EP1970193B1 - Matériau en feuille gaufré, unité de gaufrage et procédé de fabrication - Google Patents

Matériau en feuille gaufré, unité de gaufrage et procédé de fabrication Download PDF

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Publication number
EP1970193B1
EP1970193B1 EP08425142.0A EP08425142A EP1970193B1 EP 1970193 B1 EP1970193 B1 EP 1970193B1 EP 08425142 A EP08425142 A EP 08425142A EP 1970193 B1 EP1970193 B1 EP 1970193B1
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EP
European Patent Office
Prior art keywords
embossing
patterns
sequence
roller
ply
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.)
Not-in-force
Application number
EP08425142.0A
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German (de)
English (en)
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EP1970193A3 (fr
EP1970193A2 (fr
Inventor
Giancarlo Cicalini
Mauro Gelli
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Fabio Perini SpA
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Fabio Perini SpA
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Publication date
Application filed by Fabio Perini SpA filed Critical Fabio Perini SpA
Publication of EP1970193A2 publication Critical patent/EP1970193A2/fr
Publication of EP1970193A3 publication Critical patent/EP1970193A3/fr
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Publication of EP1970193B1 publication Critical patent/EP1970193B1/fr
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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
    • B31F2201/0733—Pattern
    • 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
    • B31F2201/0738—Cross sectional profile of the embossments
    • 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
    • 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
    • B31F2201/0771—Other aspects of the embossing operations
    • B31F2201/0774—Multiple successive embossing operations

Definitions

  • the present invention relates to an embossed product, in particular, although not exclusively, to a multi-ply embossed product, i.e. a product composed of more plies joined to one another.
  • a paper web product such as specifically a tissue paper product, for example for the production of rolls of toilet paper, kitchen towels and similar products.
  • the invention also relates to an embossing unit for a web material, wherein two or more plies are embossed separately and joined to one another, for example by means of glue.
  • the invention relates to a method for embossing a web material, preferably, although not exclusively, a multi-ply material.
  • Embossing is one of the operations that are typically performed on the tissue paper plies or sheets, for the production of paper items for cleaning and personal hygiene, or also for commercial or industrial use, such as for example toilet paper, kitchen towel, napkins, handkerchiefs and similar products.
  • the embossing operation is performed with the dual aim of improving the aesthetic characteristics and of increasing the functional characteristics, such as in particular softness, smoothness, absorption capacity or thickness of the finished product.
  • a tissue paper material such as kitchen towel and toilet paper
  • a tissue paper material is composed of two or more plies of paper, which are embossed separately and subsequently joined to each other by applying glue and laminating the plies between counter-rotating rollers defining a lamination nip.
  • the embossing is typically performed by feeding each ply between an embossing roller, provided with protuberances, and a pressure roller with an external surface coated in an elastically yielding material, typically rubber.
  • an embossing roller provided with protuberances
  • a pressure roller with an external surface coated in an elastically yielding material, typically rubber.
  • the embossing roller being typically produced in steel.
  • the embossing is performed between two rollers made of steel or other hard material, the first provided with protuberances and the second with corresponding hollows.
  • the protuberances of the embossing roller produce corresponding protuberances or projections in the paper ply.
  • the protuberances formed in the two outermost plies are facing the inside of the finished product.
  • the two plies of the paper web material are joined together taking the protuberances of one ply to correspond with the protuberances of the other ply, having applied previously a glue on the protuberances of one of the two plies, or at least on a part thereof.
  • two embossing rollers which separately emboss two paper plies by means of corresponding pressure rollers, form between themselves a lamination nip, through which the two embossed plies pass, before being detached from the rollers.
  • the protuberances of a roller coincide with the protuberances of the other roller, and the reciprocal distance between the rollers can be such as to cause a localized compression of the plies in correspondence of these protuberances.
  • US-A-3,414,459 describes a tip-to-tip embossing device for obtaining a product of this type.
  • the tip-to-tip embossing technique has been perfected and improved, in order to solve particular problems, which arise with this method.
  • US-A-5,096,527 describes a technique for reducing vibrations and wears in the tip-to-tip embossing units.
  • US-A-6,113,723 describes a distribution of protuberances whose object is to increase the strength of gluing by means of a particular arrangement of the protuberances.
  • US-A-5,736,223 describes a method for producing a paper sheet article comprising three layers or plies of tissue paper.
  • US-A-5,173,351 , US-A-6,032,712 , US-A-6,245,414 , and US-A-6,053,232 describe embossing-laminating units, which, with particular expedients, avoid a concentrated wear of the protuberances even when the protuberances do not coincide completely, but rather they produce a zone-to-zone correspondence, between some of the protuberances of a roller with some of the protuberances of the other roller.
  • US-A-3,961,119 describes a tip-to-tip embossing unit, wherein two embossing rollers cooperating with each other are provided with helical bosses. The bosses of an embossing roller present projections, which mesh with cavities obtained in the helical bosses of the opposite embossing roller.
  • the two plies are embossed separately, each between an embossing roller and a counter-roller or pressure roller.
  • the two plies are subsequently glued in such a way that the protuberances of a ply are nested between the protuberances of the other ply.
  • US-A-6,578,617 and US-A-6,470,945 describe embossing units which can perform embossing according to both the technologies described above. To switch from a tip-to-tip embossing to a nested embossing, it is possible to modify the angular phase and/or the axial position of the two embossing rollers.
  • US-A-6,261,666 describes a similar device for performing alternatively a tip-to-tip or a nested embossing. Another similar device is described in US-A-6,109,326 .
  • embossing was performed according to very simple geometrical patterns, with uniform distributions of protuberances with a frusto-conical or frusto-pyramidal shape. This embossing substantially had a technical function, being suitable to provide a product with adequate thickness and with sufficient softness as well as absorption capacity.
  • embossing has to serve a double purpose, both techno-functional and aesthetic. Therefore, embossing patterns and embossing units were developed, which allow to obtain a product aesthetically pleasing and, at the same time, suitable to meet the more and more demanding aesthetic requirements and commercial needs required from these product.
  • the embossing no longer is obtained only through elementary geometrical patterns, but it requires the combination of more or less close embossing (sometimes of micro-embossing) and decorative patterns embossed and possibly printed. Examples of complex embossing are described in US-A-6,136,413 , US-A-5,846,636 , and US-A-6,106,928 .
  • US-A-6,755,928 and US-A-6,681,826 describe a new embossing technique which allows to obtain patterns with increased aesthetic prestige and easily interchangeable.
  • one or more embossing rollers are provided, on the surface of which embossing motifs are obtained, defined by protuberances of different shape, in order to satisfy the aesthetic and techno-functional requirements described above.
  • the surface of the embossing roller or of each embossing roller is provided with a repetitive embossing pattern.
  • the product thus obtained is therefore composed of a continuous web, on which a single pattern is repeated indefinitely, or at the most a very limited number of patterns different from each other, which cover globally a length of the web material equal to the circumferential extension of the embossing roller.
  • each pattern decorates a single sheet into which the web material is subdivided. If the web material is manufactured in logs constituted by a continuous strip subdivided through tear-off and perforation lines (which divide the web material into single sheets that can be torn off separately) each sheet is decorated with one of the patterns of the series of patterns provided along the circumferential extension of the roller. Therefore, in the finished product one can find for example 2-6 patterns different from each other, which form a cyclically repeating sequence.
  • One object of the present invention is to provide an embossed web material, which presents greater variability of embossing patterns, so that in a single pack one can find a plurality of sheets with patterns different from each other in a larger quantity than what can be obtained with the traditional techniques, i.e. in particular a number of patterns different from each other greater than the number of patterns obtained on one circumferential extension of the embossing roller or embossing rollers with which the product was obtained.
  • a further object of the present invention is to provide an embossing unit, which allows to obtain a multi-ply embossed web product characterized by a great variability of the embossing patterns realized on the single sheets forming it.
  • the invention provides a web product according to claim 1.
  • a first embodiment of the invention provides a web product comprising at least a ply, decorated by embossing, in which along the extension of said web product variable combinations of at least two sequences of embossing motifs come after each other.
  • embossed motifs are obtained by combining two series or successions of patterns, if said two sequences present different number of pattern and more in particular the two sequences are defined by two numbers of patterns different from each other and prime to each other, the total number of decorative combinations is equal to the product of the number of patterns in each sequence. For example, if the two sequences contain respectively N and M patterns, where N and M are numbers prime to each other, the combined use of these sequences will result in a succession of NxM different combinations and therefore a great variation of the patterns in the finished product.
  • the product can be subdivided into sheets, each sheet presenting a combination of patterns of said two sequences.
  • the product can be a pack of napkins, handkerchiefs or other single products, preferably folded and stacked.
  • the product is formed by sheets forming a continuous web and they are subdivided from each other by perforation lines, along which said sheets can be detached one from the other.
  • the continuous web material thus obtained can be for example wound in rolls, such as rolls of kitchen towel, toilet paper or similar.
  • the product has a single ply, or a plurality of plies embossed simultaneously in a single passage, for example by means of a pair of embossing rollers and corresponding pressure rollers positioned in sequence along the feed path of the web material.
  • the product comprises at least two plies bonded to each other, separately embossed and subsequently joined, for example by gluing.
  • one embodiment of the invention provides for a first ply be embossed with the patterns of a first sequence, and for the second ply with the patterns of a second sequence.
  • each ply can in turn be formed by more layers bonded to each other and that, in addition to these two plies, further plies can be provided, separately embossed or even smooth, interposed between embossed plies, or other alternative combinations of embossed and/or smooth plies.
  • the plies can be coupled by gluing.
  • gluing is performed by means of two different glues, for example of different color, applied one on the one and one on the other of the two embossing patterns obtained on the two plies of the web material.
  • glues for example of different color
  • each of the two sequences of embossing patterns or motifs has a length equal to a multiple of a dimension of the sheets into which the web material is subdivided.
  • the two lengths differ from each other by a multiple of said dimension, preferably by a multiple equal to 1 of this length.
  • the product is configured so that:
  • the first sequence and the second sequence of patterns are applied on the web material in a repetitive manner.
  • the patterns of the two or more sequences of patterns can be completely different from each other. However, this is not necessary, as the desired effect of a great variability of the overall motifs formed on the web material is obtained even if a part of the pattern of the two sequences are equal, even arranged according the same order, or according a different order in the two sequences.
  • the pattern are arranged so as not to overlap each other, but rather to occupy adjacent areas of the same sheet of the same portion of web material. It is also possible that the two patterns - one for each sequence - involving or occupying the same portion of material, for example the same sheet of a roll, are at least partially interspersed with each other.
  • the invention relates to an embossing unit according to claim 23.
  • He embossing unit comprises a first embossing roller and a second embossing roller, provided with protuberances defining embossing patterns.
  • the embossing unit provides that:
  • the two embossing rollers have diameters different from each other, which differ by such a value that the length of the circumference of the two rolls differs by a multiple (possibly equal to 1) of a base length which constitutes the pitch of the patterns on the finished product.
  • the base length will be substantially equal to the length of the single sheet measured along the longitudinal direction of the web material.
  • first embossing roller and the second embossing roller each cooperate with a respective first pressure roller.
  • Pressure roller is intended as a roller for example coated with a yielding material and provided with a smooth external surface, inside which penetrate the protuberances of the corresponding embossing roller.
  • pressure roller is also intended generally as a roller, whose cylindrical surface is in hard material, for example steel, and on this surface an engraving is provided, in negative corresponding to the embossing protuberances of the embossing roller.
  • the web material can be embossed by means of the male-female co-action of the cavities and protuberances of the two rollers cooperating with each other.
  • the embossing unit has a single path for a ply or set of plies forming the web material. Along this path the two embossing rollers can be arranged in sequence.
  • the embossing unit is provided with two paths for at least two plies, a first path developing about the first embossing roller and a second path developing about the second embossing roller.
  • more embossing rollers in succession can be provided, in order to obtain a combination of patterns by means of three or more sequences of embossing patterns, at least two of which present a different number of patterns in order to obtain the combinatory effect of multiplication of the final patterns.
  • one or more glue dispensers can provided, in order to apply one or more glues on the plies.
  • the glues are different from each other in color.
  • the invention also relates to a web material converting line comprising an embossing unit as defined above, combined with one or more further converting machines, for example: a perforator unit; a rewinding machine; a gluer for gluing the ends formed by winding the web material; a severing machine.
  • the invention also relates to an embossing method for embossing a web material according to claim 40.
  • the method provides for the web material to be embossed by means of at least a first sequence of embossing patterns and a second sequence of embossing patterns, said two sequences differing in length, so that on said web material a succession of variable combinations of the patterns of said first and second sequence is obtained.
  • Figures 1, 1A and 1B schematically show an embossing or embossing-laminating unit to perform embossing and lamination of two plies of web material, for example tissue paper.
  • the embossing unit indicated in its entirety with number 1, comprises a first path for a first ply V1 and a second path for a second ply V2.
  • Each ply V1, V2, in turn, can be composed of a single layer or of more layers. Further paths for a third or more ply would also be possible, for example to be inserted between the ply V1 and the ply V2.
  • a first pressure roller 3 is arranged, cooperating with a first embossing roller 5.
  • the pressure roller 3 is coated in an elastically yielding material, for example rubber or similar.
  • the embossing roller 5 is provided, on its cylindrical surface, with protuberances 5P defining an embossing pattern, whose characteristics will be better described hereunder.
  • the ply V1 is embossed, i.e.
  • a glue dispenser 7 is arranged; this dispenser applies by means of a roller 7A a glue on the embossed protuberances of the ply V1, in correspondence of all or some of the embossing protuberances 5P of the embossing roller 5.
  • the glue applied by the dispenser 7 is colored. In a different embodiment, the glue applied by the dispenser 7 can be neutral, i.e. colorless.
  • the embossing unit 1 comprises a second pressure roller 9, coated in rubber or other elastically yielding material, indicated with 9A.
  • the pressure roller 9 cooperates with a second embossing roller 11 the surface of which is provided with embossing protuberances 11P, which define an embossing pattern described in more detail hereunder.
  • a color dispenser 13 is arranged, with a color applicator roller 13A similar to the dispenser 7 with the dispensing roller 7A.
  • the ply V2 is embossed in the embossing nip between the rollers 9 and 11 and on it an embossing pattern is impressed, corresponding to the pattern defined by the protuberances 11 P.
  • the dispenser 13 applies a color in a manner similar to what occurs with the glue applied by the dispenser 7 with respect to the ply V1 embossed between the rollers 3 and 5.
  • the two embossing rollers 5 and 11 are arranged in such a way as not to touch each other in the nip 17 defined between them. Therefore, in this case the embossed ply V2 is detached from the second embossing roller 11 and placed on the embossed ply V1. Both the plies V1, V2 are thus driven about the first embossing roller 5 and fed through a lamination nip 19 between the first embossing roller 5 and a laminating roller 15.
  • the laminating roller 15 can be coated in an elastically yielding material.
  • the two plies V1 and V2 are joined through the effect of the pressure between the rollers 5 and 15.
  • Figure 2 schematically shows a greatly enlarged transverse section of a portion of the web material N formed by the plies V1 and V2 embossed and joined by gluing.
  • P1 schematically indicates by way of example protuberances of the embossing pattern on the ply V1
  • P2 schematically indicates protuberances of the embossing pattern on the ply V2.
  • C1 indicates the glue applied by the glue dispenser 7 on the ply V1
  • C2 indicates the color applied by the dispenser 13 on the ply V2.
  • the two plies are pressed by the laminating roller 15 against corresponding protuberances 5P of the embossing roller 5, whilst in correspondence of the color C2 there can be an effect of light compression on the ply V2 exerted by the laminating roller 15.
  • the web material N formed by the combination of the plies V1+V2 will be wound in a roll with the ply V1 outside, so as to present a better look both thanks to the integrity of the protuberances P1 and to the fact that the colored glue is perfectly visible, whilst the color applied on the ply V2 will be less bright, as it will have to show through the ply V1 lying over it.
  • lamination may take place between the embossing rollers 5, 11, in the nip 17, with an adequate arrangement of the embossing patterns defined by the protuberances 5P and 11P.
  • two glues C1, C2 can be used instead of a glue C1 and a color C2.
  • the two glues C1, C2 may be both colored, preferably with different colors, or one colored and the other neutral.
  • the roller 15 can be omitted.
  • the embossing rollers 5 and 11 have diameters and thus circumferential extensions different from each other.
  • the second embossing roller 11 has a diameter greater than the diameter of the first embossing roller 5.
  • each of the two embossing rollers 5 and 11 have a circumferential extension, i.e. a length of the circumference, equal to a multiple of a base length L.
  • This length L substantially corresponds to the length of each sheet into which the web material N is subdivided.
  • the web material N can be wound in a log after having been subdivided into said sheets with length L through transverse perforation lines.
  • FIG. 6 shows by way of examples a roll R of wound web material N, subdivided into sheets F through transverse perforation lines T.
  • each roll R can be obtained by cutting transversely a log with greater axial length, obtained by winding a web material N of great width.
  • the embossing unit 1 is placed inside a converting line, wherein downstream of the embossing unit 1 a perforator 21 is arranged, which subdivides the web material N formed by the plies V1, V2 (joined together) into single sheets F through the perforation lines T.
  • the perforated web material is then fed to a rewinding machine schematically indicated with 23, of a known type and thus not described in detail, which produces single logs Ls of wound web material N, with or without winding tubular cores.
  • the logs Ls have an axial length equal to a multiple of the axial length of the finished roll R, and usually present head and tail trimmings.
  • the trimming are eliminated and the logs Ls are subdivided in single rolls R in a log saw 25 downstream of a gluing unit 24, which glues the free end of each log Ls, so that it will not be unwound during the subsequent transformation operations, including the phases of packaging the rolls R.
  • the machines 24, 25 are known per se, and they will not be described in greater detail.
  • Figures 3 and 4 show an embodiment of the embossing pattern on the two embossing rollers 5 and 11.
  • Figures 3 and 4 show respectively the cylindrical surfaces of the roller 5 and of the roller 11 developed on a plane.
  • A5 indicates the width of the surface of the roller 5 on which the embossing pattern formed by the protuberances 5P is obtained.
  • This width A5 substantially corresponds to the axial width of the cylindrical surface.
  • the surface is subdivided in two lateral bands BL and two central bands BC.
  • the central bands BC have a width (indicated with BC) greater than the lateral bands BL and substantially equal to the width of the web material wound on the roll R obtained by the subsequent processing of the web material.
  • the length of the planar open surface of the embossing roller 5 is equal to 5xL, i.e. the circumferential extension of the roller 5 is equal to five times the base length L. In this way the cylindrical surface of the roller 5 is subdivided into ten central panels R5, each of which has dimensions substantially corresponding to the dimension of a single sheet F ( figure 6 ).
  • embossing patterns are provided, formed by protuberances 5P.
  • the decorative motifs are indicated with G1-G5.
  • the embossing patterns are represented by sea motifs (sea shells and starfishes), but it should be understood that this is only a possible example of embodiment, as the embossing patterns or motifs can be of any type.
  • the sequence of the pattern in the left band BC may be the same as the sequence in the right band.
  • sequences of patterns may be obtained, which are completely different from each other.
  • the embossing motif obtained on the roller 5 also presents a continuous decoration DC along each of the two central bands BC.
  • the continuous decoration DC is formed by stylized waves, merely by way of example. Wave motifs can be found also in the lateral bands BL.
  • the arrangement of the continuous decorations DC and of the sequences of decorations G1-G5 different in the two bands BC reduces vibrations which are produced n the embossing unit 1 through the action of the contact between roller 5 and roller 3, thus making more uniform the reciprocal contact between the above mentioned rollers, and reduces differences in wear on the various areas of the pressure roller 5.
  • straight lines T1, T2, and T3 are indicated, which represent the lines along which the web material, embossed with the embossing roller 5, is cut by the log saw with which the logs of material N are divided into rolls R.
  • the strips of embossed web material in correspondence of the lateral bands BL are eliminated as head and tail trimmings, whilst the strips of web material embossed by the bands BC will constitute two finished rolls R.
  • T indicates the positions in which on the web material N the tear-off and perforation lines T ( figure 6 ) will be obtained, through which the material N is subdivided into single sheets F.
  • the embossing roller 5 may have a much greater axial length A5 and thus a much greater series of central bands BC, for embossing plies of web material which, once wound, will form logs of axial length equal to many multiples of the axial length of the finished roll R. Each log will be then subdivided into two head and tail trimmings, respectively, and into a high number of usable rolls R. Typically, the logs currently produced by the modern rewinding machines can reach an axial length of 5 meters, while the rolls R present axial lengths in the order of 10-30 cm.
  • Figure 4 shows the planar development of the cylindrical surface of the second embossing roller 11.
  • the width, corresponding to the axial length of the roller 11, is indicated with A11 and corresponds to the dimension A5 of the embossing roller 5.
  • the length of the planar development of the embossing roller 11, i.e. its circumferential extension, is equal to 6xL, i.e. to six times the base length.
  • T1, T2, T3 indicate again the positions of the cutting lines with which the web material will be subdivided into two rolls, constituted by the winding of the central bands BC of the two plies V1, V2.
  • T indicates the positions of the perforation lines.
  • G6-G11 indicate decorative patterns obtained in the central bands BC of the roller 5, arranged, also in this case, according different sequences in the two bands BC.
  • DC indicates the continuous decoration.
  • the surface of the embossing roller 11 is thus subdivided into a plurality of panels R11 with dimensions which are equal to the dimensions of the panels R5 and therefore with a dimension L equal to the length of the single sheet F of the finished roll R and with a dimension BC equal to the width of the web material N which constitutes the finished roll R.
  • roller 11 presents twelve panels.
  • rollers 5 and 11 with the embossing decorative motifs described above are mounted on the embossing device or unit 1, they produce on the two plies V1 and V2 embossing motifs according to the decorations G1-G5 on the ply V1 and according to the decorations G6-G11 on the ply V2.
  • Figures 3 and 4 thus also show portions of the plies V1 and V2 respectively, after they have been embossed in the nips between the pressure and embossing rollers.
  • a decoration is obtained, which is formed by the combination of the decorations G1-G5 and G6-G11.
  • N sequences of sheets F will be obtained, characterized by thirty different repeating combinations.
  • an embossing roller has a circumferential extension equal to M1 times the base dimension L and the other embossing roller has a circumferential extension equal to M2 times the base dimension, with M1 and M2 prime with each other, the finished product obtained by bonding together the plies V1 and V2 embossed separately by the rollers 5 and 11 will have a sequence comprising M1xM2 different combinations of decorations.
  • Figures 5A, 5B show the web material N obtained by joining the plies V1 and V2 embossed with rollers 5 and 11 on whose surfaces there are the motifs of figures 3 and 4 .
  • Figures 5A and 5B show the different sheets obtained in the central part of the rollers 5 and 11 omitting the decorations related to the lateral bands BL.
  • the first two adjacent sheets F1 are illustrated, the left one of which is obtained by the decoration G1 and the right stylized wave of the roller 5, plus the decoration G6 and the left wave of the roller 11.
  • the second two adjacent sheets F2 are shown, the left one of which is obtained by the decoration G2 of the roller 5 and by the decoration G7 of the roller 11 combined with the respective stylized waves on both sides.
  • the sheets F3 are shown again the pair of sheets F16, and above it the subsequent pair of sheets F17. The sequence will continue until the upper end, in which F30 shows the last combination of patterns, and then the sequence repeat indefinitely.
  • the embossing patterns obtained on the two rollers 5 and 11 are partially equal (the patterns G1-G5 correspond to the patterns G8-G11, G7), apart from the fact that the same patterns have in the panels of the roller 5 a different position with respect to the corresponding patterns of the roller 11, so that in the finished product N no overlapping of patterns occurs.
  • the patterns G1-G5 could be all different with respect to the patterns G6-G11.
  • the patterns G1-G5 of the left band BC are equal (even if arranged in a different manner) with respect to the patterns of the right band BC.
  • the same is true for the patterns G6-G11 of the roller 11.
  • the various central bands BC, into which each embossing roller 5, 11 is subdivided could be characterized by pattern different from band to band, in which case a greater variability of the final patterns of the rolls is obtained.
  • Figures 8 and 9 show an embodiment, wherein the embossing unit is designed for producing a web material in a single ply, or even constituted by more plies but embossed all together.
  • the embossing unit indicated in its entirety with 100, comprises a first pressure roller 103, which can present a cylindrical surface coated in an elastically yielding layer 103A, such as rubber or similar.
  • the pressure roller 103 forms, with a first embossing roller 105, an embossing nip 104, through which the web material N to be embossed travels.
  • the first embossing roller has a plurality of protuberances 105P (see enlargement in figure 8A ), which define a first embossing pattern.
  • a second pressure roller 107 is arranged, which cooperates with a second embossing roller 109, provided with embossing protuberances 109P ( figure 8B ).
  • the cylindrical surfaces of the embossing rollers 105 and 109 can be configured as shown in figures 3 and 4 , thus presenting two diameters different from each other.
  • the embossing patterns obtained by the two rollers 105 and 109 are advantageously offset, as shown for the embossing motifs G1-G11 of figures 3 and 4 .
  • each panel R, into which the second embossing roller 109 is subdivided, will decorate a portion of the web material in which it is not yet embossed by the corresponding panel R of the roller 105.
  • the rollers 105 and 109 can be sufficiently close as to avoid the web material from excessively sliding, in order to assure a correct positioning of the embossing patterns produced by the two rollers on the same area of the material N, i.e. on the portion of material N destined to form a same sheet F.
  • the pressure roller 107 cooperating with the second embossing roller 109 and defining with this latter a second embossing nip 108 can present a hollow area 107A, corresponding to the position in which on the material N is located the pattern embossed by the embossing roller 105. This avoids compression of the embossing pattern formed by the first pair of rollers 103, 105.
  • the continuous patterns or decorations DC can be omitted.
  • Figure 9 shows a schematic greatly enlarged section of a web material N embossed with the embossing unit 100 of figures 8, 8A, and 8B .
  • P105 and P109 indicate the embossing protuberances obtained with the rollers 105 and 109 respectively.
  • Figure 10 shows a modified embodiment of the embossing unit of figure 8 .
  • the same numbers indicate the same or equivalent parts to those of the embossing unit of figure 8 .
  • a glue dispenser 110 is located around the embossing roller 109 downstream of the pressure roller 107.
  • the glue dispenser 110 applies a glue on the protuberances produced by the embossing roller 109 in cooperation with the pressure roller 107.
  • Downstream of the glue dispenser 110 a laminating or roller 111 is provided.
  • a second smooth ply V2 is inserted.
  • the ply V2 can be previously embossed, for example with a background micro-embossing.
  • the product obtained is schematically shown in figure 11 , where C indicates the glue applied on the protuberances P109 of the ply V1.
  • Figure 12 shows a modified embodiment of the embossing unit of figure 11 .
  • the same numbers indicate parts identical or equivalent to those of the embossing unit of figure 11 .
  • the embossing rollers 105, 109 are arranged so that all the protuberances P105 and P109 produced thereby on the ply V1 are oriented in the same direction, i.e. inside the finished product ( Fig. 13 ) formed by joining the plies V1 and V2 with the glue C.
  • Figure 14 shows a modified embodiment of the embossing unit of figure 1 .
  • the same numbers indicate parts identical or equivalent to those of the embodiment in figure 1 .
  • a glue is applied only on the ply V1 through the glue dispenser 7, whilst the second embossing roller 11 has no dispenser and on the ply V2 neither a glue nor an ink or color is applied.
  • an adequate distribution of the embossing patterns may be adopted.
  • Figures 15 and 16 schematically show a criterion for producing embossing protuberances on the cylindrical surfaces of the two rollers 5 and 11 ( Fig. 15 ) and the result of the combination of these patterns on the web material N ( Fig. 16 ).
  • the decorative motifs are indicated with the letters A, B, C, D, E, and F.
  • the embossing patterns are arranged at the centre and near the vertices. The four areas are characterized by patterns different from each other, with the same criteria described above.
  • Figure 15 on the left, shows the planar development of the roller 11, which has a greater circumferential length, equal to five times the length of the single sheet F of the finished web material N.
  • embossing patterns different from each other, are obtained, which are symbolically represented by the groups of letters D, E, F, G, and H.
  • Figure 16 shows a portion of the web product N obtained by embossing the ply V1 with the embossing patterns A, B, C, and D on the roller 5 and the ply V2 with the embossing patterns D, E, F, G, and H.
  • the patterns arranged on roller 5 are interspersed with respect to the patterns of the roller 11, so as to have a distribution of glue (only on the patterns of the roller 5 in this example) sufficient to make the plies V1 and V2 to adhere. It could be also hypothesized to distribute the glue for example only on frame patterns, which surround each panel in which the roller 5 is subdivided, whilst the central area is embossed (on the ply V2) but devoid of glue, with advantages in terms of softness of the finished product.
  • FIG 17 shows a schematic greatly enlarged section of the web product N obtained with this system, herein C indicates the glue, applied on the protuberances P5 produced by the roller 5, whilst the protuberances P11 produced by the roller 11 are devoid of glue.
  • the protuberances P11 may have smaller height with respect to the protuberances 5P obtained on the embossing roller 5. This can be obtained with an adequate geometry of the protuberances 5P and 11 P of the embossing units 5 and 11 and/or with an adequate pressure and/or an adequate hardness of the coating of the pressure rollers 3, 9.
  • the two rollers 5, 11 have an area with equal pattern (pattern D).
  • pattern D the area with equal pattern
  • one of the areas with the decoration D can be modified with a decoration I different from all the others, in order to obtain a greater variety of motifs.
  • FIG 18 shows a further embodiment of the invention.
  • the embossing - laminating unit is indicated as a whole with 201. It comprises a first path for a ply V1 and a second path for a ply V2 which, once they have been processed, are joined to form a web material N.
  • a first embossing roller 203 Arranged along the path of the ply V1 is a first embossing roller 203 cooperating with a first pressure roller 205 to form a first embossing pattern with a first sequence of decorations, for example N decorations in succession.
  • a color dispenser for example a printing unit 206 similar to the dispenser 13 of figure 1 .
  • a second embossing roller 2007 Arranged downstream of the first embossing roller 203, again along the path of the ply V1, is a second embossing roller 2007 cooperating with a pressure roller 209, for example coated in an elastically yielding material, such as the pressure roller 205.
  • the embossing roller 207 presents on its own surface embossing protuberances defining a second sequence of embossing patterns, for example in a number of M, where N and M are numbers prime to each other.
  • the two embossing rollers 203, 207 present different diameters.
  • a second color dispenser unit 211 cooperates, for example a printing unit, which applies an ink on the ply V1.
  • a third embossing roller 213 cooperating with a third pressure roller 215.
  • 217 indicates a glue dispenser which applies a glue on the embossing protuberances produced by the embossing roller 213.
  • the ply V2 is fed in addition to the ply V1, to obtain lamination of the plies themselves.
  • two glue dispensers can be provided, to apply glues different from each other, for examples glues of different color.
  • the two glue dispensers are associated with two different embossing rollers.
  • the unit 211 can be a glue dispenser, analogously to the dispenser 217.
  • the unit 216 can dispense glue in combination with the unit 217 or with the unit 211.
  • all the units 206, 211, 217 can apply a glue, or the unit 206 applies a glue and the units 211, 217 a color or an ink.

Claims (54)

  1. Un produit en bande (N) comprenant au moins une épaisseur (V1, V2) décorée par gaufrage, dans lequel :
    - le long de l'extension dudit produit en bande (N) des combinaisons variables d'au moins une première séquence de motifs de gaufrage (A, B, C, D) et une seconde séquence de motifs de gaufrage (D, E, F, G, H) se suivent ;
    - la première séquence (A, B, C, D) est formée par un premier nombre de motifs de gaufrage et la seconde séquence (D, E, F, G, H) est formée par un second nombre de motifs de gaufrage, différent du premier nombre de motifs de gaufrage,
    - la première séquence a une longueur égale à un premier multiple d'une longueur de base (L) et la seconde séquence a une longueur égale à un second multiple de ladite longueur de base (L), lesdits premier et second multiples étant différents l'un de l'autre.
  2. Produit en bande selon la revendication 1, caractérisé en ce que ledit premier nombre de motifs de gaufrage (A, B, C, D) et ledit second nombre de motifs de gaufrage (D, E, F, G, H) sont des nombres premiers entre eux.
  3. Produit en bande selon la revendication 2, caractérisé en ce que lesdites première et seconde séquences (A, B, C, D, E, F, G, H) ne présentent pas de sous-séquences de motifs de gaufrage égales.
  4. Produit en bande selon la revendication 1, 2 ou 3, caractérisé en ce qu'il est subdivisé en feuilles (F), chaque feuille présentant une combinaison de motifs desdites première et seconde séquences (A, B, C, D ; D, E, F, G, H).
  5. Produit en bande selon la revendication 4, caractérisé en ce que lesdites feuilles (F) forment une bande continue et sont séparées l'une par rapport à l'autre par des lignes de perforation (T), le long desquelles lesdites feuilles (F) peuvent être séparées l'une de l'autre.
  6. Produit en bande selon la revendication 5, caractérisé en ce qu'il est enroulé en un rouleau (R).
  7. Produit en bande selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'il comprend au moins deux épaisseurs (V1, V2) jointes l'une à l'autre.
  8. Produit en bande selon la revendication 7, caractérisé en ce que sur une première desdits épaisseurs (V1, V2) l'une desdites première et seconde séquences de motifs (A, B, C, D ; D, E, F, G, H) est prévue et en ce que sur une seconde desdites épaisseurs (V1, V2) une autre desdites première et seconde séquences de motifs est prévue.
  9. Produit en bande selon la revendication 8, caractérisé en ce que lesdites première et seconde séquences présentent chacune une longueur égale à un multiple d'une dimension (L) desdites feuilles (F) et diffèrent d'une longueur égale à au moins un multiple de ladite dimension (L).
  10. Produit en bande selon la revendication 7, 8 ou 9, caractérisé en ce que lesdites épaisseurs (V1, V2) sont jointes l'une à l'autre à l'aide de colle (C).
  11. Produit en bande selon la revendication 10, caractérisé en ce qu'une première colle (C) est appliquée sur le motif de gaufrage de la première épaisseur (V1) et une seconde colle est appliquée sur le motif de gaufrage de la seconde épaisseur (V2).
  12. Produit en bande selon la revendication 11, caractérisé en ce que lesdites première et seconde colles sont de couleurs différentes.
  13. Produit en bande selon la revendication 10, caractérisé en ce qu'une première colle est appliquée sur au moins l'une desdites épaisseurs et une couleur est appliquée sur l'autre desdites épaisseurs en correspondance avec le gaufrage.
  14. Produit en bande selon la revendication 13, caractérisé en ce que ladite colle (C) est colorée et a une coloration différente de ladite couleur.
  15. Produit en bande selon la revendication 10, caractérisé en ce que sur au moins l'une desdites épaisseurs (V1, V2), une colle (C) et un colorant est appliqué.
  16. Produit en bande selon la revendication 15, caractérisé en ce que sur ladite épaisseur est appliquée une colle colorée et un colorant d'une couleur différente de celle de ladite colle.
  17. Produit en bande selon la revendication 15 ou 16, caractérisé en ce que ladite colle (C) est appliquée sur des motifs de gaufrage de l'une desdites première et seconde séquences (A, B, C, D ; D, E, F, G, H) et ledit colorant test appliqué sur des motifs de gaufrage de l'autre desdites première et seconde séquences (A, B, C, D ; D, E, F, G, H).
  18. Produit en bande selon une ou plusieurs des revendications 7 à 17, caractérisé en ce que :
    - le long d'une première épaisseur (V1) dudit produit en bande (N), l'une desdites première et seconde séquences (A, B, C, D ; D, E, F, G, H) de motifs de gaufrage est prévue, avec un premier nombre de motifs au moins partiellement différents les uns des autres, dont chacun est appliqué sur au moins l'une desdites feuilles (F) ;
    - le long d'une seconde épaisseur (V2) dudit produit en bande, une autre desdites première et seconde séquences (A, B, C, D ; D, E, F, G, H) de motifs de gaufrage est prévue, avec un second nombre de motifs au moins partiellement différents les uns des autres, dont chacun est appliqué sur au moins l'une desdites feuilles (F), ledit second nombre étant différent dudit premier nombre ;
    - chaque épaisseur (F) est décorée avec une combinaison d'un premier motif de la première séquence (A, B, C, D) gaufrée sur la première épaisseur (V1) et d'un second motif de la seconde séquence (D, E, F, G, H) gaufré sur la seconde épaisseur (V2).
  19. Produit en bande selon une ou plusieurs des revendications précédentes, caractérisé en ce que ladite première séquence et ladite seconde séquence de motifs (A, B, C, D ; D, E, F, G, H) sont appliquées de manière répétitive.
  20. Produit en bande selon une ou plusieurs des revendications précédentes, caractérisé en ce que lesdites première et seconde séquences de motifs (A, B, C, D ; D, E, F, G, H) présente des successions respectives de motifs au moins partiellement différents les uns des autres.
  21. Produit en bande selon une ou plusieurs des revendications précédentes, caractérisé en ce que les motifs de la première séquence (A, B, C, D) sont tous différents les uns des autres et les motifs de la seconde séquence (D, E, F, G, H) sont tous différents les uns des autres.
  22. Produit en bande selon une ou plusieurs des revendications précédentes, caractérisé en ce que les motifs de la seconde séquence (D, E, F, G, H) sont au moins partiellement différentes des motifs de la première séquence (A, B, C, D).
  23. Une unité de gaufrage (1) comprenant au moins un premier rouleau de graufrage (5) et un second rouleau de gaufrage (11), lesdits premier et second rouleaux de gaufrage étant pourvus de protubérances (5P, 11P) définissant des motifs de gaufrage, dans laquelle :
    - sur ledit premier rouleau de gaufrage (5), au moins une première séquence de motifs de gaufrage (A, B, C, D) est prévue le long de l'extension circonférentielle du rouleau (5) ;
    - sur ledit second rouleau de gaufrage (11) au moins une seconde séquence de motifs de gaufrage (D, E, F, G, H) est prévue le long de l'extension circonférentielle du rouleau (11) ;
    - ladite première séquence (A, B, C, D) et ladite seconde séquence (D, E, F, G, H) ont une longueur égale respectivement à un premier multiple (M1) et à un second multiple (M2) d'une longueur de base (L), lesdits premier et second multiples étant différents l'un de l'autre ; et
    - ledit premier rouleau de gaufrage (5) et ledit second rouleau de gaufrage (11) ont des diamètres différents l'un de l'autre et tels que les extensions circonférentielles desdits premier et second rouleaux de gaufrage diffèrent d'un multiple de ladite longueur de base (L).
  24. Unité de gaufrage (1) selon la revendication 23, caractérisée en ce que ledit premier multiple (M1) et ledit second multiple (M2) sont des nombres premiers l'un par rapport à l'autre.
  25. Unité de gaufrage (1) selon la revendication 23 ou 24, caractérisée en ce que ledit premier rouleau de gaufrage (5) coopère avec un premier rouleau de pressage (3) et ledit second rouleau de gaufrage (11) coopère avec un second rouleau de pressage (9).
  26. Unité de gaufrage (1) selon une ou plusieurs des revendications 23 à 25, caractérisée en ce que ledit multiple de la longueur de base (L) duquel diffèrent les extensions circonférentielle desdits deux rouleaux de gaufrage est égal à 1.
  27. Unité de gaufrage (1) selon une ou plusieurs des revendications 23 à 26, caractérisée en ce que lesdites deux séquences de motifs de gaufrage (A, B, C, D ; D, E, F, G, H) présentent des motifs au moins partiellement différents les uns des autres.
  28. Unité de gaufrage (1) selon une ou plusieurs des revendications 23 à 27, caractérisée en ce que chacune desdites séquences (A, B, C, D ; D, E, F, G, H) est formée de motifs différents les uns des autres.
  29. Unité de gaufrage (1) selon une ou plusieurs des revendications 23 à 28, caractérisée en ce qu'elle comprend deux chemins pour au moins deux épaisseurs (V1, V2), un premier chemin se développant autour du premier rouleau de gaufrage (5) et un second chemin se développant autour du second rouleau de gaufrage (11).
  30. Unité de gaufrage (1) selon la revendication 29, caractérisée en ce qu'un distributeur de colle (7 ; 13) est associé avec au moins l'un desdits rouleaux de gaufrage (5, 11).
  31. Unité de gaufrage (1) selon la revendication 29 ou 30, caractérisée en ce qu'un distributeur de colle respectif (7, 13) est associé avec chacun desdits premier et second rouleaux de gaufrage (5, 11).
  32. Unité de gaufrage (1) selon la revendication 31, caractérisée en ce que lesdits distributeurs de colle (7, 13) distribuent de la colle de différentes couleurs.
  33. Unité de gaufrage (1) selon la revendication 29 ou 30, caractérisée en ce qu'avec l'un desdits rouleaux de gaufrage (5, 11) est associé un distributeur de colle (7) et avec l'autre desdites rouleaux de gaufrage est associé un distributeur de colorant (13).
  34. Unité de gaufrage (1) selon une ou plusieurs des revendications 23 à 33, caractérisée en ce que chacun desdits premier et second rouleaux de gaufrage (5, 11) comprend une pluralité de séquences (A, B, C, D ; D, E, F, G, H) de motifs de gaufrage adjacents les uns aux autres le long de l'extension axiale du rouleau de gaufrage.
  35. Unité de gaufrage (1) selon la revendication 34, caractérisée en ce que les séquences de motifs adjacents le long d'au moins l'un desdits rouleaux de gaufrage (5, 11) sont différentes l'une de l'autre en ce qui concerne le type de motif ou l'agencement de la séquence des motifs.
  36. Unité de gaufrage (1) selon la revendication 35, caractérisée en ce que les séquences de motifs de gaufrage alignés axialement sur chacun desdits rouleaux de gaufrage (5, 11) présentent un nombre égal de motifs de gaufrage.
  37. Une ligne de transformation de Produit en bande pour un produit en bande (N), en particulier du papier, comprenant une unité de gaufrage (1) selon une ou plusieurs des revendications 23 à 36.
  38. Une ligne de transformation selon la revendication 37, comprenant une unité de perforation (21) et une machine de rembobinage (23).
  39. Une ligne de transformation selon la revendication 37 ou 38, comprenant une machine de sectionnement (25).
  40. Un procédé de gaufrage pour gaufrer un Produit en bande (N), caractérisé par le gaufrage dudit Produit en bande (N) à l'aide d'au moins une première séquence de motifs de gaufrage (A, B, C, D) et une seconde séquence de motifs de gaufrage (D, E, F, G, H) ; dans lequel la première séquence (A, B, C, D) a une première longueur égale à un premier multiple (M1) d'une longueur de base (L) et la seconde séquence (D, E, F, G, H) a une seconde longueur égale à un second multiple (M2) d'une longueur de base (L), lesdits premier et second multiples (M1, M2) étant différents l'un de l'autre, de sorte que lesdites première et seconde séquences (A, B, C, D ; D, E, F, G, H) aient des longueurs différentes l'une de l'autre, et en ce que sur ledit Produit en bande, une succession de combinaisons variables des motids des première et seconde séquences est produite.
  41. Procédé selon la revendication 40, caractérisé en ce que ledit Produit en bande (N) est subdivisé en une pluralité de feuilles (F), chaque feuille présentant une combinaison de motifs desdites première et seconde séquences de motifs au moins.
  42. Procédé selon la revendication 41, caractérisé par la subdivision du produit en bande (N) en des feuilles individuelles (F) grâce à des lignes de perforation transversales (T).
  43. Procédé selon la revendication 42, caractérisé par l'enroulement dudit Produit en bande en rouleaux (R).
  44. Procédé selon une ou plusieurs des revendications 40 à 43, caractérisé en ce que lesdites première et seconde séquences (A, B, C, D ; D, E, F, G) comprennent des motifs au moins partiellement différents les uns des autres.
  45. Procédé selon une ou plusieurs des revendications 40 à 44, caractérisé en ce que ledit premier multiple (M1) et ledit second multiple (M2) sont des nombres premiers l'un par rapport à l'autre.
  46. Procédé selon une ou plusieurs des revendications 40 à 45, caractérisé en ce que lesdits premier et second multiples (M1, M2) diffèrent d'une longueur égale à ladite longueur de base (L).
  47. Procédé selon une ou plusieurs des revendications 40 à 46, caractérisé par l'application desdites motifs de la première et de la seconde séquences (A, B, C, D ; D, E, F, G, H) sur une même épaisseur de produit en bande.
  48. Procédé selon une ou plusieurs des revendications 40 à 48, caractérisé par le gaufrage d'une première épaisseur (V1) avec ladite première séquence de motifs (A, B, C, D) et d'une seconde épaisseur (V2) avec ladite seconde séquence (D, E, F, G, H), et par la jonction desdites épaisseurs (V1, V2) l'une à l'autre.
  49. Procédé selon la revendication 48, caractérisé en ce que lesdites épaisseurs sont jointes par collage.
  50. Procédé selon la revendication 49, caractérisé en ce qu'une première colle (C) est appliquée sur au moins une partie du gaufrage de la première épaisseur (V1) et une seconde colle sur au moins une partie du gaufrage de la seconde épaisseur (V2).
  51. Procédé selon la revendication 50, caractérisé en ce que lesdites première et seconde colles présentent des couleurs différentes.
  52. Procédé selon la revendication 48 ou 49, caractérisé par l'application d'une colle sur une première épaisseur (V1) et d'au moins un colorant sur la seconde épaisseur (V2).
  53. Procédé selon la revendication 52, caractérisé par l'application sur lesdites épaisseurs (V1, V2) à la fois d'une colle et d'un colorant, sur des parties différentes du motif de gaufrage.
  54. Procédé selon la revendication 49, 52 ou 53, caractérisé en ce que ladite colle est colorée.
EP08425142.0A 2007-03-09 2008-03-07 Matériau en feuille gaufré, unité de gaufrage et procédé de fabrication Not-in-force EP1970193B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000057A ITFI20070057A1 (it) 2007-03-09 2007-03-09 Materiale in foglio goffrato, gruppo goffratore e metodo per la sua produzione.

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EP1970193A2 EP1970193A2 (fr) 2008-09-17
EP1970193A3 EP1970193A3 (fr) 2013-08-28
EP1970193B1 true EP1970193B1 (fr) 2017-06-21

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ITFI20070266A1 (it) * 2007-11-27 2009-05-28 Delicarta Spa "dispositivo goffratore per produrre materiale multivelo policromo e relativo metodo"
EP2277690A1 (fr) * 2009-07-23 2011-01-26 Andrea Galeotti Rouleau de gaufrage doté de plusieurs séquences de dessins
US20150000854A1 (en) * 2013-06-27 2015-01-01 The Procter & Gamble Company Sheet products bearing designs that vary among successive sheets, and apparatus and methods for producing the same
US20150001783A1 (en) * 2013-06-27 2015-01-01 The Procter & Gamble Company Sheet products bearing designs that vary among successive sheets, and apparatus and methods for producing the same
JP6589308B2 (ja) * 2015-03-16 2019-10-16 王子ホールディングス株式会社 エンボスが付与されたペーパーロール及びロール製品の製造方法
TWI766955B (zh) * 2017-03-02 2022-06-11 日商大王製紙股份有限公司 衛生薄頁紙
KR102501833B1 (ko) 2017-08-31 2023-02-20 다이오세이시가부시끼가이샤 위생 박엽지

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AU2004252546A1 (en) * 2003-06-23 2005-01-06 The Procter & Gamble Company Absorbent tissue-towel products comprising related embossed and printed indicia
ITFI20030208A1 (it) * 2003-08-01 2005-02-02 Perini Fabio Spa Metodo e dispositivo per la produzione di un prodotto
ITFI20060243A1 (it) * 2006-10-04 2008-04-05 Perini Fabio Spa Goffratore laminatore, metodo di goffratura di un materiale nastriforme e materiale goffrato

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EP1970193A2 (fr) 2008-09-17
ITFI20070057A1 (it) 2008-09-10
ES2640976T3 (es) 2017-11-07

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