EP2033895A1 - Verfahren und Vorrichtung zum Verpacken, insbesondere für im wesentlichen zylindrische Elemente - Google Patents

Verfahren und Vorrichtung zum Verpacken, insbesondere für im wesentlichen zylindrische Elemente Download PDF

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Publication number
EP2033895A1
EP2033895A1 EP08163185A EP08163185A EP2033895A1 EP 2033895 A1 EP2033895 A1 EP 2033895A1 EP 08163185 A EP08163185 A EP 08163185A EP 08163185 A EP08163185 A EP 08163185A EP 2033895 A1 EP2033895 A1 EP 2033895A1
Authority
EP
European Patent Office
Prior art keywords
film
electrostatic
unit according
dispenser
series
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Withdrawn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
EP08163185A
Other languages
English (en)
French (fr)
Inventor
Roberto Cocchi
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.)
Amotek Srl
Original Assignee
Amotek 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 Amotek Srl filed Critical Amotek Srl
Publication of EP2033895A1 publication Critical patent/EP2033895A1/de
Withdrawn legal-status Critical Current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
    • B65B25/00—Packaging other articles presenting special problems
    • B65B25/14—Packaging paper or like sheets, envelopes, or newspapers, in flat, folded, or rolled form
    • B65B25/146—Packaging paper or like sheets, envelopes, or newspapers, in flat, folded, or rolled form packaging rolled-up articles
    • 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
    • B65B11/04—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material the articles being rotated

Definitions

  • the present invention relates to a packaging unit, particularly for substantially cylindrical elements, such as for example rolls of absorbent paper or the like.
  • One of the most common ways to obtain the desired winding is to make the roll perform a translational motion toward at least one portion of film, spread flat beforehand, until it rests against it; subsequent advancement of the roll against the surface of the film entails its partial wrapping therein, which is followed by the activation of other elements, which belong to a folding station, capable of completing the wrapping of the roll also on its two ends.
  • a heat-sealing device allows to complete the packaging operation.
  • a first drawback observed as a consequence of the technique that is used is that the film is scarcely stretched and therefore adheres poorly to the roll, generating an unpleasant aesthetic effect, which is particularly severe considering that the resulting packaging is in practice the one with which the product is presented to the end customer.
  • machines which have a station, arranged after the ones described, in which the film is made to adhere to the roll by heat-shrinking; in this case, the film must be made of a suitable material, such as polyethylene, PVC or any other heat-shrink material.
  • the heat-shrink treatment leads to a deformation of the material, which compromises the quality of any images, lettering or other graphic markings printed on the film, which are needed to customize and sell the product. It is therefore necessary to provide a further station in order to insert, between the roll and the film, an element, such as for example a sheet of paper or cardboard, on which the desired graphic markings are provided, with the consequent additional structural complication.
  • the aim of the present invention is to solve the above-mentioned drawbacks, by providing a packaging unit, particularly for substantially cylindrical elements, which is capable of ensuring correct adhesion of the film to the roll to be wrapped, without therefore the need to provide an additional tensioning unit in the automatic machine.
  • an object of the invention is to provide a packaging unit by means of which correct adhesion of the film to the roll does not depend on the type of material used.
  • Another object of the invention is to provide a packaging unit that allows to use preprinted films without compromising the quality of the applied graphic markings.
  • Another object of the invention is to provide a packaging unit that ensures high reliability in operation.
  • Another object of the invention is to provide a packaging unit that can be obtained easily starting from commonly commercially available elements and materials.
  • Another object of the invention is to provide a packaging unit that has low costs, is relatively simple to provide in practice and is safe in application.
  • a packaging unit particularly for substantially cylindrical elements, which comprises means for moving a substantially cylindrical element to be packaged and a dispenser of a film, which is adapted to package the element, characterized in that it comprises at least one electrostatic field generator, which is adapted to induce a difference in electrostatic potential between the element and the film, the difference in electrostatic potential causing the adhesion of the film to the element.
  • a packaging unit generally designated by the reference numeral 1, comprises movement means 2, for a substantially cylindrical element 3 to be packaged, and a dispenser 4 for film 5 adapted to package the element 3.
  • the movement means 2 comprise at least one conveyor belt, which forms, with respect to a suitable reference, a guiding duct 8 for the element 3.
  • the movement means 2 comprise a first series 9 of conveyor belts, which is arranged so as to be substantially parallel to a second series 10 of conveyor belts, which in practice constitutes such suitable reference.
  • the conveyor belts of the first series 9 move at a different speed with respect to those of the second series 10, so as to force the element 3, interposed between them, to perform a rolling motion along the guiding duct 8 delimited by them.
  • the second series 10 has a region of discontinuity 10a, so that a movable platform 11 that belongs to the dispenser 4, which moves the film 5, can reach the guiding duct 8; in this manner, the film 5 is made substantially to face the lateral surface of the element 3.
  • the unit 1 comprises at least one electrostatic field generator, which is adapted to induce a difference in electrostatic potential between the element 3 and the film 5, this difference causing the adhesion of the film 5 to the element 3 during the advancement of the latter by rolling.
  • the electrostatic field generator induces a preset electrostatic potential on the film 5, which is due to a surface accumulation of electrostatic charge; the film 5 can thus cling to the lateral surface of the element 3 in order to provide the desired wrapping.
  • the unit 1 comprises at least one induction electrode, which is connected electrically to the electrostatic field generator.
  • the unit 1 comprises two electrostatic field generators: the first one is preferably a 60-kV generator, in any case in a range between 15 and 150 kV, for inducing a first preset electrostatic potential produced by a first surface accumulation of electrostatic charge, on the film 5, and the second one is instead preferably a 25-kV generator, in any case in a range between 1 and 50 kV, in order to induce a second preset electrostatic potential, of opposite sign with respect to the first one, produced by a second surface accumulation of electrostatic charge, on the element 3.
  • the first one is preferably a 60-kV generator, in any case in a range between 15 and 150 kV, for inducing a first preset electrostatic potential produced by a first surface accumulation of electrostatic charge, on the film 5
  • the second one is instead preferably a 25-kV generator, in any case in a range between 1 and 50 kV, in order to induce a second preset electrostatic potential, of opposite sign with respect to the first one, produced by
  • the first electrostatic potential has a positive sign, while the second one has a negative sign.
  • the unit 1 thus comprises at least one first induction electrode 6 and at least one second induction electrode 7, which are respectively connected electrically to the first generator and to the second generator, and are arranged correspondingly along the paths traced by the film 5 and by the element 3 in order to form the first accumulation and the second accumulation of electrostatic charge.
  • the first induction electrode 6 is arranged proximate to the region of discontinuity 10a, in order to apply the first charge accumulation to the surface of the film 5, while the second induction electrode 7 is arranged along the guiding duct 8, in order to apply the second charge accumulation to the lateral surface of the element 3 during its rolling.
  • the film 5 when, indeed proximate to the region of discontinuity 10a, the film 5 faces the lateral surface of the element 3, the induced potential difference causes the film 5 to adhere at least to a portion of such lateral surface; the element 3 then continues to roll along the guiding duct 8, thus allowing the film 5 to completely wrap around the lateral surface of the element 3.
  • the packaging unit 1 can also comprise an adhesive dispenser, which is functionally associated with at least one of the surfaces of the element 3 or of the film 5 and is arranged substantially upstream of the region of discontinuity 10a, in order to facilitate the adhesion of the film 5 to the element 3, particularly if any electrostatic charges accumulated by the film 5 or by the element 3, as sometimes occurs during the preceding steps of processing, might compromise their correct adhesion.
  • the dispenser can deposit a predefined amount of adhesive on the film 5, being arranged proximate to a portion of the movable platform 11.
  • devices for closing the ends of the element 3 which comprise for example two plates 13 which are arranged laterally to the guiding duct 8, at a distance that is slightly greater than the length of the element 3, in order to be able to fold, again by way of the rolling motion imparted to the latter, the protruding portions of film 5 onto the upper and lower surfaces.
  • a device that is capable of performing the final heat-sealing and is constituted for example by a pair of Teflon-coated belts, which slide above spring-loaded heating units and are moved into contact with the upper and lower surfaces of the element 3, thus heat-sealing the previously folded film 5.
  • the heating units can be moved away from the belts if the machine stops.
  • the method for packaging substantially cylindrical elements 3 associated with a unit 1 entails feeding the movement means 2 with at least one element 3.
  • the element 3 can have a substantially tubular shape and can be constituted by a continuous winding of paper on a cylindrical core; such paper can be of the type of toilet paper and absorbent paper, i.e., materials suitable for the surface accumulation of electrostatic charge introduced by the electrostatic field generators.
  • the element 3 must then be moved by the movement means 2.
  • the different speed of the first series 9 and of the second series 10 of conveyor belts allows to impart to the element 3 a rolling motion, according to which it advances along a preset direction, defined by the guiding duct 8.
  • the dispenser 4 moves the film 5 so that it faces the lateral surface of the element 3, which is rolling along the guiding duct 8; the difference in induced electrostatic potential then causes the adhesion of the film 5 to such lateral surface of the element 3.
  • an adhesive dispenser which deposits a predefined amount of adhesive on at least one of the surfaces of the element 3 or of the film 5 in order to facilitate its adhesion.
  • the packaging unit according to the invention achieves the proposed aim, since the adhesion of the film 5 to the element 3 provided by electrostatic attraction, as a consequence of the induced electrostatic potential difference, allows to obtain, without the need for further devices or stages on the machine, a correctly tensioned wrapping, regardless of the material of which the film 5 is made, without running the risk of a deterioration of the quality of the images or graphic markings printed thereon.
  • the materials used, as well as the dimensions, may be any according to requirements and to the state of the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Laminated Bodies (AREA)
EP08163185A 2007-09-04 2008-08-28 Verfahren und Vorrichtung zum Verpacken, insbesondere für im wesentlichen zylindrische Elemente Withdrawn EP2033895A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITBO20070603 ITBO20070603A1 (it) 2007-09-04 2007-09-04 Gruppo di confezionamento, particolarmente per elementi sostanzialmente cilindrici.

Publications (1)

Publication Number Publication Date
EP2033895A1 true EP2033895A1 (de) 2009-03-11

Family

ID=40084173

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08163185A Withdrawn EP2033895A1 (de) 2007-09-04 2008-08-28 Verfahren und Vorrichtung zum Verpacken, insbesondere für im wesentlichen zylindrische Elemente

Country Status (2)

Country Link
EP (1) EP2033895A1 (de)
IT (1) ITBO20070603A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1053357A (de) * 1900-01-01
US4757667A (en) * 1981-11-05 1988-07-19 Elsner Engineering Works, Inc. Roll-wrapping method
GB2260959A (en) * 1991-10-31 1993-05-05 Wrapmatic Spa A device for inducing slack in a wrapping film, associated with means for heat sealing packs of rolls

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1053357A (de) * 1900-01-01
US4757667A (en) * 1981-11-05 1988-07-19 Elsner Engineering Works, Inc. Roll-wrapping method
GB2260959A (en) * 1991-10-31 1993-05-05 Wrapmatic Spa A device for inducing slack in a wrapping film, associated with means for heat sealing packs of rolls

Also Published As

Publication number Publication date
ITBO20070603A1 (it) 2009-03-05

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