WO2001007245A1 - Method and apparatus for embossing paper webs - Google Patents

Method and apparatus for embossing paper webs Download PDF

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Publication number
WO2001007245A1
WO2001007245A1 PCT/EP2000/007066 EP0007066W WO0107245A1 WO 2001007245 A1 WO2001007245 A1 WO 2001007245A1 EP 0007066 W EP0007066 W EP 0007066W WO 0107245 A1 WO0107245 A1 WO 0107245A1
Authority
WO
WIPO (PCT)
Prior art keywords
embossing
roller
contrast
paper
unit
Prior art date
Application number
PCT/EP2000/007066
Other languages
French (fr)
Inventor
Sauro Tronchetti
Original Assignee
Industrie Cartarie Tronchetti S.P.A
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11383429&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2001007245(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Industrie Cartarie Tronchetti S.P.A filed Critical Industrie Cartarie Tronchetti S.P.A
Priority to DE60019942T priority Critical patent/DE60019942T2/en
Priority to EP00958288A priority patent/EP1216144B1/en
Priority to AT00958288T priority patent/ATE294700T1/en
Priority to AU69860/00A priority patent/AU6986000A/en
Publication of WO2001007245A1 publication Critical patent/WO2001007245A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/07—Embossing, i.e. producing impressions formed by locally deep-drawing, e.g. using rolls provided with complementary profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0723—Characteristics of the rollers
    • B31F2201/0728—Material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0741—Roller cooperating with a non-even counter roller
    • B31F2201/0743—Roller cooperating with a non-even counter roller having a matching profile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0771—Other aspects of the embossing operations
    • B31F2201/0774—Multiple successive embossing operations
    • 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
    • B31F2201/0782—Layout of the complete embossing machine, of the embossing line

Definitions

  • the present invention relates to a method and an apparatus for embossing paper webs, particularly for forming products such as tissues, for example toilet tissue.
  • Paper embossing systems for example for producing composite two-ply rolls of kitchen paper, generally include a roll unwinding device which is suitable to feed two plies of paper to an embossing unit which can be provided with a system for pasting the two plies.
  • the embossing unit may include two embossing rollers, each provided with a plurality of protrusions which are arranged in parallel rows and each cooperating with a respective presser roller to emboss each sheet.
  • One of the two embossing rollers can be coated with paste so as to paste the two sheets.
  • the protrusions of the embossing rollers are formed by mechanical machining or by chemical processes for removing material, so that the sheets have a uniform stippling constituted by parallel rows of points directed inward, i.e., on the facing sides of the sheets.
  • a knurling unit which is suitable to knurl the roll in order to join the two plies.
  • the aim of the present invention is to provide a method and an apparatus which can overcome the drawbacks of the prior art.
  • Another object of the present invention is to provide a system which is capable of producing ornamental patterns or designs, with a second embossing, without altering the first foundation embossing.
  • Another object of the present invention is to provide a method which is capable of producing ornamental patterns or designs of varying complexity according to requirements and in a highly versatile way, i.e., so that it is possible to change the design rapidly and cheaply.
  • Another object of the present invention is to provide an embossing method which can produce even complex ornamental patterns on the finished product.
  • Another object of the present invention is to provide a method and an apparatus which provides more flexible management, in terms of production, than prior art systems for producing complex designs.
  • a method for embossing paper webs particularly for manufacturing products of the tissue type, such as toilet tissue, comprising a step of first embossing and characterized in that it comprises a second embossing, after the first one, which is deeper than the thickness of the sheets plus a certain value.
  • Figure 1 is a schematic side elevation view of an embossing apparatus of the point-to-point type
  • FIG. 2 is a schematic side elevation view of an embossing apparatus of the DERL or DESL type. Ways of carrying out the invention
  • a machine for performing so-called point-to- point embossing is shown; the machine is generally designated by the reference numeral 1 and includes a feeder (not shown) which is suitable to feed a first embossing unit 5 with two plies of paper 7 and 9.
  • the first embossing unit includes a first embossing roller 11, with a corresponding rubber roller 13, and a second embossing roller 15, with a corresponding rubber roller 17.
  • a pasting device 19 which is suitable to spread paste onto the roller 15 in order to paste the two plies 7 and 9 together.
  • the output of the first embossing unit is a web of embossed paper 21 which, according to the invention, is passed through a second embossing unit 10 which is constituted, in the illustrated example, by an embossing roller 31 which cooperates with a contrast roller 23.
  • the roller 31 is made of steel, is machined in relief and is suitable to work in contrast with the roller 23, which is made of rubber.
  • the contrast roller 23 also can be made of steel and be provided with recesses for receiving the points of the roller 31.
  • the recesses of the contrast roller are advantageously shallower than the height of the points of the roller 31.
  • the embossing roller 31 may have a jacket which is suitable to support a plate on which the design is formed by virtue of various methods which are known in the field.
  • the contrast roller is made of rubber.
  • the embossing performed by the second embossing unit is at least equal in depth to the thickness of the two sheets plus a certain value, which corresponds to the intended depth of the second ornamental pattern.
  • the value is equal to the depth of the penetration of the points of the embossing roller into the rubber roller.
  • the value of the depth of the second embossing could be approximately 1 mm, to which a processing margin must be added.
  • the second embossing unit may have a second embossing roller (not shown) which acts on the same contrast roller 23, alternatively to the roller 31. In this manner, by using alternatively one embossing roller or the other, each having a different design, it is possible to vary the embossed design in a few minutes simply by pressing one or the other of the rollers against the contrast roller 23.
  • the system according to the invention has some important advantages: it is in fact possible to change the design on the paper in a very short time.
  • embossing rollers in the second embossing unit allows to vary the ornamental pattern almost instantaneously, simply by actuating one roller instead of the other.
  • the web 21 is thus subjected to a second embossing which is superimposed on the first embossing performed by the first embossing unit.
  • Figure 2 illustrates an embossing machine, generally designated by the reference numeral 101, for performing embossing of the DERL/DESL type, which includes a feeder (not shown) which is suitable to feed a first embossing unit 105 with two plies of paper 107, 109.
  • the first embossing unit includes a first embossing roller 111, with the corresponding rubber roller 113, and a second embossing roller 115, with the corresponding rubber roller 117.
  • there is a pasting device 119 for pasting the two plies 7 and 9.
  • the machine according to the invention allows to produce complex designs and ornamental patterns. While the first embossing unit can provide a conventional geometric pattern, the second embossing unit can in fact be used to superimpose a particular design.
  • the invention achieves the intended aim and objects; it is in fact extremely simple to provide even complex ornamental patterns by superimposing two separate embossings without however altering the foundation embossing.
  • the machine according to the invention is extremely flexible; it is in fact possible to vary the design on the paper simply by replacing the second embossing roller.
  • the second embossing unit can be easily excluded if one wishes to emboss the paper in a conventional manner with a simple design due to production requirements.
  • the invention is particularly advantageous for products constituted by two or more plies.
  • the second embossing can also be utilized to mutually paste the plies, if paste has been spread onto one of the two plies in the first embossing step.

Abstract

A method for producing embossed paper webs, particularly for manufacturing products of the tissue type, such as toilet tissue, which includes a step of first embossing and characterized in that it includes a second embossing, after the first one, which is deeper than the thickness of the web plus a certain value.

Description

METHOD AND APPARATUS FOR EMBOSSING PAPER WEBS
Technical field The present invention relates to a method and an apparatus for embossing paper webs, particularly for forming products such as tissues, for example toilet tissue.
Background Art Paper embossing systems, for example for producing composite two-ply rolls of kitchen paper, generally include a roll unwinding device which is suitable to feed two plies of paper to an embossing unit which can be provided with a system for pasting the two plies.
The embossing unit may include two embossing rollers, each provided with a plurality of protrusions which are arranged in parallel rows and each cooperating with a respective presser roller to emboss each sheet.
One of the two embossing rollers can be coated with paste so as to paste the two sheets.
The protrusions of the embossing rollers are formed by mechanical machining or by chemical processes for removing material, so that the sheets have a uniform stippling constituted by parallel rows of points directed inward, i.e., on the facing sides of the sheets. At the output of the embossing unit, if pasting is not provided, there is generally provided a knurling unit which is suitable to knurl the roll in order to join the two plies.
One problem that is currently strongly felt is to provide complex designs by embossing. The methods proposed up to now, and capable of producing complex designs, are not only extremely onerous but also scarcely versatile. To provide even minimal changes to the design it is in fact necessary to replace the embossing rollers with new rollers which include the new design.
Disclosure of the Invention The aim of the present invention is to provide a method and an apparatus which can overcome the drawbacks of the prior art.
Another object of the present invention is to provide a system which is capable of producing ornamental patterns or designs, with a second embossing, without altering the first foundation embossing. Another object of the present invention is to provide a method which is capable of producing ornamental patterns or designs of varying complexity according to requirements and in a highly versatile way, i.e., so that it is possible to change the design rapidly and cheaply.
Another object of the present invention is to provide an embossing method which can produce even complex ornamental patterns on the finished product.
Another object of the present invention is to provide a method and an apparatus which provides more flexible management, in terms of production, than prior art systems for producing complex designs. This aim, these objects and others which will become better apparent hereinafter are achieved by a method for embossing paper webs, particularly for manufacturing products of the tissue type, such as toilet tissue, comprising a step of first embossing and characterized in that it comprises a second embossing, after the first one, which is deeper than the thickness of the sheets plus a certain value.
Brief description of the drawings Further characteristics and advantages of the present invention will become better apparent from the following detailed description of a preferred but not exclusive embodiment thereof illustrated only by way of non-limitative example in the accompanying drawings, wherein:
Figure 1 is a schematic side elevation view of an embossing apparatus of the point-to-point type;
Figure 2 is a schematic side elevation view of an embossing apparatus of the DERL or DESL type. Ways of carrying out the invention With reference to Figure 1, a machine for performing so-called point-to- point embossing is shown; the machine is generally designated by the reference numeral 1 and includes a feeder (not shown) which is suitable to feed a first embossing unit 5 with two plies of paper 7 and 9. The first embossing unit includes a first embossing roller 11, with a corresponding rubber roller 13, and a second embossing roller 15, with a corresponding rubber roller 17. Optionally, there is a pasting device 19 which is suitable to spread paste onto the roller 15 in order to paste the two plies 7 and 9 together. The output of the first embossing unit is a web of embossed paper 21 which, according to the invention, is passed through a second embossing unit 10 which is constituted, in the illustrated example, by an embossing roller 31 which cooperates with a contrast roller 23.
The roller 31 is made of steel, is machined in relief and is suitable to work in contrast with the roller 23, which is made of rubber.
As an alternative, the contrast roller 23 also can be made of steel and be provided with recesses for receiving the points of the roller 31. The recesses of the contrast roller are advantageously shallower than the height of the points of the roller 31. The embossing roller 31 may have a jacket which is suitable to support a plate on which the design is formed by virtue of various methods which are known in the field. In this case, the contrast roller is made of rubber.
The embossing performed by the second embossing unit is at least equal in depth to the thickness of the two sheets plus a certain value, which corresponds to the intended depth of the second ornamental pattern.
More particularly, the value is equal to the depth of the penetration of the points of the embossing roller into the rubber roller.
By way of example, the value of the depth of the second embossing could be approximately 1 mm, to which a processing margin must be added. The second embossing unit may have a second embossing roller (not shown) which acts on the same contrast roller 23, alternatively to the roller 31. In this manner, by using alternatively one embossing roller or the other, each having a different design, it is possible to vary the embossed design in a few minutes simply by pressing one or the other of the rollers against the contrast roller 23.
The system according to the invention has some important advantages: it is in fact possible to change the design on the paper in a very short time.
The optional use of two embossing rollers in the second embossing unit allows to vary the ornamental pattern almost instantaneously, simply by actuating one roller instead of the other.
The web 21 is thus subjected to a second embossing which is superimposed on the first embossing performed by the first embossing unit. The web 25, which includes the second embossing and therefore the final design, leaves the second embossing unit and is sent to the subsequent processing stations, for example to a roll-forming machine, not shown, in a per se known manner.
The invention can also be applied to machines of a different type; for example, Figure 2 illustrates an embossing machine, generally designated by the reference numeral 101, for performing embossing of the DERL/DESL type, which includes a feeder (not shown) which is suitable to feed a first embossing unit 105 with two plies of paper 107, 109. The first embossing unit includes a first embossing roller 111, with the corresponding rubber roller 113, and a second embossing roller 115, with the corresponding rubber roller 117. Optionally, there is a pasting device 119 for pasting the two plies 7 and 9.
A web of embossed paper 121 exits from the first embossing unit and, according to the invention, is passed through the second embossing unit 10, constituted by the embossing roller 31 which cooperates with the contrast roller 23, as described above. The machine according to the invention allows to produce complex designs and ornamental patterns. While the first embossing unit can provide a conventional geometric pattern, the second embossing unit can in fact be used to superimpose a particular design.
In practice it has been observed that the invention achieves the intended aim and objects; it is in fact extremely simple to provide even complex ornamental patterns by superimposing two separate embossings without however altering the foundation embossing.
The machine according to the invention is extremely flexible; it is in fact possible to vary the design on the paper simply by replacing the second embossing roller. The second embossing unit can be easily excluded if one wishes to emboss the paper in a conventional manner with a simple design due to production requirements.
The invention is particularly advantageous for products constituted by two or more plies. The second embossing can also be utilized to mutually paste the plies, if paste has been spread onto one of the two plies in the first embossing step.
The method and the apparatus according to the invention are susceptible of numerous modifications and variations, within the scope of the appended claims. All the details may be replaced with technically equivalent elements. The materials used, as well as the dimensions, may of course be any according to requirements and to the state of the art.
The present application is based upon Italian patent application No. MI99A001668, filed on 27 July 1999, the disclosure of which is hereby expressly incorporated by reference thereto.

Claims

1. A method for embossing paper webs, particularly for manufacturing products of the tissue type, such as toilet tissue, comprising a step of first embossing and characterized in that it comprises a second embossing, after said first one, which is deeper than the thickness of said web plus a certain value.
2. An apparatus for embossing paper webs, particularly for producing products of the tissue type, such as toilet tissue, comprising a first embossing unit which is constituted by at least one embossing roller suitable to provide a first embossing on said paper web, characterized in that it comprises a second embossing unit which is located downstream of said first embossing unit and is suitable to provide, on said paper, a second embossing which is deeper than the thickness of said web plus a certain value.
3. The apparatus according to claim 2, characterized in that said second embossing unit comprises a steel roller which is machined in relief and is suitable to work in contrast with a contrast roller made of rubber.
4. The apparatus according to claim 2, characterized in that said second embossing unit comprises a male roller made of steel which is machined in relief and is suitable to work in contrast with a female contrast roller made of steel.
5. The apparatus according to one or more of the preceding claims, characterized in that said second embossing unit comprises a second embossing roller which is suitable to operate alternatively to the other embossing roller on the same contrast roller in order to vary the design of the second embossing.
PCT/EP2000/007066 1999-07-27 2000-07-24 Method and apparatus for embossing paper webs WO2001007245A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE60019942T DE60019942T2 (en) 1999-07-27 2000-07-24 METHOD AND DEVICE FOR PRIMING PAPER WEBS
EP00958288A EP1216144B1 (en) 1999-07-27 2000-07-24 Method and apparatus for embossing paper webs
AT00958288T ATE294700T1 (en) 1999-07-27 2000-07-24 METHOD AND DEVICE FOR EMBOSSING PAPER WEAVES
AU69860/00A AU6986000A (en) 1999-07-27 2000-07-24 Method and apparatus for embossing paper webs

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1999MI001668A IT1313577B1 (en) 1999-07-27 1999-07-27 METHOD AND EQUIPMENT FOR EMBOSSING PAPER SHEETS IN ROLL.
ITMI99A001668 1999-07-27

Publications (1)

Publication Number Publication Date
WO2001007245A1 true WO2001007245A1 (en) 2001-02-01

Family

ID=11383429

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/007066 WO2001007245A1 (en) 1999-07-27 2000-07-24 Method and apparatus for embossing paper webs

Country Status (7)

Country Link
EP (1) EP1216144B1 (en)
AT (1) ATE294700T1 (en)
AU (1) AU6986000A (en)
DE (1) DE60019942T2 (en)
ES (1) ES2238305T3 (en)
IT (1) IT1313577B1 (en)
WO (1) WO2001007245A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014077751A1 (en) * 2012-11-16 2014-05-22 Sca Hygiene Products Ab Method for embossing a multi-ply paper product and an embossed multi-ply paper product
IT202000013255A1 (en) * 2020-06-04 2021-12-04 Pack Service S R L PROCEDURE FOR THE PRODUCTION OF ITEMS IN TISSUE PAPER

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102529179A (en) * 2012-01-06 2012-07-04 金红叶纸业集团有限公司 Tissue paper, papermaking equipment and manufacturing method
ES2578830B1 (en) * 2015-01-29 2017-08-10 L.C. Paper 1881, S. A. PROCEDURE FOR OBTAINING SUNFLOWED PAPER PAPER AND SUNFLOWING UNIT OF A SINGLE LAYER CREPED PAPER SHEET

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1443629A (en) * 1974-12-18 1976-07-21 Scott Paper Co Absorbent fibrous sheet material and method and apparatus for making it
US4483728A (en) * 1980-07-14 1984-11-20 Kimberly-Clark Corporation Relieved patterned marrying roll
EP0816058A2 (en) * 1996-07-01 1998-01-07 INDUSTRIE CARTARIE TRONCHETTI SpA Embossing apparatus particularly for paper in roll form
US5913765A (en) * 1995-03-02 1999-06-22 Kimberly-Clark Worldwide, Inc. System and method for embossing a pattern on a consumer paper product
EP0928682A1 (en) * 1998-01-12 1999-07-14 Fort James France Device for the mecanical treatment of paper which has an improved support for a roller and method for exchanging the roller in such a device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1443629A (en) * 1974-12-18 1976-07-21 Scott Paper Co Absorbent fibrous sheet material and method and apparatus for making it
US4483728A (en) * 1980-07-14 1984-11-20 Kimberly-Clark Corporation Relieved patterned marrying roll
US5913765A (en) * 1995-03-02 1999-06-22 Kimberly-Clark Worldwide, Inc. System and method for embossing a pattern on a consumer paper product
EP0816058A2 (en) * 1996-07-01 1998-01-07 INDUSTRIE CARTARIE TRONCHETTI SpA Embossing apparatus particularly for paper in roll form
EP0928682A1 (en) * 1998-01-12 1999-07-14 Fort James France Device for the mecanical treatment of paper which has an improved support for a roller and method for exchanging the roller in such a device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014077751A1 (en) * 2012-11-16 2014-05-22 Sca Hygiene Products Ab Method for embossing a multi-ply paper product and an embossed multi-ply paper product
CN104822520A (en) * 2012-11-16 2015-08-05 Sca卫生用品公司 Method for embossing multi-ply paper product and embossed multi-ply paper product
AU2012394470B2 (en) * 2012-11-16 2016-05-12 Sca Hygiene Products Ab Method for embossing a multi-ply paper product and an embossed multi-ply paper product
EP2919981A4 (en) * 2012-11-16 2016-07-13 Sca Hygiene Prod Ab Method for embossing a multi-ply paper product and an embossed multi-ply paper product
RU2608296C2 (en) * 2012-11-16 2017-01-17 Ска Хайджин Продактс Аб Method of multi-layer product from tissue paper embossing and embossed multilayer product from tissue paper
IT202000013255A1 (en) * 2020-06-04 2021-12-04 Pack Service S R L PROCEDURE FOR THE PRODUCTION OF ITEMS IN TISSUE PAPER

Also Published As

Publication number Publication date
ATE294700T1 (en) 2005-05-15
EP1216144A1 (en) 2002-06-26
ES2238305T3 (en) 2005-09-01
DE60019942T2 (en) 2006-05-04
ITMI991668A0 (en) 1999-07-27
DE60019942D1 (en) 2005-06-09
ITMI991668A1 (en) 2001-01-27
EP1216144B1 (en) 2005-05-04
IT1313577B1 (en) 2002-09-09
AU6986000A (en) 2001-02-13

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