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
  • 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
  • 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
  • B65H19/2238—The web roll being driven by a winding mechanism of the nip or tangential drive type
  • B65H19/2246—The web roll being driven by a winding mechanism of the nip or tangential drive type and the roll being supported on two rollers
• • 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
  • B65H2301/41486—Winding slitting winding on two or more winding shafts simultaneously
  • B65H2301/414866—Winding slitting winding on two or more winding shafts simultaneously on bed rollers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2701/00—Handled material; Storage means
  • B65H2701/10—Handled articles or webs
  • B65H2701/18—Form of handled article or web
  • B65H2701/184—Wound packages
  • B65H2701/1844—Parts concerned
  • B65H2701/18442—Core

Definitions

• the invention relates to the field of absorbent paper products, cellulose wadding, or other similar material such as a nonwoven, presented in the form of rollers and intended for wiping. It relates in particular to the field of products for sanitary or domestic use, such as wiping rolls, towels or toilet paper.
• the rolls consist of a continuous sheet which comprises one or more plies.
• the sheet is optionally precut in consecutive coupons in the direction of the winding, and is wound axially, preferably around a support, a pin for example, which may or may not support a mandrel; the roll can thus comprise a central mandrel or not.
• the sheet of the outer turn can be unwound from the periphery of the roll, in the direction of the winding. In this case it is said that the roll is tangential feeding. After having removed the mandrel, if necessary, the sheet of the inner turn can be unwound from the center, in the axial direction, perpendicular to the winding direction of the roll. In the latter case, it is said that the roll is centrally rewind.
• WO2005005295 and FR0405022 It consists in forming a primer by moving laterally the free end of the sheet, so that it protrudes from one of the sides of the roll.
• this solution may be ineffective if the roll has been defined with fragile pre-cuts and the central hole is deformed or worse, completely collapsed. Indeed, the first coupon can then be detached during the extraction of the opening, the subsequent sheets then becoming difficult to access or inaccessible.
• a bonding agent applied to the first turns of the spool makes it possible to form a well-formed hole, the appearance of which depends on the profile of the spindle. For example, pins of polygonal, grooved or cylindrical section are used. These pins lead to the formation of a hole of the corresponding profile.
• these first turns being associated with each other, it is not possible to extract the first sheet alone. It can not be avoided often to remove all at the same time; it inevitably generates waste. Moreover, beyond these first associated turns, the walls are no longer maintained; they can collapse during use or at any other time.
• a bonding agent can be applied to at least one of the two slices of the roll or on at least one of the edges of the sheet.
• these means can not effectively avoid collapse during distribution, especially for large products.
• the invention proposes a solution that avoids the disadvantages of the previous solutions.
• the mandrel-free roll is composed of a sheet of flexible material, such as an absorbent fibrous material, formed by winding the sheet around a winding axis forming a hole in the center, and presenting a first group of interconnected turns, is characterized in that it comprises a second group of non-interconnected turns between said hole in the center and the first group.
• a turn corresponds to a turn in the roll.
• Linked turns are turns which are associated with each other by any means of connection, including water, but whose separation from each other remains easy under the usual conditions of use of unwinding.
• the solution of the invention has the advantage of being able to be implemented very simply, by arranging the means ensuring the connection, for example the spraying of a liquid substance, appropriately during the winding of the sheet. No additional devices are expected.
• the liquid substance is water or an aqueous adhesive substance.
• the number of non-interconnected turns of the second group is greater than or equal to 2. It is preferably less than the number of turns corresponding to 10% of the length of the roll.
• the solution of the invention applies in particular to the rollers of the type with tight winding allowing the realization of dense rollers, said compact.
• Such rolls can be made for use in central reeling, preferably with a free end of the first turn from the central hole, and offset relative to one of the sidewalls of the roll, or for use in tangential unwinding.
• the roll comprises at least one additional group of interconnected turns, between said first group of connected turns and the periphery of the roller, these groups of connected turns being separated from each other by non-coils. linked.
• This succession of unbonded turns and groups of connected turns can be repeated at will according to need, and according to the ability to not collapse of the wound material and the more or less significant dimension of the coil.
• This solution also has the advantage of avoiding the collapse of the walls when the roll is already widely started and that the hole has become consequent.
• the application of the bonding agent may vary between each roll, between each bound turn of the same roll, both in terms of the deposited agent, the covered surface, the quantity, the length, and the position of the this liaison agent.
• the invention also relates to a method of manufacturing a roll, according to which a sheet is wound around a winding axis and a bonding agent is applied to bond the turns together, after formation of a predetermined number spirals unrelated to each other. Unbound turns are the first turns formed around the winding axis.
• Figure 1 schematically shows a paper roll according to the invention
• Figures 2 to 4 show a method of manufacturing rolls from a mother reel
• Fig. 5 shows a means for forming a central unwinding leader.
• FIG. 1 shows a roll 1 placed on one of the lateral faces forming one of the sides of the roll.
• This is for example a roll of wiping paper central reeling, which was removed if necessary the mandrel.
• the sheet F is wound continuously from the center.
• the inner end of the roll is shown with the first partially extracted sheet F1.
• the central hole will have a natural tendency to close. It then becomes difficult to grasp alone, the end of the first leaf. It is already known to glue the leaves together at the first turns. But if we consolidate the turns forming the periphery of the central hole, it remains however in this bound area, the difficulty of individually grasp the sheet constituting the first turn.
• the risk of collapse is reduced by producing a bonded zone, but leaving the leaves of the very first turns free to bond, to allow the user easy priming of the coil.
• the bonded area is defined so as to ensure sufficient cohesion between the turns to ensure good holding of the roller while allowing easy separation of these turns under the usual unwinding conditions.
• FIG 1 there is shown in thick lines a first group 10 where the turns are interconnected.
• the walls of the central hole are strengthened by binding a number of turns together, but also the first sheet (s) constituting the first two turns at least remain ) free and can therefore be entered without difficulty.
• the first sheet (s) constituting the first two turns At the extreme, only the first two turns are not associated; all the other turns of the roll are linked together, thus forming a single group of linked turns.
• the walls of the coil are consolidated by at least one, or preferably, additional and non-contiguous groups (11, 12) of linked turns; their number depends essentially on the dimensions of the roll.
• the groups of non-contiguous linked turns (10, 11, 12) are separated from each other by non-bound turns (21, 22).
• the group (s) of linked turns comprise a number of turns between 4 and 20.
• FIG. 2 shows a diagram of a roll making process.
• a mother reel 103 of cellulose wadding for example, is unwound from its support.
• Sheet F is driven to the roll forming station.
• the mother reel is of width 2.60 m for example.
• the sheet is cut longitudinally with respect to its direction of travel by means of knife blades 105.
• a sheet of 2.60 m width can be cut into 13 strips 100 of 20 cm width.
• the strips 100 are guided to come on a pair of cylinders 107 and 109 arranged side by side.
• a pin 111 with or without mandrels is placed on the strips 100, at the hollow formed between the two cylinders 107 and 109, upstream of the downstream ends 100A.
• a means 115 moves the ends 100A of the strips 100 over the pin 111 with or without a mandrel. It is advantageously air jets properly oriented. We see on the Figure 3 that the end is being folded. Then a support cylinder 113 is lowered, whose function is to hold the ends 10OA on the spindle 111 equipped or not with mandrels, as well as the spindle 111 equipped or not with mandrels on the two cylinders 107 and 109, and to compress the sheet during winding. The drive in rotation of at least one of the cylinders 107, 109 or 113 is controlled; This leads to the pin 111 and the strips 100. The winding begins and the rollers 110 'are formed.
• an applicator means 118 of a coil bonding agent is placed on the path of the strips 100 therebetween.
• This agent may be water, but an adhesive substance may also be used.
• This means is for example disposed upstream of the cylinders 107 and 109 and applies the bonding agent to the surface of the sheets 100.
• a liquid agent it is advantageously a sprayer.
• the surface of the sheet receiving the sprayed liquid, the quantity applied, the continuous or discontinuous application mode, in particular, are determined as required. Due to the pressure exerted on the sheet during the winding, the water for example, allows in the areas of contact turns between them, the formation of bonds between the cellulosic fibers. These connections allow the association of turns. Nevertheless, this association is made in such a way as to guarantee easy distribution of the bound turns during a usual unwinding, either by the center or in tangential.
• the application of the bonding agent is interrupted or not until the rolls are formed.
• the application of the binding agent is temporarily interrupted, to resume it thereafter and thus to form another group of linked turns, separated from the first by a group of unbonded turns.
• This succession of groups of unrelated and linked turns can be repeated at will. It is understood that the choice of the number of groups of linked turns depends on the objective, their frequencies and the dimensions of the roller. A large roll with a large diameter will include several areas to accompany the unwinding and prevent the walls from collapsing during use or at any other time.
• the application of the bonding agent varies between each roller or between each tied coil of the same roller, according to at least one of the following parameters: nature of the bonding agent deposited, its quantity, its position relative to the sheet, the surface or the covered form.
• the assembly formed by the spindle and the rollers is evacuated.
• the plurality of strips 100 is cut by means of a transverse knife. After winding the end of the strips 100, the rolls are extracted. In the case of roll without mandrel, this operation will be facilitated by the use of a conical pin, or, as is known, by the use of a mechanized pin with adjustable diameter. To allow easier extraction, these pins may or may not be coated with a coating reducing their coefficient of friction.
• a cylinder is formed without longitudinal cut 105 upstream of the winding. After extraction of the winding support, this cylinder is sawed into individual rolls.
• the technique described in the two patent applications is applied in the name of the Applicant WO2005005295 and FR0405022. It is according to this technique to create a gripping primer by moving, laterally with respect to the direction of travel, the end of the sheet HOA constituting the first turn. This portion then exceeds the roll and ensures that the sheet will be extracted without problems.
• FIG. 5 Another method of forming a wire feed primer is shown in FIG. 5.
• a cylinder 200 of smaller diameter than the central hole comprises perforations 210. It is connected to a vacuum source not shown in the figure.
• cylinder 200 is introduced into the central hole and the inside of the cylinder is drawn into suction. The first turn of the winding being free, it comes to press against the cylinder 200 because of aspiration.
• the cylinder 200 is then rotated by a fraction of a turn on itself in a predetermined direction, and then extracted from the roll. The leaf is then driven by the movement. When it is out of the desired length with respect to the side of the roll, the vacuum is cut and the cylinder is moved away. The roll is thus ready for use.

Landscapes

• Sanitary Thin Papers (AREA)
• Storage Of Web-Like Or Filamentary Materials (AREA)
• Winding Of Webs (AREA)
• Unwinding Webs (AREA)
• Manufacture Of Motors, Generators (AREA)
• Replacement Of Web Rolls (AREA)
• Paper (AREA)
• Storage Of Fruits Or Vegetables (AREA)
• Manufacturing And Processing Devices For Dough (AREA)
• Spinning Or Twisting Of Yarns (AREA)
• Lubricants (AREA)
• Adhesive Tapes (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (3)

Family

ID=35744598

Family Applications (1)

Country Status (13)

Families Citing this family (3)

Family Cites Families (16)

• 2005
  • 2005-06-08 FR FR0551545A patent/FR2886929B1/fr not_active Expired - Fee Related
• 2006
  • 2006-06-07 PT PT06764745T patent/PT1893513E/pt unknown
  • 2006-06-07 RU RU2007147998/11A patent/RU2397135C2/ru not_active IP Right Cessation
  • 2006-06-07 DK DK06764745T patent/DK1893513T3/da active
  • 2006-06-07 WO PCT/FR2006/001285 patent/WO2006131644A1/fr active Application Filing
  • 2006-06-07 AT AT06764745T patent/ATE417013T1/de not_active IP Right Cessation
  • 2006-06-07 DE DE602006004209T patent/DE602006004209D1/de active Active
  • 2006-06-07 ES ES06764745T patent/ES2318770T5/es active Active
  • 2006-06-07 US US11/916,491 patent/US20080217453A1/en not_active Abandoned
  • 2006-06-07 CA CA2611073A patent/CA2611073C/en not_active Expired - Fee Related
  • 2006-06-07 SI SI200630215T patent/SI1893513T1/sl unknown
  • 2006-06-07 MX MX2007015545A patent/MX2007015545A/es active IP Right Grant
  • 2006-06-07 EP EP06764745A patent/EP1893513B2/de active Active

Non-Patent Citations (1)

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