EP2017205B1 - Method of manufacturing a roll that unwinds from the centre - Google Patents

Method of manufacturing a roll that unwinds from the centre Download PDF

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Publication number
EP2017205B1
EP2017205B1 EP08015903.1A EP08015903A EP2017205B1 EP 2017205 B1 EP2017205 B1 EP 2017205B1 EP 08015903 A EP08015903 A EP 08015903A EP 2017205 B1 EP2017205 B1 EP 2017205B1
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EP
European Patent Office
Prior art keywords
roll
sheet
winding
support
axis
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.)
Expired - Lifetime
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EP08015903.1A
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German (de)
French (fr)
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EP2017205A1 (en
Inventor
Yves-Michel Malecot
Joël HUNGLER
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Essity Operations France SAS
Original Assignee
SCA Tissue France SAS
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Application filed by SCA Tissue France SAS filed Critical SCA Tissue France SAS
Priority to ES08015903T priority Critical patent/ES2433382T3/en
Publication of EP2017205A1 publication Critical patent/EP2017205A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/28—Wound package of webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
    • B65H19/2276—The web roll being driven by a winding mechanism of the coreless type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
    • B65H19/28—Attaching the leading end of the web to the replacement web-roll core or spindle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/414—Winding
    • B65H2301/4148—Winding slitting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/414—Winding
    • B65H2301/4148—Winding slitting
    • B65H2301/41485—Winding slitting winding on one single shaft or support
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/30—Kinetic energy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/60—Optical characteristics, e.g. colour, light
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00—Problem to be solved or advantage achieved
    • B65H2601/30—Facilitating or easing
    • B65H2601/31—Facilitating or easing entities relating to handled material

Definitions

  • the invention relates to a roll of paper or other similar absorbent material such as a nonwoven, for example for wiping. It concerns in particular the field of products for sanitary or domestic use.
  • the rollers consist of a continuous sheet which comprises one or more plies, possibly pre-cut into consecutive coupons in the direction of the winding, and wound axially, preferably around an axis which may or may not support a mandrel; the roll can thus comprise a central mandrel or not.
  • the sheet may be unwound: either from the outer surface of the roll in the direction of the winding; either from the inside, from the center in a direction perpendicular to that of the roll winding. In the latter case, it is said that the roll is centrally rewind.
  • the present invention relates to the rollers that are used in central unwinding.
  • the roll When the roll has a mandrel, we must first extract it. In general, it has been designed so that it can be torn by pulling on its edge; most often at one end of the cardboard spiral spiral that forms it.
  • this solution is not always satisfactory, because the extraction of the mandrel is sometimes difficult if the fracture zone or areas are poorly formed.
  • this action can cause the first sheets of the roll which become difficult to use.
  • the first turns of the sheet being most often glued to the mandrel, they are unfit for any use and are a cause of waste.
  • This mandrel is particularly expensive to produce, since generally consists of two or more layers of cardboard bonded by bonding. It is also associated most often with a glue "hanging" of the first turn of the roller. It is no longer useful once removed, and becomes a waste.
  • reels to central unwinding without mandrel are in principle easier to implement by the user, because it is no longer necessary to remove the mandrel prior to their commissioning.
  • This technique presents constraints on the industrial level because it is necessary to add an extraction station of the mandrels to the winding line.
  • the sheet is cut in line in the longitudinal direction, before winding, from a large width sheet, and in as many strips as individual rolls to obtain.
  • the mother sheet is wound directly on a pin, also without the interposition of a mandrel.
  • the initial sheet which is large in width, is first rolled up to form a single coil with the final diameter of the individual roll, called "log" in the field. After forming the log, it is extracted from the spindle and then cut into individual rolls.
  • the sheet whether cellulose wadding, creped dry or wet, dry paper or a nonwoven, has some elasticity. Because of the internal stresses of the roll, due for example to the clamping of the sheet on the spindle during the winding and / or the tension of the sheet that generates the unwinding / winding operation by the machine, it can not be avoided normally. reducing the central hole by collapsing or collapsing in the center of the first turns after the pin has been removed. This collapse occurs, for example, after extraction of the spindle and / or at the time of cutting the log, by the pressure exerted by the saw.
  • the central hole is of small diameter and the first turns remain difficult to access. They come in a tight, helical, low "pitch" torch that is not conducive to easy use. If the diameter of the central hole is larger, it is difficult to avoid associating the first turns between them.
  • a bonding agent that is deposited directly on the sheet or indirectly via the spindle or one of the winding rolls, by a suitable system, at the time of winding the first turns on the spindle. Any other principle of association between them first turns, by mechanical process in particular, is applicable. We thus consolidate these first turns which together withstand the efforts of internal constraints.
  • the subject of the invention is therefore a mandrelless roll composed of a sheet of flexible material, such as a fibrous material absorbing a total grammage between 15 and 300 g / m 2 , preferably between 15 and 100 g / m 2 , formed by winding around a winding axis, which does not have the disadvantages reported above.
  • the absorbent material may be cellulose wadding, dry or wet creped, dry paper or nonwoven. It can be composed of one or more plies, associated or not, possibly pre-cut into coupons.
  • the material is in the dry state. It is not wet; in particular it is not impregnated with lotion or any other liquid.
  • the roll comprises a central unwinding primer forming a projection along said winding axis with respect to at least a portion of the plane of one of the sidewalls of the roll.
  • the primer may be on the axis or slightly offset relative to this axis.
  • the invention applies in particular to rollers whose winding is carried out under conditions of high tension of the sheet and clamping on the winding support, which make it possible to produce rolls with a strong film but which inevitably lead to the reduction of central hole.
  • the central unwinding primer consists of a portion of the inner end of the sheet, forming the individual roll.
  • the solution of the invention makes it possible to free oneself from all the problems related to the reduction of the central hole since one has access to the first sheet from outside the roll. Therefore, it is no longer necessary to bind the first turns together to try to maintain the hole formed. This avoids waste, both at the level of the production machine due to the absence of a system of association of the turns, than during the commissioning of the roll. We can therefore package the rolls in simple flexible packaging, including plastic.
  • this primer is formed by transversely folding a portion of the end of the sheet on the winding axis of the roller; it is preferably of tapered shape.
  • the roll is formed by winding the sheet on a winding support, the roll is extracted from the winding support, and a portion of the inner end of the sheet is slid out of the hole. left by the winding support to form said leader before any possible reduction of the central hole.
  • the roll represented on the figure 1 is, for example, a roll (R) of absorbent paper without mandrel which is used for wiping; either at home or in a workshop.
  • the paper is, for example, a two-ply cellulose wadding of 20 g / m 2 each, preferably associated.
  • the roll was obtained by winding a large sheet of 2600 mm width, on a spindle-shaped winding support for example circular section with a diameter of 10 to 80 mm. After forming a roll, designated "log" in the field, of 20 cm in diameter, for example, the spindle is extracted and led to a sawing station. The rolls thus produced are then packaged for shipping. The roll is shown after the walls of the central hole have collapsed in the central direction.
  • the hole (T) is reduced until it is completely flattened.
  • the inner end of the sheet must be released and slid into the dispensing orifice. It is understood that this operation is difficult in this case, because we must pull on the first turns to clear this end. This inevitably results in waste.
  • the figure 2 shows a roll (10 ') without mandrel obtained according to the invention.
  • the central hole is reduced as in the previous case of the prior art.
  • the commissioning of the roll is largely facilitated by the solution of the invention which consisted in forming a central unwinding primer (10B).
  • This primer is, according to the simplest embodiment, constituted by a portion of the inner end of the sheet forming the roller that is beforehand, before any collapse of the walls of the central hole, released, and setting protrusion with respect to one of the flanks of the roll.
  • This primer is formed after the roll has been made when the hole is still formed, ie just after cutting, in any case, preferably shortly afterwards.
  • this primer (10B) 0.3 to 20 cm long and preferably 1 cm to 15 cm, is formed of a portion of the inner end of the sheet, which is folded into the direction of the winding axis of the roll and is overflowed with respect to the sidewall.
  • This primer thus forms a tip gripping tail which is flexible at its end and can be easily folded against the side of the roll, to proceed to the conditioning of said rollers before transport.
  • the tip is handy and can be easily introduced into a dispenser.
  • the length of the primer is chosen in particular for the ease with which it can be grasped and with which it can be introduced into the extraction orifice of a dispenser.
  • the length of the primer corresponds to the distance between the end of the primer and the side of the roll.
  • the primer can be reinforced by a complementary element, for example staining.
  • the primer can be mechanically reinforced by a tongue, or any appropriate means, or additional element attached to the sheet and arranged to project on the axis of the roller.
  • the added element is then placed on the end of the sheet after separation of the rollers, projecting on one of the sides of the roll.
  • FIG. 3 to 6 the elements of a machine for producing the mandrel-free rolls of the invention are shown.
  • This machine is cut in line a large sheet (1) from a mother reel (3), before winding on a spindle (11).
  • the width of the sheet in the field of absorbent paper products is, for example, 2600 mm.
  • the sheet is cut in the longitudinal direction by means of blades (5) arranged in parallel, in a plurality of individual sheets (10) whose width corresponds to the width of the individual rolls that it is desired to obtain.
  • the cutting means may consist of a series of blades arranged vertically or discs cooperating with a support cylinder and cutting the sheet. Other means are known to those skilled in the art.
  • the sheets (10) are driven to a device comprising two cylinders (7 and 9) parallel and rotated by motor means not shown.
  • the two cylinders are slightly spaced from each other.
  • a pin (11) is brought into place by appropriate means.
  • the pin pinches the sheet against the cylinders (7 and 9), as seen on the figure 4 . It overlaps the space between these two contiguous drive cylinders.
  • the pin thus delimits on one side an end portion (10A) of the sheets (10).
  • the cylinders (7 and 9) are rotated. These rotate the spindle and the roller 13 on themselves allowing the winding of the sheet as seen on the figure 5 .
  • the pressure roller is raised and the spindle is moved with its rollers (10 ') to the next station where the individual sheets are cut, parallel to the winding axis, over any the width of the mother sheet, downstream of the rolls (7 and 9). Then, the pin is extracted from the assembly formed by the rollers (10 ').
  • the rollers comprise projecting on the axis, in other words overflowing with respect to one of the sidewalls of the roll, a central unwinding primer (10B).
  • the length of the protruding primer 10B depends directly on the length of the end portion 10A and the flap angle. This length 10B is preferably between 0.3 and 20 cm.
  • the invention can be implemented with any type of pin or winding support.
  • the profile and the diameter can be any, insofar as one can extract the pin once the formed rollers.
  • the spindle has a surface state with a suitable coefficient of friction, such that the addition of a lubricating agent turns out to be unnecessary.
  • the width of the sheet does not have to be a multiple of the number of cut sheets. We can advantageously wind the trim.
  • the roll of smaller width thus formed then serves as a buffer during the extraction of the spindle. He is then eliminated.
  • the present invention also makes it possible not to use a binding agent to keep the hole open after removal of the pin. Any reduction in the size of the central hole before packaging, or even during shocks and / or vibrations that would occur during transport, are not detrimental to the solution of the invention.
  • the primer (10B) gripping remains available to the end user.
  • the spindle is fed after the machine stops.
  • the present invention also applies of course to cases where the change of the spindle is performed without stopping the machine. In the field, such a machine is described as “continuous cycle” or “non-stop”.
  • the mother sheet is wound without slitting in line, to form a "log" to the width of the mother sheet on a spindle without mandrel.
  • the spindle is extracted and the log is cut with a saw.
  • a portion of the inner end of the sheet is then removed from the central hole.
  • one way to perform this operation is to introduce into the central hole a cylindrical piece of length and diameter less than this one.
  • This piece is provided with a means for gripping the end of the sheet. It may be for example a suction means.
  • the element (100) communicates with perforations (102) with a vacuum source.
  • the element (100) is introduced into the central hole and an aspiration is created by which the sheet is pressed against its wall.
  • the element is turned around its axis, while removing it from the hole; in combination, either before or after its extraction from the hole.
  • the end of the sheet is then driven out of the roll.
  • This exit portion of the roll is the unwinding leader (10B).
  • the extraction of said element is stopped when the length of the extracted sheet is considered sufficient.
  • the separation of said sheet of the cylindrical element is then performed by simply cutting the suction. If necessary, it can also be performed by blowing through these same perforations, or by any other appropriate means.

Abstract

The roll has a flexible material sheet formed by winding the sheet around a winding axis. A central unwinding section (10B) forms a protrusion along length of the axis with respect to a part of a plane of one of sides of the roll. The unwinding section has a portion belonging to an inner end of the sheet. The unwinding section is formed by folding transversely on the axis of the roll. An independent claim is also included for a roll manufacturing method.

Description

L'invention porte sur un rouleau de papier ou autre matériau absorbant semblable tel qu'un non-tissé, destiné par exemple à l'essuyage. Elle concerne en particulier le domaine des produits à usage sanitaire ou domestique.The invention relates to a roll of paper or other similar absorbent material such as a nonwoven, for example for wiping. It concerns in particular the field of products for sanitary or domestic use.

Pour ces applications, les rouleaux sont constitués d'une feuille continue qui comporte un ou plusieurs plis, éventuellement prédécoupée en coupons consécutifs dans la direction du bobinage, et enroulée axialement, préférentiellement autour d'un axe qui peut supporter ou non un mandrin ; le rouleau peut ainsi comprendre un mandrin central ou non. La feuille peut être dévidée : soit à partir de la surface externe du rouleau dans la direction du bobinage ; soit par l'intérieur, à partir du centre dans une direction perpendiculaire à celle du bobinage du rouleau. Dans ce dernier cas, on dit que le rouleau est à dévidage central.For these applications, the rollers consist of a continuous sheet which comprises one or more plies, possibly pre-cut into consecutive coupons in the direction of the winding, and wound axially, preferably around an axis which may or may not support a mandrel; the roll can thus comprise a central mandrel or not. The sheet may be unwound: either from the outer surface of the roll in the direction of the winding; either from the inside, from the center in a direction perpendicular to that of the roll winding. In the latter case, it is said that the roll is centrally rewind.

La présente invention a pour objet les rouleaux que l'on utilise en dévidage central.The present invention relates to the rollers that are used in central unwinding.

Quand le rouleau comporte un mandrin, on doit commencer par extraire celui-ci. En général, il a été conçu pour qu'on puisse le déchirer en tirant sur son bord ; le plus souvent, à l'une des extrémités de la spirale hélicoïdale en carton qui le forme. Cependant, la pratique montre que cette solution n'est pas toujours satisfaisante, car l'extraction du mandrin se révèle être parfois difficile si la ou les zones de rupture sont mal formées. De plus, cette action peut entraîner les premières feuilles du rouleau qui deviennent difficilement utilisables. En outre, les premières spires de la feuille étant le plus souvent collées au mandrin, elles sont impropres à toute utilisation et sont alors une cause de déchets.When the roll has a mandrel, we must first extract it. In general, it has been designed so that it can be torn by pulling on its edge; most often at one end of the cardboard spiral spiral that forms it. However, practice shows that this solution is not always satisfactory, because the extraction of the mandrel is sometimes difficult if the fracture zone or areas are poorly formed. In addition, this action can cause the first sheets of the roll which become difficult to use. In addition, the first turns of the sheet being most often glued to the mandrel, they are unfit for any use and are a cause of waste.

Ce mandrin est particulièrement coûteux à réaliser, puisque généralement composé de deux ou plusieurs couches de carton liées par collage. Il est associé également le plus souvent à une colle « d'accrochage » de la première spire du rouleau. Il n'est de plus d'aucune utilité une fois retiré, et devient donc un déchet.This mandrel is particularly expensive to produce, since generally consists of two or more layers of cardboard bonded by bonding. It is also associated most often with a glue "hanging" of the first turn of the roller. It is no longer useful once removed, and becomes a waste.

Pour pallier cet inconvénient, on propose aussi des bobines à dévidage central sans mandrin. Celles-ci sont à priori de mise en oeuvre plus facile par l'utilisateur, car il n'est plus nécessaire d'enlever le mandrin préalablement à leur mise en service. Pour réaliser celles-ci, on peut, en fabrication, prévoir un mandrin provisoire sur lequel on enroule la feuille. On retire ensuite le mandrin, avant le conditionnement des bobines. Cette technique présente des contraintes sur le plan industriel car il faut ajouter un poste d'extraction des mandrins à la ligne de bobinage.To overcome this drawback, we also propose reels to central unwinding without mandrel. These are in principle easier to implement by the user, because it is no longer necessary to remove the mandrel prior to their commissioning. To achieve these, one can, in manufacture, provide a temporary mandrel on which the sheet is wound. The mandrel is then removed before conditioning the coils. This technique presents constraints on the industrial level because it is necessary to add an extraction station of the mandrels to the winding line.

Selon un mode de fabrication sans mandrin, la feuille est découpée en ligne dans le sens longitudinal, avant bobinage, à partir d'une feuille mère de grande largeur, et en autant de bandes que de rouleaux individuels à obtenir.According to a chuckless method of manufacture, the sheet is cut in line in the longitudinal direction, before winding, from a large width sheet, and in as many strips as individual rolls to obtain.

Selon un autre mode de fabrication, on enroule directement la feuille mère sur une broche, également sans interposition de mandrin. La feuille initiale qui est de grande largeur, est d'abord enroulée de manière à former une bobine unique au diamètre définitif du rouleau individuel, appelé « log » dans le domaine. Après formation du log, on l'extrait de la broche et on le tronçonne ensuite en rouleaux individuels.According to another method of manufacture, the mother sheet is wound directly on a pin, also without the interposition of a mandrel. The initial sheet, which is large in width, is first rolled up to form a single coil with the final diameter of the individual roll, called "log" in the field. After forming the log, it is extracted from the spindle and then cut into individual rolls.

Cependant, la feuille, que ce soit de l'ouate de cellulose, crêpée sec ou humide, du papier voie sèche ou un non-tissé, présente une certaine élasticité. En raison des contraintes internes du rouleau, dues par exemple au serrage de la feuille sur la broche pendant le bobinage et/ou à la tension de la feuille que génère l'opération de déroulement/enroulement par la machine, on ne peut éviter normalement la réduction du trou central par l'affaissement ou l'effondrement au centre des premières spires après que l'on a retiré la broche. Cet effondrement se produit, par exemple, après extraction de la broche et/ou au moment de la coupe du log, par la pression exercée par la scie.However, the sheet, whether cellulose wadding, creped dry or wet, dry paper or a nonwoven, has some elasticity. Because of the internal stresses of the roll, due for example to the clamping of the sheet on the spindle during the winding and / or the tension of the sheet that generates the unwinding / winding operation by the machine, it can not be avoided normally. reducing the central hole by collapsing or collapsing in the center of the first turns after the pin has been removed. This collapse occurs, for example, after extraction of the spindle and / or at the time of cutting the log, by the pressure exerted by the saw.

En tout état de cause, on constate une réduction partielle ou totale du trou central au cours des manutentions et transport, en raison des chocs et/ou vibrations inévitables auxquels les rouleaux sont soumis.In any case, there is a partial or total reduction of the central hole during handling and transport, due to shocks and / or inevitable vibrations to which the rollers are subjected.

Lorsque le trou central est complètement réduit, il est difficile de le reformer au moins à la main, et la préhension de la première spire n'est pas aisée. Il s'ensuit inévitablement des déchets, notamment pour la mise en service du rouleau dans un distributeur, car on est amené alors à saisir plusieurs spires à la fois.When the central hole is completely reduced, it is difficult to reform at least by hand, and the grip of the first turn is not easy. It inevitably follows waste, especially for the commissioning of the roller in a dispenser, because it is then necessary to grasp several turns at a time.

On sait réaliser des rouleaux sans mandrin dont le trou central reste formé après extraction de la broche et/ou après coupe par une scie. On peut utiliser par exemple une broche dont le profil, cannelé ou polygonal, permet la formation d'un trou dont les parois sont auto-portantes. Un exemple de réalisation est illustré par le brevet FR 2 554 799 .It is known to produce mandrelless rollers whose central hole remains formed after extraction of the spindle and / or after cutting by a saw. One can use for example a pin whose profile, grooved or polygonal, allows the formation of a hole whose walls are self-supporting. An exemplary embodiment is illustrated by the patent FR 2,554,799 .

L'état de la technique le plus proche est représenté par le document US 5 746 379 .The closest state of the art is represented by the document US 5,746,379 .

Néanmoins, le trou central est de faible diamètre et les premières spires restent difficiles d'accès. Elles se présentent en une torche serrée, hélicoïdale à faible « pas », peu propice à une utilisation aisée. Si le diamètre du trou central est plus important, on peut difficilement éviter d'associer les premières spires entre elles. Pour cela on emploie un agent de liaison que l'on dépose directement sur la feuille ou indirectement via la broche ou un des cylindres de bobinage, par un système adapté, au moment de l'enroulement des premières spires sur la broche. Tout autre principe d'association entre elles des premières spires, par procédé mécanique notamment, est applicable. On consolide ainsi ces premières spires qui ensemble résistent aux efforts des contraintes internes.Nevertheless, the central hole is of small diameter and the first turns remain difficult to access. They come in a tight, helical, low "pitch" torch that is not conducive to easy use. If the diameter of the central hole is larger, it is difficult to avoid associating the first turns between them. For this we use a bonding agent that is deposited directly on the sheet or indirectly via the spindle or one of the winding rolls, by a suitable system, at the time of winding the first turns on the spindle. Any other principle of association between them first turns, by mechanical process in particular, is applicable. We thus consolidate these first turns which together withstand the efforts of internal constraints.

Cependant, là encore, on ne peut éviter les déchets lors de la mise en service d'un tel rouleau. Que ce soit dans le cas d'une utilisation directe ou dans le cas où l'on utilise ce rouleau dans un distributeur à dévidage central dans lequel on doit introduire l'extrémité de la feuille dans un orifice de distribution relativement étroit, on est obligé d'éliminer au préalable les premières spires associées entre elles.However, again, the waste can not be avoided during the commissioning of such a roll. Whether in the case of direct use or in the case where this roller is used in a center-fed dispenser in which the end of the sheet must be introduced into a relatively narrow dispensing orifice, one is obliged to to eliminate beforehand the first coils associated with each other.

Dans ce dernier type de réalisation également, on ne peut éviter que certains rouleaux ne soient choqués lors du transport, avec comme conséquence l'affaissement du trou central comme dans les cas mentionnés plus haut. Pour éviter ce risque, on prévoit d'ailleurs de conditionner préférentiellement les rouleaux dans des caisses en carton, contrairement aux rouleaux avec mandrin qui se suffisent d'une enveloppe souple en papier ou en matière plastique. Le coût s'en trouve considérablement augmenté.In this latter type of embodiment also, it can not be avoided that some rollers are shocked during transport, with the result that the central hole collapses as in the cases mentioned above. To avoid this risk, it is also expected to preferentially condition the rolls in cardboard boxes, unlike rollers with mandrel that are sufficient of a flexible envelope of paper or plastic. The cost is considerably increased.

L'intérêt que l'on pouvait trouver à ces rouleaux sans mandrin par rapport aux rouleaux avec mandrin en est ainsi fortement diminué.The interest that could be found in these mandrel-free rolls compared to mandrel rollers is thus greatly reduced.

L'invention a donc pour objet un rouleau sans mandrin composé d'une feuille de matériau souple, tel qu'un matériau fibreux absorbant d'un grammage total compris entre 15 et 300 g/m2, préférentiellement entre 15 et 100 g/m2, formé par enroulement autour d'un axe de bobinage, qui ne présente pas les inconvénients rapportés ci-dessus.The subject of the invention is therefore a mandrelless roll composed of a sheet of flexible material, such as a fibrous material absorbing a total grammage between 15 and 300 g / m 2 , preferably between 15 and 100 g / m 2 , formed by winding around a winding axis, which does not have the disadvantages reported above.

Le matériau absorbant peut être une ouate de cellulose, crêpée sec ou humide, un papier voie sèche ou un non-tissé. Il peut être composé d'un ou de plusieurs plis, associés ou non, éventuellement prédécoupés en coupons.The absorbent material may be cellulose wadding, dry or wet creped, dry paper or nonwoven. It can be composed of one or more plies, associated or not, possibly pre-cut into coupons.

Le matériau est à l'état sec. Il n'est pas humide ; en particulier il n'est pas imprégné de lotion ou de tout autre liquide.The material is in the dry state. It is not wet; in particular it is not impregnated with lotion or any other liquid.

Le rouleau est comprend une amorce de dévidage central formant une saillie le long dudit axe de bobinage par rapport à au moins une partie du plan de l'un des flancs du rouleau. L'amorce peut être sur l'axe ou légèrement décalée par rapport à cet axe.The roll comprises a central unwinding primer forming a projection along said winding axis with respect to at least a portion of the plane of one of the sidewalls of the roll. The primer may be on the axis or slightly offset relative to this axis.

L'invention s'applique en particulier aux rouleaux dont le bobinage est réalisé dans des conditions de forte tension de la feuille et de serrage sur le support de bobinage, qui permettent de produire des rouleaux à fort métrage mais qui conduisent inévitablement à la réduction du trou central.The invention applies in particular to rollers whose winding is carried out under conditions of high tension of the sheet and clamping on the winding support, which make it possible to produce rolls with a strong film but which inevitably lead to the reduction of central hole.

L'amorce de dévidage central est constituée d'une portion de l'extrémité interne de la feuille, formant le rouleau individuel.The central unwinding primer consists of a portion of the inner end of the sheet, forming the individual roll.

La solution de l'invention permet de se libérer de tous les problèmes liés à la réduction du trou central puisqu'on a accès à la première feuille depuis l'extérieur du rouleau. De ce fait, il n'est plus nécessaire de lier les premières spires entre elles pour essayer de maintenir le trou formé. On évite ainsi les déchets, tant au niveau de la machine de production en raison de l'absence de système d'association des spires, que lors de la mise en service du rouleau. On peut donc conditionner les rouleaux dans de simples emballages souples, notamment plastiques.The solution of the invention makes it possible to free oneself from all the problems related to the reduction of the central hole since one has access to the first sheet from outside the roll. Therefore, it is no longer necessary to bind the first turns together to try to maintain the hole formed. This avoids waste, both at the level of the production machine due to the absence of a system of association of the turns, than during the commissioning of the roll. We can therefore package the rolls in simple flexible packaging, including plastic.

En particulier, cette amorce est formée par rabattement transversal d'une portion de l'extrémité de la feuille sur l'axe de bobinage du rouleau ; elle est préférentiellement de forme effilée. On a alors l'avantage supplémentaire de faciliter l'introduction de l'extrémité de l'amorce dans le dispositif de distribution d'un distributeur à dévidage central, par exemple.In particular, this primer is formed by transversely folding a portion of the end of the sheet on the winding axis of the roller; it is preferably of tapered shape. There is then the additional advantage of facilitating the introduction of the end of the primer into the dispensing device of a center-fed dispenser, for example.

Selon l'invention, on forme le rouleau par enroulement de la feuille sur un support de bobinage, on extrait le rouleau du support de bobinage, et on fait glisser une portion de l'extrémité interne de la feuille en dehors du trou laissé par le support de bobinage pour former ladite amorce avant toute éventuelle réduction du trou central.According to the invention, the roll is formed by winding the sheet on a winding support, the roll is extracted from the winding support, and a portion of the inner end of the sheet is slid out of the hole. left by the winding support to form said leader before any possible reduction of the central hole.

On va maintenant décrire l'invention plus en détail en référence aux dessins joints en annexe sur lesquels :

  • la figure 1 représente un rouleau sans mandrin de l'art antérieur dont le trou central est réduit,
  • la figure 2 représente un rouleau réalisé par le procédé de l'invention avec une amorce de dévidage central faisant saillie le long de l'axe par rapport à l'un des flancs du rouleau,
  • les figures 3 à 5 représentent schématiquement, en vue de profil, la progression d'une feuille dans une machine permettant de réaliser des rouleaux sans mandrin,
  • la figure 6 représente un mode de réalisation des rouleaux conformément à l'invention,
The invention will now be described in more detail with reference to the appended drawings in which:
  • the figure 1 represents a mandrelless roll of the prior art whose central hole is reduced,
  • the figure 2 represents a roll made by the method of the invention with a central unwinding primer projecting along the axis with respect to one of the sides of the roll,
  • the Figures 3 to 5 schematically represent, in profile view, the progression of a sheet in a machine making it possible to produce rolls without a mandrel,
  • the figure 6 represents an embodiment of the rollers according to the invention,

Le rouleau représenté sur la figure 1, est par exemple un rouleau (R) de papier absorbant sans mandrin que l'on utilise pour l'essuyage ; soit à la maison, soit dans un atelier. A titre d'illustration, le papier est par exemple une ouate de cellulose à deux plis de 20 g/m2 chacun, préférentiellement associés. Le rouleau a été obtenu par enroulement d'une large feuille de 2600 mm de laize, sur un support de bobinage en forme de broche par exemple à section circulaire de diamètre de 10 à 80 mm. Après formation d'un rouleau, désigné « log » dans le domaine, de 20 cm de diamètre par exemple, on en extrait la broche et on le conduit à une station de sciage. Les rouleaux ainsi réalisés sont ensuite conditionnés pour l'expédition. On a représenté le rouleau après que les parois du trou central se sont effondrées dans la direction centrale. Le trou (T) est réduit jusqu'à se retrouver complètement aplati. Lors de la mise en service du rouleau dans un distributeur à dévidage central, on doit libérer l'extrémité interne de la feuille et la glisser dans l'orifice de distribution. On comprend que cette opération soit malaisée dans ce cas, car on doit tirer sur les premières spires pour dégager cette extrémité. Il en résulte inévitablement des déchets.The roll represented on the figure 1 is, for example, a roll (R) of absorbent paper without mandrel which is used for wiping; either at home or in a workshop. By way of illustration, the paper is, for example, a two-ply cellulose wadding of 20 g / m 2 each, preferably associated. The roll was obtained by winding a large sheet of 2600 mm width, on a spindle-shaped winding support for example circular section with a diameter of 10 to 80 mm. After forming a roll, designated "log" in the field, of 20 cm in diameter, for example, the spindle is extracted and led to a sawing station. The rolls thus produced are then packaged for shipping. The roll is shown after the walls of the central hole have collapsed in the central direction. The hole (T) is reduced until it is completely flattened. When commissioning the roller in a center-fed dispenser, the inner end of the sheet must be released and slid into the dispensing orifice. It is understood that this operation is difficult in this case, because we must pull on the first turns to clear this end. This inevitably results in waste.

La figure 2 montre un rouleau (10') sans mandrin obtenu selon l'invention. Le trou central est réduit comme dans le cas précédent de l'art antérieur. Cependant la mise en service du rouleau est largement facilitée par la solution de l'invention qui a consisté à former une amorce (10B) de dévidage central. Cette amorce est, selon le mode de réalisation le plus simple, constituée par une portion de l'extrémité interne de la feuille formant le rouleau que l'on a au préalable, avant tout affaissement des parois du trou central, libérée, et mise en saillie par rapport à l'un des flancs du rouleau. On forme cette amorce, après réalisation du rouleau quand le trou est encore formé, c'est à dire juste après la coupe, en tout état de cause, de préférence peu de temps après.The figure 2 shows a roll (10 ') without mandrel obtained according to the invention. The central hole is reduced as in the previous case of the prior art. However, the commissioning of the roll is largely facilitated by the solution of the invention which consisted in forming a central unwinding primer (10B). This primer is, according to the simplest embodiment, constituted by a portion of the inner end of the sheet forming the roller that is beforehand, before any collapse of the walls of the central hole, released, and setting protrusion with respect to one of the flanks of the roll. This primer is formed after the roll has been made when the hole is still formed, ie just after cutting, in any case, preferably shortly afterwards.

Avantageusement, cette amorce (10B), de 0,3 à 20 cm de long et de préférence de 1 cm à 15 cm, est formée d'une portion de l'extrémité interne de la feuille, que l'on a rabattue dans la direction de l'axe de bobinage du rouleau et fait déborder par rapport au flanc. Cette amorce forme ainsi une queue de préhension en pointe qui est souple à son extrémité et que l'on peut aisément rabattre contre le flanc du rouleau, pour procéder au conditionnement desdits rouleaux avant transport. En outre la pointe est maniable et peut être introduite aisément dans un distributeur. La longueur de l'amorce est choisie en particulier pour la facilité avec laquelle elle peut être saisie et avec laquelle elle peut être introduite dans l'orifice d'extraction d'un distributeur. La longueur de l'amorce correspond à la distance entre l'extrémité de l'amorce et le flanc du rouleau.Advantageously, this primer (10B), 0.3 to 20 cm long and preferably 1 cm to 15 cm, is formed of a portion of the inner end of the sheet, which is folded into the direction of the winding axis of the roll and is overflowed with respect to the sidewall. This primer thus forms a tip gripping tail which is flexible at its end and can be easily folded against the side of the roll, to proceed to the conditioning of said rollers before transport. In addition the tip is handy and can be easily introduced into a dispenser. The length of the primer is chosen in particular for the ease with which it can be grasped and with which it can be introduced into the extraction orifice of a dispenser. The length of the primer corresponds to the distance between the end of the primer and the side of the roll.

L'amorce peut être renforcée par un élément complémentaire, coloration par exemple.The primer can be reinforced by a complementary element, for example staining.

Selon un mode de réalisation non représenté, l'amorce peut être renforcée mécaniquement par une languette, ou tout moyen approprié, ou élément supplémentaire rapporté sur la feuille et agencé pour être en saillie sur l'axe du rouleau.According to an embodiment not shown, the primer can be mechanically reinforced by a tongue, or any appropriate means, or additional element attached to the sheet and arranged to project on the axis of the roller.

L'élément rajouté est alors disposé sur l'extrémité de la feuille après séparation des rouleaux, en saillie sur l'un des flancs du rouleau.The added element is then placed on the end of the sheet after separation of the rollers, projecting on one of the sides of the roll.

On décrit maintenant un premier mode de fabrication des rouleaux.A first method of manufacturing rolls is now described.

Sur les figures 3 à 6, on a représenté les éléments d'une machine permettant de réaliser les rouleaux sans mandrin de l'invention. Avec cette machine, on découpe en ligne une large feuille (1) issue d'une bobine mère (3), avant enroulement sur une broche (11). La largeur de la feuille dans le domaine des produits en papier absorbant est par exemple de 2600 mm. La feuille est coupée dans le sens longitudinal au moyen de lames (5) disposées en parallèle, en une pluralité de feuilles individuelles (10) dont la largeur correspond à la largeur des rouleaux individuels que l'on souhaite obtenir. Le moyen de coupe peut être constitué d'une série de lames disposées verticalement ou bien des disques coopérant avec un cylindre support et coupant la feuille. D'autres moyens sont connus de l'homme du métier.On the Figures 3 to 6 the elements of a machine for producing the mandrel-free rolls of the invention are shown. With this machine, is cut in line a large sheet (1) from a mother reel (3), before winding on a spindle (11). The width of the sheet in the field of absorbent paper products is, for example, 2600 mm. The sheet is cut in the longitudinal direction by means of blades (5) arranged in parallel, in a plurality of individual sheets (10) whose width corresponds to the width of the individual rolls that it is desired to obtain. The cutting means may consist of a series of blades arranged vertically or discs cooperating with a support cylinder and cutting the sheet. Other means are known to those skilled in the art.

Les feuilles (10) sont entraînées vers un dispositif comportant deux cylindres (7 et 9) parallèles et entraînés en rotation par des moyens moteurs non représentés. Les deux cylindres sont légèrement espacés l'un de l'autre. Une fois les feuilles (10) dans la position de la figure 3, on amène en place une broche (11) par des moyens appropriés. La broche vient pincer la feuille contre les cylindres (7 et 9), comme on le voit sur la figure 4. Elle chevauche l'espace ménagé entre ces deux cylindres d'entraînement contigus. La broche délimite ainsi d'un côté une portion d'extrémité (10A) des feuilles (10). Une fois les différents organes en position, on entraîne les cylindres (7 et 9) en rotation. Ceux-ci font tourner la broche et le rouleau 13 sur eux-mêmes permettant l'enroulement de la feuille comme on le voit sur la figure 5.The sheets (10) are driven to a device comprising two cylinders (7 and 9) parallel and rotated by motor means not shown. The two cylinders are slightly spaced from each other. Once the leaves (10) in the position of the figure 3 a pin (11) is brought into place by appropriate means. The pin pinches the sheet against the cylinders (7 and 9), as seen on the figure 4 . It overlaps the space between these two contiguous drive cylinders. The pin thus delimits on one side an end portion (10A) of the sheets (10). Once the various members in position, the cylinders (7 and 9) are rotated. These rotate the spindle and the roller 13 on themselves allowing the winding of the sheet as seen on the figure 5 .

Lorsque l'étape d'enroulement est terminée, on relève le rouleau presseur et on déplace la broche avec ses rouleaux (10') jusqu'à la station suivante où on coupe les feuilles individuelles, parallèlement à l'axe de bobinage, sur toute la largeur de la feuille mère, en aval des cylindres (7 et 9). Puis, on extrait la broche de l'ensemble formé par les rouleaux (10').When the winding step is completed, the pressure roller is raised and the spindle is moved with its rollers (10 ') to the next station where the individual sheets are cut, parallel to the winding axis, over any the width of the mother sheet, downstream of the rolls (7 and 9). Then, the pin is extracted from the assembly formed by the rollers (10 ').

Conformément à l'invention, les rouleaux comportent en saillie sur l'axe, autrement dit en débordement par rapport à l'un des flancs du rouleau, une amorce (10B) de dévidage central.According to the invention, the rollers comprise projecting on the axis, in other words overflowing with respect to one of the sidewalls of the roll, a central unwinding primer (10B).

La longueur de l'amorce 10B faisant saillie dépend directement de la longueur de la portion d'extrémité 10A et de l'angle de rabat. Cette longueur 10B est préférentiellement comprise entre 0,3 et 20 cm.The length of the protruding primer 10B depends directly on the length of the end portion 10A and the flap angle. This length 10B is preferably between 0.3 and 20 cm.

On a mis en évidence que la très faible surépaisseur générée par l'amorce repliée sur le flanc du rouleau n'affectait pas la stabilité de la palettisation.It has been demonstrated that the very small thickness generated by the bent primer on the sidewall of the roll does not affect the stability of the palletizing.

L'invention peut être mise en oeuvre avec tout type de broche ou support de bobinage. Le profil et le diamètre peuvent être quelconques, dans la mesure où l'on peut extraire la broche une fois les rouleaux formés.The invention can be implemented with any type of pin or winding support. The profile and the diameter can be any, insofar as one can extract the pin once the formed rollers.

Avantageusement, la broche présente un état de surface avec un coefficient de friction approprié, tel que l'adjonction d'un agent lubrifiant s'avère être inutile.Advantageously, the spindle has a surface state with a suitable coefficient of friction, such that the addition of a lubricating agent turns out to be unnecessary.

Il n'est pas nécessaire que la largeur de la feuille soit un multiple du nombre de feuilles découpées. On peut avantageusement enrouler la rogne. Le rouleau de plus faible largeur ainsi formé sert alors d'amortisseur lors de l'extraction de la broche. Il est ensuite éliminé.The width of the sheet does not have to be a multiple of the number of cut sheets. We can advantageously wind the trim. The roll of smaller width thus formed then serves as a buffer during the extraction of the spindle. He is then eliminated.

La présente invention permet aussi de ne pas utiliser d'agent liant pour garder le trou ouvert après retrait de la broche. Une éventuelle réduction de la dimension du trou central avant emballage, ou même lors de chocs et/ou vibrations qui surviendraient pendant le transport, ne sont pas préjudiciables à la solution de l'invention. L'amorce (10B) de préhension reste disponible à l'utilisateur final.The present invention also makes it possible not to use a binding agent to keep the hole open after removal of the pin. Any reduction in the size of the central hole before packaging, or even during shocks and / or vibrations that would occur during transport, are not detrimental to the solution of the invention. The primer (10B) gripping remains available to the end user.

L'alimentation de la broche est effectuée après arrêt de la machine. La présente invention s'applique aussi bien sûr aux cas où le changement de la broche est effectué sans arrêt de la machine. Dans le domaine, on qualifie de « cycle continu » ou « non stop », une telle machine.The spindle is fed after the machine stops. The present invention also applies of course to cases where the change of the spindle is performed without stopping the machine. In the field, such a machine is described as "continuous cycle" or "non-stop".

On a décrit un procédé avec enroulement autour d'une broche. Ce principe s'applique également à un procédé ne faisant pas appel à un support de bobinage.A method has been described with winding around a spindle. This principle also applies to a process that does not use a winding support.

Selon l'invention, on procède à la formation d'une amorce de dévidage central après formation des rouleaux. Ceux ci peuvent avoir été réalisés selon les procédés décrits précédemment, c'est à dire avec coupe en ligne en amont du bobinage.According to the invention, it proceeds to the formation of a central unwinding primer after forming the rollers. These may have been made according to the methods described above, that is to say with line cutting upstream of the winding.

Selon un autre procédé, on enroule la feuille mère sans refente en ligne, pour former un « log » à la largeur de la feuille mère sur une broche sans mandrin. On extrait la broche puis on tronçonne le log à la scie.According to another method, the mother sheet is wound without slitting in line, to form a "log" to the width of the mother sheet on a spindle without mandrel. The spindle is extracted and the log is cut with a saw.

On retire ensuite du trou central une portion de l'extrémité interne de la feuille.A portion of the inner end of the sheet is then removed from the central hole.

Par exemple, un moyen pour effectuer cette opération consiste à introduire dans le trou central une pièce cylindrique de longueur et de diamètre inférieurs à celui-ci. Cette pièce est pourvue d'un moyen de préhension de l'extrémité de la feuille. Il peut s'agir par exemple d'un moyen d'aspiration.For example, one way to perform this operation is to introduce into the central hole a cylindrical piece of length and diameter less than this one. This piece is provided with a means for gripping the end of the sheet. It may be for example a suction means.

On a représenté sur la figure 6 un exemple de réalisation de ce moyen d'extraction de la portion d'extrémité de la feuille.We have shown on the figure 6 an embodiment of this extraction means of the end portion of the sheet.

Il est constitué d'un élément cylindrique (100) communiquant par des perforations (102) avec une source de vide. On introduit l'élément (100) dans le trou central et on crée une aspiration par laquelle la feuille est plaquée contre sa paroi. On tourne l'élément autour de son axe, tout en le retirant du trou ; de façon combinée, soit préalablement ou postérieurement à son extraction du trou. L'extrémité de la feuille est alors entraînée hors du rouleau. Cette partie sortie du rouleau constitue l'amorce de dévidage (10B). L'extraction du dit élément est stoppée lorsque la longueur de la feuille extraite est considérée suffisante. D'autre moyens que ce moyen d'aspiration à la portée de l'homme du métier sont envisageables. La séparation de la dite feuille de l'élément cylindrique est réalisée ensuite par simple coupure de l'aspiration. Si besoin, elle peut également être réalisée par soufflage au travers de ces mêmes perforations, ou par tout autre moyen approprié.It consists of a cylindrical element (100) communicating with perforations (102) with a vacuum source. The element (100) is introduced into the central hole and an aspiration is created by which the sheet is pressed against its wall. The element is turned around its axis, while removing it from the hole; in combination, either before or after its extraction from the hole. The end of the sheet is then driven out of the roll. This exit portion of the roll is the unwinding leader (10B). The extraction of said element is stopped when the length of the extracted sheet is considered sufficient. Other means that this means of aspiration within the reach of the skilled person are conceivable. The separation of said sheet of the cylindrical element is then performed by simply cutting the suction. If necessary, it can also be performed by blowing through these same perforations, or by any other appropriate means.

Claims (3)

  1. Method for manufacturing a coreless roll (10') with a smaller central hole, consisting of a sheet (10) of non-moist flexible material such as an absorbent fibrous material, formed by winding the sheet around a winding axis, comprising a central unwinding start (10B) forming a protrusion along the said axis, relative to at least one portion of the plane of one of the sides of the roll, the start (10B) ranging between 0.3 and 20 cm and preferably between 1 and 15 cm, the start (10B) consisting of a portion of the inner end of the sheet (10), characterized in that the roll is formed by winding the sheet on a winding support,
    - the roll is extracted from the support, and
    - the said portion of the end is slid out of the hole made by the support before the hole collapses on itself in order to form the said start (10B).
  2. Method according to Claim 1, in which
    - a wide sheet of flexible material is first cut into a plurality of individual sheets placed side by side,
    - the said sheets are wound around a winding support (11)
    and
    - each of the rolls is separated after they have been formed, before each of the portions of their end is slid out of the hole made by the support.
  3. Method according to Claim 1, in which
    - a wide sheet of flexible material is wound around a winding support (11) in order to form a "log" to the total width of the sheet and to the diameter of the final individual roll,
    - the rolls are produced by sawing this "log", before each of the portions of their end is slid out of the hole made by the spindle.
EP08015903.1A 2003-06-12 2003-06-12 Method of manufacturing a roll that unwinds from the centre Expired - Lifetime EP2017205B1 (en)

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PCT/FR2003/001776 WO2005005295A1 (en) 2003-06-12 2003-06-12 Centre-feed roll and production methods thereof
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EP1636123B2 (en) 2011-07-13
US20070057103A1 (en) 2007-03-15
ATE411249T1 (en) 2008-10-15
CA2528335C (en) 2013-01-08
AU2003255672A1 (en) 2005-01-28
EA200501778A1 (en) 2006-06-30
US20100032511A1 (en) 2010-02-11
PT1636123E (en) 2009-01-19
DE60324201D1 (en) 2008-11-27
ES2433382T3 (en) 2013-12-10
EP1636123A1 (en) 2006-03-22
EP2017205A1 (en) 2009-01-21
SI1636123T1 (en) 2009-02-28
CA2528335A1 (en) 2005-01-20
WO2005005295A1 (en) 2005-01-20
ES2315575T3 (en) 2009-04-01
EA007435B1 (en) 2006-10-27
DK1636123T3 (en) 2009-02-16
US8146851B2 (en) 2012-04-03
ES2315575T5 (en) 2011-12-01
EP1636123B1 (en) 2008-10-15

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