base paper shall comprise at least 60% of short fibre pulp and at least 20% of long fibre pulp.
  • short fibre pulp is meant chemical pulp, preferably sulphate pulp, manufactured for instance from hardwood, such as birch, eucalyptus, beech, aspen, and similar types of wood.
  • long fibre pulp is meant chemical pulp, preferably sulphate pulp, manufactured for instance from softwood, such as pine, spruce, and other types of wood.
  • Another usable chemical pulp is sulphite pulp.
  • the remaining 20% of the fibre composition may consist of one of the two aforesaid types of pulp or of a mixture thereof. It is also fully possible to mix in other types of pulps, such as sulphite pulp and/or high yield pulp, such as mechanical pulp for instance.
  • the fibre composition of the base paper, refinement of the different pulps and the filler content of the paper shall be adapted so that the finished paper has low curling tendencies (reactivity). By curling is meant that the paper deviates from the flat shape and adopts varying curved shapes.
  • the pulps shall be refined only to a moderate extent, i.e. the paper shall be imparted other refinement dependent properties to the best possible extent, while at the same time fulfilling the aforesaid conditions.
  • the various pulps are refined separately to the refinement levels earlier mentioned in °SR, i.e. degrees Schopper-Riegler.
  • the filler shall be present in an amount of 19-28%, preferably 20-25%, calculated on the base paper.
  • the filler is preferably calcium carbonate in different forms, such as chalk, ground marble and calcium carbonate precipitates. It is also possible, however, to use other fillers, either totally or partially, such as kaolin clay, talcum and gypsum (CaSO 4 ).
  • the manner in which the base paper is constructed and produced is highly significant to the ability to run the finished paper in copying machines.
  • the composition of the coating layer is highly significant to the runability of the paper in copying machines, and sometimes a decisive significance.
  • the quantity of coating substance applied is also significant to some extent.
  • the coating layer or layers of the inventive copying paper is/are produced from one of two coating colors.
  • the pigment or base component of one color consists of 100 parts calcium carbonate.
  • Calcium carbonate having different particle size distributions is available and the calcium carbonate is said to have different degrees of fineness, such as fine, superfine, etc.
  • 60-80 parts of such calcium carbonate is used, of which 90% of the particles have a size beneath 2 um and 40-20 parts of a still finer calcium carbonate, namely a calcium carbonate of which 95% of the particles have a size beneath 2 um.
  • the color may also include an optical whitener, different types of tinting colours, and a substance for adjusting the pH of the color. Examples of such substances include sodium hydroxide and ammonium.
  • the amounts in which the binder and hardener are present have been given in the aforegoing.
  • the remaining chemicals are present in a very small quantity, i.e. in an amount of 1 part or less. Additional chemicals may also be added to the color.
  • the pigment or base component of the other color comprises 60-90 parts calcium carbonate, where 90% of the particles have a size smaller than 2 um, and 40-10 parts of kaolin clay of SPS quality.
  • SPS is an acronym of the English language designation "selected particle size".
  • This color also includes binder and hardener in the aforesaid quantities.
  • the color may also include an optical whitener, tinting color and an alkali for adjusting the pH of the color, etc.
  • the color will also preferably include a comparatively large quantity of stearate. Mentioned additive has been found to provide the copying paper with good runability in copying machines. The stearate probably assists in imparting the correct surface property to the paper and above all the correct friction. Stearate may also be added to the first color.
  • starch as a binder in top coatings is normally avoided, since starch causes pronounced binder migration, which results in mottling.
  • starch causes pronounced binder migration, which results in mottling.
  • One advantage afforded by the addition of starch is that the paper obtains good stiffness and good toner adhesion, and starch also prevents the paper from becoming sticky and adhering to copying machine surfaces when it is exposed to high temperatures. It is not thought that stearate has earlier been used in coating colors in the aforesaid quantities.
  • both sides of the copying paper are provided with a coating layer.
  • the paper is coated in a two station coating machine.
  • the coating color shall have a relatively high dry solids content, namely within the interval 65-70%.
  • the paper is dried first on the one coated side and then on the other side.
  • the first coated side of the paper is dried in a manner such that the paper will include 6-9% water and drying of the other side of the paper is continued until the paper has a water content of 4-5%.
  • a base paper was produced on a 6.5 m wide Valmet type paper machine in the following manner :
  • Birch sulphate pulp 70%
  • pine sulphate pulp 24%
  • spruce sulphite pulp 6%.
  • Filler mainly calcium carbonate, was supplied in an amount of 21.2% in finished paper. 131 kg of filler were supplied for each tonne of paper in dispersion while the remaining filler was supplied via incoming paper broke.
  • the paper was surface sized with an 8%-surface sizing starch in a quantity of about 3 g/m 2 .
  • the aforedescribed base paper had a surface weight of 97 g/m 2 and the coating colors A, B and C were applied to the paper.
  • the coating color A was applied to the base paper both in a pilot coating machine and in a full scale test, whereas the coating colors B and C were applied to the base paper solely in the pilot coating machine.
  • the three coating colors had the following compositions.
  • the color had a dry solids content of 65%.
  • the color had a dry solids content of 68%.
  • the coatings were applied under realistic conditions, partly on a pilot coating machine (the colors A, B and C) having curved blades, at a speed of 800 m/minute and partly on a full-scale Jagenberg coating machine (color A) having a width of 3.3 m and curved blads at a speed of 800 m/- minute.
  • the base paper was coated on both sides in all instances, with an amount of color corresponding to 16 g/m 2 .
  • the finished, coated paper had a surface weight of 130 g/m 2 . All paper coated had a mat finish according to the earier given definition.
  • the friction between the feed belt and the paper shall be greater than the friction between the retard belt and the paper, which in turn shall be greater than the friction between paper and paper.
  • Table 2 Friction in grams Test Color Static/Kinetic Difference Full Scale A 110/80 30 Pilot A 83/60 23 Pilot B 122/94 28 Pilot C 66/65 1
  • the first three papers in the above Tables are in accordance with the invention, whereas the fourth paper was not, i.e. the coating color C was applied to this fourth paper.
  • the difference between the static and kinetic friction of the inventive papers is 23 or more, whereas the corresponding difference of the non inventive paper (0-sample) is as small as 1.
  • a standard has been set whereby 5 000 copies (simplex) and 3 000 copies (duplex) can be copied in sequence without causing a machine stoppage.
  • simplex is meant that copies are made on only one side of the paper, while duplex means that copies are made on both sides of the paper.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dispersion Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)
  • Photographic Developing Apparatuses (AREA)
  • Laminated Bodies (AREA)
  • Electrotherapy Devices (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)

Claims (9)

  1. Papier de copie comprenant une base de papier réalisée en matière fibreuse et comprenant au moins 60% de pulpe à fibres courtes raffinée à 17-22°SR, et au moins 20% de pulpe à fibres longues raffinées à 25-38°SR et un remplisseur dans une proportion de 19-28%, calculée sur la base de papier et, sur au moins un côté de la base de papier, une couche de revêtement dont le grammage est compris entre 12 et 18 g/m2, le(s) composant(s) de base de la couche de revêtement incluant :
    a) 100 parties de carbonate de calcium comprenant 60 à 90 parties de carbonate de calcium duquel 90% a une taille de particules inférieure à 2 µm, et 40 à 20 parties de carbonate de calcium dont 95% a une taille de particules inférieure à 2 µm;
    ou
    b) 60 à 90 parties du carbonate de calcium dont 90% a une taille de particules inférieure à 2 µm et 40 à 10 parties de kaolin à taille de particules sélectionnées, le revêtement de surface incluant également au moins un liant et un durcisseur.
  2. Papier de copie selon la revendication 1, dans lequel le liant consiste en de l'amidon et/ou du latex.
  3. Papier de copie selon la revendication 2, caractérisé en ce que l'amidon est oxydé et que le latex est de type butadiène styrène ouvert.
  4. Papier de copie selon la revendication 1, dans lequel le durcisseur ne contient de formol.
  5. Papier de copie selon les revendications 1 à 4, dans lequel la couche de revêtement inclût une à trois parties de stéarate, de préférence du stéarate de calcium ou d'ammonium, pour 100 parties de composant(s) de base.
  6. Papier de copie selon les revendications 1 à 5, dans lequel, lorsqu'elle est nouvellement appliquée, la couche de revêtement a un contenu en matière sèche de 65 à 70%.
  7. Papier de copie selon les revendications 1 à 6, dans lequel la couche de revêtement est appliquée des deux côtés de la base en papier.
  8. Papier de copie selon les revendications 1 à 7, dans lequel le remplisseur est du carbonate de calcium.
  9. Papier de copie selon les revendications 1 à 8, dans lequel le papier est converti en feuilles avant d'effectuer une copie.
EP92911826A 1991-06-05 1992-06-05 Papier pour copie sous forme de feuilles Expired - Lifetime EP0587692B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9101699A SE468531C (sv) 1991-06-05 1991-06-05 Kopieringspapper i arkform
SE9101699 1991-06-05
PCT/SE1992/000385 WO1992022016A1 (fr) 1991-06-05 1992-06-05 Papier pour copie sous forme de feuilles

Publications (2)

Publication Number Publication Date
EP0587692A1 EP0587692A1 (fr) 1994-03-23
EP0587692B1 true EP0587692B1 (fr) 1997-03-05

Family

ID=20382930

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92911826A Expired - Lifetime EP0587692B1 (fr) 1991-06-05 1992-06-05 Papier pour copie sous forme de feuilles

Country Status (9)

Country Link
EP (1) EP0587692B1 (fr)
AT (1) ATE149702T1 (fr)
DE (1) DE69217942T2 (fr)
DK (1) DK0587692T3 (fr)
ES (1) ES2098513T3 (fr)
FI (1) FI103366B (fr)
NO (1) NO307487B1 (fr)
SE (1) SE468531C (fr)
WO (1) WO1992022016A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7758690B2 (en) 2002-05-03 2010-07-20 Imerys Minerals, Ltd. Paper coating pigments

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4324028C1 (de) * 1993-07-17 1994-12-01 Feldmuehle Ag Stora Beidseitig gestrichenes Rollendruckpapier und Verfahren zu seiner Herstellung
JP3464723B2 (ja) * 1994-12-20 2003-11-10 富士ゼロックス株式会社 電子写真用転写紙
DE19601245A1 (de) * 1996-01-16 1997-07-17 Haindl Papier Gmbh Rollendruckpapier mit Coldset-Eignung und Verfahren zu dessen Herstellung
WO2000004231A1 (fr) * 1998-07-17 2000-01-27 Ecc International Ltd Materiaux de pigmentation et leur mise en application dans des compositions de revetement
FI118973B (fi) 2006-08-24 2008-05-30 Stora Enso Oyj Menetelmä adheesion hallitsemiseksi paperi- tai pahvisubstraatissa
US10647143B2 (en) 2014-05-26 2020-05-12 Omya International Ag Calcium carbonate for rotogravure printing medium
DK2949477T3 (en) 2014-05-26 2017-03-06 Omya Int Ag Calcium carbonate for rotogravure printing media
BR102017028522A2 (pt) * 2017-12-28 2019-07-16 Klabin S/A Papel kraftliner de fibra química curta

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1210391A (en) * 1967-02-08 1970-10-28 English Clays Lovering Pochin Improvements in or relating to the coating of paper
DE2808425A1 (de) * 1978-02-27 1979-08-30 Pluss Stauffer Ag Mineralischer fuellstoff
FR2440436A1 (fr) * 1978-10-30 1980-05-30 Omya Sa Procede de couchage du papier avec un carbonate de calcium naturel comme pigment unique
DE2943652C2 (de) * 1979-10-29 1985-12-12 Plüss-Staufer AG, Oftringen, Aargau Mineralischer Füllstoff in Form von natürlichem Calciumcarbonat
JPS57176297A (en) * 1981-04-24 1982-10-29 Kanzaki Paper Mfg Co Ltd Coating composition for coated paper

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7758690B2 (en) 2002-05-03 2010-07-20 Imerys Minerals, Ltd. Paper coating pigments

Also Published As

Publication number Publication date
FI103366B1 (fi) 1999-06-15
DK0587692T3 (da) 1997-07-21
EP0587692A1 (fr) 1994-03-23
FI103366B (fi) 1999-06-15
SE9101699D0 (sv) 1991-06-05
SE468531B (sv) 1993-02-01
ES2098513T3 (es) 1997-05-01
DE69217942D1 (de) 1997-04-10
NO934400L (no) 1993-12-03
SE468531C (sv) 1995-06-12
WO1992022016A1 (fr) 1992-12-10
DE69217942T2 (de) 1997-10-16
FI935441L (fi) 1993-12-03
NO934400D0 (no) 1993-12-03
NO307487B1 (no) 2000-04-10
ATE149702T1 (de) 1997-03-15
SE9101699L (sv) 1992-12-06
FI935441A0 (fi) 1993-12-03

Similar Documents

Publication Publication Date Title
DE69609899T2 (de) Papier zweckdienlich für ein Tintenstrahl- oder elektrophotographisches Druckverfahren
CA2096738C (fr) Papier et methode de fabrication du papier
DE69403123T2 (de) Pyridinium- und/oder Piperaziniumverbindungen enthaltende Aufzeichnungsschichten
DE69403124T2 (de) Tetrazolium-, Indolinium, Imidazol- und Imidazoliniumverbindungen enthaltende Aufzeichnungsschichten
EP0777014A2 (fr) Pigments pour compositions d'enduction de papier
EP0262983B1 (fr) Papier à deux couches
JP3050381B2 (ja) コールドセットに適性を有するウェブ被覆記録紙
EP0587692B1 (fr) Papier pour copie sous forme de feuilles
JPH02169798A (ja) 新聞印刷用紙
KR20050107579A (ko) 오프셋 인쇄용 신문용지
EP1036881B1 (fr) Papier de base pour décoration ayant une résistance à sec améliorée
FI114326B (fi) Syväpainokelpoinen paperi
EP1855891B1 (fr) Papier d'impression et procédé permettant de produire ce papier
EP0879917B1 (fr) Composition pour le traitement du papier
US5284813A (en) First sheet for copysets
US5314753A (en) Printing paper and a process for its manufacture
FI98235C (fi) Painopaperi, menetelmä sen valmistamiseksi ja sen käyttö
KR100255041B1 (ko) 칼라잉크젯용용지의제조방법
TW405003B (en) Method of making paper and a paper grade made using the method
JPH07156537A (ja) 記録用紙
DE68912688T2 (de) Druckempfindliches Aufzeichnungspapier.
JPH10305656A (ja) 情報記録用紙
US2640790A (en) Coated paper and process for making same
Anderson Surface sizing
Schmidt‐Thümmes et al. Applications in the paper industry

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

17P Request for examination filed

Effective date: 19931203

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB IT LI NL

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 19960916

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB IT LI NL

REF Corresponds to:

Ref document number: 149702

Country of ref document: AT

Date of ref document: 19970315

Kind code of ref document: T

ITF It: translation for a ep patent filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69217942

Country of ref document: DE

Date of ref document: 19970410

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2098513

Country of ref document: ES

Kind code of ref document: T3

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: E. BLUM & CO. PATENTANWAELTE

ET Fr: translation filed
REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20040615

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20040616

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20040618

Year of fee payment: 13

Ref country code: FR

Payment date: 20040618

Year of fee payment: 13

Ref country code: ES

Payment date: 20040618

Year of fee payment: 13

Ref country code: DK

Payment date: 20040618

Year of fee payment: 13

Ref country code: AT

Payment date: 20040618

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20040628

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20040713

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050605

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050605

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050606

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050630

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050630

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050630

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060103

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060228

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20050605

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20060101

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20060228

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20050606

BERE Be: lapsed

Owner name: *MO OCH DOMSJO A.B.

Effective date: 20050630