FR2644103A1 - METHOD FOR MANUFACTURING A BODY OF A TUBULAR PACKAGE, PACKAGE THUS OBTAINED AND DEVICE FOR CARRYING OUT SAID METHOD - Google Patents

Abstract

The method is characterised in that it consists in unrolling at least two strips intended to form the component parts (2, 3) of the first layer of the body (1), in shaping them and placing them in such a way that they are joining without overlapping, then in unrolling at least two strips intended to form the component parts (4, 5) of the second layer of the body (1), in shaping them and in positioning them in such way that they are also joining without overlapping, these operations to be continued, if necessary, depending on the number of layers provided, the joints, (6, 7) of the strips of each possible additional layer being substantially offset with respect to those of the strips of the preceding layer, and finally in cutting off and removing the packing body (1).

Description

Method for manufacturing a body of a tubular packaging, packaging

  The resulting invention relates to the field of packaging, in particular tubular packaging, and relates to a method for manufacturing a body of a

  tubular packaging comprising at least two layers

  made of a material such as paper, cardboard, foil

  of metal, synthetic material, or any other material

  res, a packaging thus obtained and a device for the

implementation of this process.

  Existing box-type packaging,

  contents, barrels, barrels, are all composed of a tu-

  bular, round, polygonal, or any other section, with a cover and a bottom. The structure of the tubular body, produced by spiral, straight, convolute or other winding, is generally as follows:

  - an internal complex, compatible with the product to be

  add up. This complex can have two or more layers. Very often, the layer having the barrier properties ensuring perfect sealing is composed of an aluminum film. It can also be in any other film having the same barrier properties and

  the same low physical strength as aluminum. This-

  the layer is as thin as possible,

  to minimize the cost of re-packaging

  read. Usually an optimal seal is obtained

  bare with a thickness of the aluminum layer of gold-

  dre from 9 to 18 t. This layer of aluminum is often covered, on each side, with a layer of a different material, for example on one side of paper and on the other

  a plastic film, or a varnish.

  - one or more layers of a more rigid material than.

  the internal complex. In general, these layers are made of cardboard, that is to say a grammage greater than about 225 g / m2. The number of layers depends, of course, on

  the desired rigidity, a barrel of washing powder required

  having a rigidity much higher than a cookie packaging, for example. - an outer layer or complex, printed or not. I1

  can be a single layer, for example a

  printed quet of the commercial name of the pro-

  duit or other indications. It could also be a complex guaranteeing a perfect seal from the outside to the inside, in order to protect the different layers of cardboard from any damage.

by an external liquid.

  The connection of these different layers is

ensured by sealing or gluing.

  As for the bottoms or covers of these packages

  ges, they are composed either of a completely different structure of the body, or of a structure equivalent to that of the body. In the latter case, they may advantageously be composed from inside the packaging.

  outwards, by a complex identical to that

  dull to the body and in contact with the product

  using one or more sheets of material more rigid than the complex, such as corrugated paper, cardboard, wood, metal, synthetic material, expanded polystyrene or any other material, the number of sheets to be applied being depending on the

  stiffness of the bottom or cover of the packaging to be obtained

  nir, and possibly by a layer or an external complex printed or not. Such a structure is described

  in French patent application No. 8701510.

  Currently, the tubular packaging bodies

  are normally produced in the following manner:

  te: we unroll the different strips on a reel, the width of each strip corresponding to the width of the profile to be produced, we increase the width of each following strip by the thickness of the previous strip, we shift each side laterally, we assemble the bands between them to form the profile, the profile is folded so as to first form an open U, then a closed U, then an O, the joints, combined with the offset of the strips, thus also being offset,

  then we dry the profile and finally we

  the section, generally by means of circular knives guided by a format cam, of the profile thus obtained in different sections whose length corresponds to that desired of the packaging body, and

  evacuates the bodies thus obtained. Such a manufacturing process

  cation is known from US Patent 2,256,263.

  However, the packaging body obtained by applica-

  tion of such a process has the major characteristic

  re to be provided with a weakening zone at the

  right of the different overlaps of the bands. They

  follows that the packaging body is not statically balanced

  only. This static imbalance leads to various drawbacks, both in terms of the manufacturing process

  only at the level of the packaging body itself.

  Indeed, at the level of the manufacturing process, the static imbalance causes difficulties for

  positioning and crimping the bottom and cover

  key. In addition, the indoor complex is very difficult

  to be put in place by heat sealing, due to the overlap

  different bands, the latter causing

  notably a lack of space for the thermoscel tool-

  lage; therefore either the production rates are slowed down, or the internal complex is dispensed with, which of course greatly affects the sealing of the packaging body. On the other hand, at the level of the packaging body itself, it deforms under stress, for example

  when the final packaging is placed in containers

  nors for transport or in shelving during

2644 1 03

  the sale, this resulting from the fact that the joints are not

  only slightly offset, the most important deformation

  you are born, of course, always at the level of the

  different bands and complexes.

  Finally, cutting with circular knives guided by a format cam requires delicate adjustment

  and causes the formation of dust.

  The general problem to be solved by the object of

  the present invention therefore consists in carrying out a process

  manufacturing die enabling a perfectly sealed, balanced packaging body to be obtained, without

  deformations arise due to inter-

  nes, in particular by eliminating all generators

  weakened and of any excess thickness due to overlapping

  banding. This process should also

  riser a significant rate of manufacture of the bodies

  packaging, easy longitudinal heat sealing of the

  interior plex as well as an equally easy installation

  se of funds and covers. Finally, the cut should

  also be made easier, by eliminating any

  licat and all abundant dust formation.

  According to the present invention, this general problem

  ral is resolved in that it relates to a method of

  manufacture of a body of a tubular packaging comprising

  with at least two superimposed layers of a material

  such as paper, cardboard, metal foil, syn-

  thetic, or any other material, characterized in that it consists of unrolling at least two strips intended to form the constituent parts of the first layer of the body to be produced, to shape them and put them in place

  in such a way that they are joined, without repeating

  cover, the sum of the width of each strip corresponds to

  laying on the perimeter of a packaging body, then

  roll at least two strips intended to form the

  3 constituent parts of the second layer of the body to be reacted

  read, shape and place them by gluing or heat sealing on the first layer in such a way that they are also joined without overlapping,

  but the joints of the bands forming the constituent parts

  tives of the second layer being substantially offset from the joints of the bands forming the parts

  constituting the first layer, the sum of the lar-

  gor of each strip forming the second corresponding layer

  also laying on the perimeter of a packaging body, to continue, if necessary, these operations depending

  the number of layers provided to form the em body

  balling, the joints of the bands of each layer

  additional tuelle being substantially offset from those of the strips of the previous layer, and finally to make the cut of the different layers thus superimposed according to the desired length of the body

  packaging, and to evacuate the packaging body obtained.

  In fact, this process makes it possible to obtain a package, the body of which comprises at least two superimposed layers of a material such as paper, cardboard, metal foil, synthetic material or any other material, packaging characterized in that each layer is composed of at least two parts, joined without overlapping, the joints of a layer being substantially offset from the joints of the lower layer

and / or higher.

  Finally, the subject of the invention is also a

  device for implementing the process, characteristic

  se in that it is mainly constituted by a ma-

  china for continuous body shaping, connected to devi

  doirs if any, glueers, one per number

  part constituting each layer of the body of the packaging

  ge, said forming machine comprising a mandrel of the desired shape of the packaging body and shaping stations and in place of each layer around the

  mandrel via rollers or forks

  mage, rollers driving the layers thus formed

26 4 4 10 3

  towards a cutter comprising different cutting stations, their number being a function of the desired length of the

  packaging body and each comprising four blades

  posed in pairs in opposition to each other. The invention will be better understood thanks to the

  description below, which relates to a mode of reaction

  preferred reading, given by way of nonlimiting example, and explained with reference to the appended schematic drawings, in which:

  Figure 1 (Figures 1A, 1B, 1C and 1D) shows

  feel in plan and section, the different stages of

  method of manufacturing a dry packaging body

  circular tion, according to the invention;

  Figure 2 (Figures 2A, 2B, 2C and 2D) shows

  feels in plan and in section, the different stages of the manufacturing process of a packaging body of rectangular section, in accordance with the invention;

  FIG. 3 represents a front view of the device.

  positive for the implementation of the method according to the invention;

  FIG. 4 represents a plan view of the device

  positive shown in Figure 3; FIG. 5 represents a diagrammatic view on a larger scale and in section, from the left, of the shaping and in place of an internal complex constituted by two strips, at the heat-sealing station of the device according to the invention; FIG. 6 represents a diagrammatic view on a larger scale and in section, from the left, of the shaping and installation of an internal complex constituted by

  a strip at the heat sealing station of the device

  form of the invention; FIG. 7 represents a diagrammatic view on a larger scale and in section, on the left, of the constituent parts of the first layer of a packaging body of rectangular section, at the filling station

  in shape and in place provided, according to a variant of

  reading, only of rollers, of the device according to the invention, FIG. 8 represents a diagrammatic view on a larger scale and in section, from the left, of the parts

  constituting the second layer of a packaging body

  rectangular section, at the shaping station

  and in place provided, according to the same variant embodiment,

  tion, only of rollers, of the device according to the invention, and FIG. 9 (FIGS. 9A, 9B and 9C) represents

  a schematic view on a different scale and in section

  pe, on the left, of the constituent parts of the first layer of a packaging body of rectangular section, at the shaping station and in place provided, according to another alternative embodiment, with rollers and pads,

  of the device according to the invention.

  According to the invention, the method of fa-

  brication is characterized in that it consists in unwinding

  ler at least two strips intended to form the parts 2, 3 constituting the first layer of the body 1 to be produced, to shape them and in place in such a way that they are contiguous, without overlapping, the

  sum of the width of each strip corresponding to the

  rimeter of a packaging body 1, then to unroll at least two strips intended to form the parts 4, 5

  constituting the second layer of the body 1 to be

  ser, to put them in shape and in place by gluing or heat sealing on the first layer so that they are also contiguous without overlapping, but the joints 7 of the bands forming the parts 4, 5 constituting the second layer being substantially offset from the joints 6 of the bands forming the

  parts 2, 3 constituting the first layer, the -

  sum of the width of each strip forming the second layer also corresponding to the perimeter of a body 1

  packaging, to continue, if necessary, these operations

  according to the number of layers planned for-

  sea the packaging body 1, the joints of the bands 6,7 of each possible additional layer being appreciably offset from those of the bands of the previous layer, and finally to cut the different

  layers thus superimposed as a function of the length

  sirée of the packaging body 1, and to evacuate the packaging body 1 obtained (see FIGS. 1B, iC, 2B and 2C

attached drawings).

  According to a first alternative embodiment of

  the invention, the manufacturing process consists, prior to

  completely unrolling the strips intended to form the parts 2, 3 constituting the first layer of the

  body 1 to be produced, to unwind at least one strip 8 of

  intended to constitute the internal watertight complex compatible

  ble with the product to be conditioned from body 1 to be

  then form and place it by thermo-

  continuous sealing, the strips intended to form the

  parts 2, 3 being subsequently bonded or thermoscel-

  lées on the internal complex 8 (Figures lA and 2A).

  The sealed internal complex 8 can be

  titled either by a band folded over on one side 9 and thermo-

  sealed on each side 9, 10 (Figure 6), or in pairs

  strips which are heat sealed on each side 9, 10 (fi-

gure 5).

  According to a first embodiment of a second variant embodiment of the invention, the manufacturing process consists, after shaping and in place

  of the last layer of the body 1 to be made before-

  When cutting, unroll at least one strip 11

  mée intended to constitute the external label, of bodies 1 to be produced, then to shape it and put it in place by

  heat sealing or bonding on the last layer (fig-

res 1D and 2D).

  According to a second embodiment of the second embodiment of the invention, the manufacturing process consists, after the shaping and in place

  of the last layer of the body 1 to be produced, and prior-

  when cutting, unstacking a label in format

  11, then to shape it and put it in place by thermo-

  sealing or bonding on the last layer (Figures 1D

and 2D).

  The invention also relates to a packaging

  ge obtained by application of this process, whose body

  comprises at least two layers superimposed on a material

  riau such as paper, cardboard, metal sheet, material

  synthetic or any other material, charac-

  terized in that each layer is composed of at least two parts 2, 3 or 4, 5, contiguous without overlapping,

  the joints 6 or 7 of a layer being substantially deca-

  strips relative to the joints 7 or 6 of the lower layer

re and / or higher.

  The body 1 will advantageously be composed of two superimposed layers, each consisting of

  exactly two parts 2, 3 or 4, 5, the width of each

  that part 2 to 5 being exactly equal to half the perimeter of the packaging body 1, and the seals 7 of the

  two parts 4, 5 forming the second layer being deca-

  strips at an angle of 90 'to joints 6 of the two

  parts 2, 3 forming the first layer.

  Finally, and as shown in Figures 3 and 4 of the accompanying drawings, the invention also relates to

  a device for implementing this process,

  reCtérized in that it is mainly constituted by a continuous forming machine 12 of the body 1 connected to reels 13 if necessary glueers, one in number per part 2 to 5 constituting each layer of the packaging body, said forming machine 12 comprising

  a mandrel 14 of the desired shape of the packaging body 1

  lage and stations 15, 16 shaping and in place

26 4 4 1 0 3

  of each layer around the mandrel 14 via

  re of rollers 21 or 27 or pads 28 of forming, wheels

  leaux 17 driving the layers thus formed towards a cutter 18 comprising different cutting stations 19, their number being a function of the desired length of the packaging body 1 and each comprising four blades 20 arranged in pairs in opposition to each other 'other. At each layer of the body 1 from the packaging

  corresponds to a station 15 or 16 for shaping and

  this consisting of four rollers 21 or 27 or four pads 28, a station 15 shaping and in place bands arriving from the reels 13 horizontally and preceding a station 16 shaping and in place bands

  coming from the reels 13 vertically, therefore prior-

  twisted, or vice versa (Figures 7, 8 and 9 of

attached drawings).

  According to another characteristic of the invention

  tion, and as shown in Figures 3 and 4 of the accompanying drawings, the forming machine 12 has, in addition, a

  continuous heat sealing station 22, upstream of the pos-

  tes 15 and 16 for shaping and placing layers,

  consisting of four heat-sealing rollers 23, and re-

  linked to a reel 24, if necessary glueer, to one or two rollers, of the strip intended to form the internal complex 8 of the body 1, the section of the mandrel 14 in line with the heat-sealing station 22 of said complex 8 on its banks being lower than that at the post right

  shaping and positioning -15, 16, in order to facilitate the-

says heat sealing.

  In accordance with an additional feature

  the invention 12, the forming machine 12 has, downstream of the last shaping station and in place

  16, and upstream of the drive rollers 17 of the

  ches formed towards the cutter 18, a station 25 for setting

  place and in the form of labels 11 (see Figures 3 and 4).

2644 103

  The station 25 for placing labels 11 is connected either to a reel 26, if necessary a glue dispenser, of the strip intended to form said labels, or to a feeder previously unstacking the labels 11 one after the other. Thanks to this device, it is therefore possible, for example, to carry out the manufacturing process in the following manner: - unwinding of a strip 8 intended to form the internal complex, - shaping and positioning of this complex 8 at the

  heat sealing 22 (Figures 1A and 2A); the integrated complex

  laugher 8 composed of two strips of the same width (figure) or of a folded strip (figure 6) is unrolled and heat-sealed continuously at the heat-sealing station 22 constituted by four rollers 23, on its edges around the tail of the shaped mandrel 14, then pulled on it by means of the bands intended to form the parts 2 to 5; by virtue of the section of the mandrel 14 in line with the heat sealing cap 22, less than the section of the rest of the mandrel 14, the heat sealing is

  greatly facilitated, since there is a large space

  both between the complex 8 and the mandrel 14;

  - unwinding of the two strips intended to form the par-

  ties 2, 3 constituting the first layer - shaping and positioning of these strips (FIGS. 1B and 2B) along two opposite U's around the mandrel 14; this operation can be carried out, for example, by means of four vertical rollers 21, two upper and two lower, the station 15 shaping and placing strips arriving from the reels 13 horizontally (FIG. 7) it can also be carried out, for example, thanks to two pressure rollers 27 arranged before four skids of

  shape 28, themselves preceding two new rollers

  3 seurs 27; if the first two rollers 27 are horizontal-

  rate, the last two rollers 27 are vertical (Figure 9), or vice versa; - unwinding of the two strips intended to form the parts 4, 5 constituting the second layer; - Shaping and positioning of these strips (Figures 1C and 2C) along two U around the mandrel 14, but offset by 900 relative to those of the first layer; this operation can be carried out in the same way as for the first bands (see for example FIG. 8 of the appended drawings, the bands arriving from the reels 13 vertically, including previously twisted, and the rollers 21 being arranged horizontally); - if necessary, continuation of these operations if more than two layers are planned;

  - unwinding of a printed strip 11, intended to constitute

  kill the external tag; - shaping and positioning of this strip (FIGS. 1D and 2D) at station 25 of the forming machine 12; the label 11 is unrolled and glued continuously, then

  applied and formed around the last previous layer

  duly carried out, and drawn by it; if the label 11 is not in reel, but in format, a feeder will unstack a label 11 after the other; they will then be glued and pressed under the body 1, then formed around; - Cutting the different layers thus superimposed on the different cutting stations 19, the latter each comprising four blades-20 arranged in pairs in opposition to one another; it is therefore a cut "on the fly";

  - Evacuation of the packaging body 1 thus obtained.

  We thus obtain, thanks to this manufacturing process, a perfectly sealed packaging body 1 without any particularly weakened generator, mainly due to the significant offset of the seals 6 and 7 relative to each other, these seals being

  somehow evenly distributed over the entire peri-

packing body 1 meter.

  Of course, the invention is not limited to the embodiment described and shown in the accompanying drawings. Modifications remain possible, in particular from the point of view of the constitution of the various elements

  or by substitution of technical equivalents, without

  provided, however, from the scope of protection of the invention.

2644 1 03

* R E V E N D I C A-T I ONS

  1. Method for manufacturing a body of an em-

  tubular bundling comprising at least two layers

  made of a material such as paper, cardboard, foil

  of metal, synthetic material, or any other material

  res, characterized in that it consists in unwinding at least two strips intended to form the parts (2, 3)

  constituting the first layer of the body (1) to be reacted

  read, shape and place in such a way

  re that they are contiguous, without overlapping, the som-

  me of the width of each strip corresponding to the peri-

  meter of a packaging body (1), then to unroll at least two strips intended to form the parts (4, 5)

  constituting the second layer of the body (1) to be

  ser, to put them in shape and in place by gluing or heat-sealing on the first layer so that they are also contiguous without overlapping, but the joints (7) of the bands forming the parts (4,) constituting the second layer being substantially offset from the seals (6) of the bands forming the parts (2, 3) constituting the first layer,

  the sum of the width of each strip forming the second

  layer also corresponding to the perimeter of a packaging body (1), to continue, if necessary, these operations depending on the number of layers provided to form the packaging body (1), the seals (6, 7 ) strips of each additional layer possibly being substantially offset from those of the strips of the previous layer, and finally to make the cut of the different layers thus superimposed as a function of the desired length of the body (1) of packaging, and to evacuate

the packaging body (1) obtained.

  2. Manufacturing process according to the claim

  tion 1, characterized in that it consists beforehand

2644 1 03

  the unwinding of the bands intended to form the parts (2, 3) constituting the first layer of the body (1) to be produced, to unwind at least one band (8) intended to constitute the sealed internal complex compatible with the product to be packaged, of the body (1) to be produced, then to form it and in place by continuous heat-sealing, the strips intended to form the parts (2, 3) being subsequently bonded or heat-sealed on the

internal complex (8).

  3. Manufacturing process according to the claim

  tion 2, characterized in that the sealed internal complex (8) is constituted either by a strip folded over on one side (9) and heat-sealed on each side (9, 10), or by two strips which are heat-sealed on each side

(9, 10).

  4. Manufacturing method according to any one

  as claims 1 to 3, characterized in that it

  consists, after the shaping and in place

  of the last layer of the body (1) to be produced, and previously

  when cutting, unrolling at least one printed strip (11) intended to constitute the external label of the body (1) to be produced, then shaping and

  place by heat sealing or gluing on the last layer

che.

  5. Manufacturing method according to any one

  as claims 1 to 3, characterized in that it

  consists, after the shaping and in place

  of the last layer of the body (1) to be produced, and previously

  when cutting, unstacking a label in format (11), then shaping and putting it in place by thermo-

  sealing or bonding on the last layer.

  6. Packaging obtained by application of the process

  according to any one of claims 1 to 5, the

  body includes at least two layers superimposed in one

  material such as paper, cardboard, metal foil, ma-

  synthetic or any other material, packaging characterized in that each layer is composed of at least

  at least two parts (2, 3 or 4, 5), joined without repeating

  cover, the joints (6 or 7) with a layer being sensitive

  clearly offset from the joints (7 or 6) of the lower and / or upper layer.

  7. Packaging according to claim 6, charac-

  terized in that the body (1) is advantageously composed

se of two superimposed layers.

  8. Packaging according to any one of the res-

  dications 6 and 7, characterized in that each layer

  advantageously consists of exactly two parts

ties (2, 3 or 4, 5).

  9. Packaging according to claim 8, charac-

  terized in that the width of each part (2 to 5) is exactly equal to half the perimeter of the packaging body (1).

  10. Packaging according to claim 9, charac-

  terized in that the joints (7) of the two parts (4, 5) forming the second layer are offset by an angle of 90 relative to the joints (6) of the two parts (2, 3)

forming the first layer.

  11. Device for implementing the program

  assigned according to any one of claims 1 to 5

  for the manufacture of a package according to any one

  as claims 6 to 10, characterized in that it

  consists of a continuous forming machine (12) of the body (1), connected to reels (13) if necessary

  glueers, one per part (2 to 5) made up

  killing each layer of the packaging body, said ma-

  forming china (12) comprising a mandrel (14) of the desired shape of the packaging body (1) and stations (15, 16) for shaping and placing each layer around the mandrel (14) by the '' roller intermediate (21

  or 27) or forming pads (28), rollers (17) in

  dragging the layers thus formed towards a cutter (18) comprising different cutting stations (19), their number being a function of the desired length of the packaging body (1) and each comprising four blades (20) arranged in pairs in opposition l 'one over the other. 12. Device according to claim 11, ca-

  characterized in that at each layer of the body (1) of the em-

  balling corresponds to a station (15 or 16) for shaping and in place consisting of four rollers (21 or 27) or four pads (28), a station (15) shaping and

  place strips coming from the reels (13) horizontally

  Lement and preceding a post (16) shaping and

  place strips coming from the reels (13) vertical-

  ment, therefore previously twisted, and vice versa.

  13. Device according to any one of the re-

  vendications 11 and 12, characterized in that the machine

  forming machine (12) also has a thermo station

  sealing (22) continuously, upstream of the shaping stations (15 and 16) and in place of the layers, consisting of

  four heat-sealing rollers (23), and connected to a

  drain (24), if necessary glueer, one or two wheels

  leaux, of the strip intended to form the internal complex (8) of the body (1), the section of the mandrel (14) at the right of the heat-sealing station (22) of said complex (8) on its edges being less than that at the right shaping stations and in place (15, 16), to facilitate

said heat sealing.

  14. Device according to any one of the re-

  vendications 11 to 13, characterized in that the forming machine (12) has, downstream of the last post of

  shaping and positioning (16), and upstream of the

  the drive waters (17) of the layers formed towards the

  cutter (18), a station (25) for positioning and forming

me of labels (11).