EP1970193B1 - Geprägtes bahnförmiges Material, Prägeeinheit und Herstellungsverfahren dafür - Google Patents

Geprägtes bahnförmiges Material, Prägeeinheit und Herstellungsverfahren dafür 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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English (en)
French (fr)
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EP1970193A3 (de
EP1970193A2 (de
Inventor
Giancarlo Cicalini
Mauro Gelli
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.)
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/de
Publication of EP1970193A3 publication Critical patent/EP1970193A3/de
Application granted granted Critical
Publication of EP1970193B1 publication Critical patent/EP1970193B1/de
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Anticipated expiration legal-status Critical

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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.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Decoration Of Textiles (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Claims (54)

  1. Bahnmaterialprodukt (N) mit mindestens einer Lage (V1, V2), die durch Prägen dekoriert ist, wobei:
    - entlang der Ausdehnung des Bahnmaterialprodukts (N) variable Kombinationen aus mindestens einer ersten Sequenz von Prägemustern (A, B, C, D) und einer zweiten Sequenz von Prägemustern (D, E, F, G, H) aufeinander folgen;
    - die erste Sequenz (A, B, C, D) durch eine erste Anzahl von Prägemustern gebildet wird und die zweite Sequenz (D, E, F, G, H) durch eine zweite Anzahl von Prägemustern gebildet wird, die sich von der ersten Anzahl von Prägemustern unterscheidet;
    - die erste Sequenz eine Länge aufweist, die gleich einem ersten Vielfachen einer Basislänge (L) ist und die zweite Sequenz eine Länge aufweist, die gleich einem zweiten Vielfachen der Basislänge (L) ist, wobei sich das erste und das zweite Vielfache voneinander unterscheiden.
  2. Bahnmaterialprodukt nach Anspruch 1, dadurch gekennzeichnet, dass die erste Anzahl von Prägemustern (A, B, C, D) und die zweite Anzahl von Prägemustern (D, E, F, G, H) teilerfremd zueinander sind.
  3. Bahnmaterialprodukt nach Anspruch 2, dadurch gekennzeichnet, dass die erste und die zweite Sequenz (A, B, C, D; D, E, F, G, H) keine gleichen Teilsequenzen von Prägemustern aufweisen.
  4. Bahnmaterialprodukt nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass dieses in Blätter (F) unterteilt ist, wobei jedes Blatt eine Kombination von Mustern der ersten und der zweiten Sequenz (A, B, C, D; D, E, F, G, H) aufweist.
  5. Bahnmaterialprodukt nach Anspruch 4, dadurch gekennzeichnet, dass die Blätter (F) eine durchgehende Bahn bilden und durch Perforationslinien (T) voneinander getrennt sind, entlang derer die Blätter (F) voneinander getrennt werden können.
  6. Bahnmaterialprodukt nach Anspruch 5, dadurch gekennzeichnet, dass dieses zu einer Rolle (R) aufgewickelt ist.
  7. Bahnmaterialprodukt nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass dieses mindestens zwei miteinander verbundene Lagen (V1, V2) umfasst.
  8. Bahnmaterialprodukt nach Anspruch 7, dadurch gekennzeichnet, dass auf einer ersten der Lagen (V1, V2) eine der Sequenzen von Mustern (A, B, C, D; D, E, F, G, H), die erste oder die zweite, vorgesehen ist, und dass auf einer zweiten der Lagen (V1, V2) eine andere der Sequenzen von Mustern, die erste oder die zweite, vorgesehen ist.
  9. Bahnmaterialprodukt nach Anspruch 8, dadurch gekennzeichnet, dass die erste und die zweite Sequenz jeweils eine Länge aufweisen, die gleich einem Vielfachen einer Ausdehnung (L) der Blätter (F) ist und sich um eine Länge unterscheiden, die gleich mindestens einem Vielfachen der Ausdehnung (L) ist.
  10. Bahnmaterialprodukt nach Anspruch 7, 8 oder 9, dadurch gekennzeichnet, dass die Lagen (V1, V2) mittels Leim (C) miteinander verbunden sind.
  11. Bahnmaterialprodukt nach Anspruch 10, dadurch gekennzeichnet, dass auf dem Prägemuster der ersten Lage (V1) ein erster Leim (C) aufgebracht ist und auf dem Prägemuster der zweiten Lage (V2) ein zweiter Leim aufgebracht ist.
  12. Bahnmaterialprodukt nach Anspruch 11, dadurch gekennzeichnet, dass der erste und der zweite Leim zueinander unterschiedliche Farben aufweisen.
  13. Bahnmaterialprodukt nach Anspruch 10, dadurch gekennzeichnet, dass ein erster Leim auf mindestens einer der Lagen aufgebracht ist und auf der anderen der Lagen eine Farbe in Übereinstimmung mit der Prägung aufgebracht ist.
  14. Bahnmaterialprodukt nach Anspruch 13, dadurch gekennzeichnet, dass der Leim (C) farbig ist und eine andere Färbung als die Farbe aufweist.
  15. Bahnmaterialprodukt nach Anspruch 10, dadurch gekennzeichnet, dass auf mindestens einer der Lagen (V1, V2) ein Leim (C) und ein Farbstoff aufgebracht ist.
  16. Bahnmaterialprodukt nach Anspruch 15, dadurch gekennzeichnet, dass auf der Lage ein farbiger Leim und ein Farbstoff mit einer anderen Farbe als der des Leims aufgebracht ist.
  17. Bahnmaterialprodukt nach Anspruch 15 oder 16, dadurch gekennzeichnet, dass der Leim (C) auf Prägemustern einer der Sequenzen (A, B, C, D; D, E, F, G, H), der ersten oder der zweiten, aufgebracht ist und dass der Farbstoff auf Prägemustern einer anderen der Sequenzen (A, B, C, D; D, E, F, G, H), der ersten oder der zweiten, aufgebracht ist.
  18. Bahnmaterialprodukt nach einem oder mehreren der Ansprüche 7 bis 17, dadurch gekennzeichnet, dass:
    - entlang einer ersten Lage (V1) des Bahnmaterialprodukts (N) eine der Sequenzen (A, B, C, D; D, E, F, G, H) von Prägemotiven aufgebracht ist, die erste oder die zweite, mit einer ersten Anzahl von sich zumindest teilweise voneinander unterscheidenden Mustern, von denen jedes auf mindestens einem der Blätter (F) aufgebracht ist;
    - entlang einer zweiten Lage (V2) des Bahnmaterialprodukts eine weitere der Sequenzen (A, B, C, D; D, E, F, G, H) von Prägemotiven aufgebracht ist, die erste oder die zweite, mit einer zweiten Anzahl von sich zumindest teilweise voneinander unterscheidenden Mustern, von denen jedes auf mindestens einem der Blätter (F) aufgebracht ist, wobei sich die zweite Anzahl von der ersten Anzahl unterscheidet;
    - jedes Blatt (F) dekoriert ist mit einer Kombination aus einem ersten Muster aus der ersten Sequenz (A, B, C, D) geprägt in die erste Lage (V1) und einem zweiten Muster aus der zweiten Sequenz (D, E, F, G, H) geprägt in die zweite Lage (V2).
  19. Bahnmaterialprodukt nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die erste Sequenz und die zweite Sequenz von Mustern (A, B, C, D; D, E, F, G, H) in sich wiederholender Weise aufgebracht sind.
  20. Bahnmaterialprodukt nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die erste und die zweite Sequenz von Mustern (A, B, C, D; D, E, F, G, H) jeweils Folgen von Mustern darstellen, die sich zumindest teilweise voneinander unterscheiden.
  21. Bahnmaterialprodukt nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sich die Muster der ersten Sequenz (A, B, C, D) alle voneinander unterscheiden und dass sich die Muster der zweiten Sequenz (D, E, F, G, H) alle voneinander unterscheiden.
  22. Bahnmaterialprodukt nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sich die Muster der zweiten Sequenz (D, E, F, G, H) zumindest teilweise von den Mustern der ersten Sequenz (A, B, C, D) unterscheiden.
  23. Prägeeinheit (1) mit mindestens einer ersten Prägewalze (5) und einer zweiten Prägewalze (11), wobei die erste und die zweite Prägewalze mit Vorsprüngen (5P, 11P) versehen sind, welche Prägemuster definieren, wobei:
    - auf der ersten Prägewalze (5) mindestens eine erste Sequenz von Prägemustern (A, B, C, D) entlang der Umfangsausdehnung der Walze (5) vorgesehen ist;
    - auf der zweiten Prägewalze (11) mindestens eine zweite Sequenz von Prägemustern (D, E, F, G, H) entlang der Umfangsausdehnung der Walze (11) vorgesehen ist;
    - die erste Sequenz (A, B, C, D) und die zweite Sequenz (D, E, F, G, H) eine Länge aufweisen, die gleich einem ersten Vielfachen (M1) beziehungsweise einem zweiten Vielfachen (M2) einer Basislänge (L) sind, wobei sich das erste und das zweite Vielfache voneinander unterscheiden; und
    - die erste Prägewalze (5) und die zweite Prägewalze (11) zueinander unterschiedliche Durchmesser aufweisen, und zwar so, dass sich die Umfangsausdehnung der ersten und zweiten Prägewalze um ein Vielfaches der Basislänge (L) voneinander unterscheiden.
  24. Prägeeinheit (1) nach Anspruch 23, dadurch gekennzeichnet, dass das erste Vielfache (M1) und das zweite Vielfache (M2) Zahlen sind, die teilerfremd zueinander sind.
  25. Prägeeinheit (1) nach Anspruch 23 oder 24, dadurch gekennzeichnet, dass die erste Prägewalze (5) mit einer ersten Andruckwalze (3) zusammenwirkt und dass die zweite Prägewalze (11) mit einer zweiten Andruckwalze (9) zusammenwirkt.
  26. Prägeeinheit (1) nach einem oder mehreren der Ansprüche 23 bis 25, dadurch gekennzeichnet, dass das Vielfache der Basislänge (L), um das sich die Umfangsausdehnungen der beiden Prägewalzen voneinander unterscheiden, gleich 1 ist.
  27. Prägeeinheit (1) nach einem oder mehreren der Ansprüche 23 bis 26, dadurch gekennzeichnet, dass die beiden Sequenzen von Prägemustern (A, B, C, D; D, E, F, G, H) Muster aufweisen, die sich zumindest teilweise voneinander unterscheiden.
  28. Prägeeinheit (1) nach einem oder mehreren der Ansprüche 23 bis 27, dadurch gekennzeichnet, dass jede der Sequenzen (A, B, C, D; D, E, F, G, H) aus zueinander unterschiedlichen Mustern gebildet ist.
  29. Prägeeinheit (1) nach einem oder mehreren der Ansprüche 23 bis 28, dadurch gekennzeichnet, dass diese zwei Wege für mindestens zwei Lagen (V1, V2) umfasst, wobei ein erster Weg um die erste Prägewalze (5) herum verläuft und ein zweiter Weg um die zweite Prägewalze (11) herum verläuft.
  30. Prägeeinheit (1) nach Anspruch 29, dadurch gekennzeichnet, dass mindestens einer der Prägewalzen (5, 11) ein Leimverteiler (7; 13) zugeordnet ist.
  31. Prägeeinheit (1) nach Anspruch 29 oder 30, dadurch gekennzeichnet, dass jeder der Prägewalzen (5, 11), der ersten und der zweiten, ein jeweiliger Leimverteiler (7, 13) zugeordnet ist.
  32. Prägeeinheit (1) nach Anspruch 31, dadurch gekennzeichnet, dass die Leimverteiler (7, 13) Leim mit zueinander unterschiedlichen Farben abgeben.
  33. Prägeeinheit (1) nach Anspruch 29 oder 30, dadurch gekennzeichnet, dass einer der Prägewalzen (5, 11) ein Leimverteiler (7) zugeordnet ist und dass der anderen der Prägewalzen ein Farbstoffverteiler (13) zugeordnet ist.
  34. Prägeeinheit (1) nach einem oder mehreren der Ansprüche 23 bis 33, dadurch gekennzeichnet, dass jede der Prägewalzen (5, 11), die erste und die zweite, mehrere Sequenzen (A, B, C, D; D, E, F, G, H) von Prägemustern nebeneinander entlang der axialen Erstreckung der Prägewalze aufweist.
  35. Prägeeinheit (1) nach Anspruch 34, dadurch gekennzeichnet, dass sich die Sequenzen von entlang mindestens einer der Prägewalzen (5, 11) nebeneinander angeordneten Mustern voneinander unterscheiden, und zwar hinsichtlich der Art des Musters oder der Anordnung der Folge von Mustern.
  36. Prägeeinheit (1) nach Anspruch 35, dadurch gekennzeichnet, dass die axial ausgerichteten Sequenzen von Prägemustern auf jeder der Prägewalzen (5, 11) eine gleiche Anzahl von Prägemustern aufweisen.
  37. Bahnmaterialverarbeitungslinie für ein Bahnmaterial (N), insbesondere für Papier, welche eine Prägeeinheit (1) nach einem oder mehreren der Ansprüche 23 bis 36 umfasst.
  38. Verarbeitungslinie nach Anspruch 37, welche eine Perforiereinheit (21) und einer Umwickelmaschine (23) umfasst.
  39. Verarbeitungslinie nach Anspruch 37 oder 38, welche eine Trennmaschine (25) umfasst.
  40. Prägeverfahren zum Prägen eines Bahnmaterials (N), gekennzeichnet durch Prägen des Bahnmaterials (N) mittels mindestens einer ersten Sequenz von Prägemustern (A, B, C, D) und einer zweiten Sequenz von Prägemustern (D, E, F, G, H), wobei die erste Sequenz (A, B, C, D) eine erste Länge aufweist, die gleich einem ersten Vielfachen (M1) einer Basislänge (L) ist, und die zweite Sequenz (D, E, F, G, H) eine zweite Länge aufweist, die gleich einem zweiten Vielfachen (M2) der Basislänge (L) ist, wobei sich das erste und das zweite Vielfache voneinander unterscheiden, so dass die erste und die zweite Sequenz (A, B, C, D; D, E, F, G, H) zueinander unterschiedliche Längen aufweisen und so dass auf dem Bahnmaterial eine Folge von variablen Kombinationen der Muster der ersten und der zweiten Sequenz erzeugt wird.
  41. Verfahren nach Anspruch 40, dadurch gekennzeichnet, dass das Bahnmaterial (N) in eine Mehrzahl von Blättern (F) unterteilt ist, wobei jedes Blatt eine Kombination von Mustern aus der mindestens ersten und zweiten Sequenz von Mustern aufweist.
  42. Verfahren nach Anspruch 41, dadurch gekennzeichnet, dass das Bahnmaterial (N) durch quer verlaufende Perforationslinien (T) in einzelne Blätter (F) unterteilt wird.
  43. Verfahren nach Anspruch 42, dadurch gekennzeichnet, dass das Bahnmaterial zu Rollen (R) aufgewickelt wird.
  44. Verfahren nach einem oder mehreren der Ansprüche 40 bis 43, dadurch gekennzeichnet, dass die erste und die zweite Sequenz (A, B, C, D; D, E, F, G, H) Muster aufweisen, die sich zumindest teilweise voneinander unterscheiden.
  45. Verfahren nach einem oder mehreren der Ansprüche 40 bis 44, dadurch gekennzeichnet, dass das erste Vielfache (M1) und das zweite Vielfache (M2) Zahlen sind, die teilerfremd zueinander sind.
  46. Verfahren nach einem oder mehreren der Ansprüche 40 bis 45, dadurch gekennzeichnet, dass sich das erste und das zweite Vielfache (M1, M2) um eine Länge unterscheiden, die gleich der Basislänge (L) ist.
  47. Verfahren nach einem oder mehreren der Ansprüche 40 bis 46, dadurch gekennzeichnet, dass die Muster der ersten und der zweiten Sequenz (A, B, C, D; D, E, F, G, H) auf dieselbe Lage aus Bahnmaterial aufgebracht werden.
  48. Verfahren nach einem oder mehreren der Ansprüche 40 bis 47, dadurch gekennzeichnet, dass eine erste Lage (V1) mit der ersten Sequenz von Mustern (A, B, C, D) geprägt wird und eine zweite Lage (V2) mit der zweiten Sequenz (D, E, F, G, H) geprägt wird und dass die Lagen (V1, V2) miteinander verbunden werden.
  49. Verfahren nach Anspruch 48, dadurch gekennzeichnet, dass die Lagen durch Verleimen miteinander verbunden werden.
  50. Verfahren nach Anspruch 49, dadurch gekennzeichnet, dass ein erster Leim (C) auf mindestens einen Teil der Prägung der ersten Lage (V1) aufgebracht wird und dass ein zweiter Leim auf mindestens einen Teil der Prägung der zweiten Lage (V2) aufgebracht wird.
  51. Verfahren nach Anspruch 50, dadurch gekennzeichnet, dass der erste und der zweite Leim Farben aufweisen, die sich voneinander unterscheiden.
  52. Verfahren nach Anspruch 48 oder 49, dadurch gekennzeichnet, dass ein Leim auf eine erste Lage (V1) aufgebracht wird und mindestens ein Farbstoff auf die zweite Lage (V2) aufgebracht wird.
  53. Verfahren nach Anspruch 52, dadurch gekennzeichnet, dass auf die Lage (V1, V2) sowohl ein Leim als auch ein Farbstoff aufgebracht werden, und zwar auf verschiedene Abschnitte des Prägemusters.
  54. Verfahren nach Anspruch 49, 52 oder 53, dadurch gekennzeichnet, dass der Leim farbig ist.
EP08425142.0A 2007-03-09 2008-03-07 Geprägtes bahnförmiges Material, Prägeeinheit und Herstellungsverfahren dafür Not-in-force EP1970193B1 (de)

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EP1970193A2 EP1970193A2 (de) 2008-09-17
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EP1970193B1 true EP1970193B1 (de) 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 (de) * 2009-07-23 2011-01-26 Andrea Galeotti Prägewalze mit mehreren Sequenzentwürfen
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
JP6461449B1 (ja) * 2017-03-02 2019-01-30 大王製紙株式会社 衛生薄葉紙
EP3677422B1 (de) 2017-08-31 2022-11-30 Daio Paper Corporation Hygiene-tissuepapier

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US20040258886A1 (en) * 2003-06-23 2004-12-23 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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ITFI20070057A1 (it) 2008-09-10
ES2640976T3 (es) 2017-11-07
EP1970193A2 (de) 2008-09-17

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