WO2003006336A1 - Opening device for flexible packaging - Google Patents

Opening device for flexible packaging Download PDF

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Publication number
WO2003006336A1
WO2003006336A1 PCT/ES2002/000322 ES0200322W WO03006336A1 WO 2003006336 A1 WO2003006336 A1 WO 2003006336A1 ES 0200322 W ES0200322 W ES 0200322W WO 03006336 A1 WO03006336 A1 WO 03006336A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
mouth
heat
opening
sealed area
Prior art date
Application number
PCT/ES2002/000322
Other languages
Spanish (es)
French (fr)
Inventor
José PORTOLES CEBRIÁ
Original Assignee
Volpak, S.A.
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 Volpak, S.A. filed Critical Volpak, S.A.
Publication of WO2003006336A1 publication Critical patent/WO2003006336A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5816—Opening or contents-removing devices added or incorporated during package manufacture for tearing a corner or other small portion next to the edge, e.g. a U-shaped portion
    • B65D75/5822—Opening or contents-removing devices added or incorporated during package manufacture for tearing a corner or other small portion next to the edge, e.g. a U-shaped portion and defining, after tearing, a small dispensing spout, a small orifice or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/28—Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by associating or interconnecting two or more sheets or blanks
    • B65D75/30—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding

Definitions

  • the present invention relates to an opening device for flexible packages, of the type obtained by heat-sealable sheets and having in its upper part a heat-sealed zone, constitutive of the closure of the container and delimiting an opening portion, which, when torn, configures a mouth for pouring or for suction using a straw of the contained product.
  • These packages have a heat-sealed zone on the upper part, constituting the closure of the container and which delimits an opening portion, which, when torn, forms a mouth for the pouring of the contained product or for the suction thereof by means of a straw introduced in the container.
  • the object of the invention is intended to allow guided tearing of the container during opening thereof, avoiding the deviation of the tear line and the uncontrolled loss or pouring of the contents.
  • the device according to the invention is applicable to flexible packages formed by heat-welded sheets provided in their upper part with a heat-sealed zone that constitutes the closure of the container and that delimits an opening portion, which when torn creates a mouth for the extraction of the product contained in the package, being defined in the sealed area a cut and / or perforations that mark the beginning of the tear line.
  • the device object of the invention comprises a reinforcement arranged transversely in an intermediate area of the mouth of the container, defining a tear guide during opening thereof.
  • the reinforcement is longer than the width of the mouth of the container and its ends are positioned in correspondence with the sealed area of the container.
  • the reinforcement comprises a strip of tear-resistant heat-sealable material, disposed between the two heat-sealing sheets constituting the container, leaving an intermediate portion of the band of heat-sealable material disposed transversely in the mouth of the container and its ends fixed by welding in the sealed area thereof.
  • the reinforcement comprises a thickening of the heat-welded laminate formed by two consecutive folds thereof, arranged transversely on the mouth portion of the container, its ends being fixed by heat welding in the sealed area of the container .
  • This reinforcement being constituted by folds of the own heat-sealable sheet constituting the container, does not require the provision of additional strips or bands of heat-weldable and tear-resistant material.
  • the reinforcement comprises a sheet of tear-resistant material fixed on the package transversely in the opening portion of the mouth.
  • Fig. 1 is a perspective view of the upper part of a flexible package with the heat-sealable laminates partially separated, provided with a first embodiment of the device according to the invention
  • Fig. 2 is an elevational view of the container of Fig. 1
  • Fig. 3 is a perspective view of a flexible package, analogous to that of Fig. 1, provided with a second embodiment of the device according to the invention
  • Fig. 4 is an elevational view of the upper part of a flexible package, provided with a third embodiment of the device according to the invention.
  • the flexible packages (1) represented in the attached drawings are formed by two heat-sealable sheets (11, 12) that have a sealed area (13) in their upper part that delimits an opening portion (14) that configures the mouth of the container, once it has been opened by tearing.
  • the heat-sealable sheets (11 and 12) are provided with perforations (15) that mark the beginning of the tear line, to facilitate the opening of the container (1).
  • the flexible container (1) has an additional band (21) of heat-weldable and tear-resistant material, positioned between the heat-sealable sheets (11 and 12) and disposed transversely on the opening portion (14) of the mouth , the ends being heat-welded together with the sealed area (13).
  • the additional band (21) constitutes a reinforcement that ensures the correct tearing of the container (1) during its opening from the perforations (15).
  • the container has in the opening portion (14) of the mouth a thickening (22) defined by two consecutive folds (16 and 17) of the heat-sealable sheet (12), which they extend transversely over the opening portion (14) of the mouth, its ends being fixed by heat welding.
  • the flexible container (1) is provided with a sheet (23) of tear-resistant material, adhered on the outer surface of the container (1) and sized in correspondence with the portion of opening (14) of the mouth.

Abstract

The invention relates to an opening device for flexible packaging of the type that is produced using thermoweldable layers (11, 12) and the upper part of which is provided with an area (13) which is sealed by means of thermowelding and which forms the closure device for the packaging (1). When a defined portion of the opening (14) is torn away, a mouth is formed which is used to pour or suck up the product contained in the packaging (1). Said sealed area (13) is provided with a slit and/or holes (15) which mark the beginning of a tear line. The inventive device comprises a transversely-disposed stiffening element on the portion for opening (14) the mouth of the packaging (1) which defines a tear guide during the opening of the device. The length of said stiffening element is greater than the width of the portion for opening (14) the mouth and the ends thereof are positioned so as to correspond with the sealed area (13) of the packaging (1).

Description

D E S C R I P C I Ó N D E S C R I P C I Ó N
DISPOSITIVO DE APERTURA PARA ENVASES FLEXIBLESOPENING DEVICE FOR FLEXIBLE CONTAINERS
Sector técnico de la invenciónTechnical sector of the invention
La presente invención se refiere a un dispositivo de apertura para envases flexibles, del tipo de los obtenidos mediante láminas termosoldables y que presentan en su parte superior una zona sellada por termosoldadura, cons- titutiva del cierre del envase y que delimita una porción de apertura, que al ser rasgada configura una boca para el vertido o para la succión mediante una pajilla del producto contenido.The present invention relates to an opening device for flexible packages, of the type obtained by heat-sealable sheets and having in its upper part a heat-sealed zone, constitutive of the closure of the container and delimiting an opening portion, which, when torn, configures a mouth for pouring or for suction using a straw of the contained product.
Antecedentes de la invenciónBackground of the invention
En la actualidad existen en el mercado diferentes tipos de envases flexibles, formados a partir de laminados termosoldables y que son empleados para comercializar productos líquidos y productos sólidos, tanto en porcio- nes como en granulos o en polvo.At present there are different types of flexible packaging on the market, formed from heat-welded laminates and which are used to commercialize liquid products and solid products, both in portions and in granules or powder.
Estos envases presentan en su parte superior una zona sellada por termosoldadura, constitutiva del cierre del envase y que delimita una porción de apertura, que al ser rasgada configura una boca para el vertido del producto contenido o para la succión del mismo por medio de una pajilla introducida en el envase.These packages have a heat-sealed zone on the upper part, constituting the closure of the container and which delimits an opening portion, which, when torn, forms a mouth for the pouring of the contained product or for the suction thereof by means of a straw introduced in the container.
Estos envases flexibles presentan habitualmente en la zona sellada unas perforaciones que marcan el inicio de la linea de rasgadura a seguir para realizar la apertura del envase, planteándose con frecuencia un problema consistente en el desvío involuntario de la línea de rasgadura con la consiguiente rotura del envase y el derrame incontrolado de producto. Además, las perforaciones empleadas para marcar la línea de rasgadura solo se pueden realizar en las zonas termosoldadas, por ejemplo mediante láser o mediante la orientación de las moléculas de la lámina. En cualquier caso, se provoca un debilitamiento de la resistencia de la lámina, con el consiguiente riesgo de aparición de fugas del contenido líquido al ser sometido el envase a presión, como así ocurre durante los procesos de encájado, paletizado y transporte.These flexible packages usually have perforations in the sealed area that mark the beginning of the tear line to be followed to open the container, often posing a problem consisting of the involuntary deviation of the tear line with the consequent breakage of the container. and uncontrolled product spill. In addition, the perforations used to mark the tear line can only be performed in heat-welded areas, for example by laser or by orientation of the molecules of the sheet. In any case, a weakening of the resistance of the sheet is caused, with the consequent risk of leakage of the liquid content when the container is subjected to pressure, as is the case during the curling, palletizing and transport processes.
Descripción de la invenciónDescription of the invention
El dispositivo objeto de la invención tiene por objeto permitir la rasgadura guiada del envase durante la apertura del mismo, evitando el desvío de la línea de rasgadura y la pérdida o vertido incontrolado del contenido .The object of the invention is intended to allow guided tearing of the container during opening thereof, avoiding the deviation of the tear line and the uncontrolled loss or pouring of the contents.
El dispositivo según la invención es aplicable a en- vases flexibles formados por láminas termosoldables provistas en su parte superior de una zona sellada por termosoldadura que constituye el cierre del envase y que delimita una porción de apertura, que al ser rasgada configura una boca para la extracción del producto contenido en el envase, encontrándose definida en la zona sellada un corte y/o unas perforaciones que marcan el inicio de la línea de rasgadura.The device according to the invention is applicable to flexible packages formed by heat-welded sheets provided in their upper part with a heat-sealed zone that constitutes the closure of the container and that delimits an opening portion, which when torn creates a mouth for the extraction of the product contained in the package, being defined in the sealed area a cut and / or perforations that mark the beginning of the tear line.
El dispositivo objeto de la invención comprende un refuerzo dispuesto transversalmente en una zona intermedia de la boca del envase, definiendo una guía de rasgadura durante la apertura del mismo. El refuerzo tiene una longitud superior al ancho de la boca del envase y sus extremos quedan posicionados en correspondencia con la zona sellada del envase. Según un primer modo de realización, el refuerzo comprende una banda de material termosoldable resistente a la rasgadura, dispuesta entre las dos láminas termosoldables constitutivas del envase, quedando una porción in- termedia de la banda de material termosoldable dispuesta transversalmente en la boca del envase y sus extremos fijados por termosoldadura en la zona sellada del mismo.The device object of the invention comprises a reinforcement arranged transversely in an intermediate area of the mouth of the container, defining a tear guide during opening thereof. The reinforcement is longer than the width of the mouth of the container and its ends are positioned in correspondence with the sealed area of the container. According to a first embodiment, the reinforcement comprises a strip of tear-resistant heat-sealable material, disposed between the two heat-sealing sheets constituting the container, leaving an intermediate portion of the band of heat-sealable material disposed transversely in the mouth of the container and its ends fixed by welding in the sealed area thereof.
De acuerdo con un segundo modo de realización, el refuerzo comprende un regruesamiento del laminado termosoldable formado mediante dos pliegues consecutivos del mismo, dispuestos transversalmente sobre la porción de la boca del envase, quedando sus extremos fijados por termo- soldadura en la zona sellada del envase. Este refuerzo, al estar constituido por unos pliegues de la propia lámina termosoldable constitutiva del envase, no requiere la aportación de tiras o bandas adicionales de material termosoldable y resistente a la rasgadura.According to a second embodiment, the reinforcement comprises a thickening of the heat-welded laminate formed by two consecutive folds thereof, arranged transversely on the mouth portion of the container, its ends being fixed by heat welding in the sealed area of the container . This reinforcement, being constituted by folds of the own heat-sealable sheet constituting the container, does not require the provision of additional strips or bands of heat-weldable and tear-resistant material.
Según un tercer modo de realización, el refuerzo comprende una lámina de material resistente a la rasgadura fijada sobre el envase transversalmente en la porción de apertura de la boca.According to a third embodiment, the reinforcement comprises a sheet of tear-resistant material fixed on the package transversely in the opening portion of the mouth.
Con el dispositivo según la invención, al realizar la apertura del envase flexible a partir de las perforaciones o cortes iniciales, la rasgadura del envase seguirá el refuerzo correspondiente, quedando asegurada su correcta apertura .With the device according to the invention, when opening the flexible container from the initial perforations or cuts, the tearing of the container will follow the corresponding reinforcement, ensuring its correct opening.
Descripción de las figurasDescription of the figures
Para complementar la descripción que se está realizando y con objeto de facilitar la comprensión de las características de la invención, se acompaña a la presente memoria descriptiva un juego de dibujos, con carácter ilustrativo y no limitativo, en los que: la Fig. 1 es una vista en perspectiva de la parte superior de un envase flexible con los laminados termosoldables parcialmente separados, provista de un primer modo de realización del dispositivo según la invención; la Fig. 2 es una vista en alzado del envase de la Fig. 1; la Fig. 3 es una vista en perspectiva de un envase flexible, análoga a la de la Fig. 1, provisto de un se- gundo modo de realización del dispositivo según la invención; y la Fig. 4 es una vista en alzado de la parte superior de un envase flexible, provisto de un tercer modo de realización del dispositivo según la invención.To complement the description that is being made and in order to facilitate the understanding of the features of the invention, a set of drawings, illustrative and non-limiting, in which: Fig. 1 is a perspective view of the upper part of a flexible package with the heat-sealable laminates partially separated, provided with a first embodiment of the device according to the invention; Fig. 2 is an elevational view of the container of Fig. 1; Fig. 3 is a perspective view of a flexible package, analogous to that of Fig. 1, provided with a second embodiment of the device according to the invention; and Fig. 4 is an elevational view of the upper part of a flexible package, provided with a third embodiment of the device according to the invention.
Realización preferente de la invención Los envases flexibles (1) representados en los dibujos adjuntos están formados por dos láminas termosoldables (11, 12) que tienen en su parte superior una zona sellada (13) que delimita una porción de apertura (14) que configura la boca del envase, una vez realizada la apertura del mismo por rasgadura.PREFERRED EMBODIMENT OF THE INVENTION The flexible packages (1) represented in the attached drawings are formed by two heat-sealable sheets (11, 12) that have a sealed area (13) in their upper part that delimits an opening portion (14) that configures the mouth of the container, once it has been opened by tearing.
En la zona sellada (13) las láminas termosoldables (11 y 12) están dotadas de unas perforaciones (15) que marcan el inicio de la línea de rasgadura, para facilitar la apertura del envase (1) .In the sealed area (13) the heat-sealable sheets (11 and 12) are provided with perforations (15) that mark the beginning of the tear line, to facilitate the opening of the container (1).
En el modo de realización mostrado en las Figs . 1 y 2, el envase flexible (1) tiene una banda adicional (21) de material termosoldable y resistente a la rasgadura, posicionada entre las láminas termosoldables (11 y 12) y dispuesta transversalmente sobre la porción de apertura (14) de la boca, quedando sus extremos termosoldados con- juntamente con la zona sellada (13) . La banda adicional (21) constituye un refuerzo que asegura la rasgadura correcta del envase (1) durante su apertura a partir de las perforaciones (15) .In the embodiment shown in Figs. 1 and 2, the flexible container (1) has an additional band (21) of heat-weldable and tear-resistant material, positioned between the heat-sealable sheets (11 and 12) and disposed transversely on the opening portion (14) of the mouth , the ends being heat-welded together with the sealed area (13). The additional band (21) constitutes a reinforcement that ensures the correct tearing of the container (1) during its opening from the perforations (15).
En el modo de realización mostrado en la Fig. 3, el envase tiene en la porción de apertura (14) de la boca un regruesamiento (22) definido por dos pliegues consecutivos (16 y 17) de la lámina termosoldable (12) , que se extienden transversalmente sobre la porción de apertura (14) de la boca, quedando sus extremos fijados por termo- soldadura.In the embodiment shown in Fig. 3, the container has in the opening portion (14) of the mouth a thickening (22) defined by two consecutive folds (16 and 17) of the heat-sealable sheet (12), which they extend transversely over the opening portion (14) of the mouth, its ends being fixed by heat welding.
En el modo de realización mostrado en la Fig. 4, el envase flexible (1) está provisto de una lámina (23) de material resistente la rasgadura, adherida sobre la superficie exterior del envase (1) y dimensionada en correspondencia con la porción de apertura (14) de la boca. In the embodiment shown in Fig. 4, the flexible container (1) is provided with a sheet (23) of tear-resistant material, adhered on the outer surface of the container (1) and sized in correspondence with the portion of opening (14) of the mouth.

Claims

REIVINDICACIONES
1.- Dispositivo de apertura para envases flexibles, del tipo de los obtenidos mediante láminas termosoldables (11, 12) y que presentan en su parte superior una zona sellada (13) por termosoldadura constitutiva del cierre del envase (1) , quedando delimitada una porción de apertura (14) que al ser rasgada configura una boca para el vertido o para la succión del producto contenido en el envase (1) , estando provista la zona sellada (13) de un corte y/o unas perforaciones (15) que marcan el inicio de una línea de rasgadura, caracterizado porque comprende un refuerzo dispuesto transversalmente sobre la porción de apertura (14) de la boca del envase (1) que define una guía de rasgadura durante la apertura del mismo.1.- Opening device for flexible packages, of the type obtained by heat-sealable sheets (11, 12) and which have a sealed area (13) in their upper part by heat welding constitutive of the closure of the container (1), being defined a opening portion (14) which, when torn, configures a mouth for pouring or for suction of the product contained in the container (1), the sealed area (13) being provided with a cut and / or perforations (15) that they mark the beginning of a tear line, characterized in that it comprises a reinforcement arranged transversely on the opening portion (14) of the mouth of the container (1) that defines a tear guide during the opening thereof.
2.- Dispositivo según la reivindicación 1, caracterizado porque el refuerzo tiene una longitud superior al ancho de la porción de apertura (14) de la boca y sus extremos quedan posicionados en correspondencia con la zona sellada (13) del envase (1) .2. Device according to claim 1, characterized in that the reinforcement has a length greater than the width of the opening portion (14) of the mouth and its ends are positioned in correspondence with the sealed area (13) of the container (1).
3.- Dispositivo según las reivindicaciones 1 y 2, caracterizado porque el refuerzo comprende una banda (21) de material termosoldable resistente a la rasgadura dispuesta entre las dos láminas termosoldables- (11, 12) constitutivas del envase (1) , quedando una porción intermedia de la banda (21) dispuesta transversalmente en la boca del envase y con sus extremos fijados por termosoldadura a la zona sellada (13) del mismo.3. Device according to claims 1 and 2, characterized in that the reinforcement comprises a strip (21) of tear-resistant heat-sealable material disposed between the two heat-sealable sheets- (11, 12) constituting the container (1), leaving a portion intermediate band (21) arranged transversely in the mouth of the container and with its ends fixed by heat welding to the sealed area (13) thereof.
4.- Dispositivo según las reivindicaciones 1 y 2, caracterizado porque el refuerzo comprende un regruesa- miento (21) de la lámina termosoldable (12) , formado me- diante dos pliegues consecutivos (16, 17) del mismo que se extienden transversalmente sobre la porción de apertura (14) de la boca del envase, quedando sus extremos fijados por termosoldadura en la zona sellada (13) .4. Device according to claims 1 and 2, characterized in that the reinforcement comprises a thickening (21) of the heat-sealable sheet (12), formed by for two consecutive folds (16, 17) thereof that extend transversely over the opening portion (14) of the mouth of the container, its ends being fixed by heat welding in the sealed area (13).
5.- Dispositivo según las reivindicaciones 1 y 2, caracterizado porque el refuerzo comprende una lámina5. Device according to claims 1 and 2, characterized in that the reinforcement comprises a sheet
(23) de material resistente a la rasgadura, fijada sobre el envase transversalmente en la porción de apertura (14) de la boca. (23) of tear-resistant material, fixed on the container transversely in the opening portion (14) of the mouth.
PCT/ES2002/000322 2001-07-10 2002-07-01 Opening device for flexible packaging WO2003006336A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESU0101766 2001-07-10
ES200101766U ES1049584Y (en) 2001-07-10 2001-07-10 OPENING DEVICE FOR FLEXIBLE CONTAINERS.

Publications (1)

Publication Number Publication Date
WO2003006336A1 true WO2003006336A1 (en) 2003-01-23

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WO (1) WO2003006336A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5116140A (en) * 1990-06-15 1992-05-26 Kazuyoshi Hirashima Easy-to-open synthetic resin bag
US5121997A (en) * 1990-10-09 1992-06-16 Illinois Tool Words Inc. Perforated tear strip for easy-open flexible containers
EP0595722A1 (en) * 1992-10-30 1994-05-04 Sony Corporation Package employing a packaging film with a releasable tab and method for wrapping an article with the packaging film

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5116140A (en) * 1990-06-15 1992-05-26 Kazuyoshi Hirashima Easy-to-open synthetic resin bag
US5121997A (en) * 1990-10-09 1992-06-16 Illinois Tool Words Inc. Perforated tear strip for easy-open flexible containers
EP0595722A1 (en) * 1992-10-30 1994-05-04 Sony Corporation Package employing a packaging film with a releasable tab and method for wrapping an article with the packaging film

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Publication number Publication date
ES1049584Y (en) 2002-04-16
ES1049584U (en) 2001-12-16

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