EP0679122A1 - Method for embossing a sheet with one or more plies - Google Patents

Method for embossing a sheet with one or more plies

Info

Publication number
EP0679122A1
EP0679122A1 EP94904672A EP94904672A EP0679122A1 EP 0679122 A1 EP0679122 A1 EP 0679122A1 EP 94904672 A EP94904672 A EP 94904672A EP 94904672 A EP94904672 A EP 94904672A EP 0679122 A1 EP0679122 A1 EP 0679122A1
Authority
EP
European Patent Office
Prior art keywords
sheet
embossing
cylinders
bosses
plies
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94904672A
Other languages
German (de)
French (fr)
Other versions
EP0679122B1 (en
Inventor
Rémy Ruppel
Pierre Laurent
Jo[L Hungler
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.)
Essity Operations France SAS
Original Assignee
Kaysersberg SA
Fort James France
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 Kaysersberg SA, Fort James France filed Critical Kaysersberg SA
Publication of EP0679122A1 publication Critical patent/EP0679122A1/en
Application granted granted Critical
Publication of EP0679122B1 publication Critical patent/EP0679122B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/07—Embossing, i.e. producing impressions formed by locally deep-drawing, e.g. using rolls provided with complementary profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0723—Characteristics of the rollers
    • B31F2201/0728—Material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0741—Roller cooperating with a non-even counter roller
    • B31F2201/0743—Roller cooperating with a non-even counter roller having a matching profile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0758—Characteristics of the embossed product
    • B31F2201/0761—Multi-layered
    • B31F2201/0764—Multi-layered the layers being nested
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0784—Auxiliary operations
    • B31F2201/0787—Applying adhesive
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1007—Running or continuous length work
    • Y10T156/1023—Surface deformation only [e.g., embossing]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1712—Indefinite or running length work
    • Y10T156/1737—Discontinuous, spaced area, and/or patterned pressing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1712—Indefinite or running length work
    • Y10T156/1741—Progressive continuous bonding press [e.g., roll couples]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24628—Nonplanar uniform thickness material
    • Y10T428/24669—Aligned or parallel nonplanarities

Definitions

  • the invention relates to the field of fibrous products, in particular sanitary and household papers, made of cellulose wadding. It relates to a method of embossing a sheet with one or more plies, as well as a sheet of embossed paper for the purpose of use as toilet paper, napkin or paper towel in particular.
  • embossing a sheet with one or more plies as well as a sheet of embossed paper for the purpose of use as toilet paper, napkin or paper towel in particular.
  • it is sought to produce products which have bulk because this character is associated by the user with the properties of absorption, softness and appearance.
  • the bulk is increased by embossing the sheet and, if necessary, by making a sheet from two or more embossed plies.
  • US Pat. No. 3,556,907 is known, which teaches a method of making paper, in particular with two folds or elementary sheets of crepe paper.
  • the plies are embossed separately, with protrusions or bosses on one side, and are combined by bringing said faces closer to one another with interlocking of the protrusions; the installation comprises two embossing units, each with a steel cylinder and a rubber cylinder, and a matching cylinder separate from the embossing cylinders.
  • the matching cylinder made of rubber, cooperates with one of the metal cylinders to ensure the association of the folds.
  • the sheet which has been embossed by the cylinder not in contact with the matching cylinder undergoes, due to its capacity to elongate, a slight but noticeable deformation, when it is detached from its cylinder to come under the matching cylinder . It is therefore necessary to provide sufficient spacing between the protrusions to allow their nesting. The maximum allowable density is thus limited. In fact, a high density would cause the protuberances to overlap.
  • US Patent 3940529 describes an absorbent two-ply product.
  • the folds each have a pattern made by embossing with depressed areas and raised areas.
  • the raised areas on one fold are arranged between the raised areas of the other fold. and the connection is made by mechanical welding of the sides between the bottom and the top of the reliefs. This mechanical welding results in a loss of mechanical strength with perforation of the sheet at this level.
  • the installation comprises two metallic embossing cylinders, provided with reliefs or spikes, meshing one inside the other.
  • the distance between the elementary reliefs is less than their width so that the sheet is strongly compressed along the sides of these reliefs, and welded.
  • US Pat. No. 4,325,773 describes a method of assembling two plies where the latter have been previously embossed separately.
  • the two embossing cylinders, meshing one inside the other, ensure the association of the folds. It is observed that the embossing pattern consists of reliefs of elongated shape relatively spaced from each other.
  • US Patent 4,759,967 describes an embossing mode for a multiple sheet consisting of bonding the plies together beforehand by means of an adhesive spray and then embossing the sheet between two metallic embossing rolls.
  • the embossing pattern on the cylinders consists of alternating cavities with raised areas relative to the plane of the surface. The two cylinders mesh with one another, the reliefs of a cylinder engaging in the cavities of the second. It should be noted that these cylinders have been engraved together.
  • the thickness el at the level of the ply bonding zones equal to the sum of the thicknesses of the plies, is less than that e2 of the zones, intermediate between two zones of collage, which form air pockets.
  • the subject of the invention is a method of manufacturing by embossing a sheet with at least one fold according to which the latter is engaged between two metal cylinders provided with protuberances, driven in rotation by means known per se, and meshing with each other with a clearance el between the apex of the protuberances of a cylinder and the surface of the cylinder opposite, and a clearance e2 between the sides of two adjacent protuberances.
  • This process is characterized in that el and e2 are determined in the transverse direction with respect to the machine direction so that the ratio el / e2 is between 0.8 and 1.
  • a sheet which combines the advantage of a rubber / steel embossing and a steel / steel embossing, that is to say a sheet the thickness of which is substantially uniform. by presenting an improved softness by the effect of calendering produced on the top of the raised areas of the sheet.
  • a sheet with at least two plies is produced by causing at least one of the two plies to match the surface of one of the cylinders in the application by means of a rubber cylinder.
  • the two folds can be shaped beforehand and glued by depositing an adhesive on at least part of the raised areas on the cylinders before they are combined.
  • the clearance el is between 5/100 and 5/10 mm and corresponds at most to the sum of the thicknesses of the folds constituting the sheet.
  • a sheet with at least two folds is thus produced, which, compared to a sheet of prior art of the nested type, "nested", may include a greater number of bosses. This results in better resistance to crushing.
  • rollers with a smaller diameter can be obtained for the same sheet length, which reduces the storage volume.
  • the calendering effect produced by contact with the two metal cylinders provides softness to the touch.
  • Figure 1 shows in section a two-ply sheet of the prior art.
  • Figure 2 shows in section the combination of two conjugate cylinders of the prior art.
  • FIG. 3 represents an installation allowing the implementation of the invention for the production of a sheet with one fold or with several folds previously bound.
  • FIG. 4 represents a sectional view along IV of FIG. 3.
  • FIG. 5 represents an installation allowing the implementation of the invention for the production of a sheet with at least two folds.
  • FIG. 6 represents a sectional view along VI of FIG. 5.
  • FIG. 7 shows another embodiment for producing a 3-ply paper.
  • Figure 1 shows, in cross section, a sheet 1 of the prior art with two folds 2 and 3 nested one inside the other.
  • the method of manufacturing such a sheet is taught for example in US patent 3556907.
  • the fold 2 has bosses 4 obtained by embossing, these bosses are spaced regularly from each other and turned towards the fold 3 which also has bosses 5, .turned towards the fold 2. These are fitted between the bosses 4.
  • the spacing between the bosses 4 and 5 is sufficient to create a vacuum 6 between them.
  • the thickness of the sheet varies between a minimum value el where the bosses of a fold are in contact with the opposite fold, and a value e2 between two adjacent bosses.
  • the ratio e1 / e2 is low, of the order of 0.1. Indeed, it corresponds to the thickness of the 2 plies of crepe absorbent paper, for example 0.2 mm and e2 was measured at 1.85 mm.
  • Figure 2 shows the embossing interval of two cylinders, in section in the plane passing through the axis of the two cylinders.
  • the metal cylinder 7 has radial projections 8 regularly distributed on the surface; similarly the cylinder 7 'has projections 8' of the same dimension.
  • the usual technique of engraving a pair of such cylinders consists in engraving a first cylinder by means of a wheel made of a material harder than that of the cylinder. Once this first cylinder is made, the second cylinder is engraved using the first so as to obtain two conjugate patterns which perfectly overlap one another.
  • FIG. 3 Schematically shown in Figure 3 an embossing installation 10 of a sheet with a fold or a multiple sheet previously bonded, with two cylinders 11, 12 arranged in parallel and driven by conventional means in the direction of the arrows.
  • the cylinders 11, 12, made of metal or of another equivalent material, are provided, on the surface, with pins 13, 14, extending radially outwards.
  • the cylinders are positioned relative to each other so as to mesh with one another, the pins 13 of the cylinder 11 coming to be placed between the pins 14 of the cylinder 12 in the embossing interval .
  • the sheet 15 of crepe paper is engaged between the cylinders 11 and 12 and emerges therefrom having on each face of the bosses corresponding to the pins of the cylinders.
  • Figure 4 is an enlarged view of a section made by a plane passing through the axis of the two cylinders and shows a configuration of the pins according to the invention.
  • the pins are identical on the two cylinders and are distributed in the same pattern with steps in the direction of travel, respec ⁇ tively in the cross direction, identical.
  • the running direction is that of the direction of scrolling of the sheet; the creping lines are perpendicular to it.
  • the transverse direction is defined as forming an angle of plus or minus 45 ° relative to the perpendicular to the running direction.
  • the pattern has a transverse direction perpendicular to the running direction.
  • the pins have a height of between 0.5 and 1.5 mm.
  • the embossing interval between the two cylinders is equal to el between the top of the pins 13 of the first cylinder and the bottom of the engraving between the two adjacent pins 14 of the second cylinder. It is equal to e2 between the flanks of two adjacent pins 13 and 14.
  • the clearance el is a function of the spacing which has been fixed between the two cylinders.
  • the value of the e2 clearance depends, for its part, on the geometric parameters of the pins.
  • P of the given pattern it is a function of the angle at the top ⁇ of the pins as well as their width L at the top. In practice the angle ⁇ is between 25 and 35 ° and the width at the top is 0.1 and 1.2 mm.
  • el and e2 are determined so that the ratio el / e2 is less than or equal to 1 and greater than 0.8.
  • the value el will be chosen at most equal to the thickness of the sheet to be embossed. This ensures calendering of the sheet at the top of the bosses obtained, providing improved softness to the touch.
  • FIG. 5 shows an embossing installation for the formation of a two-ply sheet.
  • This installation per se of the conventional type comprises two cylinders 111, 112, made of metal or an equivalent material, arranged in parallel and driven by conventional means in the direction of the arrows.
  • the cylinders 111 and 112 are provided with pins 113, 114 extending radially outward and meshing with one another.
  • a pressure cylinder 119, 120 coated with rubber or other elastomeric material is associated with each of the cylinders 111 and 112.
  • Two plies of crepe paper 115, 115 ′ are engaged respectively between the cylinders 111 and 119, and 112 and 120 and are pressed on their respective embossing cylinder, the relief of which they follow.
  • a sizing device 121 also known per se, deposits an adhesive substance on the tops of the raised areas of the fold 115, then the two folds are entrained in the embossing interval between the two rolls 111 and 112 where they combine into one sheet.
  • This sheet 115-115 ' is then transformed into a finished product such as, for example, a household paper towel.
  • FIG. 6 represents an enlarged view of a section made along a plane passing through the axis of the two cylinders 111 and 112.
  • the two folds 115, 115 ' substantially match the outline of the pins 113 and 114 respectively.
  • the clearance between the two cylinders is equal to el between the tops of the pins and the bottom of the engraving facing it. It is equal to e2 at the flanks.
  • the clearance el is determined so that it is at most equal to the thickness of the two plies so as to ensure on the one hand the bonding at this level, on the other hand an action of calendering.
  • the geometry of the pins is determined so that the ratio el / e2 is between 0.8 and 1. This ensures the formation of a sheet, where the air pocket is reduced.
  • the value of the ratio el / e2 has been determined so that it is between 0.2 and 1. In particular, this must be between 0.2 and 0.5.
  • FIG. 7 shows an embodiment of a 3-ply sheet. The installation is similar to that of FIG. 5. Each common element has been designated by the same reference. It includes an additional sizing machine 122 and a 115 "paper feed.
  • Each of the glueers 121, 122 deposits an adhesive substance on at least part of the tops of the reliefs of the plies 115 and 115 ". These are applied against the metal cylinders 111 and 112 by means of the rubber cylinders 119, 120.
  • the two plies 115, 115 ' are driven in the direction of the arrows as far as the engagement interval of the two cylinders 111 and 112.
  • a third fold 115 " is driven between the two folds 115, 115' at the time of their engagement in said interval. Thanks to the invention, with el / e2 and el less than or equal to the sum of the 3 ply thicknesses, the plies 115 are connected with 115 "and 115" with 115 '.

Abstract

PCT No. PCT/FR94/00042 Sec. 371 Date Jul. 14, 1995 Sec. 102(e) Date Jul. 14, 1995 PCT Filed Jan. 13, 1994 PCT Pub. No. WO94/15776 PCT Pub. Date Jul. 21, 1994A method for embossing a sheet of creped paper composed of at least one ply, whereby the sheet is engaged between two metallic cylinders fitted with protrusions and driven in rotation in a conventional manner and mesh with each other while having a play e1 between the tops of the protrusions of one cylinder and the opposite surface of the other cylinder, and a play e2 between the slopes of two adjacent protrusions wherein e1 and e2 are determined in the direction transverse to the direction of paper advance in such a manner that the ratio of e1/e2 is between 0.8 and 1.

Description

PROCEDE DE GAUFRAGE D'UNE FEUILLE A UN OU PLUSIEURS PLIS. FEUILLE DE PAPIER GAUFRE PROCESS FOR EMBOSSING A SHEET WITH ONE OR MORE PLIES. WAFER PAPER SHEET
L'invention se rapporte au domaine des produits fibreux, notamment des papiers sanitaires et domestiques, en ouate de cellulose. Il concerne un procédé de gaufrage d'une feuille à un ou plusieurs plis, ainsi qu'une feuille de papier gaufré dans le but d'une utilisation comme papier hygiénique, serviette ou essuie-tout en particulier. Dans l'industrie du papier sanitaire et domestique, on cherche à réaliser des produits qui présentent du bouffant car ce caractère est associé par l'utilisateur aux propriétés d'absorption, de douceur et d'aspect. On augmente le bouffant en gaufrant la feuille et, le cas échéant, en confectionnant une feuille à partir de deux ou plusieurs plis gaufrés.The invention relates to the field of fibrous products, in particular sanitary and household papers, made of cellulose wadding. It relates to a method of embossing a sheet with one or more plies, as well as a sheet of embossed paper for the purpose of use as toilet paper, napkin or paper towel in particular. In the sanitary and domestic paper industry, it is sought to produce products which have bulk because this character is associated by the user with the properties of absorption, softness and appearance. The bulk is increased by embossing the sheet and, if necessary, by making a sheet from two or more embossed plies.
On connaît le brevet US 3556907 qui enseigne un mode de fabri¬ cation de papier, notamment, à deux plis ou feuilles élémentaires de papier crêpé. Les plis sont gaufrés séparément, avec des protubérances ou bossages sur une face, et sont combinés par rapprochement desdites faces l'une de l'autre avec emboîtement des protubérances ; l'installation comprend deux unités de gaufrage, chacune avec un cylindre acier et un cylindre caoutchouc, et un cylindre marieur distinct des cylindres de gaufrage. Le cylindre marieur, en caoutchouc, coopère avec l'un des cylindres métalliques pour assurer l'association des plis. La feuille qui a été gaufrée par le cylindre non en contact avec le cylindre marieur subit, du fait de sa capacité à s'allonger, une déformation, légère mais notable, au moment où elle est décollée de son cylindre pour venir sous le cylindre marieur. Il est de ce fait nécessaire de prévoir un espacement suffisant entre les protubérances pour permettre leur emboîtement. La densité maximale admissible est ainsi limitée. En effet, une forte densité entraînerait le chevauchement des protubérances.US Pat. No. 3,556,907 is known, which teaches a method of making paper, in particular with two folds or elementary sheets of crepe paper. The plies are embossed separately, with protrusions or bosses on one side, and are combined by bringing said faces closer to one another with interlocking of the protrusions; the installation comprises two embossing units, each with a steel cylinder and a rubber cylinder, and a matching cylinder separate from the embossing cylinders. The matching cylinder, made of rubber, cooperates with one of the metal cylinders to ensure the association of the folds. The sheet which has been embossed by the cylinder not in contact with the matching cylinder undergoes, due to its capacity to elongate, a slight but noticeable deformation, when it is detached from its cylinder to come under the matching cylinder . It is therefore necessary to provide sufficient spacing between the protrusions to allow their nesting. The maximum allowable density is thus limited. In fact, a high density would cause the protuberances to overlap.
Dans la pratique, on trouve des produits à 12 protubérances par cm2 au maximum bien que le brevet en autorise jusqu'à 30 au cm2.In practice, there are products with 12 protuberances per cm 2 at most, although the patent allows up to 30 per cm 2 .
Le brevet US 3940529 décrit un produit absorbant à deux plis. Les plis présentent chacun un motif réalisé par gaufrage avec des zones en dépression et des zones en relief. Les zones en relief sur un pli sont disposées entre les zones en relief de l'autre pli. et la liaison est réalisée par soudage mécanique des flancs entre le fond et le sommet des reliefs. Ce soudage mécanique entraîne une perte de résistance mécanique avec perforation de la feuille à ce niveau.US Patent 3940529 describes an absorbent two-ply product. The folds each have a pattern made by embossing with depressed areas and raised areas. The raised areas on one fold are arranged between the raised areas of the other fold. and the connection is made by mechanical welding of the sides between the bottom and the top of the reliefs. This mechanical welding results in a loss of mechanical strength with perforation of the sheet at this level.
L'installation comprend deux cylindres gaufreurs métalliques, pourvus de reliefs ou picots, s'engrenant l'un dans l'autre. L'écarte ent entre les reliefs élémentaires est inférieur à leur largeur de façon que la feuille soit fortement comprimée le long des flancs de ces reliefs, et soudée.The installation comprises two metallic embossing cylinders, provided with reliefs or spikes, meshing one inside the other. The distance between the elementary reliefs is less than their width so that the sheet is strongly compressed along the sides of these reliefs, and welded.
Le brevet US 4325773 décrit un mode d'assemblage de deux plis où ces derniers ont été préalablement gaufrés séparément. Les deux cylindres gaufreurs, engrenant l'un dans l'autre, assurent l'asso- ciation des plis. On observe que le motif de gaufrage est constitué de reliefs de forme allongée relativement espacés les uns des autres.US Pat. No. 4,325,773 describes a method of assembling two plies where the latter have been previously embossed separately. The two embossing cylinders, meshing one inside the other, ensure the association of the folds. It is observed that the embossing pattern consists of reliefs of elongated shape relatively spaced from each other.
Le brevet US 4759967 décrit un mode de gaufrage pour une feuille multiple consistant à lier les plis entre eux préalablement au moyen d'une pulvérisation d'adhésif puis à gaufrer la feuille entre deux cylindres gaufreurs métalliques. Le motif de gaufrage sur les cylindres est constitué de cavités alternant avec des zones en relief par rapport au plan de la surface. Les deux cylindres engrènent l'un dans l'autre, les reliefs d'un cylindre venant en prise dans les cavités du second. Il est à noter que ces cylindres ont été gravés de façon conjuguée.US Patent 4,759,967 describes an embossing mode for a multiple sheet consisting of bonding the plies together beforehand by means of an adhesive spray and then embossing the sheet between two metallic embossing rolls. The embossing pattern on the cylinders consists of alternating cavities with raised areas relative to the plane of the surface. The two cylinders mesh with one another, the reliefs of a cylinder engaging in the cavities of the second. It should be noted that these cylinders have been engraved together.
L'examen de cet art antérieur montre que, jusqu'à présent, on a réalisé des produits gaufrés dont l'épaisseur apparente, c'est à dire la distance séparant les deux faces de la feuille n'est pas constante.Examination of this prior art shows that, up to now, embossed products have been produced whose apparent thickness, that is to say the distance separating the two faces of the sheet is not constant.
Sur les produits de type à plis emboîtés, "nested" , l'épais¬ seur el au niveau des zones de collage des plis, égale à la somme des épaisseurs des plis, est inférieure à celle e2 des zones, intermédiaires entre deux zones de collage, qui forment des poches d'air.On nested pleated type products, the thickness el at the level of the ply bonding zones, equal to the sum of the thicknesses of the plies, is less than that e2 of the zones, intermediate between two zones of collage, which form air pockets.
L'invention a pour objet un procédé de fabrication par gaufrage d'une feuille à au moins un pli selon lequel on engage celle-ci entre deux cylindres métalliques pourvus de protubérances, entraînés en rotation par des moyens connus en soi, et s'engrenant l'un dans l'autre avec un jeu el entre le sommet des protubérances d'un cylindre et la surface du cylindre en vis-à-vis, et un jeu e2 entre les flancs de deux protubérances adjacentes. Ce procédé est caractérisé en ce que l'on détermine el et e2 dans le sens travers par rapport au sens machine de telle façon que le rapport el/e2 soit compris entre 0,8 et 1.The subject of the invention is a method of manufacturing by embossing a sheet with at least one fold according to which the latter is engaged between two metal cylinders provided with protuberances, driven in rotation by means known per se, and meshing with each other with a clearance el between the apex of the protuberances of a cylinder and the surface of the cylinder opposite, and a clearance e2 between the sides of two adjacent protuberances. This process is characterized in that el and e2 are determined in the transverse direction with respect to the machine direction so that the ratio el / e2 is between 0.8 and 1.
Grâce à l'invention on obtient une feuille combinant l'avan¬ tage d'un gaufrage caoutchouc/acier et d'un gaufrage acier/ acier c'est-à-dire une feuille dont l'épaisseur est sensiblement uni¬ forme, tout en présentant une douceur améliorée par l'effet du calandrage produit sur le sommet des zones en relief de la feuille.Thanks to the invention, a sheet is obtained which combines the advantage of a rubber / steel embossing and a steel / steel embossing, that is to say a sheet the thickness of which is substantially uniform. by presenting an improved softness by the effect of calendering produced on the top of the raised areas of the sheet.
Conformément à une autre caractéristique de l'invention, on réalise une feuille à au moins deux plis en amenant au moins l'un des deux plis à épouser la surface de l'un des cylindres en l'appli¬ quant au moyen d'un cylindre caoutchouc. En particulier, on peut conformer les deux plis au préalable et les coller en déposant un adhésif sur au moins une partie des zones en relief sur les cylin¬ dres avant leur association.In accordance with another characteristic of the invention, a sheet with at least two plies is produced by causing at least one of the two plies to match the surface of one of the cylinders in the application by means of a rubber cylinder. In particular, the two folds can be shaped beforehand and glued by depositing an adhesive on at least part of the raised areas on the cylinders before they are combined.
Selon une autre caractéristique, le jeu el est compris entre 5/100 et 5/10 mm et correspond au plus à la somme des épaisseurs des plis constituant la feuille. On réalise de la sorte une feuille à deux plis au moins, qui, par rapport à une feuille de l'art anté¬ rieur du type emboîté, "nested", peut comprendre un nombre de bossages plus impor ant. Il s'ensuit une meilleure résistance à l'écrasement. Par ailleurs on peut obtenir des rouleaux de diamètre inférieur pour une même longueur de feuille, ce qui réduit le volume au stockage. Enfin, l'effet de calandrage produit par le contact avec les deux cylindres métalliques procure de la douceur au toucher.According to another characteristic, the clearance el is between 5/100 and 5/10 mm and corresponds at most to the sum of the thicknesses of the folds constituting the sheet. A sheet with at least two folds is thus produced, which, compared to a sheet of prior art of the nested type, "nested", may include a greater number of bosses. This results in better resistance to crushing. In addition, rollers with a smaller diameter can be obtained for the same sheet length, which reduces the storage volume. Finally, the calendering effect produced by contact with the two metal cylinders provides softness to the touch.
L'invention est décrite plus en détail ci-après en référence aux dessins sur lesquels :The invention is described in more detail below with reference to the drawings in which:
La figure 1 représente en coupe une feuille à deux plis de l'art antérieur.Figure 1 shows in section a two-ply sheet of the prior art.
La figure 2 représente en coupe la combinaison de deux cylindres conjugués de l'art antérieur.Figure 2 shows in section the combination of two conjugate cylinders of the prior art.
La figure 3 représente une installation permettant la mise en oeuvre de l'invention pour la réalisation d'une feuille à un pli ou à plusieurs plis préalablement liés.FIG. 3 represents an installation allowing the implementation of the invention for the production of a sheet with one fold or with several folds previously bound.
La figure 4 représente une vue en coupe selon IV de la figure 3. La figure 5 représente une installation permettant la mise en oeuvre de l'invention pour la réalisation d'une feuille à au moins deux plis.FIG. 4 represents a sectional view along IV of FIG. 3. FIG. 5 represents an installation allowing the implementation of the invention for the production of a sheet with at least two folds.
La figure 6 représente une vue en coupe selon VI de la figure 5.FIG. 6 represents a sectional view along VI of FIG. 5.
. La figure 7 représente un autre mode de réalisation pour la réalisation d'un papier 3 plis.. FIG. 7 shows another embodiment for producing a 3-ply paper.
La figure 1 représente, en coupe transversale, une feuille 1 de l'art antérieur à deux plis 2 et 3 emboîtés l'un dans l'autre. Le mode de fabrication d'une telle feuille est enseigné par exemple dans le brevet US 3556907. Le pli 2 comporte des bossages 4 obtenus par gaufrage, ces bossages sont espacés régulièrement les uns des autres et tournés vers le pli 3 qui comporte également des bossages 5, .tournés vers le pli 2. Ceux-ci sont emboîtés entre les bossages 4. L'écartement entre les bossages 4 et 5 est suffisant pour ménager un vide 6 entre eux.Figure 1 shows, in cross section, a sheet 1 of the prior art with two folds 2 and 3 nested one inside the other. The method of manufacturing such a sheet is taught for example in US patent 3556907. The fold 2 has bosses 4 obtained by embossing, these bosses are spaced regularly from each other and turned towards the fold 3 which also has bosses 5, .turned towards the fold 2. These are fitted between the bosses 4. The spacing between the bosses 4 and 5 is sufficient to create a vacuum 6 between them.
L'épaisseur de la feuille varie entre une valeur minimale el à l'endroit où les bossages d'un pli sont en contact avec le pli opposé, et une valeur e2 entre deux bossages adjacents. Dans la pratique, pour un papier absorbant à usage d'essuie-tout, le rapport el/e2 est faible, de l'ordre de 0,1. En effet el corres¬ pond à l'épaisseur des 2 plis de papier crêpé absorbant, par exemple 0,2 mm et e2 a été mesuré à 1,85 mm.The thickness of the sheet varies between a minimum value el where the bosses of a fold are in contact with the opposite fold, and a value e2 between two adjacent bosses. In practice, for absorbent paper used as a paper towel, the ratio e1 / e2 is low, of the order of 0.1. Indeed, it corresponds to the thickness of the 2 plies of crepe absorbent paper, for example 0.2 mm and e2 was measured at 1.85 mm.
Il est connu également de réaliser des gaufrages par enga- gement de la feuille à gaufrer entre deux cylindres métalliques engrenant l'un dans l'autre. A la connaissance de la Demanderesse, la façon dont sont gravés les cylindres dans cette hypothèse conduit à la réalisation de produits dont l'épaisseur n'est pas uniforme. La Figure 2 représente l'intervalle de gaufrage de deux cylindres, en coupe dans le plan passant par l'axe des deux cylindres.It is also known to produce embossings by engaging the sheet to be embossed between two metal cylinders meshing one inside the other. To the knowledge of the Applicant, the way in which the cylinders are engraved in this hypothesis leads to the production of products whose thickness is not uniform. Figure 2 shows the embossing interval of two cylinders, in section in the plane passing through the axis of the two cylinders.
Le cylindre métallique 7 comporte des projections radiales 8 régulièrement réparties en surface ; de même le cylindre 7' comporte des projections 8' de même dimension. La technique usuelle de gravure d'une paire de tels cylindres consiste à graver un premier cylindre au moyen d'une molette en un matériau plus dur que celui du cylindre. Une fois ce premier cylindre réalisé, on grave le second cylindre au moyen du premier de façon à obtenir deux motifs conjugués qui s'imbriquent parfai¬ tement l'un dans l'autre.The metal cylinder 7 has radial projections 8 regularly distributed on the surface; similarly the cylinder 7 'has projections 8' of the same dimension. The usual technique of engraving a pair of such cylinders consists in engraving a first cylinder by means of a wheel made of a material harder than that of the cylinder. Once this first cylinder is made, the second cylinder is engraved using the first so as to obtain two conjugate patterns which perfectly overlap one another.
Lorsqu'on associe les deux cylindres, dans une machine de gaufrage, on les place parallèlement l'un à l'autre avec un jeu correspondant sensiblement à l'épaisseur de la feuille à gaufrer. La coupe de l'intervalle de gaufrage entre les deux cylindres à la figure 2 montre que la distance el entre le sommet d'un picot et le fond de la gravure qui lui fait face est supérieure à la distance e2 séparant les flancs de deux projections adjacentes mesurée sensiblement à mi-hauteur des picots.When the two cylinders are combined, in an embossing machine, they are placed parallel to each other with a clearance corresponding substantially to the thickness of the sheet to be embossed. The section of the embossing interval between the two cylinders in Figure 2 shows that the distance el between the top of a pin and the bottom of the engraving facing it is greater than the distance e2 separating the sides of two projections adjacent measured substantially at mid-height of the pins.
On a présenté schématiquement sur la figure 3 une installation de gaufrage 10 d'une feuille à un pli ou d'une feuille multiple préalablement liée, avec deux cylindres 11, 12 disposés en parallèle et entraînés par des moyens conventionnels dans le sens des flèches. Les cylindres 11, 12, métalliques ou en un autre matériau équivalent, sont pourvus, sur la surface, de picots 13, 14, s'étendant radialement vers l'extérieur.Schematically shown in Figure 3 an embossing installation 10 of a sheet with a fold or a multiple sheet previously bonded, with two cylinders 11, 12 arranged in parallel and driven by conventional means in the direction of the arrows. The cylinders 11, 12, made of metal or of another equivalent material, are provided, on the surface, with pins 13, 14, extending radially outwards.
Les cylindres sont positionnés l'un par rapport à l'autre de façon à venir s'engrener l'un dans l'autre, les picots 13 du cylindre 11 venant se placer entre les picots 14 du cylindre 12 dans l'intervalle de gaufrage. La feuille 15 de papier crêpé est engagée entre les cylindres 11 et 12 et en émerge en présentant sur chaque face des bossages correspondant aux picots des cylindres.The cylinders are positioned relative to each other so as to mesh with one another, the pins 13 of the cylinder 11 coming to be placed between the pins 14 of the cylinder 12 in the embossing interval . The sheet 15 of crepe paper is engaged between the cylinders 11 and 12 and emerges therefrom having on each face of the bosses corresponding to the pins of the cylinders.
La figure 4 est une vue agrandie d'une coupe réalisée par un plan passant par l'axe des deux cylindres et représente une configuration des picots conforme à l'invention.Figure 4 is an enlarged view of a section made by a plane passing through the axis of the two cylinders and shows a configuration of the pins according to the invention.
Les picots sont identiques sur les deux cylindres et sont répartis selon le même motif avec des pas sens marche, respec¬ tivement sens travers, identiques. Le sens marche est celui de la direction du défilement de la feuille ; les lignes de crêpage lui sont perpendiculaires. On définit le sens travers comme formant un angle de plus ou moins 45° par rapport à la perpendiculaire au sens marche. Dans le cas particulier représenté, le motif présente un sens travers perpendiculaire au sens marche. Les picots ont une hauteur comprise entre 0,5 et 1,5 mm.The pins are identical on the two cylinders and are distributed in the same pattern with steps in the direction of travel, respec¬ tively in the cross direction, identical. The running direction is that of the direction of scrolling of the sheet; the creping lines are perpendicular to it. The transverse direction is defined as forming an angle of plus or minus 45 ° relative to the perpendicular to the running direction. In the particular case shown, the pattern has a transverse direction perpendicular to the running direction. The pins have a height of between 0.5 and 1.5 mm.
Comme on peut le voir sur la figure, l'intervalle de gaufrage entre les deux cylindres est égal à el entre le sommet des picots 13 du premier cylindre et le fond de la gravure entre les deux picots 14 adjacents du deuxième cylindre. Il est égal à e2 entre les flancs de deux picots 13 et 14 adjacents. Dans un souci de simplification on suppose que les picots sont symétriques par rapport à leur axe. Le jeu el est fonction de l'écartement que l'on a fixé entre les deux cylindres. La valeur du jeu e2 dépend, quant à elle, des paramètres géométriques des picots. Ainsi, pour un pas P du motif donné, il est fonction de l'angle au sommet α des picots ainsi que de leur largeur L au sommet. Dans la pratique l'angle α est compris entre 25 et 35° et la largeur au sommet est 0,1 et 1,2 mm.As can be seen in the figure, the embossing interval between the two cylinders is equal to el between the top of the pins 13 of the first cylinder and the bottom of the engraving between the two adjacent pins 14 of the second cylinder. It is equal to e2 between the flanks of two adjacent pins 13 and 14. For the sake of simplification, it is assumed that the pins are symmetrical with respect to their axis. The clearance el is a function of the spacing which has been fixed between the two cylinders. The value of the e2 clearance depends, for its part, on the geometric parameters of the pins. Thus, for a pitch P of the given pattern, it is a function of the angle at the top α of the pins as well as their width L at the top. In practice the angle α is between 25 and 35 ° and the width at the top is 0.1 and 1.2 mm.
Conformément à l'invention, on détermine el et e2 de façon que le rapport el/e2 soit inférieur ou égal à 1 et supérieur à 0,8. De préférence, la valeur el sera choisie au plus égale à l'épaisseur de la feuille à gaufrer. On assure ainsi un calandrage de la feuille au niveau du sommet des bossages obtenus, procurant une douceur améliorée au toucher.According to the invention, el and e2 are determined so that the ratio el / e2 is less than or equal to 1 and greater than 0.8. Preferably, the value el will be chosen at most equal to the thickness of the sheet to be embossed. This ensures calendering of the sheet at the top of the bosses obtained, providing improved softness to the touch.
On a représenté sur la figure 5 une installation de gaufrage pour la formation d'une feuille à deux plis. Cette installation en soi de type classique comprend deux cylindres 111, 112, en métal ou en un matériau équivalent, disposés en parallèle et entraînés par des moyens conventionnels dans le sens des flèches. Comme dans le mode de réalisation précédent, les cylindres 111 et 112 sont pourvus de picots 113, 114 s'étendant radialement vers l'extérieur et s'engrenant l'un dans l'autre. Un cylindre presseur 119, 120 à revêtement en caoutchouc, ou autre matériau élastomère, est associé à chacun des cylindres 111 et 112. Deux plis de papier crêpé 115, 115' sont engagés respectivement entre les cylindres 111 et 119, et 112 et 120 et sont pressés sur leur cylindre gaufreur respectif dont ils épousent le relief. Un dispositif d'encollage 121, également connu en soi, dépose une substance adhésive sur les sommets des zones en relief du pli 115, puis les deux plis sont entraînés dans l'intervalle de gaufrage entre les deux cylindres 111 et 112 où ils s'associent en une feuille. Cette feuille 115- 115' est ensuite transformée en produit fini tel que par exemple en essuie-tout ménager.FIG. 5 shows an embossing installation for the formation of a two-ply sheet. This installation per se of the conventional type comprises two cylinders 111, 112, made of metal or an equivalent material, arranged in parallel and driven by conventional means in the direction of the arrows. As in the previous embodiment, the cylinders 111 and 112 are provided with pins 113, 114 extending radially outward and meshing with one another. A pressure cylinder 119, 120 coated with rubber or other elastomeric material is associated with each of the cylinders 111 and 112. Two plies of crepe paper 115, 115 ′ are engaged respectively between the cylinders 111 and 119, and 112 and 120 and are pressed on their respective embossing cylinder, the relief of which they follow. A sizing device 121, also known per se, deposits an adhesive substance on the tops of the raised areas of the fold 115, then the two folds are entrained in the embossing interval between the two rolls 111 and 112 where they combine into one sheet. This sheet 115-115 'is then transformed into a finished product such as, for example, a household paper towel.
La figure 6 représente une vue agrandie d'une coupe réalisée selon un plan passant par l'axe des deux cylindres 111 et 112.FIG. 6 represents an enlarged view of a section made along a plane passing through the axis of the two cylinders 111 and 112.
Comme on le voit sur cette figure, les deux plis 115, 115' épousent sensiblement le contour des picots 113 et 114 respectivement.As seen in this figure, the two folds 115, 115 ' substantially match the outline of the pins 113 and 114 respectively.
Le jeu entre les deux cylindres est égal à el entre les sommets des picots et le fond de la gravure qui lui fait face. Il est égal à e2 au niveau des flancs. Conformément à l'invention, on détermine le jeu el de façon qu'il soit au plus égal à l'épaisseur des deux plis de façon à assurer d'une part la liaison par collage à ce niveau, d'autre part une action de calandrage. En outre, la géométrie des picots est déterminée de façon que le rapport el/e2 soit compris entre 0,8 et 1. On assure ainsi la formation d'une feuille, où la poche d'air est réduite.The clearance between the two cylinders is equal to el between the tops of the pins and the bottom of the engraving facing it. It is equal to e2 at the flanks. According to the invention, the clearance el is determined so that it is at most equal to the thickness of the two plies so as to ensure on the one hand the bonding at this level, on the other hand an action of calendering. In addition, the geometry of the pins is determined so that the ratio el / e2 is between 0.8 and 1. This ensures the formation of a sheet, where the air pocket is reduced.
Dans le sens machine on est amené à accepter un écart e2 plus important afin d'assurer un roulement satisfaisant des cylindres l'un sur l'autre. Ainsi, dans le sens machine, on a déterminé la valeur du rapport el/e2 de façon qu'elle soit comprise entre 0.2 et 1. En particulier, celle-ci doit être comprise entre 0.2 et 0,5.In the machine direction, we are led to accept a greater difference e2 in order to ensure satisfactory rolling of the cylinders one on the other. Thus, in the machine direction, the value of the ratio el / e2 has been determined so that it is between 0.2 and 1. In particular, this must be between 0.2 and 0.5.
On a représenté sur la figure 7 un mode de réalisation d'une feuille à 3 plis. L'installation est semblable à celle de la figure 5. Chaque élément commun a été désigné par la même référence. Elle comporte un encolleur supplémentaire 122 et une alimentation en papier 115".FIG. 7 shows an embodiment of a 3-ply sheet. The installation is similar to that of FIG. 5. Each common element has been designated by the same reference. It includes an additional sizing machine 122 and a 115 "paper feed.
Chacun des encolleurs 121, 122 dépose une substance adhésive sur au moins une partie des sommets des reliefs des plis 115 et 115". Ceux-ci sont appliqués contre les cylindres métalliques 111 et 112 au moyen des cylindres caoutchouc 119, 120. Les deux plis 115, 115' sont entraînés dans la direction des flèches jusque dans l'intervalle d'engrènement des deux cylindres 111 et 112. Un troisième pli 115" est entraîné entre les deux pli 115, 115' au moment de leur engagement dans ledit intervalle. Grâce à l'invention, avec el/e2 et el inférieur ou égal à la somme des 3 épaisseurs de pli, on assure la liaison des plis 115 avec 115" et 115" avec 115'. Each of the glueers 121, 122 deposits an adhesive substance on at least part of the tops of the reliefs of the plies 115 and 115 ". These are applied against the metal cylinders 111 and 112 by means of the rubber cylinders 119, 120. The two plies 115, 115 'are driven in the direction of the arrows as far as the engagement interval of the two cylinders 111 and 112. A third fold 115 "is driven between the two folds 115, 115' at the time of their engagement in said interval. Thanks to the invention, with el / e2 and el less than or equal to the sum of the 3 ply thicknesses, the plies 115 are connected with 115 "and 115" with 115 '.

Claims

REVENDICATIONS
1) Procédé de gaufrage d'une feuille de papier crêpé à au moins un pli selon lequel on engage celle-ci entre deux cylindres métalliques pourvus de protubérances, entraînés en rotation par des moyens connus en soi, et s'engrenant l'un dans l'autre avec un jeu el entre le sommet des protubérances d'un cylindre et la surface en vis-à-vis de l'autre cylindre, et un jeu e2 entre les flancs de deux protubérances adjacentes, caractérisé en ce que l'on détermine el et e2 dans le sens travers par rapport au sens de défilement de papier de façon que le rapport el/e2 soit compris entre 0,8 et 1.1) Method of embossing a sheet of crepe paper with at least one fold according to which it is engaged between two metal cylinders provided with protuberances, driven in rotation by means known per se, and meshing one in the other with a clearance el between the top of the protrusions of a cylinder and the surface facing the other cylinder, and a clearance e2 between the sides of two adjacent protrusions, characterized in that one determines el and e2 in the transverse direction relative to the direction of scrolling of paper so that the ratio el / e2 is between 0.8 and 1.
2) Procédé de gaufrage selon la revendication 1 caractérisé en ce que l'on détermine el et e2 dans le sens machine de défilement du papier de façon que le rapport el/e2 soit compris entre 0,2 et 1 et de préférence entre 0,2 et 0,5.2) Embossing method according to claim 1 characterized in that el and e2 are determined in the machine direction of travel of the paper so that the ratio el / e2 is between 0.2 and 1 and preferably between 0, 2 and 0.5.
3) Procédé de gaufrage d'une feuille à au moins deux plis, selon la revendication 1 ou 2, caractérisé en ce que l'on amène au moins l'un des deux plis à se conformer préalablement à la surface de l'un desdits cylindres en l'appliquant sur celui-ci au moyen d'un cylindre à revêtement caoutchouc.3) Method for embossing a sheet with at least two plies, according to claim 1 or 2, characterized in that at least one of the two plies is caused to conform beforehand to the surface of one of said cylinders by applying it to it by means of a rubber-coated cylinder.
4) Procédé, selon la revendication précédente, caractérisé en ce que 1'on applique les deux plis séparément sur les cylindres métalliques au moyen de cylindres à revêtement caoutchouc.4) Method according to the preceding claim, characterized in that the two plies are applied separately to the metal cylinders by means of cylinders with rubber coating.
5) Procédé, selon l'une des revendications 3 et 4, caractérisé en ce qu'on dépose une substance adhésive sur au moins une partie des zones en relief avant engagement des plis entre les deux cylindres métalliques.5) Method according to one of claims 3 and 4, characterized in that an adhesive substance is deposited on at least part of the raised areas before engagement of the folds between the two metal cylinders.
6) procédé de gaufrage d'une feuille de papier crêpé selon l'une des revendications précédentes, caractérisé en ce que le jeu el est compris entre 5/100 et 5/10 mm et correspond au plus à la somme des épaisseurs des plis constituant la feuille.6) embossing process for a sheet of crepe paper according to one of the preceding claims, characterized in that the clearance el is between 5/100 and 5/10 mm and corresponds at most to the sum of the thicknesses of the plies constituting leaf.
7) Procédé de gaufrage selon la revendication, précédente caractérisé en ce que le nombre de protubérances est supérieur à 12 au cm2. 8) Feuille gaufrée de papier absorbant crêpé, à au moins un pli, comportant sur chaque face des bossages alternant avec des zones en dépression, lesdites zones en dépression d'une face correspondant aux bossages de l'autre face, le gaufrage ayant été obtenu par engagement entre deux cylindres métalliques pourvus de protubérances et engrenant l'un dans l'autre, caractérisée en ce que la feuille présente une surface calandrée au niveau des sommets des bossages. 9) Feuille gaufrée de papier absorbant crêpé à deux plis, selon la revendication 8, comportant sur chaque face des bossages alternant avec des zones en dépression, lesdites zones en dépression d'une face correspondant aux bossages de l'autre face caractérisée en ce que les plis sont liés dans la zone du sommet d'au moins une partie des bossages d'une face et en ce que les deux plis ne forment pas de poches d'air entre eux. 7) Embossing method according to claim, previous characterized in that the number of protrusions is greater than 12 per cm 2 . 8) Embossed sheet of creped absorbent paper, with at least one fold, comprising on each face of the bosses alternating with zones in depression, said zones in depression of a face corresponding to the bosses of the other face, the embossing having been obtained by engagement between two metal cylinders provided with protrusions and meshing one in the other, characterized in that the sheet has a calendered surface at the tops of the bosses. 9) Embossed sheet of two-ply crepe absorbent paper, according to claim 8, comprising on each face of the bosses alternating with zones in depression, said zones in depression of a face corresponding to the bosses of the other face characterized in that the folds are linked in the region of the apex of at least part of the bosses on one side and in that the two folds do not form air pockets between them.
EP94904672A 1993-01-15 1994-01-13 Method for embossing a sheet with one or more plies Expired - Lifetime EP0679122B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9300366 1993-01-15
FR9300366A FR2700496B1 (en) 1993-01-15 1993-01-15 Method of embossing a sheet with one or more plies, sheet of embossed paper.
PCT/FR1994/000042 WO1994015776A1 (en) 1993-01-15 1994-01-13 Method for embossing a sheet with one or more plies, and embossed paper sheet thereby obtained

Publications (2)

Publication Number Publication Date
EP0679122A1 true EP0679122A1 (en) 1995-11-02
EP0679122B1 EP0679122B1 (en) 1998-08-19

Family

ID=9443074

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94904672A Expired - Lifetime EP0679122B1 (en) 1993-01-15 1994-01-13 Method for embossing a sheet with one or more plies

Country Status (7)

Country Link
US (1) US5686168A (en)
EP (1) EP0679122B1 (en)
AT (1) ATE169862T1 (en)
DE (1) DE69412585T2 (en)
ES (1) ES2121186T3 (en)
FR (1) FR2700496B1 (en)
WO (1) WO1994015776A1 (en)

Families Citing this family (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2746702B1 (en) * 1996-03-27 1998-05-29 James River PROCESS FOR PRODUCING AN ABSORBENT SHEET
DE19804736C1 (en) * 1998-02-06 1999-02-25 Windmoeller & Hoelscher Cylindrical welding unit for welding tubular film
BR9908459A (en) * 1998-03-02 2000-11-14 Perini Fabio Spa Method and device for the production of a material in embossed blanket and product made in this way
US6059003A (en) 1998-07-29 2000-05-09 Integrated Design Corporation Web heating and pressing apparatus
US6261666B1 (en) 1998-08-14 2001-07-17 Paper Converting Machine Co. Two-ply paper products with either nested or foot-to-foot embossments and method of making
US6109326A (en) * 1998-08-20 2000-08-29 Paper Converting Machine Company Embosser for producing two-ply paper products with either nested or foot-to-foot embossments
US6277466B1 (en) * 1998-11-23 2001-08-21 The Procter & Gamble Company Embossed multi ply cellulosic fibrous structure and process for producing the same
US6421052B1 (en) 1999-04-09 2002-07-16 The Procter & Gamble Company Method of seaming and expanding amorphous patterns
US6193918B1 (en) 1999-04-09 2001-02-27 The Procter & Gamble Company High speed embossing and adhesive printing process and apparatus
US6148496A (en) 1999-04-09 2000-11-21 The Procter & Gamble Company Method for making a seamless apertured metal belt
US6872342B2 (en) * 1999-04-09 2005-03-29 The Procter & Gamble Company Embossing and adhesive printing process
IT246987Y1 (en) * 1999-08-06 2002-05-02 C M G Costruzioni Meccaniche G TRANSFORMABLE MACHINE FOR SURFACE PAPER PROCESSING
CA2324786C (en) 1999-11-01 2014-02-25 Fort James Corporation Multi-ply absorbent paper product having impressed pattern
US7118796B2 (en) * 1999-11-01 2006-10-10 Fort James Corporation Multi-ply absorbent paper product having impressed pattern
US6602577B1 (en) 2000-10-03 2003-08-05 The Procter & Gamble Company Embossed cellulosic fibrous structure
DK1270196T3 (en) * 2001-06-29 2006-07-31 Georgia Pacific France Process for making an embossed sheet of cellulose wadding, the product obtained and stamping roll
US6846172B2 (en) * 2002-06-07 2005-01-25 The Procter & Gamble Company Embossing apparatus
US7967950B2 (en) * 2003-09-29 2011-06-28 The Procter & Gamble Company High bulk strong absorbent single-ply tissue-towel paper product
US7314663B2 (en) * 2003-09-29 2008-01-01 The Procter + Gamble Company Embossed multi-ply fibrous structure product and process for making same
ITFI20040032A1 (en) * 2004-02-13 2004-05-13 Perini Fabio Spa METHOD AND DEVICE EMBOSSER AND LAMINATOR FOR THE PRODUCTION OF MULTI-SPEED PRODUCTS AND RELATED PRODUCT
ITFI20040053A1 (en) * 2004-03-04 2004-06-04 Perini Fabio Spa MULTI-SPEED PRODUCT IN PAPER OR SIMILAR, METHOD FOR ITS PRODUCTION AND RELATED PLANT
ITFI20050032A1 (en) * 2005-03-01 2006-09-02 Perini Fabio Spa METHOD AND PROVISION FOR THE JOINT OF PAPER SAILS
US7785696B2 (en) * 2005-06-08 2010-08-31 The Procter & Gamble Company Embossed product including discrete and linear embossments
US7524404B2 (en) * 2005-06-08 2009-04-28 The Procter & Gamble Company Embossing process including discrete and linear embossing elements
US7435316B2 (en) * 2005-06-08 2008-10-14 The Procter & Gamble Company Embossing process including discrete and linear embossing elements
US7829177B2 (en) * 2005-06-08 2010-11-09 The Procter & Gamble Company Web materials having offset emboss patterns disposed thereon
US7597777B2 (en) * 2005-09-09 2009-10-06 The Procter & Gamble Company Process for high engagement embossing on substrate having non-uniform stretch characteristics
WO2007035914A1 (en) * 2005-09-21 2007-03-29 The Procter & Gamble Company Absorbent paper product having high definition embossments
ITFI20060245A1 (en) 2006-10-11 2008-04-12 Delicarta Spa A MATERIAL IN PAPER WITH HIGH DETERGENT CHARACTERISTICS AND METHOD FOR ITS PRODUCTION
ITFI20070048A1 (en) * 2007-02-27 2008-08-28 Perini Fabio Spa MULTI-FUNCTION EMBOSS GROUP
US20100028621A1 (en) * 2008-08-04 2010-02-04 Thomas Timothy Byrne Embossed fibrous structures and methods for making same
US20100030174A1 (en) * 2008-08-04 2010-02-04 Buschur Patrick J Multi-ply fibrous structures and processes for making same
US20100297378A1 (en) * 2009-05-19 2010-11-25 Andre Mellin Patterned fibrous structures and methods for making same
US8328984B2 (en) 2009-05-19 2012-12-11 The Procter & Gamble Company Web substrate having optimized emboss design
US9243368B2 (en) * 2009-05-19 2016-01-26 The Procter & Gamble Company Embossed fibrous structures and methods for making same
US8753737B2 (en) * 2009-05-19 2014-06-17 The Procter & Gamble Company Multi-ply fibrous structures and methods for making same
US20100297395A1 (en) * 2009-05-19 2010-11-25 Andre Mellin Fibrous structures comprising design elements and methods for making same
US8282775B2 (en) 2009-05-19 2012-10-09 The Procter & Gamble Company Web substrate having optimized emboss area
ITFI20110135A1 (en) * 2011-07-07 2013-01-08 Futura Spa DEVICE AND METHOD FOR THE MANUFACTURING OF MATERIAL CARATCEO NASTRIFORME.
WO2014004939A1 (en) 2012-06-29 2014-01-03 The Procter & Gamble Company Textured fibrous webs, apparatus and methods for forming textured fibrous webs
HUE025413T2 (en) * 2012-07-10 2016-02-29 Sca Tissue France A cloth-like textured nonwoven fabric comprising papermaking fibers, calendering roller and method of manufacturing the same
NL2010296C2 (en) * 2013-02-13 2014-08-14 Unga B V Stackable cards.
US8858213B2 (en) 2013-02-22 2014-10-14 The Procter & Gamble Company Equipment and processes for the application of atomized fluid to a web substrate
US10060062B2 (en) 2013-02-22 2018-08-28 The Procter & Gamble Company Equipment and processes for the application of atomized fluid to a web substrate
ES2578830B1 (en) * 2015-01-29 2017-08-10 L.C. Paper 1881, S. A. PROCEDURE FOR OBTAINING SUNFLOWED PAPER PAPER AND SUNFLOWING UNIT OF A SINGLE LAYER CREPED PAPER SHEET

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1245280A (en) * 1967-11-09 1971-09-08 Kimberly Clark Co Two-sided cellulose towel and method of making
US3708366A (en) * 1970-11-25 1973-01-02 Kimberly Clark Co Method of producing absorbent paper toweling material
IT1063742B (en) * 1976-01-29 1985-02-11 F I L C A S S A S Di Cristofor IMPROVEMENT OF PROCEDURES FOR DEVICES FOR THE PRODUCTION OF EMBOSSED PAPER FOR THE FORMATION OF LAYERED BEARINGS AND PAPER BEARINGS PRODUCED ACCORDING TO FOR FEEDING
DE2611325C3 (en) * 1976-03-17 1978-09-07 Bhs-Bayerische Berg-, Huetten- Und Salzwerke Ag, 8000 Muenchen Single sided corrugator
US4325768A (en) * 1979-03-19 1982-04-20 American Can Company Method of manufacturing fibrous sheet structure
DE3804611A1 (en) * 1988-02-13 1989-08-24 Casaretto Robert Kg ROLLER ARRANGEMENT FOR STRENGTHENING FLEECE OR THE LIKE.
CA2060567C (en) * 1991-02-04 1997-06-10 Galyn Arlyn Schulz Apparatus for embossing a fibrous web
CA2052746A1 (en) * 1991-02-22 1992-08-23 Jerome Steven Veith Method for embossing webs
US5294475A (en) * 1992-06-12 1994-03-15 The Procter & Gamble Company Dual ply cellulosic fibrous structure laminate

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9415776A1 *

Also Published As

Publication number Publication date
WO1994015776A1 (en) 1994-07-21
US5686168A (en) 1997-11-11
ES2121186T3 (en) 1998-11-16
DE69412585D1 (en) 1998-09-24
EP0679122B1 (en) 1998-08-19
FR2700496B1 (en) 1995-02-17
ATE169862T1 (en) 1998-09-15
FR2700496A1 (en) 1994-07-22
DE69412585T2 (en) 1999-01-07

Similar Documents

Publication Publication Date Title
EP0679122B1 (en) Method for embossing a sheet with one or more plies
EP0765215B1 (en) Absorbent paper multilayered sheet and method of manufacture
EP0793751B1 (en) Absorbent multilayer sheet and method for making same
CA2458952C (en) Absorbent paper product with improved embossing
EP1209289B1 (en) Creped absorbent paper sheet, creping cylinder and process for making such a sheet
EP1047546B1 (en) Sheet of embossed absorbent paper, and a method and device for producing same
EP1325982B1 (en) Embossed paper sheet
WO1997027365A1 (en) Laminated sheet with multiple embossed patterns
EP1670991B1 (en) Sheet of absorbent paper with improved relief
EP1270196B1 (en) Method of making embossed tissue paper and embossing cylinder
WO1996018771A1 (en) Embossed absorbent paper having combined patterns
EP0572503A1 (en) Paper sheets having several distinct layers with markings, process and device for producing them.
EP0570579B1 (en) Complex sheets of absorbent paper
EP1159487B1 (en) Absorbent paper product comprising two or three plies
EP1073797A1 (en) Embossed absorbent paper sheet
EP1285133A2 (en) Absorbent paper product with asymmetric structure
EP0828602B1 (en) Method for making an absorbent structure
CA2202166C (en) Embossed absorbent paper having combined patterns
CA2223015C (en) Method for making an absorbent structure

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: 19950816

AK Designated contracting states

Kind code of ref document: A1

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

17Q First examination report despatched

Effective date: 19951124

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

Owner name: JAMES RIVER

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

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

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

Owner name: FORT JAMES FRANCE

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

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

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

Ref country code: GR

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

Effective date: 19980819

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: 19980819

REF Corresponds to:

Ref document number: 169862

Country of ref document: AT

Date of ref document: 19980915

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69412585

Country of ref document: DE

Date of ref document: 19980924

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19981005

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2121186

Country of ref document: ES

Kind code of ref document: T3

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: 19981119

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: 19981119

REG Reference to a national code

Ref country code: PT

Ref legal event code: SC4A

Free format text: AVAILABILITY OF NATIONAL TRANSLATION

Effective date: 19980819

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

Ref country code: LI

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

Effective date: 19990131

Ref country code: CH

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

Effective date: 19990131

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

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

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

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

Ref country code: NL

Payment date: 20031224

Year of fee payment: 11

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

Ref country code: PT

Payment date: 20031231

Year of fee payment: 11

Ref country code: GB

Payment date: 20031231

Year of fee payment: 11

Ref country code: BE

Payment date: 20031231

Year of fee payment: 11

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

Ref country code: IE

Payment date: 20040105

Year of fee payment: 11

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

Ref country code: ES

Payment date: 20040121

Year of fee payment: 11

Ref country code: DE

Payment date: 20040121

Year of fee payment: 11

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

Ref country code: FR

Payment date: 20040128

Year of fee payment: 11

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;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: 20050113

Ref country code: IE

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

Effective date: 20050113

Ref country code: GB

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

Effective date: 20050113

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

Ref country code: ES

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

Effective date: 20050114

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

Ref country code: BE

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

Effective date: 20050131

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

Ref country code: PT

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

Effective date: 20050713

BERE Be: lapsed

Owner name: *FORT JAMES FRANCE

Effective date: 20050131

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

Ref country code: NL

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

Effective date: 20050801

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

Ref country code: DE

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

Effective date: 20050802

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

Effective date: 20050113

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: 20050930

REG Reference to a national code

Ref country code: PT

Ref legal event code: MM4A

Effective date: 20050713

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

Effective date: 20050801

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20050114

BERE Be: lapsed

Owner name: *FORT JAMES FRANCE

Effective date: 20050131