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EP1702747A1 - Embossing device - Google Patents

Embossing device Download PDF

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Publication number
EP1702747A1
EP1702747A1 EP05425154A EP05425154A EP1702747A1 EP 1702747 A1 EP1702747 A1 EP 1702747A1 EP 05425154 A EP05425154 A EP 05425154A EP 05425154 A EP05425154 A EP 05425154A EP 1702747 A1 EP1702747 A1 EP 1702747A1
Authority
EP
European Patent Office
Prior art keywords
embossing
cylinder
cylinders
photoengraved
steel
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.)
Withdrawn
Application number
EP05425154A
Other languages
German (de)
French (fr)
Inventor
Giovanni Marsiletti
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.)
Sant'Andrea SpA
Original Assignee
Sant'Andrea 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 Sant'Andrea SpA filed Critical Sant'Andrea SpA
Priority to EP05425154A priority Critical patent/EP1702747A1/en
Publication of EP1702747A1 publication Critical patent/EP1702747A1/en
Withdrawn legal-status Critical Current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
    • B31F2201/0735—Pattern inclined with respect to the axis of the roller
    • 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
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0741—Roller cooperating with a non-even counter roller
    • B31F2201/0748—Roller cooperating with a non-even counter roller having a dissimilar 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
    • B31F2201/0776—Exchanging embossing tools

Definitions

  • the present invention relates to an embossing device comprising at least one pair of counter-rotating embossing cylinders.
  • Embossing is an operation whereby a raised or recessed pattern of signs or decorations is executed on paper, cardboard, leather, fabric, nonwoven fabric, plastic materials or other sheeted materials.
  • embossing operation modifies the surface of the material with designs or motifs that are decorative or serve the purpose of increasing the specific volume of the material. Embossing can also be used to provide consistency to fibre webs, e.g. veils of nonwoven material, or to join together two or more webs of paper or other material.
  • Known embossing devices can be classified according to the following three categories:
  • the steel -to- paper embossing system is the most widely used, in particular for embossing paper webs.
  • one of the two cylinders is made of steel and it has its surface engraved with the pattern to be reproduced on the material to be embossed.
  • the other cylinder is formed by paper or cardboard disks, pressed and compacted in such a way as to form a cylindrical body that initially has a smooth surface.
  • the outer surface of the paper cylinder is engraved by the steel cylinder in such a way as to form permanent recesses whose shape corresponds to the projections of the steel cylinder.
  • both cylinders are made of steel and have complementary reliefs and recesses.
  • the cylinder with the reliefs is obtained by mechanical machining and it is hardened.
  • This cylinder is used to engrave the female cylinder. After engraving, the female cylinder is hardened as well.
  • Microembossing systems use two steel embossing cylinders with identical reliefs mutually in phase, both obtained with mechanical machining processes.
  • the object of the present invention is to provide an embossing device that allows to change the embossing pattern at very low costs and in short times.
  • Figures 1 and 4 show a first embodiment of an embossing device according to the present invention.
  • the reference numbers 10 and 12 respectively designate two mutually co-operating embossing cylinders.
  • the embossing cylinders 10, 12 are mounted on respective mutually parallel counter-rotating shafts 14, 16.
  • the reference number 18 designates a sheet of material to be embossed which in use is made to pass between the two embossing cylinders 10, 12.
  • each of the two embossing cylinders 10, 12 comprises a magnetic cylinder 20, 22 whereon is applied a photoengraved plate 24, 26 bearing reliefs or recesses arranged according to the embossing pattern to be engraved on the sheet 18.
  • the plates 24, 26 are steel plates whose thickness is variable e.g. from 0.4 to 1.5 mm subjected to a photoengraving processes whereby the reliefs or the engravings are obtained on a first surface.
  • the other surface of the plates 24, 26 is smooth and it is set down on the outer surface of the respective magnetic cylinder 20, 22.
  • the plates 24, 26 are held on the respective magnetic cylinders 20, 22 exclusively by the magnetic force produced by the permanent magnetisation of the cylinders 20, 22.
  • the plate 24 is provided with projections 28 and the plate 26 is provided with recesses 30 arranged in phase with respect to the projections 28.
  • an embossing by drawing is obtained that is similar to the one obtained with known embossing device operating according to the steel -to- paper or steel -to- steel technique.
  • it is sufficient to replace the photoengraved plates 24, 26.
  • the cost for replacing the photoengraved plates is enormously lower than the cost for replacing the embossing cylinders.
  • the projections 28 and the recesses 30 have a rounded shape in order to avoid piercing or cutting the sheet 18.
  • each embossing cylinder 20, 22 comprises a magnetic cylinder whereon is wound a photoengraved plate 24, 26.
  • both photoengraved plates 24, 26 are provided with projections that are mutually in phase so that the sheeted material 18 is compressed between mutually opposite projections 32, 34 of the plates 24, 26.
  • the first embossing cylinder 10 comprises a magnetic cylinder 20 whereon is applied a photoengraved plate 24 provided with projections 36.
  • the second embossing cylinder 12 has a smooth outer surface.
  • the second embossing cylinder 12 can be a simple steel cylinder with smooth outer surface or it can be formed from a magnetic cylinder 22 whereon is applied a plate 26 with both its surfaces smooth.
  • the present invention can also be applied with a first embossing cylinder comprising a magnetic cylinder and a photoengraved plate applied on the magnetic cylinder and a second non magnetic embossing cylinder, e.g. made of yielding material (paper or the like).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)

Abstract

Embossing device comprising at least one pair of counter-rotating embossing cylinders (10, 12), wherein at least one of the embossing cylinders (10, 12) comprises a magnetic cylinder (20, 22) whereon is applied a photoengraved plate (24, 26) provided with reliefs and/or recesses defining the embossed pattern.

Description

  • The present invention relates to an embossing device comprising at least one pair of counter-rotating embossing cylinders.
  • Embossing is an operation whereby a raised or recessed pattern of signs or decorations is executed on paper, cardboard, leather, fabric, nonwoven fabric, plastic materials or other sheeted materials.
  • The embossing operation modifies the surface of the material with designs or motifs that are decorative or serve the purpose of increasing the specific volume of the material. Embossing can also be used to provide consistency to fibre webs, e.g. veils of nonwoven material, or to join together two or more webs of paper or other material.
  • Known embossing devices can be classified according to the following three categories:
    • steel -to- paper;
    • steel -to- steel;
    • microembossing.
  • The steel -to- paper embossing system is the most widely used, in particular for embossing paper webs. In embossing devices of this kind, one of the two cylinders is made of steel and it has its surface engraved with the pattern to be reproduced on the material to be embossed. The other cylinder is formed by paper or cardboard disks, pressed and compacted in such a way as to form a cylindrical body that initially has a smooth surface. The outer surface of the paper cylinder is engraved by the steel cylinder in such a way as to form permanent recesses whose shape corresponds to the projections of the steel cylinder.
  • In steel -to- steel embossing devices, both cylinders are made of steel and have complementary reliefs and recesses. The cylinder with the reliefs is obtained by mechanical machining and it is hardened. This cylinder is used to engrave the female cylinder. After engraving, the female cylinder is hardened as well.
  • Microembossing systems use two steel embossing cylinders with identical reliefs mutually in phase, both obtained with mechanical machining processes.
  • In all known embossing devices, changing the embossing pattern requires replacing the pair of embossing cylinders. The cost of a pair of embossing cylinders is extremely high, in particular in the case of steel -to- steel and microembossing devices, so changing the embossing pattern is a very costly operation, requiring a long time.
  • The object of the present invention is to provide an embossing device that allows to change the embossing pattern at very low costs and in short times.
  • According to the present invention, this object is achieved by an embossing device having the characteristics set out in the claims.
  • The present invention shall now be described in detail with reference to the accompanying drawings, provided purely by way of non limiting example, in which:
    • Figures 1 through 3 are perspective view showing three embodiments of embossing devices according to the present invention, and
    • Figures 4, 5 and 6 are enlarged schematic views of the parts indicated, respectively, in Figures IV, V and VI in Figures 1, 2 and 3.
  • Figures 1 and 4 show a first embodiment of an embossing device according to the present invention. In these figures, the reference numbers 10 and 12 respectively designate two mutually co-operating embossing cylinders. The embossing cylinders 10, 12 are mounted on respective mutually parallel counter-rotating shafts 14, 16. The reference number 18 designates a sheet of material to be embossed which in use is made to pass between the two embossing cylinders 10, 12.
  • According to the present invention, each of the two embossing cylinders 10, 12 comprises a magnetic cylinder 20, 22 whereon is applied a photoengraved plate 24, 26 bearing reliefs or recesses arranged according to the embossing pattern to be engraved on the sheet 18. The plates 24, 26 are steel plates whose thickness is variable e.g. from 0.4 to 1.5 mm subjected to a photoengraving processes whereby the reliefs or the engravings are obtained on a first surface. The other surface of the plates 24, 26 is smooth and it is set down on the outer surface of the respective magnetic cylinder 20, 22. The plates 24, 26 are held on the respective magnetic cylinders 20, 22 exclusively by the magnetic force produced by the permanent magnetisation of the cylinders 20, 22.
  • In the example illustrated in Figures 1 and 4, the plate 24 is provided with projections 28 and the plate 26 is provided with recesses 30 arranged in phase with respect to the projections 28. With this arrangement, an embossing by drawing is obtained that is similar to the one obtained with known embossing device operating according to the steel -to- paper or steel -to- steel technique. To modify the embossing pattern, it is sufficient to replace the photoengraved plates 24, 26. The cost for replacing the photoengraved plates is enormously lower than the cost for replacing the embossing cylinders. As schematically shown in Figure 4, the projections 28 and the recesses 30 have a rounded shape in order to avoid piercing or cutting the sheet 18.
  • Figures 2 and 5 show a variant of the present invention able to obtain a microembossing. The details corresponding to those described above are indicated by the same numeral references. In this case, as well, each embossing cylinder 20, 22 comprises a magnetic cylinder whereon is wound a photoengraved plate 24, 26. In this case, both photoengraved plates 24, 26 are provided with projections that are mutually in phase so that the sheeted material 18 is compressed between mutually opposite projections 32, 34 of the plates 24, 26.
  • In the third embodiment of the present invention, shown in Figures 3 and 6, the first embossing cylinder 10 comprises a magnetic cylinder 20 whereon is applied a photoengraved plate 24 provided with projections 36. The second embossing cylinder 12 has a smooth outer surface. The second embossing cylinder 12 can be a simple steel cylinder with smooth outer surface or it can be formed from a magnetic cylinder 22 whereon is applied a plate 26 with both its surfaces smooth.
  • The present invention can also be applied with a first embossing cylinder comprising a magnetic cylinder and a photoengraved plate applied on the magnetic cylinder and a second non magnetic embossing cylinder, e.g. made of yielding material (paper or the like).

Claims (5)

  1. Embossing device comprising at least one pair of counter-rotating embossing cylinders (10, 12), characterised in that at least one of said embossing cylinders (10, 12) comprises a magnetic cylinder (20, 22) whereon is applied a photoengraved plate (24, 26) provided with reliefs and/or recesses defining the embossing pattern.
  2. Embossing device as claimed in claim 1, characterised in that the first embossing cylinder (10) comprises a magnetic cylinder (20) whereon is applied a photoengraved plate (24) provided with reliefs (28) and that the second embossing cylinder (12) comprises a magnetic cylinder (22) whereon is applied a photoengraved plate (26) provided with recesses (30) arranged in phase with the reliefs (28) of the plate (24) of the first embossing cylinder (10) .
  3. Embossing device as claimed in claim 1, characterised in that the first and the second embossing cylinder (10, 12) comprise each a magnetic cylinder (20, 22) whereon is applied a respective photoengraved plate (24, 26), the two photoengraved plates (24, 26) being provided with projections (32, 34) in phase with each other.
  4. Embossing device as claimed in claim 1, characterised in that a first embossing cylinder (10) comprises a magnetic cylinder (20) whereon is applied a photoengraved plate (24) provided with reliefs (36) and that the second embossing cylinder (12) has a smooth outer surface.
  5. Embossing device as claimed in claim 1, characterised in that one of the two embossing cylinders is made of yielding material.
EP05425154A 2005-03-14 2005-03-14 Embossing device Withdrawn EP1702747A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05425154A EP1702747A1 (en) 2005-03-14 2005-03-14 Embossing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05425154A EP1702747A1 (en) 2005-03-14 2005-03-14 Embossing device

Publications (1)

Publication Number Publication Date
EP1702747A1 true EP1702747A1 (en) 2006-09-20

Family

ID=35295419

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05425154A Withdrawn EP1702747A1 (en) 2005-03-14 2005-03-14 Embossing device

Country Status (1)

Country Link
EP (1) EP1702747A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101863157A (en) * 2010-03-08 2010-10-20 云南恩典科技产业发展有限公司 Process for producing rotary embossing plate
ES2363680A1 (en) * 2011-02-24 2011-08-11 Lartec-J, S.L. Machine for the wrapping of capsules for cava bottles and similar (Machine-translation by Google Translate, not legally binding)
CN103350528A (en) * 2013-07-17 2013-10-16 浙江池河科技有限公司 Release paper for high-simulation leather and manufacturing method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3721189A (en) * 1971-06-28 1973-03-20 Magna Graphics Corp Magnetic print cylinder
US4116594A (en) * 1975-12-12 1978-09-26 Magna-Graphics Corporation Embossing apparatus having magnetic roller and flexible embossing plates therefor
FR2684598A1 (en) * 1991-12-09 1993-06-11 Kaysersberg Sa METHOD OF MANUFACTURING LAMINATED WAFFLE SHEETS. MACHINE FOR ITS IMPLEMENTATION.
WO2002072340A2 (en) * 2001-03-09 2002-09-19 Paper Converting Machine Company Embossing roll with removable plates
US6694873B1 (en) * 1999-06-18 2004-02-24 Holographic Label Converting, Inc. Microembosser for faster production of holographic labels

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3721189A (en) * 1971-06-28 1973-03-20 Magna Graphics Corp Magnetic print cylinder
US4116594A (en) * 1975-12-12 1978-09-26 Magna-Graphics Corporation Embossing apparatus having magnetic roller and flexible embossing plates therefor
FR2684598A1 (en) * 1991-12-09 1993-06-11 Kaysersberg Sa METHOD OF MANUFACTURING LAMINATED WAFFLE SHEETS. MACHINE FOR ITS IMPLEMENTATION.
US6694873B1 (en) * 1999-06-18 2004-02-24 Holographic Label Converting, Inc. Microembosser for faster production of holographic labels
WO2002072340A2 (en) * 2001-03-09 2002-09-19 Paper Converting Machine Company Embossing roll with removable plates

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101863157A (en) * 2010-03-08 2010-10-20 云南恩典科技产业发展有限公司 Process for producing rotary embossing plate
CN101863157B (en) * 2010-03-08 2011-09-28 云南恩典科技产业发展有限公司 Process for producing rotary embossing plate
ES2363680A1 (en) * 2011-02-24 2011-08-11 Lartec-J, S.L. Machine for the wrapping of capsules for cava bottles and similar (Machine-translation by Google Translate, not legally binding)
CN103350528A (en) * 2013-07-17 2013-10-16 浙江池河科技有限公司 Release paper for high-simulation leather and manufacturing method thereof

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