CA2201018A1 - Method for forming rollers, particularly embossing rollers for paper webs - Google Patents
Method for forming rollers, particularly embossing rollers for paper websInfo
- Publication number
- CA2201018A1 CA2201018A1 CA002201018A CA2201018A CA2201018A1 CA 2201018 A1 CA2201018 A1 CA 2201018A1 CA 002201018 A CA002201018 A CA 002201018A CA 2201018 A CA2201018 A CA 2201018A CA 2201018 A1 CA2201018 A1 CA 2201018A1
- Authority
- CA
- Canada
- 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.)
- Abandoned
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
- B31F2201/0717—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
Abstract
A method for forming rollers, particularly rollers for embossing paper webs, includes a first step of forming a series of protrusions and a second step of forming a pattern or design entailing the at least partial removal of a certain number of the protrusions.
Description
~20 1 0 1~
METHOD FOR ~ORMING ROLLERS, PARTICULARLY EMBOSSING ROLLERS
FOR PAPER WEBS
BACKGROUND OF THE INVENTION
1. Field of the invention 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.
METHOD FOR ~ORMING ROLLERS, PARTICULARLY EMBOSSING ROLLERS
FOR PAPER WEBS
BACKGROUND OF THE INVENTION
1. Field of the invention 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.
2. Description of the Prior Art 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.
22,J 1 '~ ~ 8 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 expenslve.
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.
SUMMARY OF THE INVENTION
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 220101~
, 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:
DESCRIPTION OF THE DRAWINGS
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.
DESCRIPTION OF A PREFERRED
EMBODIMENT OF 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 2~1JIUl~
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 comple~ 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.
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.
22,J 1 '~ ~ 8 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 expenslve.
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.
SUMMARY OF THE INVENTION
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 220101~
, 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:
DESCRIPTION OF THE DRAWINGS
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.
DESCRIPTION OF A PREFERRED
EMBODIMENT OF 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 2~1JIUl~
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 comple~ 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.
Claims (11)
1. 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 comprises the at least partial removal of a certain number of said protrusions.
2. Method according to claim 1, wherein said first step of forming said series of protrusions comprises a machining operation.
3. Method according to claim 1, wherein said first step of forming said series of protrusions comprises a chemical process.
4. Method according to claim 1, wherein said first step of forming said series of protrusions is followed by a finishing operation.
5. Method according to claim 1, wherein 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 claim 1, wherein 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 claim 5, wherein said numeric-control machine is a milling machine.
8. Roller for embossing paper webs, comprising 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, comprising 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, and patterns formed by regions in which said raised portions are not present.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITMI96A000592 | 1996-03-26 | ||
| IT96MI000592A IT1284433B1 (en) | 1996-03-26 | 1996-03-26 | PROCESS FOR FORMING CYLINDERS, ESPECIALLY FOR EMBOSSING PAPER TAPES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2201018A1 true CA2201018A1 (en) | 1997-09-26 |
Family
ID=11373774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002201018A Abandoned CA2201018A1 (en) | 1996-03-26 | 1997-03-25 | Method for forming rollers, particularly embossing rollers 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6524683B1 (en) | 1988-01-13 | 2003-02-25 | Georgia-Pacific France | Sheet of embossed absorbent paper, and a method and device for producing same |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| DE19957058A1 (en) | 1999-11-26 | 2001-05-31 | Focke & Co | Method and device for producing collars for folding boxes |
| US7036347B2 (en) | 2000-10-13 | 2006-05-02 | Boegli-Gravures Sa | Device for embossing and/or satin-finishing a flat material |
| DE50212788D1 (en) | 2001-03-26 | 2008-10-30 | Boegli Gravures Sa | DEVICE FOR TREATING FLAT MATERIAL |
| 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 |
Family Cites Families (8)
| 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 |
| CA1243233A (en) * | 1982-12-20 | 1988-10-18 | Robert N. Bauernfeind | Embossing process and product |
| JPH08985B2 (en) * | 1988-05-13 | 1996-01-10 | 日産自動車株式会社 | Mold surface treatment method |
| US5158523A (en) * | 1990-09-17 | 1992-10-27 | James River Corporation Of Virginia | Apparatus for enhanced emboss bonding of multi-ply tissue products |
| KR950701863A (en) * | 1992-06-12 | 1995-05-17 | 제이코버스 코넬리스 레이서 | Standard structural pattern rolls for use in paper renovation and paper remodeled by it (MODULAR CONSTRUCTION PATTERN ROLLS FOR USE IN PAPER CONVERTING AND PAPER CONVERTED THEREBY) |
-
1996
- 1996-03-26 IT IT96MI000592A patent/IT1284433B1/en active IP Right Grant
-
1997
- 1997-03-12 EP EP97104122A patent/EP0798106B1/en not_active Expired - Lifetime
- 1997-03-12 DK DK97104122T patent/DK0798106T3/en active
- 1997-03-12 AT AT97104122T patent/ATE193243T1/en not_active IP Right Cessation
- 1997-03-12 SI SI9730066T patent/SI0798106T1/en unknown
- 1997-03-12 DE DE69702088T patent/DE69702088T2/en not_active Expired - Lifetime
- 1997-03-12 ES ES97104122T patent/ES2147955T3/en not_active Expired - Lifetime
- 1997-03-12 PT PT97104122T patent/PT798106E/en unknown
- 1997-03-25 CN CN97104540A patent/CN1089676C/en not_active Expired - Fee Related
- 1997-03-25 CA CA002201018A patent/CA2201018A1/en not_active Abandoned
- 1997-03-25 JP JP9071956A patent/JPH1071526A/en active Pending
-
2000
- 2000-08-14 GR GR20000401878T patent/GR3034184T3/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6524683B1 (en) | 1988-01-13 | 2003-02-25 | Georgia-Pacific France | Sheet of embossed absorbent paper, and a method and device for producing same |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE193243T1 (en) | 2000-06-15 |
| ITMI960592A0 (en) | 1996-03-26 |
| CN1164467A (en) | 1997-11-12 |
| PT798106E (en) | 2000-10-31 |
| DE69702088D1 (en) | 2000-06-29 |
| GR3034184T3 (en) | 2000-11-30 |
| ES2147955T3 (en) | 2000-10-01 |
| ITMI960592A1 (en) | 1997-09-26 |
| CN1089676C (en) | 2002-08-28 |
| JPH1071526A (en) | 1998-03-17 |
| EP0798106B1 (en) | 2000-05-24 |
| EP0798106A1 (en) | 1997-10-01 |
| IT1284433B1 (en) | 1998-05-21 |
| SI0798106T1 (en) | 2000-10-31 |
| DE69702088T2 (en) | 2000-11-09 |
| DK0798106T3 (en) | 2000-09-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |