EP1344639A2 - Vorrichtung zum Prägen einer Bahn - Google Patents

Vorrichtung zum Prägen einer Bahn Download PDF

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Publication number
EP1344639A2
EP1344639A2 EP03445032A EP03445032A EP1344639A2 EP 1344639 A2 EP1344639 A2 EP 1344639A2 EP 03445032 A EP03445032 A EP 03445032A EP 03445032 A EP03445032 A EP 03445032A EP 1344639 A2 EP1344639 A2 EP 1344639A2
Authority
EP
European Patent Office
Prior art keywords
web
embossing
sledge
basic
path
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Withdrawn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
EP03445032A
Other languages
English (en)
French (fr)
Other versions
EP1344639A3 (de
Inventor
Gunnar Bredahl
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.)
Essity Germany GmbH
Original Assignee
SCA Hygiene Products GmbH
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
Priority claimed from SE0200757A external-priority patent/SE0200757D0/xx
Application filed by SCA Hygiene Products GmbH filed Critical SCA Hygiene Products GmbH
Publication of EP1344639A2 publication Critical patent/EP1344639A2/de
Publication of EP1344639A3 publication Critical patent/EP1344639A3/de
Withdrawn legal-status Critical Current

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    • 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
    • B31F2201/0702—Embossing by tools working discontinuously

Definitions

  • the invention concerns the embossing of a web of tissue paper moving at a constant basic speed in a basic web path. It further concerns an apparatus for performing an embossing of a web of tissue paper moving at a constant basic speed in a basic web path.
  • tissue for handkerchiefs and facials are important areas of paper use. These, to fulfill the demands from the customers need to be very soft and supple, with high surface softness and low bending resistance. To get these properties, the tissue sheet used must be very thin and thus have low strength, both in dry and wet condition. To get a tissue product that is strong enough it is customary to laminate two to four plies together, by dry or moist embossing or by gluing combined with embossing.
  • One method to emboss the web is to pass it between two rollers, one of which is a steel roller engraved with a pattern and the other a flat roller made of steel or hard rubber.
  • Another common method is to pass it between two patterned rollers, where the patterns are complimentary and arranged in register, so that one tip of the pattern from one roller will meet one tip of the pattern from the other roller, 'foot-to-foot' embossing.
  • Still another common method is to pass it between two patterned rollers, where the patterns are complimentary and arranged in register, so that one tip of the pattern from one roller will meet one depression of the pattern from the other roller, 'nested' embossing.
  • embossing marks that normally are created during the embossing process have more and more been used in a decorative way, to give the laminated tissue product a pleasing appearance. Different marks have been used; dots, straight lines, curved lines, depressed areas, etc.
  • a problem inherent in using a patterned roller for embossing is that the pressure in the nip point between the rollers will vary, depending on the actual area of the different parts of the pattern as seen in the line of contact between the patterned roller and the anvil roller. These parts will vary as the roller rotates, causing the actual point in compression to move along the roller, and sometimes also causing the roller into a type of vibrating movement. This can result in alternating areas of good and bad embossing stripes, cross over the web. This uneven embossing will effect the web strengths negatively.
  • embossing the tissue paper web between two plane embossing elements Preferably the embossing will create a pattern covering substantially all of the length of the web.
  • the solution involves passing the web through a storing and releasing unit, embossing the web between two substantially plane embossing elements as it passes through said storing and releasing unit, the speed of the web being substantially zero during the embossing operation.
  • the invention teaches turning the web from its basic path into said storing and releasing unit comprising a sledge means that is moved back and forth in a reciprocating movement substantially parallel to the main direction of the web path, such that at the embossing operation at the same time a length of web is stored at a first end of the sledge means and a corresponding length of web is released at a second end of the sledge means, and a turning means leading the web from the basic web path into the storing and releasing unit and back again to the basic web path, an embossing means, comprising two plane embossing elements, one of which is moved in a reciprocating movement to emboss the web with a pattern, where the web is led from its basic path onto the sledge means, through the embossing means, off the sledge means, and back to the basic web path, and the web is embossed by the embossing elements at a moment of time when the combined storing/releasing action of the sledge means
  • the invention provides an apparatus comprising an embossing unit comprising two substantially plane embossing elements, one of which is movable in a reciprocating movement to emboss the web, a storing and releasing unit for temporarily storing and releasing the web in such a way that the web speed through said embossing unit varies and at a certain moment of time is zero, a control system to synchronize the storing and releasing unit and the embossing unit.
  • the apparatus of the invention comprises an embossing unit comprising a sledge means that can be moved back and forth in a reciprocating movement substantially parallel to the main direction of the web movement, a sledge drive means to effect said sledge movement, an embossing means to emboss the web with a pattern, comprising two plane embossing elements, an embossing drive means to move one of said plane embossing elements of said embossing means in a reciprocating movement, a web guiding means to lead the web from its basic path into said embossing unit, onto the sledge means, through the embossing means, off the sledge means, and back to the web basic path.
  • the apparatus is adapted for leading a web through an embossing unit comprising a first turning roller, a sledge with a first sledge roller, a second sledge roller, a sledge girder system adapted to keep the sledge rollers at a specified distance from each other, and a second turning roller, a sledge drive means adapted to move the sledge in a reciprocating action back and forth substantially parallel to the main direction of the web, an embossing pad, and an embossing die with a die drive means adapted to move the embossing die in a reciprocating action substantially perpendicular to the web for embossing, where the web is led around the first turning roller, the first sledge roller, between the embossing pad and the embossing die, and then around the second sledge roller, and the second turning roller, and where the embossing operation is controlled to take place when the movement of the sledge negates the basic movement
  • the apparatus creates a pattern covering substantially the whole of the web.
  • the web to be embossed is led into the embossing unit 2 according to the invention around a first turning roller 3, turned around a first sledge roller 5, and after being led across an embossing pad 9 is turned back around a second sledge roller 6 and a second turning roller 8.
  • the embossing unit 2 can be installed into a segment of the basic web path existing in a paper converting plant.
  • the web is travelling to the first turning roller 3 and from the second turning roller 8 with the basic production speed controlled by reasons of capacity and product need. This speed can vary within limits depending upon the production capabilities of the production or converting line where the embossing unit 2 is placed.
  • the embossing is effected by an embossing die 10 that is moved in a reciprocating action perpendicular to the web 1 and the embossing pad 9.
  • the embossing pad 9 is a fixed plane anvil, normally unpatterned, but it can also have a pattern to fit the pattern of the embossing die 10, to make the web embossing effect two-sided.
  • the embossing pad 9 preferably is a steel or hard rubber plate that can be fastened on a fixture, to enable easy and fast exchange of pads.
  • the web path runs near to the embossing pad 9 and the web is embossed between the embossing die 10 and the embossing pad 9 as the die movement brings the die and pad together with a force adapted to effect an appropriate pressure.
  • the embossing die 10 is moved by actuating means (not shown).
  • the die is a plane patterned surface, of a material hard and strong enough to keep its pattern distinct during the embossing, like steel or ceramic.
  • the embossing die 10 preferably is a steel plate, which can be fastened on a fixture, to enable easy and fast exchange of dies.
  • the first sledge roller 5 and the second sledge roller 6 are end parts of a sledge 4 that can be moved back and forth in a reciprocating movement parallel to the main direction of the web movement.
  • the rollers are fastened and kept a defined distance apart by a sledge girder system 7.
  • the inner space of the sledge 4 preferably is open and devoid of obstacles to make room for the embossing pad 9, but it is also possible to let the girder system occupy the lower part of the inside space, if the embossing pad 9 has a low height demand.
  • the sledge girder system 7 is also equipped with driving means (not shown), that is controlled to let the sledge 4 be moved in a reciprocating movement according to a defined accelerating - decelerating sequence.
  • the sledge movement direction is parallel to the basic web movement with a forward direction in the basic web movement direction and a backward direction contrary to the basic web movement direction.
  • the aim of this programme is to be able to emboss the web between the embossing die and embossing pad when the web is not moving relatively to the embossing pad, which is necessary to get a good embossing and an undisturbed action.
  • the basic production speed of the web is called V
  • the local web speed in the vicinity of the embossing pad is related to V
  • the sledge speed is related to V, with a positive value for movement in the same forward direction as the basic production movement of the web, and a negative value for movement in the reverse direction.
  • Fig 2a shows the sledge at one of its direction turning points; the sledge speed is zero and the local web speed is the same as the basic web speed - the web is just travelling through the embossing unit.
  • Fig 2b shows the sledge accelerating in the reverse direction with speed getting higher; the local web speed is getting lower.
  • Fig 2c shows the sledge moving at a constant speed of one half of v in the reverse direction; the local web speed is now zero, as web is stored before and after the first sledge roller 5. At the same time web is released from before and after the second sledge roller 6, so the web will continue coming out from the embossing unit at the same basic speed.
  • Fig 2d shows the embossing die lifted again as the sledge is decelerating, still in reverse direction; the local web speed web is getting higher.
  • Fig 2e shows the sledge at the other of its direction turning points; the sledge speed is zero and the local web speed is the same as the basic web speed - the web is just travelling through the embossing unit.
  • Fig 2f shows the sledge accelerating in the forward direction with speed getting higher; the local web speed is also getting higher, now above the basic web speed.
  • Fig 2g shows the sledge moving at a speed of one half of v in the forward direction; The local web speed is now twice v.
  • Fig 2h shows the sledge decelerating, in forward direction; the web speed is getting lower. This continues until the sledge stops at its turning point, and the sequence starts over again as in Fig 2a.
  • Fig 3 shows graphically, at progressing points of time, corresponding to the points in Fig 2 a) - h), the relative speeds of the basic web, which is constant at v; of the sledge, which is alternating between negative (reverse) and positive (forwards) movement with a plateau at a reverse movement of -0,5 • v; of the local web, which is alternating between zero and 2 • v.
  • the sledge speed plateau will expand the time when the web is standing still relative to the embossing pad (the embossing window).
  • the accelerating - decelerating sequence preferably is a programme run by a computerized sequence control system.
  • the sledge driving means is controlled by the programme so that the movement of the sledge is able to follow an adjustable curve as the one shown in Fig 3. As the production speed v is changed, all values of the sledge movement curve need to be multiplied with a proportional factor.
  • the programme also controls the actuating means for the die movement.
  • the die must be brought into embossing contact at the correct point in time, ie when the local speed of the web is zero at the embossing plateau, and lifted again before the local web starts moving again.
  • Fig 4 An alternative way of arranging the embossing unit in spatial relationship to the basic web path can be seen in Fig 4.
  • a first distance turning roller 3a and a second distance turning roller 8a By including two extra turning rollers, a first distance turning roller 3a and a second distance turning roller 8a, the distance between the basic web path and the embossing unit can be varied freely.
  • the web segments from first turning roller 3 to first sledge roller 5 and from second sledge roller 6 to second turning roller 8 should be in a straight line.
  • the embossing method according to the invention permits the web to be embossed with a pattern covering substantially all its length. All types of patterns, which can cover the whole or part of the width, are possible to use, both sparse and dense patterns, with dots, straight or curved short or longer line segments, or filled areas.
  • the pattern can be adjusted to fit individual products, eg sheets of handkerchiefs, with an edge pattern and possibly also a patterned inner area.
  • An alternate way of arranging the embossing pad and die is to place the pad above the web and the die below the web. This can enable the embossing to be at the correct side of the web when it later is folded into a product.
  • embossing is to use two embossing dies which act together to emboss the web. This will shorten the distance travelled by an embossing die, enabling a higher embossing frequency.
  • the embossing method according to the invention can be used to emboss and/or laminate one or more plies of any flexible web material, as paper, tissue paper, and nonwoven.
  • the resulting length of the sledge unit is ⁇ 3,7 m.
EP03445032A 2002-03-12 2003-03-05 Vorrichtung zum Prägen einer Bahn Withdrawn EP1344639A3 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US36309302P 2002-03-12 2002-03-12
SE0200757 2002-03-12
US363093P 2002-03-12
SE0200757A SE0200757D0 (sv) 2002-03-12 2002-03-12 Web embossing unit

Publications (2)

Publication Number Publication Date
EP1344639A2 true EP1344639A2 (de) 2003-09-17
EP1344639A3 EP1344639A3 (de) 2004-04-28

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ID=27767291

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03445032A Withdrawn EP1344639A3 (de) 2002-03-12 2003-03-05 Vorrichtung zum Prägen einer Bahn

Country Status (1)

Country Link
EP (1) EP1344639A3 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015009696A1 (en) * 2013-07-19 2015-01-22 The Procter & Gamble Company Method for providing a localized dwell in an advancing web
GB2539385A (en) * 2015-06-02 2016-12-21 A B Graphic Int Ltd Apparatus and method for cutting, printing or embossing
US10537479B2 (en) 2016-09-15 2020-01-21 Curt G. Joa, Inc. Dual bonder
US10561539B2 (en) 2016-09-15 2020-02-18 Curt G. Joa, Inc. Dual bonder
US11192310B2 (en) 2019-07-11 2021-12-07 Curt G. Joa, Inc. Method and apparatus for improved ultrasonic bonding

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2523639A1 (de) * 1975-05-28 1976-12-09 Heinrich Hermann Fa Kombinierte druck- und stanzmaschine
EP0244348A1 (de) * 1986-04-29 1987-11-04 Karl Gronemeyer KG Stanzvorrichtung
US5109767A (en) * 1989-09-29 1992-05-05 Landis & Gyr Betriebs Ag Device for the embossing of fine structures
EP0652175A1 (de) * 1993-11-04 1995-05-10 The Procter & Gamble Company Verfahren und Vorrichtung zur Herstellung eines absorbierenden Artikels
US20010047582A1 (en) * 1996-09-20 2001-12-06 Gallagher Terence J. Apparatus and method for the continuous high speed rotary application of stamping foil

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2523639A1 (de) * 1975-05-28 1976-12-09 Heinrich Hermann Fa Kombinierte druck- und stanzmaschine
EP0244348A1 (de) * 1986-04-29 1987-11-04 Karl Gronemeyer KG Stanzvorrichtung
US5109767A (en) * 1989-09-29 1992-05-05 Landis & Gyr Betriebs Ag Device for the embossing of fine structures
EP0652175A1 (de) * 1993-11-04 1995-05-10 The Procter & Gamble Company Verfahren und Vorrichtung zur Herstellung eines absorbierenden Artikels
US20010047582A1 (en) * 1996-09-20 2001-12-06 Gallagher Terence J. Apparatus and method for the continuous high speed rotary application of stamping foil

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015009696A1 (en) * 2013-07-19 2015-01-22 The Procter & Gamble Company Method for providing a localized dwell in an advancing web
US9144624B2 (en) 2013-07-19 2015-09-29 The Procter & Gamble Company Method for providing a localized dwell in an advancing web
GB2539385A (en) * 2015-06-02 2016-12-21 A B Graphic Int Ltd Apparatus and method for cutting, printing or embossing
GB2539385B (en) * 2015-06-02 2017-05-03 A B Graphic Int Ltd Apparatus and method for cutting, printing or embossing
JP2018519189A (ja) * 2015-06-02 2018-07-19 エイビー グラフィック インターナショナル リミテッド 切断、印刷、又はエンボス加工するための装置及び方法
US10307982B2 (en) 2015-06-02 2019-06-04 Ab Graphic International Ltd Apparatus and method for cutting, printing or embossing
US10589487B2 (en) 2015-06-02 2020-03-17 Ab Graphic International Ltd Method for cutting, printing or embossing
US10537479B2 (en) 2016-09-15 2020-01-21 Curt G. Joa, Inc. Dual bonder
US10561539B2 (en) 2016-09-15 2020-02-18 Curt G. Joa, Inc. Dual bonder
US11000423B2 (en) 2016-09-15 2021-05-11 Curt G. Joa, Inc. Dual bonder
US11192310B2 (en) 2019-07-11 2021-12-07 Curt G. Joa, Inc. Method and apparatus for improved ultrasonic bonding

Also Published As

Publication number Publication date
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