EP0712782A1 - Dispositif pour envelopper des objets dans une bandelette de matériau d'emballage - Google Patents

Dispositif pour envelopper des objets dans une bandelette de matériau d'emballage Download PDF

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Publication number
EP0712782A1
EP0712782A1 EP95830478A EP95830478A EP0712782A1 EP 0712782 A1 EP0712782 A1 EP 0712782A1 EP 95830478 A EP95830478 A EP 95830478A EP 95830478 A EP95830478 A EP 95830478A EP 0712782 A1 EP0712782 A1 EP 0712782A1
Authority
EP
European Patent Office
Prior art keywords
articles
wrapping
conveying
conveying means
article
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Withdrawn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
EP95830478A
Other languages
German (de)
English (en)
Inventor
Giuseppe Ponti
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.)
CMC SRL
Original Assignee
CMC SRL
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 CMC SRL filed Critical CMC SRL
Publication of EP0712782A1 publication Critical patent/EP0712782A1/fr
Withdrawn legal-status Critical Current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
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/20—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for adding cards, coupons or other inserts to package contents
    • 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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • 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
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/06—Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it
    • B65B9/067—Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it the web advancing continuously

Definitions

  • the present invention relates to wrapping articles with a strip of wrapping material.
  • This protective sheet is generally made of thermoplastic transparent film, like polyethylene and similar.
  • This sheet permits also to package together with the magazine and the like an insert or inserts, usually enclosed therewith.
  • devices For wrapping the articles with a plastic film, devices are usually used which include pushers that regularly space apart the same articles.
  • the articles are directed to a wrapping station, and a continuous plastic film is fed thereto as well.
  • the film is folded over the articles by suitable guides. Subsequently, a longitudinal welding and a double transversal welding between the articles are made, and the film is cut between the transversal weldings, so as to obtain single packages.
  • the articles are wrapped with a strip of paper or the like.
  • An apparatus for wrapping books, magazines and the like, with paper is disclosed e.g. in the European Patent No. 0.480.882.
  • This apparatus features conveyors for the articles to be packaged and a spool that delivers paper in direction longitudinal to the articles movement direction; spraying means apply strips of suitable glue transversally to the sheet of paper, between the articles.
  • the strip of paper is folded around the articles and, simultaneously, other spraying means apply suitable glue on longitudinal edges of the sheet of paper; these longitudinal edges are put one on the other and pressed by suitable pressing means so as to be glued.
  • the articles are supplied to the wrapping line either directly at the outlet of the production line, or from a storage magazine, this last case being specifical to Companies working for a third party only to carry out the wrapping of the articles.
  • An object of the present invention is the provision of an apparatus that allows the articles to be wrapped with a strip of wrapping material without any need to stop the wrapping machine due to inconvenience caused by a lack of one or more articles, so that a continuous working is ensured for the overall wrapping line.
  • the articles 1 are to be wrapped with a strip of wrapping material, constituted by e.g. film of transparent plastic material.
  • the articles 1 are fed one by one by a belt conveyor 2 that is connected with the articles 1 production line.
  • the speed of the belt conveyor is detected by a sensor element 3 that includes an encoder.
  • the articles 1 are moved from the belt conveyor 2 to a wrapping line 4 that extends transversally to the same belt conveyor 2.
  • the wrapping line 4 includes a first belt conveyor 5, aimed at receiving the articles 1, and a second belt conveyor 6, designed to control the rhythmical movement of the articles 1.
  • the belt 6 is equipped with trailers 7 that, in known way, keep the articles 1 regularly space apart.
  • the belt conveyor 6 is operated by a motor 9 through a transmission 8.
  • the speed of the belt conveyor 6 is detected by a related encoder 10 mounted on the motor 9.
  • Sensor elements 11, e.g. photocells, aimed at detecting the actual presence of the articles 1 to be wrapped, are designed to cooperate with the belt conveyor 6.
  • the articles 1, moved rhythmically, regularly spaced apart, are transferred to another belt conveyor 12 that extends through a wrapping station 13 and that is operated by a motor 15 through a transmission 14.
  • the speed of the belt conveyor 12 is detected by a related encoder 16 connected with the motor 15. Also a dynamo 29 is connected to the axle of the motor 15.
  • the plastic film 17, fed continuously to the station 13, is folded, to take a tubular shape, by suitable guides, not shown, so as to wrap up the articles 1, and is then welded longitudinally in a known way (see fig. 2).
  • a double transversal welding between the articles is made on the plastic film 17 by a device 18 that subsequently cuts the film 17 between the transversal weldings.
  • the welding and cutting device 18 is controlled on the basis of the outputs of other sensors 19, aimed at detecting the position of the articles 1 being wrapped, downstream of the same device 18.
  • the device 18, that is a known one, includes a welding and cutting blade 20 that cooperates with a counter-blade 21.
  • the blade 20 is supported by a carriage 22 and is allowed a vertical sliding motion, while the counter-blade 21 is also supported by the carriage but in a stationary position.
  • the carriage 22 slides on a guide 23 in direction longitudinal to the line 4.
  • the blade 20 is operated with reciprocating movement by a mechanism 24 that includes a crank and a connecting rod, driven by a motor 25.
  • crank-rod mechanism 24 The working speed of the crank-rod mechanism 24 is detected by a related encoder 26 connected to the motor 25.
  • the crank-rod mechanism 24 also operates a crank and slotted link mechanism 27 having its lower part pivoted on a pin 28 and hinged to the carriage 22, so that the carriage is given a reciprocating horizontal motion.
  • crank and slotted link mechanism 27 allows to adjust the stroke of carriage 22 to fit the need.
  • crank-rod mechanism 24 and the crank and slotted link mechanism 27 provokes reciprocating movements of both the blade 20 and the carriage 22 that supports the same blade 20 and the counter-blade 21.
  • crank-rod mechanism 24 and crank and slotted link mechanism 27 are depicted with dashed lines 24a and 27a.
  • the welding and cutting device 18 is controlled on the basis of the outputs of the photocell 19 that detects the position of the articles 1 being wrapped on the belt conveyor 12.
  • the motor 25 operates the blade 20 and the carriage 22, which move in phase relation with each other (Fig. 3a).
  • the blade 20 joins the counter-blade 21, thus welding transversally the plastic film and then cutting it along the middle of the welding (Fig. 3b).
  • the motors 9, 15, and 25 are controlled by programmable processors 30, like known PLC, that receive and process signals issued by the encoders 3, 10, 16 and 26, and by the photocells 11 and 19.
  • the above mentioned motors 9, 15 and 25 are brushless motors and give a quick response. In normal working conditions, the articles 1 are fed from the belt conveyor 2 to the wrapping line 4 one by one.
  • the articles 1 are transferred to the belt conveyor 6 that is equipped with the trailers 7 that regularly space apart the articles 1.
  • the belt conveyor 6 moves forward in phase relation with the belt conveyor 2 that is operated continuously to feed the articles 1. At this point, inserts, postal labels and the like can be added.
  • the photocells 11 detect the presence of the articles 1 on the belt conveyor 6 and thereafter, the belt conveyor 12 brings the articles 1 to the wrapping station 13.
  • the photocell 19 checks the correct position of each article and operates the device 18 for transversal welding and cutting of the plastic film 17.
  • the photocells 11 detect lack of one article on the belt conveyor 6 of the wrapping line 4, due to a possible "empty" place on the line 2 or due to a reject on the belt conveyor 6 by known, not illustrated means, (in Fig. 4 the lacking article M is depicted with broken line), the movement speed of the wrapping belt 12 is suitably lowered, until the next article arrives, thus keeping constant the distances between the articles placed thereon (see Fig.4).
  • the wrapping belt 12 will be first slowed down and then, upon detection of the second lack, stopped completely.
  • the welding device 18 will be first slowed down and then stopped, while the motor 9 of the belt conveyor 6 will be kept on working in phase relation with the movement speed of the articles feeding belt 2 (Fig. 7).
  • Normal conditions restoration after one or more lacks, is activated automatically and controlled by the programmable processors 30 that control the motors 9, 15 and 25, on the basis of signals issued by the encoders 3, 10, 16 and 26 and the photocells 11 and 19, and processed thereafter.
  • the shaft of the belt conveyor 2 feeding the articles 1 is operated continuously and the encoder 3, connected therewith, supplies a reference parameter that is compared to the parameter issued by the encoder 10 of the belt conveyor 6, and the result is used to operate the conveyor 6 in a way to match the motion of the conveyor 2.
  • the wrapping belt 12 moves forward regularly, operated by the motor 15, only if the photocells 11 detect the presence of all the articles 1 on the belt conveyor 6.
  • the processors 30 determine the speed of the wrapping line that determines the distance between the articles 1.
  • speed of the belt conveyor 6 can be varied accordingly, by means of the signals issued by the encoders 3 and 10.
  • the motion speed of the blade 20 of the welding device 18 is determined by the motor 25 that is controlled on the basis of the signals issued by the encoders 16 and 26 and the dynamo 29.
  • the position of the blade 20 is instead determined in accordance with the position of the articles 1 on the wrapping belt 12, detected by the photocell 19.
  • the blade 20 always takes the intermediate position between an article and the following one, it welds and cuts a section that can be defined by digital control, and the cycle continues so that the blade returns to its starting position in phase for the next cycle.
  • the feeding belt conveyor 2 controls the belt conveyor 6, by operation of the encoders 3 and 10 and the processors 30.
  • the belt conveyor 6 controls the wrapping belt 12 that, in its turn, controls the translation of the blade 20 of the welding device 18.
  • the prefixed speed of the belt conveyor 6 remains unchanged, while the wrapping belt 12 and the welding and cutting device 18 are suitably slowed down, and accelerated again when the next article arrives.
  • the belt conveyor 12 and the device 18 slow down along the space occupied by one article and then they stop so as to start again when the next articles arrive.
  • means spraying suitable glue can be used instead of means for longitudinal and transversal welding.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Replacement Of Web Rolls (AREA)
  • Basic Packing Technique (AREA)
EP95830478A 1994-11-15 1995-11-15 Dispositif pour envelopper des objets dans une bandelette de matériau d'emballage Withdrawn EP0712782A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO940507A IT1274112B (it) 1994-11-15 1994-11-15 Apparecchiatura per l'avvolgimento di articoli con un foglio continuo
ITBO940507 1994-11-15

Publications (1)

Publication Number Publication Date
EP0712782A1 true EP0712782A1 (fr) 1996-05-22

Family

ID=11340111

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95830478A Withdrawn EP0712782A1 (fr) 1994-11-15 1995-11-15 Dispositif pour envelopper des objets dans une bandelette de matériau d'emballage

Country Status (2)

Country Link
EP (1) EP0712782A1 (fr)
IT (1) IT1274112B (fr)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5689942A (en) * 1996-06-25 1997-11-25 Ibaraki Seiki Machinery Company, Ltd. Drive motor controlling apparatus for use in packaging machine
US5870887A (en) * 1996-12-23 1999-02-16 Ishida Co., Ltd. Form-fill-seal packaging machine
NL1015613C2 (nl) * 2000-07-05 2002-01-08 Buhrs Zaandam Bv Samenstel voor het verpakken van een discontinu aangevoerde stroom producten.
EP1188670A1 (fr) * 2000-09-18 2002-03-20 Ferag AG Procédé et machine pour envelopper des produits imprimés dans un matériau d' emballage
EP1260436A1 (fr) * 2001-05-23 2002-11-27 SIG Pack Systems AG Dispositif et procédé pour alimenter des articles à une station d'ensachage
EP1350719A1 (fr) * 2002-04-03 2003-10-08 SITMA S.p.A. Dispositif d'étirement d'un film dans une machine automatique d'emballage de produits
EP1591364A1 (fr) 2004-04-27 2005-11-02 SITMA S.p.A. Procédé d'alimentation de produits de différentes hauteurs et longueurs vers un dispositif d'emballage
WO2005118400A1 (fr) * 2004-06-02 2005-12-15 Ferag Ag Procede et dispositif pour emballer des objets plats
WO2005118402A1 (fr) * 2004-06-02 2005-12-15 Ferag Ag Procede et dispositif d'emballage d'objets plats
WO2006003634A1 (fr) 2004-06-30 2006-01-12 Micromec S.R.L. Appareil et procede d'emballage sous film
WO2007147269A1 (fr) * 2006-06-21 2007-12-27 Ferag Ag Dispositif pour usiner des objets plats transportés en continu l'un derrière l'autre ou une bande de matériau presque sans fin
WO2008049480A1 (fr) 2006-10-23 2008-05-02 Iwk Verpackungstechnik Gmbh Procédé pour commander le transfert d'une pile de produits dans une machine d'emballage
EP2048085A1 (fr) 2007-10-02 2009-04-15 Ferag AG Dispositif et procédé d'emballage d'objets plats transportés dans un courant de refoulement
WO2009129888A1 (fr) * 2008-04-25 2009-10-29 Lts Lohmann Therapie-Systeme Ag Agencement de transfert et d'inspection d'emballages unitaires
ITRM20090140A1 (it) * 2009-03-24 2010-09-25 Kern Sistemi S R L Dispositivo per azionare un elemento operatore agente con moto alternativo su un flusso lineare a passo variabile di prodotti
US8544720B2 (en) 2009-11-25 2013-10-01 Bell And Howell, Llc Article of manufacture for usage as an integrated bidirectional mailpiece and method of manufacturing integrated bidirectional mailpieces
US9604493B2 (en) 2009-11-25 2017-03-28 Bell And Howell, Llc Method and system to manufacture an integrated return mailpiece on wrapping document processing system
WO2017093486A1 (fr) * 2015-12-02 2017-06-08 Swedish Match North Europe Ab Dispositif de scellement étanche
US9688439B2 (en) 2010-02-09 2017-06-27 Bell And Howell, Llc Mailpiece with personalized communication and return slip and related method utilizing wrapper system
CN116443362A (zh) * 2023-06-15 2023-07-18 山东明佳科技有限公司 桶装泡面产线料包检测控制方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0375857A1 (fr) * 1988-12-28 1990-07-04 Fuji Machinery Co., Ltd. Procédé et appareil d'emballage
EP0480882A2 (fr) 1990-10-10 1992-04-15 C.M.C. S.r.l. Machine pour envelopper des livres, des périodiques et similaires avec du papier
EP0640526A1 (fr) * 1993-08-31 1995-03-01 Klöckner Hänsel Tevopharm B.V. Procédé et dispositif pour manipuler un courant de produits

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0375857A1 (fr) * 1988-12-28 1990-07-04 Fuji Machinery Co., Ltd. Procédé et appareil d'emballage
EP0480882A2 (fr) 1990-10-10 1992-04-15 C.M.C. S.r.l. Machine pour envelopper des livres, des périodiques et similaires avec du papier
EP0640526A1 (fr) * 1993-08-31 1995-03-01 Klöckner Hänsel Tevopharm B.V. Procédé et dispositif pour manipuler un courant de produits

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2314826A (en) * 1996-06-25 1998-01-14 Ibaraki Seiki Mach Co Controlling drive motors in a packaging machine
GB2314826B (en) * 1996-06-25 2000-03-29 Ibaraki Seiki Mach Co Drive motor controlling apparatus for use in packaging machine
US5689942A (en) * 1996-06-25 1997-11-25 Ibaraki Seiki Machinery Company, Ltd. Drive motor controlling apparatus for use in packaging machine
US5870887A (en) * 1996-12-23 1999-02-16 Ishida Co., Ltd. Form-fill-seal packaging machine
US6658826B2 (en) 2000-07-05 2003-12-09 Buhrs-Zaandam B.V. Assembly for packaging a discontinuously supplied stream of products
NL1015613C2 (nl) * 2000-07-05 2002-01-08 Buhrs Zaandam Bv Samenstel voor het verpakken van een discontinu aangevoerde stroom producten.
EP1172296A1 (fr) * 2000-07-05 2002-01-16 Buhrs-Zaandam B.V. Assemblage pour emballer un courant d'articles alimenté de façon discontinue
EP1188670A1 (fr) * 2000-09-18 2002-03-20 Ferag AG Procédé et machine pour envelopper des produits imprimés dans un matériau d' emballage
US6789375B2 (en) 2000-09-18 2004-09-14 Ferag Ag Method and apparatus for covering printed products with a packaging material
EP1260436A1 (fr) * 2001-05-23 2002-11-27 SIG Pack Systems AG Dispositif et procédé pour alimenter des articles à une station d'ensachage
US6711880B2 (en) 2001-05-23 2004-03-30 Sig Pack Systems Ag Apparatus for, and method of, feeding piece goods to a tubular-bag packaging station
US6907715B2 (en) 2002-04-03 2005-06-21 Sitma S.P.A. Device for stretching a film in an automatic product packaging machine
EP1350719A1 (fr) * 2002-04-03 2003-10-08 SITMA S.p.A. Dispositif d'étirement d'un film dans une machine automatique d'emballage de produits
US7263815B2 (en) 2004-04-27 2007-09-04 Sitma S.P.A. Process for feeding products of variable height and length into a continuous packaging apparatus
EP1591364A1 (fr) 2004-04-27 2005-11-02 SITMA S.p.A. Procédé d'alimentation de produits de différentes hauteurs et longueurs vers un dispositif d'emballage
US7877965B2 (en) 2004-06-02 2011-02-01 Ferag Ag Method and device packaging flat objects
WO2005118402A1 (fr) * 2004-06-02 2005-12-15 Ferag Ag Procede et dispositif d'emballage d'objets plats
US7757461B2 (en) 2004-06-02 2010-07-20 Ferag Ag Method and device packaging flat objects
EP1914165A1 (fr) 2004-06-02 2008-04-23 Ferag AG Procédé et dispositif destinés à former une rangée d'objets plats
WO2005118400A1 (fr) * 2004-06-02 2005-12-15 Ferag Ag Procede et dispositif pour emballer des objets plats
AU2005249619B2 (en) * 2004-06-02 2010-11-18 Ferag Ag Method and device packaging flat objects
AU2005249622B2 (en) * 2004-06-02 2010-10-21 Ferag Ag Method and device for packaging flat articles
US7658053B2 (en) 2004-06-02 2010-02-09 Ferag Ag Method and device for packaging flat articles
WO2006003634A1 (fr) 2004-06-30 2006-01-12 Micromec S.R.L. Appareil et procede d'emballage sous film
WO2007147269A1 (fr) * 2006-06-21 2007-12-27 Ferag Ag Dispositif pour usiner des objets plats transportés en continu l'un derrière l'autre ou une bande de matériau presque sans fin
US8417369B2 (en) 2006-06-21 2013-04-09 Ferag Ag Device for machining continuously successively transported, flat objects or an almost endless web of material
EP2208680A1 (fr) 2006-06-21 2010-07-21 Ferag AG Dispositif de traitement d'objets plats alimentés en continu les uns derrière les autres ou d'une bande de matériau quasi-infinie
WO2008049480A1 (fr) 2006-10-23 2008-05-02 Iwk Verpackungstechnik Gmbh Procédé pour commander le transfert d'une pile de produits dans une machine d'emballage
US8056704B2 (en) 2006-10-23 2011-11-15 Iwk Verpackungstechnik Gmbh Method for controlling the transfer of a product stack in a packaging machine
EP2048085A1 (fr) 2007-10-02 2009-04-15 Ferag AG Dispositif et procédé d'emballage d'objets plats transportés dans un courant de refoulement
WO2009129888A1 (fr) * 2008-04-25 2009-10-29 Lts Lohmann Therapie-Systeme Ag Agencement de transfert et d'inspection d'emballages unitaires
WO2010109426A1 (fr) * 2009-03-24 2010-09-30 Kern Sistemi Srl Dispositif de commande d'un élément opérationnel se déplaçant en va-et-vient sur un flux de produits linéaire à pas variable
ITRM20090140A1 (it) * 2009-03-24 2010-09-25 Kern Sistemi S R L Dispositivo per azionare un elemento operatore agente con moto alternativo su un flusso lineare a passo variabile di prodotti
US8544720B2 (en) 2009-11-25 2013-10-01 Bell And Howell, Llc Article of manufacture for usage as an integrated bidirectional mailpiece and method of manufacturing integrated bidirectional mailpieces
US9604493B2 (en) 2009-11-25 2017-03-28 Bell And Howell, Llc Method and system to manufacture an integrated return mailpiece on wrapping document processing system
US9688439B2 (en) 2010-02-09 2017-06-27 Bell And Howell, Llc Mailpiece with personalized communication and return slip and related method utilizing wrapper system
WO2017093486A1 (fr) * 2015-12-02 2017-06-08 Swedish Match North Europe Ab Dispositif de scellement étanche
CN116443362A (zh) * 2023-06-15 2023-07-18 山东明佳科技有限公司 桶装泡面产线料包检测控制方法
CN116443362B (zh) * 2023-06-15 2023-08-18 山东明佳科技有限公司 桶装泡面产线料包检测控制方法

Also Published As

Publication number Publication date
ITBO940507A1 (it) 1996-05-15
IT1274112B (it) 1997-07-15
ITBO940507A0 (it) 1994-11-15

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