DE8901244U1 - container - Google Patents

Description

container

The invention relates to a container, in particular for food, with a base, with a container wall and with a screw cap closure with a lid seal, wherein the container wall has a recessed area at the upper end to accommodate the screw cap.

( Such containers made of glass with a metal twist-off lid closure are known for canning all kinds of goods, e.g. for jams, but also for drinks.

The contents of such containers can be sterilized, whereby when the contents cool down in the container a vacuum is created so that the lid with the lid seal is pressed firmly against the glass body, making the container absolutely tight. A disadvantage of such glass containers is that they are fragile, cannot be stacked, are heavy and are translucent. In addition, the external packaging is limited to the use of adhesive labels due to the glass material.

Tin cans are usually either in awkward

rather opened with a can opener or provided with a technically complex tear-off closure. When opened with a can opener or with a tear-off closure, the container cannot be resealed, so that an additional plastic lid, for example, must be added to the container in order to be able to close the container again after it has been opened for the first time. Such plastic lids are

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However, they are not completely leak-proof and allow, for example in the case of food, contamination of the contents from the outside.

The invention is based on the object of creating a resealable container of the type mentioned at the beginning, which can be stacked, which is shock-resistant, light and unbreakable and in which the contents can nevertheless be sterilized.
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To solve this problem, the invention provides
- that the bottom and the container wall are made of can sheet,

- that the container wall is rolled inwards at the end facing the lid and has a flat support surface for the lid seal and that the drawn-in area has diagonally running thread beads formed by forming, evenly distributed around the circumference, which form a resealable thread-like lid closure with the screw lid.

The invention combines the advantages of a conventional glass container, namely its ability to be resealed, its opening behaviour and the possibility of sterilizing the contents, with the advantages of a tin can, namely its stackability, its impact resistance, its low weight and the wide range of design options for the tin surface, including offset printing. The upper edge of the container wall made of tin can is rolled inwards and forms a flat support surface against which the lid seal rests.

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The lid is pressed against the base by a rotary movement, whereby in the upper area of the container wall there are evenly distributed, circular grooves which, together with the cam lid, form a resealable lid closure. The contents can be sterilized as with glass containers. It is important that the container is lighter and can be stacked. This results in considerable savings when transporting and storing the containers. In contrast to glass containers, there is no loss of volume during packaging, as the metal containers can be pushed against one another and no gaps need to be maintained. A further reduction in volume is achieved by not having to use thick-walled glass. Further advantages are that the filling speed can be higher with a Bluch can container and the containers cannot break during filling or transport, so that follow-up costs due to damage to the containers are negligible or minimal. Furthermore, it is an advantage for certain filling materials that the metal container is opaque.

In one embodiment, the can body, consisting of the base and the container wall, is deep-drawn in one piece. A can body of this type has no seams and thus enables the container to be particularly reliably sealed.

In another embodiment, the can body is made in two parts, with the bottom being connected to the container wall via a folded edge. The bottom is connected to a can

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The well-known folded edge is connected to the container wall, which means that the doe run can be manufactured particularly cost-effectively.

Preferably, the can body is drawn in at the end facing away from the lid closure and the base and the lid surface contour are adapted to each other. The mutual adaptation of the base and the lid surface contour not only enables stackability, but also enables the containers to be stacked on top of each other to remain stable, so that, for example, they can be transported on pallets.

The base and/or the lid surface of the lid closure can be provided with beads that absorb part of the increase in pressure during sterilization due to the increase in volume of the container. When cooling, the beads allow the volume of the container to decrease, so that the vacuum in the container cannot reach too high a level.

Furthermore, it can be provided that the largest lid diameter is smaller than the largest can body diameter. In this way, the containers can touch each other without the lids touching each other, which prevents accidental opening of the containers due to mutual friction of the lids during transport.

The curl at the lid-side end of the container wall can extend to the container wall itself and thus contributes to the dimensional stability of the can body at the upper end.

In the following, embodiments of the invention are explained in more detail with reference to the drawings.

Show it:
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Fig.l a perspective view of a container
made of tin with nook end cap

Fig.2 a section through the container according to Fig.l

Fig.3 a second embodiment of a container with a one-piece can body.

The container shown in Fig.l has a bottom 1

and container wall 2, whereby the container can be closed or opened at its upper end by a cam lid 4 with a short turn. For this purpose, several protruding, thread-like, diagonal beads 5 are provided on the upper edge of the container wall, which are evenly distributed around the circumference of the container wall. These protruding beads interact with an equal number of projections 6 on the inner vertical edge of the lid 4 in such a way that the cam lid 4 can be screwed on or off like a screw cap by turning it by approx. 20* to 30*. The upper area, in which the thread beads 5 are arranged, can be drawn inwards, e.g. over a conical surface 13, in order to reduce or completely prevent the lid 4 from protruding beyond the surface of the container wall 2.

The screw cap has a sealing seal 7 on its inside in a known manner, which is sprayed on, for example, in the form of an aluminum seal. This lid seal 7 interacts with a flat sealing surface 9 on the upper end edge 9 of the can body 3 to enable the container to be securely sealed, particularly in conjunction with a negative pressure in the container. The flat sealing surface 9 at the upper end of the can body 3 is formed by rolling the container wall 2 inwards, creating a flat support surface for the seal 7 of the lid 4. In this way, it is possible to sterilize the contents as with a glass container, with an extremely secure seal being created when cooling due to the negative pressure that is created.

The base 1 of the can body 3 is connected to the container wall 2 by means of a folded edge 8 known, for example, from condensed milk cans, whereby such a can body can be produced cost-effectively using known technology and existing equipment.

Depending on the manufacturing quality of the folded edge, a sealant in the folded edge may not be necessary.

In the embodiment according to Fig.3, the can body 3 is deep-drawn in one piece. The can body can have a stepped or conical reduced diameter at the end opposite the lid end, so that the base 1 fits positively into a corresponding recess 10 in the lid 4. This improves stackability and increases the possible compression load. The in-

The engagement of the base 1 in the recess 10 of the lid enables stable stacking of several layers of containers on top of each other, whereby the containers cannot slip.

Deviating from Fig.3, the base 1 can also have an inward curvature, whereby only the peripheral area of the base 1 interacts with the peripheral area of the recess 10.

The base 1 and the lid 4 can be provided with several concentric beads 11,15 in order to enable a certain pressure _equalization during sterilization or cooling by increasing or decreasing the volume.

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Claims (7)

- 9 Protection claims 1. Container, in particular for foodstuffs, with a base, with a container wall and with a screw cap closure with a lid seal, the container wall having a recessed area at the upper end to accommodate the screw cap, characterized in that the bottom (1) and the container wall (2) consist of can sheet, that the container wall (2) is rolled inwards at the lid end and has a flat support surface (9) for the lid seal and that the recessed area has obliquely running thread beads (5) formed by forming and evenly distributed around the circumference, which form a resealable thread-like lid closure on the screw cap (4). 2. Container according to claim 1, characterized in that the can body (3) consisting of the base (1) and the container wall (2) is deep-drawn in one piece. 3. Container according to claim 1, characterized in that the container body (3) consisting of the base (1) and the container wall (2) is in two parts, the base (1) being connected to the container wall (2) via a folded edge (8). ·· fm - 10 - 4. Container according to one of claims 1 to 3, characterized in that the can body (3) is drawn in at the end facing away from the lid closure and that the base (1) and the lid surface contour are adapted to one another. 5. Container according to one of claims 1 to 4, characterized in that the bottom and/or the lid / . surface of the lid closure is provided with several concentric beads (11). 6. Container according to one of claims 1 to 5, characterized in that the largest lid diameter is smaller than the largest can body diameter. 7. Container according to one of claims 1 to 6, characterized in that the curl at the lid-side end of the container wall (2) extends to the container wall.