MX2009000240A

MX2009000240A - Can.

Info

Publication number: MX2009000240A
Application number: MX2009000240A
Authority: MX
Inventors: Walter Bock; Gerhard Schroll
Original assignee: Walter Bock
Priority date: 2006-06-29
Filing date: 2007-06-28
Publication date: 2009-03-02
Also published as: CA2652952A1; PL2035294T3; CA2652952C; AT503831B1; BRPI0713982A2; DE502007006507D1; US20090173736A1; JP2009541162A; WO2008000013A1; ATE498561T1; EP2035294B1; EP2035294A1; CN101479163B; CN101479163A; ES2361126T3; AT503831A1

Abstract

The invention relates to a can, especially for receiving drinks, comprising an essentially cylindrical casing (1) which is closed on each end thereof by means of a cover plate (2) connected to the casing (1), and a closing element (3) which is provided in a recess of a cover plate (2) in order to be able to open the can in a recloseable manner. The recess of the cover plate (2) is surrounded by a first section (13) of the cover plate (2), said section being in the form of a truncated cone, tapering off towards the inside of the can and extending between a circular bent edge (17) and a circular edge (20) which defines the recess. The closing element (3) has an essentially cylindrical holding section (7) which is inserted into the recess of the cover plate (2) and comprises a peripheral groove (21) which receives the first truncated cone section (13) of the cover plate (2) and is defined towards the outer side of the can by a second projection (2) on which the bent edge (17) is supported. When the can is closed, a screw closure (5) of the closing element (3) is supported on the second projection (8).

Description

CAN DESCRIPTION OF THE INVENTION The invention relates to a container or can, especially for beverages with an essentially cylindrical wall, which is closed in its upper and lower part by metal sheet covers attached to the wall and with a sealing element which is inserted into an opening in the metal foil cover and allows the releasable opening of the can, wherein the opening in the foil cover is surrounded by a first conical part of the foil cover tapered towards the inside of the can which extends between a circular crease edge and the circular edge of the opening and wherein the sealing element is provided with an essentially cylindrical retaining section, which is inserted into the opening of the metal foil cover and has a peripheral groove which receives the first conical part of the metal sheet cover and which is attached in the direction away from the can p or a second projection against which the fold edge rests. The beverage cans of the state of the art have sealing elements which are opened by rupture, by the user, to open the can. Usually said openings can not be released. Various others are known sealing elements which allow the opening and release of the can. However, these elements are difficult to manufacture and susceptible to failure if they are produced in large quantities and therefore constitute a source of problems. The patent of E.U.A. No. 2,687,831 A shows a can with a sealing element that snaps into a corresponding retainer. A sealing element of this type is suitable for holding a spigot but is not able to withstand the forces and moments that arise in a threaded type closure. Additional closures with insufficient strength are described in the patent of E.U.A. No. 3,998,354 A and the patent of E.U.A. 4,327,842 A. An object of the present invention is to propose a can with a releasable sealing element that is simple and inexpensive to manufacture and easy to handle. The sealing element must be particularly robust and must not prevent the storage or disposal of the can. In particular, the forces and moments that arise in the opening of the can must be supported reliably. According to the invention there is provided a threaded cap of the sealing element which abuts against the second projection in the closed state. Appearance It is essential for the invention that the sealing element be simply and reliably inserted into the opening of the metal foil cover. The result is a kind of snap connection which allows relatively easy insertion of the sealing element into the opening if the dimensions are properly selected, but which also guarantees a secure housing of the element. At the same time, a liquid tight seal will be provided which will prevent the undesirable spillage of the C content from the can. Particularly reliable operation of the sealing element together with the sturdiness of construction will be obtained if the threaded cap of the sealing element provides against the second projection in the closed state. This will provide a secure end placement when the cap is screwed. The assembly of the can will become particularly easy if the peripheral groove of the fastening section is joined in axial direction by a first projection which has a support flange on the groove side and is conical on the opposite side. In this way, the sealing element will slide easily through the edge of the opening before insertion into the opening without causing permanent deformation. A particularly secure accommodation The sealing element will be obtained by providing the peripheral groove of the fastening section with a width in the axial direction corresponding to the axial extension of the first part. Conical metal sheet cover. This will eliminate the play or play in the axial direction of the sealing element. This will be of particular advantage in this case if the peripheral groove of the fastening section joins in a direction away from the can by a second projection against which the fold edge rests. It has been found to be particularly advantageous if a second conical part which is radially adjacent to the first conical part and tapered in a direction away from the can is provided on the outside of the first conical part. This will increase the spring effect which provides enough elasticity to prevent damage when the sealing element is inserted, even when hard plastic materials are used. From the point of view of material strength, it is a particular advantage if the opening is placed eccentrically in the metal foil cover, i.e., immediately adjacent to the edge of the cover. This will also allow the user to completely drain the contents of the can. A particularly simple design is obtained if the The sealing element consists of a base part of a single piece and a screw cap. In the case of beverage cans it is often required that a security seal provides the possibility to discern whether the can still has its original seal or has been previously opened. A removable safety cover can fulfill this function. Advantageously, the safety seal is part of the plate whose edge forms the second projection against which the fold edge rests. As an alternative, it is also possible to provide a screw cap with a ring indicating misuse, as used in beverage bottles. A robust design and reliable operation is obtained if the threaded cap of the sealing element bears against the second projection in the closed state. This defines a secure end position when the cover is screwed. The sealing element is preferably made of a plastic material, in particular of a polyolefin such as PE or PP. The can can be made stackable by providing a recess in the lower part of the metal sheet opposite the sealing element in the metal foil cover, which is shaped to receive the sealing element of another can on which the first can can be stacked. In this way, stacks of cans can be formed in which the cans rest on one another and lateral sliding or tilting is prevented without exposing the sealing elements to undue loads. The invention will be further described in the following, with reference to the embodiment shown in the appended drawings. Figure 1 shows a partial section through a can, according to the invention; and Figure 2 shows a detail of Figure 1. The can of Figure 1 has a cylindrical wall 1 which is closed at the top by the metal sheet cover 2 which is provided with a sealing element 3. The sealing element 3 consists of a base part 4 and a threaded cover 5 which is screwed onto the base part 4. The base part 4 comprises a plate 6 on which an annular cylindrical descending extension 7 is formed forming a retaining section. Beyond a diameter of the retaining section 7, the plate 6 continues as a ridge which is referred to herein as a second projection 8. Below the second projection 8 a first projection 9 is provided which is also cancel . A safety cap is provided on plate 6 which can be detached by means of a ring 11. On the one hand, this will provide additional safety by preventing splashing or contamination of the contents before the can is opened for the first time, on the other hand , allows the user to determine if the can is in a clean condition or if it has been opened before. The edge area 12 of the metal foil cover 12, which surrounds the opening into which the sealing element 3 is inserted, consists of a tapered first conical section 13 in the inward direction of the can and extending between a circular folding edge 17 and a circular edge 20, which is the limit of the opening. The first conical section 13 is connected to a second conical section 14 which in turn is joined to another conical section 15 in another additional fold edge 19. The circular edge 20 presses under preload against a groove 21 of the retaining section 7 which in turn surrounds the periphery of the descending cylindrical extension 7 between a first projection 9 and a second projection 8. The circular edge 20 makes contact against the flange 16 of support of the first projection 9. Due to the "pre-loaded ensures a reliable seal of the element 3 sealant against the metal sheet cover 2 of the can. Since the axial width of the groove 21 and the height of the conical section 13 are approximately equal, the fold edge 17 makes contact against the underside 18 of the second projection 8. The first projection 9 has a beveled area 22 on its side lower opposite the support flange 16. In this way, the sealing element 3 can be attached to the can during production in a simple manner by adjusting it under pressure within the opening of the metal sheet cover 2. The first conical section 13 is elastically expanded and, after sliding over the first production 9, is fixed in the groove 21. When the can is discarded, the sealing element 3 can be separated from a can in a simple manner. The present invention will allow the manufacture of a sturdy releasable container in a simple manner and in this way a high practical value is obtained.

Claims

CLAIMS 1. Can, especially for use with drinks, with an essentially cylindrical wall which is closed at the top and bottom by a metal sheet cover, each attached to the wall and with a sealing element which is inserted inside an opening in the metal foil cover and allows the releasable opening of the can, wherein the opening of the foil cover is surrounded by a first conical portion of the foil cover tapered towards the inside of the can and which extends between a circular crease edge and the circular edge of the opening and wherein the sealing element is provided with an essentially cylindrical retaining section, which is inserted into the opening of the metal foil cover and has a peripheral groove, the which receives the first conical part of the metal sheet cover and is joined in a direction away from the can by a second projection against which the fold edge is supported, characterized in that a threaded cap of the sealing element makes contact against the second projection in the closed state.
2. Can as described in claim 1, characterized in that the peripheral groove of the retaining section is joined in the axial direction by a first projection, which has a support flange on the side of the groove and which is conical on the opposite side of the support flange.
Can as described in claim 1 or 2, characterized in that the width of the peripheral groove of the retaining section in the axial direction corresponds to the axial extension of the first conical part of the metal foil cover.
Can as described in any of claims 1 to 3, characterized in that a second conical part, which is tapered in the direction away from the can, is provided radially outwardly of the first conical part.
5. Can as described in any of claims 1 to 4, characterized in that the opening is positioned eccentrically in the metal foil cover and is immediately adjacent to the edge of the foil cover.
6. Can as described in any of claims 1 to 5, characterized in that the sealing element consists of a base part of a single piece and a screw cap.
7. Can as described in claim 6, characterized in that the sealing element It has a safety cap which can be opened by detachment.
8. Can as described in claim 7, characterized in that the detachable safety cap is part of a plate whose edge forms the second projection against which the fold edge contacts.
9. Can as described in any of claims 7 or 8, characterized in that a detachment ring is formed on the safety cap.
10. Can as described in any of claims 1 to 9, characterized in that the sealing element is made of a plastic material, especially a polyolefin.
11. Can as described in any of claims 1 to 10, characterized in that the sheet metal cover opposite the metal sheet cover that has the sealing element has a recess which is shaped to receive the sealing element of another can on which the first can can be stacked.