EP2225159A1 - Amélioration apportée aux emballages de produits de papiers sanitaires et domestiques, en particulier aux emballages de rouleaux, procédés et machines liés à leur production - Google Patents

Amélioration apportée aux emballages de produits de papiers sanitaires et domestiques, en particulier aux emballages de rouleaux, procédés et machines liés à leur production

Info

Publication number
EP2225159A1
EP2225159A1 EP08862681A EP08862681A EP2225159A1 EP 2225159 A1 EP2225159 A1 EP 2225159A1 EP 08862681 A EP08862681 A EP 08862681A EP 08862681 A EP08862681 A EP 08862681A EP 2225159 A1 EP2225159 A1 EP 2225159A1
Authority
EP
European Patent Office
Prior art keywords
pack
opening
plastic film
film
closing device
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.)
Ceased
Application number
EP08862681A
Other languages
German (de)
English (en)
Inventor
Matteo Giardini
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fabio Perini Packaging SpA
Original Assignee
KPL Packaging SpA
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 KPL Packaging SpA filed Critical KPL Packaging SpA
Publication of EP2225159A1 publication Critical patent/EP2225159A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/06—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths
    • B65B11/18—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in two or more straight paths
    • B65B11/20—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in two or more straight paths to fold the wrappers in tubular form about contents
    • B65B11/22—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in two or more straight paths to fold the wrappers in tubular form about contents and then to form closing folds of similar form at opposite ends of the tube
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/06—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths
    • B65B11/38—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a combination of straight and curved paths
    • B65B11/40—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a combination of straight and curved paths to fold the wrappers in tubular form about contents
    • B65B11/42—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a combination of straight and curved paths to fold the wrappers in tubular form about contents and then to form closing folds of similar form at opposite ends of the tube
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B25/00—Packaging other articles presenting special problems
    • B65B25/14—Packaging paper or like sheets, envelopes, or newspapers, in flat, folded, or rolled form
    • B65B25/146—Packaging paper or like sheets, envelopes, or newspapers, in flat, folded, or rolled form packaging rolled-up articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B41/00—Supplying or feeding container-forming sheets or wrapping material
    • B65B41/12—Feeding webs from rolls
    • B65B41/16—Feeding webs from rolls by rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/04—Applying separate sealing or securing members, e.g. clips
    • B65B51/06—Applying adhesive tape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/02—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for perforating, scoring, slitting, or applying code or date marks on material prior to packaging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/04—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages
    • B65B61/12—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages by tearing along perforations or lines of weakness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/18—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements
    • B65B61/188—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements by applying or incorporating profile-strips, e.g. for reclosable bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B65D33/2541—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor characterised by the slide fastener, e.g. adapted to interlock with a sheet between the interlocking members having sections of particular shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B65D33/2575—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor the slide fastener providing access to the bag through a bag wall, e.g. intended to be cut open by the consumer
    • B65D33/2583—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor the slide fastener providing access to the bag through a bag wall, e.g. intended to be cut open by the consumer the slide fastener being attached to one wall only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/813—Applying closures
    • B31B70/8131—Making bags having interengaging closure elements
    • B31B70/8132—Applying the closure elements in the machine direction

Definitions

  • the present invention relates to improvements to methods and devices for packaging tissue paper products, in particular but not exclusively for producing packs of rolls of tissue paper, such as toilet paper, kitchen towels and the like.
  • the present invention also relates to improvements to packs of tissue paper products, such as, but not exclusively, rolls of toilet paper, kitchen towels or other tissue paper rolls.
  • Tissue paper products such as paper napkins and handkerchiefs, but above all tissue paper rolls, are packaged in packs or multipacks. Distribution through major multiples (shopping malls, supermarkets, hypermarkets and the like) leads to the tendency to use packs of increasingly large dimensions and containing a greater number or articles. However, this causes some problems and drawbacks during use. In fact, these packs are generally wrapped in heat-sealed plastic film. During initial use, i.e. when the user removes the first article, for example a roll of toilet paper or kitchen towel, the plastic film is torn and the pack remains open. In many cases the film breaks so that it no longer offers any protection to the remaining rolls or other articles, which can become soiled or deteriorate. The greater the number of rolls or other articles contained in each pack, the more this is true, as the larger the pack the longer it lasts. Summary of the invention
  • the invention provides a new pack which solves or alleviates at least some of these problems, which comprises a plurality of products wrapped in a plastic film, and wherein the plastic film presents a zipper or other device for opening and closing the pack.
  • the opening and closing device is a zipper
  • it is advantageously formed by a zipper also produced in plastic material, of the type commonly known as "minigrip”, "zip-lock” or similar trade names, which is advantageously welded along an intermediate cut provided in the plastic film that wraps a single pack.
  • the opening and closing device can be formed by a strip of adhesive film, fastened firmly on one side to a part of the pack and provided with permanent adhesive on the opposite side with respect to the intermediate cut, so that it can be detached and re-attached several times without drying and ensures sufficient seal against external agents.
  • the opening and closing device can be produced with the use of materials known with the trade name "Velcro".
  • the user can access the rolls or other tissue paper products contained in the pack without tearing the plastic film, but by opening the zipper.
  • the zipper can be re-closed and the pack remains substantially intact, so as to keep the products remaining therein in optimum conditions.
  • the invention relates to a method for producing a pack of rolls or other tissue paper articles or products, comprising a plastic wrapping film and a zipper for opening and closing the pack, comprising the steps of: - grouping together an orderly plurality of said products; preparing a portion of plastic packaging film;
  • the portion of plastic film comprises a zipper or other opening and closing device.
  • the invention relates to a device for forming packs of tissue paper products, in particular and preferably (but not exclusively) tissue paper rolls, comprising: a station for forming groups of products; a packaging station, in which the groups of products are wrapped in a plastic film to form single packs of products; and members to apply a zipper or other reversible opening and closing device to the plastic film, before, during or after production of the pack.
  • Figure 1 shows a plan view of a machine for producing a pack according to the invention, in a first embodiment
  • Figure 2 shows a schematic side view according to H-Il of Figure 1;
  • Figure 3 shows a schematic front view according to Ill-Ill of Figure 1 ;
  • Figure 4 shows an explanatory diagram of the feed of the film and of the products to be packaged in the machine of Figures 1 to 3;
  • Figure 5 shows a perspective view of a pack obtained with the machine of Figures 1 to 4;
  • Figure 5A shows an enlarged cross section of a zipper applied to the film for wrapping the pack, according to the line VA-VA of Figure 4;
  • Figure 6 shows a schematic plan view of a modified embodiment of the machine;
  • Figure 7 shows a diagram illustrating feed of the film and of the products in the machine of Figure 6;
  • Figure 8 shows a perspective view of the pack obtained with the machine of Figure 6;
  • Figures 9 to 13 show an operating sequence of a different packaging machine to which the present invention can be applied.
  • Figure 14 shows a pack obtained with the machine of Figures 9 to 13. Detailed description of embodiments of the invention - A -
  • the pack of the present invention is a pack containing single articles, each of which is formed by a plurality of individually usable elements. Each single article can be in turn packaged individually or a plurality of articles can be combined together, for example the rolls can be combined in pairs.
  • the pack indicated as a whole with 1 , comprises a plurality of tissue paper articles, in the example a plurality of rolls of toilet paper R, arranged in a plurality of layers, each of which comprises a series of rows of rolls.
  • the articles or rolls R are wrapped in a thermoplastic film F welded along a longitudinal weld line L, along which two longitudinal edges of film are overlapped.
  • the pack 1 On the front faces the pack 1 has four flaps folded against the flat front surfaces of the rolls R and welded.
  • the pack 1 presents an openable and closable zipper indicated with 3 and formed by mutually complementary profiles made of plastic material, the one shaped as a male profile and the other as a female profile inside which the male profile can be inserted interlockingly to close the zipper.
  • Zippers of this type are known and typically used to reversibly close and open plastic bags in particular for packaging foods.
  • a diagram of a zipper of this type is represented in Figure 5A. These zippers are commonly known as "Minigrip", “Zip-lock” or the like and are described in numerous patents including GB 1.185.894, GB 1.1214.583, GB 1.156.170, GB 1.444.326, WO 2005/082731.
  • the zipper 3 can be applied in a suitable position on the pack.
  • the position will be chosen in order to facilitate removal of the articles packaged in the pack 1. If these (as in the example shown) are in the form of rolls, the zipper 3 and the relative opening, which is reversibly opened and closed therewith, will preferably be positioned along an area of the film in contact with the rolls, rather than in the intermediate areas between two consecutive tangent areas between roll and film.
  • the zipper 3 is positioned along an edge area, which facilitates removal of the articles once the zipper is opened.
  • Figure 5 also shows with a dashed line a different alternative position of the zipper 5, in one of the tangent areas of the film with respect to the rolls contained in the pack. Again in Figure 5 a sort of security seal 4 is shown, which is removed the first time the pack is opened and which guarantees its integrity.
  • the zipper 3 is applied to the film F along a substantially rectilinear cut that forms the opening to access the inside of the pack 1 , which will be produced by wrapping a group of rolls R with a portion of film F.
  • Strips 3A, 3B of plastic material which form the zipper 3 are welded or glued to the edges at the cut.
  • the zipper is formed by male 3C and female 3D profiles (produced on the strips 3A and 3B respectively), which mutually interlock.
  • the male and female profiles extend approximately parallel to the length of the cut produced in the film F preferably for a length greater than the length of this cut.
  • the zipper can be opened and closed repeatedly so that when the film F is wrapped around the pack 1 , opening of the zipper 3 allows the rolls or other articles R contained inside the pack to be accessed and removed. After the desired number of rolls have been removed the two profiles forming the zipper 3 are coupled again, thus closing the opening for access to the pack and allowing correct and hygienic storage of the remaining products R inside.
  • Zippers 3 of this type are already known and typically employed to close the mouths of plastic bags, i.e. they are normally applied to opposite flaps with parallel faces of a plastic manufactured product.
  • the strips on which the two mutually coupling profiles of the zipper are produced are on opposite faces of strips of plastic which overlap, but which are glued or preferably welded to a single sheet of thermoplastic film, along a cut produced in this sheet.
  • the length of the zipper 3 is such as to allow easy removal of single rolls R from the pack 1 , so that the user can remove single rolls from the pack re-closing it to keep the remaining rolls in hygienic conditions and protected from dampness and dust.
  • an adhesive band to protect and seal the pack (indicated schematically with 4 in Figure 5) can advantageously be applied over the zipper 3 or part thereof.
  • This adhesive or sealing band ensures the integrity of the pack at the time of purchase and will be removed by the final user when the pack is opened for the first time using the zipper.
  • the adhesive band is advantageously applied in a step not shown, subsequent to application of the zipper 3 to the film F.
  • the film forming the pack can present a cut or perforation line under the zipper which, instead of being continuous, is cut or perforated at regular intervals to form a line that facilitates tearing.
  • the integrity of the line of discontinuous cuts or perforations guarantees the integrity of the pack at the time of purchase, preventing the risk of contamination by external agents.
  • FIGS. 1 to 3 show a first embodiment of a machine designed for this purpose. It can be formed more or less as described in the Italian patent no. 1.305.810, or it can present a configuration similar to that of machines by the same applicant, marketed with the name A5T, T100, CMW111 or others.
  • the machine comprises a line 5 to feed layers of products R towards an elevator platform 7.
  • a plurality of layers of products or rolls R are positioned on the elevator surface and subsequently transferred to a series of pushers 9 above.
  • Consecutive pairs of pushers 9 define seats 11 to house groups of rolls R, which must be inserted in single packs 1.
  • the pushers 9 feed the single groups of products or rolls R along a substantially horizontal conveyor surface 13 towards an area for folding and welding the front flaps of the plastic film wrapping the pack.
  • the film F is fed to the machine from a reel B resting in a cradle formed by rollers 19 ( Figure 2) and which can be arranged with the axis parallel or orthogonal to the direction of feed of the pushers 9.
  • the first solution is shown schematically in Figures 2 to 5 while the second solution is shown schematically in Figures 6 to 8.
  • the zipper 3 is applied to the film with an orientation substantially parallel to the longitudinal extension thereof, i.e. parallel to the direction of unwinding of the film from the reel B.
  • Figure 2 shows a diagram of the path of the film towards the pushers 9, which can be used both in the configuration with the reel disposed with the axis parallel to the movement of the pushers 9 and in the configuration with the axis of the reel orthogonal to the movement of the pushers.
  • the path of the film F extends from the reel towards a series of drive rollers 21 ,23, 25, one of which preferably with movable axis (dancer roll) to allow a variation of the feed speed of the film from the reel for the reasons clarified below.
  • a brake actuated by an actuator 27A to stop the film during the step to apply the zipper 3.
  • an area for application of the zipper 3 is provided downstream of the brake 27 , which a cutting blade 29 is provided, which cooperates with a counter- blade 31 to produce a cut in the film approximately the same length as the zipper 3. This is applied, by gluing, welding or in another suitable manner, by an applicator generically indicated with 33.
  • a photocell 35 is provided in a suitable position to detect a notch printed on the film F which determines the position in which the cut must be produced in the film and the zipper 3 must be applied, in the manner clarified below.
  • a film storage unit Arranged downstream of the photocell 35 is a film storage unit formed by a series of idle rollers 37 with fixed axis and a series of idle rollers 39 with movable axis.
  • the reciprocal distance between the rollers 37, 39 varies when the feed speed of the film through the area for cutting and applying the zipper 3 varies.
  • the numeral 41 indicates a possible further photocell which detects the position of the photocell notches on the film to activate a perforating or cutting blade 43 rotating and cooperating with a fixed counter-blade 45 to divide the film F fed continuously from the reel B into single portions separated by transverse perforation lines. Each section or portion of film F between two perforation lines generated by the rotating blade 43 is then detached from the subsequent section to form the sheet to wrap and package a single pack 1.
  • the numeral 47 indicates drive rollers, at least one of which is motorized, to unwind the film F from the reel B towards the packaging area.
  • Arranged downstream of the blade 43 and counter-blade 45 are two pairs of belts 48, 49.
  • Each pair of belts (only one of which is shown in the side view of Figure 2) engages an edge of the film, so as to feed the extended film towards the opening 13A of the conveyor surface 13.
  • Arranged downstream of the two pairs of belts 47, 49 are a further two pairs of belts 48A, 49A, controlled at variable speed, to tear the single sections of film F along the perforation lines.
  • the perforation lines are mutually phased so that a zipper 3 is applied between each pair of lines, in a position such as to be located on a lateral face of the pack 1 , while the end bands of the cut sheet of film F form the flaps folded on the front faces of the pack.
  • the position of the zipper 3 with respect to the edges of the sheet of film F is shown schematically in Figure 4 for the configuration in which the film is fed from a reel B arranged with the axis A-A thereof parallel to the direction of feed of the pushers 9.
  • the longitudinal flaps which are welded along the line L of the pack 1 are indicated with L1 and L2, while the band of the sheet of thermoplastic film F which when folded forms the welded front flaps of the pack is indicated with L3.
  • Orientation of the zipper 3 facilitates pulling of the film F by the drive rollers 47.
  • these rollers can have an annular groove along the area in which the zipper 3 passes, so as not to interfere with it.
  • the drive rollers 47 are formed by rotating shafts, at least one motorized, which carry rollers of lesser axial length than the width of the film F, disposed so that the zipper 3 is fed between two axially aligned rollers.
  • the direction of feed of the film is indicated with fF and the direction of feed of the rolls R is indicated with fR.
  • Movement of the film F is substantially continuous at approximately constant speed downstream of the storage unit 37, 39, while upstream of this storage unit feed can be cyclically interrupted to allow application of the zippers 3 to each portion of film F, which will subsequently be defined between two consecutive perforation lines. Stepped feed of the film F is possible due to the brake 27 which cyclically stops the film and to the storage unit 37, 39 which allows continuous feed of the film in the area downstream, thus making the operations to apply the zippers 3 independent from the operations to perforate and tear the portions of film.
  • the pack obtained is represented schematically in Figure 8, in which it can be seen that the orientation of the zipper 3 is rotated through 90° with respect to the orientation it presented in Figure 5.
  • the concept underlying the invention can also be embodied in other packaging machines, for example of the type described in WO-A- 2007/046126, to which specific reference can be made for greater constructional details of these machines and their operation.
  • Figures 9 to 13 schematically show the characteristics of these machines relevant for the purposes of the present description, while Figure 14 schematically shows a pack 1 obtained with this machine.
  • the groups of rolls R are fed between two substantially parallel walls 51 , 53 by a pusher 55, so as to wrap the group of rolls R on three sides with a sheet or section of thermoplastic film F positioned in front of the path of the rolls R.
  • the film is held taut by temporary stop members 57 with a zipper 3 applied to the film F in the same manner as described previously with reference to Figure 2 and preferably positioned in the area that will subsequently wrap a smaller lateral face of the final pack.
  • the 59 is located, which carries a series of parallel belts 61 , 63, between which the group of rolls R partly wrapped in the plastic film F is placed.
  • the belts 61 , 63 cooperate with the pusher 55 to advance the pack being formed.
  • the drum 59 carries fixed folding elements 65 which fold the flaps of the film that project laterally from the pack. Once the group of articles or rolls R has been pushed into the drum 59 between the upper and lower belts 61 , 63, the drum is rotated through 180° and the belts 61 , 63 are made to move again to eject the pack being formed, so as to cause closing of the front flaps of the film F through further folders 71 , 73 and 75.
  • the numeral 77 indicates a welder to weld the overlapped longitudinal flaps of the film F and 79 indicates a front welding device of the four flaps of film which have been folded on each front face of the pack 1.
  • the entire operating cycle described above is known and can be subject to variations, for example as a function of the form of the folding means, of the welding means or of other features of the machine.
  • the drum 59 can be omitted and folding of the lateral flaps of the sheet of thermoplastic film F can be obtained with movable rather than fixed folders.
  • the portion of film F, which is positioned between the members 57 has previously been provided with a zipper 3 with a system similar to the one described with reference to Figure 2, or in another suitable manner.
  • the pack 1 which is obtained is provided with a zipper 3. It will preferably be placed on one or on the other of the two smaller sides of the pack 1 , as schematically indicated in Figure 14.
  • the zipper it would also be possible to apply the zipper to the pack in a different manner to the one shown in the drawing.
  • cutting of the film takes place in a previous step, so as not to damage the wrapped products.
  • the geometry and the operating function of folding machines allow the zipper to be applied during one of the dwell steps or immediately downstream of the pack closing position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Paper (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Abstract

La présente invention porte sur un emballage (1) pour produits de papiers sanitaires et domestiques (R) incluant une pluralité de produits emballés dans un film plastique (F), ledit film plastique présentant un dispositif servant à ouvrir et à fermer l'emballage.
EP08862681A 2007-12-14 2008-12-04 Amélioration apportée aux emballages de produits de papiers sanitaires et domestiques, en particulier aux emballages de rouleaux, procédés et machines liés à leur production Ceased EP2225159A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000280A ITFI20070280A1 (it) 2007-12-14 2007-12-14 "perfezionamenti alle confezioni di prodotti di carta tissue, in specie confezioni di rotoli, e relativi metodi e macchine per la loro produzione"
PCT/IT2008/000742 WO2009078051A1 (fr) 2007-12-14 2008-12-04 Amélioration apportée aux emballages de produits de papiers sanitaires et domestiques, en particulier aux emballages de rouleaux, procédés et machines liés à leur production

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EP2225159A1 true EP2225159A1 (fr) 2010-09-08

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EP (1) EP2225159A1 (fr)
IT (1) ITFI20070280A1 (fr)
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WO2024061846A2 (fr) 2022-09-22 2024-03-28 Valmet Tissue Converting S.P.A. Machine d'emballage à dispositif de distribution de produit d'étanchéité

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WO2024061845A1 (fr) 2022-09-22 2024-03-28 Valmet Tissue Converting S.P.A. Machine d'emballage avec dispositif de scellement pour matériaux d'emballage en papier
WO2024061846A2 (fr) 2022-09-22 2024-03-28 Valmet Tissue Converting S.P.A. Machine d'emballage à dispositif de distribution de produit d'étanchéité

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