EP3628604B1 - Coupling method and unit to couple an insert and a wrapping sheet to a group of smoking articles in a packaging machine - Google Patents
Coupling method and unit to couple an insert and a wrapping sheet to a group of smoking articles in a packaging machine Download PDFInfo
- Publication number
- EP3628604B1 EP3628604B1 EP19020543.5A EP19020543A EP3628604B1 EP 3628604 B1 EP3628604 B1 EP 3628604B1 EP 19020543 A EP19020543 A EP 19020543A EP 3628604 B1 EP3628604 B1 EP 3628604B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spindle
- insert
- group
- coupling method
- feeding station
- 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.)
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Links
- 238000010168 coupling process Methods 0.000 title claims description 62
- 230000000391 smoking effect Effects 0.000 title claims description 22
- 238000004806 packaging method and process Methods 0.000 title claims description 18
- 230000008878 coupling Effects 0.000 claims description 39
- 238000005859 coupling reaction Methods 0.000 claims description 39
- 238000000605 extraction Methods 0.000 claims description 24
- 235000019504 cigarettes Nutrition 0.000 description 106
- 230000003014 reinforcing effect Effects 0.000 description 76
- 238000000034 method Methods 0.000 description 7
- 239000003292 glue Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000011087 paperboard Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 235000019506 cigar Nutrition 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000003571 electronic cigarette Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B19/00—Packaging rod-shaped or tubular articles susceptible to damage by abrasion or pressure, e.g. cigarettes, cigars, macaroni, spaghetti, drinking straws or welding electrodes
- B65B19/02—Packaging cigarettes
- B65B19/22—Wrapping the cigarettes; Packaging the cigarettes in containers formed by folding wrapping material around formers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B19/00—Packaging rod-shaped or tubular articles susceptible to damage by abrasion or pressure, e.g. cigarettes, cigars, macaroni, spaghetti, drinking straws or welding electrodes
- B65B19/02—Packaging cigarettes
- B65B19/22—Wrapping the cigarettes; Packaging the cigarettes in containers formed by folding wrapping material around formers
- B65B19/24—Wrapping the cigarettes; Packaging the cigarettes in containers formed by folding wrapping material around formers using hollow mandrels through which groups of cigarettes are fed
Definitions
- the present invention relates to a coupling method and to a unit to couple an insert and a wrapping sheet to a group of smoking articles in a packaging machine.
- the present invention finds advantageous application in a cigarette packaging machine to which the present description explicitly refers without thereby losing generality.
- a packaging machine for smoking articles is known from e.g. WO 2016/166141 . It relates to a coupling method and a unit to couple an insert and a wrapping sheet to a group of smoking articles in that packaging machine.
- a packet of cigarettes generally comprises an inner wrap, which is formed by a group of cigarettes wrapped in an inner wrapping sheet, and an outer casing, which encloses the inner wrap and can be formed by an outer wrapping sheet folded around the inner wrap and cup-shaped (soft type packet of cigarettes), or it can be formed by a rigid box with a hinged lid obtained by folding a rigid blank around the inner wrap (rigid type packet of cigarettes).
- an insert can also be provided, arranged inside the inner wrap (typically a protective element or a collar) or arranged between the inner wrap and the outer wrap (typically a collar and/or a coupon).
- the feeding of an insert is complex in that the insert must be arranged and kept in a precise position in contact with the group of cigarettes (above or below the inner wrapping sheet) without being glued to the group of cigarettes; only the subsequent folding of the outer wrap (insert arranged between the inner wrap and the outer wrap) or of the inner wrapping sheet (insert arranged inside the inner wrap) around the group of cigarettes stabilizes the position of the insert .
- the feeding of an insert is particularly complex when the insert must be inserted inside the inner wrap, that is, in direct contact with the group of cigarettes, since the group of cigarettes does not provide a uniform supporting surface and does not have a stable shape.
- Patent application EP2008935A1 describes a wrapping method to couple an insert to a group of cigarettes.
- the group of cigarettes is fed to a first seat of a pocket (the first seat is shaped to contain only the group of cigarettes) while the insert is fed to a second seat of the pocket (the second seat is shaped to contain only the insert and is separated and arranged next to the first seat); subsequently, the group of cigarettes and the insert are extracted together from the pocket (i.e. from the respective seats of the pocket) by means of a single common extracting device so as to couple the insert to the group of cigarettes.
- the wrapping method described in the patent application EP2008935A1 does not allow to operate at a very high speed (expressed as the number of packets of cigarettes made in the time unit) while ensuring perfect folding (i.e. with precise and squared folding angles) of the insert around the group of cigarettes.
- the object of the present invention is to provide a coupling method and unit to couple an insert and a wrapping sheet to a group of smoking articles in a packaging machine, the which coupling method and unit are easy and inexpensive to manufacture and allow an effective and efficient feeding of an insert and of a wrapping sheet to a group of smoking articles even when operating at very high speed.
- a method and a coupling unit are provided to couple an insert and a wrapping sheet to a group of smoking articles in a packaging machine, according to what is set forth in the attached claims.
- the packet 1 of cigarettes comprises a cup-shaped outer container 2 made of cardboard or rigid paperboard and a sealed wrap 3 (better illustrated in Figure 8 ) housed inside the container 2.
- the outer container 2 has an open upper end and is provided with a lid 4, which is cup-shaped and is hinged to the outer container 2 along a hinge 5 (illustrated in Figure 2 ) so as to rotate, with respect to the outer container 2, between an open position (illustrated in Figure 3 ) and a closed position (illustrated in Figures 1 and 2 ) of the open upper end.
- the outer container 2 has a substantially rectangular parallelepiped shape oriented in a prevalent vertical development direction, is cup-shaped, and has the upper end open, a lower wall 6 opposite the upper open end, a front wall 7 and a rear wall 8 (in which the hinge 5 is formed) parallel and opposite to one another, and two side walls 9 parallel and opposite to one another.
- the lid 4 has a substantially rectangular parallelepiped shape, is cup-shaped, and has an open lower end (facing the open upper end of the outer container 2 when the lid 4 is in the closed position), an upper wall 10 (which is parallel and opposite to the lower wall 6 of the outer container 2 when the lid 4 is in the closed position), a front wall 11 (which is parallel and aligned with the front wall 7 of the outer container 2 when the lid 4 is in the closed position), a rear wall 12 (which is parallel and aligned with the rear wall 8 of the outer container 2 when the lid 4 is in the closed position and is hinged to the rear wall 8 of the outer container 2 along the hinge 5), and two side walls 13 parallel and opposite to one another (which are parallel and aligned with, in particular coplanar and adjacent, to the side walls 9 of the outer container 2 when the lid 4 is in the closed position).
- the wrap 3 encloses a group 14 of cigarettes (partially illustrated in Figure 3 and fully illustrated in Figure 5 ) having a parallelepiped shape; moreover, the wrap 3 has an extraction opening 15 for the cigarettes, at the top and in front, closed by a reusable closing label 16.
- the closing label 16 is fixed to the wrap 3 by means of non-dry re-stick glue 17, which is applied to the inner surface of the closing label 16 (i.e. the surface of the closing label 16 facing the wrap 3) and is arranged around the extraction opening 15 so as to allow the closing label 16 to be (i.e. at each opening of the packet 1 of cigarettes) partially separated from the wrap 3 several times, and then, fixed again to the wrap 3 (at each closing of the packet 1 of cigarettes).
- the closing label 16 is provided with a connecting tab 17, which is glued, permanently and in a non-separable manner, to the inner surface of the front wall 11 of the lid 4 by means of the permanent glue which is applied to the outer surface of the closing label 16 (i.e. the surface of the closing label 16 facing outwards, that is, from the opposite wall of the wrap 3). In this way, by opening or closing the lid 4, the closing label 16 is also simultaneously opened and closed.
- the inner wrap 3 comprises a reinforcing element 18 (illustrated in Figure 6 ), which is made of cardboard or rigid paperboard (totally similar to the cardboard or rigid paperboard forming the outer container 2), is "U"-shaped and it is arranged inside the inner wrap 3 in contact with the group 14 of cigarettes.
- the reinforcing element 18 comprises a rectangular-shaped front wall 19, which is arranged in contact with a front wall of the group 14 of cigarettes and a pair of side walls 20, which are connected to the opposite sides of the front wall 19 and are placed in contact with the side walls of the group 14 of cigarettes.
- the front wall 19 has a window which is arranged at the top, is delimited by an edge 21, is "U"-shaped, and facilitates the extraction of the cigarettes from the group 14 of cigarettes as it exposes an upper area of the front wall of the group 14 of cigarettes.
- the function of the reinforcing element 18 is to provide greater rigidness and greater shape stability to the sealed wrap 3 so as to prevent the sealed wrap 3 from collapsing in on itself after having extracted some of the cigarettes contained in the sealed wrap 3, thus making the extraction of the remaining cigarettes complicated and in particular making the opening and the subsequent closing of the closing label 17 extremely complicated.
- a further function of the reinforcing element 18 is to provide an adequate mechanical protection for the cigarettes during the forming and handling of the sealed wrap 3.
- Another function of the reinforcing element 18 is to keep the lid 4 in the closed position, since in order for the lid 4 to pass from the closed position to the open position (and vice versa) it must slightly elastically deform the upper and front part of the reinforcing element 18.
- the wrap 3 is obtained by folding a heat-sealable wrapping sheet 22, which has a rectangular shape, is folded around the group 14 of cigarettes and, once folded, is stabilized by heat-sealing (i.e. overlapping portions of the wrapping sheet 22 are connected to one another in a stable manner by heat-sealing).
- the wrapping sheet 22 has an incision 23 which is "U"-shaped and defines the extraction opening 15 of the wrap 3; moreover, the closing label 16 is completely glued to the wrapping sheet 22 which completely covers the incision 23 (i.e. the extraction opening 15).
- the pressure-sensitive re-stick glue i.e. which does not dry
- the pressure-sensitive re-stick glue is interposed, which also allows, even after long time has passed and for a high number of times, to separate the closing label 16 from the wrapping sheet 22 and then to re-join the closing label 16 to the wrapping sheet 22.
- number 24 denotes, as a whole, a packaging machine which makes the packet 1 of cigarettes described above.
- the packaging machine 24 comprises a forming unit 25 (of a known type and schematically illustrated in Figure 8 ) in which the groups 14 of cigarettes are formed in succession, a coupling unit 26 in which, to each group 14 of cigarettes, a corresponding reinforcing element 18 is coupled, which is folded in a "U"-shape around the group 14 of cigarettes, a wrapping unit 27 (of a known type and only partially illustrated in Figure 8 ) in which around each group 14 of cigarettes a respective wrapping sheet 22 is wrapped and heat-sealed for making a corresponding inner wrap 3, and a wrapping unit 28 (of a known type and schematically illustrated in Figure 8 ) in which a blank is folded around each inner wrap 3 so as to form an outer container 2 and a lid 4 to complete the making of a packet 1 of cigarettes. It is important to underline that the wrapping machine 24 could comprise only the forming unit 25, the coupling unit 26 and the wrapping unit 27 (in this case each inner wrap 3 is a marketable finished product).
- the coupling unit 26 comprises a coupling wheel 29 which is mounted rotatable around a horizontal rotation axis 30 and supports four pairs of spindles 31 (only one of which is illustrated in Figure 8 for clarity).
- the coupling wheel 29 could be replaced by a different type of conveyor, for example by a closed loop conveyor belt.
- Each spindle 31 is tubular, has a parallelepiped shape, and is internally hollow to receive a group 14 of cigarettes on the inside thereof; in particular, the group 14 of cigarettes axially enters through an end of the spindle 31 and axially exits from the opposite end.
- the coupling wheel 29 rotates with intermittent motion (i.e. cyclically alternating moving steps and stopping steps) to cyclically move each pair of spindles 31 along a circular coupling path which crosses: a feeding station S1 in which a group 14 of cigarettes is fed inside each spindle 31 of a pair of spindles 31, a subsequent feeding station S2 in which an insert 18 is laid on an outer surface of each spindle 31 of a pair of spindles 31 (therefore on the opposite side of the group 14 of cigarettes which is arranged inside the spindle 31), and finally an extraction station S3 in which from each spindle 31 of a pair of spindles 31 the group 14 of cigarettes and the reinforcing insert 18 are extracted together by means of a single common extracting device 32 so as to lay the reinforcing element 18 on the group 14 of cigarettes.
- intermittent motion i.e. cyclically alternating moving steps and stopping steps
- each reinforcing element 18 is separated from the corresponding group 14 of cigarettes, and therefore does not touch the corresponding group 14 of cigarettes, as between the reinforcing element 18 and the corresponding group 14 of cigarettes a spindle 31 is interposed.
- each reinforcing element 18 is laid on the outer surface of a spindle 31 whereas the corresponding group 14 of cigarettes is arranged inside the spindle 31.
- the coupling unit 26 operates on a double line, i.e. two parallel and coupled spindles 31 (a pair of spindles 31) simultaneously receive two corresponding inserts 18 in the feeding station S1, simultaneously receive two corresponding groups 14 of cigarettes in the feeding station S2, and simultaneously release the two groups 14 of cigarettes together with the inserts 18 in the extraction station S3.
- the coupling unit 26 operates in a single line, i.e. a single spindle 31 at a time receives a corresponding insert 18 in the feeding station S1, receives a corresponding group 14 of cigarettes in the feeding station S2, and releases the group 14 of cigarettes together with the insert 18 in the extraction station S3.
- each reinforcing element 18 is laid flat (i.e. without any type of folding) on the outer surface of the corresponding spindle 31 and is then folded in a "U"-shape around the spindle 31 after being laid flat on the spindle 31; in particular, each reinforcing element 18 is laid flat on the outer surface of the corresponding spindle 31 in the feeding station S1 and is folded in a "U"-shape around the spindle 31 in the feeding station S2 after inserting the group 14 of cigarettes inside the spindle 31.
- each reinforcing element 18 could be laid flat (i.e. without any type of folding) on the outer surface of the corresponding spindle 31 and then folded in a "U"-shape around the spindle 31 before the feeding station S2 (directly in the feeding station S1 or in transit from the feeding station S1 to the feeding station S2), in the feeding station S2 and during the feeding of the group 14 of cigarettes, or downstream of the feeding station S2 (i.e. between the feeding station S2 and the extraction station S3).
- each reinforcing element 18 could be placed already folded in a "U"-shape around the spindle 31 in the feeding station S1, i.e. each reinforcing element 18 could be folded in a "U"-shape against the spindle 31 in the feeding station S1 when laying the reinforcing element 18 against the outer surface of the spindle 31.
- the feeding station S1 in which the reinforcing elements 18 are laid on the outer surface of the corresponding spindles 31, is arranged upstream of the feeding station S2 in which the groups 14 of cigarettes are inserted inside the corresponding spindles 31; according to an alternative embodiment, not illustrated, the feeding station S1, in which the reinforcing elements 18 are laid on the outer surface of the corresponding spindles 31, is arranged downstream of the feeding station S2 in which the groups 14 of cigarettes are inserted inside the corresponding spindles 31.
- the extracting device 32 arranged in the extraction station S3, comprises two twin pushers 33, each of which is movable with reciprocating motion and is inserted inside a corresponding spindle 31 for axially pushing both the group 14 of cigarettes (which is arranged inside the spindle 31), and the corresponding reinforcing element 18 (which is folded in a "U"-shape and is laid on an outer surface of the spindle 31) away from the spindle 31.
- the wrapping unit 27 comprises two twin folding tunnels 34 and the pushers 33 of the extracting device 32 insert the two groups 14 of cigarettes, coupled to the corresponding reinforcing elements 18 into the two folding tunnels 34; immediately downstream of the entrance of the folding tunnels 34, the wrapping sheets 22 (not illustrated for clarity in Figure 8 ) are fed, which are intercepted by the two groups 14 of cigarettes entering the folding tunnels 34.
- the feeding station S2 comprises two twin pushers 35, each of which is movable with reciprocating motion and pushes a corresponding group 14 of cigarettes inside a spindle 31 standing still in the feeding station S2.
- the forming unit 25 cyclically arranges a pair of groups 14 of cigarettes in the feeding station S2 and in front of the pair of spindles 31 which is standing still in the feeding station S2; in this way, the two pushers 35 can push the two groups 14 of cigarettes into the corresponding spindles 31.
- two compressing bodies 36 are arranged immediately upstream of the pair of spindles 31 standing still in the feeding station S2, each of which is (internally) shaped like a funnel, is arranged in front of one end of the corresponding spindle 31 and elastically compresses the group 14 of cigarettes so as to reduce the size of the cross-section of the group 14 of cigarettes.
- each group 14 of cigarettes is passed through a corresponding compressing body 36 which elastically compresses the group 14 of cigarettes so as to reduce the size of the cross-section of the group 14 of cigarettes and thus facilitate the entry of the group 14 of cigarettes in the corresponding spindle 31 that is standing still.
- the compressing bodies 36 could be integrated into the spindles 31, each of which has the inlet end shaped like a funnel.
- a feeding device 37 is arranged in the feeding station S1, which cyclically feeds two reinforcing elements 18 to a pair of spindles 31 standing still in the feeding station S1.
- the feeding device 37 comprises a feeding conveyor 38 which receives the reinforcing elements 18 from the bottom of a hopper (not illustrated) containing a stack of flat reinforcing elements 18 and feeds the flat reinforcing elements 18 near the pair of spindles 31 standing still in the feeding station S1.
- the feeding conveyor 38 comprises a suction belt 39 wound in a loop around two end pulleys 40 (at least one of which is motorized); according to an alternative embodiment not illustrated, the feeding conveyor 38 comprises a wheel mounted in a rotary manner.
- the feeding device 37 comprises a transfer device 41 which is movable for withdrawing a pair of reinforcing elements 18 from the suction belt 39 of the feeding conveyor 38 and subsequently release the pair of reinforcing elements 18 to the corresponding two spindles 31 standing still in the feeding station S1.
- the transfer device 41 comprises two sucking holding heads 42, each of which is designed to grasp (by suction) a reinforcing element 18 from the feeding conveyor 38, is designed to hold the reinforcing element 18 during the movement from the feeding conveyor 38 to a corresponding spindle 31 and is designed to release the reinforcing element 18 at the spindle 31.
- each holding head 42 is shaped like a fork and has two tines 43, which engage opposite ends of the insert 18 and are arranged at a distance from one another that is greater than the corresponding cross size of the spindle 31; consequently, the two tines 43 of each holding head 42 embrace the corresponding spindle 31 from opposite sides and engage the two side walls 20 of the reinforcing element 18 (as clearly illustrated also in Figures 11 and 12 ) .
- each folding element 44 is coupled, which is "U"-shaped, is designed to embrace the spindle 31 to enable the "U"-folding of a reinforcing element 18 against the spindle 31, and is mounted in a movable manner on the coupling wheel 29 to move radially with respect to the spindle 31; in particular, each folding element 44 is movable radially (for example under the thrust of a cam actuated system which is set in motion by the rotation movement of the coupling wheel 29 around the rotation axis 30) between a receiving position (illustrated in Figures 10-14 ) in which the folding element 44 is relatively far away from the spindle 31 to allow a holding head 42 to feed a reinforcing element 18 to the spindle 31, and a folding position (illustrated in Figure 15 ) in which the folding element 44 is pressed against the spindle 31 thus embracing the spindle 31 and therefore enabling the "U"-
- a locking element 45 is coupled to each spindle 31, which is designed to lock a reinforcing element 18 against the spindle 31 and is mounted in a movable manner on the coupling wheel 29 to move radially with respect to the spindle 31 (independently of the corresponding folding element 44); in particular, each locking element 45 is radially movable (for example under the thrust of a cam actuated system which is set in motion by the rotation movement of the coupling wheel 29 around the rotation axis 30) between a receiving position (illustrated in Figures 10-12 ) in which the locking element 45 is relatively far away from the spindle 31 so as to allow a holding head 42 to feed a reinforcing element 18 to the spindle 31, and a locking position (illustrated in the Figures 13-15 ) in which the locking element 45 is pressed against the spindle 31 by clamping the reinforcing element 18 against the spindle 31.
- each folding element 44 is arranged beside the corresponding locking element 45 and has a shape complementary to the shape of the locking element so that both the folding element 44 and the locking element 45 can come into contact with the corresponding spindle 31 in a completely independent way.
- each folding element 44 is larger than the corresponding locking element 45 and has a through-opening, on the inside of which the locking element 45 is arranged.
- the radial movement of the folding element 44 is independent of the radial movement of the locking element 45 to allow the two elements 44 and 45 to move radially with differentiated laws of motion.
- each pair of folding elements 44 is rigidly mounted on a single common support bar 46, which is mounted radially movable on the coupling wheel 29
- each pair of locking elements 45 is rigidly mounted on a single common support bar 47, which is mounted radially movable on the coupling wheel 29 and is arranged beside the support bar 46
- each pair of spindles 31 is rigidly mounted cantilever on a single common support wall 48 (oriented radially), which is rigidly mounted on the coupling wheel 29 (as the spindles 31 do not perform any type of movement with respect to the coupling wheel 29).
- each support wall 48 is arranged between the two corresponding spindles 31 (i.e.
- the support wall 48 has, for each spindle 31, a through-opening 49 which is arranged under the spindle 31 and allows the passage of a holding head 42.
- a holding head 42 places the reinforcing member 18 under the spindle 31 passing through the through-opening 49 (illustrated in Figure 9 ) obtained through the support wall 48 of the spindle 31.
- the holding head 42 lays the reinforcing element 18 on the locking element 45 (arranged in the receiving position) by moving radially downwards and then releases the reinforcing element 18 on the locking element 45 thus moving away from the spindle 31.
- the rotation of the coupling wheel 29 around the rotation axis 30 brings the spindle 31 from the feeding station S1 to the feeding station S2 (as illustrated in Figure 14 ), in which, on the inside of the spindle 31, the group 14 of cigarettes is axially inserted (in the manner described above).
- the group 14 of cigarettes does not touch the reinforcing element 18 in any way, as the group 14 of cigarettes is arranged inside the spindle 31 while the reinforcing element 18 is arranged outside the spindle 31 and therefore the spindle 31 is interposed between the group 14 of cigarettes and the reinforcing element 18.
- the folding element 44 (which until now has remained in the receiving position) moves radially to the folding position in which the folding element 44 is pressed against the spindle 31 embracing the spindle 31 and then enables the "U"-folding of the reinforcing element 18 against the spindle 31 (i.e. the two side walls 20 of the reinforcing element 18 fold by 90° with respect to the front wall 19 of the reinforcing element 18).
- each spindle 31 receives only a reinforcing element 18 (which is housed outside the spindle 31 and is folded against the spindle 31) in the feeding station S1 and a group 14 of cigarettes (which is housed inside the spindle 31) in the feeding station S2.
- each spindle 31 (which has a different conformation as will be explained in the following) also receives a wrapping sheet 22 (which is housed outside the spindle 31 and is folded against the spindle 31 and above the reinforcing element 18) in a feeding station S4 (arranged between the feeding station S2 and the extraction station S3) provided with a feeding device 22 for the wrapping sheet (known and only schematically illustrated).
- a wrapping sheet 22 is partially arranged and folded in a "U"-shape around each spindle 31, which partially covers the spindle 31 and the reinforcing element 18 (previously fed); subsequently, in the extraction station S3, from each spindle 31, the group 14 of cigarettes, the reinforcing insert 18 and the wrapping sheet 22 are extracted together by means of a single common extracting device 32 so as to lay the wrapping sheet 22 and the reinforcing element 18 on the group 14 of cigarettes.
- the wrapping sheets 22 are fed directly around the groups 14 of cigarettes (coupled to the respective reinforcing elements 18) downstream of the extraction station S3 (and therefore do not affect in any way the spindles 31), while in the embodiment illustrated in Figure 16 the wrapping sheets 22 are fed to the spindles 31 (thus without initially touching the groups 14 of cigarettes) in the feeding station S4.
- each spindle 31 of the packaging machine 24 illustrated in Figure 16 comprises a tubular cavity 50, which is designed to contain a corresponding group 14 of cigarettes and has an inlet opening 51 at the support wall 48 and an outlet opening 52 opposite to the inlet opening 51; a group 14 of cigarettes enters the tubular cavity 50 of a spindle 31 through the inlet opening 51 (feeding station S2) and exits from the tubular cavity 50 through the outlet opening 52 (extraction station S3).
- each spindle 31 of the packaging machine 24 illustrated in Figure 16 comprises a flat upper wall 53 (of constant and very thin thickness) and a lower wall 54 which is opposite to the upper wall 53 and is shaped like a wedge (therefore it has a greater thickness with respect to the upper wall 53 and progressively increasing from the inlet opening 51 to the outlet opening 52).
- the lower wall 54 of each spindle 31 is provided with a series of sucking holes 55 which are connected (by means of small channels 56 formed inside the lower wall 54) to a channel 57 which communicates with a suction source (by means of suitable valve means controlled by the rotation of the coupling wheel 29 around the rotation axis 30).
- the rotation of the coupling wheel 29 around the rotation axis 30 brings the spindle 31 into the extraction station S3 in which the spindle 31 is emptied (i.e. from the inside of the spindle 31 a group 14 of cigarettes is extracted and a reinforcing element 18 and a wrapping sheet 22 are withdrawn from the outside of the spindle 31).
- the rotation of the coupling wheel 29 around the rotation axis 30 brings the spindle 31 into the feeding station S1.
- the (still flat) reinforcing element 18 is fed to the spindle 31 in the manner described previously with reference to Figures 10-13 ; then the front wall 19 of the reinforcing insert 18 is laid on the lower wall 54 of the spindle 31 (which holds the wall 19 by means of the suction exerted by the sucking holes 55).
- the lower wall 54 of the spindle 31 is inclined and holds the front wall 19 of the reinforcing insert 18 by suction (generated through the sucking holes 55), thus the locking element 45 is not provided, which is substituted by the sucking holes 55.
- the rotation of the coupling wheel 29 around the rotation axis 30 brings the spindle 31 into the feeding station S4.
- the folding element 44 is moved from the folding position to the receiving position so as to free the reinforcing element 18 and then the wrapping sheet 22 is folded into a "U"-shape around the spindle 31 (therefore around and in direct contact with the reinforcing element 18 which is arranged around the spindle 31 and around and in indirect contact with the group 14 of cigarettes, which is arranged inside the spindle 31).
- the wrapping sheet 22 is kept folded in a "U"-shape in contact with the spindle 31 by locking members (retaining members) of known type and not illustrated which act from the feeding station S4 (where the wrapping sheet 22 is fed) to the extraction station S3 (where the group 14 of cigarettes, the reinforcing insert 18 and the wrapping sheet 22 are extracted together by means of a single common extracting device 32).
- the coupling unit 26 couples, to each group 14 of cigarettes, an insert formed by the reinforcing element 18; according to a different embodiment not illustrated, the coupling unit 26 couples, to each group 14 of cigarettes, an insert formed by a coupon (in this case generally the coupon could not even be subjected to a "U"-fold, i.e. the coupon may not provide any type of folding).
- the embodiment illustrated in the attached Figures refers to the manufacturing of a packet of cigarettes, but the present invention is applicable without substantial modifications also to the manufacturing of any other type of packet of smoking articles (for example a packet of cigars, a packet of electronic cigarettes of the liquid vaporization type, a new generation packet of cigarettes without tobacco combustion).
- any other type of packet of smoking articles for example a packet of cigars, a packet of electronic cigarettes of the liquid vaporization type, a new generation packet of cigarettes without tobacco combustion.
- the wrapping method described above enables a simple, precise and reliable coupling of an insert (in particular a reinforcing element 18) and the wrapping sheet 22 to a group 14 of cigarettes; in this way, it is possible to operate at very high speed (expressed as the number of packets 1 of cigarettes produced per time unit), thus ensuring, at the same time, a perfect folding (i.e. with precise and square folding angles) of the insert (i.e. of the reinforcing element 18) and of the wrapping sheet 22 around the group 14 of cigarettes.
- the wrapping method described above can be implemented in a relatively simple and inexpensive manner in a packaging machine as it does not require particularly complex movements or parts having a large number of different movements.
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- Mechanical Engineering (AREA)
- Wrapping Of Specific Fragile Articles (AREA)
Description
- This patent application claims priority from Italian patent application no.
102018000008919 filed on 26/09/2018 - The present invention relates to a coupling method and to a unit to couple an insert and a wrapping sheet to a group of smoking articles in a packaging machine.
- The present invention finds advantageous application in a cigarette packaging machine to which the present description explicitly refers without thereby losing generality.
- A packaging machine for smoking articles is known from e.g.
WO 2016/166141 . It relates to a coupling method and a unit to couple an insert and a wrapping sheet to a group of smoking articles in that packaging machine. - A packet of cigarettes generally comprises an inner wrap, which is formed by a group of cigarettes wrapped in an inner wrapping sheet, and an outer casing, which encloses the inner wrap and can be formed by an outer wrapping sheet folded around the inner wrap and cup-shaped (soft type packet of cigarettes), or it can be formed by a rigid box with a hinged lid obtained by folding a rigid blank around the inner wrap (rigid type packet of cigarettes).
- In a packet of cigarettes an insert can also be provided, arranged inside the inner wrap (typically a protective element or a collar) or arranged between the inner wrap and the outer wrap (typically a collar and/or a coupon). The feeding of an insert is complex in that the insert must be arranged and kept in a precise position in contact with the group of cigarettes (above or below the inner wrapping sheet) without being glued to the group of cigarettes; only the subsequent folding of the outer wrap (insert arranged between the inner wrap and the outer wrap) or of the inner wrapping sheet (insert arranged inside the inner wrap) around the group of cigarettes stabilizes the position of the insert .
- The feeding of an insert is particularly complex when the insert must be inserted inside the inner wrap, that is, in direct contact with the group of cigarettes, since the group of cigarettes does not provide a uniform supporting surface and does not have a stable shape.
- Patent application
EP2008935A1 describes a wrapping method to couple an insert to a group of cigarettes. The group of cigarettes is fed to a first seat of a pocket (the first seat is shaped to contain only the group of cigarettes) while the insert is fed to a second seat of the pocket (the second seat is shaped to contain only the insert and is separated and arranged next to the first seat); subsequently, the group of cigarettes and the insert are extracted together from the pocket (i.e. from the respective seats of the pocket) by means of a single common extracting device so as to couple the insert to the group of cigarettes. - However, the wrapping method described in the patent application
EP2008935A1 does not allow to operate at a very high speed (expressed as the number of packets of cigarettes made in the time unit) while ensuring perfect folding (i.e. with precise and squared folding angles) of the insert around the group of cigarettes. - The object of the present invention is to provide a coupling method and unit to couple an insert and a wrapping sheet to a group of smoking articles in a packaging machine, the which coupling method and unit are easy and inexpensive to manufacture and allow an effective and efficient feeding of an insert and of a wrapping sheet to a group of smoking articles even when operating at very high speed.
- According to the present invention, a method and a coupling unit are provided to couple an insert and a wrapping sheet to a group of smoking articles in a packaging machine, according to what is set forth in the attached claims.
- The claims describe preferred embodiments of the present invention forming an integral part of the present disclosure.
- The present invention will now be described with reference to the annexed drawings, which illustrate a non-limiting embodiment, wherein:
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Figure 1 is a front perspective view and in a closed configuration of a packet of cigarettes made according to the present invention; -
Figure 2 is a rear perspective view of the packet of cigarettes ofFigure 1 in a closed configuration; -
Figure 3 is a front perspective view of the packet of cigarettes ofFigure 1 in an open configuration; -
Figure 4 is a front perspective view of an inner wrap of the packet ofFigure 1 in a closed configuration; -
Figure 5 is a perspective view of a group of cigarettes enclosed in the inner wrap ofFigure 4 ; -
Figure 6 is a perspective view of a reinforcing element coupled to the group of cigarettes ofFigure 5 and enclosed in the inner wrap ofFigure 4 ; -
Figure 7 is a plan view of a heat-sealable wrapping sheet used to make the inner wrap ofFigure 4 ; -
Figure 8 illustrates a schematic perspective view of a cigarette packaging machine which is designed to produce the inner wrap ofFigure 4 and is provided with a coupling unit made according to the present invention; -
Figure 9 is a perspective view of a detail of the coupling unit ofFigure 8 ; -
Figures 10-15 are a series of schematic views illustrating the coupling of an insert to a group of cigarettes in the coupling unit ofFigure 8 ; -
Figure 16 is a schematic front view of an alternative of the cigarette packaging machine ofFigure 8 ; -
Figure 17 is a longitudinal sectional view of a spindle of the packaging machine ofFigure 16 ; and -
Figures 18-21 are four schematic side views of the spindle ofFigure 17 in as many stations of the packaging machine ofFigure 16 . - In
Figures 1, 2 and3 number 1 denotes, as a whole, a rigid packet of cigarettes. Thepacket 1 of cigarettes comprises a cup-shapedouter container 2 made of cardboard or rigid paperboard and a sealed wrap 3 (better illustrated inFigure 8 ) housed inside thecontainer 2. - The
outer container 2 has an open upper end and is provided with alid 4, which is cup-shaped and is hinged to theouter container 2 along a hinge 5 (illustrated inFigure 2 ) so as to rotate, with respect to theouter container 2, between an open position (illustrated inFigure 3 ) and a closed position (illustrated inFigures 1 and 2 ) of the open upper end. Theouter container 2 has a substantially rectangular parallelepiped shape oriented in a prevalent vertical development direction, is cup-shaped, and has the upper end open, alower wall 6 opposite the upper open end, a front wall 7 and a rear wall 8 (in which thehinge 5 is formed) parallel and opposite to one another, and twoside walls 9 parallel and opposite to one another. - The
lid 4 has a substantially rectangular parallelepiped shape, is cup-shaped, and has an open lower end (facing the open upper end of theouter container 2 when thelid 4 is in the closed position), an upper wall 10 (which is parallel and opposite to thelower wall 6 of theouter container 2 when thelid 4 is in the closed position), a front wall 11 (which is parallel and aligned with the front wall 7 of theouter container 2 when thelid 4 is in the closed position), a rear wall 12 (which is parallel and aligned with therear wall 8 of theouter container 2 when thelid 4 is in the closed position and is hinged to therear wall 8 of theouter container 2 along the hinge 5), and twoside walls 13 parallel and opposite to one another (which are parallel and aligned with, in particular coplanar and adjacent, to theside walls 9 of theouter container 2 when thelid 4 is in the closed position). - The
wrap 3 encloses agroup 14 of cigarettes (partially illustrated inFigure 3 and fully illustrated inFigure 5 ) having a parallelepiped shape; moreover, thewrap 3 has an extraction opening 15 for the cigarettes, at the top and in front, closed by areusable closing label 16. - The
closing label 16 is fixed to thewrap 3 by means ofnon-dry re-stick glue 17, which is applied to the inner surface of the closing label 16 (i.e. the surface of theclosing label 16 facing the wrap 3) and is arranged around the extraction opening 15 so as to allow theclosing label 16 to be (i.e. at each opening of thepacket 1 of cigarettes) partially separated from thewrap 3 several times, and then, fixed again to the wrap 3 (at each closing of thepacket 1 of cigarettes). - The
closing label 16 is provided with a connectingtab 17, which is glued, permanently and in a non-separable manner, to the inner surface of thefront wall 11 of thelid 4 by means of the permanent glue which is applied to the outer surface of the closing label 16 (i.e. the surface of theclosing label 16 facing outwards, that is, from the opposite wall of the wrap 3). In this way, by opening or closing thelid 4, theclosing label 16 is also simultaneously opened and closed. - The
inner wrap 3 comprises a reinforcing element 18 (illustrated inFigure 6 ), which is made of cardboard or rigid paperboard (totally similar to the cardboard or rigid paperboard forming the outer container 2), is "U"-shaped and it is arranged inside theinner wrap 3 in contact with thegroup 14 of cigarettes. The reinforcingelement 18 comprises a rectangular-shaped front wall 19, which is arranged in contact with a front wall of thegroup 14 of cigarettes and a pair ofside walls 20, which are connected to the opposite sides of thefront wall 19 and are placed in contact with the side walls of thegroup 14 of cigarettes. Thefront wall 19 has a window which is arranged at the top, is delimited by anedge 21, is "U"-shaped, and facilitates the extraction of the cigarettes from thegroup 14 of cigarettes as it exposes an upper area of the front wall of thegroup 14 of cigarettes. - The function of the reinforcing
element 18 is to provide greater rigidness and greater shape stability to the sealedwrap 3 so as to prevent the sealedwrap 3 from collapsing in on itself after having extracted some of the cigarettes contained in the sealedwrap 3, thus making the extraction of the remaining cigarettes complicated and in particular making the opening and the subsequent closing of theclosing label 17 extremely complicated. A further function of the reinforcingelement 18 is to provide an adequate mechanical protection for the cigarettes during the forming and handling of the sealedwrap 3. Finally, another function of the reinforcingelement 18 is to keep thelid 4 in the closed position, since in order for thelid 4 to pass from the closed position to the open position (and vice versa) it must slightly elastically deform the upper and front part of the reinforcingelement 18. - As illustrated in
Figure 7 , thewrap 3 is obtained by folding a heat-sealable wrapping sheet 22, which has a rectangular shape, is folded around thegroup 14 of cigarettes and, once folded, is stabilized by heat-sealing (i.e. overlapping portions of thewrapping sheet 22 are connected to one another in a stable manner by heat-sealing). Thewrapping sheet 22 has anincision 23 which is "U"-shaped and defines theextraction opening 15 of thewrap 3; moreover, theclosing label 16 is completely glued to thewrapping sheet 22 which completely covers the incision 23 (i.e. the extraction opening 15). Between theclosing label 16 and thewrapping sheet 22 the pressure-sensitive re-stick glue (i.e. which does not dry) is interposed, which also allows, even after long time has passed and for a high number of times, to separate theclosing label 16 from thewrapping sheet 22 and then to re-join theclosing label 16 to thewrapping sheet 22. - In
Figure 8 ,number 24 denotes, as a whole, a packaging machine which makes thepacket 1 of cigarettes described above. - The
packaging machine 24 comprises a forming unit 25 (of a known type and schematically illustrated inFigure 8 ) in which thegroups 14 of cigarettes are formed in succession, acoupling unit 26 in which, to eachgroup 14 of cigarettes, acorresponding reinforcing element 18 is coupled, which is folded in a "U"-shape around thegroup 14 of cigarettes, a wrapping unit 27 (of a known type and only partially illustrated inFigure 8 ) in which around eachgroup 14 of cigarettes arespective wrapping sheet 22 is wrapped and heat-sealed for making a correspondinginner wrap 3, and a wrapping unit 28 (of a known type and schematically illustrated inFigure 8 ) in which a blank is folded around eachinner wrap 3 so as to form anouter container 2 and alid 4 to complete the making of apacket 1 of cigarettes. It is important to underline that thewrapping machine 24 could comprise only the formingunit 25, thecoupling unit 26 and the wrapping unit 27 (in this case eachinner wrap 3 is a marketable finished product). - The
coupling unit 26 comprises acoupling wheel 29 which is mounted rotatable around ahorizontal rotation axis 30 and supports four pairs of spindles 31 (only one of which is illustrated inFigure 8 for clarity). According to a different embodiment not illustrated, thecoupling wheel 29 could be replaced by a different type of conveyor, for example by a closed loop conveyor belt. Eachspindle 31 is tubular, has a parallelepiped shape, and is internally hollow to receive agroup 14 of cigarettes on the inside thereof; in particular, thegroup 14 of cigarettes axially enters through an end of thespindle 31 and axially exits from the opposite end. - The
coupling wheel 29 rotates with intermittent motion (i.e. cyclically alternating moving steps and stopping steps) to cyclically move each pair ofspindles 31 along a circular coupling path which crosses: a feeding station S1 in which agroup 14 of cigarettes is fed inside eachspindle 31 of a pair ofspindles 31, a subsequent feeding station S2 in which aninsert 18 is laid on an outer surface of eachspindle 31 of a pair of spindles 31 (therefore on the opposite side of thegroup 14 of cigarettes which is arranged inside the spindle 31), and finally an extraction station S3 in which from eachspindle 31 of a pair ofspindles 31 thegroup 14 of cigarettes and the reinforcinginsert 18 are extracted together by means of a single common extractingdevice 32 so as to lay the reinforcingelement 18 on thegroup 14 of cigarettes. - Accordingly, up to the extraction station S3, each reinforcing
element 18 is separated from thecorresponding group 14 of cigarettes, and therefore does not touch thecorresponding group 14 of cigarettes, as between the reinforcingelement 18 and thecorresponding group 14 of cigarettes aspindle 31 is interposed. In fact, up to the extraction station S3, each reinforcingelement 18 is laid on the outer surface of aspindle 31 whereas thecorresponding group 14 of cigarettes is arranged inside thespindle 31. - In the embodiment illustrated in the attached figures, the
coupling unit 26 operates on a double line, i.e. two parallel and coupled spindles 31 (a pair of spindles 31) simultaneously receive twocorresponding inserts 18 in the feeding station S1, simultaneously receive twocorresponding groups 14 of cigarettes in the feeding station S2, and simultaneously release the twogroups 14 of cigarettes together with theinserts 18 in the extraction station S3. According to an alternative, and perfectly equivalent embodiment, thecoupling unit 26 operates in a single line, i.e. asingle spindle 31 at a time receives acorresponding insert 18 in the feeding station S1, receives acorresponding group 14 of cigarettes in the feeding station S2, and releases thegroup 14 of cigarettes together with theinsert 18 in the extraction station S3. - In the embodiment illustrated in the accompanying figures, each reinforcing
element 18 is laid flat (i.e. without any type of folding) on the outer surface of the correspondingspindle 31 and is then folded in a "U"-shape around thespindle 31 after being laid flat on thespindle 31; in particular, each reinforcingelement 18 is laid flat on the outer surface of the correspondingspindle 31 in the feeding station S1 and is folded in a "U"-shape around thespindle 31 in the feeding station S2 after inserting thegroup 14 of cigarettes inside thespindle 31. - According to alternative embodiments, each reinforcing
element 18 could be laid flat (i.e. without any type of folding) on the outer surface of the correspondingspindle 31 and then folded in a "U"-shape around thespindle 31 before the feeding station S2 (directly in the feeding station S1 or in transit from the feeding station S1 to the feeding station S2), in the feeding station S2 and during the feeding of thegroup 14 of cigarettes, or downstream of the feeding station S2 (i.e. between the feeding station S2 and the extraction station S3). According to a further embodiment, each reinforcingelement 18 could be placed already folded in a "U"-shape around thespindle 31 in the feeding station S1, i.e. each reinforcingelement 18 could be folded in a "U"-shape against thespindle 31 in the feeding station S1 when laying the reinforcingelement 18 against the outer surface of thespindle 31. - In the embodiment illustrated in the accompanying figures, the feeding station S1, in which the reinforcing
elements 18 are laid on the outer surface of the correspondingspindles 31, is arranged upstream of the feeding station S2 in which thegroups 14 of cigarettes are inserted inside the correspondingspindles 31; according to an alternative embodiment, not illustrated, the feeding station S1, in which the reinforcingelements 18 are laid on the outer surface of the correspondingspindles 31, is arranged downstream of the feeding station S2 in which thegroups 14 of cigarettes are inserted inside the correspondingspindles 31. - The extracting
device 32, arranged in the extraction station S3, comprises twotwin pushers 33, each of which is movable with reciprocating motion and is inserted inside a correspondingspindle 31 for axially pushing both thegroup 14 of cigarettes (which is arranged inside the spindle 31), and the corresponding reinforcing element 18 (which is folded in a "U"-shape and is laid on an outer surface of the spindle 31) away from thespindle 31. According to a preferred embodiment illustrated in the attached figures, thewrapping unit 27 comprises twotwin folding tunnels 34 and thepushers 33 of the extractingdevice 32 insert the twogroups 14 of cigarettes, coupled to the corresponding reinforcingelements 18 into the twofolding tunnels 34; immediately downstream of the entrance of thefolding tunnels 34, the wrapping sheets 22 (not illustrated for clarity inFigure 8 ) are fed, which are intercepted by the twogroups 14 of cigarettes entering thefolding tunnels 34. - The feeding station S2 comprises two
twin pushers 35, each of which is movable with reciprocating motion and pushes acorresponding group 14 of cigarettes inside aspindle 31 standing still in the feeding station S2. In particular, the formingunit 25 cyclically arranges a pair ofgroups 14 of cigarettes in the feeding station S2 and in front of the pair ofspindles 31 which is standing still in the feeding station S2; in this way, the twopushers 35 can push the twogroups 14 of cigarettes into the correspondingspindles 31. According to a preferred embodiment, two compressingbodies 36 are arranged immediately upstream of the pair ofspindles 31 standing still in the feeding station S2, each of which is (internally) shaped like a funnel, is arranged in front of one end of the correspondingspindle 31 and elastically compresses thegroup 14 of cigarettes so as to reduce the size of the cross-section of thegroup 14 of cigarettes. In other words, beforehand, eachgroup 14 of cigarettes is passed through acorresponding compressing body 36 which elastically compresses thegroup 14 of cigarettes so as to reduce the size of the cross-section of thegroup 14 of cigarettes and thus facilitate the entry of thegroup 14 of cigarettes in the correspondingspindle 31 that is standing still. Alternatively, the compressingbodies 36 could be integrated into thespindles 31, each of which has the inlet end shaped like a funnel. - A
feeding device 37 is arranged in the feeding station S1, which cyclically feeds two reinforcingelements 18 to a pair ofspindles 31 standing still in the feeding station S1. Thefeeding device 37 comprises a feedingconveyor 38 which receives the reinforcingelements 18 from the bottom of a hopper (not illustrated) containing a stack of flat reinforcingelements 18 and feeds the flat reinforcingelements 18 near the pair ofspindles 31 standing still in the feeding station S1. In the embodiment illustrated in the attached figures, the feedingconveyor 38 comprises asuction belt 39 wound in a loop around two end pulleys 40 (at least one of which is motorized); according to an alternative embodiment not illustrated, the feedingconveyor 38 comprises a wheel mounted in a rotary manner. - The
feeding device 37 comprises atransfer device 41 which is movable for withdrawing a pair of reinforcingelements 18 from thesuction belt 39 of the feedingconveyor 38 and subsequently release the pair of reinforcingelements 18 to the corresponding twospindles 31 standing still in the feeding station S1. Thetransfer device 41 comprises two sucking holding heads 42, each of which is designed to grasp (by suction) a reinforcingelement 18 from the feedingconveyor 38, is designed to hold the reinforcingelement 18 during the movement from the feedingconveyor 38 to a correspondingspindle 31 and is designed to release the reinforcingelement 18 at thespindle 31. According to what is better illustrated inFigure 9 , each holdinghead 42 is shaped like a fork and has twotines 43, which engage opposite ends of theinsert 18 and are arranged at a distance from one another that is greater than the corresponding cross size of thespindle 31; consequently, the twotines 43 of each holdinghead 42 embrace the correspondingspindle 31 from opposite sides and engage the twoside walls 20 of the reinforcing element 18 (as clearly illustrated also inFigures 11 and12 ) . - According to the preferred (but non-binding) embodiment illustrated in
Figure 9 , to each spindle 31 a folding element 44 is coupled, which is "U"-shaped, is designed to embrace the spindle 31 to enable the "U"-folding of a reinforcing element 18 against the spindle 31, and is mounted in a movable manner on the coupling wheel 29 to move radially with respect to the spindle 31; in particular, each folding element 44 is movable radially (for example under the thrust of a cam actuated system which is set in motion by the rotation movement of the coupling wheel 29 around the rotation axis 30) between a receiving position (illustrated inFigures 10-14 ) in which the folding element 44 is relatively far away from the spindle 31 to allow a holding head 42 to feed a reinforcing element 18 to the spindle 31, and a folding position (illustrated inFigure 15 ) in which the folding element 44 is pressed against the spindle 31 thus embracing the spindle 31 and therefore enabling the "U"-folding of a reinforcing element 18 against the spindle 31 (in other words, the reinforcing element 18 is "moulded" into a "U"-shape by using the folding element 44 and the spindle 31 as "mould" and "counter-mould", respectively). - According to the preferred (but non-binding) embodiment illustrated in
Figure 9 , a lockingelement 45 is coupled to eachspindle 31, which is designed to lock a reinforcingelement 18 against thespindle 31 and is mounted in a movable manner on thecoupling wheel 29 to move radially with respect to the spindle 31 (independently of the corresponding folding element 44); in particular, each lockingelement 45 is radially movable (for example under the thrust of a cam actuated system which is set in motion by the rotation movement of thecoupling wheel 29 around the rotation axis 30) between a receiving position (illustrated inFigures 10-12 ) in which thelocking element 45 is relatively far away from thespindle 31 so as to allow a holdinghead 42 to feed a reinforcingelement 18 to thespindle 31, and a locking position (illustrated in theFigures 13-15 ) in which thelocking element 45 is pressed against thespindle 31 by clamping the reinforcingelement 18 against thespindle 31. - As better illustrated in
Figure 9 , eachfolding element 44 is arranged beside the corresponding lockingelement 45 and has a shape complementary to the shape of the locking element so that both thefolding element 44 and the lockingelement 45 can come into contact with the correspondingspindle 31 in a completely independent way. In particular, eachfolding element 44 is larger than the corresponding lockingelement 45 and has a through-opening, on the inside of which thelocking element 45 is arranged. As previously stated, the radial movement of thefolding element 44 is independent of the radial movement of the lockingelement 45 to allow the twoelements - As illustrated in
Figure 9 , each pair offolding elements 44 is rigidly mounted on a singlecommon support bar 46, which is mounted radially movable on thecoupling wheel 29, each pair of lockingelements 45 is rigidly mounted on a singlecommon support bar 47, which is mounted radially movable on thecoupling wheel 29 and is arranged beside thesupport bar 46, and each pair ofspindles 31 is rigidly mounted cantilever on a single common support wall 48 (oriented radially), which is rigidly mounted on the coupling wheel 29 (as thespindles 31 do not perform any type of movement with respect to the coupling wheel 29). In the feeding station S1, eachsupport wall 48 is arranged between the two corresponding spindles 31 (i.e. the twospindles 31 mounted cantilever on the support wall 48) and thefeeding device 37; to allow each holdinghead 42 to feed a reinforcingelement 18 to a correspondingspindle 31, thesupport wall 48 has, for eachspindle 31, a through-opening 49 which is arranged under thespindle 31 and allows the passage of a holdinghead 42. - With reference to
Figures 10-15 , the feeding of a reinforcingelement 18 and of agroup 14 of cigarettes to aspindle 31 is described in the following. - Initially and as illustrated in
Figure 10 , the rotation of thecoupling wheel 29 around therotation axis 30 brings thespindle 31 into the feeding station S1. - Once the
spindle 31 is standing still in the feeding station S1 and as illustrated inFigure 11 , a holdinghead 42 places the reinforcingmember 18 under thespindle 31 passing through the through-opening 49 (illustrated inFigure 9 ) obtained through thesupport wall 48 of thespindle 31. - As illustrated in
Figure 12 , the holdinghead 42 lays the reinforcingelement 18 on the locking element 45 (arranged in the receiving position) by moving radially downwards and then releases the reinforcingelement 18 on the lockingelement 45 thus moving away from thespindle 31. - As illustrated in
Figure 13 , once the holdinghead 42 has moved away from thespindle 31 leaving the reinforcingelement 18 laying on the locking element 45 (arranged in the receiving position), the lockingelement 45 moves from the receiving position to the locking position by clamping (pushing, pressing) the reinforcingelement 18 against thespindle 31. - Once the locking
element 45 has locked the reinforcingelement 18 against thespindle 31, the rotation of thecoupling wheel 29 around therotation axis 30 brings thespindle 31 from the feeding station S1 to the feeding station S2 (as illustrated inFigure 14 ), in which, on the inside of thespindle 31, thegroup 14 of cigarettes is axially inserted (in the manner described above). Obviously, in this step, thegroup 14 of cigarettes does not touch the reinforcingelement 18 in any way, as thegroup 14 of cigarettes is arranged inside thespindle 31 while the reinforcingelement 18 is arranged outside thespindle 31 and therefore thespindle 31 is interposed between thegroup 14 of cigarettes and the reinforcingelement 18. - Once the
group 14 of cigarettes has been axially inserted and as illustrated inFigure 15 , the folding element 44 (which until now has remained in the receiving position) moves radially to the folding position in which thefolding element 44 is pressed against thespindle 31 embracing thespindle 31 and then enables the "U"-folding of the reinforcingelement 18 against the spindle 31 (i.e. the twoside walls 20 of the reinforcingelement 18 fold by 90° with respect to thefront wall 19 of the reinforcing element 18). - In the embodiment illustrated in
Figure 8 , eachspindle 31 receives only a reinforcing element 18 (which is housed outside thespindle 31 and is folded against the spindle 31) in the feeding station S1 and agroup 14 of cigarettes (which is housed inside the spindle 31) in the feeding station S2. In the embodiment illustrated inFigure 16 , each spindle 31 (which has a different conformation as will be explained in the following) also receives a wrapping sheet 22 (which is housed outside thespindle 31 and is folded against thespindle 31 and above the reinforcing element 18) in a feeding station S4 (arranged between the feeding station S2 and the extraction station S3) provided with afeeding device 22 for the wrapping sheet (known and only schematically illustrated). - In other words, in the feeding station S4, a
wrapping sheet 22 is partially arranged and folded in a "U"-shape around eachspindle 31, which partially covers thespindle 31 and the reinforcing element 18 (previously fed); subsequently, in the extraction station S3, from eachspindle 31, thegroup 14 of cigarettes, the reinforcinginsert 18 and thewrapping sheet 22 are extracted together by means of a single common extractingdevice 32 so as to lay thewrapping sheet 22 and the reinforcingelement 18 on thegroup 14 of cigarettes. Consequently, in the embodiment illustrated inFigure 8 , thewrapping sheets 22 are fed directly around thegroups 14 of cigarettes (coupled to the respective reinforcing elements 18) downstream of the extraction station S3 (and therefore do not affect in any way the spindles 31), while in the embodiment illustrated inFigure 16 thewrapping sheets 22 are fed to the spindles 31 (thus without initially touching thegroups 14 of cigarettes) in the feeding station S4. - As illustrated in
Figure 17 , eachspindle 31 of thepackaging machine 24 illustrated inFigure 16 comprises atubular cavity 50, which is designed to contain acorresponding group 14 of cigarettes and has aninlet opening 51 at thesupport wall 48 and anoutlet opening 52 opposite to theinlet opening 51; agroup 14 of cigarettes enters thetubular cavity 50 of aspindle 31 through the inlet opening 51 (feeding station S2) and exits from thetubular cavity 50 through the outlet opening 52 (extraction station S3). Moreover, eachspindle 31 of thepackaging machine 24 illustrated inFigure 16 comprises a flat upper wall 53 (of constant and very thin thickness) and alower wall 54 which is opposite to theupper wall 53 and is shaped like a wedge (therefore it has a greater thickness with respect to theupper wall 53 and progressively increasing from the inlet opening 51 to the outlet opening 52). Thelower wall 54 of eachspindle 31 is provided with a series of suckingholes 55 which are connected (by means ofsmall channels 56 formed inside the lower wall 54) to achannel 57 which communicates with a suction source (by means of suitable valve means controlled by the rotation of thecoupling wheel 29 around the rotation axis 30). - With reference to
Figures 18-20 , the feeding of a reinforcingelement 18, of agroup 14 of cigarettes and of awrapping sheet 22 to aspindle 31 is described in the following. - Initially and as illustrated in
Figure 18 , the rotation of thecoupling wheel 29 around therotation axis 30 brings thespindle 31 into the extraction station S3 in which thespindle 31 is emptied (i.e. from the inside of the spindle 31 agroup 14 of cigarettes is extracted and a reinforcingelement 18 and awrapping sheet 22 are withdrawn from the outside of the spindle 31). - Subsequently and as illustrated in
Figure 19 , the rotation of thecoupling wheel 29 around therotation axis 30 brings thespindle 31 into the feeding station S1. Once thespindle 31 is standing still in the feeding station S1, the (still flat) reinforcingelement 18 is fed to thespindle 31 in the manner described previously with reference toFigures 10-13 ; then thefront wall 19 of the reinforcinginsert 18 is laid on thelower wall 54 of the spindle 31 (which holds thewall 19 by means of the suction exerted by the sucking holes 55). In this embodiment, thelower wall 54 of thespindle 31 is inclined and holds thefront wall 19 of the reinforcinginsert 18 by suction (generated through the sucking holes 55), thus the lockingelement 45 is not provided, which is substituted by the sucking holes 55. - Subsequently and as illustrated in
Figure 20 , the rotation of thecoupling wheel 29 around therotation axis 30 brings thespindle 31 into the feeding station S2. Once thespindle 31 is standing still in the feeding station S2, two operations are performed (in a more or less simultaneous manner): inside thespindle 31 thegroup 14 of cigarettes is inserted axially (with the methods described above) and the folding element 44 (which until now has always remained in the receiving position) moves radially in the folding position in which thefolding element 44 is pressed against thespindle 31 embracing thespindle 31 and therefore determining the "U"-folding of the reinforcingelement 18 against the spindle 31 (i.e. the twoside walls 20 of the reinforcingelement 18 are folded by 90° with respect to thefront wall 19 of the reinforcing element 18). - Subsequently and as illustrated in
Figure 21 , the rotation of thecoupling wheel 29 around therotation axis 30 brings thespindle 31 into the feeding station S4. Once thespindle 31 is standing still in the feeding station S4, thefolding element 44 is moved from the folding position to the receiving position so as to free the reinforcingelement 18 and then thewrapping sheet 22 is folded into a "U"-shape around the spindle 31 (therefore around and in direct contact with the reinforcingelement 18 which is arranged around thespindle 31 and around and in indirect contact with thegroup 14 of cigarettes, which is arranged inside the spindle 31). - The wrapping
sheet 22 is kept folded in a "U"-shape in contact with thespindle 31 by locking members (retaining members) of known type and not illustrated which act from the feeding station S4 (where thewrapping sheet 22 is fed) to the extraction station S3 (where thegroup 14 of cigarettes, the reinforcinginsert 18 and thewrapping sheet 22 are extracted together by means of a single common extracting device 32). - Subsequently and as illustrated in
Figure 18 , the rotation of thecoupling wheel 29 around therotation axis 30 brings the spindle 31 (again) into the extraction station S3 where thegroup 14 of cigarettes, the reinforcinginsert 18 and thewrapping sheet 22 are extracted together by means of a single common extractingdevice 32. Immediately downstream of the extraction station S3, the reinforcing insert 18 (already folded into a "U"-shape) rests against thegroup 14 of cigarettes and the U-shaped folding of thewrapping sheet 22 against thegroup 14 of cigarettes is completed (in thespindle 31, as illustrated inFigure 21 , the "U"-foldedsheet 22 is slightly open due to the wedge shape of thelower wall 54 of the spindle 31) . - In the embodiment described above, the
coupling unit 26 couples, to eachgroup 14 of cigarettes, an insert formed by the reinforcingelement 18; according to a different embodiment not illustrated, thecoupling unit 26 couples, to eachgroup 14 of cigarettes, an insert formed by a coupon (in this case generally the coupon could not even be subjected to a "U"-fold, i.e. the coupon may not provide any type of folding). - The embodiment illustrated in the attached Figures refers to the manufacturing of a packet of cigarettes, but the present invention is applicable without substantial modifications also to the manufacturing of any other type of packet of smoking articles (for example a packet of cigars, a packet of electronic cigarettes of the liquid vaporization type, a new generation packet of cigarettes without tobacco combustion...).
- The embodiments described herein can be combined with each other without departing from the scope of protection of the present claims.
- The wrapping method described above has numerous advantages.
- Firstly, the wrapping method described above enables a simple, precise and reliable coupling of an insert (in particular a reinforcing element 18) and the
wrapping sheet 22 to agroup 14 of cigarettes; in this way, it is possible to operate at very high speed (expressed as the number ofpackets 1 of cigarettes produced per time unit), thus ensuring, at the same time, a perfect folding (i.e. with precise and square folding angles) of the insert (i.e. of the reinforcing element 18) and of thewrapping sheet 22 around thegroup 14 of cigarettes. - Moreover, the wrapping method described above can be implemented in a relatively simple and inexpensive manner in a packaging machine as it does not require particularly complex movements or parts having a large number of different movements.
Claims (17)
- A coupling method to couple an insert (18) and a wrapping sheet (22) to a group (14) of smoking articles in a packaging machine (24); the coupling method comprises the steps of:feeding the group (14) of smoking articles into a tubular spindle (31), which is internally hollow and has the shape of a parallelepiped; andlaying the insert (18) on an outer surface of the spindle (31) ;the coupling method is characterized in that it comprises the further steps of:laying the wrapping sheet (22) on the outer surface of the spindle (31); andextracting from the spindle (31) the group (14) of smoking articles, the insert (18) and the wrapping sheet (22) together by means of one single common extracting device (32), so as to lay the insert (18) and the wrapping sheet (22) on the group (14) of smoking articles.
- The coupling method according to claim 1 and comprising the further step of folding the insert (18) around the spindle (31) at least in a "U"-shape.
- The coupling method according to claim 2 and comprising the further steps of:laying the insert (18) flat on an outer surface of the spindle (31); andfolding the insert (18) around the spindle (31) in a "U"-shape after having laid the insert (18) flat on the spindle (31) .
- The coupling method according to claim 2 or 3, wherein the insert (18) is folded in a "U"-shape around the spindle (31) by moving a "U"-shaped folding element (44) towards the spindle (31), so as to push the insert (18) against the spindle (31).
- The coupling method according to one of the claims from 1 to 4 and comprising the further step of locking the insert (18) against the spindle (31) by generating a suction through at least one wall (54) of the spindle (31).
- The coupling method according to claim 5, wherein the spindle (31) has a lower wall (54), which is provided with a series of sucking holes (55) and is shaped like a wedge.
- The coupling method according to claim 6, wherein the lower wall (54) of the spindle (31) has a thickness progressively increasing from an inlet opening (51) of the group (14) of smoking articles to an outlet opening (52) of the group (14) of smoking articles.
- The coupling method according to one of the claims from 1 to 7 and comprising the further step of folding the insert (18) around the spindle (31) in a "U"-shape by moving a "U"-shaped folding element (44) towards the spindle (31), so as to push the insert (18) against the spindle (31).
- The coupling method according to one of the claims from 1 to 8 and comprising the further step of folding the wrapping sheet (22) on the insert (18) and around the spindle (31) in a "U"-shape.
- The coupling method according to one of the claims from 1 to 9 and comprising the further step of moving a coupling conveyor (29), which supports the spindle (31), along a coupling path and through:a first feeding station (S1), where the insert (18) is laid on the outer surface of the spindle (31),a second feeding station (S2), which is arranged downstream of the first feeding station (S1) and where the group (14) of smoking articles is fed into the spindle (31),a third feeding station (S4), which is arranged downstream of the first feeding station (S1) and where the wrapping sheet (22) is laid on the outer surface of the spindle (31); andfinally, an extraction station (S3), where the group (14) of smoking articles, the insert (18) and the wrapping sheet (22) are extracted together from the spindle (31).
- The coupling method according to claim 10, wherein the second feeding station (S2) is arranged between the first feeding station (S1) and the third feeding station (S4).
- The coupling method according to claim 10 or 11 and comprising the further step of folding the insert (18) around the spindle (31) at least in a "U"-shape at the second feeding station (S2).
- The coupling method according to claim 10, 11 or 12, wherein two spindles (31), which are beside and coupled to one another, simultaneously receive two corresponding inserts (18) in the first feeding station (S1), simultaneously receive two corresponding groups (14) of smoking articles in the second feeding station (S2), simultaneously receive two corresponding wrapping sheets (22) in the third feeding station (S4), and simultaneously release the two groups (14) of smoking articles together with the inserts (18) and the wrapping sheets (22) in the extraction station (S3).
- The coupling method according to one of the claims from 1 to 13 and comprising the further steps of:feeding, by means of a feeding conveyor (38), an insert (18) in proximity to the spindle (31);engaging the insert (18) carried by the feeding conveyor (38) by means of a sucking holding head (42); andmoving the sucking holding head (42) from the feeding conveyor (38) to the spindle (31) so as to lay the insert (18) on the spindle (31).
- The coupling method according to claim 14, wherein the sucking holding head (42) is shaped like a fork and has two tines (43), which engage opposite ends of the insert (18) and are arranged at a distance from one another that is greater than the corresponding cross size of the spindle (31) .
- The coupling method according to claim 14 or 15, wherein the spindle (31) is mounted in a support wall (48), which is oriented perpendicularly to the spindle (31) and has a through-opening (49), which is arranged under the spindle (31) and allows the passage of the holding head (42) .
- A coupling unit (26) to couple an insert (18) to a group (14) of smoking articles in a packaging machine (24); the coupling unit (26) comprises:a tubular spindle (31), which is internally hollow and has the shape of a parallelepiped;a coupling conveyor (29), which supports and feeds the spindle (31);a first feeding station (S1), where the group (14) of smoking articles is fed into the spindle (31); anda second feeding station (S2), where the insert (18) is laid on an outer surface of the spindle (31);the coupling unit (26) is characterized in that it comprises:a third feeding station (S4), where the wrapping sheet (22) is laid on the outer surface of the spindle (31); andan extraction station (S3), where the group (14) of smoking articles, the insert (18) and the wrapping sheet (22) are extracted together from the spindle (31) by means of one single common extracting device (32), so as to lay the insert and the wrapping sheet (22) on the group (14) of smoking articles.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL19020543T PL3628604T3 (en) | 2018-09-26 | 2019-09-26 | Coupling method and unit to couple an insert and a wrapping sheet to a group of smoking articles in a packaging machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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IT201800008919 | 2018-09-26 |
Publications (2)
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EP3628604A1 EP3628604A1 (en) | 2020-04-01 |
EP3628604B1 true EP3628604B1 (en) | 2021-05-26 |
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EP19020543.5A Active EP3628604B1 (en) | 2018-09-26 | 2019-09-26 | Coupling method and unit to couple an insert and a wrapping sheet to a group of smoking articles in a packaging machine |
Country Status (2)
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EP (1) | EP3628604B1 (en) |
PL (1) | PL3628604T3 (en) |
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WO2023126773A1 (en) * | 2021-12-29 | 2023-07-06 | R.A Jones & Co. | Packaging unit for packaging articles in boxes and method for packaging articles in boxes |
WO2023126837A1 (en) * | 2021-12-29 | 2023-07-06 | R.A Jones & Co. | Packaging unit for packaging articles in boxes and method for packaging articles in boxes |
IT202100032948A1 (en) * | 2021-12-29 | 2023-06-29 | Jones & Co Inc R A | Unit of packing items into boxes and method of packing items into boxes |
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US7827767B2 (en) | 2007-06-26 | 2010-11-09 | G.D Societa' Per Azioni | Method and packing machine for combining an insert and a group of cigarettes |
WO2014181161A1 (en) * | 2013-05-06 | 2014-11-13 | Gima Tt S.R.L. | Method and related apparatus for the production of a sealed wrapper |
WO2016166141A1 (en) * | 2015-04-15 | 2016-10-20 | Gima Tt S.P.A. | Method and related apparatus for manufacturing a sealed wrapping of a bundle of cigarettes |
-
2019
- 2019-09-26 PL PL19020543T patent/PL3628604T3/en unknown
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EP3628604A1 (en) | 2020-04-01 |
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