KR20180108624A - METHOD AND MACHINE FOR MANUFACTURING MULTILAYER CYLINDRICAL TUBULAR ROD Fragments Used to Manufacture a Substantially Cylindrical Smoking Device, and Fragments Produced by Such a Method and Machine - Google Patents

Abstract

A machine (100) for manufacturing fragments of a multi-layer cylindrical tubular rod (1) suitable for producing a substantially cylindrical smoking article comprises first means (101) for feeding at least a first continuous web (102) A second means 103 for feeding a second continuous web 104, means 107 for forming a continuous multi-layer web M by superimposing at least a first layer 2 and a second layer 5, And means (108) for feeding the continuous multi-layer web along the feed direction (X). Means 110 for forming the rod 1 around the feed direction X and means 111 for cutting the rod 1 into pieces are also provided. The machine 100 is configured to arrange at least one of the lateral edges 4,7 of the first and second layers 2 and 5 in a manner that produces at least one end metamaterial 3,6 . The machine 100 implements a method for manufacturing fragments of a multi-layer cylindrical tubular rod 1.

Description

METHOD AND MACHINE FOR MANUFACTURING MULTILAYER CYLINDRICAL TUBULAR ROD Fragments Used to Manufacture a Substantially Cylindrical Smoking Device, and Fragments Produced by Such a Method and Machine

The present invention relates to a method and a machine for making a multi-layer cylindrical tubular rod segment suitable for making a substantially smoker's article.

The present invention also relates to a multi-layer cylindrical tubular rod segment suitable for making smoking articles which are substantially prismatic.

Prior art machines used to make smoking articles are known, as described in patent application WO2014 / 188318, and are available in a multi-layered web comprising strips suitable for imparting the desired properties, The cylindrical part of the product is wrapped. For example, the strips are made of a metal material or a plastic material. Thus, the machine described in WO2014 / 188318 is suitable for directly producing pieces of a smoking article by wrapping a multi-layered web around a cylindrical part.

Thus, there is currently no machine or method that can provide, with multilayer cylindrical tubular rod segments, the cylindrical parts required for manufacturing a smoking article, which are suitable for subsequently filling the fragments in the axial direction. In this case it is in fact necessary to have a multi-layer cylindrical tubular rod segments satisfying strict dimensional and shape tolerances, in particular with regard to the internal diameter, which must accommodate the abovementioned parts.

At present, conventional machines and methods are subject to errors in positioning and / or alignment of individual layers of the multi-layer web, and phase shifts between process stations due to, for example, Tolerance can not be satisfied.

The present invention aims to provide a method and a machine for manufacturing multi-layer cylindrical tubular rod segments, overcoming the above-mentioned disadvantages associated with the prior art.

More specifically, it is an object of the present invention to provide a method and a machine for manufacturing multi-layer cylindrical tubular rod segments, and a method and a machine capable of providing rod segments satisfying strict numerical and geometric tolerances, particularly with respect to the inner diameter .

It is a further object of the present invention to provide a method and a machine for producing multi-layer cylindrical tubular rod segments, which can be adapted to produce various types of products, in particular to ensure complete closure along the circumferential direction, And to provide a method and a machine for manufacturing a reliable product that ensures correct positioning in the circumferential and longitudinal directions.

It is a further object of the present invention to provide a method of making a smoking article which is suitable for producing a substantially cylindrical smoking article and which ensures that the sealing between the piece and the part is ensured in such a way that, So that it can be inserted easily.

These objects are achieved by a method and a machine for manufacturing a multi-layered cylindrical tubular rod segment having the features described in one or more of the appended claims.

These objects are achieved by means of a multi-layer cylindrical tubular rod segment having the features described in one or more of the appended claims, suitable for manufacturing substantially cylindrical smoking articles.

Advantageously, by performing the method steps in a single machine, it is possible to prevent the phase from being displaced along the feed direction.

It is also possible to reduce the shape and size irregularity of the fragments by wrapping the continuous multi-layer web around the feed direction to form the multi-layer cylindrical tubular rod and creating at least one end-to-end splice, This makes it possible to satisfy specific shape and size tolerances.

Advantageously, the obtained rod segment comprises a first continuous layer comprising a first layer comprising a first joint, a second continuous layer comprising a second joint, and optionally a third joint, At least one of the first and second joints is made as an endless joint.

Preferably, a first material is used, wherein the first material comprises at least one of a metallic material, a plastic material, and a paper material.

Preferably, first, second and third layers are used, the second and third layers having the same thickness. For example, layers having the same thickness are obtained by feeding a single continuous web and dividing it into two successive web portions that define a second continuous web and a third continuous web. Alternatively, the second layer and the third layer have different thicknesses.

Preferably, the first and second joints are end-to-end joints. The third joint may be an endless offset that is offset relative to the first or second joint, or preferably an overlying joint that is offset relative to the first or second joint.

Additional features and advantages of the present invention will be set forth in the description which follows and a preferred non-limiting description and a non-limiting example of a segment of a multi-layer cylindrical tubular rod suitable for manufacturing a substantially cylindrical smoking article, And more particularly, from a method and a machine for producing fragments of a multi-layer cylindrical tubular rod suitable for producing a cylindrical smoking article.

The present invention is described below with reference to the accompanying drawings, which illustrate non-limiting embodiments of the invention.

1A, 1B and 1C each show a cross-section, a product schematic and a longitudinal section of a first embodiment of a multi-layer cylindrical tubular rod.
Figs. 2A to 2C, 3A to 3C, 4A to 4C, and 5A to 5C respectively show a modification of Figs. 1A, 1B and 1C.
Figures 6A-6C show further variants of Figures 1A, 1B and 1C, and Figure 6D is an additional product schematic.
Fig. 7 is a schematic front view of a machine for manufacturing filter rod segments of a multi-layer cylindrical tubular rod according to the first embodiment. Fig.
Figure 8 is a schematic front view of a machine for manufacturing fragments of a multi-layer cylindrical tubular rod according to a second embodiment.
9 is an enlarged detail view of Fig.
Fig. 10 is a detailed side view of Fig. 9. Fig.
11 is an enlarged detail view of Fig.
12 is a detailed side view of Fig.

Referring to the attached drawings, reference numeral 1 denotes a multi-layer cylindrical tubular rod in which fragments suitable for making a substantially cylindrical smoking article are obtained.

The rod 1 and a piece of this rod (not shown) comprise a first layer 2 of a first material. The first layer 2 is spliced in the longitudinal direction of each lateral edge 4 of the first layer 2 to form a first joint 3.

The rod 1 and a fragment of this rod, not shown, comprise a second layer 5 of a second material. The second layer 5 is continuous in the longitudinal direction to form a second joint 6 of each lateral edge 7 of the second layer 5.

In both the rod 1 and the piece, the first layer 2 occupies an inner position in the radial direction relative to the second layer 5.

The second layer 5 is continuous along the main extension direction X of the rod 1, coinciding with the feed direction of the rod during the production of the fragments.

At least one of the first joint 3 and the second joint 6 is made as an end-to-end joint. That is, the joint is made such that the two respective lateral edges are not overlapped.

The first material and the second material are different. For example, the first material may be a metallic material and the second material may be a paper material.

1A and 1C show a rod 1, wherein the first layer 2 is also continuous along the main extension direction X of the rod 1. The first joint portion 3 and the second joint portion 6 are both end-to-end joints, and are offset from each other. That is, these joints are disposed at different angular positions around the "X" direction. 1B shows the step of producing the rod 1 from a continuous multi-layer web M comprising a first layer 2 and a second layer 5 laid flat. Also shown is an intermediate layer 8 of an adhesive material interposed between the first layer 2 and the second layer 5.

Figures 2a and 2c show a rod 1 comprising a third layer 9 occupying a radially outward position relative to the first layer 2 and the second layer 5. The third layer 9 extends in the longitudinal direction to form the third joint 10 of each lateral edge 4 of the third layer 9. The first joint 3 and the second joint 6 are both end-to-end joints, and are preferably disposed at the same angular position around the X-direction. The third joint 10 is endless, offset relative to the first and second joints. That is, at different angular positions around the X direction.

2A and 2C, the first layer 2 is discontinuous and comprises a sequence of strips 14 alternating with the void space 15 along the feed direction . In this case, full closure of the rod 1 is ensured by the third layer 9, and the third joint 10 is offset from the other joints.

Figure 2b shows the step of producing the rod 1 from a continuous multi-layer web M comprising a first layer 2, a second layer 5 and a third layer 9 laid flat. An intermediate layer 8 of an adhesive material sandwiched between the first layer 2 and the second layer 5 and an additional intermediate layer 8 sandwiched between the second layer 5 and the third layer 9, Layer 12 is shown. The third layer is offset along the direction perpendicular to the X direction with respect to the first and second layers so that each third joint 10 has a first and a second joints 3, Offset.

As described below, the second layer 5 and the third layer 9 have the same thickness, and are preferably obtained by dividing a single continuous web lengthwise.

Figures 3a and 3c show a rod 1 comprising a third layer 9 occupying a radially outward position relative to the first layer 2 and the second layer 5. The third layer 9 extends in the longitudinal direction to form the third joint 10 of each lateral edge 4 of the third layer 9. Unlike the rods of Figs. 2A and 2C, the second layer 5 and the third layer 9 are different in thickness. In particular, the thickness of the second layer 5 is thinner than the thickness of the third layer 9. In this case, the function of the second layer 5 is to transport the first layer 2. By virtue of the reduced thickness, it is easier to wrap the second layer itself and can be made to absorb the adhesive material of the intermediate layer 8 better. The third layer 9 serves primarily as a support layer and provides the stiffness necessary to maintain the shape of the rod 1 and associated pieces.

3A and 3C, the first layer 2 is discontinuous and comprises a sequence of strips 14 alternating with void spaces 15 along the feed direction. In this case, the third layer 9 guarantees full closure of the rod 1, and the third joint 10 is offset from the other joints. Figure 3b is similar to Figure 2b.

Figures 4A and 4C show a rod 1 comprising a third layer 9 occupying a radially outward position relative to the first layer 2 and the second layer 5. The third layer 9 extends in the longitudinal direction to form the third joint 10 of each lateral edge 4 of the third layer 9. Unlike the rods of Figs. 2A and 2C, the second layer 5 and the third layer 9 have different thicknesses. In particular, the second layer 5 is thicker than the third layer 9. In this case, the second layer 5 acts as a layer for transporting the first layer 2 and as a supporting layer which provides the stiffness necessary to maintain the shape of the rod 1 and the associated segments. The function of the third layer 9 is mainly to improve the aesthetic appearance and to help the second layer 5 to remain closed.

Referring again to Figs. 4A and 4C, the first layer 2 is discontinuous and comprises a sequence of strips 14 alternating with void spaces 15 along the feed direction. In this case, a complete closure of the rod 1 is ensured by the third layer 9, and the third joint is offset from the other joints. Figure 4b is similar to Figure 2b.

Figures 5A and 5C show a rod 1 comprising a third layer 9 occupying a radially outward position relative to the first and second layers. The third layer 9 extends in the longitudinal direction to form the third joint 10 of each lateral edge 4 of the third layer 9. Unlike the rods of FIGS. 2A and 2C, the third joint 10 is offset from the overlap joint, preferably from the first joint 3 or the second joint 6. That is, the third joint portion 10 is disposed at an angular position different from the first joint portion 3 or the second joint portion 6 in the X direction.

5A and 5C, the first layer 2 is discontinuous and comprises a sequence of strips 14 alternating with void space 15 in the feed direction. In this case, full closure of the rod 1 is ensured by the third layer 9 and the third joint 10, and the third joint 10 is offset from the other joints and is an overlap joint.

Figure 5b shows the step of producing a rod 1 from a continuous multi-layer web M comprising flattened first layer 2, second layer 5 and third layer 9 . An intermediate layer 8 of an adhesive material sandwiched between the first layer 2 and the second layer 5 and an intermediate layer 8 interposed between the second layer 5 and the third layer 9, The adhesive layer 12 is shown. The third layer 9 is aligned in at least one of the lateral edges of the first layer 2 and the second layer 5.

Figures 6A and 6C show a rod 1 comprising a third layer 9 occupying a radially outward position relative to the first and second layers. The third layer 9 extends in the longitudinal direction to form the third joint 10 of each lateral edge 4 of the third layer 9. 2A and 2C, the first joint 3 is an overlap joint, the second layer 6 is an end joint, and the third joint 10 is an overlap joint, And is preferably offset from the first joint 3 or the second joint 6. The second layer 5 and the third layer 9 have different thicknesses. In particular, the second layer 5 is thicker than the third layer 9.

6A and 6C, the first layer 2 is discontinuous and comprises a sequence of strips 14 alternating with void spaces 15 along the feed direction. In this case, complete closure of the rod 1 is ensured by the third joint 9 and the third joint 10 offset from the other joint. The continuity of the second layer 2 along the circumferential direction is ensured by the first joint 3, which is an overlap joint.

Figure 6b shows a continuous multi-layer web (M) comprising a first layer (2) and a second layer (5) which are flattened and form an intermediate rod (13) To produce the rod (1). Also shown is an intermediate layer 8 of an adhesive material sandwiched between the first layer 1 and the second layer 5. Figure 6d shows an additional step of producing the rod 1 from the intermediate rod 13 and the third layer 9. The third layer 9 will be wrapped around the intermediate rod 13 to form the rod 1. Also shown is an additional intermediate adhesive layer 12 sandwiched between the second layer 5 and the third layer 9.

In all of the examples shown and / or described above, the first material may comprise one or more of a metallic material, a plastic material, and a paper material.

Figures 7 and 8 show two possible embodiments of a machine 100 for making a piece of a multi-layer cylindrical tubular rod 1 suitable for making a substantially cylindrical smoking article. More specifically, the machine 100 is suitable for making a piece of the rod 1 according to one or more of the illustrated and / or illustrated examples.

The machine 100 comprises at least a first means 101 for feeding a first continuous web 102 of a first material suitable for making a continuous multi-layer web M and a first layer 2 of rods 1, ).

The machine 100 comprises a second means 103 for feeding a second continuous web 104 of a second material suitable for making a continuous multi-layer web M and a second continuous layer 5 of the rod 1, .

The first continuous web 102 and / or the second continuous web 104 are preferably provided with a roll B unwound by respective means 102, 103 feeding a continuous web.

A gluing device 105 configured to apply a layer of adhesive material to the second continuous web 104 to form an intermediate layer 8 of an adhesive material of the rod 1 is provided on the second Is positioned along the feed path of the continuous web 104. The intermediate layer 8 is preferably continuous. The bonding apparatus 105 may be implemented by, for example, a roller, a sprayer, or other means.

A cutting device 106 configured to cut the first continuous web 102 into strips 14 may be positioned along the feed path of the first continuous web 102. The cutting device 106 is provided when the first layer 2 is discontinuous, that is, when the first layer includes a sequence of strips 14 alternating with the void space 15. The cutting device 106 may be a collision type or scissors type cutter, or may be implemented in other ways.

Reference numeral 107 denotes a means for forming a continuous multi-layer web M by superposing at least the first layer 2 and the second layer 5. These means may comprise, for example, a bed 107a, which forms a second continuous web 104 forming a second layer 5 and a first discontinuous layer 2 (Alternatively, the conveyor is configured by a first continuous web 102 forming the first continuous layer 2), and a conveyor 108 adapted to receive the strip 14 of the first continuous web 102 ). The conveyor 108 is also suitable for feeding a continuous multi-layer web M along the feed direction X and thus implements means for feeding a continuous multi-layer web M along the feed direction X .

Preferably, the conveyor 108 is configured such that the intermediate layer 8 is applied thereon, on which the strip 14 of the first continuous web 102 is positioned by the drum 109 associated with the cutting device 106 And receives a second continuous web 104 that is placed thereon.

Thus, downstream of the drum 109, a continuous multi-layer web M is obtained in which the first layer 2 occupies the radially inward position in the rod 1 relative to the second layer 5.

Downstream of the conveyor 108 there is provided means 110 for forming the rod 1 around the feed direction X making the joints of the layers making up the rod 1 itself .

The means 110 includes a forming beam 110a having a groove with variable cross-section along the feeding direction X to form a continuous multi-layer web M around the feeding direction X It is possible to form the rod 1 by lapping.

Downstream of the means 110 for forming the rod 1 is means 111 for cutting the rod 1 into pieces.

Advantageously, the machine 100 comprises a first layer 2 and a second layer 5 such that at least one of the first and second joints 3 and 6 is made as an endless joint, At least one lateral edge of at least one of the first and second edges.

A third means 112 for feeding a third continuous web 113 of a third material suitable for making the third layer 9 of the rod 1, as shown in Figures 7 and 8, do. The third continuous web 113 and thus the third layer 9 are arranged so as to occupy a radially outward position in the rod 1 relative to the first layer 2 and the second layer 5.

There is an adhesive apparatus 105a along the feed path of the third continuous web 13 configured to apply an additional intermediate adhesive layer 12 sandwiched between the second layer 5 and the third layer 9. [ The bonding apparatus 105 may be implemented, for example, by a roller, a sprayer or other means.

In the example shown in Fig. 7, the third means 112 feeds a third web 113 downstream of the conveyor 108 and upstream of the means 110 to form a third layer 9. Thus, the first layer 2, the second layer 5 and the third layer 9 form a continuous multi-layer web M, which wraps itself along the forming beam 110a.

If desired, the machine 100 may include blades 114 configured to trim the edges of a continuous multi-layer web with two blades 114 positioned on both sides of a continuous multi-layer web M . In the case of FIG. 7, the blades 114 are circular blades, and at least one active portion of the conveyor 108 uses a flat surface 115 on which it rests as a backing element. The blades are located downstream of the drum 109 to trim the continuous multi-layer web M comprising the first layer 2 and the second layer 5. [

If desired, the machine 100 may further comprise a molding device 116 configured to preform the continuous multi-layer web M before the continuous multi-layer web M is wrapped by itself to form the rod 1, . ≪ / RTI > Figures 11 and 12 show a molding device 116 that can be used in any machine that forms the rod 1 and includes a mold cavity 117 suitable for receiving a continuous multi-layer web M, For example a wheel 118, which at least partly fits into the grooved shape of the continuous multi-layer web M in the feed direction X and extends along its center. And shows a possible example of the molding device 116. [ The molding device 116 may act on a continuous multi-layer web M comprising only the first layer 2 and the second layer 5 or may be applied to the first layer 2, , A second layer (5) and a third layer (9).

The machine 100 shown in Fig. 8 differs from the machine shown in Fig. 7 in that it includes two forming beams. The first shaping beam 110a is similar to that shown in Figure 7, which is configured to make the rod 1. An additional forming beam 119 is placed on the conveyor 108 to form the intermediate rod 13 by wrapping the continuous multi-layer web M itself including the first layer 2 and the second layer 5. [ do. A third continuous web 113 is fed between the additional forming beam 119 and the forming beam 110a to form the rod 1 by wrapping the third continuous web 113 around the intermediate rod 13. [ do.

The machine 100 is suitable for use in accordance with the method of making the fragments of a multi-layer cylindrical tubular rod suitable for making a substantially cylindrical smoking article in use.

The method described above includes step a) of supplying at least a first continuous web 102 of a first material suitable for producing a first layer 2 of continuous multi-layer webs M. [ This step is performed, for example, by the first feeding means 101. [

The method described above comprises step b) of supplying a second continuous web 104 of a second material suitable for producing a second continuous layer 5 of continuous multi-layer web (M). This step is carried out, for example, by the second feeding means 103. [

Preferably there is step f) of supplying a third continuous web 113 of a third material suitable for producing the third layer 9 of the rod 1. The third layer 9 is arranged in the rod 1 so as to occupy an outer radial position relative to the first layer 2 and the second layer 5. [

The above-described method is characterized in that at least a first layer 2 and a second layer 5 are superimposed such that the first layer 2 occupies an inner position radially relative to the second layer 5 in the rod 1 And forming a continuous multi-layer web (M) by superimposing the continuous multi-layer web (M) in the feed direction (X). This step is carried out, for example, in the means 107 and in the conveyor 108.

The above-described method is advantageous in that the continuous multi-layer web M is wrapped around the feed direction X so that at least the first joint 3 and the second layer 5 of the lateral edges of the first layer 2, (D) of forming a second joint (6) of the lateral edges of the rod (1) to form the rod (1). This step is performed on the forming beam 110a to form a continuous multi-layer web M comprising a first layer 2, a second layer 5 and possibly a third layer 9, Or a forming beam 119 to form a continuous multi-layer web M comprising a first layer 2 and a second layer 5. In the latter case, if necessary, the formation of the rod 1 can be completed by wrapping the third layer 9 around the intermediate rod 13.

The method described above includes step e) of cutting the rod 1 into fragments.

Steps a) to e) are carried out in a single machine 100 to produce a multi-layer cylindrical tubular rod 1. The step d) further comprises the step of forming at least one of the first layer 2 and the second layer 5 so that at least one of the first and second joints 3 and 6 is made as an end- By arranging the lateral edges of the < / RTI >

Preferably, the strips 14 of the first continuous web 102 are produced to produce a first discontinuous layer 2 along the feed direction X, wherein the first layer 2 is in the feed direction X to include a sequence of strips 14 alternating with void spaces 15, as shown in FIG. This step is performed, for example, by the cutting device 106.

Supplying a single continuous web suitable for making the second layer 5 and the third layer 9 as required and a second continuous web 104 and a third continuous web 113, With two consecutive sections defining, there may be a step of longitudinally dividing the single continuous web. In this case, the second continuous web 104 and the third continuous web 113 have the same thickness. Alternatively, the second continuous web 104 and the third continuous web 113 have different thicknesses.

7, step c) comprises forming a continuous multi-layer web M by first superimposing the first layer 2 and the second layer 5, then adding the third layer 9 . The successive multi-layer webs thus obtained, namely the continuous multi-layer webs comprising the first layer 2, the second layer 5 and the third layer 9, So as to form the rod 1.

In one possible embodiment, step d) is arranged to place the lateral edges of the first layer 2 to make the first end miter part 3 and to form the second end miter part 6 By arranging the lateral edges of the second layer (5).

In this case, step c) may comprise offsetting the third layer 9 with respect to at least one of the first and second layers along a direction perpendicular to the feed direction X, and step d) The third stage (Figs. 2A-4A) can be performed by positioning the lateral edges of the third layer so that the joint 10 is created. Alternatively, step d) can be performed by disposing the lateral edges of the third layer 9 such that the third joint is a superimposed joint (Fig. 5A).

As shown in Fig. 8, step c) includes forming a continuous multi-layer web M by superimposing the first layer 2 and the second layer 5. The continuous multi-layer web M is then wrapped itself to form the intermediate rod 13 and juxtaposed with the third continuous web 113, i.e. the third layer 9, A third continuous web 113 is wrapped to form the rod 1. In other words, there is step g) of wrapping the third layer 9 around the intermediate rod 13 that has already been formed by wrapping the first and second layers around themselves. Advantageously, step d) comprises positioning the lateral edges 4 of the first layer 2 such that at least the first overlapping joint 3 is made and the second end folding part 6 is made By arranging the lateral edges 7 of the second layer 5 so that the second layer 5 has the same thickness as the second layer 5. Preferably, step g) is performed by disposing the lateral edges 11 of the third layer 9 such that a third overlying joint 10 (Fig. 6A) is made.

If desired, the edges of the continuous multi-layer web M can be trimmed before the web itself is wrapped to form a multi-layer cylindrical tubular rod. More specifically, in one embodiment with the third layer 9, the edges of the continuous multi-layer web M formed by the first layer 2 and the second layer 5 may be trimmed.

If desired, it may be carried out to create a groove shape extending in the feed direction X on the continuous multi-layer web before the continuous multi-layer web M itself is wrapped to form the rod 1 .

In an alternate embodiment, not shown, the machine 100 may be used to manufacture a rod 1 that includes only a first layer 2 and a second layer 5 having first and second end- Suitable. In this case, the first layer 2 is continuous along the feed direction X and the first layer 2 and the second layer 5 are offset in a direction perpendicular to the feed direction X.

Independently of the foregoing, the method according to the invention may also comprise a second layer (2) and a third layer (9) having the same or different thicknesses. Providing a single continuous web suitable for making the second and third layers in the case of the former and a second continuous web 104 and a third continuous web 113 respectively There may be steps in the longitudinal direction that divide the web into two continuous web portions.

Claims (18)

1. A method of manufacturing fragments of a multi-layered cylindrical tubular rod (1) suitable for producing smoking articles which are substantially cylindrical,
a) providing a first continuous web 102 of a first material suitable for making at least a first layer (2) of a continuous multi-layer web (M);
b) supplying a second continuous web 104 of a second material suitable for making the second continuous layer 5 of the continuous multi-layer web M;
c) superimposing at least the first layer 2 and the second layer 5 such that the first layer 2 in the rod 1 is positioned in the radial direction relative to the second layer 5 Forming a continuous multi-layer web (M) by setting and overlapping and feeding the continuous multi-layer web (M) along a feed direction (X);
d) wrapping a continuous multi-layer web (M) around the feed direction (X) so that at least the first joint (3) and the second layer (3) of the lateral edges (4) of the first layer 5) of the lateral edges (7) to obtain a first joint (6) to obtain a rod (1);
e) cutting the rod (1) into pieces, the method comprising the steps of:
Wherein steps a) to e) are carried out in a single machine (100) for producing a multi-layer cylindrical tubular rod (1), and step d) is carried out on at least one of the first and second joints (4, 7) of at least one of the first layer (2) and the second layer (5) so that the first layer (2) and the second layer (5) are made to be end-to-end joints. Method of manufacturing multilayer cylindrical tubular rod segments. The method according to claim 1,
The method comprises a step f) of supplying a third continuous web 113 of a third material suitable for producing the third layer 9 of the rod 1 and the third layer 9 comprises a step Wherein the first layer (2) and the second layer (5) are positioned to occupy radially outward positions relative to the first layer (2) and the second layer (5). 3. The method of claim 2,
Step c) comprises forming a continuous multi-layer web M by overlapping the first layer 2, the second layer 5 and the third layer 9,
It is preferable to position the lateral edges 4 of the first layer 2 to make the first end overt joint 3 and to place the second edge 5 of the second layer 5 (D) is completed by positioning the lateral edges (7) of the cylindrical tubular rod segments. The method of claim 3,
Step c) includes offsetting the third layer 9 along at least one of the first layer 2 and the second layer 5 along a direction perpendicular to the feed direction X,
Step d) is completed by placing the lateral edges 11 of the third layer 9 so that the third end overhang 10 is made or step d) is completed by making the third overhang 10 Of the third layer (9), so that the lateral edges (11) of the third layer (9) are positioned. 3. The method of claim 2,
The continuous multi-layer web M formed by superimposing the first layer 2 and the second layer 5 is ramped to form an intermediate rod 13 that is juxtaposed with the third layer 9,
The method comprises the steps of laminating a third layer 9 around a first layer 2 and a second layer 5 that have already been wrapped to form an intermediate rod 13 so that the third layer 9 is laterally (G) making the third joint (10) of the edges (11)
Preferably the lateral edges 4 of the first layer 2 are positioned such that at least a first overlapping joint 3 is created and the second end joints 6 are formed such that a second end joint 6 is created, Step d) is completed by placing the lateral edges 7 of the first,
Characterized in that step g) is completed by positioning the lateral edges (11) of the third layer (9) so that a third overlapping joint (10) Way. In at least one of the preceding claims,
Layered web (M), characterized in that it comprises the step of trimming the edges of said continuous multi-layer web (M) before laminating a continuous multi-layer web (M) to form a multi-layer cylindrical tubular rod Fragments. In at least one of the preceding claims,
Prior to forming the multi-layer cylindrical tubular rod 1 by wrapping the continuous multi-layer web M, the continuous multi-layer web M is preformed to form the continuous multi-layer web M in the feed direction X, And forming a central shape extending along a center of the cylindrical tubular rod segments. In at least one of the preceding claims,
The method includes making strips (14) of a first continuous web (102) to form a first discontinuous layer (2) along a feed direction (X), the first discontinuous layer (2) Characterized in that it comprises a sequence of strips (14) alternating with an empty space (15) along the length of the strip (14). 8. The method according to any one of claims 1 to 7,
The method comprises the steps of making a first continuous layer (2) along a feed direction (X)
Preferably step c) comprises offsetting the first layer 2 and the second layer 5 in a direction perpendicular to the feed direction X,
Step d) is completed by positioning the lateral edges 4 of the first layer 2 and the lateral edges 7 of the second layer 5 end to end Of the cylindrical tubular rod segments. A machine (100) for producing fragments of a multi-layer cylindrical tubular rod suitable for producing a substantially cylindrical smoking article,
The machine comprises:
First means (101) for feeding at least a first continuous web (102) of a first material suitable for making a first layer (2) of continuous multi-layer webs (M);
Second means (103) for feeding a second continuous web (104) of a second material suitable for making a second continuous layer (5) of successive multi-layer webs (M);
Superimposing at least the first layer 2 and the second layer 5 such that the first layer 2 is positioned at the radially inner position in the rod 1 relative to the second layer 5, Means (107) for forming a continuous multi-layer web (M) and means (108) for feeding a continuous multi-layer web (M) along the feed direction (X);
Means (110) for making joints (3, 6, 10) of the layers making up the load itself and forming a rod (1) around the feed direction (X);
And means (111) for cutting the rod (1) into pieces,
The machine 100 is characterized in that at least one of the first layer 2 and the second layer 5 is formed so that at least one of the first and second joints 3 and 6 is made as an endless joint. Is configured to position the lateral edges (4, 7) of the cylindrical tubular rod segments (3, 4). 11. The method of claim 10,
The machine 100 comprises a third means 112 for feeding a third continuous web 113 of a third material suitable for making the third layer 9 of the rod 1, Characterized in that the first layer (9) is positioned at the rod (1) to occupy a radially outward position relative to the first layer (2) and the second layer (5) . 12. The method of claim 11,
The means 110 for forming the rod 1 around the feed direction X wrap the continuous multi-layer web M comprising the first layer 2 and the second layer 5, (119), which is configured to form an upper shaping beam (13)
Characterized in that the machine comprises a downstream forming beam (110a) configured to wrap a third continuous web (113) around the intermediate rod (13) to form the rod (1) Machines for manufacturing fragments. 13. The method according to any one of claims 10 to 12,
Layered web (M), characterized in that it comprises two blades (114) located on both sides of a continuous multi-layer web (M) and configured to trim the edges of the continuous multi- Machine. 14. The method according to one of claims 10 to 13,
(M), characterized in that it comprises a molding device (116) configured to preform a continuous multi-layer web (M) before the continuous multi-layer web (M) Machines for manufacturing cylindrical tubular rod segments. As a fragment of a multi-layer cylindrical tubular rod (1) suitable for making a substantially cylindrical smoking article,
The piece has a first layer 2 of a first material comprising a first joint 3 of each lateral edge 4 and a second joint 2 of a respective lateral edge 7, , Wherein the first layer (2) comprises a plurality of layers of cylindrical tubular rods (3), which occupy an inner radial position relative to the second layer (5) In this case,
Wherein at least one of the first joint (3) and the second joint (6) is made as an end-to-end joint. 16. The method of claim 15,
The piece comprises a third joint 10 of each lateral edge 11 occupying a radially outward position relative to the first layer 2 and the second layer 5, And a third continuous layer (9)
Preferably, the first joint 3 is an overlap joint, the second joint 6 is an end joint, and the third joint 10 is preferably a joint between the first joint 3 and the first joint 3, Is a superimposed joint which is offset relative to the second joint (6). 17. The method of claim 16,
Wherein the thickness of the second layer (5) and the thickness of the third layer (9) are different. 18. The method according to any one of claims 15 to 17,
The first layer 2 is continuous along the feed direction X and the first and second joints 3 and 6 are made endless and offset from each other,
Characterized in that the first layer (2) is discontinuous and comprises a sequence of strips (14) alternating with the void spaces (15) along the feed direction (X).

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