EP1380509B1 - Procédé pour le centrage d' images sur une enveloppe d'un emballage contenant des produits - Google Patents

Procédé pour le centrage d' images sur une enveloppe d'un emballage contenant des produits Download PDF

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Publication number
EP1380509B1
EP1380509B1 EP03425454A EP03425454A EP1380509B1 EP 1380509 B1 EP1380509 B1 EP 1380509B1 EP 03425454 A EP03425454 A EP 03425454A EP 03425454 A EP03425454 A EP 03425454A EP 1380509 B1 EP1380509 B1 EP 1380509B1
Authority
EP
European Patent Office
Prior art keywords
print
wrapper
pusher part
relative
items
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.)
Expired - Lifetime
Application number
EP03425454A
Other languages
German (de)
English (en)
Other versions
EP1380509A1 (fr
Inventor
Tiziano Gasperini
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.)
Tissue Machinery Co SpA
Original Assignee
Tissue Machinery Co 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 Tissue Machinery Co SpA filed Critical Tissue Machinery Co SpA
Publication of EP1380509A1 publication Critical patent/EP1380509A1/fr
Application granted granted Critical
Publication of EP1380509B1 publication Critical patent/EP1380509B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B65B57/00—Automatic control, checking, warning, or safety devices
    • B65B57/10—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged
    • B65B57/12—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged and operating to control, or stop, the feed of wrapping materials, containers, or packages
    • 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
    • B65B41/00—Supplying or feeding container-forming sheets or wrapping material
    • B65B41/18—Registering sheets, blanks, or webs

Definitions

  • the present invention relates to a method for centring the print on one face of the wrapper of packs of items.
  • the need is known for putting printed information on the pack wrapper, for example marketing or advertising information.
  • the bundles of items are normally packaged in a wrapper made using a sheet of material such as cellophane.
  • the sheet of cellophane is taken from a web which is unwound from a reel, folded into the shape of a tube and sealed longitudinally.
  • the tube obtained in this way is sealed transversally to form a sort of bag designed to receive the bundle of items to be packaged.
  • the wrapper is then closed by sealing and cutting the sheet of cellophane at the back of the items packaged, at the same time forming the base of the wrapper for the subsequent pack.
  • the print is applied to the cellophane web, at suitable intervals, so that it is located on a predetermined face of the wrapper produced.
  • the print may be in any position considered suitable, except, obviously, in the wrapper sealing zone. Often, for example, the print is present on one side of the pack so that it is visible when the packs are arranged on a pallet or stored using other methods.
  • the print applied to the cellophane web may have an error which is reproduced on the pack or the error, for example print which is shifted so that it is early or late relative to the condition initially required, may occur during the packaging steps.
  • the aim of the present invention is to overcome the above-mentioned disadvantage by providing a method which allows the automatic centring of the print on a predetermined face of the wrapper of packs of items.
  • Another aim of the present invention is to provide a method which allows the real time correction of any errors.
  • Yet another aim of the present invention is to provide a method which allows the above-mentioned print centring by means of an operating structure which has a simple design with reliable and versatile operation.
  • the numeral 1 denotes as a whole a machine for packaging items 2 in bundles inside a wrapper 3 produced using a sheet of material such as cellophane.
  • the sheet of cellophane is obtained form a web 30 which is unwound from a reel 31 and engages with a set of tensioning rollers 13.
  • the cellophane web 30 has a set of printed information.
  • Said print includes a reference section (mark) designed to be detected by suitable sensor means 10, for example of the photocell type, located downstream of the reel 31.
  • suitable sensor means 10 for example of the photocell type, located downstream of the reel 31.
  • the signal detected by the sensor means 10 is sent to electronic control means 11.
  • the cellophane web 30 is fed to a folder part 4 with a shaped opening 41 designed to fold the web 30 (see in particular Figure 2) into the shape of a tube.
  • the folder part 4 constitutes a tubular guide 40 with a transversal profile substantially corresponding to the dimensions of the items 2 to be packaged.
  • Longitudinal sealing means 42 are attached to the folder part 4. The sealing means are designed to seal the tube shaped cellophane web 30 closed.
  • the longitudinal seal line of the tube shaped folded web 30 is normally positioned at the centre line of the pack.
  • the items 2 are fed to a lift part 5 which transfers them to a raised position coplanar with the base of the tubular guide 40 of the folder part 4.
  • a pusher part 6, driven by an actuator 60, on a horizontal axis, is designed to move the items 2 in a direction longitudinal to the folder part 4.
  • This movement of the pusher part 6 is controlled, as is better explained below, by detector means 7.
  • the detector means 7 are connected to the electronic control means 11, which suitably control the pusher part 6 actuator 60.
  • the detector means 7 are designed to compare the movement of the pusher part 6 with the machine cycle degrees.
  • transversal sealing means 8 designed to transversally seal the cellophane web 30 folded into the shape of a tube.
  • Cutting means 9 are attached to the sealing means 8 and simultaneously cut the web 30 along a cutting line in the middle of two adjacent seal lines.
  • the method disclosed for centring print on the wrapper 3 of packs of items 2 involves an initial calibration step, with which reference parameters are saved on the control means 11, as explained below.
  • the first operation in the calibration step consists of predetermining the correct centring of a first print in a first wrapper at the wrapping station formed by the folder means 4, which are designed to fold the cellophane web 30 into a tube shape, and by the longitudinal sealing means 42.
  • a manual jog control is used to operate the machine to feed a first bundle of items 2 to the lift part 5, against a panel 15.
  • the lift part 5 moves to its raised position, in which the first bundle 2 is coplanar with the base of the tubular guide 40 of the folder part 4.
  • the cellophane web 30 folded into a tube shape was previously stretched, for example manually, at the shaped opening 41.
  • the tube obtained in this way is sealed transversally by the sealers 8 to form a sort of bag designed to receive the above-mentioned bundle of items 2 to be packaged.
  • the web 30 is fed into the tubular guide 40 until a first print applied to the web 30 is in the desired position, relative to the dimensions of the bundle of items to be packaged. Said print position is upstream of the sealers 8.
  • the first bundle of items 2 transferred to the raised position is then moved longitudinally, by the pusher part 6, into the first partially formed wrapper 3 in the wrapping station consisting of the folder means 4.
  • the forward movement of the pusher part 6 moves the first bundle of items 2 until it is close to the transversal seal which forms the base of the wrapper.
  • the machine parts open the sealers 8 in a suitably synchronised fashion.
  • the detector means 7 acquire the parameters relative to the position of the pusher part 6 (first characteristic position P; see Figure 3A), as well as the corresponding machine cycle degrees.
  • the data is recorded in the control means 11 which, at this point, create a triple link in the memory between the pusher 6 first characteristic position P, the machine cycle degrees and simultaneous detection of the reference section, which correspond to print centring in the wrapper.
  • the second operation in the initial calibration step involves moving the pusher part 6 further forward, again with the jog control, until it reaches the ideal end of stroke point, corresponding to the reference line "Ao" in Figure 4.
  • the sealers 8 move towards one another, closing the first wrapper 3 produced in this way, separated from the tubular web by the simultaneous action of the cutting means 9, and at the same time closing the base of the wrapper designed to receive the next bundle of items 2 (see Figure 1).
  • the pack produced rests on a table 14 at the folder part 4 outfeed, downstream of the sealers 8.
  • the normal automatic cycle for packaging the items 2 can then be started, during which the method disclosed is designed to check the position of the print in each wrapper as they are produced and to intervene with suitable corrections if positioning errors are encountered.
  • the bundles of items 2 to be packaged are transferred from the lift part 5 in the raised position and pushed by the pusher part 6 into the tube shaped cellophane web at the wrapping station.
  • the bundle of items 2 to be packaged drags the cellophane web 30 which is wrapped around it.
  • the pusher part 6 stroke continues until the first position (characteristic P) is reached ( Figure 3A). If the detector means 7 detect the first characteristic position P correctly, it must coincide with the reading of a reference section by the sensor 10. In such cases, the control means 11, verifying a match, issue the actuator 60 command so that the pusher part 6 completes its stroke to the point previously set (reference line "Ao", Figure 4).
  • the deviation of the print position relative to the predetermined position P is detected when the sensor 10 detects the reference section early or late (lines 0+ and 0- in Figure 3) relative to the position in which the pusher part reaches the first characteristic position P.
  • the deviation value is combined with the relative machine cycle degrees, so as to check if it lies within a predetermined "range" in which a correction can be made with a single corrective movement.
  • Said correction is made in real time, intervening to restore the correct position starting with the next pack.
  • Said correction may be applied gradually over several successive packs, so as to avoid unwanted effects on the tension of the wrapper.
  • the photocell sensor 10 is simultaneously adjusted one way or the other (arrow F) to align it with a reference section of a print, after the one centred on the wrapper.
  • the method disclosed achieves the aim of automatically maintaining print centring on a predetermined face of the wrapper of items to be packaged in bundles, within a predetermined tolerance "range".
  • One advantage of the invention is the fact that the above-mentioned print centring, according to the method disclosed, is performed by an operating structure with a simple design and reliable, versatile operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)

Claims (6)

  1. Un procédé pour le centrage de l'impression sur l'enveloppe d'emballages d'articles (2), ladite enveloppe (3) étant obtenue à partir d'une bande (30) déroulée depuis une bobine (31), présentant des impressions équidistantes, chacune marquée par une section de référence correspondante, et enveloppée, en une forme tubulaire fermée, dans une station d'enveloppement d'une machine d'emballage, l'extrémité avant étant scellée transversalement de manière à ce que l'extrémité opposée puisse recevoir un emballage d'articles (2), et étant finalement scellée en amont de l'emballage en question pour former l'enveloppe, le procédé comprenant une phase initiale d'étalonnage, durant laquelle le centrage approprié d'une première impression est prédéterminé sur une première enveloppe (3) contenant un premier emballage d'articles (2) et les données de référence correspondantes sont acquises et enregistrées dans des moyens de contrôle électroniques (11), et un cycle successif de fonctionnement normal de la machine, durant lequel les données relatives à chaque enveloppe en formation sont comparées avec les données de référence susmentionnées pour vérifier si le centrage de l'impression est correct et, si le positionnement de l'impression n'est pas correct par rapport aux données enregistrées, une action corrective est mise en oeuvre, via les moyens de contrôle (11), par les organes opérationnels de la machine ; ledit procédé étant caractérisé en ce que la phase initiale du cycle d'étalonnage prévoit :
    - le positionnement de la bande (30) au niveau de la station d'enveloppement de manière à ce que la bande elle-même forme une sorte de sac dans lequel l'impression est dans une position prédéterminée par rapport à la première enveloppe à produire ;
    - l'introduction, par l'intermédiaire d'un organe pousseur (6), d'un premier emballage d'articles dans le sac ;
    - la détection d'une première position caractéristique de l'organe pousseur (6) et des degrés correspondants du cycle machine, fonctionnellement définie par la détection de la section de référence de l'impression après la détection correspondant à l'impression de la première enveloppe ;
    - la détection de la position de référence de fin de course (Ao) de l'organe pousseur (6) avec les degrés correspondants du cycle machine.
  2. Le procédé selon la revendication 1, caractérisé en ce que la première position caractéristique (P) est obtenue en utilisant l'organe pousseur (6) pour déplacer le premier emballage jusqu'à le rapprocher du fond du sac, en faisant ensuite avancer ce dernier, et la bande (30) associée, jusqu'à ce que la section de référence soit détectée, définissant par conséquent un triple lien entre la position du pousseur, les degrés du cycle machine et la détection de la section de référence.
  3. Le procédé selon la revendication 1, caractérisé en ce que la première position caractéristique (P*) est obtenue en utilisant l'organe pousseur pour déplacer l'emballage jusqu'à le rapprocher du fond du sac, en arrêtant la course de l'organe pousseur, et en réglant la position des organes capteurs destinés à détecter la section de référence jusqu'à ce que cette dernière section soit détectée.
  4. Le procédé selon la revendication 1, caractérisé en ce que les opérations suivantes ont lieu durant le cycle de fonctionnement normal de la machine :
    - vérification de la position appropriée de chaque impression par rapport à l'enveloppe (3), en contrôlant la correspondance entre le moment où l'organe pousseur (6) atteint la première position caractéristique (P, P*) et la détection de la section de référence par les moyens capteurs (10) ;
    - activation, par l'intermédiaire des moyens de contrôle électroniques (11), de l'organe pousseur (6) de manière à ce qu'il atteigne la position prédéterminée de fin de course (Ao), quand la vérification précédente a donné un résultat positif ;
    - définition d'une ou de plusieurs actions correctives à mettre en oeuvre, en changeant la position de fin de course de l'organe pousseur (6), si la vérification précédente a détecté un écart de l'impression par rapport à l'enveloppe (3), de manière à ce qu'à l'issue desdites actions, l'impression de l'enveloppe (3) suivante soit dans la position prédéterminée ou présente une différence par rapport à cette dernière position qui est inférieure à l'écart détecté.
  5. Le procédé selon la revendication 4, caractérisé en ce que l'organe pousseur (6), durant les actions correctives, est activé par les moyens de contrôle (11) de manière à ce qu'il atteigne une position de fin de course (A+) située au-delà de la position de référence (Ao), suite à une détection retardée d'une section de référence d'une des impressions par les moyens capteurs (10).
  6. Le procédé selon la revendication 4, caractérisé en ce que l'organe pousseur (6) est activé par les moyens de contrôle (11) de manière à ce qu'il atteigne une position de fin de course (A-), située avant la position de référence (Ao), suite à une détection anticipée d'une section de référence d'une des impressions par les moyens capteurs (10).
EP03425454A 2002-07-12 2003-07-10 Procédé pour le centrage d' images sur une enveloppe d'un emballage contenant des produits Expired - Lifetime EP1380509B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2002BO000448A ITBO20020448A1 (it) 2002-07-12 2002-07-12 Metodo per la centratura della stampa sull'involucro di confezioni diarticoli
ITBO20020448 2002-07-12

Publications (2)

Publication Number Publication Date
EP1380509A1 EP1380509A1 (fr) 2004-01-14
EP1380509B1 true EP1380509B1 (fr) 2006-03-22

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ID=11440293

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03425454A Expired - Lifetime EP1380509B1 (fr) 2002-07-12 2003-07-10 Procédé pour le centrage d' images sur une enveloppe d'un emballage contenant des produits

Country Status (4)

Country Link
EP (1) EP1380509B1 (fr)
DE (1) DE60304156T2 (fr)
ES (1) ES2260597T3 (fr)
IT (1) ITBO20020448A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB903693A (en) * 1959-11-27 1962-08-15 Globe Roofing Products Co Inc Wrapping machine
US4860522A (en) * 1988-06-20 1989-08-29 Hayssen Manufacturing Company Form, fill and seal registration system apparatus and method including variable length compensation and out of registration restoration
JP2801530B2 (ja) * 1994-08-17 1998-09-21 株式会社フジキカイ 横型製袋充填包装機及びその制御方法
JP4096112B2 (ja) * 1995-09-11 2008-06-04 四国化工機株式会社 ウェッブの位置合せ装置

Also Published As

Publication number Publication date
EP1380509A1 (fr) 2004-01-14
DE60304156T2 (de) 2006-12-14
ITBO20020448A1 (it) 2004-01-12
ES2260597T3 (es) 2006-11-01
DE60304156D1 (de) 2006-05-11
ITBO20020448A0 (it) 2002-07-12

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