CN101479163A - Can product - Google Patents

Abstract

The present invention relates to a container or can, in particular for beverages, having: -a substantially cylindrical wall (1) closed at the top and bottom by sheet metal covers (2) each associated to the wall (1); a sealing element (3) inserted into the opening of the sheet metal cover (2) and allowing resealable opening of the can, wherein the opening in the sheet metal cover (2) is surrounded by a first tapered portion (13) tapering towards the interior of the can by the sheet metal cover (2) and extending between a circular flange (17) and a circular rim (20) of the opening, and the sealing element (3) is provided with a substantially cylindrical retaining portion (7), the retaining portion (7) being inserted into the opening of the sheet metal cover (2) and having an outer peripheral groove (21), the outer peripheral groove (21) receiving the first tapered portion (13) of the sheet metal cover (2) and being constrained in a direction away from the can by a second protrusion (8) against which the flange (17) abuts. A simple design and cost-effective manufacture can be achieved by providing a screw top (5) of the sealing element (3) which in the sealing state abuts against the second projection (8).

Description

can

technical field

The present invention relates to a container or can, in particular for beverages, having a substantially cylindrical wall closed at its top and bottom by a foil and a sealing element which is inserted into the opening of the foil lid and provides the can with a resealable opening, Wherein the opening in the sheet metal lid is surrounded by a first tapered portion of the sheet metal lid that tapers toward the inside of the can and extends between the circular flange and the circular edge of the opening, and the sealing element is provided with a substantially cylindrical retaining The retaining portion is inserted into the opening of the foil lid and has a peripheral groove that receives the first tapered portion of the foil lid and is constrained in a direction away from the can by a second protrusion against which the flange abuts.

Background technique

State-of-the-art beverage cans have sealing elements in the form of tear openings made by the user in the can. Usually such openings are not resealable. Various other sealing elements are known which allow cans to be opened and resealed. However, these components are difficult to manufacture and are prone to defective products if mass-produced and thus become a source of problems.

US Patent No. 2,687,831A shows a sealing element that snaps into a corresponding retaining element. These sealing elements are suitable for fastening spouts but cannot withstand the forces and torques caused by screw-on type seals. Other seals having insufficient strength are described in US Patent Nos. 3,998,354A and 4,327,842A.

Contents of the invention

It is an object of the present invention to provide a can with a resealable sealing element which is structurally simple, inexpensive to manufacture and easy to handle. The sealing element is particularly strong and does not interfere with the storage and disposal of the can. In particular, the forces and torques induced at the opening of the can are reliably supported.

According to the invention, there is provided a screw top which abuts against the sealing element of the second protrusion in the closed state. An essential aspect of the invention is the simple and reliable insertion of the sealing element into the opening of the foil cover. The result is a snap-in connection that, if dimensioned correctly, makes insertion of the sealing element into the opening relatively easy, but also guarantees a secure fit of the element. At the same time a liquid-tight seal can be provided which prevents unwanted spillage of the can's contents.

A remarkably reliable functional and structural soundness of the sealing element is obtained if the screw top of the sealing element is pressed against the second projection in the closed state. This will provide secure end positioning when screwing into screw top caps.

Mounting of the can becomes particularly easy if the peripheral groove of the retaining part is constrained axially by the first protrusion, the retaining part having a bearing shoulder on one side of the groove and tapering on the other. In this way, the sealing element, once inserted into the opening, slides easily over the edge of the opening without causing permanent deformation.

A particularly secure mounting of the sealing element is achieved by giving the peripheral groove of the retaining portion an axial width corresponding to the axial width of the first tapered portion of the sheet metal cover. This will eliminate axial play of the sealing element. It is especially advantageous in this case if the peripheral groove of the retaining part is constrained in a direction away from the can by the second projection against which the flange abuts.

It has been found to be particularly advantageous if, on the outside of the first conical part, there is provided a second conical part radially adjacent to the first conical part and in a direction away from the can. This will increase the spring effect, providing enough elasticity to avoid damage when inserting the sealing element, even when using hard plastics.

It is particularly advantageous from a material strength point of view to have the opening eccentrically located in the sheet metal shell, ie next to the edge of the cover. This also allows the user to completely use up the contents of the can.

A particularly simple design is obtained if the sealing element consists of a one-piece bottom part and screw top cover.

In the case of beverage cans, security seals are often required to provide the possibility of identifying whether the can still retains its original seal or has been opened before. Tear off the safety cover to achieve this function. Preferably, the safety seal is the second raised panel portion against which the edge forms the hem. As an alternative, when using beverage bottles, a screw top cap with a pilfer ring can also be provided.

A sound design and reliable function are obtained if the screw cap of the sealing element rests against the second projection in the closed state. This defines secure end positioning when screwing into the screw top.

The sealing element is preferably made of plastic, especially polyolefin such as PE or PP.

Cans can be made stackable by providing a notch in the sheet metal bottom opposite the sealing element in the foil lid, the indentation being shaped to receive the sealing element of another can on which the Stack the first can. In this way a stack of cans can be formed in which the cans can be stacked one on top of the other and secured against lateral sliding or tipping over, thereby subjecting the sealing element to undue loads.

Description of drawings

The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

Figure 1 shows a partial section of a can according to the invention;

FIG. 2 shows details of FIG. 1 .

Detailed ways

The can of FIG. 1 has a cylindrical wall 1 closed at the top by a sheet metal lid 2 provided with a sealing element 3 . The sealing element 3 consists of a bottom part 4 and a screw cap 5 screwed into the bottom part 4 .

The bottom part 4 comprises a plate 6 on which is formed an annular cylindrical downward extension 7 constituting a retaining part. The plate 6 continues beyond the diameter of the retaining portion 7 as a flange, referred to herein as a second protrusion 8 . Below the second projection 8 there is arranged a first projection 9 which is likewise annular.

A safety cover is provided in the plate 6 , which can be torn off by means of a pull ring 11 . On the one hand, this provides an additional measure of safety against spilling or contaminating the contents before the can is opened for the first time, and on the other hand, it allows the user to determine whether the can is in original condition or has already been opened.

The edge region 12 of the foil cover 2 around the opening in which the sealing element 3 is inserted is formed by a first tapered portion 13 tapering towards the inside of the can and extending between a circular flange 17 and a circular edge 20, the circular edge 20 is the boundary of the opening. The first tapered part 13 is connected to the second tapered part 14 , and the second tapered part 14 is combined with another tapered part 15 at another folded edge 19 .

The rounded edge 20 is pressed against a groove 21 of the holding part 7 under a preset load, said groove 21 being formed around the periphery of the cylindrical downward extension 7 between the first protrusion 9 and the second protrusion 8 . The rounded edge 20 rests on the bearing shoulder 16 of the first protrusion 9 . Due to the preload, a reliable sealing of the sealing element 3 to the foil lid of the can is guaranteed.

Since the axial width of the groove 21 and the height of the tapered portion 13 are almost equal, the flange 17 abuts against the underside 18 of the second protrusion 8 .

On the underside opposite the bearing shoulder 16 , the first projection 9 has a beveled region 22 . Thus, the sealing element 3 can be attached to the can in a simple manner during production by snapping it into the opening of the foil lid 2 . The first tapered portion 13 expands elastically and locks into the groove 21 after sliding over the first protrusion 9 . When the can is discarded, the sealing element 3 can be detached from the can in a simple manner.

The invention will allow the manufacture of strong resealable containers in a simple manner, thereby obtaining high practical value.

Claims (11)

1. be particularly useful for the can of beverage, described can has: substantially cylindrical wall (1), and the top of described cylindrical wall and bottom are by sheet metal lid (2) sealing that is incorporated into wall (1) separately; Packing element (3), described packing element (3) inserts the opening of sheet metal lid (2) and allows the resealable ground of can to open, opening in the wherein said sheet metal lid (2) is cut first tapering part (13) encirclement of awl and extension between the circular flanging (17) of opening and circular edge (20) by what described sheet metal cover (2) to described can inside, and described packing element (3) is provided with the retaining part (7) of substantially cylindrical, described retaining part (7) inserts the opening of sheet metal lid (2) and has circumferential groove (21), described circumferential groove (21) admits first tapering part (13) of sheet metal lid (2) and second projection (8) that is resisted against by described flanging (17) to constrain on the direction that deviates from can, it is characterized in that the screw-top (5) of described packing element (3) is resisted against described second projection (8) under closed state.

2. can as claimed in claim 1, it is characterized in that, the circumferential groove (21) of described retaining part (7) is retrained in the axial direction by first projection (9), and described first projection (9) has supporting shoulder (16) and tapered in side opposite with described supporting shoulder (16) in a side of described groove.

3. can as claimed in claim 1 or 2 is characterized in that, circumferential groove (21) width vertically of described retaining part (7) is corresponding with the axial width of first conical part (13) of sheet metal lid (2).

4. as any one described can of claim 1-3, it is characterized in that second tapering part (14) of cutting awl along the direction that deviates from can is disposed radially the outside at described first tapering part (13).

5. as any one described can of claim 1-4, it is characterized in that described opening is arranged in the limit of described sheet metal lid (2) and adjacent described sheet metal lid (2) prejudicially.

6. as any one described can of claim 1-5, it is characterized in that described packing element (3) is made of single-piece base section (4) and screw-top (5).

7. can as claimed in claim 6 is characterized in that, described packing element (3) has can tear apart the safety cap (10) that opens.

8. can as claimed in claim 7 is characterized in that, described tear safety cap (10) be its edge form described flanging (17) against the part of plate (6) of second projection (8).

9. as claim 7 or 8 described cans, it is characterized in that, go up to form at described safety cap (10) and tear draw ring (11).

10. as any one described can of claim 1-9, it is characterized in that described packing element (3) is made by plastics, especially polyolefin.

11. any one described can as claim 1-10, it is characterized in that, the lower metal thin slice lid that is oppositely arranged with the sheet metal lid that is loaded with packing element has the recess that shaped design becomes to admit the packing element of another can, and described another can overlays on first can.

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