EP0816058B1 - Embossing apparatus particularly for paper in roll form - Google Patents

Embossing apparatus particularly for paper in roll form Download PDF

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Publication number
EP0816058B1
EP0816058B1 EP97110547A EP97110547A EP0816058B1 EP 0816058 B1 EP0816058 B1 EP 0816058B1 EP 97110547 A EP97110547 A EP 97110547A EP 97110547 A EP97110547 A EP 97110547A EP 0816058 B1 EP0816058 B1 EP 0816058B1
Authority
EP
European Patent Office
Prior art keywords
embossing
paper
cylinder
unit
roll form
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.)
Revoked
Application number
EP97110547A
Other languages
German (de)
French (fr)
Other versions
EP0816058A3 (en
EP0816058A2 (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
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Application filed by Industrie Cartarie Tronchetti SpA filed Critical Industrie Cartarie Tronchetti SpA
Publication of EP0816058A2 publication Critical patent/EP0816058A2/en
Publication of EP0816058A3 publication Critical patent/EP0816058A3/en
Application granted granted Critical
Publication of EP0816058B1 publication Critical patent/EP0816058B1/en
Anticipated expiration legal-status Critical
Revoked 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
    • B31F2201/0723—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
    • B31F2201/0771—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
    • B31F2201/0771—Other aspects of the embossing operations
    • B31F2201/0776—Exchanging embossing tools

Definitions

  • the present invention relates to an embossing apparatus, particularly for paper in roll form for products of the "tissue” type, such as for example kitchen paper, toilet paper, et cetera.
  • Paper embossing machines for example for producing two-ply composite kitchen paper rolls, generally include an unreeling device which is suitable to feed with two plies of paper an embossing unit which may be provided with a system for pasting the two plies.
  • the embossing unit can include two embossing cylinders, each of which has a series of protrusions arranged in parallel rows and cooperates with a respective presser cylinder to emboss each sheet.
  • One of the two embossing cylinders can be coated with glue in order to paste the two sheets.
  • the protrusions of the embossing cylinders are produced by chip-forming, or by chemical processes for removing material, so that the sheets have a uniform series of dimples constituted by parallel lines of points directed inward, that is to say, on the facing sides of the sheets.
  • a knurling unit suitable to knurl the roll in order to join the two plies.
  • EP-0 498 623 and EP-0 313 766 disclose apparatuses for producing twice embossed films but do not address the above described problems.
  • An aim of the present invention is to provide an embossing machine which is suitable to provide even complex ornamental patterns on the finished product.
  • a further object of the invention is to provide a machine which is far cheaper to run, from the production point of view, than known systems for producing complex designs.
  • a further object is to provide a machine which is capable of producing ornamental patterns or designs which are more or less complicated according to the requirements and in a highly versatile manner, that is to say, with the possibility of varying the design quickly and cheaply.
  • an embossing apparatus generally designated by the reference numeral 1, includes a feeder 3 suitable to feed a first embossing unit 5.
  • the feeder is constituted, in the illustrated example, by a reel unwinder which is suitable to feed the first embossing unit with two plies of paper 7 and 9.
  • the first embossing unit includes a first embossing cylinder 11, with a corresponding rubber cylinder 13, and a second embossing cylinder 15, with a corresponding rubber cylinder 17.
  • there is a pasting device 19 which is suitable to spread glue on the cylinder 15 in order to paste the two plies 7 and 9.
  • the cylinder 31 is made of steel and engraved and is suitable to work by contrast with the cylinder 23, which is made of smooth steel.
  • the embossing cylinder 31 is made of very hard rubber and works by contrast with the cylinder 23, which is made of smooth steel.
  • the embossing cylinder 31 is made of steel and has a nickel or fiber-reinforced plastic jacket which is suitable to support a cliche made of very hard rubber, on which the design is formed by photoengraving, laser or other known methods.
  • the cylinder 31 works by contrast with the cylinder 23 made of steel.
  • This system has some important advantages: it is in fact possible to change the design on the paper in a very short time, because the jackets can be extracted in a cantilevered manner, without disassembling the cylinders.
  • photoengraving or laser methods it is also possible to provide designs with high definition much more simply and cheaply than the provision of designs by conventional machining.
  • the ribbon 21 is thus subjected to a second embossing, which is superimposed on the first embossing provided by the first embossing unit.
  • the head of the re-reeling machine may include a knurling device 29, which is optionally provided if, for example, the two plies are not pasted.
  • the machine according to the invention allows to provide complex designs and ornamental patterns. While the first embossing unit can provide a conventional geometrical 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 complex ornamental patterns by overlapping two separate embossings.
  • 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 cylinder; moreover, the second embossing unit can be easily bypassed if one wishes to emboss the paper in a conventional manner, with a simple design, due to production requirements.

Abstract

An embossing apparatus, for paper in roll form, includes a device (3) for feeding paper in roll form (7, 9) into a first embossing unit (5) constituted by at least one embossing cylinder which provides a first embossing on the paper. A second embossing unit (10), downstream of the first unit, provides a second embossing on the paper. <IMAGE>

Description

  • The present invention relates to an embossing apparatus, particularly for paper in roll form for products of the "tissue" type, such as for example kitchen paper, toilet paper, et cetera.
  • Paper embossing machines, for example for producing two-ply composite kitchen paper rolls, generally include an unreeling device which is suitable to feed with two plies of paper an embossing unit which may be provided with a system for pasting the two plies.
  • The embossing unit can include two embossing cylinders, each of which has a series of protrusions arranged in parallel rows and cooperates with a respective presser cylinder to emboss each sheet.
  • One of the two embossing cylinders can be coated with glue in order to paste the two sheets.
  • The protrusions of the embossing cylinders are produced by chip-forming, or by chemical processes for removing material, so that the sheets have a uniform series of dimples constituted by parallel lines of points directed inward, that is to say, on the facing sides of the sheets.
  • At the exit of the embossing unit, if gluing is not provided for, there is usually a knurling unit suitable to knurl the roll in order to join the two plies.
  • A currently strongly felt problem is the provision of complex designs by embossing. The techniques capable of producing complex designes that have been proposed so far are not only extremely onerous but also scarcely versatile. It is in fact necessary to replace the embossing cylinders with new cylinders which bear the new design even just to provide minimal variations of the design.
  • EP-0 498 623 and EP-0 313 766 disclose apparatuses for producing twice embossed films but do not address the above described problems.
  • The preamble of claims 1 and 2 is based on this prior art.
  • An aim of the present invention is to provide an embossing machine which is suitable to provide even complex ornamental patterns on the finished product.
  • A further object of the invention is to provide a machine which is far cheaper to run, from the production point of view, than known systems for producing complex designs.
  • A further object is to provide a machine which is capable of producing ornamental patterns or designs which are more or less complicated according to the requirements and in a highly versatile manner, that is to say, with the possibility of varying the design quickly and cheaply.
  • This aim, these objects and others which will become apparent hereinafter are achieved by an embossing apparatus according to claims 1 or 2.
  • Further characteristics and advantages will become apparent from the description of the embossing apparatus, illustrated only by way of non-limitative example in the accompanying drawing, which is a schematic lateral elevation view of the embossing machine according to the invention.
  • With reference to the figure, an embossing apparatus, generally designated by the reference numeral 1, includes a feeder 3 suitable to feed a first embossing unit 5. The feeder is constituted, in the illustrated example, by a reel unwinder which is suitable to feed the first embossing unit with two plies of paper 7 and 9. The first embossing unit includes a first embossing cylinder 11, with a corresponding rubber cylinder 13, and a second embossing cylinder 15, with a corresponding rubber cylinder 17. Optionally, there is a pasting device 19 which is suitable to spread glue on the cylinder 15 in order to paste the two plies 7 and 9.
  • A web of embossed paper 21 exits from the first embossing unit and, according to the invention, is passed through a second embossing unit 10 which is constituted by at least one embossing cylinder 31 which cooperates with a presser cylinder 23.
  • The cylinder 31 is made of steel and engraved and is suitable to work by contrast with the cylinder 23, which is made of smooth steel.
  • As an alternative, the embossing cylinder 31 is made of very hard rubber and works by contrast with the cylinder 23, which is made of smooth steel.
  • Advantageously, the embossing cylinder 31 is made of steel and has a nickel or fiber-reinforced plastic jacket which is suitable to support a cliche made of very hard rubber, on which the design is formed by photoengraving, laser or other known methods. The cylinder 31 works by contrast with the cylinder 23 made of steel.
  • This system has some important advantages: it is in fact possible to change the design on the paper in a very short time, because the jackets can be extracted in a cantilevered manner, without disassembling the cylinders. By photoengraving or laser methods, it is also possible to provide designs with high definition much more simply and cheaply than the provision of designs by conventional machining.
  • The ribbon 21 is thus subjected to a second embossing, which is superimposed on the first embossing provided by the first embossing unit. The web 25, which includes the second embossing and therefore the final design, exits from the second embossing unit and is fed to a re-reeling machine 27 in a per se known manner.
  • The head of the re-reeling machine may include a knurling device 29, which is optionally provided if, for example, the two plies are not pasted.
  • The machine according to the invention allows to provide complex designs and ornamental patterns. While the first embossing unit can provide a conventional geometrical 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 complex ornamental patterns by overlapping two separate embossings.
  • 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 cylinder; moreover, the second embossing unit can be easily bypassed if one wishes to emboss the paper in a conventional manner, with a simple design, due to production requirements.
  • In practice it has been observed that the invention achieves the intended aim and objects. The materials employed, as well as the dimensions, may of course be any according to the requirements and the state of the art.

Claims (4)

  1. Embossing apparatus, particularly for paper in roll form, comprising a device (3) for feeding paper in roll form (7, 9) into a first embossing unit (5) constituted by at least one embossing cylinder adapted to provide a first embossing on said paper, a second embossing unit (10), downstream of said first embossing unit, and adapted to provide a second embossing on said paper (21); characterized in that said second embossing unit comprises an engraved steel cylinder (31) working by contrast directly with the surface of a smooth steel cylinder (23).
  2. Embossing apparatus, particularly for paper in roll form, comprising a device (3) for feeding paper in roll form (7, 9) into a first embossing unit (5) constituted by at least one embossing cylinder adapted to provide a first embossing on said paper, a second embossing unit (10), downstream of said first embossing unit, and adapted to provide a second embossing on said paper (21); characterized in that said second embossing unit comprises an embossing cylinder (31) which is made of hard rubber working by contrast directly with the surface of a smooth steel cylinder (23).
  3. Embossing apparatus according to claim 2, characterized in that said embossing cylinder (31) supports a jacket provided with a cliché made of hard rubber, on which a design is provided.
  4. Embossing apparatus according to claim 2, characterized in that said embossing cylinder (31) supports a jacket provided with a relief plate made of hard rubber, on which a design is provided.
EP97110547A 1996-07-01 1997-06-27 Embossing apparatus particularly for paper in roll form Revoked EP0816058B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI960470U 1996-07-01
IT1996MI000470U IT240761Y1 (en) 1996-07-01 1996-07-01 EMBOSSING MACHINE, PARTICULARLY FOR ROLL PAPER

Publications (3)

Publication Number Publication Date
EP0816058A2 EP0816058A2 (en) 1998-01-07
EP0816058A3 EP0816058A3 (en) 1999-07-21
EP0816058B1 true EP0816058B1 (en) 2004-09-01

Family

ID=11373576

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97110547A Revoked EP0816058B1 (en) 1996-07-01 1997-06-27 Embossing apparatus particularly for paper in roll form

Country Status (5)

Country Link
EP (1) EP0816058B1 (en)
AT (1) ATE275037T1 (en)
DE (1) DE69730469T2 (en)
ES (1) ES2223070T3 (en)
IT (1) IT240761Y1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1313577B1 (en) * 1999-07-27 2002-09-09 Ind Cartarie Tronchetti Spa METHOD AND EQUIPMENT FOR EMBOSSING PAPER SHEETS IN ROLL.
US20150298420A1 (en) * 2012-11-16 2015-10-22 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

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4110152A (en) * 1975-06-20 1978-08-29 Avery International Corporation Embossing roller and method
US4003114A (en) * 1976-02-25 1977-01-18 Armstrong Cork Company Compressible sleeve embossing roll
EP0154141B1 (en) * 1984-02-20 1988-01-27 J. H. Benecke AG Method for producing an engraved roller for continuously embossing the surface of a thermoplastic sheet
US4859519A (en) * 1987-09-03 1989-08-22 Cabe Jr Alex W Method and apparatus for preparing textured apertured film
IT1230621B (en) * 1988-11-09 1991-10-28 Icaiplast S P A Vigevano Pavia DEVICE FOR RELIEF PRINTING OF SHEET OR STRIP MATERIALS
CA2060567C (en) * 1991-02-04 1997-06-10 Galyn Arlyn Schulz Apparatus for embossing a fibrous web

Also Published As

Publication number Publication date
IT240761Y1 (en) 2001-04-11
EP0816058A3 (en) 1999-07-21
ITMI960470U1 (en) 1998-01-01
ES2223070T3 (en) 2005-02-16
ITMI960470V0 (en) 1996-07-01
DE69730469T2 (en) 2005-09-15
EP0816058A2 (en) 1998-01-07
DE69730469D1 (en) 2004-10-07
ATE275037T1 (en) 2004-09-15

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