EP1135556B1 - Uncoated paper comprising a pseudo-watermark and method for making same - Google Patents

Uncoated paper comprising a pseudo-watermark and method for making same Download PDF

Info

Publication number
EP1135556B1
EP1135556B1 EP99973085A EP99973085A EP1135556B1 EP 1135556 B1 EP1135556 B1 EP 1135556B1 EP 99973085 A EP99973085 A EP 99973085A EP 99973085 A EP99973085 A EP 99973085A EP 1135556 B1 EP1135556 B1 EP 1135556B1
Authority
EP
European Patent Office
Prior art keywords
paper
areas
area
uncoated
rest
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
EP99973085A
Other languages
German (de)
French (fr)
Other versions
EP1135556A1 (en
Inventor
Michel Goguelin
Henri Rosset
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.)
ArjoWiggins SAS
Original Assignee
ArjoWiggins SAS
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 ArjoWiggins SAS filed Critical ArjoWiggins SAS
Publication of EP1135556A1 publication Critical patent/EP1135556A1/en
Application granted granted Critical
Publication of EP1135556B1 publication Critical patent/EP1135556B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/10—Watermarks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/24—Pressing or stamping ornamental designs on surfaces
    • 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
    • D21H27/02—Patterned paper
    • 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
    • D21H21/14—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 function or properties in or on the paper
    • D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
    • 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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • 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
    • D21H27/30—Multi-ply
    • 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
    • D21H27/30—Multi-ply
    • D21H27/32—Multi-ply with materials applied between the sheets

Definitions

  • the present invention relates to an uncoated paper comprising at least one pseudo-watermark consisting of a mark giving the said paper a visual effect and a texture resembling that of a watermark.
  • the present invention also relates to a method for manufacturing a non-paper coated according to the invention.
  • Watermarked papers are generally used in the field of security papers such as means of payment such as banknotes or checks, check letters and official documents like passports, identity cards, stamped papers, notarial acts, or entry tickets to cultural or sporting events because the presence of the watermark limits the possibilities of photocopying and counterfeiting, and offers a means of recognizing and / or authenticating said paper.
  • the papers watermarks are also used in the field of personalized company papers in using the company's logo, name or brand as a watermark. he can it turns out that these watermarked papers are requested in very small tonnages and / or in short manufacturing times.
  • W097 / 17493 describes papers coated with pseudo-watermarks resulting from a variation in the layer weight applied in specific areas which induces a variation in thickness and opacity in the said zones where the layer weight is reduced or increased.
  • An object of the present invention is to provide uncoated paper having pseudo-watermarks consisting of marks which locally modify the physical characteristics of the paper such as its mass volume and therefore certain properties such as its thickness and possibly its opacity.
  • Another object of the present invention is to provide an uncoated paper having pseudo-watermarks consisting of marks which create a shade contrast with the rest of the sheet of paper.
  • Another object of the present invention is to provide an uncoated paper comprising pseudo-watermarks produced without using a varnish on its surface so that the composition of the paper in the areas constituting the pseudo-watermark is not significantly changed.
  • Another object of the present invention is to provide uncoated paper with pseudo-watermarks whose usage properties, in particular printability properties in the areas of the paper surface corresponding to the said marks, are not significantly altered compared to other areas not marked by a so-called pseudo paper watermark.
  • Another object of the present invention is to provide an uncoated paper having pseudo-watermarks that can be manufactured in variable and small quantities in more economical conditions than by the processes of the prior art and which can be obtained in widths and quantities independent of the characteristics of the paper machine, in particular by a process whose implementation of the machines does not modify the operation of actual paper manufacturing.
  • Another object of the present invention is to provide an uncoated paper having a pseudo-watermark in which said watermark is produced after the last operation of manufacturing, that is to say at the end of the drying season, possibly on the finished paper, that is to say off-line manufacturing.
  • the present invention provides an uncoated paper comprising at least a mark resembling a watermark characterized in that one or more determined area (s) of paper have a reduction in thickness compared to the rest of uncoated paper, the areal mass in said area or areas of the paper being identical to that of the rest of the paper, according to claim 11.
  • the grammages are identical in the said zone or zones and in the rest of the paper, it being understood that the variation in weight which may result from the presence of an additive not evaporated from the rewetting solution is not significant.
  • the one or more zones have a reduction in opacity compared to the rest of the paper.
  • the said zone or zones have a color in particular a shade and / or a brightness, different from that of the rest of the paper.
  • the paper may have a reduction in thickness and opacity in the said zone or zones relative to the rest of the paper.
  • the paper may have, in the said zone or zones, agents chosen from coloring agents, fluorescent agents, agents inhibiting fluorescence, agents allowing recognition or authentication. These agents may have been deposited by incorporating the rewetting solution, described below, containing them and remaining after evaporation of the solution. Anti-forgery agents or are well known to those skilled in the art in the field of papers fiduciary and security.
  • the paper can comprise two or more fibrous jets.
  • only one of the surface jets has a reduction in thickness and / or a difference of shade and / or luminosity in the said zone or zones relative to the rest of the multijet paper.
  • the paper can comprise two or more sheets of paper laminated.
  • the lamination adhesive is colored. In a mode of only a sheet of laminated paper has a reduction in thickness and / or a difference in shade and / or difference in brightness in the said zone or zones with respect to to the rest of the laminated paper.
  • uncoated paper means that the paper is not coated with a pigmented layer comprising at least fine mineral pigments, in particular kaolin and / or calcium carbonate, and at least one binder or adhesive. , in particular starch or latex, as well as, optionally, any additives commonly used by those skilled in the art, the function of which is to improve the rheological properties of the sauce and to confer particular properties on the layer.
  • the paper can be impregnated or surface treated with a non-pigmented composition such as a sizing composition, in particular to improve its printability, and / or its mechanical resistance and / or its resistance to soiling and / or its bactericidal properties.
  • rewetted paper is meant that, in the said zone or zones, the rewetting solution has penetrated inside the paper and has not yet evaporated.
  • said rewetting solution is evaporated and the paper is densified in the areas where said solution was initially applied. This results in an increase in the density of the paper in said areas relative to the rest of the sheet of paper and more precisely a reduction in thickness with a surface mass identical to that of the rest of the paper.
  • Said zones can then present an opacity contrast (reduction of opacity) and / or a color contrast, in particular of color nuance and brightness with the rest of the sheet of paper.
  • the opacity of the paper is partly linked to the presence of air in the fibrous interstices and / or paper pigments.
  • the solution replaces the air in said interstices.
  • the solution is evaporated and the fibers and / or the pigments being densified, the air gaps generally occupy a reduced volume and in particular are found in smaller quantities than initially, which generates a disseminationopacification.
  • the densification of the paper comes from a reduction in thickness of the treated areas compared to the rest of the paper, the surface mass remaining constant relative to the rest of the paper.
  • the surface mass is less in the areas clear because the fibers deposited are in smaller quantity compared to the rest of the sheet.
  • the surface mass is not constant because the weight of the layer is reduced in certain areas.
  • Rewetting the paper facilitates rearrangement of the fibers and / or pigments during calendering.
  • There may be additives in the rewetting solution which facilitate the rearrangement of fibers and / or pigments and / or which favor the greater or lesser penetration of said solution into the paper.
  • the method of the present invention can also create a modification of the color of the paper in said zone or zones when said rewetting solution comprises a coloring agent, in particular a tinting coloring agent.
  • a coloring agent in particular a tinting coloring agent.
  • the color contrast in the said zone or zones may also result from the modification of the opacity in one of the surface jets when it exists a difference in shade initially between said surface jet and the jet linked to it.
  • the method according to the present invention applies to all uncoated, white papers or colored, without limitation of grammage, possibly laminated or multijet.
  • step (b) said pressure and said heat by calendering the paper.
  • the calender rollers can be heated but in any event the friction produced by the grille generates heat.
  • the calendering operation is carried out according to the present invention with calenders known to those skilled in the art.
  • the calenders can be of the supercalender, soft calender (also called elastic) or smooth type. They consist of several rollers, the number and nature of the material constituting them vary depending on the purpose and the paper to be treated.
  • the goal is to flatten the paper surfaces, by more or less strong compression of the sheet between the rollers and by the more or less large extent of the contact area between the rollers and the sheet, in order to give them a certain "Smoothed" as well as a certain softness to the touch and a good aptitude for writing and printing.
  • the ridges and reliefs are flattened more or less strongly at the time of the passage between the rollers and the sheet is densified.
  • the purpose of calendering can also be to make the surfaces shiny or satin.
  • the calender rolls are made of hardened cast iron or steel, some of which can be covered with a fabric, cardboard or plastic for example to make elastic rollers.
  • the supercalender which has a large number of rollers (of the order of 12 or more) is often located outside the machine because of maintenance, changing of the rollers and sheet breaks.
  • the soft grille can be located on the paper machine, the number of rollers is lower and some are elastic.
  • the boom is located on a machine and has a few rollers often made of steel and is not covered.
  • the linear pressure exerted between the rollers on the paper is of the order of 0.5 to 5000 kN / cm.
  • the temperature of the rollers when heated can be 50 to 300 ° C.
  • the different parameters of the calendering such as temperature, hardness of the rollers, possibly coating of rollers, the extent of the contact area between the rollers and the sheet as well as the pressure are chosen according to the nature of the desired final contrast.
  • These different parameters are adapted according to the calendering speed, which is controlled by the speed application of the rewetting solution.
  • a calender is used comprising 2 to 6 rolls and if necessary with a plastic coating (for its impermeability to rewetting solution).
  • the mark can correspond to the said zone or zones and constitute a given pattern appearing in positive contrast with respect to the rest of the sheet of paper not rewetted.
  • the given pattern can appear by contrast in negative since the mark would correspond to the remainder of the sheet of paper not treated, i.e. not rewetted initially.
  • the said zone or zones may define a visual pattern in observation in transmitted light resulting from a reduction opacity in the said zone or zones.
  • the said zone or zones can also define a visual pattern by observation in reflected light resulting from a difference in color of said one or more areas.
  • said mark corresponds to the said area or areas treated
  • step (a) is carried out on the off-line production paper, that is to say on the finished paper.
  • the rewetting solution according to the invention can be applied using a rotogravure device comprising a rotogravure cylinder whose imprints or hollow cells, have a shape such that they make it possible to apply said solution of rewetting according to a pattern corresponding to said mark in said zone or zones.
  • the rewetting solution is applied using a device of the type of those used in inkjet printing processes, in particular the processes inkjet printing on a reel, it being understood that said ink is replaced by said aqueous rewetting solution.
  • Inkjet printing devices, especially digital inkjet printing devices allow brands to be created according to various patterns that can be changed quickly and inexpensively from one manufacturing to another other.
  • Said rewetting solution may advantageously comprise a wetting agent so as to improve or accelerate the penetration of the solution into the paper.
  • Said wetting agent may be advantageous, in particular according to the characteristics of the paper, in particular its porosity and the possible presence or not in it of a wetting agent and also according to the amount of re-wetting solution applied. By way of illustration, a quantity of 2 to 20 g / m 2 of rewetting solution can be applied.
  • said rewetting solution is a solution of a polar solvent hydrophilic.
  • wetting agent it is possible in particular to use ethanol or 2-pyrrolidone.
  • the rewetting solution is an aqueous solution, the use of a non-aqueous solvent inducing additional costs and risks of pollution.
  • water without a wetting agent as an aqueous rewetting solution, in particular in the case of very porous paper and / or which includes wetting agents and / or special pigments with a high capacity absorption of water in its composition, like certain silicas.
  • the rewetting solution may also contain additives such as as dyes, in particular shading dyes, fluorescent agents whiteners (optical brighteners) or, conversely, fluorescence inhibitors as well that all additives known to those skilled in the art to allow recognition or authentication of so-called security papers.
  • the rewetting solution can contain a colorless anti-forgery agent or authentication agent capable of being revealed by reaction with a specific co-reactant or under specific conditions.
  • a Hewlett Packard Deskjet 560 C desktop printer is used equipped with a cartridge reference 51626A previously emptied of its ink, cleaned then filled with a rewetting solution consisting distilled water and 2% volume of ethanol, in order to rewet the papers below.
  • the marks are positive, unless otherwise specified, and the quantity of rewetting solution provided, for a rewetted solid color with a resolution of 600 ⁇ 300 dots per inch, and the so-called “coarse” screening conditions, so-called “mail” and so-called “normal” intensity control quality is around 12 g / m2.
  • the papers, immediately rewetted, are passed through a laboratory calender with two rollers heated to 50 ° C, under a linear pressure of 3.0 kN / cm.
  • EXAMPLE 3 OPACITY CONTRAST AND COLOR GAP (SHADE AND BRIGHTNESS)
  • the motif is reproduced in two different places, according to a photograph of an identity of a person, according to the general conditions mentioned above, however for one of the reproductions (a), the dark parts of the photograph were made by rewetting, and for the other reproduction (b), the light parts of the photograph were rewetted, thus appearing in negative.
  • the paper thus obtained is a security paper personalized by the double pseudo-watermark of the identity photograph that we recognize By direct vision, in reflected light, in the form of shade contrast, we observe (a).
  • An uncoated 170 g / m 2 bijet paper is produced on a laboratory form.
  • One of the jets is white and has a grammage of 90 g / m 2 and the other jet is of green shade and also has a grammage of 80 g / m 2
  • An uncoated laminated paper of 210 g / m 2 is produced by laminating two uncoated white papers having a grammage of 90 g / m 2 using an adhesive based on poly (vinyl acetate) and comprising 3% by weight of a shading dye, VIOLET BB 200%.
  • the pseudofiligrane is produced as in Example 7.
  • a paper is obtained having marks according to the pattern similar to a translucent watermark but it has better visibility in transmitted light, because the amount of dye is less than that from example 7.
  • the rewetting solution consists of distilled water and 2% by weight of 2-pyrrolidone (98% purity). After calendering at 50 ° C a paper similar to that of Example 3, under a linear pressure of 1.0 kN / cm, a paper is obtained with a pseudo-watermark in accordance with the invention, by shade contrast and opacity.
  • a SCITEX 6240 inkjet printer printhead was installed one meter from the calender rollers. Printing and calendering speed are synchronized.
  • As a rewetting solution for the paper a mixture of demineralized water and 5% by volume of ethanol is used.
  • the grille consists of two rollers; one is made of steel and the counter roller has a plastic covering. These rollers are heated to 80 ° C and the linear pressure between the rollers is 2.5 kN / cm.
  • the coil is unwound from a sheet of white paper, a pattern is made with the rewetting solution using the print head on the sheet, then the said sheet is passed between the two rolls of the calender.
  • the running speed of the paper sheet is 20 m / min.
  • the dry paper sheet has a thickness of 60 ⁇ m and has been densified in the rewetting zones by a thickness reduction of 16 ⁇ m.
  • a paper is obtained with a pseudo-watermark according to the invention, by reduction of thickness.

Abstract

The invention concerns an uncoated paper comprising at least a mark resembling a watermark, characterised in that one or several specific zones of the paper has a reduced thickness with respect to the rest of the paper, the mass per unit area in said zone(s) of the paper being identical to that of the rest of the paper. The invention also concerns a method for making uncoated paper comprising at least a mark resembling a watermark characterised in that it consists of producing said mark after the paper-drying step, by the following steps which consist in: a) applying a wetting solution on at least one face of the uncoated paper; then b) applying pressure and heat in said zone(s) so as to evaporate said solution and densify the non-coated paper in said zone(s) with respect to the rest of the paper.

Description

La présente invention concerne un papier non couché comprenant au moins un pseudo-filigrane consistant en une marque conférant au dit papier un effet visuel et une texture ressemblant à ceux d'un filigrane.The present invention relates to an uncoated paper comprising at least one pseudo-watermark consisting of a mark giving the said paper a visual effect and a texture resembling that of a watermark.

La présente invention concerne également un procédé de fabrication d'un papier non couché selon l'invention.The present invention also relates to a method for manufacturing a non-paper coated according to the invention.

Les papiers filigranés sont en général utilisés dans le domaine des papiers de sécurité tels que les moyens de paiement comme les billets de banque ou les chèques, les lettres-chèques et les documents officiels comme les passeports, cartes d'identité, papiers timbrés, actes notariés, ou encore les billets d'entrée à des manifestations culturelles ou sportives car la présence du filigrane limite les possibilités de reproduction par photocopie et de contrefaçon, et offre un moyen de reconnaissance et/ou d'authentification dudit papier. Les papiers filigranés sont aussi utilisés dans le domaine des papiers d'entreprise personnalisés en reprenant sous forme de filigrane le logo, le nom ou une marque de l'entreprise. Il peut s'avérer que ces papiers filigranés soient demandés dans de très faibles tonnages et/ou dans de courts délais de fabrication.Watermarked papers are generally used in the field of security papers such as means of payment such as banknotes or checks, check letters and official documents like passports, identity cards, stamped papers, notarial acts, or entry tickets to cultural or sporting events because the presence of the watermark limits the possibilities of photocopying and counterfeiting, and offers a means of recognizing and / or authenticating said paper. The papers watermarks are also used in the field of personalized company papers in using the company's logo, name or brand as a watermark. he can it turns out that these watermarked papers are requested in very small tonnages and / or in short manufacturing times.

Il est connu de réaliser des papiers filigranés de différentes manières selon que l'on réalise des filigranes véritables ou des « pseudo filigranes ».It is known to produce watermarked papers in different ways depending on whether one real watermarks or "pseudo watermarks".

Jusqu'à présent, différents procédés ont été proposés en vue de réaliser des papiers filigranés qui peuvent être classés en deux catégories.

  • 1 - Les filigranes « véritables» sont obtenus lors de la fabrication de la feuille de papier, dans la partie humide de la machine à papier, par des formes rondes comportant des empreintes ou embossages en creux et/ou en relief ou à l'aide de rouleaux filigraneurs comportant des embossages en creux et/ou en relief associés à une table plate (machine Fourdrinier). On obtient alors un motif qui comporte des zones claires, lorsqu'on regarde la feuille de papier par observation en lumière transmise, si les empreintes sont réalisées en relief, ou des zones sombres ou ombrées, si les empreintes sont réalisées en creux. Les zones claires sont dues au fait que l'épaisseur de la feuille et la quantité de fibres (masse surfacique) sont plus faibles dans les zones correspondant aux empreintes que dans le reste de la feuille de papier. Inversement, les zones foncées sont dues au fait que l'épaisseur de la feuille et la quantité de fibres sont plus importantes dans les zones correspondant aux empreintes. Ces procédés de filigranage en partie humide impliquent des moyens de réalisation onéreux spécifiques pour chaque type de filigrane tels que les rouleaux filigraneurs qui sont réalisés par gravure du motif du filigrane et n'offrent donc pas la souplesse nécessaire d'un point de vue économique et aussi souhaitée par les demandeurs d'un filigrane personnalisé pour fabriquer des papiers filigranés en petites quantités.
  • 2 - Il est connu de réaliser des « pseudo-filigranes » par pénétration ou impression dans des zones déterminées du papier d'une composition qui agit soit en transparentisant le matelas fibreux de la feuille de papier de façon permanente, soit en vernissant la surface. Ces procédés altèrent de manière significative les propriétés de surface du papier ainsi traité, notamment l' imprimabilité. Le document WALENSKI, W.: "Watermarks and Those That Are Not", Druckspiegel 52, no 3: 66-68 (March 1997), décrit un procédé pour réaliser un pseudofiligrane sur un papier non-couché, comprenant l'application sous chaleur et pression d'une pièce de marquage, représentant le motif du pseudofiligrane, sur une feuille de papier remouillée.
    • Until now, various methods have been proposed in order to produce watermarked papers which can be classified into two categories.
  • 1 - The "real" watermarks are obtained during the manufacture of the sheet of paper, in the wet part of the paper machine, by round shapes comprising imprints or embossings in hollow and / or in relief or using watermark rollers with embossed and / or raised embossing associated with a flat table (Fourdrinier machine). A pattern is then obtained which includes light areas, when looking at the sheet of paper by observation in transmitted light, if the prints are made in relief, or dark or shaded areas, if the prints are made in hollow. The light areas are due to the fact that the sheet thickness and the quantity of fibers (areal mass) are lower in the areas corresponding to the imprints than in the rest of the paper sheet. Conversely, the dark areas are due to the fact that the thickness of the sheet and the quantity of fibers are greater in the areas corresponding to the imprints. These partially wet watermarking methods imply costly means of implementation specific for each type of watermark such as the watermark rollers which are produced by etching the watermark motif and therefore do not offer the necessary flexibility from an economic point of view and also desired by applicants for a custom watermark for making watermarked papers in small quantities.
  • 2 - It is known to produce "pseudo-watermarks" by penetration or printing in specific areas of the paper with a composition which acts either by permanently transparentizing the fibrous mat of the sheet of paper, or by varnishing the surface. These methods significantly alter the surface properties of the paper thus treated, in particular the printability. The document WALENSKI, W .: "Watermarks and Those That Are Not", Druckspiegel 52, no 3: 66-68 (March 1997), describes a process for producing a pseudofiligrane on an uncoated paper, including application under heat and pressing a marking piece, representing the pattern of the pseudofiligrane, on a sheet of rewetted paper.

    • On a décrit dans W097/17493 des papiers couchés avec des pseudo-filigranes résultant d'une variation du poids de couche appliqué dans des zones déterminées ce qui induit une variation d'épaisseur et d'opacité dans les dites zones où le poids de couche est réduit ou augmenté.W097 / 17493 describes papers coated with pseudo-watermarks resulting from a variation in the layer weight applied in specific areas which induces a variation in thickness and opacity in the said zones where the layer weight is reduced or increased.

    Un but de la présente invention est de fournir un papier non couché comportant des pseudo-filigranes consistant en des marques qui modifient de façon localisée les caractéristiques physiques du papier telles que son volume massique et partant certaines propriétés telles que son épaisseur et éventuellement son opacité.An object of the present invention is to provide uncoated paper having pseudo-watermarks consisting of marks which locally modify the physical characteristics of the paper such as its mass volume and therefore certain properties such as its thickness and possibly its opacity.

    Un autre but de la présente invention est de fournir un papier non couché présentant des pseudo-filigranes consistant en des marques qui créent un contraste de nuance avec le reste de la feuille de papier.Another object of the present invention is to provide an uncoated paper having pseudo-watermarks consisting of marks which create a shade contrast with the rest of the sheet of paper.

    Un autre but de la présente invention est de fournir un papier non couché comportant des pseudo-filigranes réalisés sans recours à l'application d'un vernis à sa surface de sorte que la composition du papier dans les zones constituant le pseudo-filigrane ne soit pas significativement modifiée.Another object of the present invention is to provide an uncoated paper comprising pseudo-watermarks produced without using a varnish on its surface so that the composition of the paper in the areas constituting the pseudo-watermark is not significantly changed.

    Un autre but de la présente invention est de fournir un papier non couché avec des pseudo-filigranes dont les propriétés d'usage, en particulier les propriétés d'imprimabilité dans les zones de la surface du papier correspondant aux dites marques, ne soient pas significativement altérées par rapport aux autres zones non marquées par un dit pseudo filigrane du papier.Another object of the present invention is to provide uncoated paper with pseudo-watermarks whose usage properties, in particular printability properties in the areas of the paper surface corresponding to the said marks, are not significantly altered compared to other areas not marked by a so-called pseudo paper watermark.

    Un autre but de la présente invention est de fournir un papier non couché présentant des pseudo-filigranes qui puisse être fabriqué en quantités variables et faibles dans des conditions plus économiques que par les procédés de la technique antérieure et qui puisse être obtenu en laizes et quantités indépendantes des caractéristiques de la machine à papier, en particulier par un procédé dont la mise en oeuvre des machines ne modifie pas l'opération de fabrication du papier proprement dite.Another object of the present invention is to provide an uncoated paper having pseudo-watermarks that can be manufactured in variable and small quantities in more economical conditions than by the processes of the prior art and which can be obtained in widths and quantities independent of the characteristics of the paper machine, in particular by a process whose implementation of the machines does not modify the operation of actual paper manufacturing.

    Un autre but de la présente invention est de fournir un papier non couché présentant un pseudo-filigrane dans lequel ledit filigrane est réalisé après la dernière opération de fabrication, c'est à dire en sortie de la sècherie, éventuellement sur le papier fini, c'est à dire hors ligne de fabrication.Another object of the present invention is to provide an uncoated paper having a pseudo-watermark in which said watermark is produced after the last operation of manufacturing, that is to say at the end of the drying season, possibly on the finished paper, that is to say off-line manufacturing.

    Pour ce faire, la présente invention fournit un papier non couché comportant au moins une marque ressemblant à un filigrane caractérisé en ce que une ou des zone(s) déterminée(s) du papier présentent une réduction d'épaisseur par rapport au reste du papier non couché, la masse surfacique dans la ou lesdites zones du papier étant identique à celle du reste du papier, selon la revendication 11. En particulier, les grammages sont identiques dans la ou lesdites zones et dans le reste du papier, étant entendu que la variation de poids pouvant résulter de la présence d'un additif non évaporé de la solution de remouillage n'est pas significative.To do this, the present invention provides an uncoated paper comprising at least a mark resembling a watermark characterized in that one or more determined area (s) of paper have a reduction in thickness compared to the rest of uncoated paper, the areal mass in said area or areas of the paper being identical to that of the rest of the paper, according to claim 11. In particular, the grammages are identical in the said zone or zones and in the rest of the paper, it being understood that the variation in weight which may result from the presence of an additive not evaporated from the rewetting solution is not significant.

    Dans un mode de réalisation, la ou lesdites zones présentent une réduction d'opacité par rapport au reste du papier.In one embodiment, the one or more zones have a reduction in opacity compared to the rest of the paper.

    Selon une variante de réalisation, la ou lesdites zones présentent une couleur notamment une nuance et/ou une luminosité, différente de celle du reste du papier.According to an alternative embodiment, the said zone or zones have a color in particular a shade and / or a brightness, different from that of the rest of the paper.

    Dans les papiers selon l'objet de la présente invention, le papier peut présenter une réduction d'épaisseur et d'opacité dans la ou lesdites zones par rapport au reste du papier.In the papers according to the object of the present invention, the paper may have a reduction in thickness and opacity in the said zone or zones relative to the rest of the paper.

    Selon la présente invention, le papier peut présenter, dans la ou lesdites zones, des agents choisis parmi des agents colorants, des agents fluorescents, des agents inhibiteurs de fluorescence, des agents permettant la reconnaissance ou l'authentification. Ces agents peuvent avoir été déposés par incorporation de la solution de remouillage, décrite plus loin, les contenant et être restés après évaporation de la solution. Des agents antifalsification ou d'authentification sont bien connus de l'homme de l'art dans le domaine des papiers fiduciaires et de sécurité.According to the present invention, the paper may have, in the said zone or zones, agents chosen from coloring agents, fluorescent agents, agents inhibiting fluorescence, agents allowing recognition or authentication. These agents may have been deposited by incorporating the rewetting solution, described below, containing them and remaining after evaporation of the solution. Anti-forgery agents or are well known to those skilled in the art in the field of papers fiduciary and security.

    Selon l'invention, le papier peut comporter deux ou plusieurs jets fibreux. Selon une variante, seul l'un des jets de surface présente une réduction d'épaisseur et/ou une différence de nuance et/ou de luminosité dans la ou lesdites zones par rapport au reste du papier multijet.According to the invention, the paper can comprise two or more fibrous jets. According to one variant, only one of the surface jets has a reduction in thickness and / or a difference of shade and / or luminosity in the said zone or zones relative to the rest of the multijet paper.

    Selon l'invention, le papier peut comporter deux ou plusieurs feuilles de papier contrecollées. Selon une variante, la colle de contrecollage est colorée. Dans un mode de réalisation seule une feuille du papier contrecollé présente une réduction d'épaisseur et/ou une différence de nuance et/ou une différence de luminosité dans la ou lesdites zones par rapport au reste du papier contrecollé.According to the invention, the paper can comprise two or more sheets of paper laminated. According to a variant, the lamination adhesive is colored. In a mode of only a sheet of laminated paper has a reduction in thickness and / or a difference in shade and / or difference in brightness in the said zone or zones with respect to to the rest of the laminated paper.

    La présente invention fournit aussi un procédé de fabrication d'un papier non couché présentant au moins une marque ressemblant à un filigrane tel que décrit précédemment, caractérisé en ce qu'on réalise ladite marque après l'étape de séchage du papier, ou notamment hors ligne de fabrication du papier, en effectuant les étapes dans lesquelles :

  • a) on applique une solution de remouillage sur au moins une face du papier non couché, dans une ou des zone(s) déterminée(s) puis,
  • b) on applique une pression et une chaleur dans la ou lesdites zones du papier non couché remouillé de manière à évaporer ladite solution et densifier le papier non couché dans la ou lesdites zones par rapport au reste du papier, en appliquant lesdites pressions et chaleurs sur toute la surface de la feuille.
    • The present invention also provides a method of manufacturing an uncoated paper having at least one mark resembling a watermark as described above, characterized in that said mark is produced after the step of drying the paper, or in particular outside paper manufacturing line, performing the steps in which:
  • a) applying a rewetting solution to at least one face of the uncoated paper, in one or more determined area (s), then,
  • b) a pressure and a heat are applied in the said zone (s) of rewetted uncoated paper so as to evaporate said solution and densify the uncoated paper in said zone (s) relative to the rest of the paper, by applying said pressure and heat on the entire surface of the leaf.

    • Selon la présente invention par « papier non couché » on entend que le papier n'est pas revêtu d'une couche pigmentée comprenant au moins des pigments fins minéraux notamment du kaolin et/ou du carbonate de calcium, et au moins un liant ou adhésif, notamment de l'amidon ou du latex, ainsi que, éventuellement, tous additifs couramment employés par l'homme de l'art dont la fonction est d'améliorer les propriétés rhéologiques de la sauce et de conférer des propriétés particulières à la couche.
    En revanche, le papier peut être imprégné ou traité en surface avec une composition non pigmentée telle qu'une composition d'encollage, notamment pour améliorer son imprimabilité, et/ou sa résistance mécanique et/ou sa résistance à la salissure et/ou ses propriétés bactéricide.
    Selon la présente invention par « papier remouillé » on entend que, dans la ou lesdites zones, la solution de remouillage a pénétré à l'intérieur du papier et n'est pas encore évaporée.
    Selon la présente invention, en exerçant une pression sur toute la feuille de papier non couché ou seulement sur lesdites zones et en augmentant la température du papier, ladite solution de remouillage est évaporée et le papier est densifié dans les zones où ladite solution a été initialement appliquée. Il en résulte une augmentation de la masse volumique du papier dans lesdites zones par rapport au reste de la feuille-de papier et plus précisément une réduction d'épaisseur avec une masse surfacique identique à celle du reste du papier. Lesdites zones peuvent présenter alors un contraste d'opacité (réduction d'opacité) et/ou un contraste de couleur notamment de nuance de couleur et de luminosité avec le reste de la feuille de papier.    According to the present invention, “uncoated paper” means that the paper is not coated with a pigmented layer comprising at least fine mineral pigments, in particular kaolin and / or calcium carbonate, and at least one binder or adhesive. , in particular starch or latex, as well as, optionally, any additives commonly used by those skilled in the art, the function of which is to improve the rheological properties of the sauce and to confer particular properties on the layer.
    On the other hand, the paper can be impregnated or surface treated with a non-pigmented composition such as a sizing composition, in particular to improve its printability, and / or its mechanical resistance and / or its resistance to soiling and / or its bactericidal properties.
    According to the present invention, by “rewetted paper” is meant that, in the said zone or zones, the rewetting solution has penetrated inside the paper and has not yet evaporated.
    According to the present invention, by exerting pressure on the whole sheet of uncoated paper or only on said areas and by increasing the temperature of the paper, said rewetting solution is evaporated and the paper is densified in the areas where said solution was initially applied. This results in an increase in the density of the paper in said areas relative to the rest of the sheet of paper and more precisely a reduction in thickness with a surface mass identical to that of the rest of the paper. Said zones can then present an opacity contrast (reduction of opacity) and / or a color contrast, in particular of color nuance and brightness with the rest of the sheet of paper.

    L'opacité du papier est en partie liée à la présence d'air dans les interstices fibreux et/ou pigmentaires du papier. Lors de l'étape de remouillage, la solution remplace l'air dans lesdits interstices. Puis lors de l'étape (b), la solution est évaporée et les fibres et/ou les pigments étant densifiés, les interstices d'air occupent globalement un volume réduit et notamment se retrouvent en quantité plus faible qu'initialement, ce qui engendre une désopacification.The opacity of the paper is partly linked to the presence of air in the fibrous interstices and / or paper pigments. During the rewetting step, the solution replaces the air in said interstices. Then during step (b), the solution is evaporated and the fibers and / or the pigments being densified, the air gaps generally occupy a reduced volume and in particular are found in smaller quantities than initially, which generates a désopacification.

    Il convient de relever que, de façon originale, dans le procédé selon l'invention, la densification du papier provient d'une réduction d'épaisseur des zones traitées par rapport au reste du papier, la masse surfacique restant constante par rapport au reste du papier. Au contraire, dans un filigrane « véritable » la masse surfacique est moindre dans les zones claires car les fibres déposées sont en quantité plus faible par rapport au reste de la feuille.It should be noted that, in an original way, in the process according to the invention, the densification of the paper comes from a reduction in thickness of the treated areas compared to the rest of the paper, the surface mass remaining constant relative to the rest of the paper. At on the contrary, in a "real" watermark the surface mass is less in the areas clear because the fibers deposited are in smaller quantity compared to the rest of the sheet.

    Dans le pseudo-filigrane décrit dans W0 97/17493, la masse surfacique n'est pas constante car le poids de la couche est réduit dans certaines zones.In the pseudo-watermark described in WO 97/17493, the surface mass is not constant because the weight of the layer is reduced in certain areas.

    Le remouillage du papier facilite le réarrangement des fibres et/ou des pigments lors du calandrage. Il peut y avoir des additifs dans la solution de remouillage qui facilitent le réarrangement des fibres et/ou des pigments et/ou qui favorisent la plus ou moins grande pénétration de ladite solution dans le papier.Rewetting the paper facilitates rearrangement of the fibers and / or pigments during calendering. There may be additives in the rewetting solution which facilitate the rearrangement of fibers and / or pigments and / or which favor the greater or lesser penetration of said solution into the paper.

    Le procédé de la présente invention peut également créer une modification de la couleur du papier dans la ou lesdites zones lorsque ladite solution de remouillage comprend un agent colorant notamment un agent colorant de nuançage. Cependant dans le cas d'un papier multijet, notamment bijet, le contraste de couleur dans la ou lesdites zones peut également résulter de la modification de l'opacité dans l'un des jets de surface lorsqu'il existe un écart de nuance initialement entre cedit jet de surface et le jet qui lui est lié.The method of the present invention can also create a modification of the color of the paper in said zone or zones when said rewetting solution comprises a coloring agent, in particular a tinting coloring agent. However in the case of a multijet paper, in particular bijet, the color contrast in the said zone or zones may also result from the modification of the opacity in one of the surface jets when it exists a difference in shade initially between said surface jet and the jet linked to it.

    Le procédé selon la présente invention s'applique à tous papiers non couchés, blancs ou colorés, sans limitation de grammage, éventuellement contrecollés ou multijets.The method according to the present invention applies to all uncoated, white papers or colored, without limitation of grammage, possibly laminated or multijet.

    Dans un mode de réalisation préféré à l'étape (b), on applique ladite pression et ladite chaleur en effectuant un calandrage du papier.In a preferred embodiment in step (b), said pressure and said heat by calendering the paper.

    Les rouleaux de la calandre peuvent être chauffés mais en tout état de cause le frottement produit par la calandre génère de la chaleur.The calender rollers can be heated but in any event the friction produced by the grille generates heat.

    L'opération de calandrage est réalisée selon la présente invention avec des calandres connues de l'homme de l'art.The calendering operation is carried out according to the present invention with calenders known to those skilled in the art.

    De manière générale, les calandres peuvent être du type supercalandre, calandre molle (appelée aussi élastique) ou lisse. Elles sont constituées de plusieurs rouleaux dont le nombre et la nature du matériau les constituant varient selon le but recherché et le papier à traiter. Le but est d'aplanir les surfaces des papiers, par compression plus ou moins forte de la feuille entre les rouleaux et par l'étendue plus ou moins grande de la zone de contact entre les rouleaux et la feuille, afin de leur conférer un certain « lissé » ainsi qu'une certaine douceur au toucher et une bonne aptitude à l'écriture et à l'impression. Les crêtes et reliefs sont aplanis plus ou moins fortement au moment du passage entre les rouleaux et la feuille est densifiée. Le but du calandrage peut être également de rendre les surfaces brillantes ou satinées.
    Les rouleaux des calandres sont en fonte trempée ou en acier dont certains peuvent être recouverts d'un tissu, d'un carton ou d'une matière plastique par exemple pour faire des rouleaux élastiques. La supercalandre, qui comporte un grand nombre de rouleaux (de l'ordre de 12 ou plus) est souvent située hors machine à cause de l'entretien, du changement des rouleaux et des ruptures de feuille. La calandre molle peut être située sur la machine à papier, le nombre de rouleaux est plus faible et certains sont élastiques. La lisse est située sur machine et comporte quelques rouleaux souvent en acier et ne sont pas recouverts.
    La pression linéaire exercée entre les rouleaux sur le papier est de l'ordre de 0,5 à 5000 kN/cm. La température des rouleaux lorsqu'ils sont chauffés peut être de 50 à 300°C.    In general, the calenders can be of the supercalender, soft calender (also called elastic) or smooth type. They consist of several rollers, the number and nature of the material constituting them vary depending on the purpose and the paper to be treated. The goal is to flatten the paper surfaces, by more or less strong compression of the sheet between the rollers and by the more or less large extent of the contact area between the rollers and the sheet, in order to give them a certain "Smoothed" as well as a certain softness to the touch and a good aptitude for writing and printing. The ridges and reliefs are flattened more or less strongly at the time of the passage between the rollers and the sheet is densified. The purpose of calendering can also be to make the surfaces shiny or satin.
    The calender rolls are made of hardened cast iron or steel, some of which can be covered with a fabric, cardboard or plastic for example to make elastic rollers. The supercalender, which has a large number of rollers (of the order of 12 or more) is often located outside the machine because of maintenance, changing of the rollers and sheet breaks. The soft grille can be located on the paper machine, the number of rollers is lower and some are elastic. The boom is located on a machine and has a few rollers often made of steel and is not covered.
    The linear pressure exerted between the rollers on the paper is of the order of 0.5 to 5000 kN / cm. The temperature of the rollers when heated can be 50 to 300 ° C.

    Selon la présente invention, pour un équipement donné, les différents paramètres du calandrage tels que la température, la dureté des rouleaux, le revêtement éventuellement des rouleaux, l'étendue de la zone de contact entre les rouleaux et la feuille ainsi que la pression sont choisis en fonction de la nature du contraste final désiré. Ces différents paramètres sont adaptés en fonction de la vitesse de calandrage, elle-même commandée par la vitesse d'application de la solution de remouillage. De préférence, on utilise une calandre comportant 2 à 6 rouleaux et le cas échéant avec un revêtement en plastique (pour son imperméabilité à la solution de remouillage).According to the present invention, for a given piece of equipment, the different parameters of the calendering such as temperature, hardness of the rollers, possibly coating of rollers, the extent of the contact area between the rollers and the sheet as well as the pressure are chosen according to the nature of the desired final contrast. These different parameters are adapted according to the calendering speed, which is controlled by the speed application of the rewetting solution. Preferably, a calender is used comprising 2 to 6 rolls and if necessary with a plastic coating (for its impermeability to rewetting solution).

    Selon la présente invention, la marque peut correspondre à la ou lesdites zones et constituer un motif donné apparaissant par contraste en positif par rapport au reste de la feuille de papier non remouillé. Inversement, le motif donné peut apparaítre par contraste en négatif dans la mesure où la marque correspondrait audit reste de la feuille de papier non traité, c'est à dire non remouillé initialement. En particulier, la ou lesdites zones peuvent définir un- motif visuel en observation en lumière transmise résultant d'une réduction d'opacité dans la ou lesdites zones. La ou lesdites zones peuvent aussi définir un motif visuel par observation en lumière réfléchie résultant d'une différence de couleur de la ou lesdites zones.According to the present invention, the mark can correspond to the said zone or zones and constitute a given pattern appearing in positive contrast with respect to the rest of the sheet of paper not rewetted. Conversely, the given pattern can appear by contrast in negative since the mark would correspond to the remainder of the sheet of paper not treated, i.e. not rewetted initially. In particular, the said zone or zones may define a visual pattern in observation in transmitted light resulting from a reduction opacity in the said zone or zones. The said zone or zones can also define a visual pattern by observation in reflected light resulting from a difference in color of said one or more areas.

    De préférence, ladite marque correspond à la ou lesdites zones traitées; Preferably, said mark corresponds to the said area or areas treated;

    De préférence, pour satisfaire aux objectifs de volume des marchés sur mesure, l'étape (a) est réalisée sur le papier hors ligne de fabrication, c'est à dire sur le papier fini.Preferably, to meet the volume targets of custom markets, step (a) is carried out on the off-line production paper, that is to say on the finished paper.

    A l'étape a), la solution de remouillage selon l'invention peut être appliquée à l'aide d'un dispositif héliographique comportant un cylindre d'héliogravure dont les empreintes ou alvéoles en creux, ont une forme telle qu'elles permettent d'appliquer ladite solution de remouillage selon un motif correspondant à ladite marque dans la ou lesdites zones.In step a), the rewetting solution according to the invention can be applied using a rotogravure device comprising a rotogravure cylinder whose imprints or hollow cells, have a shape such that they make it possible to apply said solution of rewetting according to a pattern corresponding to said mark in said zone or zones.

    De préférence, la solution de remouillage est appliquée à l'aide d'un dispositif du type de ceux utilisés dans les procédés d'impression par jet d'encre notamment les procédés d'impression par jet d'encre sur bobine étant entendu que l'on remplace ladite encre par ladite solution aqueuse de remouillage. Les dispositifs d'impression par jet d'encre notamment les dispositifs d'impression numérique par jet d'encre permettent de créer des marques selon des motifs variés qui peuvent être modifiés rapidement et à moindre coût d'une fabrication à une autre.Preferably, the rewetting solution is applied using a device of the type of those used in inkjet printing processes, in particular the processes inkjet printing on a reel, it being understood that said ink is replaced by said aqueous rewetting solution. Inkjet printing devices, especially digital inkjet printing devices allow brands to be created according to various patterns that can be changed quickly and inexpensively from one manufacturing to another other.

    Ladite solution de remouillage peut comporter avantageusement un agent mouillant de manière à améliorer ou à accélérer la pénétration de la solution dans le papier. Ledit agent mouillant peut être avantageux, en particulier selon les caractéristiques du papier notamment sa porosité et la présence éventuelle ou non dans celui-ci d'un agent mouillant et selon aussi la quantité de la solution de remouillage appliquée. A titre illustratif, on peut appliquer une quantité de 2 à 20 g/m2 de solution de remouillage.Said rewetting solution may advantageously comprise a wetting agent so as to improve or accelerate the penetration of the solution into the paper. Said wetting agent may be advantageous, in particular according to the characteristics of the paper, in particular its porosity and the possible presence or not in it of a wetting agent and also according to the amount of re-wetting solution applied. By way of illustration, a quantity of 2 to 20 g / m 2 of rewetting solution can be applied.

    Avantageusement, ladite solution de remouillage est une solution d'un solvant polaire hydrophile.Advantageously, said rewetting solution is a solution of a polar solvent hydrophilic.

    Comme agent mouillant, on peut utiliser notamment l'éthanol ou la 2-pyrrolidone.As wetting agent, it is possible in particular to use ethanol or 2-pyrrolidone.

    De préférence, la solution de remouillage est une solution aqueuse, l'usage d'un solvant non aqueux induisant des surcoûts et des risques de pollution.Preferably, the rewetting solution is an aqueous solution, the use of a non-aqueous solvent inducing additional costs and risks of pollution.

    Selon un mode de réalisation particulier, on peut utiliser comme solution de remouillage une solution hydroalcoolique.According to a particular embodiment, one can use as solution of rewetting a hydroalcoholic solution.

    Plus particulièrement, on peut utiliser une solution aqueuse contenant de 1 à 10% en volume d'éthanol notamment 2%, dans de l'eau, ou une solution aqueuse contenant de 1 à-10 % en poids de 2-pyrrolidone, notamment 2 % dans de l'eau.More particularly, an aqueous solution containing from 1 to 10% in volume of ethanol, in particular 2%, in water, or an aqueous solution containing from 1 to 10 % by weight of 2-pyrrolidone, in particular 2% in water.

    Dans certains cas, il peut s'avérer possible d'utiliser de l'eau sans agent mouillant comme solution aqueuse de remouillage notamment dans le cas d'un papier très poreux et/ou qui comporte des agents mouillant et/ou des pigments particuliers ayant une grande capacité d'absorption de l'eau dans sa composition, comme certaines silices. In some cases it may be possible to use water without a wetting agent as an aqueous rewetting solution, in particular in the case of very porous paper and / or which includes wetting agents and / or special pigments with a high capacity absorption of water in its composition, like certain silicas.

    Eventuellement la solution de remouillage peut également comporter des additifs tels que des colorants, notamment des colorants de nuançage, des agents fluorescents blanchissants (azurants optiques) ou à l'inverse des agents inhibiteurs de fluorescence ainsi que tous additifs connus de l'homme de l'art pour permettre la reconnaissance ou l'authentification des papiers dits de sécurité. En particulier, la solution de remouillage peut comporter un agent antifalsification ou agent d'authentification incolore susceptible d'être révélé par réaction avec un coréactif déterminé ou dans des conditions particulières.Optionally, the rewetting solution may also contain additives such as as dyes, in particular shading dyes, fluorescent agents whiteners (optical brighteners) or, conversely, fluorescence inhibitors as well that all additives known to those skilled in the art to allow recognition or authentication of so-called security papers. In particular, the rewetting solution can contain a colorless anti-forgery agent or authentication agent capable of being revealed by reaction with a specific co-reactant or under specific conditions.

    D'autres caractéristiques et avantages de la présente invention apparaítront à la lumière des exemples de réalisation qui suivent.Other characteristics and advantages of the present invention will become apparent on in light of the following exemplary embodiments.

    CONDITIONS GENERALES DE REALISATION DU PSEUDO-FILIGRANE DES EXEMPLES 1 à 11 :GENERAL CONDITIONS FOR PRODUCING THE PSEUDO-FILIGRANE OF EXAMPLES 1 to 11:

    En simulation des systèmes d'impression numérique par jet d'encre sur bobine, on utilise une imprimante de bureau Hewlett Packard Deskjet 560 C munie d'une cartouche référence 51626A préalablement vidée de son encre, nettoyée puis remplie d'une solution de remouillage constituée d'eau distillée et de 2% volume d'éthanol, afin de remouiller les papiers ci-après. Dans ces exemples, les marques sont en positif, sauf précision particulière, et la quantité de solution de remouillage apportée, pour un aplat remouillé avec une résolution de 600 x 300 points par pouce, et les conditions de tramage dit « gros grain », de qualité dite « courrier » et de contrôle d'intensité dit « normal », est de l'ordre de 12 g/m2.
    Les papiers aussitôt remouillés sont passés dans une calandre de laboratoire à deux rouleaux chauffés à 50°C, sous une pression linéaire de 3,0 kN/cm.    In simulation of digital inkjet printing systems on a reel, a Hewlett Packard Deskjet 560 C desktop printer is used equipped with a cartridge reference 51626A previously emptied of its ink, cleaned then filled with a rewetting solution consisting distilled water and 2% volume of ethanol, in order to rewet the papers below. In these examples, the marks are positive, unless otherwise specified, and the quantity of rewetting solution provided, for a rewetted solid color with a resolution of 600 × 300 dots per inch, and the so-called “coarse” screening conditions, so-called “mail” and so-called “normal” intensity control quality is around 12 g / m2.
    The papers, immediately rewetted, are passed through a laboratory calender with two rollers heated to 50 ° C, under a linear pressure of 3.0 kN / cm.

    EXEMPLE 1 : CONTRASTE D'OPACITE EXAMPLE 1 : OPACITY CONTRAST

    Sur une feuille de papier blanc non couché de 80 g/m2 de format A4, commercialisé sous la marque RG® de la société GUERIMAND S.A., on représente par remouillage et calandrage selon les conditions données ci-dessus, un motif qui est un personnage tenant à la main un parapluie fermé, à l'aide du logiciel POWER POINT ® de MICROSOFT. On obtient un papier présentant des marques selon le motif semblable à un filigrane ombré translucide. La réduction d'épaisseur variable dans la zone traitée peut aller jusqu'à 40% par rapport au reste du papier. On a sheet of uncoated white paper of 80 g / m 2 in A4 format, marketed under the brand RG® of the company GUERIMAND SA, a pattern which is a character is represented by rewetting and calendering according to the conditions given above. holding a closed umbrella in your hand, using MICROSOFT POWER POINT ® software. We obtain a paper with marks according to the pattern similar to a translucent shaded watermark. The variable thickness reduction in the treated area can be up to 40% compared to the rest of the paper.

    EXEMPLE 2 : CONTRASTE D'OPACITE EXAMPLE 2 : OPACITY CONTRAST

    Sur une feuille de papier blanc non couché de 80 g/m2 de format A4, commercialisé sous la marque RG® de la société GUERIMAND S.A., on représente par remouillage et calandrage selon les conditions données ci-dessus, un motif marbré, à l'aide du logiciel POWER POINT ® de MICROSOFT. On obtient un papier présentant des marques selon le motif semblable à un filigrane ombré translucide. La réduction d'épaisseur variable dans la zone traitée peut aller jusqu'à 40% par rapport au reste du papier.On a sheet of uncoated white paper of 80 g / m 2 in A4 format, marketed under the brand RG® of the company GUERIMAND SA, a marbled pattern is represented by rewetting and calendering according to the conditions given above. using MICROSOFT POWER POINT ® software. We obtain a paper with marks according to the pattern similar to a translucent shaded watermark. The variable thickness reduction in the treated area can be up to 40% compared to the rest of the paper.

    EXEMPLE 3 : CONTRASTE D'OPACITE ET ECART DE COULEUR (NUANCE ET LUMINOSITE) EXAMPLE 3: OPACITY CONTRAST AND COLOR GAP (SHADE AND BRIGHTNESS)

    Sur une feuille de papier de couleur jaune non couché de 80 g/m2 de format A4, commercialisé sous la marque POPSET ® de la société ARJO WIGGINS S.A., on représente par remouillage et calandrage selon les conditions données ci-dessus, le motif du personnage tenant à la main un parapluie fermé, à l'aide du logiciel POWER POINT ® de MICROSOFT. On obtient un papier présentant des marques selon le motif semblable à un filigrane ombré translucide. L'écart de couleur ΔE* (selon les coordonnées colorimétriques du système CIELAB 1976) est de 5,97. La réduction d'épaisseur variable dans la zone traitée peut aller jusqu'à 40% par rapport au reste du papier.On a sheet of uncoated yellow paper of 80 g / m 2 in A4 format, marketed under the brand POPSET® of the company ARJO WIGGINS SA, the pattern of the re-wetting and calendering is represented according to the conditions given above. character holding a closed umbrella in his hand, using MICROSOFT POWER POINT ® software. We obtain a paper with marks according to the pattern similar to a translucent shaded watermark. The color difference ΔE * (according to the colorimetric coordinates of the 1976 CIELAB system) is 5.97. The variable thickness reduction in the treated area can be up to 40% compared to the rest of the paper.

    EXEMPLE 4:EXAMPLE 4:

    Sur un échantillon de papier blanc non couché de 115 g/m2 satiné, donc déjà calandré, on reproduit à deux endroits différents, le motif selon une photographie d'identité d'une personne, selon les conditions générales mentionnées ci-avant, cependant pour l'une des reproductions (a), on a réalisé par remouillage les parties sombres de la photographie, et pour l'autre reproduction (b), on a réalisé par remouillage les parties claires de la photographie, apparaissant ainsi en négatif. Après calandrage et séchage, le papier ainsi obtenu est un papier de sécurité personnalisé par le double pseudo-filigrane de la photographie d'identité que l'on reconnaít
    Par vision directe, en lumière réfléchie, sous forme de contraste de nuance, on observe (a). Par observation en lumière transmise, on observe (b) sous forme de contraste d'opacité (zones remouillées devenues moins opaques et donc plus claires), étant compris qu'à l'inverse, (a) en lumière transmise et (b) en vision directe en lumière réfléchie sont chacune perçue comme une empreinte du négatif de la photographie d'identité.    On a sample of uncoated white paper of 115 g / m 2 satin, therefore already calendered, the motif is reproduced in two different places, according to a photograph of an identity of a person, according to the general conditions mentioned above, however for one of the reproductions (a), the dark parts of the photograph were made by rewetting, and for the other reproduction (b), the light parts of the photograph were rewetted, thus appearing in negative. After calendering and drying, the paper thus obtained is a security paper personalized by the double pseudo-watermark of the identity photograph that we recognize
    By direct vision, in reflected light, in the form of shade contrast, we observe (a). By observation in transmitted light, we observe (b) in the form of opacity contrast (rewetted areas become less opaque and therefore brighter), being understood that, conversely, (a) in transmitted light and (b) in direct vision in reflected light are each perceived as an imprint of the negative of identity photography.

    EXEMPLE 5 :EXAMPLE 5:

    On réalise un papier bijet non couché de 170 g/m2sur une formette de laboratoire. L'un des jets est de couleur blanche et a un grammage de 90 g/m2 et l'autre jet est de nuance verte et a aussi un grammage de 80 g/m2 An uncoated 170 g / m 2 bijet paper is produced on a laboratory form. One of the jets is white and has a grammage of 90 g / m 2 and the other jet is of green shade and also has a grammage of 80 g / m 2

    Après séchage du papier bijet, sur la face du jet blanc, on représente par remouillage et calandrage selon les conditions générales mentionnées ci-avant, le motif du personnage tenant à la main un parapluie fermé, à l'aide du logiciel POWER POINT ® de MICROSOFT. On obtient un papier présentant des marques selon le motif apparaissant en lumière transmise semblable à un filigrane ombré translucide et nuancé. En vision directe en lumière réfléchie, on observe le motif du fait de la nuance verte du jet en dessous le motif. Le jet blanc étant assez épais, la solution de remouillage n'a pas pénétré dans le jet vert.After drying the bijet paper, on the face of the white jet, we represent by rewetting and calendering according to the general conditions mentioned above, the motif of the character holding a closed umbrella in your hand, using MICROSOFT POWER POINT ® software. We obtain a paper with marks according to the pattern appearing in transmitted light similar to a translucent, nuanced shaded watermark. In direct vision in reflected light, the pattern is observed due to the green shade of the jet below the pattern. The white jet being thick enough, the rewetting solution did not penetrate the green jet.

    EXEMPLE 6:EXAMPLE 6

    On réalise un papier contrecollé non couché de 210 g/m2 en contrecollant deux papiers non couchés de couleur blanche ayant un grammage de 90 g/m2 à l'aide d'une colle à base de poly (acétate de vinyle) et comportant 3 % en poids d'un colorant de nuançage, le VIOLET BB 200%.An uncoated laminated paper of 210 g / m 2 is produced by laminating two uncoated white papers having a grammage of 90 g / m 2 using an adhesive based on poly (vinyl acetate) and comprising 3% by weight of a shading dye, VIOLET BB 200%.

    Sur l'une des faces, on représente par remouillage et calandrage selon les conditions générales données ci-avant, le motif du personnage tenant à la main un parapluie fermé, à l'aide du logiciel POWER POINT ® de MICROSOFT. On obtient un papier présentant des marques selon le motif apparaissant en lumière transmise semblable à un filigrane ombré translucide et nuancé. En vision directe en lumière réfléchie, on observe le motif du fait de la nuance de la colle de contrecollage. La solution de remouillage n'a pas pénétré dans tout le papier du fait de la présence de la colle.On one of the faces, we represent by rewetting and calendering according to the conditions general given above, the motif of the character holding in his hand a closed umbrella, using MICROSOFT POWER POINT ® software. We obtain a paper with marks according to the pattern appearing in transmitted light similar to a shaded watermark translucent and nuanced. In direct vision in reflected light, we observe the pattern due to the shade of lamination glue. The rewetting solution did not penetrate all the paper due to the presence of glue.

    EXEMPLES 7 et 8 : CONTRASTE DE COULEUR EXAMPLES 7 and 8 : COLOR CONTRAST Exemple 7 :Example 7:

    A la solution de remouillage décrite précédente eau -éthanol, on ajoute 0,01 % en poids d'une poudre d'un colorant de nuançage, le VIOLET BB 200%.To the rewetting solution described above water-ethanol, 0.01% is added in weight of a powder of a shading dye, VIOLET BB 200%.

    Sur une feuille de papier blanc non couché de 80 g/m2 de format A4, commercialisé sous la marque RG® de la société GUERIMAND, on représente par remouillage et calandrage selon les conditions données ci-dessus, un motif qui est un personnage tenant à la main un parapluie fermé, à l'aide du logiciel POWER POINT ® de MICROSOFT. On obtient un papier présentant des marques selon le motif semblable à un filigrane translucide visible en lumière transmise. Le motif est également visible en lumière réfléchie grâce à sa nuance violette.On a sheet of uncoated white paper of 80 g / m 2 in A4 format, marketed under the brand RG® of the company GUERIMAND, a pattern which is a character holding is represented by rewetting and calendering according to the conditions given above. by hand a closed umbrella, using MICROSOFT POWER POINT ® software. We obtain a paper with marks according to the pattern similar to a translucent watermark visible in transmitted light. The pattern is also visible in reflected light thanks to its purple shade.

    Exemple 8:Example 8:

    A la solution de remouillage décrite précédente eau -éthanol, on n'ajoute que 0,005 % en poids d'une poudre d'un colorant de nuançage, le VIOLET BB 200%,To the rewetting solution described above water-ethanol, only 0.005 is added % by weight of a powder of a shading dye, VIOLET BB 200%,

    On réalise le pseudofiligrane comme à l'exemple 7. On obtient un papier présentant des marques selon le motif semblable à un filigrane translucide mais il a un meilleure visibilité en lumière transmise, du fait que la quantité de colorant est moindre que pour celui de l'exemple 7. On observe aussi le motif en lumière réfléchie grâce à sa nuance violette.The pseudofiligrane is produced as in Example 7. A paper is obtained having marks according to the pattern similar to a translucent watermark but it has better visibility in transmitted light, because the amount of dye is less than that from example 7. We also observe the pattern in reflected light thanks to its purple shade.

    EXEMPLE 9 : REACTION D'INFALSIFICATION COLOREE EXAMPLE 9 : COLORED INFALSIFICATION REACTION

    A la solution de remouillage décrite dans les conditions générales eau -éthanol, on ajoute 4 % en poids d'un colorant d'infalsification, le colorant appelé jaune DHTD , qui passse de incolore à jaune-marron sous l'action de l'hypochlorite de sodium.With the rewetting solution described in the general conditions water-ethanol, one adds 4% by weight of a forging dye, the dye called yellow DHTD, which pass from colorless to yellow-brown under the action of sodium hypochlorite.

    Sur une feuille de papier blanc non couché de 80 g/m2 de format A4, commercialisé sous la marque RG® de la société GUERIMAND S. A., on représente par remouillage et calandrage selon les conditions données ci-dessus, un mot et un dessin, à l'aide du logiciel POWER POINT ® de MICROSOFT. On obtient un papier présentant des marques non colorées selon le motif semblable à un filigrane translucide visible en lumière transmise. Si on applique de l'hypochlorite de sodium (eau de javel) comme agent de falsification, il se développe une couleur jaune-marron au niveau des marques qui met en évidence la tentative de falsification.On a sheet of uncoated white paper of 80 g / m 2 in A4 format, marketed under the brand RG® of the company GUERIMAND SA, a word and a drawing are represented by rewetting and calendering, using MICROSOFT POWER POINT ® software. One obtains a paper having non-colored marks according to the pattern similar to a translucent watermark visible in transmitted light. If sodium hypochlorite (bleach) is applied as a falsifying agent, a yellow-brown color develops at the marks which highlights the attempt at falsification.

    EXEMPLE 10 : CONTRASTE D'OPACITE ET DE FLUORESCENCE EXAMPLE 10 : OPACITY AND FLUORESCENCE CONTRAST

    A la solution de remouillage eau -éthanol décrite dans les conditions générales, on ajoute 2 % d'un agent fluorescent blanchissant commercialisé sous la marque Blancophor ® BSU PN.With the water-ethanol rewetting solution described in the general conditions, adds 2% of a whitening fluorescent agent sold under the Blancophor brand ® BSU PN.

    Sur un échantillon de papier velin non couché de 80 g/m2, fabriqué à partir de fibres de coton et ne contenant pas d'agent fluorescent blanchissant, on représente par remouillage et calandrage selon les conditions générales mentionnées ci-avant, le motif du personnage tenant à la main un parapluie fermé. On obtient un papier présentant des marques non colorées selon le motif semblable à un filigrane translucide visible en lumière transmise par contraste d'opacité et qui, en vision directe en lumière réfléchie, est plus ou moins révélé par contraste de nuance et de fluorescence selon que la lumière incidente d'observation, naturelle ou artificielle, comporte plus ou moins de rayonnement ultraviolet.On a sample of uncoated vellum paper of 80 g / m 2 , made from cotton fibers and containing no bleaching fluorescent agent, the pattern of the rewetting and calendering is represented according to the general conditions mentioned above. character holding a closed umbrella in his hand. One obtains a paper having non-colored marks according to the pattern similar to a translucent watermark visible in light transmitted by contrast of opacity and which, in direct vision in reflected light, is more or less revealed by contrast of shade and fluorescence depending on whether incident light, natural or artificial, contains more or less ultraviolet radiation.

    EXEMPLE 11:EXAMPLE 11:

    La solution de remouillage est constituée d'eau distillée et de 2 % en poids de 2-pyrrolidone (pureté 98 %).
    Après calandrage à 50°C d'un papier similaire à celui de l'exemple 3, sous une pression linéaire de 1,0 kN/cm, on obtient un papier avec un pseudo-filigrane conformément à l'invention, par contraste de nuance et opacité.    The rewetting solution consists of distilled water and 2% by weight of 2-pyrrolidone (98% purity).
    After calendering at 50 ° C a paper similar to that of Example 3, under a linear pressure of 1.0 kN / cm, a paper is obtained with a pseudo-watermark in accordance with the invention, by shade contrast and opacity.

    EXEMPLE 12:EXAMPLE 12:

    Sur une calandre molle de faible laize, une tête d'impression d'imprimante jet d'encre SCITEX 6240, a été installée à un mètre des rouleaux de la calandre. L'impression et la vitesse de calandrage sont synchronisées. Comme solution de remouillage du papier, on utilise un mélange d'eau déminéralisée et de 5% en volume d'éthanol. La calandre est composée de deux rouleaux; l'un est en acier et le contre-rouleau a un habillage en plastique. Ces rouleaux sont chauffés à 80°C et la pression linéaire entre les rouleaux est de 2,5 kN/cm.
    On déroule la bobine d'une feuille de papier blanc, on réalise un motif avec la solution de remouillage à l'aide de la tête d'impression sur la feuille, puis on fait passer ladite feuille entre les deux rouleaux de la calandre. La vitesse de défilement de la feuille de papier est de 20 m/mn.
    La feuille de papier sec a une épaisseur de 60 µm et a été densifiée dans les zones de remouillage par une réduction d'épaisseur de 16 µm. On obtient un papier avec un pseudo-filigrane conformément à l'invention, par réduction d'épaisseur.    On a soft, narrow web grille, a SCITEX 6240 inkjet printer printhead was installed one meter from the calender rollers. Printing and calendering speed are synchronized. As a rewetting solution for the paper, a mixture of demineralized water and 5% by volume of ethanol is used. The grille consists of two rollers; one is made of steel and the counter roller has a plastic covering. These rollers are heated to 80 ° C and the linear pressure between the rollers is 2.5 kN / cm.
    The coil is unwound from a sheet of white paper, a pattern is made with the rewetting solution using the print head on the sheet, then the said sheet is passed between the two rolls of the calender. The running speed of the paper sheet is 20 m / min.
    The dry paper sheet has a thickness of 60 μm and has been densified in the rewetting zones by a thickness reduction of 16 μm. A paper is obtained with a pseudo-watermark according to the invention, by reduction of thickness.

    Claims (19)

    1. Process for manufacturing an uncoated paper which includes at least one mark resembling a watermark, characterized in that the said mark is produced after the step of drying the paper, by carrying out the steps in which:
      a) a rewetting solution is applied to at least one side of the uncoated paper, in one or more defined areas; then
      b) pressure and heat are applied in the said area or areas of the rewetted paper so as to evaporate the said solution and compact the uncoated paper in the said area or areas relative to the rest of the paper, by applying the said pressure or heat over the entire surface of the sheet.
    2. Process according to Claim 1, characterized in that in step a) the said rewetting solution is applied to the paper by means of an ink-jet printing device, especially a digital ink-jet printing device, in which the ink is replaced with the said rewetting solution.
    3. Process according to either of Claims 1 and 2, characterized in that in step b) the said pressure and the said heat are applied by calendering the uncoated paper.
    4. Process according to one of Claims 1 to 3, characterized in that the said rewetting solution is an aqueous solution.
    5. Process according to one of Claims 1 to 4, characterized in that the said rewetting solution includes additives chosen from wetting agents, colouring agents, especially tinting agents, fluorescent whitening agents, fluorescence inhibitors, anti-counterfeiting agents and authentication agents.
    6. Process according to Claim 4, characterized in that the said aqueous solution is an aqueous alcoholic solution.
    7. Process according to one of Claims 4 to 6, characterized in that the said aqueous solution contains from 1 to 10% by volume of ethanol in water.
    8. Process according to Claim 4 or 5, characterized in that the said aqueous solution contains from 1 to 10% by weight of 2-pyrrolidone in water.
    9. Process according to one of Claims 1 to 8, characterized in that the said area or areas define a visual feature that can be seen in transmitted light, resulting from a reduction in opacity in the said area or areas.
    10. Process according to one of Claims 1 to 9, characterized in that the said area or areas define a visual feature that can be seen in reflected light, resulting from a colour difference in the said area or areas.
    11. Uncoated paper having at least one mark resembling a watermark and corresponding to one or more defined areas of the uncoated paper, carrying a reduction in thickness relative to the rest of the uncoated paper, characterized in that the mass per unit area in the said area or areas of the paper is identical to that of the rest of the paper and in that it is obtained by the process according to one of Claims 1 to 10.
    12. Uncoated paper according to Claim 11, characterized in that the said area or areas have a reduction in opacity relative to the rest of the paper.
    13. Uncoated paper according to either of Claims 11 and 12, characterized in that the said area or areas have a colour, especially a tint and/or a brightness, different from that of the rest of the paper.
    14. Uncoated paper according to one of Claims 11 to 13, characterized in that the said area or areas include agents chosen from colouring agents, fluorescent agents, fluorescence inhibitors, anti-counterfeiting agents and authentication agents.
    15. Uncoated paper according to one of Claims 11 to 14, characterized in that it consists of two or more fibrous plies.
    16. Uncoated paper according to the preceding claim, characterized in that only one of the surface plies has a reduction in thickness and/or a difference in tint and/or brightness in the said area or areas relative to the rest of the multi-ply paper.
    17. Uncoated paper according to one of Claims 11 to 16, characterized in that it is composed of two or more pasted paper sheets.
    18. Uncoated paper according to the preceding claim, characterized in that the pasting paste is coloured.
    19. Paper according to either of Claims 17 and 18, characterized in that only one of the sheets of the pasted paper has a reduction in thickness and/or a difference in tint and/or a difference in brightness in the said area or areas relative to the rest of the pasted paper.
    EP99973085A 1998-12-01 1999-11-29 Uncoated paper comprising a pseudo-watermark and method for making same Expired - Lifetime EP1135556B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    FR9815183A FR2786510B1 (en) 1998-12-01 1998-12-01 UNCOATED PAPER HAVING A PSEUDO-FILIGRANE AND MANUFACTURING METHOD
    FR9815183 1998-12-01
    PCT/FR1999/002947 WO2000032874A1 (en) 1998-12-01 1999-11-29 Uncoated paper comprising a pseudo-watermark and method for making same

    Publications (2)

    Publication Number Publication Date
    EP1135556A1 EP1135556A1 (en) 2001-09-26
    EP1135556B1 true EP1135556B1 (en) 2003-04-09

    Family

    ID=9533468

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP99973085A Expired - Lifetime EP1135556B1 (en) 1998-12-01 1999-11-29 Uncoated paper comprising a pseudo-watermark and method for making same

    Country Status (7)

    Country Link
    EP (1) EP1135556B1 (en)
    AT (1) ATE237030T1 (en)
    AU (1) AU1391600A (en)
    BR (1) BR9915844A (en)
    DE (1) DE69906789D1 (en)
    FR (1) FR2786510B1 (en)
    WO (1) WO2000032874A1 (en)

    Families Citing this family (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2861101B1 (en) * 2003-10-15 2007-06-15 Arjo Wiggins MULTIJET SAFETY PAPER
    CN101981254B (en) 2008-04-07 2013-09-11 Sca卫生用品公司 Hygiene or wiping product comprising at least one patterned ply and method for patterning the ply
    FR3022489B1 (en) 2014-06-23 2021-10-29 Arjowiggins Security SECURITY PAPERS AND MANUFACTURING METHODS.
    TW201700831A (en) * 2015-04-06 2017-01-01 Seiko Epson Corp Sheet manufacturing apparatus and sheet manufacturing method

    Family Cites Families (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US4824486A (en) * 1985-11-04 1989-04-25 Westvaco Corporation Simulated watermark printing system
    SE505397C2 (en) * 1995-11-09 1997-08-18 Mo Och Domsjoe Ab Surface-treated security paper and method and apparatus for producing surface-treated security paper
    DE29714004U1 (en) * 1997-08-06 1997-11-06 Helmstreit Herbert Means for ink jet printing of artificial watermarks

    Also Published As

    Publication number Publication date
    BR9915844A (en) 2002-01-15
    FR2786510A1 (en) 2000-06-02
    DE69906789D1 (en) 2003-05-15
    WO2000032874A1 (en) 2000-06-08
    EP1135556A1 (en) 2001-09-26
    AU1391600A (en) 2000-06-19
    ATE237030T1 (en) 2003-04-15
    FR2786510B1 (en) 2001-02-16

    Similar Documents

    Publication Publication Date Title
    EP1023501B1 (en) Coated paper comprising a pseudo-watermark and method for making same
    EP2198086B1 (en) Sheet having at least one watermark or pseudo-watermark observable only on one side of the sheet
    EP1987197B1 (en) Film material comprising at least one watermark having a coloured nuance
    EP2082097B1 (en) Security film comprising a fibrous substrate
    CA2709329A1 (en) Security sheet including a fibrous substrate comprising at least one watermark
    WO2013072849A1 (en) Multilayer structure
    US8632101B2 (en) Method for securing a coloured opaque object
    EP1135556B1 (en) Uncoated paper comprising a pseudo-watermark and method for making same
    WO1995009276A1 (en) Improvement in security features for paper
    EP1825055B1 (en) Glossy paper
    FR2929965A1 (en) SECURITY SHEET HAVING A RIBBON HAVING A REDUCED OPERATING AREA.
    EP2516113B1 (en) Method for manufacturing a sheet by means of compregnation in order to form an area made transparent
    EP0563245B1 (en) Printable ribbed coated sheet and process for producing same
    WO2016012512A1 (en) Method for securing a substrate and corresponding secure document
    WO2013030784A1 (en) Data medium intended for printing on liquid toner presses
    WO2014097146A1 (en) Information support for printing on offset presses

    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: 20010615

    AK Designated contracting states

    Kind code of ref document: A1

    Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

    AX Request for extension of the european patent

    Free format text: AL;LT;LV;MK;RO;SI

    GRAG Despatch of communication of intention to grant

    Free format text: ORIGINAL CODE: EPIDOS AGRA

    17Q First examination report despatched

    Effective date: 20020422

    RAP1 Party data changed (applicant data changed or rights of an application transferred)

    Owner name: ARJO WIGGINS

    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

    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

    Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

    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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20030409

    Ref country code: IT

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

    Effective date: 20030409

    Ref country code: IE

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

    Effective date: 20030409

    Ref country code: GB

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20030409

    Ref country code: FI

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20030409

    Ref country code: AT

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20030409

    REG Reference to a national code

    Ref country code: GB

    Ref legal event code: FG4D

    Free format text: NOT ENGLISH

    REG Reference to a national code

    Ref country code: CH

    Ref legal event code: EP

    REG Reference to a national code

    Ref country code: IE

    Ref legal event code: FG4D

    Free format text: FRENCH

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

    Ref country code: SE

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20030709

    Ref country code: PT

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20030709

    Ref country code: GR

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20030709

    Ref country code: DK

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20030709

    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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20030710

    NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
    GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

    Effective date: 20030409

    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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20031030

    REG Reference to a national code

    Ref country code: IE

    Ref legal event code: FD4D

    Ref document number: 1135556E

    Country of ref document: IE

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

    Ref country code: LU

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

    Effective date: 20031129

    Ref country code: CY

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20031129

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

    Ref country code: MC

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

    Effective date: 20031130

    Ref country code: LI

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

    Effective date: 20031130

    Ref country code: CH

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

    Effective date: 20031130

    Ref country code: BE

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

    Effective date: 20031130

    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

    Effective date: 20040112

    BERE Be: lapsed

    Owner name: *ARJO WIGGINS

    Effective date: 20031130

    REG Reference to a national code

    Ref country code: CH

    Ref legal event code: PL

    REG Reference to a national code

    Ref country code: FR

    Ref legal event code: PLFP

    Year of fee payment: 17

    REG Reference to a national code

    Ref country code: FR

    Ref legal event code: PLFP

    Year of fee payment: 18

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

    Ref country code: FR

    Payment date: 20161130

    Year of fee payment: 18

    REG Reference to a national code

    Ref country code: FR

    Ref legal event code: ST

    Effective date: 20180731

    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: 20171130