US20040065055A1 - Machine and method for wrapping products - Google Patents

Machine and method for wrapping products Download PDF

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Publication number
US20040065055A1
US20040065055A1 US10/450,644 US45064403A US2004065055A1 US 20040065055 A1 US20040065055 A1 US 20040065055A1 US 45064403 A US45064403 A US 45064403A US 2004065055 A1 US2004065055 A1 US 2004065055A1
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US
United States
Prior art keywords
wrapping
machine
path
heat sealing
belt
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
US10/450,644
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English (en)
Inventor
Mario Spatafora
Bruno Tommasini
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
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Filing date
Publication date
Application filed by GD SpA filed Critical GD SpA
Assigned to G.D SOCIETA' PER AZIONI reassignment G.D SOCIETA' PER AZIONI ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SPATAFORA, MARIO, TOMMASINI, BRUNO
Publication of US20040065055A1 publication Critical patent/US20040065055A1/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
    • 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
    • B65B51/18—Applying or generating heat or pressure or combinations thereof by endless bands or chains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • B29C65/32—Induction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8221—Scissor or lever mechanisms, i.e. involving a pivot point
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8244—Actuating mechanisms magnetically driven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83511—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83521—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on bands or belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/849—Packaging machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
    • B29C66/93451—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed by controlling or regulating the rotational speed, i.e. the speed of revolution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
    • B29C66/944—Measuring or controlling the joining process by measuring or controlling the time by controlling or regulating the time
    • 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
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/06—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths
    • B65B11/28—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a curved path, e.g. on rotary tables or turrets
    • B65B11/30—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a curved path, e.g. on rotary tables or turrets to fold the wrappers in tubular form about 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
    • 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
    • B65B19/223—Wrapping the cigarettes; Packaging the cigarettes in containers formed by folding wrapping material around formers in a curved path; in a combination of straight and curved paths, e.g. on rotary tables or other endless conveyors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81261—Thermal properties, e.g. thermal conductivity, thermal expansion coefficient
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81262—Electrical and dielectric properties, e.g. electrical conductivity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83521—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on bands or belts
    • B29C66/83523—Cooperating jaws mounted on cooperating bands or belts and moving in a closed path
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83531—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on chains

Definitions

  • the present invention relates to a machine for wrapping products.
  • the present invention relates to a continuous cellophaning machine for wrapping a packet of cigarettes in a respective sheet of transparent heat-seal material, to which the following description refers purely by way of example.
  • the present invention also relates to a method of wrapping products.
  • FIG. 1 shows a schematic elevation of a preferred embodiment of the machine according to the present invention
  • FIG. 2 shows a larger-scale elevation of a detail in FIG. 1;
  • FIG. 3 shows a section along line III-III in FIG. 2;
  • FIG. 4 shows a larger-scale elevation of a further detail of the FIG. 1 machine
  • FIG. 5 shows a larger-scale elevation of a variation of a detail in FIG. 1.
  • Number 1 in FIG. 1 indicates as a whole a machine for wrapping packets 2 of cigarettes in respective sheets 3 of heat-seal wrapping material, in particular, sheets of polypropylene or similar.
  • Machine 1 comprises a wrapping wheel 4 , which rotates continuously about a respective horizontal axis 5 perpendicular to the FIG. 1 plane, and has a number of peripheral seats 6 .
  • Each seat 6 receives a respective packet 2 and a respective sheet 3 of wrapping material at an input station S 1 , and feeds respective packet 2 and respective sheet 3 of wrapping material along a wrapping path P 1 and a subsequent stabilizing path P 2 to an output station S 2 .
  • each sheet 3 of wrapping material is folded in known manner about respective packet 2 to form a tubular wrapping 7 by superimposing two end portions 8 of sheet 3 of wrapping material; along stabilizing path P 2 , each tubular wrapping 7 is stabilized by heat sealing the two end portions 8 to each other; and, once the sealing operations are completed, each wrapping 7 reaches output station S 2 where it is expelled from respective seat 6 by a known unloading device not shown.
  • Machine 1 also comprises a sealing device 9 , which in turn comprises a number of sealing members 10 , each having a respective known sealing head 11 , which is heated by means of a respective known electric resistor (not shown) and is applied to a respective tubular wrapping 7 for a given length of time to heat seal respective superimposed end portions 8 .
  • Sealing device 9 also comprises a belt conveyor 12 , which has an endless flexible belt 13 supporting sealing heads 11 on its outer face 14 .
  • the number of sealing members 10 equals the number of peripheral seats 6 , so that each peripheral seat 6 operates at all times with the same sealing member 10 , thus simplifying adjustment and set-up of machine 1 .
  • Each sealing member 10 is fed by belt 13 in time with a respective wrapping 7 and along a path P 3 parallel to path P 2 , so that each sealing head 11 is applied to respective tubular wrapping 7 for a given length of time and so heat seals tubular wrapping 7 .
  • path P 3 forms a portion of an endless path P 4 , along which sealing heads 11 are fed cyclically by the continuous movement of belt 13 .
  • paths P 1 , P 2 , P 3 are substantially arcs of a circle with a common center at axis 5 .
  • Conveyor 12 also comprises a guide device 15 for feeding belt 13 along endless path P 4 and, in particular, along curved portion P 3 .
  • Guide device 15 comprises three end pulleys 16 , 17 , 18 having respective axes of rotation parallel to axis 5 and about which belt 13 is wound.
  • Pulleys 16 and 17 are located at opposite ends of path P 3
  • pulley 18 is located between pulleys 16 and 17 to define, with pulleys 16 and 17 , the vertices of an isosceles triangle.
  • pulley 17 is powered, and pulleys 16 and 18 are idle.
  • the rotation speed of pulley 17 is such that the peripheral speed of sealing heads 11 along path P 3 equals the peripheral speed of seats 6 along path P 2 .
  • Guide device 15 also comprises a contoured track 19 of the same shape as path P 4 ; and a connecting device 20 for connecting belt 13 to track 19 .
  • track 19 only extends along path P 3 .
  • Contoured track 19 is defined by two identical facing grooves 21 formed in two parallel flat plates 22 , which are perpendicular to axis 5 and located on opposite sides of belt 13 .
  • Connecting device 20 comprises a number of carriages 23 , each of which is supported by a respective appendix 24 fixed to the inner face 25 of belt 13 , engages both grooves 21 , and comprises a shaft 26 integral with respective appendix 24 and supporting, at opposite ends, two idle wheels 27 , each rolling along respective groove 21 .
  • Each flat plate 22 is substantially rectangular and has a semicircular recess at and for avoiding interference with wrapping wheel 4 .
  • guide device 15 only comprises end pulleys 16 and 17 having respective axes of rotation parallel to axis 5 , and about which belt 13 is wound.
  • Each sealing head 11 is fitted to a respective substantially Z-shaped frame 28 comprising a central plate 29 , which, at one end, has a lateral appendix 30 facing belt 13 and connected to belt 13 by a transverse hinge 31 parallel to the axes of pulleys 16 and 17 , and, at the other end, has a lateral appendix 32 facing outwards and supporting respective sealing head 11 by a hinge 33 parallel to hinge 31 .
  • supporting frame 28 is connected to belt 13 by a connecting rod 34 enabling frame 28 to adapt to the varying curvature of belt 13 .
  • Each sealing head 11 substantially faces plate 29 of relative frame 28 , and oscillates about relative hinge 33 between a work position (FIG. 5) in which sealing head 11 contacts a respective wrapping 7 traveling along path P 2 , and a rest position in which sealing head 11 does not contact a respective wrapping 7 traveling along path P 2 .
  • the angular position of ach sealing head 11 about relative hinge 33 is controlled, on one side, by an elastic thrust system 35 interposed between sealing head 11 and relative frame 28 and for maintaining sealing head 11 in said work position, and, on the other side, by a return device 36 for moving sealing head 11 towards relative plate 29 and into said rest position.
  • Return device 36 comprises an armature 37 of ferromagnetic material, which is hinged at one end to relative sealing head 11 and engages in sliding manner two through holes 38 and 39 formed through relative plate 29 and belt 13 respectively.
  • the portion of each armature 37 projecting inwards of belt 13 interferes, as armature 37 travels along path P 3 , with a magnetic field generated by a series of electromagnets 40 carried by plates 22 and which provide for moving sealing heads 22 away from wrappings 7 .
  • each sealing head 11 is applied to respective wrapping 7 is maintained constant alongside changes in the traveling speed of wrapping 7 along path P 2 , i.e. in the rotation speed of wrapping wheel 4 , by varying the actual length of path P 3 by means of electromagnets 40 , which provide for adjusting the length of path P 3 along which sealing heads 11 are applied to respective wrappings 7 .
  • Sealing heads 11 are made of material of relatively low thermal inertia and relatively high electric resistance, and are connected to one another in series by electric cables (not shown) to form a single endless turn 41 , along which flows an alternating electric current generated by induction by a variable magnetic field in turn generated by a known generating device 42 (shown schematically) connected magnetically to turn 41 . Adjusting the intensity and/or frequency with which the variable magnetic field is varied regulates the intensity of the current circulating in turn 41 , and therefore the working temperature of sealing heads 11 .
  • elastic system 35 and return device 36 are inverted, i.e. elastic system 35 keeps sealing head 11 in said rest position, and return device 36 moves head 11 into said work position.
  • the actual length of path P 3 is adjusted by means of electromagnets 40 , which, in this case, however, exert a force of repulsion to restore sealing heads 11 from the rest to the work position.
  • return device 36 is dispensed with, and the actual length of path P 3 is adjusted, for each sealing head 11 , by short-circuiting the ends of head 11 in controlled manner.
  • each sealing head 11 is actively applied to respective wrapping 7 is maintained constant, alongside variations in the rotation speed of wrapping wheel 4 , by deactivating sealing head 11 as opposed to moving it away from relative wrapping 7 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Wrapping Of Specific Fragile Articles (AREA)
  • Package Closures (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Basic Packing Technique (AREA)
US10/450,644 2000-12-21 2001-12-18 Machine and method for wrapping products Abandoned US20040065055A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITB02000A000735 2000-12-21
IT2000BO000735A ITBO20000735A1 (it) 2000-12-21 2000-12-21 Macchine e metodo per l'incarto di prodotti
PCT/IT2001/000638 WO2002049918A1 (en) 2000-12-21 2001-12-18 Machine and method for wrapping products

Publications (1)

Publication Number Publication Date
US20040065055A1 true US20040065055A1 (en) 2004-04-08

Family

ID=11438925

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JP (1) JP2004520235A (it)
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US20070028567A1 (en) * 2005-07-19 2007-02-08 Luca Lanzarini Method and device for wrapping articles

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US20030168444A1 (en) * 2002-03-05 2003-09-11 Liakopoulos Thomas W. Heat sealing device
ITBO20110745A1 (it) † 2011-12-22 2013-06-23 Gd Spa Essiccatore di pacchetti in una linea di confezionamento di articoli da fumo.

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US6425474B2 (en) * 1999-02-17 2002-07-30 G.D Societa' Per Azioni Conveyor for conveying articles on an automatic wrapping machine
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US4886912A (en) * 1987-02-17 1989-12-12 Mitsui Petrochemical Industries, Ltd. Cyanoguanidine derivative and process for preparation thereof
US4999970A (en) * 1988-07-18 1991-03-19 Korber Ag Apparatus for making cigarette packs and the like
US5839253A (en) * 1996-03-15 1998-11-24 G.D Societa' Per Azioni Product overwrapping machine
US5930976A (en) * 1996-07-26 1999-08-03 G.D Societa' Per Azioni Packet wrapping unit
US5996309A (en) * 1996-11-29 1999-12-07 Focke & Co. (Gmbh & Co.) Packaging machine with a rotary folding unit for manufacturing (soft) pouch-type packets for cigarettes
US6219999B1 (en) * 1998-07-08 2001-04-24 G. D Societa Per Azioni Method and machine for wrapping products
US6263644B1 (en) * 1998-07-08 2001-07-24 G. D Societa' Per Azioni Method and machine for wrapping a product in a sheet of heat-seal wrapping material
US6425474B2 (en) * 1999-02-17 2002-07-30 G.D Societa' Per Azioni Conveyor for conveying articles on an automatic wrapping machine
US6439376B1 (en) * 1999-06-22 2002-08-27 G. D Societa' Per Azioni Pocket conveyor

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US20070028567A1 (en) * 2005-07-19 2007-02-08 Luca Lanzarini Method and device for wrapping articles
US7360347B2 (en) * 2005-07-19 2008-04-22 G.D Societá per Azioni Method and device for wrapping articles
CN1970390B (zh) * 2005-07-19 2011-09-28 吉第联合股份公司 用于包装物品的方法和装置

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WO2002049918A1 (en) 2002-06-27
AU2002219504A1 (en) 2002-07-01
ITBO20000735A0 (it) 2000-12-21
JP2004520235A (ja) 2004-07-08
CN1482981A (zh) 2004-03-17
EP1351857A1 (en) 2003-10-15
ITBO20000735A1 (it) 2002-06-21

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