Pt Closing Device for Containers

• US 20080105641A1
• Filed: 07/29/2005
• Published: 05/08/2008
• Est. Priority Date: 07/30/2004
• Status: Active Grant

• Current Assignee: Silgan Holdings Incorporated
• Original Assignee: Silgan Holdings Incorporated
• Inventors: Pfromm, Carsten, Dobbelstein, Peter
• Granted Patent: US 7,946,438 B2
• Time in Patent Office: Days
• US Class Current: 215/253
• CPC Class Codes: B65D 2543/00092 circular
• CPC Class Codes: B65D 2543/00277 Metal
• CPC Class Codes: B65D 2543/00527 NO contact
• CPC Class Codes: B65D 2543/00537 on the outside, or a part turned to the outside of the mouth of the container
• CPC Class Codes: B65D 2543/00564 indirect by means of a gasket or similar intermediate ring
• CPC Class Codes: B65D 2543/00962 inserted
• CPC Class Codes: B65D 41/3438 the tamper element being formed separately but connected to the closure
• CPC Class Codes: B65D 43/0283 only on the outside, or a part turned to the outside, of the mouth of the container B65D43/0279 takes precedence

Abstract

The invention relates for the easy mounting a closing means on or for a closure lid made of sheet metal which is to be opened by means of twisting. It comprises a lid panel (10), a skirt portion (20) at the edge of the lid panel (10) and a sealing layer (25), which extends between a circumferential section of the lid panel and into the skirt section (25a, 25b). A safety ring (40, 30) made of non metal comprises two circumferentially extending sections. There is provided a safety section (40) with a shaped strip portion (41) that extends radially inwards and upwards and a connecting section (30) for affixing the safety section (40) to an axially lower end of the skirt portion (20). The lower end (21, 21a) of the skirt portion, which is rolled up by more than 180° is at least partly clasped (31, 32, 32a, 32b) by the connecting section (30) from an inner side of the skirt portion.

Claims

1. A closing means on or for a closure lid made of sheet metal which is to be opened by means of twisting, which comprises

(1) a lid panel (10);

(2) a skirt portion (20) on the edge of the lid panel (10);

(3) a seal (25;

25a;

25b) which extends from a circumferential section of the lid panel (10) into the skirt portion;

(4) having a safety ring (40, 30) made of nonmetal which comprises two circumferentially extending sections which are designed as

(4a) a safety section (40) with a shaped (radially) inwards and (axially) upwards projecting strip section (41);

(4b) a connecting section (30) for attaching the safety section (40) on an axially lower end of the skirt portion (20);

(5) wherein the lower end (21) of the skirt portion, which is rolled up by more than 180°

, is at least partly clasped (32, 32a, 32b) or is claspable by the connecting section (30) from an inner side of the skirt portion.

2. The closing means according to claim 1, wherein a substantially horizontal plane (E) extends substantially through a center of the roll-up (21) and the clasping takes place at least from the inner side of the lid, but from the outer side of the roll-up.

2b. b. The closing means according to claim 2, wherein the clasping ends axially above the plane (E), and in particularly clearly extends beyond the plane at the inner side of the lid.

3. The closing means according to claim 1, wherein the connecting section (30;

32) or its claspability (32, 32b′

, 32c) of the rolled up end (21) extends at the outer side of the lid up to substantially the height of the level (E) as the central plane of the roll-up (21).

3a. a. The closing means according to claim 1, wherein the strip portion is foldable or folded.

3b. b. The closing means according to claim 1, wherein the end of the skirt portion is rolled up inwards towards the interior of the skirt portion.

4. The closing means according to claim 1, wherein the safety section (40) is coupled to the connection section (30) through distributed weakened connecting webs as a thin place (42), said thin place being designed in such a weak or only in such a thick fashion that it can be ripped off or will break upon an opening of the closure lid that is caused by a twisting by at least one axial tensile force component, in particular also a circumferential force component.

5. The closing means according to claim 1, wherein the clasping (32) of the roll-up (21) which takes place from the interior takes place through nose sections (32a, 32d) which extend circumferentially in a section-wise fashion, which are circumferentially spaced.

6. The closing means according to claim 5, wherein each nose portion (32a, 32d) has a bent inner surface that is suitable to receive the roll-up (21).

7. The closing means according to claim 1, wherein the roll-up (21) extends in a rolled up fashion from radially outwards towards radially inwards, in particular by more than 270°

, preferably by substantially more than 315°

.

8. The closing means according to claim 1, wherein the connecting section (30) engages with holding forces substantially at the roll-up without applying axial forces (tension forces) to a projecting intermediate section (29) of the skirt portion (20).

9. The closing means according to claim 1, wherein the clasping—

or the ability of the connecting section (30) to be able to clasp (=claspability)—

is more than 150° and

less than 300°

.

14. The closing means according to claim 1, wherein the gripping area and/or the connecting section (30), but not the metallic roll-up (21), are radially resilient in order to permit an axial slipping on and exert radial locking and clamping forces after the slipping on and to prevent dropping off.

15. The closing means according to claim 1, wherein a clasping connection between the gripping area (30) and the roll-up of the lower end of the skirt portion (20) is reinforced, in particular by means of a welding or sealing or by means of pressure and/or heat.

16. The closing means according to claim 1, wherein the safety ring (30, 40) has a radially inwards pointing annular surface (35) that points radially inwards and extends substantially in a circumferential fashion in the height area of the connecting section (30).

17. The closing means according to claim 16, wherein the annular surface (35) extends across a height that is greater than a diameter of a roll-up (21) being the edge section that is remote from the panel (10).

18. The closing means according to claim 16, wherein the annular surface (35) has an inner diameter which, in the closed condition of the closure lid on the body, only has a small distance (a) from a wall section (81, 81a) facing the circumferential surface in order to lock an axially downwardly directed detachment of the safety ring (30, 40) from the roll-up (21).

19. The closing means according to claim 16, wherein a semi-circumferential clasping above a central plane of the remote edge section formed as roll-up (21) on the holding section (20) extends radially farther to the outside (b) than the distance (a) of the annular surface (35) is from the wall section (81 a) of the container to be closed.

23. The closing means according to claim 1, wherein the connecting section is adapted to engage at the rolled up lower end of the skirt portion in a self-retaining fashion by means of positive locking, in particular also by means of a frictional connection.

24. The closing means according to claim 2, wherein the clasping takes place in three quadrants of the roll-up, and, in particular, the third quadrant is completely occupied.

25. The closing means according to claim 24, wherein practically the complete second quadrant and/or practically the complete fourth quadrant is occupied by the gripping section (32, 32a, 32b, 32c).

27. The closing means according to claim 1, wherein the seal is a sealing layer (25a, 25b).

10. A closure lid for a container (80) that is open at the top with an upper open end (90) and an upper outer wall (81a) which is to be closed with the lid, wherein the lid comprises a lid panel (“

panel”

;

10), a circumferential transition section (12) and a holding section (20) extending substantially vertically relative to the extension of the panel (10), which forms a transition section (12), wherein

(i) an edge section (21) on the holding section (20) that is remote from the panel (10) is clasped by an at least partly clasping gripping area (32;

32a, 32b) of a safety ring (30, 40) by more than 150°

C.;

(ii) the safety ring comprises a section (40, 41) relative to the outer wall (81a) which locks against an opening caused by a twisting or pulling, which can be ripped off at least area-wise at a thin place (42).

11. The closure lid according to claim 10, wherein the clasping takes place with an angle (α

) of more than 160°

, in particular more than 220°

.

12. The closure lid according to claim 10, wherein the edge section (21) of the holding section is rolled up with an angle that is larger than 270°

, in particular larger than 315°

, up to a complete roll-up (21, 21a), in which a free end (21a) practically contacts a circumferential strip (28) of the skirt from the inside.

13. The closure lid according to claim 10, wherein the safety ring consists of two functional sections which are connected with each other in a tearable or breakable connection through several connecting points (42) in order to separate the locking section (41, 40) from the gripping area (30) of the safety ring by means of a tensile force which acts in an axial and/or at least semi-circumferential fashion.

26. The closing means according to claim 10, wherein the locking outer wall (81a) has an upper laterally pointing wall surface and/or a section (35) of the safety ring, which locks with respect to it, extends substantially vertically, alternatively substantially in parallel to the holding section (20), alternatively substantially vertically to the panel (10).

28. The closing means according to claim 10, wherein the locking section (40, 41, 35) has a radially inwards pointing annular surface (35) with which an evasion that is radially inwards directed to a too high extent can be prevented in order to lock a detaching of the non-separable area of the safety ring (30, 40) until the separable area of the safety ring (30, 40) is ripped off from the non-tearable area.

20. An auxiliary closing means on or for a closure lid made of sheet metal which is to be opened by means of twisting, which comprises

(1) a lid panel (10);

(2) a skirt portion (20) on the edge of the lid panel (10);

(3) a sealing layer (25) which extends from a circumferential section of the lid panel into the skirt portion;

(a) with a safety ring (40, 30) made of nonmetal which comprises two at least semi-circumferentially extending sections;

(aa) a safety section (40) with a shaped (radially) inwards and (axially) upwards projecting strip section (41);

(bb) a connecting section (30) for attaching the safety section (40) on an axially lower end of the skirt portion (20);

(b) wherein the connecting section (30) is designed in such a way that it engages the lower end (21, 21a) of the skirt portion, which is rolled up by more than 270°

from an inner side of the skirt portion at least partly (32;

32a, 32b).

21. The auxiliary closing means according to claim 20, wherein the safety section (40) is coupled with the gripping and connecting web (30) through several weak connecting webs (42), said connecting webs being designed in such a weak or only such a thick fashion that they tear or break at least partly due to an axial tensile force component, in particular in the case of an axial opening of the closure lid at which the closing means engages in a clamping fashion, which is caused by twisting.

22. The auxiliary closing means according to claim 20, wherein the connecting section (30) comprises an outwardly open retainer that extends at least partly in an arc-shaped bent fashion, which is capable of gripping around the roll-up (21).

29. A closure lid for a container (80) that is open at the top with an upper open end (90) and an upper outer wall (81a) which is to be closed with the lid, wherein the lid comprises a lid panel (“

panel”

;

10), a circumferential transition section (12) and a holding section (20) extending substantially vertically relative to the extension of the panel (10), which forms a transition to the transition section (12), wherein

(i) an edge section (21) on the holding section (20) that is remote from the panel (10) is clasped by an at least partly clasping gripping area (32;

32a, 32b) of a safety ring (30, 40) by more than 150°

;

(ii) the safety ring comprises a section (40, 41, 35) relative to the outer wall (81a) which locks against an opening caused by a twisting or pulling;

(iii) the section (40, 41, 35) comprises a tearable thin place.

30. A closure lid for a container (80) that is open at the top with an upper open end (90) and an upper outer wall (81), which is to be closed with the lid, wherein the lid comprises a lid panel (“

panel”

;

10), a circumferential transition section (12) and a holding section (20) extending substantially vertically relative to the extension of the panel (10), which forms a transition to the transition section (12), characterized in that

(i) an edge section (21) on the holding section (20) that is remote from the panel (10) is clasped by an at least partly clasping gripping area (32;

32a, 32b) of a safety ring (30, 40) by more than 150°

;

(ii) the safety ring comprises a section (40, 41) relative to the outer wall (81) which locks against an opening caused by a twisting or pulling, which can be ripped off at a thin place (42).

31. A process for closing a closing means on or for a closure lid made of sheet metal which is to be opened by means of twisting, which comprises

(1) a lid panel (10);

(2) a skirt portion (20) on the edge of the lid panel (10);

(3) a sealing layer (25) which extends from a circumferential section of the lid panel into the skirt portion (25a, 25b);

(4) with a safety ring (40, 30) made of nonmetal which comprises two circumferentially extending sections

(4a) a safety section (40) with a shaped (radially) inwards and (axially) upwards projecting strip section (41) that can in particular be folded or is folded;

(4b) a connecting section (30) for attaching the safety section (40) on an axially lower end of the skirt portion (20);

(5) wherein the lower end (21, 21a) of the skirt portion, which is rolled up by more than 180°

is at least partly clasped (31, 32, 32a, 32b) by the connecting section (30) from an inner side of the skirt portion.