EP0798106A1 - Method for forming rollers, particularly embossing rollers for paper webs - Google Patents

Method for forming rollers, particularly embossing rollers for paper webs Download PDF

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Publication number
EP0798106A1
EP0798106A1 EP97104122A EP97104122A EP0798106A1 EP 0798106 A1 EP0798106 A1 EP 0798106A1 EP 97104122 A EP97104122 A EP 97104122A EP 97104122 A EP97104122 A EP 97104122A EP 0798106 A1 EP0798106 A1 EP 0798106A1
Authority
EP
European Patent Office
Prior art keywords
protrusions
rollers
forming
series
embossing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97104122A
Other languages
German (de)
French (fr)
Other versions
EP0798106B1 (en
Inventor
Sauro Tronchetti
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.)
Industrie Cartarie Tronchetti SpA
Original Assignee
Industrie Cartarie Tronchetti SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Industrie Cartarie Tronchetti SpA filed Critical Industrie Cartarie Tronchetti SpA
Priority to SI9730066T priority Critical patent/SI0798106T1/en
Publication of EP0798106A1 publication Critical patent/EP0798106A1/en
Application granted granted Critical
Publication of EP0798106B1 publication Critical patent/EP0798106B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B31F2201/0717—Methods and means for forming 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
    • B31F2201/0707—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
    • B31F2201/0723—Characteristics of the rollers
    • B31F2201/0733—Pattern

Definitions

  • the present invention relates to a method for forming rollers, particularly rollers for embossing paper webs for tissue products, such as for example kitchen paper, toilet paper, et cetera.
  • Paper embossing machines for example for producing composite two-ply kitchen paper rolls, include two embossing rollers: each roller has a series of protrusions arranged in parallel rows and cooperates with a respective presser roller to emboss each sheet.
  • the embossing rollers are placed close together, so as to join the two embossed sheets, preferably by making the points coincide.
  • One of the two embossing rollers is coated with glue to paste the two sheets together.
  • the protrusions of the embossing rollers are provided by machining, or by means of chemical etching, so that the sheets have a uniform stippling that is constituted by parallel rows of points directed inward, that is to say, on the mutually facing sides of the sheets.
  • An advantageous condition for making the two sheets remain stably associated, however, is to have the largest possible number of protrusions of one sheet match those of the other sheet, in order to ensure a wide pasting surface.
  • the protrusions of one sheet must coincide with the spaces between the protrusions of the other sheet.
  • GB-A-2166690 discloses an embossing process producing embossed paper sheets, such as towels, comprising embossments having a major and minor axis wherein the major axis of substantially all of the embossments is aligned in the cross machine direction.
  • WO-A-93/25383 discloses a modular pattern roll, for embossing paper, made by assembling separate components rather than being one piece and chemically etched. This construction has advantages but is however complex and expensive.
  • An aim of the present invention is to provide a method for producing rollers, particularly rollers for embossing paper webs, which are capable to form complex ornamental patterns on the finished product.
  • An object of the invention is to provide a method that is considerably cheaper, from the production point of view, than conventional systems.
  • a further object is to provide a method that is capable of producing ornamental patterns or designs with various degrees of complexity, according to the requirements, but always with extreme precision and reproducibility, even mirror-symmetrical reproducibility, on multiple rollers.
  • rollers particularly rollers for embossing paper webs, comprising a first step of forming a series of protrusions and a second step of forming a pattern or design which includes the at least partial removal of a certain number of the protrusions.
  • the embossing roller according to the invention is suitable to be used in a substantially conventional machine for producing embossed paper, of the type that includes two embossing rollers mounted with parallel axes, so that the embossing surface of the two rollers is in contact at the points of the facing protrusions of each roller.
  • each embossing roller cooperates with a respective presser roller, made of rubber or other flexible material, to provide embossing on the respective paper web.
  • Two paper webs are in fact fed respectively in the first pair and in the second pair of embossing and presser rollers in order to be embossed. Once embossed, the two webs are joined at the line of contact between the two embossing rollers so as to obtain a two-ply paper web.
  • the embossing roller is produced with a first step of forming a uniform series of protrusions 3, for example by machining. It is possible to perform optional finishing operations, or one may move on directly to a second step of forming an ornamental pattern or design 5 that includes the at least partial removal of a certain number of protrusions.
  • the protrusions may be advantageously removed by means of a numeric-control machine, for example a milling machine. This allows to reproduce each ornamental pattern or design perfectly, and even in a symmetrical manner, on the second roller. It is in fact very important to match the highest possible number of facing points of the protrusions of the two rollers, in order to ensure good gluing of the two plies.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Paper (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Sanitary Thin Papers (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

A method for forming rollers (1), particularly rollers for embossing paper webs, includes a first step of forming a series of protrusions (3) and a second step of forming a pattern or design entailing the at least partial removal of a certain number of the protrusions (3).

Description

  • The present invention relates to a method for forming rollers, particularly rollers for embossing paper webs for tissue products, such as for example kitchen paper, toilet paper, et cetera.
  • Paper embossing machines, for example for producing composite two-ply kitchen paper rolls, include two embossing rollers: each roller has a series of protrusions arranged in parallel rows and cooperates with a respective presser roller to emboss each sheet.
  • The embossing rollers are placed close together, so as to join the two embossed sheets, preferably by making the points coincide. One of the two embossing rollers is coated with glue to paste the two sheets together.
  • The protrusions of the embossing rollers are provided by machining, or by means of chemical etching, so that the sheets have a uniform stippling that is constituted by parallel rows of points directed inward, that is to say, on the mutually facing sides of the sheets.
  • An advantageous condition for making the two sheets remain stably associated, however, is to have the largest possible number of protrusions of one sheet match those of the other sheet, in order to ensure a wide pasting surface. As an alternative, in the so-called "staggered" system, the protrusions of one sheet must coincide with the spaces between the protrusions of the other sheet.
  • GB-A-2166690 discloses an embossing process producing embossed paper sheets, such as towels, comprising embossments having a major and minor axis wherein the major axis of substantially all of the embossments is aligned in the cross machine direction.
  • WO-A-93/25383 discloses a modular pattern roll, for embossing paper, made by assembling separate components rather than being one piece and chemically etched. This construction has advantages but is however complex and expensive.
  • An aim of the present invention is to provide a method for producing rollers, particularly rollers for embossing paper webs, which are capable to form complex ornamental patterns on the finished product.
  • An object of the invention is to provide a method that is considerably cheaper, from the production point of view, than conventional systems.
  • A further object is to provide a method that is capable of producing ornamental patterns or designs with various degrees of complexity, according to the requirements, but always with extreme precision and reproducibility, even mirror-symmetrical reproducibility, on multiple rollers.
  • This aim, these objects, and others which will become apparent hereinafter are achieved by a method for producing rollers, particularly rollers for embossing paper webs, comprising a first step of forming a series of protrusions and a second step of forming a pattern or design which includes the at least partial removal of a certain number of the protrusions.
  • Further characteristics and advantages will become apparent from the description of a preferred but not exclusive embodiment of the invention, illustrated only by way of non-limitative example in the accompanying drawings, wherein:
    • Fig. 1 is a schematic perspective view of an embossing roller according to the invention; and
    • Fig. 2 is an enlarged partial view of a portion of the surface of the roller according to the invention.
  • The embossing roller according to the invention, generally designated by the reference numeral 1, is suitable to be used in a substantially conventional machine for producing embossed paper, of the type that includes two embossing rollers mounted with parallel axes, so that the embossing surface of the two rollers is in contact at the points of the facing protrusions of each roller.
  • In a per se known manner, each embossing roller cooperates with a respective presser roller, made of rubber or other flexible material, to provide embossing on the respective paper web. Two paper webs are in fact fed respectively in the first pair and in the second pair of embossing and presser rollers in order to be embossed. Once embossed, the two webs are joined at the line of contact between the two embossing rollers so as to obtain a two-ply paper web.
  • According to the invention, the embossing roller is produced with a first step of forming a uniform series of protrusions 3, for example by machining. It is possible to perform optional finishing operations, or one may move on directly to a second step of forming an ornamental pattern or design 5 that includes the at least partial removal of a certain number of protrusions.
  • The protrusions may be advantageously removed by means of a numeric-control machine, for example a milling machine. This allows to reproduce each ornamental pattern or design perfectly, and even in a symmetrical manner, on the second roller. It is in fact very important to match the highest possible number of facing points of the protrusions of the two rollers, in order to ensure good gluing of the two plies.
  • Indeed, by providing the design in a symmetrically identical manner on the two embossing rollers, all the points of one roller coincide with all the points of the other roller, ensuring the maximum number of gluing points between the two plies.
  • It has been observed in practice that the invention achieves the intended aim and objects, a method having been provided for forming embossing rollers with very complex ornamental patterns.
  • The method according to the invention is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims. All the details may be replaced with technically equivalent elements.
  • For example, the described steps can also be performed in reverse order.
  • The materials employed, as well as the dimensions, may of course be any according to the requirements and the state of the art.
  • Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly, such reference signs do not have any limiting effect on the scope of each element identified by way of example by such reference signs.

Claims (14)

  1. Method for producing rollers, particularly rollers for embossing paper webs, characterized in that it comprises a first step of forming a series of protrusions and a second step of forming a pattern or design which comprises the at least partial removal of a certain number of said protrusions.
  2. Method according to claim 1, characterized in that said first step of forming said series of protrusions comprises a machining operation.
  3. Method according to claim 1 or 2, characterized in that said first step of forming said series of protrusions comprises a chemical process.
  4. Method according to one or more of the preceding claims, characterized in that said first step of forming said series of protrusions is followed by a finishing operation.
  5. Method according to one or more of the preceding claims, characterized in that said second step of forming a pattern or design, which comprises the at least partial removal of a certain number of said protrusions, is performed by a numeric-control machine.
  6. Method according to one or more of the preceding claims, characterized in that said second step of forming a pattern or design which comprises the at least partial removal of a certain number of said protrusions is performed by a knurling machine.
  7. Method according to one or more of the preceding claims, characterized in that said numeric-control machine is a milling machine.
  8. Roller for embossing paper webs, characterized in that it comprises a series of protrusions that are distributed over the surface of the cylinder and patterns formed by at least partially removing some of said protrusions.
  9. Machine for embossing paper webs, characterized in that it comprises embossing rollers, each of which comprises a series of protrusions that are distributed over the surface of the roller, and patterns formed by at least partial removal of some of said protrusions.
  10. Machine according to claim 9, comprising two mutually opposite rollers, one of said rollers comprising patterns that are symmetrically identical to the designs of the other roller.
  11. Paper comprising two plies that are embossed so as to form a series of protrusions that are directed inward, characterized in that it comprises patterns formed by regions in which said raised portions are not present.
  12. Method according to one or more of the preceding claims, characterized in that it comprises one or more of the described and/or illustrated characteristics.
  13. Roller according to one or more of the preceding claims, characterized in that it comprises one or more of the described and/or illustrated characteristics.
  14. Machine according to one or more of the preceding claims, characterized in that it comprises one or more of the described and/or illustrated characteristics.
EP97104122A 1996-03-26 1997-03-12 Method for forming embossing rollers, particularly for paper webs Expired - Lifetime EP0798106B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI9730066T SI0798106T1 (en) 1996-03-26 1997-03-12 Method for forming embossing rollers, particularly for paper webs

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT96MI000592A IT1284433B1 (en) 1996-03-26 1996-03-26 PROCESS FOR FORMING CYLINDERS, ESPECIALLY FOR EMBOSSING PAPER TAPES
ITMI960592 1996-03-26

Publications (2)

Publication Number Publication Date
EP0798106A1 true EP0798106A1 (en) 1997-10-01
EP0798106B1 EP0798106B1 (en) 2000-05-24

Family

ID=11373774

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97104122A Expired - Lifetime EP0798106B1 (en) 1996-03-26 1997-03-12 Method for forming embossing rollers, particularly for paper webs

Country Status (12)

Country Link
EP (1) EP0798106B1 (en)
JP (1) JPH1071526A (en)
CN (1) CN1089676C (en)
AT (1) ATE193243T1 (en)
CA (1) CA2201018A1 (en)
DE (1) DE69702088T2 (en)
DK (1) DK0798106T3 (en)
ES (1) ES2147955T3 (en)
GR (1) GR3034184T3 (en)
IT (1) IT1284433B1 (en)
PT (1) PT798106E (en)
SI (1) SI0798106T1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2773564A1 (en) * 1998-01-13 1999-07-16 Fort James France Domestic ply domestic toilet paper material
EP1033240A1 (en) * 1999-03-01 2000-09-06 Industrie Cartarie Tronchetti S.p.A. Method and apparatus for embossing sheet materials such as paper webs and diaper backsheets
EP1103369A2 (en) 1999-11-26 2001-05-30 Focke & Co. (GmbH & Co.) Method and device for making collars for hinged-lid boxes
EP1324877A1 (en) 2000-10-13 2003-07-09 Boegli-Gravures S.A. Device for embossing and/or satin-finishing a flat material
EP1372946A1 (en) 2001-03-26 2004-01-02 Boegli-Gravures S.A. Device for treating flat material

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITFI20060072A1 (en) * 2006-03-15 2007-09-16 Perini Fabio Spa EMBOSSING ROLLER AND ITS PROCEDURE FOR ITS PRODUCTION
CN102744917A (en) * 2011-05-09 2012-10-24 金红叶纸业集团有限公司 Embossing roller for paper products, toilet paper with embossing and multi-layer toilet paper product
CN102407614B (en) * 2011-11-14 2013-09-18 佛山市南海区德昌誉机械制造有限公司 Embossing device for use on paper towel processing equipment and embossing production technology thereof
CN105921431B (en) 2016-05-04 2018-02-06 京东方科技集团股份有限公司 A kind of transfer plate cleaning equipment and its cleaning method

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1589595A (en) * 1923-11-03 1926-06-22 Cleveland Folding Mach Co Knurling
US2346231A (en) * 1942-12-28 1944-04-11 Joseph D Ramsey Method of engraving textile printing rolls
US2638050A (en) * 1952-05-28 1953-05-12 Multicolor Gravure Corp Method of making printing rolls
US4116594A (en) * 1975-12-12 1978-09-26 Magna-Graphics Corporation Embossing apparatus having magnetic roller and flexible embossing plates therefor
GB2166690A (en) * 1982-12-20 1986-05-14 Kimberly Clark Co Embossed paper
US4966832A (en) * 1988-05-13 1990-10-30 Nissan Motor Co., Ltd. Method of treating inner mold surface
EP0476976A1 (en) * 1990-09-17 1992-03-25 James River Corporation Of Virginia Apparatus for enhanced emboss bonding of multi-ply tissue products and tissue products obtainable with the apparatus
WO1993025383A1 (en) * 1992-06-12 1993-12-23 The Procter & Gamble Company Modular construction pattern rolls for use in paper converting and paper converted thereby

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1589595A (en) * 1923-11-03 1926-06-22 Cleveland Folding Mach Co Knurling
US2346231A (en) * 1942-12-28 1944-04-11 Joseph D Ramsey Method of engraving textile printing rolls
US2638050A (en) * 1952-05-28 1953-05-12 Multicolor Gravure Corp Method of making printing rolls
US4116594A (en) * 1975-12-12 1978-09-26 Magna-Graphics Corporation Embossing apparatus having magnetic roller and flexible embossing plates therefor
GB2166690A (en) * 1982-12-20 1986-05-14 Kimberly Clark Co Embossed paper
US4966832A (en) * 1988-05-13 1990-10-30 Nissan Motor Co., Ltd. Method of treating inner mold surface
EP0476976A1 (en) * 1990-09-17 1992-03-25 James River Corporation Of Virginia Apparatus for enhanced emboss bonding of multi-ply tissue products and tissue products obtainable with the apparatus
WO1993025383A1 (en) * 1992-06-12 1993-12-23 The Procter & Gamble Company Modular construction pattern rolls for use in paper converting and paper converted thereby

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2773564A1 (en) * 1998-01-13 1999-07-16 Fort James France Domestic ply domestic toilet paper material
WO1999036253A1 (en) * 1998-01-13 1999-07-22 Fort James France Sheet of embossed absorbent paper, and a method and device for producing same
EP1033240A1 (en) * 1999-03-01 2000-09-06 Industrie Cartarie Tronchetti S.p.A. Method and apparatus for embossing sheet materials such as paper webs and diaper backsheets
EP1103369A2 (en) 1999-11-26 2001-05-30 Focke & Co. (GmbH & Co.) Method and device for making collars for hinged-lid boxes
EP1324877A1 (en) 2000-10-13 2003-07-09 Boegli-Gravures S.A. Device for embossing and/or satin-finishing a flat material
EP1324877B1 (en) * 2000-10-13 2006-06-21 Boegli-Gravures S.A. Device for embossing and satin-finishing a flat material
EP1372946A1 (en) 2001-03-26 2004-01-02 Boegli-Gravures S.A. Device for treating flat material

Also Published As

Publication number Publication date
GR3034184T3 (en) 2000-11-30
DK0798106T3 (en) 2000-09-04
DE69702088T2 (en) 2000-11-09
CN1089676C (en) 2002-08-28
SI0798106T1 (en) 2000-10-31
EP0798106B1 (en) 2000-05-24
JPH1071526A (en) 1998-03-17
DE69702088D1 (en) 2000-06-29
ATE193243T1 (en) 2000-06-15
IT1284433B1 (en) 1998-05-21
ITMI960592A1 (en) 1997-09-26
ITMI960592A0 (en) 1996-03-26
ES2147955T3 (en) 2000-10-01
CA2201018A1 (en) 1997-09-26
CN1164467A (en) 1997-11-12
PT798106E (en) 2000-10-31

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