EP4192676A1 - Machine et procédé destinés à fabriquer des produits tubulaires - Google Patents

Machine et procédé destinés à fabriquer des produits tubulaires

Info

Publication number
EP4192676A1
EP4192676A1 EP21759173.4A EP21759173A EP4192676A1 EP 4192676 A1 EP4192676 A1 EP 4192676A1 EP 21759173 A EP21759173 A EP 21759173A EP 4192676 A1 EP4192676 A1 EP 4192676A1
Authority
EP
European Patent Office
Prior art keywords
strip
shaped elements
adhesive substance
elements
heating elements
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.)
Pending
Application number
EP21759173.4A
Other languages
German (de)
English (en)
Inventor
Fiorenzo Draghetti
Federico ZANETTIN MISLEY
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.)
IMA Industria Macchine Automatiche SpA
Original Assignee
IMA Industria Macchine Automatiche 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 IMA Industria Macchine Automatiche SpA filed Critical IMA Industria Macchine Automatiche SpA
Publication of EP4192676A1 publication Critical patent/EP4192676A1/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • B31C—MAKING WOUND ARTICLES, e.g. WOUND TUBES, OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31C3/00—Making tubes or pipes by feeding obliquely to the winding mandrel centre line
    • 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
    • B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
    • B31D5/00—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles
    • B31D5/0095—Making drinking straws
    • 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
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F5/00—Attaching together sheets, strips or webs; Reinforcing edges
    • B31F5/04—Attaching together sheets, strips or webs; Reinforcing edges by exclusive use of adhesives

Definitions

  • the present invention concerns a machine and a method to make tubular products which can be used, in particular, but not only, to produce straws for drinking a liquid or semi-liquid product.
  • the tubular products are made by helically winding on a forming mandrel one or more strip-shaped elements, preferably made of paper or its derivatives, on at least one of which an adhesive substance, for example a glue containing a liquid solvent, has previously been deposited.
  • the machine described here is provided with an evaporation apparatus which is based on heating, by irradiation and/or conduction, the strip-shaped elements on which the adhesive substance has been deposited, in order to remove at least a part of the liquid solvent by means of the Joule effect, before winding the strip-shaped elements onto the forming mandrel.
  • filament winding can be used to manufacture cylindrical bodies, for example tubular, by helically winding one or more strip-shaped elements made of paper under tension around a cylindrical forming pin, or mandrel, after having deposited or spread one or more layers of adhesive substance, for example glue, on at least one surface of the one or more strip-shaped elements.
  • each strip-shaped element with which the latter are formed is very thin, in the range of tenths of a millimeter or, at times, even hundredths of a millimeter.
  • the glue must absolutely not come into contact with the liquid or semi-liquid product that passes through the straw, in order to prevent part of the glue from being accidentally ingested by the user.
  • drying means in some cases significantly increases the overall bulk of the machine, or, in other cases, it does not guarantee an effective drying action, for example because the drying means act on a very short stretch of the path of the strip-shaped elements, or they are disposed too close to the forming mandrel so that the glue does not have sufficient time to dry.
  • apparatus which can remove, by evaporation, at least a part of the liquid solvent contained in the glue, advantageously before the strip-shaped elements enter a forming unit in which the forming pin is located, and that this apparatus can be easily inserted into the machine to make tubular products, preferably made of paper, usable in particular, but not only, for the production of straws.
  • productivity expressed in meters of tubular product made in the unit of time, which corresponds to the speed at which the individual strip-shaped elements must be made to advance toward the forming unit.
  • productivity expressed in meters of tubular product made in the unit of time, which corresponds to the speed at which the individual strip-shaped elements must be made to advance toward the forming unit.
  • productivity expressed in meters of tubular product made in the unit of time, which corresponds to the speed at which the individual strip-shaped elements must be made to advance toward the forming unit.
  • productivity expressed in meters of tubular product made in the unit of time, which corresponds to the speed at which the individual strip-shaped elements must be made to advance toward the forming unit.
  • the speed of feed of the strip-shaped elements must be a few meters per second, for example from 1 to 2 m/s.
  • the evaporation apparatus must also be compact, but it must guarantee at the same time and in a small space, an excellent removal of a predetermined quantity, preferably programmable, of the liquid solvent contained in the adhesive substance.
  • one purpose of the present invention is to provide a machine and a method to make tubular products, preferably made of paper, which are simple and reliable, and which allow, in a limited space, to remove by evaporation a predetermined quantity, preferably programmable, of the liquid solvent contained in the adhesive substance used to form said tubular products.
  • Another purpose of the present invention is to provide a machine and a method to make tubular products, preferably made of paper, in which it is possible to accurately regulate the quantity of thermal energy used to remove by evaporation at least a part of said liquid solvent.
  • the Applicant has devised, tested and embodied the present invention to overcome the shortcomings of the state of the art and to obtain these and other purposes and advantages.
  • the embodiments concern a machine to make tubular products, preferably straws, using one or more strip-shaped elements, preferably made of paper or its derivatives or suchlike.
  • the machine comprises delivery means configured to selectively deliver on at least one surface of at least one of the strip-shaped elements an adhesive substance containing at least a liquid solvent, and forming means configured to form the tubular product by winding the one or more strip-shaped elements in a helical manner and simultaneously gluing them, by means of the adhesive substance.
  • the machine as above also comprises an evaporation apparatus comprising a plurality of heating elements for each of the strip-shaped elements as above; each of these heating elements has one or more electric resistances and is configured to selectively remove, by evaporation, at least a part of the liquid solvent contained in the adhesive substance.
  • the electric resistances are mounted on each of the heating elements as above; these elements being configured to heat, preferably by irradiation and/or conduction, directly or indirectly, the adhesive substance to cause the at least partial evaporation of the liquid solvent.
  • each of the heating elements as above is mobile between an idle position, in which it is located at a determinate distance from the strip-shaped elements, and an operating position, in which it is in contact with, or in the proximity of, the strip-shaped elements, or vice versa, preferably keeping the one or more electric resistances mounted on it energized.
  • the evaporation apparatus also comprises adjustment means associated with the heating elements and configured to selectively adjust the quantity of thermal energy transmitted to the adhesive substance, by acting selectively on the distance of the heating elements from the strip-shaped elements on which the adhesive substance is present, in order to vary their distance from the strip-shaped elements, between the operating position and the idle position.
  • the adjustment means act on the current intensity and/or on the energizing time, with which each of the electric resistances is energized.
  • the adjustment means comprise a central control unit and actuation means controlled thereby; moreover, the actuation means are configured to selectively move each of the heating elements from the idle position to the operating position, and vice versa.
  • the heating elements are preferably disposed in correspondence with a surface of the strip-shaped elements opposite to that on which the adhesive substance is present.
  • At least one heating element for each of the strip-shaped elements on which the adhesive substance is present; moreover, if there is more than one strip-shaped element on which the adhesive substance is present, correspondingly there is also more than one heating element.
  • each of the strip-shaped elements on which the adhesive substance is present there are preferably at least two heating elements, more preferably at least three heating elements and even more preferably at least four heating elements; moreover, the heating elements associated with each of the strip-shaped elements on which the adhesive substance is present are aligned with each other parallel to the corresponding strip-shaped element.
  • the evaporation apparatus is preferably disposed between the delivery means and the forming means of the machine.
  • a method is provided to make tubular products using one or more strip-shaped elements, preferably made of paper, or similar materials, or its derivatives, comprising a delivery step, in which delivery means selectively deliver on at least one surface of at least one of the one or more strip-shaped elements an adhesive substance containing at least a liquid solvent, and a forming step, in which forming means form the tubular product by winding the one or more strip-shaped elements in a helical manner and simultaneously gluing them, by means of the adhesive substance.
  • the method as above also comprises an evaporation step in which a plurality of heating elements for each of the stripshaped elements, each having one or more electric resistances, are selectively activated in order to remove, by evaporation, at least a part of the liquid solvent contained in the adhesive substance.
  • an evaporation apparatus is suitable to be installed in a machine configured to make a tubular product using one or more strip-shaped elements, preferably made of paper or its derivatives or suchlike, wherein the machine itself is provided with delivery means configured to selectively deliver on at least one surface of at least one of the strip-shaped elements an adhesive substance containing at least a liquid solvent.
  • the evaporation apparatus comprises a plurality of heating elements, each having one or more electric resistances, and configured to selectively remove, by evaporation, at least a part of the liquid solvent contained in the adhesive substance present on at least one of the strip-shaped elements.
  • a method to evaporate at least a part of a liquid solvent contained in an adhesive substance present on at least one surface of at least one or more strip-shaped elements, preferably made of paper, used to make tubular products comprises an evaporation step in which one or more heating elements, each having one or more electric resistances, are selectively activated in order to remove, by evaporation, at least a part of the liquid solvent contained in the adhesive substance.
  • the evaporation step as above there is a heating, preferably by irradiation and/or conduction, directly or indirectly, of the adhesive substance by the heating elements.
  • an adjustment step can also be provided, in which adjustment means associated with each of the heating elements selectively adjust the quantity of thermal energy transmitted to the adhesive substance, varying the distance of each of the heating elements from the strip-shaped elements on which the adhesive substance is present.
  • the adjustment step provides to alternatively take each heating element of the plurality of heating elements to an idle position, in which it is located at a determinate distance from the one or more strip-shaped elements, or to an operating position, in which it is in contact with, or in the proximity of, the strip-shaped elements.
  • the adjustment step comprises a step of controlled energizing of the electric resistances, in which the adjustment means, in addition to acting selectively on the distance of each of the heating elements from the strip-shaped elements, also act on the current intensity and/or on the energizing time with which each of the electric resistances is energized.
  • the evaporation means are part of an evaporation apparatus, which at least during the evaporation step as above is stationary in a determinate position.
  • the strip-shaped elements on which the adhesive substance is present pass through the evaporation apparatus, in front of the heating elements, at a determinate effective speed of advance.
  • the step of controlled energizing of the electric resistances as above occurs as a function of the effective speed of advance.
  • - fig. 1 is a partial and schematic front view of an evaporation apparatus installed in a machine to make tubular products;
  • - fig. 2 is a schematic perspective view of the apparatus of fig. 1 ;
  • - fig. 3 is another schematic perspective view of the apparatus of fig. 1, in which some parts have been removed in order to show its interior;
  • - fig. 4 is a left lateral view of the part of the apparatus of fig. 3;
  • - fig. 5 is a front view of the part of the apparatus of fig. 3.
  • Fig. 1 shows a diagram in which there is a machine 100 for the automated production of tubular products A, preferably made of paper, also suitable to form straws, then cutting each tubular product A to size, in any known manner whatsoever.
  • the machine 100 comprises an evaporation apparatus 10, as described in detail below.
  • the machine 100 which comprises means 20 for delivering an adhesive substance S containing at least a liquid solvent, and forming means 16 configured to form the tubular product A. It is understood that the machine 100 could be, in particular in relation to the other components or devices present therein, of any other type whatsoever, whether known or to be developed in the future.
  • the machine 100 can comprise a feed unit 11, configured to rotatably support one or more reels, for example three, 12, 13 and 14, each of which is formed with a corresponding strip-shaped element B (indicated respectively with Bl, B2 and B3) wound in a spiral, and a forming unit 15, disposed downstream of the feed unit 11 and configured to form the tubular product A by appropriately winding, in a helical manner, the three strip-shaped elements Bl, B2 and B3 onto the forming means 16, which in this specific case comprise a pin, or mandrel 17, disposed along a longitudinal axis X, for example horizontal.
  • the forming unit 15 can be, for example, of the type described in patent application IT 102020000011344 filed by the Applicant.
  • the machine 100 also comprises a delivery unit 19 provided with the delivery means 20 which are configured to selectively deliver on at least one surface of at least one or more strip-shaped elements, for example on two of them, B 1 and B2, an adhesive substance S containing at least a liquid solvent, while a third stripshaped element B3 is guided directly by the corresponding reel 12 to the forming unit 15.
  • First guide means 18, for example consisting of a plurality of first rollers, are disposed between the reels 12, 13 and 14 in order to guide the three stripshaped elements B in an appropriate manner between the feed unit 11 and the forming unit 15 in a first substantially horizontal direction.
  • the thickness of the adhesive substance S deposited on each stripshaped element Bl and B2 is of the order of micrometers, for example from about 10 pm to about 50 pm.
  • the theoretical speed of advance V at which the three strip-shaped elements Bl, B2 and B3 should be transferred from their reels 12, 13 and 14 to the forming unit 15 is for example comprised between about 1 and 2 m/s, which corresponds to a productivity of the machine 100 of about 60 to 120 m/min of tubular product A. In some cases, the speed of advance V can reach up to 4 m/s.
  • the apparatus 10 comprises evaporation means 23, which are configured to selectively remove, in a controlled manner, by evaporation caused by a heat source, at least a part of the liquid solvent contained in the adhesive substance S deposited on the strip-shaped elements B, in the example provided here Bl and B2, before the latter cooperate with the forming means 16.
  • the evaporation means 23, which will be described in detail below, are disposed inside a box-like body 25 (fig. 2) having a fixed part 26, hollow internally and without upper and lower walls.
  • a closing door 27 is hinged on the fixed part 26 and can be selectively opened by means of a handle 28.
  • the boxlike body 25 has an oblong shape and is disposed in a substantially vertical direction, preferably above the delivery unit 19, that is, functionally between the latter and the forming unit 15. This has the advantage, among other things, of reducing the space in the horizontal direction between the delivery unit 19 and the forming unit 15, and of speeding up the production process of the tubular element A.
  • second guide means 29 positioned so as to guide the strip-shaped elements Bl and B2 between the delivery means 23 along a segmented path (fig. 5) which is disposed parallel, or slightly arched, with respect to the second substantially vertical direction mentioned above.
  • Each strip-shaped element Bl and B2 is suitably guided so that only its surface without adhesive substance S comes into contact with the guide means 18 and 29, with suitable loop means between one roller and the next, where required.
  • the evaporation means 23 are functionally disposed between the delivery means 20 and the forming means 16, that is, immediately downstream of the delivery means 20 and upstream of the forming means 16, so that the strip-shaped elements B come into contact with the pin 17 after the adhesive substance S has conveniently dried in order to not overflow from the strip-shaped elements B and make the latter adhere to each other well and quickly.
  • the heat source as above comprises heating means, configured as one or more heating elements 30, in each of which there is inserted an electric resistance 31 of a known type and schematically shown in fig. 5.
  • heating elements 30 consist of, or comprise, heating lamps, for example infrared.
  • Each electric resistance 31 can be energized selectively and in an adjustable manner under the command of a central control unit 32, which can be of any known type whatsoever, or which will be developed in the future.
  • the central control unit 32 can be either the same one that can be present in the machine 100 and that controls, in a programmed manner, at least also the functioning of the forming means 15 and of the delivery means 19, or an autonomous one dedicated only to the control of the evaporation means 23, on the basis of information on the effective speed of advance VN of the strip-shaped elements B and possibly also of other parameters, such as for example the temperature and humidity in the location where the apparatus 10 is installed and/or other parameters useful for the optimization of the evaporation process.
  • the same central control unit 32 is configured to selectively adjust the quantity of thermal energy transmitted by the heating elements 30 to the adhesive substance S present on each strip-shaped element B, for example by acting selectively on the distance of each of the heating elements 30 from the corresponding strip-shaped element B on which the adhesive substance S is present, or on the current intensity and/or on the energizing time with which each of the electric resistances 31 is energized.
  • the apparatus 10 is configured to simultaneously treat two strip-shaped elements B, but it is clear that it can be sized in order to treat even just one, or three or even more. In fact, one of the characteristics of the apparatus 10 is modularity and that it can be expanded as desired.
  • heating elements 30 there are eight heating elements 30 and these are divided into four groups, respectively 30A, 30B, 30C and 30D (figs. 3 and 4), which are disposed vertically aligned and slightly spaced apart; moreover, each group is formed by two heating elements 30 aligned horizontally, that is, one for each of the two strip-shaped elements Bl and B2.
  • each strip-shaped element B can be affected by a variable number of heating elements 30, for example from one to four, as will be described in detail below.
  • all the heating elements 30 face the surface of the strip-shaped elements B 1 and B2 opposite to that on which the adhesive substance S has been deposited.
  • each of the four groups of heating elements 30 A, 30B, 30C and 30D (figs. 4 and 5) is selectively mobile between an idle position, in which it is moved away from the strip-shaped elements Bl and B2 by a determinate distance, for example of a few tens of millimeters, and an operating position, in which it is in contact with, or in the proximity of, the strip-shaped elements Bl and B2, or vice versa.
  • each group of heating elements 30 A, 30B, 30C and 30D between the idle and the operating positions is carried out by a corresponding actuator 33, that is, 33A, 33B, 33C and 33D respectively (figs, from 2 to 5), for example of the pneumatic type, which is known, commanded individually by the central control unit 32.
  • each of the heating elements 30 can be driven autonomously and can be commanded by a corresponding actuator 33 driven by the central control unit 32.
  • the functioning of the apparatus 10, which also corresponds to the evaporation method described here, is coordinated with the functioning of the machine 100, that is, the method to make the tubular products A, and advantageously occurs entirely in an automated manner under the control of the central control unit 32.
  • the functioning of the machine 100 comprises a dragging step in which the strip-shaped elements Bl, B2, B3 are dragged directly by the forming means 16 which make them suitably unwind from the respective reels 12, 13 and 14, and make each strip-shaped element on which to deposit the adhesive substance S, that is, in the example provided here, the strip-shaped elements Bl and B2, pass first through the delivery unit 19 and then through the apparatus 10, while the third strip-shaped element B3 on which the adhesive substance S does not have to be deposited by-passes the delivery unit 19 and the apparatus 10.
  • the theoretical speed of advance V of the strip-shaped elements B is determinate a priori, as a function of the productivity to be achieved, as explained above, and is stored in a memory associated with the central control unit 32.
  • three speed of advance thresholds are stored, respectively VI, V2 and V3, wherein the first threshold VI is the lowest speed of advance of the three and the third threshold V3 is the highest speed of advance of the three.
  • Speed sensors of a known type and not shown in the drawings are able to detect the effective speed of advance VN of the strip-shaped elements B and to communicate it to the central control unit 32.
  • a delivery step occurs in the delivery unit 19, in which the delivery means 20 deposit the adhesive substance S on the strip-shaped elements B 1 and B2, such delivery step being immediately followed by an evaporation step in the apparatus 10, in which the evaporation means 23 make at least a part of the liquid solvent contained in the adhesive substance S just deposited on the same strip-shaped elements B 1 and B2 evaporate.
  • a first operating condition shown in fig.
  • the central control unit 32 only commands the actuation of the actuator 33A so that only the first group of heating elements 30 A, for example the lowest one, is taken from the idle position to the actuation position, while the other three groups of heating elements 30B, 30C and 30D remain in their idle position, but with the their electric resistances 31 energized.
  • the central control unit 32 also commands the actuation of the actuator 33B so that in addition to the first group of heating elements 30 A, the second group of heating elements 30B is also taken from the idle position to the actuation position, while the other two groups of heating elements 30C and 30D remain in their idle position, but with their electric resistances 31 energized.
  • the central control unit 32 also commands the actuation of the actuator 33C so that in addition to the first group of heating elements 30A and to the second group of heating elements 30B, the third group of heating elements 30C is also taken from the idle position to the actuation position, while the fourth group of heating elements 30D remains in its idle position, but with the corresponding electric resistances 31 energized.
  • a fourth operating condition shown in fig. 3, when the effective speed of advance VN of the strip-shaped elements B, detected by the speed sensors, is greater than that of the third speed of advance threshold V3, then the central control unit 32 also commands the actuation of the actuator 33D so that the fourth group of heating elements 30D is also taken from the idle position to the actuation position, so that all the heating elements 30 contribute to effect the evaporation of the adhesive substance S.
  • the central control unit 32 will correspondingly command, in an inverse manner, the actuators 33, if the effective speed of advance VN of the strip-shaped elements B falls below each of the three speed of advance thresholds VI, V2 or V3.
  • the central control unit 32 by controlling the actuators 33 in the manner described above, allows to adjust the quantity of thermal energy transmitted by the heating elements 30 to the stripshaped elements B without having to frequently energize/de-energize the electric resistances 31 , even if, as an alternative to the selective movement of the heating elements 30, the adjustment of the quantity of thermal energy as above could be carried out in another way, for example by adjusting the current intensity and/or the energizing time with which each of the electric resistances 31 is energized.
  • a temperature sensor or a thermocouple of a known type and not shown in the drawings, can be installed in the apparatus 10 in order to signal to the central control unit 32 when a determinate threshold temperature, which can be set when setting up the apparatus 10, has been exceeded, in order to possibly stop the entire machine 100 or deactivate one or more heating elements 30 or deenergize one or more electric resistances 31.
  • the central control unit 32 is programmed to block the energizing of the electric resistances 31 if a sensor associated with the closing door 27 detects that the latter has been opened, even inadvertently or accidentally.
  • the evaporation step is then followed by a forming step, carried out by the machine 100, in which the three strip-shaped elements Bl, B2 and B3 are wound on the pin 17 (fig. 1) in a helical manner, for example in the winding sense R, and at the same time are glued together by means of the adhesive substance S interposed between them. Therefore, based on what described above, it is evident that having the evaporation means 23 based on heating means that have one or more electric resistances is very advantageous and allows to obtain surprising results.
  • the apparatus 10 it is possible to program and control, even instantly, the quantity of liquid solvent, contained in the adhesive substance S, to be removed by evaporation, under the control of the central control unit 32.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne une machine (100) destinée à fabriquer des produits tubulaires (A), de préférence des pailles, à l'aide d'un ou de plusieurs éléments en forme de bande (B), de préférence en papier, en dérivés de celui-ci ou analogues, comprenant un moyen de distribution (20) conçu pour délivrer sélectivement sur au moins une surface d'au moins l'un desdits éléments en forme de bande (B) une substance adhésive (S) contenant au moins un solvant liquide, ainsi qu'un moyen de formage (16) conçu pour former le produit tubulaire (A) en enroulant ledit ou lesdits éléments en forme de bande (B) de manière hélicoïdale et en les collant simultanément au moyen de la substance adhésive (S), et comprenant également un appareil d'évaporation pourvu d'éléments chauffants (30) conçus pour éliminer sélectivement, par évaporation, au moins une partie du solvant liquide contenu dans la substance adhésive (S) présente sur les éléments en forme de bande (B).
EP21759173.4A 2020-08-04 2021-08-03 Machine et procédé destinés à fabriquer des produits tubulaires Pending EP4192676A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT202000019141 2020-08-04
PCT/IT2021/050245 WO2022029817A1 (fr) 2020-08-04 2021-08-03 Machine et procédé destinés à fabriquer des produits tubulaires

Publications (1)

Publication Number Publication Date
EP4192676A1 true EP4192676A1 (fr) 2023-06-14

Family

ID=72885979

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21759173.4A Pending EP4192676A1 (fr) 2020-08-04 2021-08-03 Machine et procédé destinés à fabriquer des produits tubulaires

Country Status (2)

Country Link
EP (1) EP4192676A1 (fr)
WO (1) WO2022029817A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1698260A (en) * 1927-06-15 1929-01-08 M D Knowlton Co Tube-forming machine
US2931278A (en) * 1957-07-12 1960-04-05 Rolf L Ignell Method and apparatus for the continuous production of drinking straws and the like
FR2303663A1 (fr) * 1975-03-12 1976-10-08 Fiberpot Ab Dispositif et appareil pour la fabrication de tubes cylindriques
US6270004B1 (en) * 1999-08-30 2001-08-07 Sonoco Development, Inc. Tubular composite containers having unsupported film liners and methods and apparatus for making same
JP2002028995A (ja) * 2000-07-13 2002-01-29 Fuji Denpa Koki Kk 紙管原紙の予熱方法および装置

Also Published As

Publication number Publication date
WO2022029817A1 (fr) 2022-02-10

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