EP3772467B1 - Procede et appareil pour appliquer des etiquettes sur des produits de tabac - Google Patents

Procede et appareil pour appliquer des etiquettes sur des produits de tabac Download PDF

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Publication number
EP3772467B1
EP3772467B1 EP20189706.3A EP20189706A EP3772467B1 EP 3772467 B1 EP3772467 B1 EP 3772467B1 EP 20189706 A EP20189706 A EP 20189706A EP 3772467 B1 EP3772467 B1 EP 3772467B1
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EP
European Patent Office
Prior art keywords
labelling
test
labelling device
labelled
labels
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EP20189706.3A
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German (de)
English (en)
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EP3772467A1 (fr
Inventor
Fabrizio FAZZIOLI
Massimo Fortini
Stefano Villa
Alessandro RONCONI
Luca Federici
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GD SpA
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GD SpA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
    • B65C9/00—Details of labelling machines or apparatus
    • B65C9/40—Controls; Safety devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
    • B65C9/00—Details of labelling machines or apparatus
    • B65C9/40—Controls; Safety devices
    • B65C2009/402—Controls; Safety devices for detecting properties or defects of labels
    • B65C2009/407—Controls; Safety devices for detecting properties or defects of labels after labelling

Definitions

  • This invention relates to a method for applying labels on products of the tobacco industry and a related labelling apparatus.
  • this invention relates to a method and a related apparatus for applying labels on products such as blanks for making wrappers of smoking articles, on webs of material, on wrappers of smoking articles, on partially ready packets or on packets of the tobacco industry.
  • This invention is advantageously applied for making a smoking article such as a cigarette packet containing a group of cigarettes, in which the group of cigarettes is wrapped in a folded blank which forms a smoking article wrapper, which is, in turn, further contained in a rigid outer container, in such a way as to make a packet of smoking articles having two rigid packages, one inside the other.
  • the blank which may for example be made of rigid material and be equipped with an extraction opening, is intended to be folded to make the wrapper, which has a removal opening, defined by the extraction opening of the blank.
  • the method and the apparatus according to this invention may advantageously be used, for example, for applying a label on the extraction opening of the blank, before this is folded, and the following description will explicitly refer to this but without thereby limiting the scope of the invention.
  • the method and the apparatus according to this invention may also advantageously be used for applying labels to other components of the tobacco industry such as webs of material, partially ready packets or completed packets, without difficulty.
  • Patent US8123030B2 shows a cigarette packet comprising a group of cigarettes, wrapped in a rigid inner wrapper, having a removal opening through which the cigarettes can be taken out, and a rigid outer container, which contains the wrapper and is provided with a hinged lid; coupled to wrapper is a label, which is glued by means of glue and repositionable on the wrapper for closing the removal opening.
  • the wrapper is made by folding a blank having an extraction opening, intended to form the removal opening of the wrapper, and applying a label on the extraction opening.
  • the blank has a longitudinal main axis of extension.
  • the Applicant shows in application EP3489156 a packer machine which comprises a labelling apparatus, suitable for applying to each blank a corresponding label or tab at the extraction opening and a method for applying labels according to the preamble of claim 1.
  • the labelling apparatus comprises a labelling unit, for applying labels to respective blanks, and a conveying unit, which is configured to feed a series of blanks along a feed path through the labelling unit.
  • the blanks are fed by the conveying unit with the longitudinal axis perpendicular to the feed path.
  • the labelling apparatus also comprises an optical inspection device, positioned downstream of the labelling unit for optically checking each labelled blank, at least at the label, in such a way as to be able to reject blanks labelled in a non-conforming way.
  • the terms "blanks labelled in a non-conforming way” means blanks in which the label is missing, or faulty (that is to say, with abnormal folds), or incorrectly positioned (that is to say, the label is not in the desired position or has an abnormal orientation), that is to say, labelled blanks which are different from a reference labelled blank, in which the label is applied in a reference position.
  • the conveying unit comprises a first labelling wheel and a second labelling wheel between which a transfer wheel is interposed.
  • the first labelling wheel receives the blanks for transferring them to the transfer wheel.
  • the transfer wheel receives them and in turn transfers them to the second labelling wheel.
  • the labelling unit comprises a first labelling device and a second labelling device, which are configured to apply labels on the blanks, wherein the first labelling device is positioned for applying the labels to the blanks at the first labelling wheel and the second labelling device is positioned for applying the labels to the blanks at the second labelling wheel.
  • the labels are typically glued to a backing web and supplied in the form of a reel to the labelling device, which feeds the backing web and the series of labels glued to it as far as a detaching zone where each label detaches from the backing web and is fed without backing in a direction of detachment so that it can be applied to a respective blank.
  • the direction of detachment of the labels is parallel to the direction of feed of each blank and is superposed on it.
  • At least one of the two labellers applies labels to the blanks.
  • the two labelling devices may be made to operate alternately, in such a way that one of the two labelling devices, considered to be the main one, applies labels, and the other, considered to be the secondary one, is paused, or they may be made to operate simultaneously, synchronising the application of labels to different blanks.
  • a technical intervention to substitute a reel is necessary when the reel of the labelling device which is applying labels is ending and must be substituted with a new reel.
  • the labelling device requiring the technical intervention is selected as the secondary labelling device in such a way that the other labelling device, selected as the main labelling device, applies labels to the blanks.
  • the presence to two labellers allows a technical intervention, manual or automatic, on the labelling device which is not applying labels, which may be cleaning, adjustment, or substitution of the reel which has ended with another, new reel.
  • the labelling device is ready to be able to change its role.
  • the labelling device which is activated for applying labels requires a temporary adjusting period, since a large number of labels applied may not be in the reference position compared with a reference blank.
  • the labels applied on the extraction opening may be moved longitudinally, or transversally relative to the longitudinal axis of the blank.
  • the depositing direction, in which the labels are fed without backing from the detaching zone may not be the same as a reference depositing direction, for example if the backing web on which the series of labels is glued is moved transversally in the detaching zone, or if the series of labels itself is moved transversally towards one of the two edges of the backing web, or even if between labels in the series there is a longitudinal distance different from a reference longitudinal distance.
  • the labels are moved, transversally or longitudinally, in the detaching zone, their affixing to the respective products results in products which are labelled in a non-conforming way, that is to say, labelled products which are different from a reference labelled product, in which the label is applied in a reference position.
  • An example of automatic adjustment of a labelling device for packages is, for example, show in document US4615757 , in which the packages are fed along a conveying path and the labelling device is movable horizontally above the conveying path relative to the size of the packages themselves. Consequently, production efficiency may be greatly reduced, for the whole duration of the condition of adjusting the labelling device.
  • DE102008050249 discloses a label inspection device in which the inspection device can be checked for correct functioning using test containers having corresponding labels, in order to evaluate, by means of said test containers, whether said inspection device is properly adjusted. During the test procedure or during the test program, the labelling machine is switched off, at least with regard to its labelling function.
  • DE102017010642 discloses a method for applying labels to blanks, wherein it is automatically determined whether the carrier tape, a label still on the carrier tape or a label already applied to a product deviates from a desired position and in the event that such a deviation is detected, the carrier web or the products are automatically moved perpendicular to the label peeling direction in such a way that the deviation is counteracted.
  • DE102015000032 discloses a pack for making cigarettes comprised two subgroups continuously transported along a path of a labeling unit by a labeling conveyor, wherein above the labeling conveyor there are two labelers which alternately transfer labels to the upper side of the transported subgroups and wherein only one of the labelers is in the active working position and the other, second labeler is kept ready as a spare unit in the waiting position such as the "inactive" labeller can be serviced in the meantime.
  • EP1803565 discloses a printing group on a running rotary printing press, wherein a printing cylinder of a second printing unit comprises a printing block for printing registration marks and wherein this printing block is slightly raised compared to the regular printing form of the printing cylinder, so that a regular printing form, i.e. the actual surface of the printing cylinder, does not come into contact with the printing material.
  • the register marks are detected and used to adjust the register of the second printing unit.
  • WO2011012927 discloses a registration system for labels in a labelling machine without the need to print a reference mark on the label strip as in a conventional system comprising a first stage of processing in order to identify a reference region in a label, and then a second stage of processing for identifying the position of a processing region of the labels in a label film corresponding to the said reference region.
  • the aim of this invention is to provide a labelling method and a related labelling apparatus which are free of the disadvantages described above and which, at the same time, are simple and inexpensive to make.
  • Another aim of this invention is to provide a method for labelling products of the tobacco industry in which there is a labelling unit provided with a pair of labelling devices which allows production efficiency to be increased when a labelling device which applies labels to the products, and which was previously paused for a reel change, or for which a tendency towards a drift in the position of the labels applied is in progress, generates a large number of products labelled in a non-conforming way.
  • a further aim of this invention is to provide a method for labelling products, which allows a reduction in the number of products rejected in a simple and inexpensive way.
  • the numeral 1 denotes a labelling apparatus for applying labels 4 on products of the tobacco industry.
  • the products may be blanks for making wrappers of smoking articles, webs of wrapping material, wrappers of smoking articles, partially ready packets or packets of the tobacco industry.
  • the labelling apparatus of Figure 1 is in particular configured to apply labels 4 on blanks 2, in such a way as to make wrappers 3 of smoking articles as shown in Figure 2 . It should be noticed that the label 4 is omitted in Figure 2 .
  • Each wrapper 3 is obtained by folding a respective blank 2, shown in Figure 3 , which is, for example, rigid (being constituted of cardboard or stiff paperboard) and has an extraction opening 201.
  • the wrapper 3 comprises a front wall 301, two side walls 302 which are folded at 90° relative to the front wall 301, a rear wall 303 which is folded at 90° relative to the side walls 302 and is parallel to the front wall 301, a top wall 304 which is perpendicular to the walls 301, 302, 303, and a bottom wall 305 which is parallel to and opposite the top wall 304, and is perpendicular to the walls 301, 302, 303.
  • the wrapper 3 may advantageously be used in making a rigid cigarette packet (not illustrated) in which a group of cigarettes (not illustrated) is wrapped in the wrapper 3, which is in turn received in an outer container (not illustrated) which has an open top end and is supplied with a cup-shaped lid hinged to the outer container so that it rotates between an open position, in which a user can access the wrapper 3, and a closed position.
  • the wrapper 3 has a removal opening 306, which is positioned centrally and affects a portion of the front wall 301 and a portion of the top wall 304.
  • the removal opening 306 is made by making in the relative blank 2 a through cut having a closed shaped which delimits inside it a disposable portion which is eliminated so as to leave a hole which constitutes the extraction opening 201.
  • the removal opening 306 of the wrapper 3 is normally closed by a reusable label 4 which is fixed to the wrapper 3 by means of the repositionable glue which is positioned around the removal opening 306 to allow the label 4 to be partly separated from the wrapper 3 multiple times, each time the wrapper 3 is opened, for accessing the contents of the wrapper 3, and then fixed to the wrapper 3 again, each time the wrapper is closed.
  • the repositionable glue is a glue which does not dry after it has been applied and therefore allows the label 4 to be repeatedly separated from and stuck to the underlying wrapper 3 again.
  • the wrapper 3 is obtained by folding the blank 2.
  • the blank 2 has a main longitudinal axis A of extension and comprises two longitudinal fold lines 202 and a plurality of transversal fold lines 203 which define, between the two longitudinal fold lines 202, a panel 301' which constitutes the upper part of the front wall 301, a panel 304' which constitutes the top wall 304, a panel 303' which constitutes the rear wall 303, a panel 305' which constitutes the bottom wall 305 of the wrapper 3, and a panel 301" which constitutes the lower part of the front wall 301 of the wrapper 3.
  • the panel 301' is partly superposed on the panel 301 " to constitute the front wall 301 of the wrapper 3 and there is a superposing band in which a lower portion of the panel 301' is resting over an upper portion of the panel 301 ".
  • the blank 2 comprises a pair of flaps 302', which are positioned on opposite sides of the panel 301', are connected to the panel 301' along the two longitudinal fold lines 202, and constitute part of the side walls 302.
  • the blank 2 comprises a pair of flaps 302′′′, which are positioned on opposite sides of the panel 303', are connected to the panel 303' along the two longitudinal fold lines 202, constitute part of the side walls 302, and are superposed on the corresponding flaps 302' to constitute part of the side walls 302 themselves.
  • the blank 2 comprises a pair of flaps 302", which are positioned on opposite sides of the panel 301 ", are connected to the panel 301" along the two longitudinal fold lines 202, constitute part of the side walls 302, and are superposed on the corresponding flaps 302′′′ to constitute part of the side walls 302 of the wrapper 3.
  • the blank 2 comprises a pair of first flaps 204, which are positioned on opposite sides of the panel 304', are connected to the panel 304' along the two longitudinal fold lines 202, and are folded at 90° relative to the panel 304' so that they are resting on the flaps 302'".
  • the blank 2 additionally comprises a pair of second flaps 205, which are positioned on opposite sides of the panel 305', are connected to the corresponding flaps 302'" along a transversal fold line 203, and are folded at 90° relative to the corresponding flaps 301′′′ so that they are resting on the panel 305'.
  • the wrapper 3 may be free of glue inside and it may be glued only to the outer container of the cigarette packet by means of adhesive material 210, positioned at the panel 303' of the blank 2, that is to say, the rear wall 303 of the wrapper 3, at the panel 305', that is to say, at the bottom wall 305, and at the panel 301 ", that is to say, at the lower part of the front wall 301 of the wrapper 3.
  • the various panels of which the wrapper 3 is made up may be not just superposed but also glued to each other for insertion in different types of cigarette packets.
  • the blank 2 is delimited by a pair of longitudinal edges 206 and 207, parallel to the longitudinal fold lines 202, and by a pair of transversal edges 208 and 209, wherein the transversal edge 208 is parallel to the transversal fold lines 203 and delimits the panel 301' whilst the edge 209 is shaped because it delimits the superposing band of the panel 301".
  • the longitudinal edge 206 may be called the upper edge whilst the longitudinal edge 207 may be called the lower edge.
  • the relative label 4 is applied to each blank 2.
  • a labelled blank 2 that is to say, a blank having the respective label 4
  • the label 4 is considered applied in a conforming way if considering a lower corner 401 of the label 4, for example the right-hand lower corner applied in the panel 301', the corner is placed at a first predetermined distance D1 from the lower edge 207 and is placed at a second predetermined distance D2 from the transversal edge 208, subject to a respective predetermined permitted first tolerance given for the distance D1 and a respective predetermined second tolerance given for the distance D2.
  • the first distance D1 and to the second distance D2 although there is a more precisely identifiable first range of validity associated with D1 and a second range of validity associated with D2.
  • the label 4 is considered applied in a non-conforming way as illustrated in Figure 5 and in Figure 6 .
  • Figure 5 shows the lower corner 401 of the label 4 placed at the first distance D', which is different from the predetermined first distance D1.
  • Figure 6 shows the lower corner 401 placed at the second distance D", which is different from the predetermined second distance D2.
  • the label 4 is considered applied in a conforming way using assessment criteria different from the first distance D1 and the second distance D2, it should be noticed that they are subject to the same considerations which are valid for the apparatus 1 and the method described below.
  • the labelling apparatus 1 comprises a labelling unit 5, configured to apply labels 4 to the relative products.
  • the apparatus 1 is configured to apply to each blank 2 a relative label 4, for closing the extraction opening 201.
  • the labelling apparatus 1 comprises a conveying unit 6, which is configured to feed a series of products, for example the blanks 2, along a feed path P, shown in Figure 3 , through the labelling unit 5.
  • the labelling unit 5 comprises a first labelling device 501 and a second labelling device 502, which are positioned along the feed path P, which are configured to apply the labels 4.
  • the products that is to say, the blanks 2, are fed in the feed path P in such a way that they have the respective longitudinal axes A transversal to the feed path P itself.
  • the conveying unit 6 is a single feed wheel 601 which is rotatably mounted with a horizontal axis of rotation and is provided with a plurality of suction seats (not illustrated) suitable for retaining by suction each blank 2 through the labelling unit 5.
  • the feed path P is defined in the feed wheel 601, between a receiving station 602 for the blanks 2 without closing labels 4, and a delivery station 603 for the labelled blanks.
  • the conveying unit 6 may be a plurality of labelling wheels (not illustrated) or a linear conveyor (not illustrated), comprising a conveying branch and a return branch, with regard to the product to be conveyed through the labelling unit 5.
  • the conveying unit is a linear conveyor.
  • the labelling apparatus 1 comprises a check unit (not illustrated), which comprises an optical inspection device 7, positioned downstream of the labelling unit 5 along the path P, for optically checking each labelled product at least at the label 4, and for identifying any labelled products in which the label 4 is applied in a non-conforming way compared with a reference labelled product.
  • a check unit (not illustrated), which comprises an optical inspection device 7, positioned downstream of the labelling unit 5 along the path P, for optically checking each labelled product at least at the label 4, and for identifying any labelled products in which the label 4 is applied in a non-conforming way compared with a reference labelled product.
  • optical inspection device 7 is configured to acquire an image of the labelled product and to process it, comparing it with the reference labelled product so as to identify products which are labelled in a non-conforming way as illustrated below.
  • the check unit comprises an actuating device (not illustrated) for operating at least one of the two labelling devices 501, 502, that is to say, the first labelling device 501 or the second labelling device 502, for applying the labels 4.
  • the first labelling device 501 and the second labelling device 502 can be controlled individually by the check unit of the actuating device.
  • the two labelling devices 501, 502 may operate alternately, that is to say, one of the two, considered the main labelling device, may be controlled so that it applies labels 4, whilst the other, considered the secondary labelling device, may be paused.
  • the two labelling devices 501, 502 may operate simultaneously but at reduced speed, synchronising the application of labels 4 to different products.
  • the first labelling device 501 and the second labelling device 502 are similar in structure and operation and are configured to feed to the blanks 2, or more generally to the products, the labels 4, which are supplied glued equally spaced from each other on respective backing webs 504' and 504", which are wound in respective reels 503' and 503".
  • the first labelling device 501 and the second labelling device 502 each comprise a respective detaching zone, beyond which each label 4 detaches from the respective backing web 504' and 504" and is fed without backing in a respective direction of detachment (not illustrated).
  • each labelling device 501, or 502 comprises a depositing fin 505', 505", having a wedge-shaped cross-section, around which the label 4 backing web is wrapped.
  • Each depositing fin 505', 505" is shaped in such a way that at its end it imposes a sudden change of direction on the backing web 504' and 504", in order to cause the labels 4 to detach, one at a time, from the respective backing web 504' and 504".
  • Each depositing fin 505', 505" defines the respective detaching zone of the first labelling device 501 and of the second labelling device 502.
  • the backing web 504' and 504", without labels 4 is then wound in a respective recovery reel 506' and 506".
  • each label 4 is fed in the respective direction of detachment from the detaching zone 505', 505", after detaching from the respective backing web 504' and 504".
  • Each label 4 is fed to the respective blank 2 parallel to the feed path P, that is to say, transversally to the longitudinal axis A of each blank 2.
  • the direction of detachment of the labels 4 from each labelling device 501, or 502 is parallel to the feed path P.
  • the actuating device is configured to select one of the two labelling devices 501 or 502, of the labelling unit 5 as the main labelling device, for applying the labels to respective products, in particular to the blanks 2, and the other labelling device 502, or 501, as the secondary labelling device.
  • the actuating device is additionally configured to control the secondary labelling device so that it applies at least one test label to a test product, for example to a test blank, in order to obtain a labelled test product, in particular a labelled blank 2, and to adjust the secondary labelling device if the test label optically checked in the labelled test product is applied in a non-conforming way.
  • the actuating device is configured to control the main labelling device so that it applies labels 4 to respective products, during adjustment of the secondary labelling device.
  • the actuating device can correct the application of the test labels by the secondary labelling device whilst the main labelling device can continue to apply labels 4 to the products as if it were in a labelling unit 5 production condition.
  • test label applied to a “test product” means a label 4 applied by the secondary labelling device, when the latter is in the adjusting condition, on a product, for example on a blank 2, fed by the conveying unit 6, which is considered as a test product for testing a correct application of the label 4 on it.
  • the conveying unit 6 is a single labelling wheel, which conveys blanks 2, and that the first labelling device 501 and the second labelling device 502 are positioned one after the other along the feed wheel 601.
  • the actuating device is configured to pause the main labelling device before application of the test label by the secondary labelling device.
  • the actuating device ensures that a single test label is applied to the test product, for example the test blank, and also follows conveying of the labelled test product as far as the optical inspection device 7, to optically check the labelled test product and assess any adjustments of the secondary labelling device.
  • the actuating device is configured to activate the main labelling device in such a way that it applies labels 4 to respective products.
  • the optical inspection device 7 is configured to acquire an image of the labelled test product and to process it, comparing it with the reference labelled product.
  • the check unit comprises a processing device (not illustrated) for comparing a position of the test label in the labelled test product, detected by the optical inspection device 7, with the reference position and for controlling a movement of the secondary labelling device based on said comparison.
  • the reference position may be compared by considering the predetermined first distance D1 from the lower edge 207 and the predetermined second distance D2 from the transversal edge 208.
  • the actuating device is configured to adjust the secondary labelling device and to control the application of a plurality of further test labels, consequently adjusting the secondary labelling device, until a test label applied in a conforming way is detected.
  • the labelling apparatus comprises a rejection device (not illustrated) suitable for rejecting a product labelled in a non-conforming way, whether this is a product labelled with the label 4 by the main labelling device or a test product, labelled with a test label by the secondary labelling device.
  • a rejection device (not illustrated) suitable for rejecting a product labelled in a non-conforming way, whether this is a product labelled with the label 4 by the main labelling device or a test product, labelled with a test label by the secondary labelling device.
  • the rejection device is placed in the conveying unit 6 at a rejection station (not illustrated).
  • the processing device (not illustrated) is additionally configured to track the labelled blank 2 which has been optically checked by the optical inspection device 7 during feed in the feed path P, in such a way that the actuating device can operate the rejection device when the blank 2 labelled in a non-conforming way is at the rejection station.
  • the rejection station is positioned upstream of the delivery station 603, that is to say, rejection of the blanks labelled in a non-conforming way occurs as they are fed in the feed path P.
  • labelled test blanks that is to say, on which test labels have been affixed by the secondary labelling device, are alternated with labelled blanks, in which the labels 4 have been applied by the main labelling device.
  • a method for applying labels 4 on products of the tobacco industry, for example on rigid blanks 2 having an extraction opening 201 which are intended for making wrappers 3 of smoking articles, by folding the blank 2.
  • the method comprises the following steps:
  • the method comprises the step of pausing the main labelling device 501, or 502, before application of the test label by the secondary labelling device 502, or 501.
  • the method also comprises the step of activating the main labelling device 501, or 502 for applying labels to respective products, after application of the test label and during the step of adjusting the secondary labelling device 502, or 501.
  • the step of applying the test labels by the secondary labelling device 502, or 501 takes place when the main labelling device 501, or 502, is temporarily paused, as it is activated only after application of the test label, when the secondary labelling device 502, or 501 is adjusted.
  • the step of adjusting the secondary labelling device 502, or 501 may comprise the step of moving the secondary labelling device transversally relative to the direction of detachment of the labels 4, that is to say, transversally relative to the feed path P.
  • the step of adjusting the secondary labelling device comprises the step of pausing the secondary device.
  • the secondary labelling device 502, or 501 is paused and is not in the operating condition of applying labels to the blanks, adjusting of the secondary labelling device 502, or 501 can take place precisely and in the necessary time and even if that adjusting is slow, there is no impact during the labelling machine productive step.
  • the whole secondary labelling device may be moved transversally manually, by an operator, or automatically, if a movement actuator is provided.
  • the method comprises the step of conveying the blanks 2 to be labelled, having a main longitudinal axis A of extension, along the feed path P in such a way that the axis A is transversal to the feed path P.
  • the step of applying labels 4 comprises applying labels 4 at the extraction opening 201 of the blank 2.
  • the labelled blanks 2 are conveyed as far as the delivery station 603 and the optical check of each labelled blank is performed upstream of the delivery station 603, that is to say, when the labelled blank is still conveyed by the conveying unit 6, that is to say is still in the feed wheel 601 which constitutes the conveying unit 6.
  • adjustment of the secondary labelling device may comprise the step of bringing forward, or delaying, application of a test label for correcting application of the test labels parallel to the direction of detachment, that is to say, parallel to the feed path P.
  • the product is the blank 2, bringing forward, or delaying, application of a test label on the respective extraction opening 201 of a test blank, corrects application of the labels 4 transversally relative to the longitudinal axis A of the blanks 2.
  • the labelling method also comprises the further step of comparing a position of the test label in the labelled test product with a reference position in the reference labelled product, in such a way as to calculate an application error on which to base adjustment of the secondary labelling device.
  • the method may also comprise the step of applying a plurality of test labels in a plurality of further products in order to obtain labelled test products; comparing the positions of the further test labels in the respective labelled test products with respective reference positions in such a way as to calculate an average application error based on the plurality of test labels applied.
  • the adjustment of the secondary labelling device may be based on the average application error.
  • the secondary labelling device is adjusted only at the end of a test label application interval and in this way variations over time in application of the test labels can be considered.
  • the step of moving the secondary labelling device transversally relative to the direction of detachment, that is to say, transversally relative to the feed path P may be based on the application error, or on the average application error.
  • the labelling method according to this invention additionally comprises the step of repeating multiple times the step of adjusting the secondary labelling device.
  • the labelling method comprises again pausing the main labelling device, controlling the secondary labelling device in such a way that it again applies a test label to a respective test blank, again adjusting the secondary labelling device, if the test label detected in the labelled test blank is again applied in a non-conforming way.
  • the main labelling device is again made to operate.
  • the step of adjusting the secondary labelling device may be repeated multiple times.
  • the method comprises the step of evaluating the secondary labelling device as faulty, if the adjusting step is performed a number of times which exceeds a predefined maximum number.
  • the faultiness of the secondary labelling device may therefore be translated into a request for intervention intended for a machine operator.
  • the production efficiency of the labelling apparatus is not reduced, despite adjustment of the secondary labelling device.
  • the method comprises the step of ending the condition of adjusting the labelling unit 5.
  • the secondary labelling device may be selected to apply labels to the products, that is to say, it may be selected as the main labelling device after the end of the adjusting condition, during a subsequent step of adjusting the labelling unit 5.
  • the labelling method also comprising the step of rejecting the products labelled in a non-conforming way, which have been optically checked and for which the label is applied in a non-conforming way compared with a reference labelled product, since each product is tracked as it is fed in the path P of the conveying unit 6.
  • the production efficiency of the labelling apparatus itself is increased in a simple and inexpensive way.
  • the method according to this invention comprises the step of activating the condition of adjusting the labelling unit 5 when a reel change is expected, since the reel of the labelling device which is applying labels to the products is ending.
  • the first labelling device 501 which is applying labels to the products
  • the first labelling device 501 is selected as the main labelling device and continues applying labels to the products whilst the second labelling device 502, in which the reel has been loaded and is still new, is selected as the secondary labelling device.
  • the secondary labelling device is adjusted while the main labelling device continues applying labels to the products and therefore the secondary labelling device applies at least one test label to a product, obtaining a labelled test product.
  • the secondary labelling device that is to say, the second labelling device 502 is adjusted if the test label optically checked in the labelled test product is applied in a non-conforming way.
  • the second labelling device 502 is ready to start applying labels to respective products. Therefore, the reel change procedure can be activated, and the second labelling device 502 will start applying labels to respective products whilst the first labelling device 501 is paused for substitution of the reel which ended. Since it has already been adjusted, the second labelling device 502 does not require any further adjustment.
  • the method according to this invention may comprise the step of activating the condition of adjusting the labelling unit 5 even if there is a high frequency of products labelled in a non-conforming way, that is to say, when the quality of application of the labels to the products falls over time since the number of labelled products rejected increases over time.
  • the first labelling device 501 which is applying labels to the products and the number of rejects is increasing over time
  • the first labelling device 501 is selected as the secondary labelling device whilst the second labelling device 502 is selected as the main labelling device.
  • the secondary labelling device that is to say, the first labelling device 501, is adjusted while the main labelling device continues applying labels to the products, that is to say, the secondary labelling device is activated in such a way that it applies at least one test label to a product, obtaining a labelled test product.
  • the secondary labelling device In order to assess a drift over time in the quality of application of labels by the secondary labelling device, multiple test labels are applied to as many products, obtaining respective labelled test products and calculating the average application error.
  • the secondary labelling device that is to say, the first labelling device 501, is adjusted using the average application error.
  • the first labelling device 501 is again ready to start applying labels to respective products.
  • the method according to this invention may be applied to multiple different products and to labelling apparatuses configured in a different way and is capable of increasing the production efficiency of the apparatus itself and of the automatic machine in which the apparatus is inserted.

Claims (15)

  1. Procédé pour appliquer des étiquettes (4) sur des produits de l'industrie du tabac, et, c'est-à-dire sur des ébauches (2) pour la fabrication d'emballages (3) d'articles à fumer, sur des bandes de matériau d'emballage, sur des emballages (3) d'articles à fumer, sur des paquets partiellement prêts ou sur des paquets de l'industrie du tabac, le procédé comprenant les étapes suivantes :
    - transporter les produits (2) à étiqueter le long d'un parcours d'alimentation (P) à travers une unité d'étiquetage (5) ;
    - fournir un premier dispositif d'étiquetage (501) et un deuxième dispositif d'étiquetage (502) de l'unité d'étiquetage (5) qui sont positionnés le long du parcours (P) ;
    - appliquer à chaque produit (2) une étiquette (4) relative au moyen d'au moins un des deux dispositifs d'étiquetage (501 ; 502) ;
    - contrôler optiquement chaque produit (2) étiqueté au moins en correspondance de l'étiquette (4) et identifier tous les produits (2) étiquetés sur lesquels l'étiquette (4) est appliquée de manière non conforme par rapport à un produit (2) étiqueté de référence ; dans lequel dans une condition de réglage de l'unité d'étiquetage (5), le procédé comprend les étapes suivantes :
    - sélectionner l'un des deux dispositifs d'étiquetage (501 ; 502) en tant que dispositif d'étiquetage principal pour appliquer les étiquettes (4) aux produits (2) respectifs et sélectionner l'autre dispositif d'étiquetage (502 ; 501) en tant que dispositif d'étiquetage secondaire ;
    - appliquer au moins une étiquette de test sur un produit au moyen du dispositif d'étiquetage secondaire, afin d'obtenir un produit de test étiqueté ;
    - régler le dispositif d'étiquetage secondaire si l'étiquette de test contrôlée optiquement dans le produit de test étiqueté est appliquée de manière non conforme ;
    caractérisé en ce que le procédé comporte également les étapes de :
    - effectuer ladite étape de réglage du dispositif d'étiquetage secondaire pendant l'application des étiquettes au moyen du dispositif d'étiquetage principal ;
    - mettre temporairement en pause le dispositif d'étiquetage principal avant l'application de l'étiquette de test par le dispositif d'étiquetage secondaire, et
    - activer le dispositif d'étiquetage principal pour appliquer les étiquettes (4) sur des produits respectifs, après l'application de l'étiquette de test et pendant l'étape de réglage du dispositif d'étiquetage secondaire.
  2. Procédé selon l'une des revendications précédentes, dans lequel l'étape de réglage du dispositif d'étiquetage secondaire comprend l'étape consistant à déplacer le dispositif d'étiquetage secondaire transversalement par rapport à une direction de détachement de l'étiquette (4) à partir d'une zone de détachement (505' ; 505") respective.
  3. Procédé selon la revendication 2, dans lequel le produit est une ébauche (2) rigide comportant une ouverture d'extraction (201) et le procédé comprend l'étape consistant à transporter les ébauches (2) à étiqueter, ayant un axe longitudinal principal (A) d'extension, le long du parcours d'alimentation (P) de telle sorte que l'axe (A) soit transversal au parcours d'alimentation (P) ; dans lequel l'étape d'application des étiquettes (4) comprend l'application des étiquettes (4) en correspondance de l'ouverture d'extraction (201) et dans lequel l'étape de déplacement du dispositif d'étiquetage secondaire comprend l'étape de correction de l'application d'une étiquette de test à une ébauche de test longitudinalement par rapport à l'axe (A) de l'ébauche (2).
  4. Procédé selon les revendications 2 ou 3, et comprenant l'étape consistant à mettre en pause le dispositif secondaire, après l'application de l'étiquette de test, avant de déplacer le dispositif d'étiquetage secondaire transversalement.
  5. Procédé selon l'une des revendications précédentes, dans lequel l'étape de réglage du dispositif d'étiquetage secondaire comprend de plus l'étape consistant à avancer ou à retarder l'application d'une étiquette de test pour corriger l'application des étiquettes de test parallèlement à une direction de détachement de l'étiquette (4) à partir d'une zone de détachement (505' ; 505") respective.
  6. Procédé selon la revendication 5, dans lequel le produit est une ébauche (2) rigide comportant une ouverture d'extraction (201) et le procédé comprend l'étape consistant à transporter les ébauches (2) à étiqueter, ayant un axe longitudinal principal (A) d'extension, le long du parcours d'alimentation (P) de telle sorte que l'axe (A) soit transversal au parcours d'alimentation (P) ; et dans lequel l'étape d'application des étiquettes (4) comprend l'application des étiquettes (4) en correspondance de l'ouverture d'extraction (201) et l'étape consistant à avancer ou à retarder l'application d'une étiquette de test sur une ébauche de test comprend l'étape consistant à corriger l'application de l'étiquette de test transversalement par rapport à l'axe (A) de l'ébauche (2).
  7. Procédé selon l'une des revendications précédentes, dans lequel l'étape consistant à identifier tout produit de test étiqueté sur lequel l'étiquette de test est appliquée de manière non conforme comprend l'étape consistant à comparer une position de l'étiquette de test dans le produit de test étiqueté avec une position de référence dans le produit étiqueté de référence, de manière à calculer une erreur d'application ; ladite étape consistant à régler le dispositif d'étiquetage secondaire étant basée sur ladite erreur d'application.
  8. Procédé selon l'une des revendications 1 à 6, et comprenant l'étape consistant à appliquer une pluralité d'étiquettes de test dans une pluralité de produits respectifs afin d'obtenir des produits de test étiquetés, en comparant les positions des étiquettes de test supplémentaires dans les produits de test étiquetés respectifs avec les positions de référence respectives dans le produit étiqueté de référence, de manière à calculer une erreur d'application moyenne sur la base de la pluralité d'étiquettes de test appliquées ; ladite étape consistant à régler le dispositif d'étiquetage secondaire étant basée sur ladite erreur d'application moyenne.
  9. Procédé selon les revendications 7 ou 8, lorsque celles-ci sont rattachées à l'une des revendications 4 à 6, dans lequel ladite étape de réglage consiste à déplacer le dispositif d'étiquetage secondaire transversalement sur la base de l'erreur d'application ou de l'erreur d'application moyenne.
  10. Procédé selon les revendications 7 ou 8, lorsque celles-ci sont rattachées aux revendications 5 ou 6, dans lequel ladite étape de réglage consiste à faire avancer ou à retarder l'application des étiquettes de test sur la base de l'erreur d'application ou de l'erreur d'application moyenne.
  11. Procédé selon l'une des revendications précédentes, et comprenant l'étape consistant à répéter plusieurs fois l'étape de réglage du dispositif d'étiquetage secondaire et à évaluer le dispositif d'étiquetage secondaire comme étant défectueux si ladite étape de réglage est exécutée un nombre de fois supérieur à un nombre maximal prédéfini.
  12. Procédé selon l'une ou plusieurs des revendications précédentes, et comprenant l'étape consistant à mettre fin à la condition de réglage de l'unité d'étiquetage (5) si l'étiquette de test contrôlée optiquement dans le produit de test étiqueté est appliquée de manière conforme ; le dispositif d'étiquetage secondaire pouvant être sélectionné comme dispositif d'étiquetage principal à la fin de la condition de réglage.
  13. Procédé selon l'une ou plusieurs des revendications précédentes, comprenant également l'étape consistant à rejeter les produits, ou les produits de test, étiquetés de manière non conforme.
  14. Procédé selon l'une ou plusieurs des revendications précédentes, et comprenant l'étape consistant à activer la condition de réglage de l'unité d'étiquetage (5) lorsqu'un changement de bobine est prévu, en sélectionnant comme dispositif d'étiquetage principal le dispositif d'étiquetage qui applique les étiquettes aux produits et dans lequel la bobine se termine, et comme dispositif d'étiquetage secondaire l'autre dispositif d'étiquetage dans lequel la bobine est encore neuve ; ou lorsqu'il y a une fréquence élevée de produits étiquetés de manière non conforme, en sélectionnant comme dispositif d'étiquetage secondaire le dispositif d'étiquetage qui applique les étiquettes aux produits de manière non conforme et comme dispositif d'étiquetage principal l'autre dispositif d'étiquetage.
  15. Appareil (1) pour appliquer des étiquettes (4) sur des produits de l'industrie du tabac, et, c'est-à-dire sur des ébauches (2) pour la fabrication d'emballages (3) d'articles à fumer, sur des bandes de matériau d'emballage, sur des emballages (3) d'articles à fumer, sur des paquets partiellement prêts ou sur des paquets de l'industrie du tabac, l'appareil comprenant :
    - une unité d'étiquetage (5), configurée pour appliquer des étiquettes (4) sur les produits (2) ;
    - une unité de transport (6), configurée pour alimenter une série de produits (2) le long d'un parcours d'alimentation (P), à travers l'unité d'étiquetage (5) ; dans lequel l'unité d'étiquetage (5) comprend un premier dispositif d'étiquetage (501) et un deuxième dispositif d'étiquetage (502), qui sont positionnés le long du parcours d'alimentation (P), configurés pour appliquer lesdites étiquettes (4) ; dans lequel l'appareil (1) comprend de plus :
    - une unité de contrôle, comprenant : un dispositif d'inspection optique (7), positionné en aval de l'unité d'étiquetage (5) pour contrôler optiquement chaque produit (2) étiqueté , au moins en correspondance de l'étiquette (4) et pour identifier tous les produits (2) étiquetés sur lesquels l'étiquette (4) est appliquée de manière non conforme par rapport à un produit (2) étiqueté de référence ;
    - un dispositif d'actionnement, configuré pour faire fonctionner les deux dispositifs d'étiquetage (501 ; 502) pour appliquer lesdites étiquettes (4) ; dans lequel, dans une condition de réglage de ladite unité d'étiquetage (5), le dispositif d'actionnement est configuré pour sélectionner l'un des deux dispositifs d'étiquetage (501 ; 502) en tant que dispositif d'étiquetage principal pour appliquer les étiquettes aux produits (2) respectifs et l'autre dispositif d'étiquetage (502 ; 501) comme dispositif d'étiquetage secondaire et est également configuré pour commander le dispositif d'étiquetage secondaire de manière à ce qu'il applique au moins une étiquette de test à un produit de test pour obtenir un produit de test étiqueté, en réglant le dispositif d'étiquetage secondaire si l'étiquette de test contrôlée optiquement dans le produit de test étiqueté est appliquée de manière non conforme ; et pour commander le dispositif d'étiquetage principal de manière à ce qu'il soit temporairement mis en pause avant l'application de l'étiquette de test par le dispositif d'étiquetage secondaire ; et qu'il soit activé pour appliquer des étiquettes (4) aux produits respectifs, après l'application de l'étiquette de test et pendant le réglage du dispositif d'étiquetage secondaire.
EP20189706.3A 2019-08-09 2020-08-05 Procede et appareil pour appliquer des etiquettes sur des produits de tabac Active EP3772467B1 (fr)

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IT102019000014478A IT201900014478A1 (it) 2019-08-09 2019-08-09 Metodo per applicare etichette a prodotti dell’industria del tabacco e relativo apparato di etichettatura

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CN115303594A (zh) * 2022-07-25 2022-11-08 苏州利华科技股份有限公司 一种便于夹持防偏移的pcb板自动贴标装置

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WO2011012927A1 (fr) * 2009-07-29 2011-02-03 Sidel S.P.A. Système d’enregistrement sans marque pour étiquettes dans des machines d’étiquetage
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PL3772467T3 (pl) 2024-02-19
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