DE2256498C3 - Fully tear-open lids for cans and similar containers - Google Patents

Description

25th

The invention relates to a full tear-off lid for cans and similar containers, which one tearable area delimited by a score line, one by means of a rivet on a rivet platform on the tearable area attached rigid tab, one on a small section of the kerbünie has acting break-up edge on its side facing the cover core wall, and one directly arranged next to the rivet and delimiting the rivet platform in the direction of the ceiling mirror, banana-shaped Bead.

Such a fully tear-open cover is known from DT-OS 21 00 580. In the case of the known lid there is the problem that tearing open only with greater effort and insufficient unrolling of the lid can be done. This leads to the fact that when the can is opened, one easily slips off the grip tab and / or a kinking of the lid takes place and thus the contents of the can away from the lid or out of the can spurts out. In the known cover there is a banana-shaped bead directly next to the rivet provided, from which material can be released when the grip tab is lifted, so during, but also only while lifting the grip tab a reduction in the effort required to Breaking up the kerbünäe is achieved.

In contrast, the object of the invention is to create a tear-open lid of the type mentioned at the beginning Type in which the entire tearing process with great lateral stability of the lid with little Force can be carried out by rolling the lid evenly.

This object is achieved according to the invention in that in the direction of the lid center directly next to the banana-shaped bead is a traverse-like cross bead, which with their outer ends is brought as close as possible to the score line, and that the transverse bead in their middle part near the banana-shaped bead is drawn deeper and ends at its ends

From DT-OS 20 08 138 it is known per se, a to pull the bead surrounding the rivet deeper towards the end of the handle, so that material on this side when lifting the tab is released without tearing of the lid at this point.

The invention is further developed below with reference to drawings and exemplary embodiments explained.

F i g. 1 shows a top view of the tear-open cover with the grip tab already mounted;

F i g. 2 shows the fully tear-open cover without the mounted tab in a top view;

3 shows a section through a on the Can body, folded open, full tear-open lid with mounted tab;

Fig.4 shows; in enlarged form a longitudinal section the transverse bead by a cover section, which is drawn offset by 90 degrees.

The execution and also its form of the in F i g. 3 drawn container is arbitrary. Im shown here For example, it consists of a round can body (15), which at one end, not shown here, is shown in FIG conventional way is closed, it is the same which profile shape is stamped in the ground is; at the other end, however, it is provided with a fully tear-open cover (19). This full tear-open lid (19) has the training features necessary for easy opening of the tin can or the like Serve container. This tear-open lid (19) has a double flap closure (16), a lid core wall (18), a cover surface (5), at least one ring plait shape (3), a weakening line (score line) (2), a rigid grip tab (8), a transverse bead (6) and a banana-shaped bead (14) as essential features on.

The special feature of this tear-open cover is that it is in the immediate vicinity of the rivet platform (13) attached banana-shaped bead (14), which when lifting the grip tab (8) for the hinge-like Effect releases required material.

In the recorded here embodiment, almost the entire between the chuck wall (18) running surface (3), (4), (5) out of the full aperture (19) along _de: torn score line (2) by means of the gripping tab (8). The score line (2) runs as closely as possible parallel to the cover core wall (18). The shape of the torn-out part can also differ from the above-described design ■■ ·? differ as required by the product that is packed in the containers.

On the ring platform (3) between the traverse-like transverse bead (6) and the banana-shaped hinge-like acting bead (14) is extremely close to the Kerbünie (2) the rivet plate (! 3), from which the full material of the rivet (9) is pulled out in a known manner in several drawing stages.

The banana-shaped bead (14) is brought very close to the rivet (9) in order to achieve the greatest possible slight deformation work when lifting the grip tab (8) zv .

The handle tab (S) consists of a rigid body, at the front end facing the cover core wall (18) there is a narrow break-open edge (11) is located.

At the opposite end of the break-open edge (11) is the grip ring (12), which together with the rivet platform (10) of the grip tab (8) forms a closed, rigid unit.

Regardless of the shape of the handle, the respective requirements can be used at any time

a rigid grip tab other construction be mounted in the same way.

When the can or a similar container with the full tear-off lid (19) is to be opened, the grip tab (8) is grasped with the finger and lifted. In this case, an upward stress on the rivet platform (13) is first generated, which has an effect in the area of the score line (2), but is not large enough to enable immediate breaking. Due to the stiffening of the tear-open lid (i9) transversely to the tear-open direction of the same, due to the transverse bead (6), which is shaped according to the bending moment and whose lower edge runs conically downwards from both sides (towards the inside of the can) so that the deepest point is in the middle part (20 ) the same lies in the area of the lid. Here, the material inevitably yields from ■ -. ■■ .. banana-shaped bead (14), ·> «» ^ u when you lift the grip tab {8} d <- - the effect on the opening edge (11) is so great ^{! It} will be that the score line (2) under the break-up quay: [I i) will tear. If you move further vertically, all and at the same time, pulling up the grip tab (8) you will achieve a perfect by stiffening the cover through the transverse bead (6) Uniform tearing and unrolling of the entire tear-open part (3), (4), (5), without having to use other means to lift the lid from above, to prevent bulging after the same / Avoid what would otherwise inevitably lead to detonation of the can body (! 5) and which would considerably impair the \ ulreilKorgang s

Compilation of the respective positions

(1) Rolled-on edge of the lid

(2) score line

(3) ring platform

ίο (4) slope to the cover surface

(5) Lid mirror

(6) transverse bead

(7ä) \ Nocks for lateral locking (76) / dtr grip tab is (8) grip tab (9) rivet

(10) Rivet platform on the grip tab

(11) Break-open edge on the grip tab

(12) Grip ring of the grip tab (13) Rivet platform of the lid

(14) banana-shaped bead

(15) Container body (can body)

(16) Double seam lock

f 17) Compound injection in the edge of the lid

(18) Lid core wall

(19) Fully tear-open lid

(20) middle part of the transverse bead

For this purpose 2 sheets of drawings

Claims (1)

Claim: Fully tear-open lids for cans and similar containers, which can be identified by a score line limited tearable area, one by means of a rivet on a rivet platform at the tearable area attached rigid tab with a break-open edge acting on a small section of the score line has on its side facing the lid core wall, and one immediately next to the Banana-shaped bead arranged in a rivet delimiting the rivet platform in the direction of the cover surface, characterized in that in the direction of the lid center immediately next to the banana-shaped Bead (14) is a traverse-like transverse bead (6), which with its outer Ends as close as possible to the score line (2), and that the transverse bead (6) in their middle part (20) near the banana-shaped bead (14) is drawn deeper and expires at its ends.