DE102013015581B3 - Sealing disk for induction sealing of a container - Google Patents

Sealing disk for induction sealing of a container

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Publication number
DE102013015581B3
DE102013015581B3 DE201310015581 DE102013015581A DE102013015581B3 DE 102013015581 B3 DE102013015581 B3 DE 102013015581B3 DE 201310015581 DE201310015581 DE 201310015581 DE 102013015581 A DE102013015581 A DE 102013015581A DE 102013015581 B3 DE102013015581 B3 DE 102013015581B3
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DE
Germany
Prior art keywords
sealing
sealing disc
layer
container
film
Prior art date
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Active
Application number
DE201310015581
Other languages
German (de)
Inventor
Heinz-Werner Rohrka
Rainer Kröger
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.)
ALFELDER KUNSTSTOFFW MEYER H
Alfelder Kunststoffwerke Herm Meyer GmbH
Original Assignee
ALFELDER KUNSTSTOFFW MEYER H
Alfelder Kunststoffwerke Herm Meyer GmbH
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 ALFELDER KUNSTSTOFFW MEYER H, Alfelder Kunststoffwerke Herm Meyer GmbH filed Critical ALFELDER KUNSTSTOFFW MEYER H
Priority to DE201310015581 priority Critical patent/DE102013015581B3/en
Application granted granted Critical
Publication of DE102013015581B3 publication Critical patent/DE102013015581B3/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D51/00Closures not otherwise provided for
    • B65D51/18Arrangements of closures with protective outer cap-like covers or of two or more co-operating closures
    • B65D51/20Caps, lids, or covers co-operating with an inner closure arranged to be opened by piercing, cutting, or tearing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D77/00Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10Container closures formed after filling
    • B65D77/20Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024Container 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
    • B65D77/2028Means for opening the cover other than, or in addition to, a pull tab
    • B65D77/2032Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container
    • B65D77/2064Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container the seal being locally weakened, e.g. by using a sealing inhibitor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D2251/00Details relating to container closures
    • B65D2251/0003Two or more closures
    • B65D2251/0006Upper closure
    • B65D2251/0015Upper closure of the 41-type
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D2251/00Details relating to container closures
    • B65D2251/0003Two or more closures
    • B65D2251/0068Lower closure
    • B65D2251/0093Membrane

Abstract

A sealing disc (10) for closing mouths of containers (5) has a rim (11) which fits to an edge of the mouth. A foil (20) serves for inductive coupling of heat into the sealing disc (10). A sealing layer (25) on the inside of the container (5) facing the side of the film (20) is used for sealing sealing the sealing disc (10) on the edge of the mouth of the container (5). One or more layers (30) are arranged on the side of the film (20) facing away from the sealing layer (25). A part of the sealing disc (10) is designed as a handle (35) for opening the mouth of the container (5) closed by the sealing disc (10). At least one of the layers (30) is provided on the side of the film (20) facing away from the sealing layer (25) with lines of weakness (36) for forming an outline of the handle (35). At least one of the weakening lines (36) leads from a starting point (12) on the edge (11) of the sealing disc (10) in the direction of the center of the sealing disc (10). A surface portion (37) is constructed adjacent to the lines of weakness (36) so that between two of the layers (30) or between the film (20) and the bottom of the layers (30) is disposed a layer having an adhesion-reduced deposit (31) ,

Description

  • The invention relates to a sealing disc for closing of mouths of containers, wherein the mouth has an edge and the sealing disc has a matching edge, with a film for the inductive coupling of heat in the sealing disc, with a sealing layer on the inside of the container zuwendenenden Side of the film for sealing sealing of the sealing disc on the edge of the mouth of the container, with several layers on the side facing away from the sealing layer side of the film, with an adhesive layer between two of the layers and with a formed as part of the sealing disc handle for opening the mouth of with the sealing disc closed container, wherein at least one of the layers is provided on the side facing away from the sealing layer side of the film with a dividing line for forming an outline of the handle.
  • Containers are used to hold content, for example, to receive drinks or powdered foods or other substances. The containers have on their top an opening or mouth. Often it is desired or even necessary to close this container mouth with a disc-shaped seal, which closes the contents tightly against external influences.
  • From the DE 601 04 058 T2 a lid member for containers is known, which has a grip tab. The pull tab can be pulled to pull the lid member off the container.
  • In the EP 1 842 792 A1 a membrane for winding containers will be described. A grip tab is provided which rests on an adhesive-free area. The grip tab can be grasped and pulled by the user.
  • Already from the DE 91 08 868 U1 For example, a sealing disc is known for closing a container, which can be fixed by induction sealing on the opening edge of the container. The sealing disc has for this purpose a metal foil. On the underside of the metal foil, ie on the side adjacent to the opening edge, a very thin plastic film is applied. It is now possible to attach this film firmly on the top edge by means of induction sealing. If eddy current is induced in the metal foil from above, it is heated accordingly, as well as the underlying, thereby melting plastic film. This also applies to the upper edge of the container, for example a plastic cup. The result is a relatively firm connection of the plastic film with the upper edge of the cup. The entire mouth area is then covered with a screw cap, which mechanically protects the sealing washer and the mouth area.
  • The user must, so he comes to the contents of the still sealed with the sealed sealing disc container, remove the gasket in a suitable form of the mouth. For this purpose, there are various used in practice operations that facilitate this process.
  • From the DE 10 2007 014 084 B3 for example, an outwardly projecting gripping bottle is known. This projects beyond the opening edge of the container. The user can attack on this pull tab, pull it up and then remove the gasket in one go.
  • This concept is widely used and has also proven itself. The disadvantage is that the outwardly projecting beyond the radius of the mouth of the container handle latch before the only time at which it is needed and used, as possible must be accommodated so that it is not itself damaged on the one hand and then no longer meet their purpose can, and that on the other hand does not interfere with the closing process. It should be remembered that often a screw cap on the outside and on the mouth of the container must be screwed and outwardly projecting sealing flaps must then be designed so that they do not fall into the screw and either affect the tightness or even attacked by the thread become. There are possibilities, but sometimes require a complicated adaptation of the screw cap or as in the EP 2 045 194 B1 require a complicated folding this tab into the interior of the gasket between other layers.
  • Another idea is, as in the EP 1 472 153 B1 or the DE 199 20 572 A1 form the uppermost layer of the sealing disc so that it forms a kind of upwardly projecting fold, on which then a user can attack to pull off the entire sealing disc upwards.
  • This concept, which has also been widely used, has the disadvantage that the uppermost layer either can not be adhesively bonded to the underlying layer or can be fastened to it, so that a loose, upwardly projecting and palpable fold actually results, or the uppermost layer can be removed from the outset formed by additional material so that it forms with this additional material an upwardly projecting and again on the foot of the fold returning layer.
  • In both cases, the problem arises that this then loosely upwardly projecting fold is sensitive to rotational movements of the screw cap thereon and measures must be taken to protect the fold despite their loose resting on the underlying layers against damage. In addition, the formation of such wrinkles over portions of the surface of the sealing disc is not a problem and therefore expensive.
  • If one refrains from an upwardly projecting fold or an outwardly projecting tab, thus giving the user no handle to open, he must try to destroy the sealing disc with a knife or other object or if necessary with his fingers and force in order to To get content. This is often unappetizing for the user and leads to the spilling of the container contents, since these opening operations are then uncoordinated and difficult to predict for the manufacturer of the corresponding product.
  • From the DE 10 2012 006 934 B3 Now the idea is known to provide lines of weakness on the top of the sealing disc, which form an outline of a handle. At least one of the lines of weakness leads from the edge of the mouth in the direction of the center of the sealing disc. This makes it possible to provide the user with a handle available without upwardly erect or erected folds or outwardly projecting or unfoldable tabs must be provided. However, the user is no longer forced to destroy the sealing disc with a knife or other object or, if necessary, with his fingers and force in order to get to the contents of the container. This often unappetizing for the user and leading to spill the container contents operations can be avoided.
  • After unscrewing the screw cap, the user looks directly at the top of the sealing disc and looks at a perforation, which can also be highlighted in color. The user pierces in this conception now the sealing washer in the region of the handle, which is also possible due to the weakening line or the perforation. The behavior of the sealing disc is very predictable both for the user as well as for the bottler of the container contents.
  • Nevertheless, this concept leaves nothing to be desired. For example, piercing the gasket is a process that still requires a metered amount of force and may cause clumsy users to get their finger into the container, even though they did not intend it at the time.
  • The object of the invention is therefore to propose a sealing disc, which on the one hand manages without wrinkles and projecting tabs, but also has the additional advantage of being able to better avoid unintentional penetration of the user's fingers into the container interior below the sealing disc during the opening process.
  • This object is achieved in a generic sealing disc in that a surface portion adjacent to the dividing line is constructed so that the adhesive layer in this surface portion has a reduced bond strength or omitted or is covered with a layer with a reduced adhesion order, and that the dividing line Part of the surface partially surrounds to form a tab-shaped handle.
  • By providing a certain surface portion with an adhesion-reduced coating, it becomes possible to make the region adjacent to the parting line not only as in FIG DE 10 2012 006 934 B3 to push inwardly into the container by exerting force on the perforations or other lines of weakness, but by creating here an attack area for a train of a small area section upwards.
  • The user can now attack at the dividing line and pull up on the film or the lower layers fixed and fixed surface portion up. Once the user has a small area section in his hand, he can then pull the entire area of the not completely framed by the dividing line surface upwards, since the dividing line allow an upward lifting.
  • In this way, the user has after this lifting the entire area between the preferred convex dividing line in the hand.
  • With the aid of the tab-like handle thus formed, the user can now easily and easily transfer force to the sealing disc, without piercing it and having to penetrate into the container. The user can transfer this force with the help of his thumb and his forefinger or other fingers on the tab-like handle and pull on this.
  • This tensile force can now be used for removing the sealing disc from the mouth of the container.
  • In a preferred embodiment, a high bond strength between the outer film is now out of the range of tab-like handle and the induction film used for induction sealing and the sealing layer attached thereto provided. In this case, the bond strength is higher than the adhesion of the sealant layer to the mouth of the container.
  • This results in the application of further tensile force by the user leads to the tab-like handle that the train of the tab-like handle on the firmly associated with this tab-like handle remaining surface areas of the associated layer and the high adhesion to her attached induction film is transmitted and so that the entire sealing disc is released by loosening the thus peelable sealing layer of the mouth of the container.
  • In this case, the user can pull the tab-like handle either in one direction, which corresponds to a further mounting of the tab-like handle, or even exactly perpendicular to apply the force in a plane corresponding to the vertically erected tab-like handle.
  • In another embodiment, with a particularly tight sealing layer, the sealing disc is not completely withdrawn, but raised by the provision of lines of weakness between the ends of the dividing line and the edge of the mouth of the container so that there is a defined partial opening of the sealing disc on the container mouth.
  • The container mouth is opened to a considerable extent and can then be used as access or for dumping.
  • Three different variants are basically possible for the construction of the sealing disc according to the invention. An adhesive layer is modified. This is in particular the adhesive layer, which acts as a laminating adhesive if the film used for the induction of the sealing disc is to be laminated with those layers which are located on the side facing away from the sealing layer side of the inserted film for induction.
  • The modification of this adhesive layer can take place in that the surface area remains free of the adhesive layer which is adjacent to the dividing line.
  • This free sticking can be achieved by first printing the adhesive layer used for laminating in a corresponding surface pattern on either the film used for induction or on the film to be laminated with it. Since the surface pattern is known in advance, the pressure roller can be equipped accordingly.
  • A similar form can be used if the adhesive layer is not to be completely omitted, but if certain portions are to be provided with an adhesive layer which exerts only a reduced adhesive force.
  • As a third alternative, a release coating is applied in addition to a preferably full-surface adhesive layer.
  • This separating varnish could be applied, for example, in counterpressure to the polyethylene terephthalan film or in another embodiment also in straight printing on the film used for the induction (in particular an aluminum foil). The application of this release coating could be done for example in the so-called flexographic printing process or else in the gravure printing process.
  • After then the film used for induction has been laminated together with the overlying layers, in this embodiment, the release coating can exert its release effect on the adhesive layer, in particular the Kaschierklebeschicht, and thus allow the simplified removal of this surface area.
  • It is particularly preferred for the adhesion-reduced coating to be a non-stick coating, in particular a polyamide coating or a polyester coating. As a result, a particularly advantageous production and reliable use of this surface portion during the tearing process is possible.
  • Technically, it has proven useful if the application has an application rate of more than 1.0 g / m 2 and less than 2 g / m 2 , in particular more than 1.3 g / m 2 and less than 1.5 g / m 2 is applied.
  • This release varnish has proven particularly suitable for precise separation of the layers from one another with corresponding adhesive layers.
  • The release lacquer or the non-applied and partially omitted adhesive layer, that is, the laminating adhesive not applied in a certain area section, are responsible for the fact that a tab-like handle or, more simply, an opening tab can be formed.
  • Preferably, the separation line is cut only in the outer layers of the sealing disc on the contour of this release coating or the surface area of the missing laminating adhesive with the aid of a laser. This cutting already physically creates the opening tab.
  • Depending on the shape of the tab and the desired properties of the gasket, the release coating is printed or the adhesive is not applied. The dividing line is based on the shape of the associated surface area.
  • In both said embodiments, there is no adhesion between the outer layer of the sealing disc on the one hand and the film used for induction in the inner region of the sealing disc on the other. In practice this means a lack of adhesion between the PET layer and the aluminum layer.
  • In order to offer the user a particularly good opportunity to lift off the entire part of the boundary line framed by the slight lifting of the surface portion and quasi a novel "lug" bidding surface, it is preferred if the dividing line a convex line on the surface of the gasket describes, and when the surface portion is disposed adjacent to the parting line and lies on the convex side of the parting line.
  • The dividing line can not only be particularly well recognized by the user in forming such a shape, by providing the surface portion with the tab-like handle exactly furthest from the edge and the removal process can be prepared most reliable and steady and beyond defined and the Provide users.
  • A particularly suitable shape arises when the sealing disc is circular, when the dividing line forms an isosceles triangle with a rounded tip, and when the surface portion fills the rounded tip on the convex side of the dividing line symmetrically to the bisector of the isosceles triangle.
  • A particularly preferred embodiment is characterized in that the dividing line is formed by a perforation, in particular by a lasered perforation, and when this perforation extends through all the layers on the side of the film facing away from the sealing layer, but not through the film itself ,
  • For the formation of the novel grip tab, therefore, only the side of the sealing disc viewed from the container is preferably provided with the dividing line, ie perforated in particular by means of a laser. This area is preferably a film formed from polyethylene terephthalate (PET).
  • As an alternative to a PET film, other monofilms or composite films are also possible for the side of the sealing disc which is viewed from the outside of the container. The thickness of these layers is preferably in the range between 20 .mu.m and 150 .mu.m. Besides polyethylene terephthalate (PET), oriented polypropylene (OPP), oriented polyamide (OPA) and high density polyethylene (HDPE) are also primarily considered.
  • These layers or films are then perforated together with the polyethylene terephthalate.
  • The further layers or layers below this polyethylene terephthalate film, in particular therefore the induction film and the sealing layer, are not damaged by lasering. This can be brought about, for example, by the perforation being effected by lasering through the corresponding layer composite before the sealing disk is formed by laminating the polyethylene terephthalate film with the induction film.
  • The induction process is therefore not affected.
  • In this way, a particularly strong and easy for the user tangible grip tab, with which the user can then deduct then the complete sealing disc from the mouth of the container. In order for this process to be carried out properly without tearing down portions or becoming unwieldy, a thick, comparatively stiff film, as in this embodiment of the invention, is very advantageous.
  • It is not absolutely necessary that the lug-like handle thus formed sits precisely centered on the surface of the sealing disc. Another placement can be used depending on the application and also produced. Thus, such a tab-like handle can also be arranged in the edge region of the sealing disc.
  • The sealing disc may be provided with additional customer-friendly imprints, such as pictograms or a corresponding inscription or other indications, for example along the perforation, which may help the customer understand the procedure.
  • It is also possible to color the entire tab from the surrounding area or to make the tab in color.
  • The sealing disks receive a shape corresponding to the size of the mouth of the container and are thus generally preferably round, in particular circular. They can be used by the manufacturer of the closures and the container without additional effort, since the actual positioning of the perforation relative to the container edge is irrelevant. So it does not matter where, for example, attaches a special turn of the thread and it does not have a special recess for about Lugs or folds in the container lid must be taken into account.
  • It is also irrelevant how the container itself is shaped as long as the mouth of the container is accessible to the user.
  • The sealing disc as a whole preferably has a puncture resistance of less than 30 N.
  • The side of the sealing disc opposite the container mouth is provided with sealing layers which can be adapted to the corresponding choice of material of the container. So a seal against containers made of glass as well as of different plastics (HDPE, LDPE, PP, PET or PVC) is possible. The sealing layers can be set firmly sealing or peelable and have a thickness of preferably between 3 .mu.m and 100 .mu.m.
  • The sealing layers may be extruded or laminated on the other layers of the sealing disc.
  • The induction layer or induction foil itself, which carries the sealing layer on one side and the reinforcing layer on the other side, is preferably a metal foil, in particular an aluminum foil, and has a thickness of preferably between 6 μm and 50 μm. The sealing layer can be applied to this film, for example by means of extrusion coating or lamination or painting. It is also possible to place a primer or a laminating adhesive between the layers, amounts of from 0.5 to 5 g / m 2 dry being preferred.
  • Depending on the embodiment, the dividing lines, lines of weakness and perforation lines can be introduced at different times or in different method steps; This is preferably done in the film which forms the reinforcing layer, prior to merging with the induction layer and the further layers or after the production of the layer composite from which the sealing disks are subsequently produced.
  • The sealing disks produced in this form are brought together in a web and then preferably punched.
  • Between the induction layer and the reinforcing layer provided with the dividing line, weakening line or the perforation, a further layer can be provided, in particular a foam film. For this purpose, preferably a foam film based on polyethylene or polypropylene with a thickness of preferably 15 .mu.m to 250 .mu.m has been found to be particularly practicable.
  • In a preferred embodiment it is provided that further layers are provided and designed such that they seal the mouth of the container after removing the film and re-laying the layers.
  • This additional element forms a so-called reseal part. It may in particular have a cardboard or a foam sheet. The carton or foam sheet may be coated or laminated on one or both sides with a plastic film such as polyethylene terephthalate (PET), oriented polypropylene film (OPP), high density polyethylene (HDPE) or low density polyethylene (LDPE) films. Also possible is a coating with paper or cardboard.
  • These reseal parts offer the possibility that the user after initial opening by lifting and pulling the tab-like handle and the removal of parts or the entire sealing disc can still make a closure of the container in which he screwed the cap with the remaining reseal - Part screwed again. As a result, at least a temporary tight closure is possible again.
  • This so-called reseal part can be connected by means of a wax lamination or an extrusion lamination with the reinforcing layers or the release lacquer thereon and then dissolves only when first screwing the screw cap.
  • In other embodiments, no connection of this Reseal part is provided with the underlying layers from the outset, so that it is then a two-piece sealing disc.
  • Further preferred features can be found in the dependent claims and the description of the figures.
  • In the following an embodiment of the invention will be described in more detail with reference to the drawing. Show it:
  • 1 a perspective view of a container with a sealing washer according to the invention;
  • 2 a perspective view of a container from the 1 at an opening;
  • 3 a representation similar to the 2 at more advanced opening process;
  • 4 a plan view of an embodiment of a sealing disc;
  • 5 a schematic plan view of a sealing disc according to the invention with a first embodiment of a tab-like handle;
  • 6 a schematic plan view of a sealing disc according to the invention with a second embodiment of a tab-like handle;
  • 7 a schematic plan view of a sealing disc according to the invention with a third embodiment of a tab-like handle; and
  • 8th a schematic plan view of a sealing disc according to the invention with a fourth embodiment of a tab-like handle.
  • In the in 1 illustrated arrangement of a container 5 with a screw cap 6 and one between the mouth of the container 5 and the screw cap 6 placed sealing washer 10 it can be seen that for this gasket 10 several layers or films are arranged one above the other. The complete sealing disc 10 with a circumferential edge 11 is circular in the illustrated preferred embodiment and is applied to the opening edge of the mouth of a container 5 applied, of which one finds in particular the mouth indicated schematically.
  • The container 5 can have very different shapes. It may be made of glass or plastic or other material and is filled (not shown), for example with a drink or with a powdered food or similar materials.
  • The container 5 is with a screw cap 6 closed, which is also indicated schematically. Before the first opening is the screw cap 6 Continuously screwed tight. At the first opening, the screw cap 6 first removed by the end user in the illustrated embodiment. For this purpose he turns the screw cap 6 and remove it from the container 5 ,
  • The sealing washer 10 has as a central element in the illustrated embodiment of the sealing disc 10 a slide 20 for the inductive coupling of heat into the sealing washer 10 , This slide 20 consists of an electrically conductive material, in particular a metal, usually aluminum.
  • This slide 20 is on the mouth of the container 5 facing side with a sealing layer 25 Mistake. The sealing layer 25 So it lies on the opening edge around the mouth of the container 5 on.
  • After filling the container 5 with filling material is the entire sealing disc 10 placed on the container mouth or placed there. Then inductively into the gasket 10 and thus especially in the film 20 Heat coupled. This heat brings the entire sealing layer 25 for melting, especially where the sealing layer 25 in the area of the edge 11 the sealing disc 10 directly on the edge of the mouth of the container 5 rests. Also this mouth of the container 5 is heated.
  • The sealing layer 25 in the area of the edge 11 the sealing disc 10 Thus, in this area, it connects firmly to the upper edge of the container 5 , It is kind of sealed up.
  • On the opening edge around the mouth of the container 5 and the sealing layer 25 opposite side of the film 20 there is another layer 30 , which serves as a reinforcing layer here. This layer 30 consists for example of polyethylene terephthalate (PET), biaxially oriented polypropylene (BOPP), monoaxially oriented polypropylene (MOPP) or stretched polyamide film (OPA). It is firmly applied to the induction foil, in particular by means of lamination. For this lamination a laminating adhesive is used, which in this embodiment, an adhesive layer 32 forms. The layer 30 has one in the 1 indicated and later explained in more detail parting line 36 to form a handle 35 on.
  • Above this layer 30 you see in the 1 another layer 40 , This layer 40 is on the bottom of the screw cap 6 attached, for example, sealed, glued or mechanically clamped.
  • The screw cap 6 stops after closing the container 5 at the bottler of the contents, the entire sealing disc 10 from sealing layer 25 , Foil 20 for coupling heat, reinforcing layer 30 and additional layer 40 additionally firmly on the container 5 ,
  • At the first opening is now the screw cap 6 first time accepted. The end user is unscrewing the container 5 on. This dissolves the layer 40 together with the screw cap 6 from the container 5 with the sealant remaining thereon 25 , Foil 20 and reinforcing layer 30 because an existing adhesive layer between the layer 30 and the layer 40 the weakest Connection in the resulting composite of the sealing disc 10 is.
  • The resulting situation can be well in the 2 recognize, where in perspective already a separation of the screw cap 6 up from the tank 5 is done below. The user now looks at the top of the topmost layer, which is still on the mouth of the container 5 rests. That's the shift 30 ,
  • Here now you can see in this presentation well that on top of the layer 30 a handle 35 in a sectional form that is visible through the dividing line 36 is formed in the form of a perforation produced here by means of a laser.
  • The dividing line 36 runs in the illustrated preferred embodiment in an arc between two endpoints on the layer 30 the sealing disc 10 ,
  • Overall, a convex dividing line forms 36 out. It represents approximately an isosceles triangle, wherein the two end points form the basis of the isosceles triangle with the connecting line extending between them, while the curved portion of the dividing line 36 represents a rounded tip. This rounded tip is the area farthest from the two endpoints.
  • The area adjacent to this rounded peak on the convex side of the dividing line 36 forms a surface section 37 , For this area section 37 then becomes the handle 35 as will be discussed further.
  • The area below this area section 37 the layers 30 is above the film 20 with a covering varnish 31 provided, as will be better understood in the following.
  • The user, who now only through the sealing washer 10 from the substance of interest to him inside the container 5 is disconnected, recognizes the dividing line 36 and the adjacent area section 37 , possibly supported by pictograms or imprints or a colored design, and engages the surface portion 37 at.
  • This situation is now in the 3 clearly visible. In the 3 is to see that the user at the dividing line 36 at the surface portion 37 attacked. The cover varnish 31 below the layers 30 and above the film 20 (or in other alternative embodiments also between two layers of the layer package 30 ) covers namely in the area section 37 the adhesive layer 32 from. This leads to the fact that the surface section 37 with the foil 20 is not connected and due to the perforation or dividing line 36 also from the surrounding area of the layers 30 can be easily separated. This allows the user now this area section 37 lift up, resulting in a tab-like handle 35 results, which can now be deducted more and more.
  • In the figures, two different embodiments are indicated.
  • For a first embodiment, it is assumed that only the dividing line 36 is provided, which the surface section 37 largely surrounds. If you pull now on the handle 35 , this is due to the tab-like handle 35 well possible, and it can force considerable force on the entire gasket 10 be exercised. Then the handle could 35 with the surface section 37 now for tearing up all the rest of the gasket 10 be used.
  • In a second embodiment, additional lines of weakness are now 38 intended. The lines of weakness 38 connect the two endpoints of the dividing line 36 with the edge 11 the sealing disc 10 , In the illustrated embodiment, this is the dividing line 36 up to two connection points 12 on the edge 11 the sealing disc 10 extended.
  • In this embodiment, the Abdecklack now takes 31 the entire area on the convex side of the dividing line 36 one. So he covers the adhesive layer 32 in this entire area in addition to the area section 37 from. Then the handle 35 be completely peeled off and between the user and the contents of the container 5 there is only the film left 20 and the sealing layer 25 , This area can then be opened separately, as it is very thin. Then you would have a defined pouring hole within the mouth of the container 5 ,
  • In other, not shown embodiments is no Abdecklack 31 provided, but instead is the adhesive layer 32 so applied that they are just in the area section 37 is absent or has a lower bond strength. This can be achieved by using this adhesive layer 32 previously applied with a suitably prepared roller on the later laminated together layers.
  • In any case, due to the sectional shape of the weakening line 36 a kind of tab or handle 35 , the previously integrated surface component of the reinforcing layer 30 has been.
  • It is therefore unlike conventional protruding folds or outwardly projecting tabs not an additional surface component or an additional attached element of the gasket 10 but a non-projecting, protruding or otherwise conspicuous integrated surface component of one of the layers of the sealing disc 10 ,
  • The user then tears this handle 35 completely off, he has automatically in the various embodiments, an opening in the gasket 10 created or completely withdrawn. In both cases, he can now introduce a teaspoon or he can about a liquid by tilting the container 5 pour out.
  • The shape of the created opening is either the entire mouth of the container 5 or it is predetermined by the perforation and exactly defined and predictable for the user, so that it can not come to surprising and unpredictable reactions of the contents by spilling or the like. Moreover, it is neither necessary nor can it happen in the case of a careless user that this gets into the container interior with his finger or several fingers. The entire opening movement takes place above the mouth level of the container 5 from.
  • Even in the embodiment in which only the thin metal foil 20 and the sealing layer 25 standing still in a small area and must be pierced, offers for the teaspoon or any other measure available anyway.
  • In other embodiments, by grasping the handle 35 and correspondingly angled pulling the entire sealing disc 10 or their still on the opening edge of the mouth of the container 5 located layers are deducted.
  • You can in the 4 the embodiment of the sealing disc 10 recognize in plan view. This sight is given to the user after having the screw cap 6 from the container 5 unscrewed and directly from the top of the gasket 10 looks. He sees the top layer, that is the reinforcement layer 30 , On this reinforcement layer 30 the dividing line stands out 36 starting from the area section 37 largely surrounds. To the endpoints of the dividing line 36 closes the line of weakness 38 from the first connection point 12 on the edge 11 the sealing disc 10 to the dividing line 36 and then on to the second connection point 12 runs. Here you can see especially well the isosceles triangle with the rounded tip in the dividing line 36 to which the surface section 37 connects, the handle 35 here forms.
  • Raise the user in the area of the dividing line 36 the surface section 37 to what, due to the Abdecklacks 31 (please refer 3 ) is easily possible, then becomes along the line of weakness 36 this handle 35 completely out of the remaining surface of the gasket 10 torn out.
  • Looking back at the 1 you can still see that on top of the reinforcing layer 30 above the dividing line 36 may still be a release varnish, which is a simplified separation of the reinforcing layer 30 and the underlying layers from the other layers above 40 which form the so-called reseal part for reclosability.
  • Furthermore, even between the reinforcing layer 30 and the induction foil 20 a foam sheet, in particular a foam sheet of polyethylene or polypropylene.
  • In the 5 is a plan view of a sealing washer 10 to recognize. You can see on the reinforcement layer 30 , which occupies the entire surface of the top of the circular sealing disc here.
  • In this reinforced layer 30 you can see the dividing line 36 , which is drawn eccentrically in a symmetrical arc, which is to the edge 11 the sealing disc 10 opens. Between the two endpoints of the curved dividing line 36 you can think of a baseline pulled.
  • Between this baseline and the arc is the area section 37 intended. He is clearly highlighted here. On the side of the reinforcement layer facing away from the user 30 can be found in the area of the surface section 37 an adhesion-reduced application or Abdecklack or no adhesive layer, while throughout the remaining area of the sealing disc 10 an adhesive layer 32 and no such adhesion-reduced application or resist is provided.
  • Now takes a user in the area of the dividing line 36 this area section 37 , so he can easily lift it from the lying in the sheet plane of the drawing surface and fold around the base line up to this area section 37 in the form of a tab-like handle protrudes perpendicularly from the leaf level. Then the user can attack on this tab-like handle and pull and leave his pulling force acting on the tab-like handle. It becomes clear that this tensile force then passes over the baseline, which is not weakened or separated, into the surface area of the sealing disc 10 is transferred here immediately adjacent and relatively close to the edge in this embodiment 11 the sealing disc 10 lies. This has the consequence that the tensile force directly against the adhesion of the sealing layer 25 (see 1 or 3 ) and makes it possible to break this adhesive force. Once this is done, the entire sealing disc can be left 10 Pull cleanly from the edge of the mouth of the container by applying further tensile force.
  • In the 6 another embodiment is shown. Again you look at the reinforcing layer from above 30 the sealing disc 10 and sees another shape of the surface section here 37 , which after lifting it's tab-like handle 35 forms. This area section 37 here is trapezoidal, with the base line is on the wider side of the trapezoid.
  • In addition to the dividing line 36 here is a line of weakness 38 entered, which are the endpoints of the baseline of the dividing line 36 with the edge 11 the sealing disc 10 combines. This line of weakness 38 moreover, it goes symmetrically in an arc beyond the baseline on the surface section 37 opposite side.
  • Again, the user can on the side facing away from the baseline side of the dividing line 36 of the area section 37 Lift the latter and pivot it around the base line and thus perpendicular to the page plane and thus perpendicular to the surface of the sealing disk 10 put up. The user then pulls this tab-like handle 35 , which has formed so on, and exerts additional traction, so in this case along the line of weakness 38 tear the sealing washer altogether and the entire area between the weakening lines 38 Cut out.
  • In this embodiment, an approximately triangular cutout is formed in the sealing disc 10 , which forms a 60 ° angle and can be used, for example, as a drinking opening. The area of the sealing disc 10 outside the lines of weakness 38 remains on the mouth of the container.
  • In the 7 is a third embodiment in a similar form as in FIGS 5 and 6 shown. Again, one looks from above at the reinforcing layer 30 and sees a dividing line 36 , which is a surface section 37 largely surrounds. Between the two endpoints of the dividing line 36 you can think of a baseline again. A user at the dividing line 36 attacks, there again the area not connected to the underlying layers 37 Swivel around the base line and perpendicular to the sheet plane and to the surface of the gasket 10 put up. The resulting in this way in this embodiment tab-like handle 35 is asymmetrical and allows a particularly interesting opening behavior when pulling force on the tab-like handle 35 is exercised. It is in addition an attenuation line 38 provided, the circular symmetrical around the center of the sealing disc 10 is drawn. If you pull now on the tab-like handle 35 Thus, the tensile force on the side of the inner circle adjacent to the baseline becomes within the line of weakness 38 transferred and with further application of the tensile force then spirally an opening within the sealing washer 10 reached.
  • In the 8th is a fourth example of an embodiment of a sealing washer according to the invention 10 specified. Again, one looks from above at the reinforcing layer 30 a sealing washer 10 , Here again is an approximately quadrilateral shape of a surface section 37 indicated on three sides by the dividing line 36 is surrounded. Attenuation lines start from the two endpoints of the baseline and connect them to the adjacent edge 11 the sealing disc 10 while to the other circular as in the example of 7 run, but not completely close.
  • In this embodiment, the surface portion 37 pivoted about the baseline and perpendicular to the sheet plane or to the surface of the sealing disc 10 and then applied by a user a tensile force, so tears here the short section of the line of weakness 38 to the edge 11 the sealing disc 10 on and the entire outer edge of the gasket 10 can then the line of weakness 38 in turn spirally withdrawn, so that the sealing disc 10 directly and directly at the edge in the sealed area of the sealing layer 25 is applied to the upper edge of the mouth of the container with force and dissolves successively.
  • The still standing inside area within the circular weakening line 38 can then be separated separately.
  • Further embodiments of the shape of the surface portion 37 and the relative arrangement of the baseline between the two extremities of the dividing line 36 relative to the edge 11 the sealing disc 10 are conceivable.
  • LIST OF REFERENCE NUMBERS
  • 5
    container
    6
    screw cap
    10
    sealing washer
    11
    Edge of the sealing disc
    12
    Starting points on the edge of the sealing disc
    20
    Foil for inductive coupling (metal foil)
    25
    sealing layer
    30
    reinforcing layer
    31
    adhesion-reduced application or covering varnish
    32
    adhesive layer
    35
    handle
    36
    parting line
    37
    surface section
    38
    weakening line
    40
    Layer on underside of screw cap (Reseal part)

Claims (11)

  1. Sealing disc ( 10 ) for the closure of mouths of containers ( 5 ), wherein the mouth has an edge and the sealing disc ( 10 ) a matching border ( 11 ), with a film ( 20 ) for the inductive coupling of heat into the sealing disc ( 10 ), with a sealing layer ( 25 ) on the inside of the container ( 5 ) facing side of the film ( 20 ) for sealing sealing the sealing disc ( 10 ) on the edge of the mouth of the container ( 5 ), with several layers ( 30 ) on that of the sealing layer ( 25 ) facing away from the film ( 20 ), with an adhesive layer ( 32 ) between two of the layers ( 30 ), with one as part of the sealing disc ( 10 ) trained handle ( 35 ) for opening the mouth of the with the sealing disc ( 10 ) sealed container ( 5 ), wherein at least one of the layers ( 30 ) on that of the sealing layer ( 25 ) facing away from the film ( 20 ) with a dividing line ( 36 ) for forming an outline of the handle ( 35 ), characterized in that a surface section ( 37 ) adjacent to the dividing line ( 36 ) is constructed so that the adhesive layer ( 32 ) in this area section ( 37 ) has a reduced bond strength or is omitted or with a layer having an adhesion-reduced coating ( 31 ) and that the dividing line ( 36 ) the area section ( 37 ) partially to form a tab-shaped handle ( 35 ) surrounds.
  2. Sealing disc ( 10 ) according to claim 1, characterized in that the adhesion-reduced order ( 31 ) is a non-stick coating, in particular a polyamide varnish or a polyester varnish.
  3. Sealing disc ( 10 ) according to one of the preceding claims, characterized in that the adhesion-reduced order ( 31 ) is applied with an application rate of more than 1.0 g / m 2 and less than 2 g / m 2 , in particular more than 1.3 g / m 2 and less than 1.5 g / m 2 .
  4. Sealing disc ( 10 ) according to one of the preceding claims, characterized in that subsequent to one or both ends of the dividing line ( 36 ) one or more weakening lines ( 38 ) are provided.
  5. Sealing disc ( 10 ) according to one of the preceding claims, characterized in that the weakening lines ( 38 ) a connection between two starting points ( 12 ) on the edge ( 11 ) of the sealing disc ( 10 ) on the surface of the sealing disc ( 10 ) and the endpoints of the dividing line ( 36 ) and that the surface section ( 37 ) on the starting points ( 12 ) facing convex side of the dividing line ( 36 ) lies.
  6. Sealing disc ( 10 ) according to claim 5, characterized in that the sealing disc ( 10 ) is circular, that the dividing line ( 36 ) forms a surface whose shape is similar to an isosceles triangle with an imaginary straight line between the two end points as a base, but is formed with a rounded tip, and that the surface portion ( 37 ) the rounded tip on the convex side of the dividing line ( 36 ) fills symmetrically to the bisector of the isosceles triangle.
  7. Sealing disc ( 10 ) according to one of the preceding claims, characterized in that the dividing line ( 36 ) is formed by a perforation, in particular by a lasered perforation, and that this perforation extends through all layers ( 30 ) on that of the sealing layer ( 25 ) facing away from the film ( 20 ), but not through the film ( 20 ) even.
  8. Sealing disc ( 10 ) according to one of the preceding claims, characterized in that further layers ( 40 ) are provided and adapted to the mouth of the container ( 5 ) after removal of the film ( 20 ) and reassembly of the layers ( 40 ) close tightly.
  9. Sealing disc ( 10 ) according to claim 8, characterized in that the further layers ( 40 ) comprise a carrier layer of a foamed polymer or of cardboard.
  10. Sealing disc ( 10 ) according to claim 8 or 9, characterized in that the layers ( 40 ) on that of the sealing layer ( 25 ) facing away from the film ( 20 ) above the layer ( 30 ) with the dividing line ( 36 ) already after the filling and closing process of the manufacturer Container ( 5 ) by thermal action of the layer ( 30 ) or that the layers ( 40 ) on the of the sail layer ( 25 ) facing away from the film ( 20 ) above the layer ( 30 ) with the dividing line ( 36 ) by the manufacturer after the filling and closing process of the container ( 5 ) still with the layer ( 30 ) are connected and only loosen when first screwing a screw cap.
  11. Container ( 5 ) with an orifice through a sealing disc ( 10 ) is closed according to one of the preceding claims.
DE201310015581 2013-09-20 2013-09-20 Sealing disk for induction sealing of a container Active DE102013015581B3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE201310015581 DE102013015581B3 (en) 2013-09-20 2013-09-20 Sealing disk for induction sealing of a container

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE201310015581 DE102013015581B3 (en) 2013-09-20 2013-09-20 Sealing disk for induction sealing of a container
PCT/EP2014/069200 WO2015039927A1 (en) 2013-09-20 2014-09-09 Sealing disk for the induction sealing of a container
EP14766430.4A EP3046849A1 (en) 2013-09-20 2014-09-09 Sealing disk for the induction sealing of a container

Publications (1)

Publication Number Publication Date
DE102013015581B3 true DE102013015581B3 (en) 2014-10-02

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DE (1) DE102013015581B3 (en)
WO (1) WO2015039927A1 (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9108868U1 (en) * 1991-07-18 1991-09-12 Alcan Deutschland Gmbh, 3400 Goettingen, De
DE19920572A1 (en) * 1999-05-04 2000-11-23 Alfelder Kunststoffw Meyer H Screw cap with sealing washer
DE60104058T2 (en) * 2000-04-07 2005-06-30 Société Alsacienne d'Aluminium Cover element for container to open by peeling
EP1842792A1 (en) * 2006-04-07 2007-10-10 Sonoco Development, Inc. Membrane closure for container
EP1472153B1 (en) * 2002-02-07 2008-06-18 Illinois Tool Works, Inc. Container closure
DE102007014084B3 (en) * 2007-03-21 2008-07-03 Alfelder Kunststoffwerke Herm. Meyer Gmbh Method for manufacturing seal disk, involves piercing continuous holes in sheeting, where holes are perforated at distance that corresponds to distance of seal disk
EP2045194B1 (en) * 2007-09-25 2009-08-19 Manufacture Generale de Joints Tab seal for sealing a vessel to be closed by plug or cap and related manufacturing method
DE102012006934B3 (en) * 2012-04-05 2013-07-18 Alfelder Kunststoffwerke Herm. Meyer Gmbh Sealing disc for induction sealing of a container

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1829642A (en) * 2003-07-25 2006-09-06 加川敦子 Cover body for sealing container with excellent unsealing retainability

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9108868U1 (en) * 1991-07-18 1991-09-12 Alcan Deutschland Gmbh, 3400 Goettingen, De
DE19920572A1 (en) * 1999-05-04 2000-11-23 Alfelder Kunststoffw Meyer H Screw cap with sealing washer
DE60104058T2 (en) * 2000-04-07 2005-06-30 Société Alsacienne d'Aluminium Cover element for container to open by peeling
EP1472153B1 (en) * 2002-02-07 2008-06-18 Illinois Tool Works, Inc. Container closure
EP1842792A1 (en) * 2006-04-07 2007-10-10 Sonoco Development, Inc. Membrane closure for container
DE102007014084B3 (en) * 2007-03-21 2008-07-03 Alfelder Kunststoffwerke Herm. Meyer Gmbh Method for manufacturing seal disk, involves piercing continuous holes in sheeting, where holes are perforated at distance that corresponds to distance of seal disk
EP2045194B1 (en) * 2007-09-25 2009-08-19 Manufacture Generale de Joints Tab seal for sealing a vessel to be closed by plug or cap and related manufacturing method
DE102012006934B3 (en) * 2012-04-05 2013-07-18 Alfelder Kunststoffwerke Herm. Meyer Gmbh Sealing disc for induction sealing of a container

Also Published As

Publication number Publication date
WO2015039927A1 (en) 2015-03-26
EP3046849A1 (en) 2016-07-27

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