WO2014065730A1 - Unité de séparation et distributeur comprenant ladite unité de séparation - Google Patents

Unité de séparation et distributeur comprenant ladite unité de séparation Download PDF

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Publication number
WO2014065730A1
WO2014065730A1 PCT/SE2012/051159 SE2012051159W WO2014065730A1 WO 2014065730 A1 WO2014065730 A1 WO 2014065730A1 SE 2012051159 W SE2012051159 W SE 2012051159W WO 2014065730 A1 WO2014065730 A1 WO 2014065730A1
Authority
WO
WIPO (PCT)
Prior art keywords
separation unit
roller arrangement
protrusion elements
width direction
unit according
Prior art date
Application number
PCT/SE2012/051159
Other languages
English (en)
Inventor
Björn Larsson
Per Möller
Lars THORÉN
Jari HAUKIRAUMA
Stig Pommer
Joonas Jokitalo
Original Assignee
Sca Hygiene Products Ab
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 Sca Hygiene Products Ab filed Critical Sca Hygiene Products Ab
Priority to PCT/SE2012/051159 priority Critical patent/WO2014065730A1/fr
Publication of WO2014065730A1 publication Critical patent/WO2014065730A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K10/00—Body-drying implements; Toilet paper; Holders therefor
    • A47K10/24—Towel dispensers, e.g. for piled-up or folded textile towels; Toilet-paper dispensers; Dispensers for piled-up or folded textile towels provided or not with devices for taking-up soiled towels as far as not mechanically driven
    • A47K10/32—Dispensers for paper towels or toilet-paper
    • A47K10/42—Dispensers for paper towels or toilet-paper dispensing from a store of single sheets, e.g. stacked
    • A47K10/426—Dispensers for paper towels or toilet-paper dispensing from a store of single sheets, e.g. stacked dispensing from the front or sides of the dispenser
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K10/00—Body-drying implements; Toilet paper; Holders therefor
    • A47K10/24—Towel dispensers, e.g. for piled-up or folded textile towels; Toilet-paper dispensers; Dispensers for piled-up or folded textile towels provided or not with devices for taking-up soiled towels as far as not mechanically driven
    • A47K10/32—Dispensers for paper towels or toilet-paper
    • A47K10/42—Dispensers for paper towels or toilet-paper dispensing from a store of single sheets, e.g. stacked
    • A47K10/44—Dispensers for paper towels or toilet-paper dispensing from a store of single sheets, e.g. stacked with mechanical dispensing means for prehension of the next sheet to be dispensed

Definitions

  • the present invention concerns a separation unit for separating a perforated web material such as paper towels, tissue paper or nonwoven material along the perforation lines.
  • the present invention further relates to a dispenser for a web material, comprising a housing defining a web material reservoir, a dispensing opening, a control unit, and said separation unit.
  • the hands-free dispensers are electronically manoeuvred, they store and advance the paper towel with different kinds of control devices, sensors and power sources available. Without touching the dispenser, the user can get a paper towel that is fed automatically by the electronic dispenser. Dispensers like this are commonly used in public lavatories for dispensing paper towels to users.
  • the most common type of a powered, hands-free dispenser is a roll dispenser that uses sensors to initiate the mechanisms for advancing the towel such that the subsequent sheet is presented to the user.
  • Rolls of paper towels are often heavy and there is a friction and resistance for unrolling the paper. Especially when the roll is accelerated there is a high demand of energy.
  • the dispenser comprises an access opening to the pile, a dispensing opening for the web of towels, a feeding mechanism comprising a member for controlling the dispensing of the web of towels, and a drive unit.
  • Bundles of paper towels with connecting means therebetween are insertable through the access opening into the housing in the dispensing unit and may be added to the bottom of the pile.
  • the web of towels is dispensable from the upper part of the pile by the feeding mechanism, which positions the web of towels in a starting mode in the dispensing opening.
  • the folded web material comprises a double folded perforated web material, where two perforated webs are interfolded, such that the perforations are arranged in an off-set relationship to each other.
  • a separation unit enables the wipe products to be separated at the lines of weakness when the web is pulled by the user. This feature will allow the feeding of the products to be performed manually by the user, hence avoiding any additional arrangements of the dispensers such as electrical power.
  • the dispenser to realize the dispenser as described above a number of problems must be solved, including, separating the webs correctly along the perforation lines, feeding the next portion of the web to be separated to the separation unit, and presenting the leading end of the web to the next user.
  • separation shall be possible for different types of web materials and web materials having different lengths between the perforation lines.
  • GB 2 433 248 describes a dispenser for feeding a rolled material comprising two perforated webs, wherein the perforations are in offset relationship.
  • the dispenser comprises two profiled rollers being arranged to form a non-linear nip, applying pressure to the sheet material and so that the lines of weakness of the web material would burst.
  • the nip is formed by protrusion elements of different sizes arranged on two rollers. It is shown that the surfaces of each pair of opposing protrusion elements always in contact with each other.
  • W0 201 1/1149393 describes a dispenser for feeding a rolled tissue or nonwoven material, which may be provided with perforations.
  • a problem with perforated webs is defined, relating to the fact that the web tends to break at every perforation, but that the user might sometimes wish to use a long section of web and sometimes a short section of web.
  • For feeding the web in the dispenser there is provided a drive roller and an engaging roller.
  • the drive roller and the engaging roller are arranged such that an undulated passage is defined between the protrusion elements on the rollers. It is stated that the undulated passage ensures that the dispensing end from the web is in contact with both the drive roller and the engaging roller in the passage.
  • a pulling force exerted substantially straight out from the dispensing passage is distributed evenly over a central portion of the web, which results in that the web will not break even if perforated, until the user chooses to apply a force sideways. The separation is thus done by the user rather than by the dispenser itself.
  • a separation unit for separating a web material along preformed lines of weakness.
  • the separation unit has a width direction and comprises a first roller arrangement having a rotational axis extending in the width direction, and a web width extending in said width direction. It has second roller arrangement having a rotational axis extending parallel with the rotational axis of the first roller arrangement, and a web width extending in said width direction.
  • a web width of a roller arrangement is a portion of the roller arrangement extending along the width direction of the roller arrangement. Over the web width of the roller arrangement the web material is arranged to pass during dispensing of the web material.
  • the second roller arrangement is positioned at a distance from the first roller arrangement. The distance between the roller arrangements extends in a direction perpendicular to the width direction. The roller arrangements are thus positioned such that the rotational axes are juxtaposed.
  • Each of said first and said second roller arrangements is provided with a plurality of protrusion elements being arranged with a spacing along said first and second rotational axis and protruding radially perpendicular from said axes.
  • Each of said protrusion elements has a maximum width in said width direction, a maximum radial extension from a relevant first or second rotational axis, an inner portion adjacent to the relevant first or second rotational axis, and an outer portion remote from relevant first or second rotational axis.
  • maximum width is meant the maximal extension of the protrusion element in the width direction.
  • maximum radial extension is meant the distance from the rotational axis of the roller to the most remote point on the protrusion element in the radial direction being perpendicular to the width direction of the rotational axis.
  • the outer portions of the protrusion elements on said first roller arrangement are arranged in a staggered relationship with the outer portions of the protrusion elements on the second roller arrangement.
  • the roller arrangements and the protrusion elements are placed such that the protrusion elements on the first roller arrangement are positioned in between the protrusion elements on the second roller arrangement.
  • the outer portions of the protrusion elements on said first roller arrangement are partially overlapping with said outer portions of said protrusion elements on said second roller arrangement along an imaginary line extending in a width direction, whereby an undulating passage for a web material is formed between said roller arrangements such that the shape of the passage for a web material formed between the protrusion elements is meandering along the imaginary line.
  • the first and said second roller arrangements has a central portion and peripheral portions in said width direction, and wherein for said first roller arrangement said spacing between said protrusion elements is greater in said central portion than in said peripheral portions.
  • the radial overlap of the protrusion elements causes the preformed lines of weakness to break correctly and easily, thus allowing an accurate and smooth separation of the web material. Without wishing to be bound by a theory, the inventor believes that this effect is achieved due to the "wrinkling" of the web material in the passage.
  • the distribution of the protrusion elements wherein the spacing between said protrusion elements in the first roller arrangement is greater in said central portion than in said peripheral portions provides a wrinkleless portion of the web material in the central portion of the roller arrangement which is more suitable for gripping by the user when the web material is to be separated.
  • the web material mentioned above may in the context of the present invention be tissue paper, such as facial tissue, toilet tissue or paper towels, or may be nonwoven material.
  • the pinch force needed for accurate separation of the web material may need to be altered depending on the type of web material.
  • the distance between the rotational axes may be adjustable, thus enabling the radial overlap length in the undulating passage to be variable.
  • At least one of the roller arrangements may be biased against the other roller arrangement.
  • the roller arrangement may be biased by means of gravity, or alternatively by means of a spring.
  • Adjustable roller arrangements make it easier to load the web material between the roller arrangements and/or enables roller arrangements to yield or give way to seams in the web material, said seams being thicker than the web material itself. This feature of the separation unit makes it very flexible and adaptive.
  • roller arrangement is meant to comprise at least one axle, each axle having a rotational axis.
  • the roller arrangement further includes a plurality of protrusion elements arranged along the rotational axis.
  • the first roller arrangement may comprise only one axle extending in said width direction along said first rotational axis. However, the first roller arrangement may alternatively comprise two separate axles extending in said width direction along said first rotational axis.
  • the second roller arrangement may have spacing between the protrusion elements that is greater in said central portion than in said peripheral portions.
  • the second roller arrangement may comprise one axle, or alternatively two separate axles, extending in said width direction along said second rotational axis.
  • roller arrangements wherein at least one of the roller arrangements is separated into two peripheral parts, a left part and a right part, will further facilitate the access to a wrinkle- less portion of the web-material to the user.
  • the separation unit may contain more than two roller arrangements, i.e. three, four or more roller arrangements in one separation unit.
  • the radial overlap length is between 2-40 mm, preferably 2-20 mm, more preferably between 3-12 mm, or most preferably between 4-10 mm. It has been found that when the radial overlap length is in this range the preformed lines of weakness are correctly and easily broken, thus allowing an accurate and smooth separation of the web material. Without wishing to be bound by a theory, the inventor believes that this effect is achieved due to the "wrinkling" of the web material in the passage. This wrinkling causes local tension in the web material, which causes the material to burst as the preformed lines of weakness pass through the undulating passage.
  • the pinch force exercised by the separation unit of the present invention is strong enough to break the preformed lines of weakness, and at the same time weak enough not to damage the web material. Such an optimization of the pinch force is achieved due to the unique geometry of the separation unit.
  • the separation unit according to the present invention facilitates the separation of the web material such that the force needed for separation of the web material is minimized.
  • the protrusion elements of the separation unit according to the present invention may be of any suitable shape, as far as the radial overlap length is within the range specified above.
  • the protrusion elements may be in the form of disc elements, propeller- shaped elements, cylinder elements or the like.
  • the cross-section in a radial plane of the protrusion elements may be rounded at the outer periphery of the protrusion element.
  • the cross-section at the outer periphery of the protrusion element may also be rectangular, triangular, wavy or the like.
  • the maximum radial extensions of said protrusion elements may be between 5-50 mm, preferably 5-30 mm, more preferably 10-20 mm, or most preferably 12-18 mm.
  • maximum radial extension is meant the distance from the rotational axis of the roller arrangement to the most remote point on the protrusion element in the radial direction being perpendicular to the width direction of the rotational axis.
  • the protrusion elements may be made of any suitable material that provides friction between the outer portion of the protrusion element and the web material.
  • the protrusion elements may be made of rubber or another elastomeric material, such as e.g. a thermoplastic elastomer or a thermoplastic urethane.
  • the protrusion elements may be covered by a sleeve or ring of an elastomeric material encircling the outer periphery of each individual protrusion element.
  • the elastomeric material may be glued, vulcanized or simply stretched around the outer portion of the protrusion element.
  • the maximum widths of said protrusion elements may be between 4-20 mm, preferably 5- 10 mm, most preferably 6-8 mm.
  • the maximum width of each protrusion element is determined by the dimension of the widest part of the protrusion element.
  • the width of the protrusion element may be same or different along the radial direction. Thus, if the width of the protrusion element is the same along the radial direction, the maximum width within the overlap length is equal to the maximum width of the protrusion element. On the other hand, if the width of the protrusion element is different along the radial direction, the maximum width within the overlap length may be smaller or greater than the maximum width of the protrusion element.
  • the maximum radial extensions of the protrusion elements may be equal to or greater than the maximum widths of said protrusion elements. The more the difference between the maximum radial extensions and the maximum widths of the protrusion elements, the greater the undulation amplitude of the passage formed between the protrusion elements. This, in turn, means that with increasing undulation amplitude the pinch force increases.
  • the separation unit according to the present invention may be formed such that the protrusion elements are formed integral with the roller arrangements, or such that the protrusion elements are separate units attached to the roller arrangement.
  • the spacing of the protrusion elements may be the same along the width direction of the first and/or said second roller arrangement. Also, the spacing of the protrusion elements may vary along the width direction of the first and/or said second roller arrangement.
  • one of said first and said second roller arrangements may comprise at least a first, a second and a third protrusion element, wherein the spacing between said first and said second protrusion elements along the width direction of said first and/or said second roller arrangement differs from the spacing between said second and said third protrusion elements along the width direction of said first and/or said second roller arrangement.
  • the distance between the rotational axes of the first and second roller arrangements may be adjustable, thus enabling the radial overlap length in the undulating passage to be variable.
  • the roller arrangements may be arranged such that the distance between the roller arrangements is manually changed depending on the type of the web material.
  • the distance between the roller arrangements is automatically adjustable to provide an optimal separation.
  • Such an automatic adjustment may be enabled by using roller arrangements arranged with a spring suspension.
  • the distance between said rotational axes of said first and said second roller arrangements may be between 8-100 mm.
  • the distance between the rotational axes may be chosen such that an undulating passage providing an optimal pinch force is formed depending on the type of the web material.
  • the separation unit according to the present invention may comprise protrusion elements having the same maximum radial extensions and same maximum widths. In other words, all the protrusion elements may be equally sized.
  • the separation unit according to the present invention may comprise protrusion elements having different maximum radial extensions and/or different maximum widths, i.e. the separation unit comprises protrusion elements of different sizes.
  • a plurality of radial overlaps having different lengths will be formed for every given distance between the rotational axes. In this case, it is essential that the lengths of the radial overlaps formed between each two adjacent protrusion elements are in the range mentioned above.
  • the performance of the separation unit according to the present invention is improved when the spacing between each two protrusion elements is equal to or greater than the maximum width of each protrusion element.
  • Such a relationship between the spacing between the protrusion elements and the maximum widths of the protrusion elements provides for a scarce distribution of the protrusion elements along the rotational axes, which optimizes the pinch force affecting the web material, and facilitates separation of the web material at the desired position.
  • the sum of the maximum widths within the overlap length of all protrusion elements on that roller arrangement is between 5-30%, preferably between 12-20% of the web width of that roller.
  • maximum width within the overlap length is meant the maximal extension of the protrusion element in the width direction within the overlap length.
  • the separation unit according to the present invention may comprise protrusion elements wherein the maximum radial extensions of the protrusion elements are equal to or greater than said maximum widths of said protrusion elements. This means that the protrusion elements may be relatively large and thin, which contributes to an optimal pinch force of the web material.
  • the separation unit according to the present invention may be placed in a dispenser.
  • a dispenser may comprise a housing defining a web material reservoir, a dispensing opening, a control unit for determining a correct tension and path of the web material, and a separation unit according to the present invention.
  • the dispenser may further comprise a web material contained inside the housing.
  • the web material comprises preformed lines of weakness and may be Z-folded to form a stack, or being in the form of a roll.
  • a leading portion of the web material is configured to be supported in a dispensing path from the reservoir to the dispensing opening.
  • the leading portion may extend upwardly from the top of the said stack of said web material, or from the peripheral or central part of the roll.
  • the preformed lines of weakness may be perforation lines formed by alternating bonds and slots and having the perforation strength between 20-80 N/m, preferably 30-45 N/m measured using SS-EN ISO 12625-4:2005.
  • This perforation strength may for instance be achieved by using perforation lines wherein the total bond length/(the total bond length + total slot length) is between 2% and 10%, preferably between 4-7 %. It is desired to form perforation lines which are strong enough to enable feeding of the web material, but which are also weak enough to enable separation of the sheets along the perforation lines using the separation unit of the present invention.
  • other parameters may influence the strength of the perforation line, such as the paper quality, and the size, shape and distribution of the slots and bonds.
  • the above-mentioned measure is useful for guiding the person skilled in the art when selecting suitable perforation lines.
  • the web material may be a single web layer divided into sheet products between longitudinally separated preformed lines of weakness extending across said single web layer.
  • the dispenser may comprise a feeding mechanism, i.e. a motor to advance a web through the dispenser.
  • Figs. 1 a, 1 b, 1 c, 1d and 1 e show a separation unit according to the present invention
  • Fig. 2 shows the separation unit according to the present invention seen in the width direction;
  • Fig. 3 shows protrusion elements having different dimensions and differently shaped outer portions
  • Figs. 4 and 5 show a dispenser comprising the separation unit according to the present invention.
  • Figs. 1a and 1 b show a separation unit 1 according to the present invention.
  • the separation unit 1 comprises a first roller arrangement 2 and a second roller arrangement 3, each extending in a width direction and comprising plurality of protrusion elements 4 being spaced along the roller arrangements 2, 3 and protruding perpendicular from the roller arrangements 2, 3.
  • the roller arrangements 2, 3 are positioned at a distance di from each other, wherein the distance di is extending in a direction perpendicular to the width direction of the roller arrangements 2, 3.
  • the first roller arrangement 2 comprises six protrusion elements 4, and the second roller arrangement 3 comprises four protrusion elements 4.
  • the separation unit 1 has a web width W (Fig. 1c).
  • Each of the protrusion elements 4 has a maximum width w in the width direction and a maximum radial extension r from the roller arrangements 2, 3. In the embodiment shown in Fig. 1a, the maximum widths w and the maximum radial extensions r of all the protrusion elements 4 are the same.
  • Each protrusion element has an inner portion 6 adjacent to the roller arrangements 2, 3, and an outer portion 5 remote from the roller arrangements 2, 3, wherein the outer portions 5 of the protrusion elements 4 on the first roller arrangement 2 are arranged in a staggered relationship with the outer portions 5 of the protrusion elements 4 on the second roller arrangement 3.
  • the outer portions 5 of the protrusion elements 4 have a slightly curved shape.
  • the outer portions 5 of the protrusion elements 4 on the first roller arrangement 2 are partially overlapping with the outer portions 5 of the protrusion elements 4 on the second roller arrangement 3 with a radial overlap length L.
  • Such a configuration of the protrusion elements forms an undulating passage for a web material between the roller arrangements 2, 3.
  • the first roller arrangement 3 may comprise two separate axles extending in said width direction along said first rotational axis as seen in Fig. 1 d, or alternatively also the second rotational axis 2 may comprise two separate axles, extending in said width direction along said second rotational axis (see Fig. 1e).
  • the above solution wherein at least one of the rotational axis is separated into two separate axles, a left part and a right part, will further facilitate the access to a wrinkle-less portion of the web-material to the user.
  • the spacing d 2 between each two protrusion elements 4 is equal to or greater than the maximum width w of each protrusion element 4.
  • the maximum radial extensions r of the protrusion elements are equal to or greater than the maximum widths w of the protrusion elements.
  • the protrusion elements are formed as relatively large and thin discs, which optimize the pinch force.
  • Fig. 2 illustrates the separation unit 1 seen in the width direction. It is clearly shown that the outer portions 5 of the protrusion elements 4 on the first roller 2 overlap with the outer portions 5 of the protrusion elements 4 on the second roller arrangement 3.
  • the protrusion elements 4 may have different maximum widths w and maximum radial extension r.
  • protrusion elements having two different maximum widths w and two different maximum radial extensions r are shown.
  • shape of the outer portions 5 of the protrusion elements 4 may vary. In Fig. 3, some other possible shapes of the outer portions 5 are depicted.
  • the outer portions may have smooth surface, or may be provided with ribbed surface.
  • the surfaces of the outer 5 portions of the protrusion elements are ribbed, the friction between the web material and the outer surfaces of the protrusion elements, and thus the pinch force, is greater compared to the friction provided by smooth surfaces.
  • Fig. 4 schematically shows a dispenser 7 with a separation unit 1 according to the present invention.
  • the dispenser 7 has an outer front wall 8, two outer side walls 9 and a housing
  • the housing 10 is intended for holding a pile of a continuous length of accordion-like folded web of towels of tissue paper or nonwoven comprising bundles 12 of a continuous length of accordion-like folded web of towels of tissue paper or nonwoven.
  • the bundles 12 comprise connecting means 13 between the bundles 12.
  • the dispenser 7 comprises a guiding element 14 in the form of a curved plate which extends over a segment of the
  • the web 16 is arranged to be fed through the guiding element 14 when the dispenser 7 is in use, and at least one part of the guiding element 14 is arranged to bear against the web 16.
  • the guiding element 14 thereby holds the web 16 in place on the roller arrangement surface 15 so that it does not move backwards or sidewards during the use of the dispenser, or in case of web-breakage.
  • the unit subsequent to the guiding element 14 is separation unit 1 described above.
  • the separation unit 1 provides an optimal pinch force acting on the web material 16, and allows the web material 16 to be separated at the desired position.
  • the separation unit 1 depicted in Fig. 4 is configured such that both of the roller arrangements 2, 3 are positioned inside the housing 10. It is also conceivable that one of the rotational axes is
  • the dispenser 7 illustrated in Fig. 4 comprises a stack of interfolded webs 16, whereby the dispenser 7 is configured so that a preceding stack of interfolded webs in the housing 10 has to be lifted to position a new, succeeding stack in the housing 10 underneath the 30 preceding stack to refill the dispenser 7.
  • Stacks of interfolded webs in the dispenser 7 may be interconnected via connecting means 13, such as adhesive, adhesive tape or mechanical fasteners, such as hook and loop fasteners, at the bottom and/or top of each of the refill stacks.
  • the web 16 is arranged to be fed upwards within the housing 10, around the roller 15 located at the top of the dispenser 7 and downwards towards the separation unit 1 and the dispensing opening 17.
  • Fig. 5 the dispenser 7 is depicted in the state when no web material 16 is loaded.
  • the separation unit 1 is positioned within the housing 10 at the same level as the dispensing opening 17, such that the perforated web 16 is separated along the preformed lines of weakness at the moment of dispensing with almost no effort from the user's side.
  • the dispensing opening 17 is provided with a cut-in portion.
  • the cut-in portion is preferably located in the central portion of the dispensing opening, opposite to the protrusion-free centre portion of the roller arrangements 2 and 3, thereby providing the user with a wrinkleless portion of the web material 16 and improved access to the leading end of the web material 16.
  • the dispenser 7 may be any type of automatic or non-automatic dispenser for dispensing a web.
  • the dispenser 7 is a free-standing, but the dispenser may also be mounted on any suitable object in any suitable manner. Furthermore, a dispenser housing 10 of a dispenser according to the present invention need not necessarily contain an entire web 16 that is to be dispensed by the dispenser 7. The web 16 may for example be stored outside the housing 10 and merely be fed through the housing 10 when the dispenser 7 is in use.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Abstract

La présente invention concerne une unité de séparation servant à séparer un matériau en bande le long de lignes d'affaiblissement préformées. L'unité de séparation a une largeur et comprend un premier agencement de rouleaux ayant un axe de rotation s'étendant dans le sens de la largeur et une largeur de bande s'étendant dans ledit sens de la largeur, et un second agencement de rouleaux ayant un axe de rotation s'étendant parallèlement à l'axe de rotation du premier agencement de rouleaux et une largeur de bande s'étendant dans ledit sens de la largeur. Le second agencement de rouleaux est positionné à une certaine distance du premier agencement de rouleaux, la distance s'étendant dans un sens perpendiculaire au sens de la largeur. Le premier et le second agencement de rouleaux comportent chacun une pluralité d'éléments en saillie espacés le long des axes de rotation et faisant saillie perpendiculairement depuis les axes. Chacun des éléments en saillie présente une largeur maximale dans le sens de la largeur, une extension radiale maximale à partir des axes de rotation, une partie intérieure adjacente aux axes de rotation et une partie extérieure éloignée des axes de rotation. Les parties extérieures des éléments en saillie du premier agencement de rouleaux sont agencées de façon décalée par rapport aux parties extérieures des éléments en saillie du second agencement de rouleaux de façon que les parties extérieures des éléments en saillie du premier agencement de rouleaux chevauchent partiellement les parties extérieures des éléments en saillie du second agencement de rouleaux avec une longueur de chevauchement radial, formant ainsi un passage ondulé pour un matériau en bande entre lesdits rouleaux. Le premier et le second agencement de rouleaux présentent chacun une partie centrale et des parties périphériques dans ledit sens de la largeur. Pour le premier agencement de rouleaux, l'espacement entre les éléments en saillie est plus important dans la partie centrale que dans les parties périphériques.
PCT/SE2012/051159 2012-10-26 2012-10-26 Unité de séparation et distributeur comprenant ladite unité de séparation WO2014065730A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11484162B2 (en) 2017-09-01 2022-11-01 Essity Hygiene And Health Aktiebolag Separation unit and a dispenser comprising a separation unit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5061232A (en) * 1989-04-12 1991-10-29 Scott Paper Company Rolled paper embossing dispenser
US5375785A (en) * 1992-12-02 1994-12-27 Georgia-Pacific Corporation Automatic web transfer mechanism for flexible sheet dispenser
WO2011149393A1 (fr) * 2010-05-27 2011-12-01 Sca Hygiene Products Ab Distributeur de rouleau de mouchoir en papier absorbant ou de matériau non tissé
WO2012003867A1 (fr) * 2010-07-07 2012-01-12 Sca Hygiene Products Ab Appareil de distribution de produits en feuille absorbants

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5061232A (en) * 1989-04-12 1991-10-29 Scott Paper Company Rolled paper embossing dispenser
US5375785A (en) * 1992-12-02 1994-12-27 Georgia-Pacific Corporation Automatic web transfer mechanism for flexible sheet dispenser
WO2011149393A1 (fr) * 2010-05-27 2011-12-01 Sca Hygiene Products Ab Distributeur de rouleau de mouchoir en papier absorbant ou de matériau non tissé
WO2012003867A1 (fr) * 2010-07-07 2012-01-12 Sca Hygiene Products Ab Appareil de distribution de produits en feuille absorbants

Cited By (2)

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