US20070186512A1 - Process and machine for packaging products with stretchable thermoplastic film - Google Patents

Process and machine for packaging products with stretchable thermoplastic film Download PDF

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Publication number
US20070186512A1
US20070186512A1 US11/568,518 US56851805A US2007186512A1 US 20070186512 A1 US20070186512 A1 US 20070186512A1 US 56851805 A US56851805 A US 56851805A US 2007186512 A1 US2007186512 A1 US 2007186512A1
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US
United States
Prior art keywords
film
tube
wrapping
packaging
jaw
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.)
Abandoned
Application number
US11/568,518
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English (en)
Inventor
Renato Rimondi
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.)
AWAX Progettazione e Ricerca SRL
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AWAX Progettazione e Ricerca 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 AWAX Progettazione e Ricerca SRL filed Critical AWAX Progettazione e Ricerca SRL
Assigned to A.W.A.X. PROGETTAZIONE E RICERCA S.R.I. reassignment A.W.A.X. PROGETTAZIONE E RICERCA S.R.I. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RIMONDI, RENATO
Publication of US20070186512A1 publication Critical patent/US20070186512A1/en
Abandoned 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
    • 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
    • B65B9/073—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 having intermittent motion
    • 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

Definitions

  • the invention relates to structural and functional improvements to the process and machine described in document WO 03/051715 A1 of the same applicant, to which the most extensive reference is made.
  • the process described in the above cited document provides for unwinding the stretchable film from a feed spool, inserting that film in a horizontal mandrel to form a welded leaktight wrapping tube with overlapping longitudinal edges, holding and sealing the forward end of the said tube with jaw means by making two welds and cutting in-between, inserting the product which is to be packed into the inlet opening of the said film-tube-forming mandrel and positioning it at the anterior closed extremity of that tubular packaging which is caused to advance horizontally as an extension of the said forming mandrel by the said anterior jaw and supporting means.
  • the tube wrapping is stopped and decelerated transversely by opposing clamps which clamp it for example at the discharge outlet from the forming mandrel complex, while the said anterior jaw means continue to advance the length of the progressively elongating tubular wrapping so as to stretch it longitudinally by a certain amount, this then shrinking by reaction transversely and adhering closely to the product located within it.
  • the posterior extremity of the stretched packaging is gripped transversely by a second clamping device which forms two transverse welds and a cut between them to seal and hold the rear end of the packaging with the product, while the anterior clamping, welding and cutting device opens, reverses the horizontal movement to return to the cycle start position and leaves the packed product supported on comb means associated with the lower component of the active jaw, welding and cutting device, which holds the end of the new length of tube of film at the outlet from the forming mandrel to repeat a new working cycle as described.
  • rollers is a rubber-coated roller and means which can stop it under control, for example drive means with a brake or an electromagnetic brake, are associated with it, and when this roller is stopped it forms an effective clamp which engages the film transversely and uniformly over its entire length.
  • the longitudinal stretching to which the length of film which has left the forming mandrel is cyclically subjected and within which the tray with the product is positioned uniformly discharges its own energy over the entire length of film between the stretching clamps and the said rubber-coated roller, so that the film itself is not subjected to any appreciable longitudinal displacements which would have an adverse effect on the longitudinal welding means.
  • FIG. 1 is a diagrammatical view in lateral elevation of the machine in question incorporating the improvements according to the invention
  • FIGS. 2, 3 , 4 , 5 and 6 show diagrams illustrating the different modes of operation of the said film feed motor in relation to the horizontal translational and sealing movement of the one of the two drawing jaws which is cyclically activated.
  • the machine comprises a forming mandrel 1 , of the so-called sling type, which is fixed or possibly adjustable, located in an almost horizontal position, formed by angled parts supported on supports 101 and through which there passes longitudinally a tubular guide 1 ′ supported by external parts 14 which has for example a rectangular cross-section and is such that product P being packed, which is normally intended to be placed in a tray, can pass through it with sufficient play, this being delivered in indian file by a subjacent feed line 2 of which at least the terminal part is in the form of a comb and acts together with a lifter 3 of matching shape which on command raises the product in line with the end wall of guide 1 ′, whereupon a thruster 4 which discharges the product from the lifter and inserts it into guide 1 ′operates at the appropriate time, using the working logic described above.
  • 30 indicates known means which determine the dimensions of the product and transmit this information to machine processor 13 , which also detects the rate of advance of conveyor 2 , all so that
  • Stretchable thermoplastic film 5 for wrapping the product reaches and is returned from the same extremity of mandrel 1 at which the product enters, being delivered from a spool 105 which is in a sufficiently convenient location for replacement when it is empty, for example above the packaging track, supported on a pair of parallel rollers 6 , one of which idles while the other is driven by a drive unit 7 which unwinds the film from that spool.
  • the film unwound from the spool is delivered to a buffer device which includes a set of rollers 108 which are mounted so as to idle on an appendage of supporting structure 9 which also supports said rollers 6 and comprises a set of rollers 8 mounted on a swinging arm 10 pivoted on said structure 9 at 11 and which has a transducer 12 on the pivot which detects the angular position of the swinging arm and converts it into an electrical signal which is used by process unit 13 to control motor 7 so that there is always a sufficient quantity of film in the buffer device to render the film wrapping stage independent of spool 105 from which the film is fed to tube-forming mandrel 1 through the action of a pair of rollers 15 , 115 rotatably mounted on an appendage 109 of said structure 9 located above mandrel 1 , at an appropriate distance therefrom and for example approximately on the vertical of the discharge opening from that mandrel.
  • First roller 115 idles and is pressed by resilient means 16 towards the other roller 15 which is preferably rubber coated and positioned in relation to the upstream roller and mandrel 1 in such a way that it comes into contact with a suitable contact surface area of film, this roller being positively connected to a motor 17 under electronic speed and phase control, for example a stepping, brushless or other suitable type of motor controlled by processor 13 .
  • Suitable means which are not illustrated, are provided so that roller 115 can be temporarily moved away from roller 15 so that the film can be inserted between them at the start of work.
  • Film 5 runs along mandrel 1 longitudinally in the same direction of advance as product P and through that mandrel is shaped in such a way as to form a tube which envelops tube guide 1 ′, while the edges of the film overlap, for example at the bottom of mandrel 1 , where a device 18 of any type, for example a jet of hot air, which welds the said edges together longitudinally with at least one longitudinal weld which is preferably continuous and leak-tight, is in operation.
  • a device 18 of any type for example a jet of hot air, which welds the said edges together longitudinally with at least one longitudinal weld which is preferably continuous and leak-tight, is in operation.
  • the anterior extremity of tube of film 5 leaving mandrel 1 is welded transversely and is held alternately by jaws 19 , 119 which clamp it, form two welds and cut between them, comprising two matching and mutually overlapping parts connected to means diagrammatically indicated by arrows 20 , 120 and 21 , 121 controlled by processor 13 , which on command moves them closer together and further apart with a self-centering movement which causes them to move horizontally away from and towards mandrel 1 .
  • the lower components of jaws 19 , 119 have attached to them on the side opposite that facing mandrel 1 a corresponding projecting plane 22 , 122 in the form of a comb.
  • a motor-driven conveyor 23 formed by parallel and horizontal belts, at least in its initial part, through which the tines of planes 22 , 122 of jaws 19 , 119 can be inserted without interference, are provided at a suitable distance in line with and downstream from mandrel 1 .
  • Bars 24 , 124 which deliver hot air at the appropriate temperature to the wrapping film leaving the mandrel are located immediately downstream from mandrel 1 .
  • These components which have already been described in the patent cited in the foreword, together with welding device 18 and other components which subject the film or packaging to heat treatment, are also controlled by processor 13 .
  • Processor 13 adjusts the cycle described to the dimensions of product P being packed, in particular its length, which is detected through aforesaid means 30 and 2 .
  • A indicates the lateral movement of the anterior stretching jaw
  • B the rotational movement of film-feeding unit 15 , 115 , 17 and C indicates the sealing movement of the posterior jaw.
  • These movements are inactive in the zero position and are instead active in the top position indicated by 1 in the ordinates.
  • lateral movement A of the anterior jaw begins at the same time as activation of film-feeding unit 15 , 115 and the difference in speed between the two movements determines the percentage stretching of the film, which is usually over 100%.
  • motor 17 acts as a brake, or better applies changing friction, controlling the stretching of the film but without causing the latter to stop on forming mandrel 1 , with the advantage that it assists the operation of welding unit 18 , which can now operate substantially continuously and with the advantage that it prevents film stopping on the mandrel, thus preventing friction on first detachment and consequent local tensions in the film and unsightliness in the packaging, as was on the contrary the case in the prior art.
  • lateral movement A of the jaw ceases in phase with the rotational movement B of rollers 15 , 115 , but is reactivated in proper phase with sealing movement C of jaw 119 on the tail end of forming packaging Z.
  • rollers 15 , 115 and motor 17 continue to feed a little film to the forming mandrel in a controlled way to reduce longitudinal stretching during posterior closure and welding of the said packaging formed, by posterior jaw 119 .
  • the quantity of material which is actively delivered during this last stage depends in a directly proportional way on the height of product P, and this is brought about through processor 13 which has determined the dimensions of the product which has to be packed using aforesaid means 30 and 2 .
  • motor 17 with controlled speed and phase makes possible easy control of both the position and speed of film feed rollers 15 , 115 to ensure that the advance of the film is in phase with respect to the jaw movements through the position adjustment control loop and the difference in linear feed between said feed rollers 15 , 115 and the movements of the said jaws through the speed adjustment loop, all in such a way as to ensure good control of film stretching.
  • the example in the diagram in FIG. 3 differs from the preceding situation in FIG. 2 in that movement B of film feed rollers 15 , 115 begins after lateral movement A of the upstream jaw and stops before the said movement A so that the film packaging is stretched by a greater amount and adheres to product P. It is obvious that at the start of the next packaging cycle, when the film has to be unwound for the next pack, the film will be under greater tension.
  • the stopping of movement B activating rollers 15 , 115 can be delayed, as illustrated for example in the diagram in FIG. 4 , or its start may be brought forward with respect to movements A and/or C of the jaws, as illustrated in the diagram in FIG. 5 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Basic Packing Technique (AREA)
  • Laminated Bodies (AREA)
US11/568,518 2004-06-01 2005-05-27 Process and machine for packaging products with stretchable thermoplastic film Abandoned US20070186512A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITBO2004A000349 2004-06-01
IT000349A ITBO20040349A1 (it) 2004-06-01 2004-06-01 Procedimento e macchina per il confezionamento di prodotti con film termoplastico estensibile e particolarmente del tipo ad effetto barriera
PCT/EP2005/052422 WO2005118401A1 (en) 2004-06-01 2005-05-27 Process and machine for packaging products with stretchable thermoplastic film

Publications (1)

Publication Number Publication Date
US20070186512A1 true US20070186512A1 (en) 2007-08-16

Family

ID=34969610

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/568,518 Abandoned US20070186512A1 (en) 2004-06-01 2005-05-27 Process and machine for packaging products with stretchable thermoplastic film

Country Status (9)

Country Link
US (1) US20070186512A1 (zh)
EP (1) EP1751003B1 (zh)
JP (1) JP2008500928A (zh)
CN (1) CN1960914A (zh)
AT (1) ATE432222T1 (zh)
CA (1) CA2565281A1 (zh)
DE (1) DE602005014633D1 (zh)
IT (1) ITBO20040349A1 (zh)
WO (1) WO2005118401A1 (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100242410A1 (en) * 2009-03-24 2010-09-30 Rethceif Enterprises, Llc Packaging apparatus and method of packaging
US20140298755A1 (en) * 2013-04-08 2014-10-09 Alain Cerf Multiple Sealing Bars for Film Wrapping
US20150013274A1 (en) * 2013-07-12 2015-01-15 Ulma Packaging Technological Center, S.Coop. Product wrapping machine and operating method for a product wrapping machine
US10850876B2 (en) * 2015-06-09 2020-12-01 Cryovac, Llc Apparatus and process for packaging products

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7904193B2 (en) * 2006-09-29 2011-03-08 Nellcor Puritan Bennett Llc Systems and methods for providing custom masks for use in a breathing assistance system
US20110023413A1 (en) * 2009-07-31 2011-02-03 Ishida Co., Ltd. Packaging apparatus
CN104229518A (zh) * 2014-08-22 2014-12-24 安庆市兴丰工贸有限公司 一种变频吹膜机摩擦收卷控制方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2914893A (en) * 1952-03-11 1959-12-01 Carl J Berst Method and apparatus for packaging in a pre-stretched wrap of subsequently shrinkable material
US3589091A (en) * 1968-09-06 1971-06-29 Cloud Machine Corp Method and apparatus for wrapping or labeling a package
US4288965A (en) * 1979-08-27 1981-09-15 Hayssen Manufacturing Company Form-fill-seal packaging method and apparatus
US4729210A (en) * 1984-02-02 1988-03-08 Padeco S.A. Process and apparatus for packaging articles in stretchable plastic film
US4872302A (en) * 1986-02-27 1989-10-10 Borden Bv Method of, and apparatus for, wrapping articles in a plastic film
US6047521A (en) * 1992-06-29 2000-04-11 Pacmac, Inc. Vertical form, fill and seal machine for making reclosable bags
US7076930B2 (en) * 2001-12-19 2006-07-18 A.W.A.X. Progettazione E Ricerca Process and machine for packaging products with stretchable thermoplastic film

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2914893A (en) * 1952-03-11 1959-12-01 Carl J Berst Method and apparatus for packaging in a pre-stretched wrap of subsequently shrinkable material
US3589091A (en) * 1968-09-06 1971-06-29 Cloud Machine Corp Method and apparatus for wrapping or labeling a package
US4288965A (en) * 1979-08-27 1981-09-15 Hayssen Manufacturing Company Form-fill-seal packaging method and apparatus
US4288965B1 (zh) * 1979-08-27 1985-03-26
US4729210A (en) * 1984-02-02 1988-03-08 Padeco S.A. Process and apparatus for packaging articles in stretchable plastic film
US4872302A (en) * 1986-02-27 1989-10-10 Borden Bv Method of, and apparatus for, wrapping articles in a plastic film
US6047521A (en) * 1992-06-29 2000-04-11 Pacmac, Inc. Vertical form, fill and seal machine for making reclosable bags
US7076930B2 (en) * 2001-12-19 2006-07-18 A.W.A.X. Progettazione E Ricerca Process and machine for packaging products with stretchable thermoplastic film

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100242410A1 (en) * 2009-03-24 2010-09-30 Rethceif Enterprises, Llc Packaging apparatus and method of packaging
US7891156B2 (en) 2009-03-24 2011-02-22 Rethceif Enterprises, Llc Packaging apparatus and method of packaging
US20140298755A1 (en) * 2013-04-08 2014-10-09 Alain Cerf Multiple Sealing Bars for Film Wrapping
US9533781B2 (en) * 2013-04-08 2017-01-03 Alain Cerf Multiple sealing bars for film wrapping
US20150013274A1 (en) * 2013-07-12 2015-01-15 Ulma Packaging Technological Center, S.Coop. Product wrapping machine and operating method for a product wrapping machine
US10850876B2 (en) * 2015-06-09 2020-12-01 Cryovac, Llc Apparatus and process for packaging products

Also Published As

Publication number Publication date
ATE432222T1 (de) 2009-06-15
EP1751003A1 (en) 2007-02-14
CA2565281A1 (en) 2005-12-15
ITBO20040349A1 (it) 2004-09-01
CN1960914A (zh) 2007-05-09
WO2005118401A1 (en) 2005-12-15
EP1751003B1 (en) 2009-05-27
DE602005014633D1 (de) 2009-07-09
JP2008500928A (ja) 2008-01-17

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Date Code Title Description
AS Assignment

Owner name: A.W.A.X. PROGETTAZIONE E RICERCA S.R.I., ITALY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:RIMONDI, RENATO;REEL/FRAME:018869/0297

Effective date: 20061004

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION