EP0792805A1 - Verpackungsmaschine,insbesondere für Zigaretten oder dergleichen - Google Patents

Verpackungsmaschine,insbesondere für Zigaretten oder dergleichen Download PDF

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Publication number
EP0792805A1
EP0792805A1 EP97102647A EP97102647A EP0792805A1 EP 0792805 A1 EP0792805 A1 EP 0792805A1 EP 97102647 A EP97102647 A EP 97102647A EP 97102647 A EP97102647 A EP 97102647A EP 0792805 A1 EP0792805 A1 EP 0792805A1
Authority
EP
European Patent Office
Prior art keywords
cigarettes
slip
discs
machine
suction
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.)
Withdrawn
Application number
EP97102647A
Other languages
English (en)
French (fr)
Inventor
Nicola Martoccia
Stefano Malossi
Alessandro Morselli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sasib Tobacco SpA
Original Assignee
SASIB SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SASIB SpA filed Critical SASIB SpA
Publication of EP0792805A1 publication Critical patent/EP0792805A1/de
Withdrawn legal-status Critical Current

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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
    • B65B19/228—Preparing and feeding blanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/06—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths
    • B65B11/28—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a curved path, e.g. on rotary tables or turrets
    • B65B11/30—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a curved path, e.g. on rotary tables or turrets to fold the wrappers in tubular form about contents

Definitions

  • the invention relates to a packing machine for cigarettes, or similar, comprising
  • the means for feeding the slips and positioning the slips into the station for combination with the group of cigarettes are made of wheels, pairs of adjacent discs or pairs of adjacent suction belts, which are part of a separate operating assembly.
  • the means for feeding and positioning the wrapping slips may be integrated into a single operating unit with the means for feeding the orderly groups of cigarettes to the combining station.
  • Cigarette packing machines are made of a great number of actuators, feeders, and controllers, which all are to operate together in perfect synchronism with each other and at very high speeds. Since, for ensuring this high synchronization accuracy at high speeds, the operating units have to draw the driving motion, through mechanical transmissions, from a common main motor, the eventually large number of the said operating units is a burden to the torque demanded of the motor itself and a limit to the attainable operating speeds. A further load to this situation is the fact that the said packing machines have a stepping operation, so that all members are alternately accelerated and decelerated.
  • the large quantity of operating units particularly in the area over which the groups of cigarettes are transferred from the means for forming the said groups to the combining station, results in an overload of the said area, blocking the view for a visual control of the machine operation and consistently slackening the eventual intervention of the operator in case of malfunction.
  • the invention is intended to provide a packing machine of the type described hereinbefore, in such a way that, by means of relatively simple and cheap expedients, the number of operating units may be reduced, ensuring, at the same time, a more rational construction, and generating the possibility to reach higher operating speeds, within the range of the required synchronization accuracy, and with no further efforts for the drive motor and the widest view of and accessibility to the area for transfer and combination of the cigarettes with the slips.
  • the invention reaches the above stated purposes providing a packing machine of the type described hereinbefore, in which the means for positioning the slip into the station for its combination with the group of cigarettes are made of and integrated to the forming unit itself.
  • the forming unit is provided with a plurality of compartments, which are sequentially movable, on an annular path, along which there are provided one or more stations for folding the wrapping slip, between the station for combination of the wrapping slip itself with the cigarettes and a discharge station, there being associated to each compartment some specific means for grasping/positioning a wrapping slip.
  • a forming unit of the said type may advantageously consist of a grooved wheel, in which the grooves are pockets with a predetermined shape for housing their respective groups of cigarettes and the associated slip folded around them in a U shape, the grooves being spaced at equal angular distances on the periphery of the wheel, and at least the circumferential, radially outer side, and the two sides parallel to the wheel faces being made to be completely open, while, at each axial end of the grooves, and at least in an angularly advanced position, with respect to the corresponding grooves - referring to the direction of rotation - for each groove there is provided a pair of circular suction sectors, for grasping the wrapping slip and picking it up from the feeding means.
  • the suction sectors are placed radially outermost with respect to the open circumferential side of the grooves, so that the wrapping slip gets to be arranged in front of the said open circumferential side of its corresponding groove and in an intermediate position betwen the latter and the corresponding group of cigarettes.
  • the grooves are not substantially U-shaped pockets, with their radial sides and their circumferential radially inner side being continuously closed, and with the edges for delimitation of the circumferential side, open on the two sides parallel to the axis of the wheel, being stationary folders for a U-folding of the slip around the group of cigarettes on joint introduction of the slip and the group of cigarettes into the associated groove, but a pair of U-shaped cradles, being radially orientated and axially aligned with each other, the said cradles being provided in two adjacent and coaxial discs respectively, the said discs being at such an axial distance from each other that the distance between the two outer faces of the two discs corresponds to the length of the cigarettes.
  • the cigarettes are housed in the grooves, with their axes parallel to the axes of the forming wheel, that is those of the coaxial discs.
  • a stationary folder the rear one, is made of a plate, supported by the common stationary axis about which the two discs rotate, and may extend for the whole radial depth of the corresponding side of the cradles, up to the peripheral edge of the discs, whereas the front stationary folder, referring to the direction of rotation, is integrated with a stationary folder, whose assigned task is to fold the front flap of the slip - still referring to the direction of rotation - radially projecting outwards from the open circumferential side of the U-shaped cradles, against the corresponding side of the group of cigarettes during the first step of rotation.
  • the said stationary folder accomplishes two functions, both of U-folding the slip on its introduction with the cigarettes into the groove, and of folding the projecting front flap during the first step of rotation of the discs, and may be formed, for example, by a blade, disposed flush with the front radial sides of the U-shaped cradles - referring to the direction of rotation - and extending from the peripheral edge of the discs until it reaches a radius corresponding to the radial space taken by the cigarettes inside the grooves.
  • the means for feeding the slip thereto include a suction transfer drum, which is driven in such a way as to execute an angular differential motion, complying with that of the forming wheel, that is of the discs.
  • the transfer drum has only one suction circular sector for grasping the slip, which extends over at least part of the angular width with respect to the total length of the slip in the direction of advance, and which can only interact either with the drum of the feeding means or with the forming wheel, while the rotary drive means are made in such a way that, when the said suction sector of the transfer drum interacts with the suction sectors of the forming wheel, it executes a differential angular motion which is perfectly synchronized with and at the same speed as the forming wheel whereas, when it interacts with the slip feeding drum, the said suction sector moves with an angular motion, which is constant and complying with that of the feeding drum.
  • the said suction sector is interposed between the forming wheel and the slip feeding drum, the said two parts being substantially arranged in diametrically opposite positions with respect to the axis of the transfer drum.
  • the invention also relates to other objects which form the subject of the dependent claims.
  • a packing machine comprises a station A for combination of an orderly group G of cigarettes S with a wrapping slip F.
  • the orderly groups G of cigarettes S are sequentially fed by means of a so-called box conveyor 1, that is a continuous conveyor belt 201 bearing a plurality of substantially tubular compartments 101, in which the groups of cigarettes G are formed.
  • the groups of cigarettes G which, in the example, are carried transversely to the axis of the cigarettes S, are moved in the axial direction of the cigarettes S from the corresponding tubular compartment 101, by means of an axial pusher 2, into a duct 3 for transfer of the groups G of cigarettes S to the station for combination with the slip F.
  • the groups G of cigarettes S are moved into the transfer duct 3 along a straightaway path by means of pulling means 4, which are movable alternately to and fro along the transfer duct 3 and, additionally, into a position of penetration in the said transfer duct 3, engaging the group G of cigarettes between a front fork 104 and a rear fork 204.
  • the forks 104, 204 are downwardly protruding, and the pulling means 4 are movable from the said position of penetration and a position of extraction from the said transfer duct 3, in which they do not interfere with the group G of cigarettes S, on execution of the return travel.
  • the path 3 along which the cigarettes are transferred into the station A for combination with the slip F, as well as the means 4 for moving the cigarettes S along this path may also be different from those illustrated.
  • a forming wheel 5 having a plurality of radial peripheral grooves 6.
  • the grooves 6 are open at their peripheral, circumferential side, and at their axial ends, that is on the opposite faces of the wheel 5.
  • the wheel 5 is supported rotatably about an axis which is transverse to the direction of feed of the groups G of cigarettes, that is parallel to the cigarettes themselves.
  • the axis of rotation of the wheel is provided substantially at the same level as the median plane of the transfer path 3 for the groups G of cigarettes, so that the single grooves 6 may be carried by sequences in front of the exit side of the duct 3 for transfer to the combining station A. In this position, the grooves 6 are perfectly aligned on the ideal coaxial extension of the transfer duct 3, so that the group G of cigarettes S may be inserted into the corresponding groove by a simple translation onwards.
  • the forming wheel 5 is composed of two discs 105, 105', which are mounted rotatably on two stationary and coaxial shaft bodies 7, one of which bears, between the two discs, the projecting compartment case 8 of a following member 9.
  • the two discs 105, 105' have no mechanical linking elements and are driven by two identical kinematic chains each for one single disc 105, 105'. Both these kinematic chains draw the driving motion from a common main motor-driven shaft (not shown).
  • the two discs 105, 105' execute a perfectly synchronized rotary motion with no need for intermediate axial means for mechanical linkage to each other.
  • the grooves 6 are only formed by U-shaped cradles in axially coinciding positions on each disc 105, 105'.
  • the U-shaped cradles are formed by properly shaped radial notches 205, made in the discs 105, 105' themselves and open on the peripheral edges of the latter.
  • each disc 105, 105' has, on its peripheral edge, a suction sector 305.
  • the suction sectors have a limited angular width and are made of hollow blades, provided with suction holes communicating outwards with their peripheral side, the said blades being axially widened inwards towards the adjacent disc 105, 105'.
  • the hollow of the suction blades of each disc 105, 105' is connected, through radial ducts 405, to a rotating distributor for each disc 105, 105'.
  • each disc 105, 105' is associated to a distributing sole 10, which has a distributing throat in the form of a circular sector 110, and, coinciding with the said throat, that is at the same radial distance of the said throat 110 on the adjacent face of the corresponding disc 105, 105', there are provided the outlets of ducts or axial holes 505, communicating with radial connecting ducts 405, which lead to the suction sectors 305.
  • Each distributor 10 is connected separately, through ducts 11 to the vacuum source. Therefore, the suction sectors 305 of each disc 105, 105' are fed separately. This prevents the connecting ducts of the suction sectors 305 of the two discs 105, 105' from having different lengths, and consequently from asymmetries in the suction effect exerted by the two adjacent suction sectors 305. Since the suction sectors 305 are alternately connected to the vacuum source and to atmospheric pressure or to a pressure source, the length difference between the connecting ducts of the two suction sectors 305 implies slightly spaced times of exertion of the necessary vacuum for picking up and holding back the slip. These times, however, become considerable when, like in packing machines, the operating speed is very high. The slip F picked up by the suction sectors 305 might then take a slightly staggered position with respect to the optimal one, with the consequent production of reject packs.
  • the suction sectors 305 terminate at the open side of the grooves 6, that is of the notches 205.
  • the radial dimension of the discs 105, 105' is such that the peripheral edges of the two discs 105, 105', in perfect axial alignment, are disposed only at a short distance from the outlet end of the duct 3 for transfer of the groups G of cigarettes S.
  • the distance between the two discs 105, 105' is such, that the ends of the cigarettes S extend flush with the outer face of the corresponding disc, or at least with the portion thereof coinciding with the edge of the notches 205.
  • the slip F generally has an axial size, which is larger than the distance between the two discs 105, 105' and than the length of the cigarettes S, and it is held back by the peripheral suction sectors 305 in a median area of its extension in the axial direction of the cigarettes and in the front part with reference to the direction of advance. Instead, the following part of the slip F, that is the portion coinciding with the aperture of the groove 6 and the tail extending beyond the groove 6 are free.
  • the grooves 6, that is the pairs of adjacent U-shaped cradles 205 of the discs 105, 105', disposed on the coaxial extension of the duct 3 for transfer of the groups of cigarettes have their radial sides, the front and the rear ones - referring to the direction of rotation - aligned with a stationary folder 13, 14 respectively.
  • These stationary folders 13, 14 may be of any type and must substantially form two edges 113, 114, which are aligned each with one of the two radial sides, the front and the rear ones, of the grooves 6, and against which, on simultaneous transfer of the group G of cigarettes S, and of the slip F, which is interposed between the former and the groove 6, that is also the stationary folders 13, 14, this slip F is U-folded around the circumferential inner sides and the two radial sides of the group G of cigarettes S with reference to the associated groove 6.
  • the stationary folder associated to the rear radial side of the notches 205 is made of a stationary plate 13, which is carried projectingly, radially out of the case 8 of the follower 9, the said case being mounted on the stationary axis of rotation between the two discs 105, 105'.
  • the said plate 13 is on the same plane as the sliding surface 103 of the duct 3 for transfer of the groups G of cigarettes S to the combining station A, or at least as the terminal segment of the said duct 3 in coincidence with the combining station A.
  • the other folder associated to the front radial sides of the grooves 6 is made of a blade 14, which is carried projectingly in an intermediate position between the two discs 105, 105' and which extends parallel to the plate 13.
  • the blade 14 is on the same plane as the top 203 of the duct 3 for transfer of the groups G of cigarettes S to the combining station A.
  • the front stationary folding blade 14 extends radially inwards from the peripheral edge of the discs 105, 105' to an extent corresponding to the difference between the radial space taken by the group G of cigarettes S inside the groove 6 and the external radius of the discs 105, 105'.
  • the slip F is released while being transferred into the groove 6 together with the cigarettes, through connection of the suction sectors 305 either to atmospheric pressure or to a pressure source.
  • the slots shaped as circular sectors 110 of the rotating distributors 10 must be properly positioned, angularly with respect to the angular position of the feed ducts 505, 405, connected to the suction sectors themselves. There may be provided both that suction does not stop before the slip being held pressed, together with the group G of cigarettes S, between the pusher 15 and the follower 9, or, as fig.
  • the suction may be interrupted at the moment in which the groove 6 and thus the slip F reach the correct combining position of the latter with the group G of cigarettes S. This is possible for the fact that a certain period is needed before compensation of vacuum, so that the effect of release of the slip F by the suction sectors 305 is not simultaneous but is produced after a certain delay with respect to the moment of stopping the vacuum source or of closing the connections thereto.
  • a transfer drum 18 which has a suction sector 118, of such an angular width that its peripheral, circumferential extension substantially corresponds to the length of the slip in the direction of feed.
  • the suction sector 118 is made of two radial ribs projecting from a common hub, whose axial distance from each other corresponds to the distance between the suction sectors 305 of the forming wheel 5.
  • the suction sectors 118 of the transfer drum 18 are made so as to be substantially analogous to those 305 of the discs 105, 105' of the forming wheel 5, and their alternate connection to the vacuum source (not shown) and to atmospheric pressure, or to a pressure source is carried out through means that are analogous to those used for the suction sectors 305 of the discs 105, 105' of the forming wheel 5. Consequently, as shown in figs. 1 and 3, here too there are provided rotating distributors or valves, for example rotating soles 10', supplied with distributing throats in the form of circular sectors 110, which coincide with the inlets of the connection ducts 218. In this case too, the suction sectors 118 on the two sides of the slip F are connected separately 19, 19' to the vacuum source and to atmospheric pressure or to the pressure source through separate distributing soles 10'.
  • the transfer drum 18 interacts alternately either with the forming wheel 5 or with the feeding drum T and is driven rotatably in a differential manner and in synchronism with, and at the same speed as, the forming wheel 5, and the feeding drum T alternately.
  • the differential rotary motion of the transfer drum 18 is obtained by means of a drive kinematic chain, in which there are provided at least one crank transmission and at least one intermitter with parallel axes, in a cascade arrangement, while the driving motion of the kinematic chain 20 is drawn from the shaft 21 of the feeding drum T.
  • a first transmission shaft 120 is driven rotatably from the driving shaft 21 of the feeding drum T, by means of a crank coupling 220, in which the crankpin is excentrically and rotatably engaged with the said driving shaft 21 of the feeding drum T.
  • the first transmission shaft 120 drives a second crank 320 which is linked, by means of an arm 420, to a third crank 620, fixed to the input camshaft 520 of an intermitter with parallel axes, whose output shaft 720 directly drives the transfer drum 18.
  • a device for preventing the crank 620 from reversing the direction of rotation while passing through dead points is also provided.
  • the combination of the three cranks 220, 320, 620 and of the intermitter with parallel axes 520, 720, allows for a rotary behaviour of the transfer drum 18, such that when it interacts with the forming wheel 5, and when it interacts with the feeding drum T, the said transfer drum 18 always rotates at the same speeds of the forming wheel 5 and of the feeding drum T respectively, thus ensuring the best conditions for transferring the slip F.
  • a further advantage is the fact that, with the lack of separate means for positioning the slip F, which are generally placed over the duct 3 for transfer of the groups G of cigarettes S, the latter is easily accessible both visually and directly with hands or with the necessary tools, by the personnel on duty, consistently simplifying the eventual simple control operations and the elimination of eventual improperly disposed groups of cigarettes.
  • the duct 3 for transfer of the groups G of cigarettes S and the pulling means 4 are completely free and easily reachable from the upper side.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vending Machines For Individual Products (AREA)
  • Wrapping Of Specific Fragile Articles (AREA)
EP97102647A 1996-03-01 1997-02-19 Verpackungsmaschine,insbesondere für Zigaretten oder dergleichen Withdrawn EP0792805A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT96SV000009A IT1288130B1 (it) 1996-03-01 1996-03-01 Macchina impacchettatrice, in particolare per sigarette, o simili
ITSV960009 1996-03-01

Publications (1)

Publication Number Publication Date
EP0792805A1 true EP0792805A1 (de) 1997-09-03

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ID=11408157

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97102647A Withdrawn EP0792805A1 (de) 1996-03-01 1997-02-19 Verpackungsmaschine,insbesondere für Zigaretten oder dergleichen

Country Status (2)

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EP (1) EP0792805A1 (de)
IT (1) IT1288130B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1533232A1 (de) * 2003-11-21 2005-05-25 G.D Societ Per Azioni Verpackungsvorrichtung
DE102004012642A1 (de) * 2004-03-12 2005-10-13 Hauni Maschinenbau Ag Vorrichtung und Verfahren zur Verpackung von Produkten der Tabak verarbeitenden Industrie
CN107161377A (zh) * 2017-07-03 2017-09-15 天津市茂林烟机配件开发有限公司 扁烟盒低速硬盒包装机上的改进型鼓轮组件结构
ITUA20161853A1 (it) * 2016-03-21 2017-09-21 Gd Spa Unità e metodo di incarto per piegare un foglio di incarto attorno ad un articolo

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1511585A1 (de) * 1966-04-16 1969-09-11 Focke Pfuhl Verpack Automat Vorrichtung zum U-foermigen Umlegen von insbesondere Folienzuschnitten um Packungen
US4358920A (en) * 1980-06-04 1982-11-16 Lotte Co., Ltd. Apparatus for wrapping a sheet article
GB2195314A (en) * 1986-09-24 1988-04-07 Gd Spa Cigarette packaging machine
GB2244970A (en) * 1990-06-11 1991-12-18 Gd Spa Wrapping cigarettes packets
EP0519402A1 (de) * 1991-06-21 1992-12-23 G.D Societa' Per Azioni Verfahren und Vorrichtung zum Versehen von Gegenständen mit einer schlauchförmigen Verpackungshülle
EP0553636A1 (de) * 1992-01-28 1993-08-04 Tokyo Automatic Machinery Works Limited Vorrichtung zum Verpacken von schachtelartigen Gegenständen, zum Beispiel Zigaretten, mittels einer Verpackungsfolie
EP0614811A1 (de) * 1993-03-10 1994-09-14 SASIB S.p.A. Vorrichtung zum Zuführen von Wickelzuschnitten, insbesondere zur Anwendung in Zigarettenverpackungsmaschinen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1511585A1 (de) * 1966-04-16 1969-09-11 Focke Pfuhl Verpack Automat Vorrichtung zum U-foermigen Umlegen von insbesondere Folienzuschnitten um Packungen
US4358920A (en) * 1980-06-04 1982-11-16 Lotte Co., Ltd. Apparatus for wrapping a sheet article
GB2195314A (en) * 1986-09-24 1988-04-07 Gd Spa Cigarette packaging machine
GB2244970A (en) * 1990-06-11 1991-12-18 Gd Spa Wrapping cigarettes packets
EP0519402A1 (de) * 1991-06-21 1992-12-23 G.D Societa' Per Azioni Verfahren und Vorrichtung zum Versehen von Gegenständen mit einer schlauchförmigen Verpackungshülle
EP0553636A1 (de) * 1992-01-28 1993-08-04 Tokyo Automatic Machinery Works Limited Vorrichtung zum Verpacken von schachtelartigen Gegenständen, zum Beispiel Zigaretten, mittels einer Verpackungsfolie
EP0614811A1 (de) * 1993-03-10 1994-09-14 SASIB S.p.A. Vorrichtung zum Zuführen von Wickelzuschnitten, insbesondere zur Anwendung in Zigarettenverpackungsmaschinen

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1533232A1 (de) * 2003-11-21 2005-05-25 G.D Societ Per Azioni Verpackungsvorrichtung
US7127873B2 (en) 2003-11-21 2006-10-31 G.D. Societa' Per Azioni Product packing unit
CN100443376C (zh) * 2003-11-21 2008-12-17 吉第联合股份公司 产品包装设备
DE102004012642A1 (de) * 2004-03-12 2005-10-13 Hauni Maschinenbau Ag Vorrichtung und Verfahren zur Verpackung von Produkten der Tabak verarbeitenden Industrie
ITUA20161853A1 (it) * 2016-03-21 2017-09-21 Gd Spa Unità e metodo di incarto per piegare un foglio di incarto attorno ad un articolo
EP3222538A1 (de) * 2016-03-21 2017-09-27 G.D Societa' Per Azioni Umhüllungsvorrichtung und verfahren
EP3222538B1 (de) 2016-03-21 2019-01-02 G.D Societa' Per Azioni Umhüllungsvorrichtung und verfahren
CN107161377A (zh) * 2017-07-03 2017-09-15 天津市茂林烟机配件开发有限公司 扁烟盒低速硬盒包装机上的改进型鼓轮组件结构

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Publication number Publication date
ITSV960009A1 (it) 1997-09-01
IT1288130B1 (it) 1998-09-10
ITSV960009A0 (de) 1996-03-01

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