WO2004089769A1 - Closure for tins - Google Patents
Closure for tins Download PDFInfo
- Publication number
- WO2004089769A1 WO2004089769A1 PCT/ES2004/000155 ES2004000155W WO2004089769A1 WO 2004089769 A1 WO2004089769 A1 WO 2004089769A1 ES 2004000155 W ES2004000155 W ES 2004000155W WO 2004089769 A1 WO2004089769 A1 WO 2004089769A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- flange
- closure
- cans
- sheet
- container
- 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.)
- Ceased
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Classifications
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- 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
- B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
- B65D77/10—Container closures formed after filling
- B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
- B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
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- 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
- B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
- B65D77/10—Container closures formed after filling
- B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
- B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
- B65D77/2028—Means for opening the cover other than, or in addition to, a pull tab
- B65D77/2032—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container
Definitions
- the present invention refers to a closure for cans, especially for canning cans, specifically of the type in which the lid of the can is materialized in a frame, fixable to the body of the can or single piece with á, determining a wide mouthpiece that is closed by a removable sheet.
- the object of the invention is to achieve maximum simplification in the means of fixing the sheet to the frame and perfect protection thereof both against the effects over time of the contents of the can itself and of the external environment that surrounds it, and all this with total absence of risk for the user during the opening manipulation of the can.
- conventional canning cans are structured by a body, based on a metal sheet suitably treated both externally and internally, a body that can adopt a prismatic, cylindrical or other configuration, and which in any case and after filling receives due to its opening to a closing cap, also metallic, of similar characteristics, which is mechanically flanged on the
- the aforementioned mouthpiece determines, in addition to a watertight closure, a perimeter rim usable in the subsequent opening maneuver or a support means for the classic can opener.
- the aforementioned conventional cans have been replaced, with increasing intensity, by those that incorporate a system commonly called "easy-open” in which the lid is provided, in the proximities of the aforementioned perimeter rim, of a die-cut determining a line of weakening that allows a tear opening, for which purpose the detachable sector of the cover is associated with a ring, first usable as a means of initiating the cut and immediately afterwards as ripping handle.
- the effect of heat sealing initially crushes the curl and, in the long run, can produce a rebound effect, modifying both the level of both seals and, consequently, the level of closure of the container. It is also worth noting that the double heat sealing not only makes it more difficult to open the container, but it can even lead to breakage due to the lid being broken or even spilling. Government liquid during the opening operation.
- the invention proposes solves in a fully satisfactory way the problems previously exposed, in the different aspects discussed.
- the invention focuses on the fact that the aforementioned flange presents its marginal zone, internal or external, flanged or folded by mechanical means, determining a substantially cylindrical curl or flange, so that the marginal zone of said flange close to its free edge is fixed by mechanical union to the initial zone of the flange, producing a mechanical closure by contact between both surfaces and thus hiding and protecting the free and initially cutting edge of the body.
- the configuration of the curl proposed by the invention in which the curl or flange is at a lower level than the rest of the flange or on the outside of the can, allows the sheet to be heat-fixed to the flange in the flat sector and the majority of it through a unique fixing perimeter line, which facilitates the detachment of the sheet during opening, without the need for another heat-sealing line inside the aforementioned curl or rim.
- the fixing of the sheet constituting the cover is carried out by heat welding on the ring or internal perimeter flange of the body in the flat and majority sector of said flange without the internal rim being thus affected by said union.
- Figure 1. Shows a perspective view of a can provided with the closure that constitutes the object of the present invention, in accordance with a classic example of practical embodiment for said can in which it adopts a configuration aimed at the rectangular prism.
- Figure 2. Shows an enlarged detail and in section of the can of the previous figure, at the level of its mouth and according to a first embodiment of the invention.
- Figure 3. Shows a section similar to the previous figure, but corresponding to a second embodiment of the invention.
- Figure 4.- Shows a third embodiment in which the closure is between the outer fold and the contents of the can.
- Figure 5. Shows a fourth embodiment in which the folding it is hidden below the edge of the can.
- the cover may lack the aforementioned frame (2) as a physically independent part of the body (1), so that the flange (3 ') is obtained from own body
- the sheet (4) can also be provided with a tab (5) for manual fractionation, which constitutes a handle that can be used in the opening maneuver.
- said flange (3-3 ') incorporates in its internal marginal zone a recess (7) or internal flange, substantially cylindrical, as seen in any of Figures 2, 3, 4 and 5, which flange is It is carried out by mechanical means, which is displaced towards the interior of the container as shown in Figures 2 and 3 or towards its exterior as shown in Figures 4 and 5, so that the marginal area (9) of said rim proximates to its free edge (6), it is fixed by mechanical union to the initial area of the flange.
- Figures 4 and 5 show respective embodiments in which the rim is in the can outside the welding area of the sheet, for example, in figure 4, this rim is raised, being able to even form an area of easy stacking of these containers, leaving the rim uncovered out of any contact with the inside of the container.
- Figure 5 shows another embodiment of the flange, but already hidden at the bottom forming a flat sealing surface of the closure sheet.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Containers Opened By Tearing Frangible Portions (AREA)
- Closures For Containers (AREA)
Abstract
Description
CIERRE PARA LATAS CLOSURE FOR CANS
© E 8 C K I P C I O N© E 8 C K I P C I O N
OBJETO DE LA INVENCIÓNOBJECT OF THE INVENTION
La presente invención se refiere a un cierre para latas, en especial para latas de conservas, concretamente del tipo de los que la tapa de la lata se materializa en un marco, fijable al cuerpo de la misma o monopieza con á, determinante de una amplia embocadura que se cierra mediante una lámina desprendible.The present invention refers to a closure for cans, especially for canning cans, specifically of the type in which the lid of the can is materialized in a frame, fixable to the body of the can or single piece with á, determining a wide mouthpiece that is closed by a removable sheet.
El objeto de la invención es conseguir una máxima simplificación en los medios de fijación de la lámina al marco y una perfecta protección de los mismos tanto frente a los efectos en el tiempo del propio contenido de la lata como del ambiente exterior que la rodea, y todo ello con total ausencia de riesgo para el usuario durante la manipulación de apertura de la lata.The object of the invention is to achieve maximum simplification in the means of fixing the sheet to the frame and perfect protection thereof both against the effects over time of the contents of the can itself and of the external environment that surrounds it, and all this with total absence of risk for the user during the opening manipulation of the can.
ANTECEDENTES DE LA INVENCIÓNBACKGROUND OF THE INVENTION
Como es sabido, las latas de conserva convencionales están estructuradas mediante un cuerpo, a base de una chapa metálica convenientemente tratada tanto exterior como interiormente, cuerpo que puede adoptar una configuración prismática, cilindrica u otras, y que en cualquier caso y tras su llenado recibe por su embocadura a una tapa de cierre, tambiái metálica, de caracterí sticas similares, que se rebordea mecánicamente sobre la citada embocadura determinando, además de un cierre estanco, un reborde perimetral utilizable en la posterior maniobra de apertura o un medio de apoyo para el clásico abrelatas.As is known, conventional canning cans are structured by a body, based on a metal sheet suitably treated both externally and internally, a body that can adopt a prismatic, cylindrical or other configuration, and which in any case and after filling receives due to its opening to a closing cap, also metallic, of similar characteristics, which is mechanically flanged on the The aforementioned mouthpiece determines, in addition to a watertight closure, a perimeter rim usable in the subsequent opening maneuver or a support means for the classic can opener.
Al objeto de facilitar la maniobra de apertura por parte de los consumidores, las citadas latas convencionales vienen siendo sustituidas, cada vez con mayor intensidad, por las que incorporan un sistema comúnmente denominados "abre-fácü" en las que la tapa está dotada, en las proximidades del citado reborde perimetral, de un troquelado determinante de una lí nea de debilitamiento que permite una apertura por rasgado, a cuyo efecto el sector desprendible de la tapa lleva asociada una anilla, utilizable primeramente como medio iniciador del corte e inmediatamente a continuación como tirador para rasgado del mismo.In order to facilitate the opening maneuver by consumers, the aforementioned conventional cans have been replaced, with increasing intensity, by those that incorporate a system commonly called "easy-open" in which the lid is provided, in the proximities of the aforementioned perimeter rim, of a die-cut determining a line of weakening that allows a tear opening, for which purpose the detachable sector of the cover is associated with a ring, first usable as a means of initiating the cut and immediately afterwards as ripping handle.
Esta solución facilita de forma muy considerable la maniobra de apertura de la lata, frente al sistema clásico del "abrelatas", pero sin embargo, supone un riesgo considerable de que durante la maniobra de apertura puedan producirse cortes en las manos del usuario, por lo que la tendencia más actual se dirige hacia la estructuración de cierres en los que la tapa se materializa en un marco perimetral al que se fija, generalmente por termosoldadura, una lámina desprendible que, por su propia naturaleza, no puede suponer daños para el usuario.This solution greatly facilitates the can opening maneuver, compared to the classic "can opener" system, but nevertheless, it poses a considerable risk that during the opening maneuver cuts may occur in the user's hands, therefore that the most current trend is towards the structuring of closures in which the cover materializes in a perimeter frame to which a removable sheet is attached, generally by heat welding, which, by its very nature, cannot cause damage to the user.
El problema que presenta esta solución es que el borde interno y recortado del anillo configurado por el citado marco, al no estar recubierto por barniz, es susceptible de oxidación por contacto con el contenido de la lata, oxidación que producirí a una contaminación de dicho contenido. Algunas patentes han intentado solucionar este problema mediante el rebordeado, rizado o repliegue del borde recortado, de forma que se evite el contacto con el contenido de la lata y se impida su oxidación.The problem presented by this solution is that the inner and cut edge of the ring configured by the aforementioned frame, since it is not covered by varnish, is susceptible to oxidation by contact with the contents of the can, oxidation that will lead to contamination of said content . Some patents have attempted to solve this problem by flanging, curling, or folding the trimmed edge so that contact with the can contents is avoided and oxidation is prevented.
En este sentido cabe citar la patente de europea EP 0 408 268 en la que el borde interno y recortado del anillo configurado por el citado marco, se le rebordea hacia el exterior.In this sense, it is worth mentioning the European patent EP 0 408 268 in which the internal and cut-off edge of the ring configured by the aforementioned frame is flanged towards the outside.
Sin embargo, esta solución plantea algunos problemas. Por un lado, el rebordeado o rizado del borde del anillo tal como se plantea en la citada patente supone un riesgo para el consumidor una vez abierto el envase, ya que dicho borde queda desprotegido y con riesgo de producir cortes.However, this solution poses some problems. On the one hand, the beading or curling of the edge of the ring as set out in the aforementioned patent represents a risk for the consumer once the package is opened, since said edge is unprotected and at risk of causing cuts.
Por otro lado, en dicha patente se plantea la existencia de una doble zona de sellado de la pieza de cerrado del envase, de manera que las dos caras de la hoja que conforma el marco o anillo deben ser de un recubrimiento plástico para el termosellado, lo que encarece de forma considerable el precio del producto y, además, empeora las propiedades mecánicas para la apertura fácil de envase. Además, las dos zonas en las que hay que aplicar termosellados, tienen espesores distintos, concretamente doble en una que en otra, debiendo adecuarse el proceso a la zona de mayor espesor, que requiere de una temperatura más elevada y que ralentiza el proceso, peligrando la seguridad microbiana del producto. Por otro lado, el efecto del termosellado aplasta en principio el rizo y, a la larga, puede producir un efecto rebote modificando ambas circunstancias el nivel de ambos sellados y, como consecuencia, el nivel de cierre del envase. Es de señalar tambiéi que el termosellado doble no sólo hace más dificultosa la apertura del envase sino que puede llegarse a la rotura por quebrado de la tapa o incluso al vertido del lí quido de gobierno durante la operación de apertura.On the other hand, in said patent the existence of a double sealing area of the closing part of the container is proposed, so that the two sides of the sheet that makes up the frame or ring must be of a plastic coating for heat sealing, which considerably increases the price of the product and, in addition, worsens the mechanical properties for easy opening of the container. In addition, the two areas in which heat sealing must be applied have different thicknesses, specifically double in one than in the other, and the process must be adapted to the thickest area, which requires a higher temperature and slows down the process, endangering the microbial safety of the product. On the other hand, the effect of heat sealing initially crushes the curl and, in the long run, can produce a rebound effect, modifying both the level of both seals and, consequently, the level of closure of the container. It is also worth noting that the double heat sealing not only makes it more difficult to open the container, but it can even lead to breakage due to the lid being broken or even spilling. Government liquid during the opening operation.
Otra solución es la que recoge la patente española ES 2 029 432, en la que el marco o anillo se configura como prolongación monopieza del cuerpo de la lata y en la que el borde queda oculto mediante una disposición del cuerpo de la lata en capas realizada mediante un doblado del mismo hacia el interior. Sin embargo, esta disposición del cuerpo de la lata es difí cil de realizar e implica un troquel muy complejo. Además, la disposición en capas propuesta por esta patente obliga a la lata a una posición muy forzada que puede producir igualmente un efecto "rebote" como consecuencia del termosellado a aplicar en la zona, haciendo que las distintas capas se separen entre sí y el borde quede desprotegido, con el consiguiente riesgo para el usuario de la lata y peligro de oxidación del producto contenido en la misma.Another solution is the one contained in the Spanish patent ES 2 029 432, in which the frame or ring is configured as a one-piece extension of the can body and in which the edge is hidden by means of a layered can body arrangement by folding it inwards. However, this arrangement of the can body is difficult to carry out and involves a very complex die. In addition, the layered arrangement proposed by this patent forces the can to a very forced position that can also produce a "rebound" effect as a result of the heat sealing to be applied in the area, causing the different layers to separate from each other and the edge remains unprotected, with the consequent risk for the user of the can and danger of oxidation of the product contained in it.
Por otra parte, las soluciones aportadas hasta ahora no permiten la utilización de materiales diferentes en el cuerpo y en la tapa o lámina, por cuanto, si ambos materiales fueran diferentes, al entrar en contacto el borde interno y recortado con la lámina desprendible se producirí a con el tiempo una corrosión galvánica que provocarí a la prematura destrucción de la tapa de cierre del envase.On the other hand, the solutions provided up to now do not allow the use of different materials in the body and in the cover or sheet, since, if both materials were different, when the internal edge comes into contact and cut with the removable sheet, Over time, galvanic corrosion will lead to the premature destruction of the container's closing cap.
DESCRIPCIÓN DE LA INVENCIÓNDESCRIPTION OF THE INVENTION
El cierre para latas que la invención propone resuelve de forma plenamente satisfactoria la problemática anteriormente expuesta, en los diferentes aspectos comentados. Para ello, a partir de un cuerpo de cualquier configuración, a base de chapa metálica, rematado a nivel de su embocadura en una pestaña perimetral interna a la que se fija por termosoldadura una lámina, la invención se centra en el hecho de que la citada pestaña presenta su zona marginal, interna o externa, rebordeada o replegada por medios mecánicos, determinando un rizo o reborde sensiblemente cilindrico, de manera que la zona marginal de dicho reborde próxima a su borde libre, se fija mediante unión mecánica a la zona inicial del reborde, produciendo un cierre mecánico por contacto entre ambas superficies y ocultando y protegiendo de esta forma al borde libre e iniciahnente cortante del cuerpo.The closure for cans that the invention proposes solves in a fully satisfactory way the problems previously exposed, in the different aspects discussed. For this, starting from a body of any configuration, based on sheet metal, finished at the level of its mouth on an internal perimeter flange to which a sheet is heat-welded, the invention focuses on the fact that the aforementioned flange presents its marginal zone, internal or external, flanged or folded by mechanical means, determining a substantially cylindrical curl or flange, so that the marginal zone of said flange close to its free edge is fixed by mechanical union to the initial zone of the flange, producing a mechanical closure by contact between both surfaces and thus hiding and protecting the free and initially cutting edge of the body.
La configuración del rizo que plantea la invención, en la que el rizo o reborde queda a un nivel inferior que el resto de la pestaña o en el exterior de la lata, permite que la lámina se fije por termosoldadura a la pestaña en el sector plano y mayoritario de la misma a través de una línea perimetral de fijación única, que facilita el desprendimiento de la lámina durante la apertura, sin necesidad de que exista otra línea de termosoldadura por dentro del citado rizo o reborde.The configuration of the curl proposed by the invention, in which the curl or flange is at a lower level than the rest of the flange or on the outside of the can, allows the sheet to be heat-fixed to the flange in the flat sector and the majority of it through a unique fixing perimeter line, which facilitates the detachment of the sheet during opening, without the need for another heat-sealing line inside the aforementioned curl or rim.
Por otra parte, esta protección mecánica del borde interno del envase y, su no contacto con la lámina, evitan el efecto corrosivo galvánico asociado al empleo de diferentes metales unidos entre sí , lo que permite la utilización de distintos materiales para la tapa y el envase, que hasta ahora no era posible.On the other hand, this mechanical protection of the inner edge of the container and its non-contact with the foil, prevent the galvanic corrosive effect associated with the use of different metals bonded together, allowing the use of different materials for the lid and the container , which until now was not possible.
De acuerdo con otra de las caracterí sticas de la invención se ha previsto que la fijación de la lámina constitutiva de la tapa se realice por termosoldadura sobre el anillo o pestaña perimetral interna del cuerpo en el sector plano y mayoritario de dicha pestaña sin que el reborde interno se vea así afectado por dicha unión.In accordance with another of the characteristics of the invention, it has been provided that the fixing of the sheet constituting the cover is carried out by heat welding on the ring or internal perimeter flange of the body in the flat and majority sector of said flange without the internal rim being thus affected by said union.
ESCMPCION DE LOS EBUJOSSCMPTION OF THE EBUJOS
Para complementar la descripción que se está realizando y con objeto de ayudar a una mejor comprensión de las caracterí sticas del invento, de acuerdo con un ejemplo preferente de realización práctica del mismo, se acompaña como parte integrante de dicha descripción, un juego de dibujos en donde con carácter ilustrativo y no limitativo, se ha representado lo siguiente:To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical embodiment thereof, a set of drawings is included as an integral part of said description. where, by way of illustration and not limitation, the following has been represented:
La figura 1.- Muestra una vista en perspectiva de una lata provista del cierre que constituye el objeto de la presente invención, de acuerdo con un ejemplo clásico de realización práctica para dicha lata en el que ésta adopta una configuración tendente al prisma rectangular.Figure 1.- Shows a perspective view of a can provided with the closure that constitutes the object of the present invention, in accordance with a classic example of practical embodiment for said can in which it adopts a configuration aimed at the rectangular prism.
La figura 2.- Muestra un detalle ampliado y en sección de la lata de la figura anterior, a nivel de su embocadura y según una primera realización de la invención.Figure 2.- Shows an enlarged detail and in section of the can of the previous figure, at the level of its mouth and according to a first embodiment of the invention.
La figura 3.- Muestra una sección similar a la figura anterior, pero correspondiente a una segunda realización de la invención.Figure 3.- Shows a section similar to the previous figure, but corresponding to a second embodiment of the invention.
La figura 4.- Muestra una tercera realización en la cual el cierre queda entre el repliegue exterior y el contenido de la lata.Figure 4.- Shows a third embodiment in which the closure is between the outer fold and the contents of the can.
La figura 5.- Muestra una cuarta realización en la que el repliegue queda por debajo de manera oculta al borde de la lata.Figure 5.- Shows a fourth embodiment in which the folding it is hidden below the edge of the can.
IDEALIZACIÓN PREFERENTE BE LA INVENCIÓNPREFERRED IDEALIZATION BE THE INVENTION
A la vista de las figuras reseñadas puede observarse como el cierre que se preconiza es aplicable a latas de conserva obtenidas a base de una chapa metálica convenientemente tratada, tanto interior como exteriormente, para soportar tanto los efectos medioambientales externos como los derivados de su propio contenido, lata que en el ejemplo de realización práctica elegido adopta una configuración prismática, como se ha dicho con anterioridad, pero que igualmente podrí a ser cilindrica, de planta elíptica o de cualquier otra configuración, chapa metálica que configura un cuerpo (1) abierto superiormente, rematándose dicho cuerpo (1) en un marco perimetral (2) que se fija a la embocadura del citado cuerpo (1) por el sistema convencional de rebordeado, tal como muestra la figura 2, marco en el que se define una pestaña perimetral interna (3), preferentemente incluida en un imaginario plano horizontal, a la que se fija por termosoldadura, mediante adhesivo o por cualquier otro medio adecuado una lámina (4) que constituye la tapa propiamente dicha y que puede estar obtenida mediante un complejo clásico a base de una lámina metálica revestida interiormente por una lámina plástica.In view of the figures outlined, it can be seen how the closure that is recommended is applicable to canning cans obtained from a metal sheet suitably treated, both internally and externally, to withstand both external environmental effects and those derived from its own content. , can that in the chosen practical embodiment example adopts a prismatic configuration, as previously mentioned, but which could also be cylindrical, elliptical in shape or any other configuration, sheet metal that forms a body (1) open superiorly said body (1) being finished off in a perimeter frame (2) that is fixed to the mouth of said body (1) by the conventional flanging system, as shown in Figure 2, a frame in which an internal perimeter flange is defined (3), preferably included in an imaginary horizontal plane, to which it is fixed by heat welding, by adhesive or by any other m suitable means is a sheet (4) that constitutes the cover itself and which can be obtained by means of a classic complex based on a metal sheet lined internally by a plastic sheet.
No obstante y como se observa en las figuras 3, 4 y 5, la tapa puede carecer del citado marco (2) como pieza fí sicamente independiente del cuerpo (1), de manera que la pestaña (3') se obtiene a partir de propio cuerpoHowever, and as seen in Figures 3, 4 and 5, the cover may lack the aforementioned frame (2) as a physically independent part of the body (1), so that the flange (3 ') is obtained from own body
(1) de la lata, mediante replegado de su embocadura, fijándose como en el caso anterior a esta pestaña (3') la citada lámina (4). En ambos casos, la lámina (4) puede estar dotada igualmente de una lengüeta (5) de fraccionado manual, que constituye un asidero utilizable en la maniobra de apertura.(1) of the can, by folding its mouth, fixing the aforementioned sheet (4) as in the previous case to this flange (3 '). In both cases, the sheet (4) can also be provided with a tab (5) for manual fractionation, which constitutes a handle that can be used in the opening maneuver.
De acuerdo ya con la invención y para proteger el borde (6) definido durante el troquelado de la pestaña (3-3'), que obviamente no está afectado ni por el barniz de revestimiento interior de la chapa ni por el de revestimiento exterior, se ha previsto que dicha pestaña (3-3') incorpore en su zona marginal interna un repliegue (7) o reborde interno, sensiblemente cili ndrico, como se observa en cualquiera de las figuras 2, 3, 4 y 5, reborde que se lleva a cabo por medios mecánicos, que queda desplazado hacia el interior del envase como muestran las figuras 2 y 3 o hacia su exterior tal y como muestra en las figuras 4 y 5, de manera que la zona marginal (9) de dicho reborde próxima a su borde libre (6), se fija mediante unión mecánica a la zona inicial del reborde.In accordance with the invention and to protect the edge (6) defined during the stamping of the flange (3-3 '), which is obviously not affected by either the interior coating of the sheet or the exterior coating, It is provided that said flange (3-3 ') incorporates in its internal marginal zone a recess (7) or internal flange, substantially cylindrical, as seen in any of Figures 2, 3, 4 and 5, which flange is It is carried out by mechanical means, which is displaced towards the interior of the container as shown in Figures 2 and 3 or towards its exterior as shown in Figures 4 and 5, so that the marginal area (9) of said rim proximates to its free edge (6), it is fixed by mechanical union to the initial area of the flange.
Con esta realización, se evita el contacto del metal del borde del cuerpo o del marco perimetral desprotegido con la lámina de cierre y con ello se evita la corrosión galvánica de la lámina de cierre y la destrucción prematura del envase y de su contenido.With this embodiment, the metal contact of the body edge or the unprotected perimeter frame with the closure foil is avoided and thus the galvanic corrosion of the closure foil and the premature destruction of the container and its contents are avoided.
En la posterior fijación por termosoldadura de la lámina (4), ésta se fija exclusivamente en la zona plana (8) de la pestaña (3-3'), al quedar el reborde en un plano más bajo que la pestaña, lo que facilita de forma muy considerable el proceso de termosoldadura y la posterior maniobra de desprendimiento de la lámina (4).In the subsequent fixing by heat sealing of the sheet (4), it is fixed exclusively in the flat area (8) of the flange (3-3 '), as the flange is lower than the flange, which facilitates in a very considerable way, the heat-welding process and the subsequent sheet detachment maneuver (4).
Las figuras 4 y 5 muestran sendas realizaciones en las cuales el reborde queda en la lata por fuera de la zona de soldadura de la lámina, así por ejemplo, en la figura 4, este reborde queda elevado, pudiendo formar incluso una zona de fácil apilado de estos envases, quedando el reborde descubierto fuera de cualquier contacto con el interior del envase.Figures 4 and 5 show respective embodiments in which the rim is in the can outside the welding area of the sheet, for example, in figure 4, this rim is raised, being able to even form an area of easy stacking of these containers, leaving the rim uncovered out of any contact with the inside of the container.
La figura 5 muestra otra realización del reborde, pero ya oculto en la parte inferior formando una superficie plana de sellado de la lámina de cierre. Figure 5 shows another embodiment of the flange, but already hidden at the bottom forming a flat sealing surface of the closure sheet.
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP04725951A EP1626008B1 (en) | 2003-04-08 | 2004-04-06 | Closure for tins |
| DE602004028360T DE602004028360D1 (en) | 2003-04-08 | 2004-04-06 | CAN CLOSURE |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES200300827A ES2246634B1 (en) | 2003-04-08 | 2003-04-08 | CLOSURE FOR CAN. |
| ESP200300827 | 2003-04-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004089769A1 true WO2004089769A1 (en) | 2004-10-21 |
Family
ID=33155451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/ES2004/000155 Ceased WO2004089769A1 (en) | 2003-04-08 | 2004-04-06 | Closure for tins |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1626008B1 (en) |
| DE (1) | DE602004028360D1 (en) |
| ES (1) | ES2246634B1 (en) |
| PE (1) | PE20040967A1 (en) |
| WO (1) | WO2004089769A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH709571A1 (en) * | 2014-04-29 | 2015-10-30 | Soudronic Ag | Method and apparatus for the production of tear-open and a tear-open lid. |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH413718A (en) * | 1963-07-10 | 1966-05-15 | Indive Gmbh | Packaging tray, in particular for food |
| US4211338A (en) * | 1979-05-08 | 1980-07-08 | Reynolds Metals Company | Container closure structure |
| US4438850A (en) * | 1982-07-15 | 1984-03-27 | Reynolds Metals Company | Membrane closure structure |
| US4540105A (en) * | 1984-08-13 | 1985-09-10 | General Can Company, Inc. | Closure opening having protective bead |
| DE9203953U1 (en) * | 1992-03-24 | 1992-07-23 | Alcan Rorschach Ag, Rorschach | Lids for cans or similar containers |
| NL1013957C2 (en) * | 1999-12-24 | 2001-06-26 | Impress Metal Packaging Bv | Tamper-proof, re-sealable closure for plastic container has lid with ring-pull protected by frangible seal |
| WO2002079041A1 (en) * | 2001-03-29 | 2002-10-10 | Industrias Alimentarias De Navarra, S.A. | Closure means for cans, especially preserved food cans |
-
2003
- 2003-04-08 ES ES200300827A patent/ES2246634B1/en not_active Expired - Fee Related
-
2004
- 2004-04-06 EP EP04725951A patent/EP1626008B1/en not_active Revoked
- 2004-04-06 WO PCT/ES2004/000155 patent/WO2004089769A1/en not_active Ceased
- 2004-04-06 DE DE602004028360T patent/DE602004028360D1/en not_active Expired - Lifetime
- 2004-04-07 PE PE2004000359A patent/PE20040967A1/en active IP Right Grant
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH413718A (en) * | 1963-07-10 | 1966-05-15 | Indive Gmbh | Packaging tray, in particular for food |
| US4211338A (en) * | 1979-05-08 | 1980-07-08 | Reynolds Metals Company | Container closure structure |
| US4438850A (en) * | 1982-07-15 | 1984-03-27 | Reynolds Metals Company | Membrane closure structure |
| US4540105A (en) * | 1984-08-13 | 1985-09-10 | General Can Company, Inc. | Closure opening having protective bead |
| DE9203953U1 (en) * | 1992-03-24 | 1992-07-23 | Alcan Rorschach Ag, Rorschach | Lids for cans or similar containers |
| NL1013957C2 (en) * | 1999-12-24 | 2001-06-26 | Impress Metal Packaging Bv | Tamper-proof, re-sealable closure for plastic container has lid with ring-pull protected by frangible seal |
| WO2002079041A1 (en) * | 2001-03-29 | 2002-10-10 | Industrias Alimentarias De Navarra, S.A. | Closure means for cans, especially preserved food cans |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1626008A1 (en) | 2006-02-15 |
| DE602004028360D1 (en) | 2010-09-09 |
| ES2246634B1 (en) | 2007-04-16 |
| EP1626008B1 (en) | 2010-07-28 |
| PE20040967A1 (en) | 2004-12-11 |
| ES2246634A1 (en) | 2006-02-16 |
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