EP3048060A1 - Container with sealing edge and container - Google Patents

Abstract

The invention relates to a container (1), comprising: a circumferential side wall (3) on which in the region of an opening (4) of the container (1) a circumferential, outwardly and / or inwardly beyond the side wall (3) formed as a sealing rim usable container edge (5) having an upper side with a width of at least 2 mm for applying a particular peelable film, and a peripheral skirt (6) having an engagement portion for cooperation with a lid, wherein between the side wall (3), a circumferential outer edge of the skirt (6) and an upper edge of the skirt (6) a plurality of webs (16) is formed. The container rim (5) and the skirt (6) are arranged along the side wall (3) of the container (1) spaced from each other. The invention also relates to a container with such a container (1) and with a cooperating with the circumferential engagement region of the container (1) lid.

Description

The invention relates to a container, in particular a bucket, comprising: a circumferential side wall, in which in the region of an opening of the container, a circumferential, outwardly and / or inwardly over the side wall protruding and usable as a sealing edge edge of the container is formed, having an upper side a width of at least 2 mm for applying a particular peelable film, and a circumferential skirt having an engagement portion for cooperating with a lid to close the container with the lid, wherein between the side wall, a peripheral outer edge of the skirt and a upper edge of the skirt a plurality of webs (or support ribs) is formed. The invention also relates to a container with such a container and with a lid closing the container.

From the DE 20 2011 100 541 U1 a packaging container has become known, which has a lid and a container for storing preferably hot fillable food. The container has an upper, outwardly over the side wall protruding container rim, which is usable as a sealing edge and merges into an apron. The container rim has an upper surface of sufficient width (for example, 3 mm) to weld a film to the top of the container rim, thereby sealing or sealing the opening of the container in an ideal manner. The welded-on foil can be pulled off, for example, by a consumer in order to gain access to the filling material, for example a food stuffed into the container.

In addition to the film is in the in the DE 20 2011 100 541 U1 container described as a clamping or slip lid trained lid on the upper edge of the container can be fixed. In one example, the lid includes an outer area over which the lid is clamped on the upper apron area of the container. The upper part of the side wall of the container and its adjacent apron area in the upper part of the container are stabilized by webs which extend to the upper edge of the container forming the sealing edge.

In the DE 34 47 558 A1 a combi container is described in particular made of clear plastic for food, which consists of a lower part, in particular a cup, and a lid. The lid is sealed by a diffusion film sealable. In the area of the cup opening, the wall of the cup goes over into a stack edge which extends horizontally slightly outwardly from the cup jacket and, at an upper edge, into a horizontal sealing edge receiving the diffusion film of the same thickness. The snap cap may have on its inner side a circumferential groove with which a sealing edge extending from the edge of the seal to the outside and downwardly extending collar can be brought into engagement.

The invention has the object of developing a container and a container of the type mentioned in such a way that the sealing effect of a aufzuschweißenden to the container edge film is increased.

This object is achieved according to a first aspect by a container of the type mentioned, in which used as the sealing edge Container edge and the skirt along the side wall of the container are arranged spaced from each other and the sealing edge does not come with radially extending webs or ribs above or below it.

According to the invention it has been recognized that it in the in the DE 20 2011 100 541 U1 described container in which the container edge forming the sealing edge also forms the top of the apron, which is stiffened for example in packaging buckets usually by radially extending ribs or webs between the side wall and the skirt comes to problems in applying the film: It has that in the production of the container in an injection molding process, the upper edge of the skirt in a respective section in the circumferential direction, where a web is formed, has a Einfalistelle, ie the otherwise substantially flat top of the upper edge of the skirt has in the region of respective ridge on a dent which extends from the circumferential side wall in the direction of the outer edge of the skirt; If a film was applied to the upper edge of the skirt, for example by ultrasonic welding, the connection in the region of the dent may not be complete, so that the film could not completely close the opening and the sealing effect would be impaired.

Such sink marks thus prevent an ideally sealing application of a sealing film on the container edge. According to the invention, therefore, the sealing function and the stiffening apron function is separated by the container rim which can be used as a sealing edge being formed so as to be spaced from the skirt and thus not touched by webs or ribs. In this way, the sink marks or bumps possibly produced in the production of the apron can not on the top of the sealing edge impact container rim used and it formed in the production of the container in an injection molding process in the region of the container edge no sink marks. The manufacture of such a container in which the container rim and skirt are spaced apart in an injection molding process typically requires the use of pusher tools for demoulding. The container edge of such a container has an almost completely smooth surface, so that a preferably peelable film can be welded sealingly. A peelable film is understood to mean a sealing film which can be detached or pulled off from the sealing edge without the film being torn.

The top of the container rim extends from the peripheral side wall substantially horizontally (i.e., parallel to the bottom of the container) to allow application of the particular peelable film. Optionally, the top of the container rim may be tilted to the horizontal direction by a small angle (typically less than about 10 °). The top of the container edge should ideally be flat, but this may possibly have a slight curvature. The container rim may extend outwardly and / or inwardly from the sidewall, i. into the region of the opening. Typically, the container rim is formed with a substantially constant wall thickness, i. this has an underside which is substantially parallel to the top.

Optionally, at the top of the container rim typically a circumferential increase (with a size of one or a few tenths of a millimeter) may be formed, which tapers at its free end in the rule and the one energy directors for the Ultrasonic welding for connecting the film with the container edge forms. The ultrasound energy is coupled into the tip of such an energy directing device, whereby the directional sensor heats up and softens from the tip or liquefies. The applied to the top of the container edge film is glued by the soft or liquefied plastic of the direction sensor with the container edge. When gluing disappears, the circumferential increase, so that the container edge after ultrasonic welding at its top runs flat or possibly has a (desired) slight curvature.

The container edge typically has no portion at its outer and / or inner edge that deviates from the substantially horizontal orientation, ie, extends from the top of the container edge upwards or downwards. Such a section, as for example in the DE 34 47 558 A1 is provided on the outer edge of the container rim is not needed in the present container, since the lid is attached to the container at the engaging portion of the skirt. Such an attachment has been found to be advantageous, since when mounting the lid on the container edge (possibly without underneath apron) may cause the problem that the lid when transporting several stacked containers on a common pallet from the container triggers, if Press other containers from below against the lid. When attaching the lid to the skirt such unintentional release of the lid can be prevented in particular when an outer edge of the skirt, which is located below the engagement area, extends further outwardly than the outer edge of the lid placed on the container.

The skirt formed on the container typically has a top edge, which is connected to the side wall and extends radially outward therefrom, to which a peripheral, downwardly, i.e., outwardly directed, upper edge is provided. in the vertical direction, extending outer edge connects. The apron, more precisely a lower edge on the outer edge of the skirt, can serve to support the container when filling in a filling plant on a corresponding insert. The webs distributed in the circumferential direction along the side wall connect locally the outer edge of the skirt with the circumferential side wall and the upper edge of the skirt, so that the skirt is stabilized as a whole.

For the purposes of this application, the term "circulating" does not necessarily mean complete circulation (by 360 °) in the circumferential direction. However, the container edge typically runs completely around so that the film can completely seal the opening.

The upper side of the container rim has a width of at least 2 mm, preferably of at least 3 mm, in particular of at least 4 mm. In this way it can be ensured that the welding of a particular peelable film on the top of the container edge can be done with sufficient precision.

The container edge or the entire container may have a wall thickness of less than, for example, 1.0 mm. The smallest possible wall thickness of the container or the container edge reduces the material requirement and thus the manufacturing cost of the container. It is understood that the wall thickness of the container rim may not be too low to ensure that the edge of the container has sufficient stability.

In one embodiment, an upper edge of the skirt has a spacing of at least 0.5 mm and not more than 15 mm from the edge of the container. It has proven to be advantageous to arrange the upper edge of the skirt at a sufficient distance from the over the side wall projecting container edge to allow the engagement or the interaction of the lid with the engagement portion of the skirt. On the other hand, the distance between the container rim and the upper edge of the skirt should not be too large to prevent the outer edge of the lid from having to be extended too far down so as to be able to cooperate with the engagement area of the circumferential skirt.

In a further embodiment, a clamping profile for cooperation with a lid for the container is formed on the engagement region of the skirt. The clamping profile can be, for example, a circumferential projection which cooperates with a further projection, which is formed on the inside of the lid edge, for forming a clamping connection on the engagement region. The further projection or the clamping connection of the cover can engage or grip behind the clamping profile of the skirt for producing a clamping or latching connection on the engagement region.

In a further embodiment, the container is made of plastic, in particular of polyolefins, for example of polyethylene or polypropylene. Container made of polyolefins, in particular polyethylene or polypropylene, are typically inexpensive to produce. Furthermore, such containers have advantageous properties, such as a high resistance to high toughness and Elongation at break. In principle, however, the container can also be produced from other plastic materials (in particular from thermoplastics, if appropriate also from thermosetting plastics).

In one embodiment, the container is manufactured by an injection molding process. For the demolding of the container described herein, wherein the container rim and skirt are spaced apart, in an injection molding process, it is typically necessary to use a pusher tool. On the top of the peripheral container edge of the container, a sealing foil can be applied after filling to seal the opening in a sealed manner.

The object is achieved according to a further aspect by a container which comprises a container according to the invention and a cooperating with the circumferential engagement region of the skirt lid. By attaching the lid to the engaging portion of the skirt, a particularly secure attachment of the lid to the container, e.g. via a clamping or a locking connection, done. In particular, the lid may have an encircling edge which is in the form of an N-profile, for example, whose outer limb continues so far downwards that it can cooperate with the skirt at the area of engagement of the skirt.

In one embodiment, the lid has a further clamping profile for cooperation with the clamping profile on the engagement region of the skirt. At the engagement region, the further clamping profile can be brought into engagement with the clamping profile of the skirt in order to lock the lid to the container and to close it. The further clamping profile may be, for example, a particular peripheral projection acting under the clamp on the apron under or behind. It is understood that the interaction between the lid and the engagement region of the container by a snap or latching connection can also be done in other than the manner described here.

Further advantages of the invention will become apparent from the description and the drawings. Likewise, according to the invention, the above-mentioned features and those which are further developed can each be used individually for themselves or for a plurality of combinations of any kind. The embodiments shown and described are not to be understood as exhaustive enumeration, but rather have exemplary character for the description of the invention.

Fign. 1a-1c

Darstellungen eines Ausführungsbeispiels des Behälters in einer Schnittdarstellung (Fig. 1a) sowie eines Details des Behälters (Fig. 1b,c) mit einem Behälterrand und einer von diesem beabstandeten Schürze in einer Schnittdarstellung und in einer perspektivischen Ansicht, sowie

Fign. 2a-2d

mehrere Ansichten eines Gebindes, welches den Behälter gemäß Fig. 1a-c sowie einen Deckel aufweist, der den Behälter im Bereich einer Öffnung verschließt.

The invention is illustrated in the drawings and will be explained in more detail with reference to embodiments. Show it:

FIGS. 1a-1c

Representations of an embodiment of the container in a sectional view ( Fig. 1a ) as well as a detail of the container ( Fig. 1b, c ) with a container edge and a distance from this apron in a sectional view and in a perspective view, and

FIGS. 2a-2d

several views of a container, which the container according to Fig. 1a-c and a lid which closes the container in the region of an opening.

The in the FIGS. 1a c shown container 1 (bucket) comprises a bottom 2 and a circumferential side wall. 3 At the top of the side wall 3 is in the region of a round opening 4 for supplying a filling material, for example in the form of food, into the container 1, a container edge 5 is formed, which projects in the radial direction outwardly beyond the peripheral side wall 3. The protruding container edge 5 has a horizontal direction (ie parallel to the bottom 2) extending upper side 5a with a width b of more than 2 mm, in the example shown by about 3 mm on. Such a width b is sufficient to use the container edge 5 as a sealing edge, ie to apply to the top of the container edge 5 a (not shown) in particular peelable sealing film, which covers the entire opening 4 to the filling material located in the container 5 to seal. The circumferential container edge 5 has in the example shown on a wall thickness d of about 1.0 mm. If necessary, a circumferential elevation (not shown), which forms an energy directing device for the ultrasonic welding, may be formed on the upper side 5a of the circumferential container rim 5.

The in Fig. 1a-c shown container 1 also has a circumferential skirt 6 , which is spaced from the container edge 5 formed on the peripheral side wall 3. The circumferential skirt 6 has an upper edge 7 , which extends from the side wall 3 in the radial direction to the outside. At the upper edge 7 of the skirt 6, an engagement portion 7a for cooperation with a lid is formed.

The upper edge 7 of the skirt 6 is on its side facing away from the side wall 3 in a circumferential, downwardly extending outer edge 8 of the skirt 6 via. The outer edge 8 of the skirt 6 extends substantially parallel to the longitudinal axis of the container 1 extending in the vertical direction and, with a portion of the side wall 3 adjacent to the outer edge 8, forms a double edge of the container 1. In the area where the upper edge 7 of the skirt 6 is connected to the side wall 3 of the container 1, the skirt 6 has a distance A of approximately 5 mm from the underside of the container edge 5. Typically, the distance A between the upper edge 7 of the skirt 6 and the underside of the container rim 5 is between about 0.5 mm and about 15 mm.

At the in Fig. 1a-c As shown, the engaging portion 7a having upper edge 7 of the skirt 6 has a circumferential projection which forms a clamping profile 9 . The clamping profile 9 limits the engagement region 7 a, which cooperates with a cover 10 of a container 11 , which in Fig. 2a -d is shown and which will be described in more detail below.

Fig. 2a shows the container 11 in a side view, Fig. 2b in a sectional view along the section line AA of Fig. 2a. Fig. 2c shows a detail of the sectional view of Fig. 2b and Fig. 2d shows a perspective view of the container 11. As in Fig. 2c can be seen, the cover 10 has a profile along the section line AA substantially N-shaped peripheral edge 12 , the outer leg 13 continues so far down that this in the region of the upper edge 7 of the skirt 6 into it protrudes.

The outer leg 13 of the peripheral edge 12 of the lid 10 has, on its inner side facing the container 2, a further clamping profile 14 which engages behind or under the clamping profile 9 formed on the upper edge 7 of the skirt 6 in the engagement region 7a. The engagement portion 7a at the upper edge 7 of the skirt 6 forms a circumferential, in radial Direction inwardly extending groove, in which the further clamping profile 14 of the lid 10 engages.

As in Fig. 2d can be seen, the cover 10 has a flat inner region 15 (cover mirror), which is surrounded by the peripheral edge 12. As in Fig. 2c can be seen, the inner region 15 of the lid 10 extends slightly above the container edge 5, to prevent the lid 10 presses in the region of the opening 4 from above against the sealing film.

Like both in Fig. 1c and in Fig. 2c can be seen, a plurality of webs 16 are formed between the upper edge 7 of the skirt 6, the peripheral outer edge 8 of the skirt 6 and an adjacent to the peripheral outer edge 8 of the skirt 6 portion of the circumferential side wall 3 of the container, in the circumferential direction are typically arranged at substantially regular intervals and which serve to stabilize the skirt 6. The lower edges of the webs 16 may be used when stacking a plurality of containers 1 one above the other for conditioning a further container edge of a further lower arranged further container.

As in Fig. 2d can be seen, the container 1 in the region of the skirt 6 an opening tab 17 . The illustration of connections for a handle of the container 1, which are typically attached to the outer edge 8 of the skirt, has been omitted for reasons of clarity.

The container 1 consists in the example shown of plastic, in particular of polyolefins, for example of polyethylene or polypropylene. Of the Container 1 is made in one piece by injection molding in the example shown. It is understood that the container 1 or the container 11 also on other than in Fig. 1a-c or in Fig. 2a-d shown manner may be formed. For example, the container 1 may have an eg oval or rectangular basic shape. Also, the lid 10 may have a correspondingly adapted basic shape.

In the example shown, the outer edge 8 of the skirt 6 extends in the radial direction further outward than the outer edge of the lid 10 to prevent unintentional lifting of the lid 10 from the underside thereof. Optionally, the height of the skirt 6, more specifically the circumferential outer edge 8, may vary in the circumferential direction of the container 1, i. the outer edge 8 may have longer and shorter sections in the circumferential direction. It is understood that the manner of attachment of the lid 10 to the skirt 6 by means of the clamping profiles 9, 14 in the engaging portion 7a is to be understood merely as an example and a snap or latching connection between the lid 10 and the skirt 6 to other than the manner described here can be realized.

Claims (7)

Container (1), comprising: a circumferential side wall (3) on which in the region of an opening (4) of the container (1) is formed a circumferential, outwardly and / or inwardly over the side wall (3) projecting and usable as a sealing edge container rim (5), the a top (5a) having a width (b) of at least 2 mm for applying a particular peelable film, as well as a circumferential skirt (6) having an engagement portion (7a) for cooperation with a lid (10), wherein between the side wall (3), a peripheral outer edge (8) of the skirt (6) and an upper edge (7) Apron (6) a plurality of webs (16) is formed, characterized, in that the container rim (5) and the skirt (6) are arranged spaced apart along the side wall (3) of the container (1). A container according to claim 1, wherein an upper edge (7) of the skirt (6) is spaced at least 0.5 mm and not more than 15 mm from the container edge (5). Container according to Claim 1 or 2, in which a clamping profile (9) for cooperation with a lid (10) for the container (1) is formed on the engagement region (7a) of the skirt (6). Container according to one of the preceding claims, which is made of plastic, in particular of polyolefins. Container according to one of the preceding claims, which is produced in an injection molding process. A container (11) comprising: a container (1) according to any one of the preceding claims and a lid (10) cooperating with the circumferential engagement portion (7a) of the skirt (6). Container according to Claim 6, in which the cover (10) has a further clamping profile (14) for cooperation with the clamping profile (9) on the engagement region (7a) of the skirt (6).

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