EP1055603A1 - Method and machine for wrapping a product in a sheet of heat-shrink wrapping material - Google Patents

Method and machine for wrapping a product in a sheet of heat-shrink wrapping material Download PDF

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Publication number
EP1055603A1
EP1055603A1 EP00111211A EP00111211A EP1055603A1 EP 1055603 A1 EP1055603 A1 EP 1055603A1 EP 00111211 A EP00111211 A EP 00111211A EP 00111211 A EP00111211 A EP 00111211A EP 1055603 A1 EP1055603 A1 EP 1055603A1
Authority
EP
European Patent Office
Prior art keywords
wrapping
product
heat
sheet
overwrapped
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Withdrawn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
EP00111211A
Other languages
German (de)
English (en)
French (fr)
Inventor
Fiorenzo Draghetti
Saverio Martini
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.)
GD SpA
Original Assignee
GD 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 GD SpA filed Critical GD SpA
Publication of EP1055603A1 publication Critical patent/EP1055603A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B19/00—Packaging rod-shaped or tubular articles susceptible to damage by abrasion or pressure, e.g. cigarettes, cigars, macaroni, spaghetti, drinking straws or welding electrodes
    • B65B19/02—Packaging cigarettes
    • B65B19/22—Wrapping the cigarettes; Packaging the cigarettes in containers formed by folding wrapping material around formers
    • 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
    • B65B53/00—Shrinking wrappers, containers, or container covers during or after packaging
    • B65B53/02—Shrinking wrappers, containers, or container covers during or after packaging by heat

Definitions

  • the present invention relates to a method of wrapping a product in a sheet of heat-shrink wrapping material.
  • the present invention is particularly advantageous for use on machines for cellophaning packets of cigarettes, to which the following description refers purely by way of example.
  • Known machines for cellophaning packets of cigarettes normally comprise a first wrapping wheel, on which a sheet of heat-shrink wrapping material is folded about a packet of cigarettes to form a tubular wrapping, which is stabilized by means of a longitudinal seal and has two tubular end portions, each projecting from a respective end wall of the packet.
  • the packet and respective tubular wrapping are normally fed through a folding station where each projecting tubular portion of the tubular wrapping is folded onto the respective end wall to form a closed outer overwrapping, which, as it is conveyed, together with the respective packet, on a second wrapping wheel, is stabilized by two end seals.
  • the overwrapped packet is fed to an output station of the cellophaning machine, where it is normally heat treated to shrink the sheet of wrapping material about the packet.
  • the heat treatment normally comprises feeding the overwrapped packet along a tunnel maintained at a given temperature by a stream of hot air or by a beam of infrared radiation.
  • Heat-shrinking as described above involves several drawbacks, mainly due to the whole surface of the outer wrapping of each packet being exposed to a poorly controlled amount of heat, which shrinks the wrapping not only to the extent of deforming the packet and later making the wrapping difficult to remove, but also unequally from one point to another, thus resulting in the formation of wrinkles.
  • a method of wrapping a product in a sheet of heat-shrink wrapping material comprising the steps of wrapping the product in said sheet of wrapping material to form an overwrapped product having an outer wrapping comprising at least two opposite surfaces substantially parallel to each other; and feeding said overwrapped product through a heat-shrink station; and being characterized in that the overwrapped product, as it is fed through said heat-shrink station, travels with the two opposite surfaces of said outer wrapping directly contacting respective heated surfaces defining, in between, a channel for the passage of said overwrapped product through the heat-shrink station.
  • the overwrapped product is fed through said heat-shrink station by means of two heated endless conveyors facing each other, and each having a conveying portion contacting a respective one of said two opposite surfaces; each said conveying portion defining a respective said heated surface.
  • each said opposite surface is defined by a respective continuous, i.e. seamless, portion of the sheet of wrapping material.
  • the present invention also relates to a machine for wrapping a product in a sheet of heat-shrink wrapping material.
  • a machine for wrapping a product in a sheet of heat-shrink wrapping material comprising wrapping means for wrapping the product in said sheet of wrapping material and forming an overwrapped product having an outer wrapping comprising at least two opposite surfaces substantially parallel to each other; and a heat-shrink station; and being characterized by comprising two heated surfaces located at said heat-shrink station and defining, in between, a channel for the passage of said overwrapped product; each said heated surface coming into direct contact with a respective said opposite surface as said overwrapped product is fed through said heat-shrink station.
  • said two heated surfaces are so located as to engage respective continuous, i.e. seamless, portions of the sheet of wrapping material; each said continuous portion defining a respective one of said two opposite surfaces of the outer wrapping.
  • each said heated surface is defined by a conveying portion of a respective heated endless conveyor.
  • Number 1 in the accompanying drawing indicates as a whole a cellophaning machine for wrapping a packet 2 of cigarettes in a respective sheet 3 of transparent heat-shrink wrapping material.
  • Machine 1 comprises a frame 4; and a wrapping wheel 5 fitted to a powered shaft 6, which in turn is fitted to frame 4 to rotate in steps, with respect to frame 4 and in a given direction (anticlockwise in the drawing), about an axis 7 perpendicular to the plane of the accompanying drawing.
  • Wheel 5 is a known type, and comprises a number of pockets 8 equally spaced along the periphery of wheel 5, and which are substantially U-shaped and open both radially and axially outwards.
  • each pocket 8 When arrested at a loading station 9, each pocket 8 receives a respective sheet 3 of wrapping material fed to station 9 by a known feed device 10; and a respective packet 2, which is inserted, in known manner at station 9, inside respective pocket 8 so as to fold sheet 3 into a U about packet 2.
  • packet 2 is fed by wheel 5, and by successive conveying devices described later on, along a wrapping path P with the longitudinal axis 2a of the packet crosswise at all times to path P and to the plane of the accompanying drawing.
  • sheet 3 is folded about packet 2 (as of said U-shaped configuration) by a known movable folding device 12a and a known fixed folding device 12b, to form a tubular wrapping 13, which is stabilized by a longitudinal edge seal made by a known sealing device 14 during one of the stops of wheel 5, and comprises two tubular end portions 15, each projecting from a respective end wall 16 of packet 2.
  • Wheel 5 comprises, in known manner, two coaxial, parallel disks 17 (only one shown in the accompanying drawing) fitted to shaft 6, and each having a number of peripheral seats 18, each of which, together with a corresponding seat 18 on the other disk 17, defines a respective pocket 8.
  • Machine 1 also comprises an endless conveyor 19, in turn comprising a belt 20 looped about a number of pulleys 21 having respective axes 22 parallel to axis 7 of wheel 5.
  • Belt 20 comprises a number of push elements 23 equally spaced along belt 20 and defining a succession of pockets 24, each of a length at least equal to the width of a packet 2 measured parallel to path P.
  • pulleys 21 are powered to rotate continuously in a given direction (anticlockwise in the accompanying drawing) about respective axis 22.
  • pulley 21a may be powered to rotate in steps about axis 22.
  • conveyor 19 extends between disks 17 of wheel 5 to enable one of push elements 23 to extract a respective packet 2 and respective tubular wrapping 13 from a respective pocket 8, and feed the packet and tubular wrapping through a folding station 25 having a number of known folding devices 26 for each of the two tubular portions 15 of tubular wrapping 13.
  • Each number of folding devices 26 comprises two movable folding devices 26a, 26b for folding two walls, arranged crosswise to path P, of respective tubular portion 15 onto the relative end wall 16 of respective packet 2; and a fixed helical folding device 26c for folding two walls, arranged parallel to path P, of respective tubular portion 15 onto the relative end wall 16 of respective packet 2 to form an overwrapped packet 27.
  • overwrapped packet 27 therefore comprises a closed outer wrapping 28, which is stabilized by two end seals made as the overwrapped packet 27 travels along a portion of path P defined by the periphery of pulley 21a.
  • pulley 21a comprises, in known manner, a number of pairs of facing sealing devices 29 equally spaced about pulley 21a and movable with pulley 21a in time with pockets 24.
  • each outer wrapping 28 is therefore substantially parallelepiped-shaped with a rectangular section, and with two major lateral surfaces 30 parallel to each other and each defined by a respective continuous portion of sheet 3 of wrapping material, i.e. a portion unaffected by the stabilizing seals described above.
  • conveyor 19 feeds the overwrapped packet 27 "laid flat" - i.e. with surfaces 30 of outer wrapping 28 positioned horizontally and with axis 2a crosswise to path P - along a plate 31 and towards an output station 32 of machine 1.
  • machine 1 comprises a heat-shrink device 33 defining output station 32, and which provides for feeding the overwrapped packet 27 through output station 32 and simultaneously performing heat treatment to shrink sheet 3 of wrapping material about packet 2.
  • device 33 comprises two belt conveyors 34 arranged one over the other beneath path P, and each comprising a respective belt 35, which travels in contact with a respective plate 36 heated to a given temperature by electric resistors (not shown) embedded in plate 36 and controlled by a known temperature control device 37.
  • Each belt 35 is looped about a pair of pulleys 38 - one of which is powered - fitted to frame 4 to rotate about respective axes 39 parallel to axis 7.
  • Each belt 35 comprises a horizontal conveying portion 40 extending parallel to path P and facing the conveying portion 40 of the other belt 35 to define a channel 41, along which the overwrapped packet 27 is fed with surfaces 30 of outer wrapping 28 directly contacting conveying portions 40.
  • machine 1 Operation of machine 1 is easily deducible from the foregoing description with no further explanation required. It should, however, be stressed that, by heating sheet 3 of wrapping material by direct contact with conveying portions 40, a given precise amount of heat can be transmitted to sheet 3, by conduction and through surfaces 30, to achieve a predetermined amount of shrinkage of outer wrapping 28 about packet 2. Moreover, by heating sheet 3 by direct contact at continuous surfaces 30 only, i.e.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Basic Packing Technique (AREA)
  • Wrapping Of Specific Fragile Articles (AREA)
EP00111211A 1999-05-27 2000-05-24 Method and machine for wrapping a product in a sheet of heat-shrink wrapping material Withdrawn EP1055603A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO990294 1999-05-27
IT1999BO000294A IT1309272B1 (it) 1999-05-27 1999-05-27 Metodo e macchina per l'incarto di un prodotto in un foglio di incarto di materiale termoretraibile

Publications (1)

Publication Number Publication Date
EP1055603A1 true EP1055603A1 (en) 2000-11-29

Family

ID=11344023

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00111211A Withdrawn EP1055603A1 (en) 1999-05-27 2000-05-24 Method and machine for wrapping a product in a sheet of heat-shrink wrapping material

Country Status (2)

Country Link
EP (1) EP1055603A1 (it)
IT (1) IT1309272B1 (it)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1659064A1 (en) * 2004-11-19 2006-05-24 GDM S.p.A. A method and a unit for overwrapping products, and packets in particular
WO2007036262A1 (de) * 2005-09-27 2007-04-05 Focke & Co. (Gmbh & Co. Kg) Vorrichtung zur wärmebehandlung von packungen
WO2007068317A1 (de) * 2005-12-12 2007-06-21 Focke & Co. (Gmbh & Co. Kg) Vorrichtung zum herstellen von packungen mit schrumpffolie
WO2007134669A1 (de) * 2006-05-23 2007-11-29 Focke & Co. (Gmbh & Co. Kg) Verfahren und vorrichtung zum herstellen von zigarettenpackungen
EP1889785A1 (en) * 2006-08-17 2008-02-20 G.D Societ Per Azioni Method and unit for heat-shrinking overwrappings of heat-shrink plastic material of a succession of products
JP2008529910A (ja) * 2005-02-18 2008-08-07 フィリップ・モーリス・プロダクツ・ソシエテ・アノニム 容器を収縮包装するための機器及び方法
EP1964781A1 (en) * 2007-02-27 2008-09-03 G.D. S.p.A A machine for manufacturing and/or packing tobacco products
EP2509889A1 (de) 2009-12-09 2012-10-17 Focke & Co. (GmbH & Co. KG) Packungen insbesondere für zigaretten sowie verfahren und vorrichtung zum herstellen derselben

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2037631A (en) * 1932-06-08 1936-04-14 Pneumatic Scale Corp Method of wrapping an article
US4642969A (en) * 1985-03-27 1987-02-17 Johnson Charles H Method and apparatus for wrapping blocks of cheese
DE3718702A1 (de) * 1987-06-04 1988-12-22 Hoechst Ag Verfahren zur herstellung von verpackungseinheiten mit ueberlegenen optischen eigenschaften und verbessertem warmblockverhalten, verpackungseinheit hergestellt nach dem verfahren
EP0445705A1 (en) * 1990-03-07 1991-09-11 Syfan Method and apparatus for tightly wrapping an article with a synthetic film

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2037631A (en) * 1932-06-08 1936-04-14 Pneumatic Scale Corp Method of wrapping an article
US4642969A (en) * 1985-03-27 1987-02-17 Johnson Charles H Method and apparatus for wrapping blocks of cheese
DE3718702A1 (de) * 1987-06-04 1988-12-22 Hoechst Ag Verfahren zur herstellung von verpackungseinheiten mit ueberlegenen optischen eigenschaften und verbessertem warmblockverhalten, verpackungseinheit hergestellt nach dem verfahren
EP0445705A1 (en) * 1990-03-07 1991-09-11 Syfan Method and apparatus for tightly wrapping an article with a synthetic film

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7272917B2 (en) 2004-11-19 2007-09-25 G.D S.P.A. Method for overwrapping products and packets in particular
EP1659064A1 (en) * 2004-11-19 2006-05-24 GDM S.p.A. A method and a unit for overwrapping products, and packets in particular
JP2008529910A (ja) * 2005-02-18 2008-08-07 フィリップ・モーリス・プロダクツ・ソシエテ・アノニム 容器を収縮包装するための機器及び方法
WO2007036262A1 (de) * 2005-09-27 2007-04-05 Focke & Co. (Gmbh & Co. Kg) Vorrichtung zur wärmebehandlung von packungen
CN101272959B (zh) * 2005-09-27 2011-05-11 福克有限及两合公司 用于对包装盒进行热处理的装置
US7784253B2 (en) 2005-09-27 2010-08-31 Focke & Co. (Gmbh & Co. Kg) Apparatus for the heat treatment of packs
JP2009509872A (ja) * 2005-09-27 2009-03-12 フォッケ・ウント・コンパニー（ゲゼルシャフト・ミト・べシュレンクテル・ハフツング・ウント・コンパニー・コマンデイトゲゼルシャフト） パックを熱処理するための装置
JP2009518251A (ja) * 2005-12-12 2009-05-07 フォッケ・ウント・コンパニー（ゲゼルシャフト・ミト・べシュレンクテル・ハフツング・ウント・コンパニー・コマンデイトゲゼルシャフト） 収縮フィルムを有するパッケージを製造するための装置
WO2007068317A1 (de) * 2005-12-12 2007-06-21 Focke & Co. (Gmbh & Co. Kg) Vorrichtung zum herstellen von packungen mit schrumpffolie
US8621832B2 (en) 2005-12-12 2014-01-07 Focke & Co. (Gmbh & Co. Kg) Device for producing shrink film-covered packs
US7908825B2 (en) 2006-05-23 2011-03-22 Focke & Co. (Gmbh & Co. Kg) Method and device for producing cigarette packs
WO2007134669A1 (de) * 2006-05-23 2007-11-29 Focke & Co. (Gmbh & Co. Kg) Verfahren und vorrichtung zum herstellen von zigarettenpackungen
US7500338B2 (en) 2006-08-17 2009-03-10 G.D Societa' Per Azioni Method and unit for heat-shrinking overwrappings of heat-shrink plastic material of a succession of products
EP1889785A1 (en) * 2006-08-17 2008-02-20 G.D Societ Per Azioni Method and unit for heat-shrinking overwrappings of heat-shrink plastic material of a succession of products
EP1964781A1 (en) * 2007-02-27 2008-09-03 G.D. S.p.A A machine for manufacturing and/or packing tobacco products
EP2509889A1 (de) 2009-12-09 2012-10-17 Focke & Co. (GmbH & Co. KG) Packungen insbesondere für zigaretten sowie verfahren und vorrichtung zum herstellen derselben
US8826633B2 (en) 2009-12-09 2014-09-09 Focke & Co. (Gmbh & Co. Kg) Packs, in particular for cigarettes, and method and apparatus for producing said packs
US9788575B2 (en) 2009-12-09 2017-10-17 Focke & Co. (Gmbh & Co. Kg) Packs, in particular for cigarettes, and method and apparatus for producing said packs

Also Published As

Publication number Publication date
ITBO990294A0 (it) 1999-05-27
ITBO990294A1 (it) 2000-11-27
IT1309272B1 (it) 2002-01-16

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