EA009267B1 - Sealing means for a closure, closure and process - Google Patents

Abstract

The present invention is directed to a sealing means (2) for sealing of a neck (25) of a container, especially a container for carbonated beverages. The sealing means comprises a radially deformable outer sealing means (20) suitable to be engaged with an outer free surface (17) of a neck (25) of the container. The outer sealing means (20) comprises an annular base (22) which blends by a blend (34) into a vertical top surface (35) and at least one annular sealing ring (23) arranged at a free end of the annular base (22), protruding radially inwardly above the inner surface of the base (22) and forming in engaged position with the neck (25) a first contact area (30) with the outer free surface (17).

Description

Field of Invention

The invention relates to sealing means for closures, especially sealing means for closures for packaging for liquids such as beverages. In particular, the invention relates to sealing means for containers for carbonated liquids, such as soft drinks. But it is also suitable for sealing other containers, such as glass or PET containers with contents above or below atmospheric pressure, or which have gas components or require sealing means. The invention further relates to a shutter and a method for manufacturing and using a sealing means, respectively a shutter.

BACKGROUND OF THE INVENTION

Seals are generally made of several types of plastic, such as polyethylene (from this place PE) or polypropylene (from this place PP), or materials based on DFB, such as Iageh ™ gasket material. It is mainly used for the production of cushioning shutters; The material is less hard and less durable than PE. Often, softer materials such as low density PE (LEP), ethylene vinyl acetate (EUL), or compounds based on polyolefin raw materials are used as sealing materials. Stiffer materials, such as polypropylene, are often used as the sheathing material of the closures.

A large number of documents on analogues are available from the prior art that relate to closures and caps for sealing containers. Next, the selected row is explained.

EP0076778 A1beg (0bg15 (AO was filed in 1982 and describes a shutter cover made of plastic material that has a circular external sealing edge whose thickness is continuously decreasing from its free end. The external sealing edge is placed in the hinge area between the external vertical skirt and the disk-shaped the upper part and is directed obliquely inward. In its smallest diameter, the sealing edge has a rounded sealing part. Below the sealing part, the sealing edge is funnel-shaped irene outward to receive the opening of the container, however, due to the inclined placement of the sealing edge, it often deforms when donned, especially when the curvature is placed on the neck of the container. A further disadvantage is that, due to the inclined placement, this seal is relatively rigid and therefore not very good when adjusting laterally.

84489845 was filed in 1984 and was assigned to A1beg1 0bg1b1 AO. I84489845 is directed to the screw cap to close the opening of the container. The lid has a sealing edge that is attached to the top of the lid. The inner side wall of the outer sealing lip has a larger diameter than the outer diameter of the outer wall of the container. The clamping device, which can be described as an internal seal, compresses the top of the cap when the screw cap is screwed onto the container due to deformation of the outer shell of the shutter. In this way, the sealing edge will be pressed against the neck of the container. So the sealing edge will only be radially pressed to the neck of the container when screwing. This will prevent excessive stretching and damage to the material of the sealing edge. In the engaged position, the sealing lip covers the upper outer rim of the neck of the container opening. One drawback is that the described shutter deformation relates to extensive forces. Another disadvantage is that the outer shell tends to break due to excessive stress and deformation (stress cracking), resulting in a complete shutter rupture and loss of product.

EP0114127, filed in 1984 Soybean! Neck! A1 ^ Y! Esar, and EP0176205, filed in 1985 8th Juice! P1ak! 1s, describe a seal with two sealing flanges, which are arranged mainly in a U-shape. When the shutter is put on the container, the flanges are deformed according to the cross-section of the sealing surface of the container, including down into the neck of the container and down along the outer surface of the opening of the neck to ensure effective sealing contact with the sealing region of the container. Sealing flanges and valves in the engaged position are supported on the sides and pressed against the valve neck.

EP0529383, filed in 1992 by 1AbO Vegd OT, is aimed at a plastic screw cap for containers, in particular pressure beverage containers. The shutter includes an annular sealing strip, which is seamlessly soldered to the shutter shell. A collar is adjacent to the sealing strip, which presses the sealing strip against the upper outer edge of the container neck. The disadvantage is the reduced lateral adjustment ability.

EP0770559, filed in 1996, 8ast1 Soorega! Yui Messai1s1, is directed to a plastic screw cap with a gasket, which is manufactured by compression molding. The shutter consists of an annular edge that supports the lining and protrudes from the disk-like part concentrically with respect to the cylindrical outer wall. The annular edge acts as a shoulder for the sealing lining, so that when the cap is screwed onto the container, the lining engages with the rim of the container neck.

I84489844 was filed in 1982 and assigned to Syag1ek A. Vgekks Akkos. 1 fig. It is directed to a reusable lid for closing containers of carbonated drinks or the like. The shutter consists of a sheath with an internal thread that has a closure that

- 1 009267 metically covers the throat of the beverage container at its free edge. The shell and closure are made of different plastic materials and are molded in different parts of the same molding cavity. First, a closure is formed, and then, without moving the means from the position in which it was formed, a casing is formed to create an integral structure in which significant parts of the casing are placed in the casing.

I85447674, filed in 1993 by Frank Shelenbach, aims at a method and molding rod for the production of a two-component plastic shutter formed by molding. The mold core for use in the two-component injection molding method is presented for the two-component injection molding of plastic closures for containers. The molded core consists of the first and second rods. After the first substance is introduced, one core or element is displaced by a certain distance relative to the first formation. One drawback of the described procedure is that the displacement of the rod can only occur when the material of the first stage is sufficiently solidified, resulting in a significant delay. Another disadvantage is that the geometry of the shutter and seal is significantly limited due to the shape function. Another disadvantage is that the seal cannot include a radial protrusion, which would be the result of cutting the mold due to the fact that the displacement of the mold core would no longer be possible.

ν003011699, filed in 2002 by Vepsar, is aimed at the shutter cover, which consists of an inner skirt that is significantly trimmed and converges from the base of the sealing skirt to the free end of the sealing skirt. The inner part of the sealing skirt is designed to contact the outer part of the throat. The inner diameter of the sealing skirt in the direction of its part with the free end is designed smaller than the outer diameter of the throat. As described, the closure may consist of an annular U-groove to improve the adhesion of the gasket to the throat rim or the contact between the gasket and the rim.

A series of closures for carbonated beverage containers is known from the inventor of the invention described herein, which are described in \ U099 / 03746 (1998), \ ν099 / 03747 (1999), ^ 089/12584 (1989), \ ν003 / 022701. ν000 / 56616, ν000 / 56615. All gaskets of these closures have the common fact that the annular sealing rim, which first protrudes downward and inward with respect to the upper part of the closure, turns out when put on the neck of the container.

The problem of closures is known from previous analogues and lies in the fact that the gasket of these closures often bursts under high internal pressure and the contents result from bloating or removal of the upper part of the lid. This problem can especially happen with caps that are sealed primarily on the inner peripheral surface or on the annular upper surface of the neck of the container. Another problem that often happens with closures, which is known from analogues, is the leakage of the gasket due to the high internal pressure in the container and the additional load that is applied to the top of the valve, for example, due to the storage of several containers. The reason for this can be found in the deformation of the shutter and the associated offset gaskets. Another known problem with closures is that the gasket breaks due to the curve of putting the shutter on the neck of the container.

The aim of this invention is to provide a sealing means for closures, especially closures for containers for carbonated drinks and other hot or cold liquids, which has an improved ability to adapt to the neck of containers, especially the neck of containers with certain defects or damage.

Another objective of this invention is to provide a sealing means and closure that are suitable for carbonated drinks and other hot or cold liquids to provide manufacturing benefits such as shorter cycle times and less material consumption while maintaining tightness at high internal pressures and top loads .

Description of the invention

A closure that has a sealing means according to this invention is suitable for use with containers that have a standardized throat. The standardized throat includes an external peripheral surface with an external thread. The outer peripheral surface is adhered to the edge surface with an annular upper surface that forms the upper end of the container when it is upright. Between the annular upper surface and the external thread, the external free space extends to a length of approximately 1-3 mm of the throat, which is not threaded and suitable for sealing. Also, the neck of the container has a cylindrical inner peripheral surface that abuts the annular upper surface.

In addition to the sealing means of the present invention, the closure generally comprises a base with a disk-shaped upper part and an adjacent outer skirt with fixing means, such as an internal thread, which is suitable for engaging with suitable locking means, such as the external thread of a standardized neck of a container, as described above. If appropriate, the shutter may have a hinged lid that is connected to the base of the shutter and is suitable to seal the opening.

Mostly plastic shutter material - high density polyethylene, polyethylene

- 2,009267 low density polypropylene or a combination thereof. Where a container is used for carbonated liquids, the plastic material has predominantly very low gas permeability.

The sealing means described here comprises, in a first embodiment, a substantially P-shaped cross section. The sealing means comprises a cylindrical skirt that extends perpendicularly from the disk-shaped upper part of the shutter to the middle of the shutter, radially separated from the outer skirt of the shutter by a gap of a certain width and depth. The inner skirt, which generally has a leg shape with respect to its cross section, which stands freely, is directed downward and is regulated sideways, near its base, mainly directly connected to the top of the shutter. In the region of its opposite lower free end, the inner skirt passes into at least one toroidal sealing ring that projects above the lateral surface of the cylindrical skirt. The toroidal sealing ring interacts in a closed position radially from the outside with the outer free surface of the neck of the container on the specified contact surface, and this contact surface is located as far below the free surface of the neck of the bottle as possible to reduce the effects of known problems, such as bloating, damage to the bottle near the upper outer rim, raising the shutter. The cylindrical skirt acts as the basis for the toroidal sealing ring and has a length that prevents the negative interaction of the toroidal sealing ring with the thread of the neck of the container. The at least one toroidal sealing ring advantageously has such a shape that it seals primarily due to ring stress. Therefore, the sealing means is preferably free even in a radially deformed position when putting a container on the throat. In a preferred embodiment, the gap between the inner and outer skirts is such that there is no contact between the sealing means and the outer skirt.

The toroidal sealing ring has a protrusion that faces the neck of the container and defines the contact area. Unlike the known analogues, which are mainly affected by ring pressure or root bending forces, the sealing means of this invention, which is freely perpendicular, mainly seals with ring forces of tension that arise in a toroidal sealing ring when putting a container on the throat . The sealing means is able to compensate for a certain amount of lateral and / or radial displacement or twisting of the neck of the container. A cylindrical skirt that acts as a base provides some flexibility in the lateral and / or radial direction. Achieve good results in that the ratio of the vertical length to the radial thickness of the base of the sealing means, which is placed between the upper part of the shutter and the toroidal sealing ring, is at least 1: 1, preferably 4: 1. Depending on the application, such ratios as the radial thickness, the shape of the base of the sealing means, and the radial thickness of the annular sealing ring, and the ratio of the vertical length to the radial thickness of the annular sealing ring, and the gap between the inner and outer skirts are important.

In a further structural embodiment, the gasket has a generally U-shaped cross section in which the P-shaped cross section passes inside into the inner upper surface of the shutter. The said transition is such that it forms a second sealing region with the surface of the neck of the container, which causes the pressure of the surface of the edge of the neck to the transition that the annular sealing ring extends inward to the outer free surface of the neck of the container. The reason is the controlled deformation of the base. Depending on the application, the transition smoothly connects the base to the upper surface with a concave shape with a radius or ramp shape, or a curved shape that protrudes outward.

In a preferred embodiment, the ratio of the radial thickness of the sealing ring to the base is 2: 1 or 3: 1 (other factors may be used depending on the application). The ratio of the vertical free length of the sealing ring to its radial thickness is mainly from 1: 1 to 4: 1. Other ratios are appropriate depending on the application. The cross-sectional shape of the gasket ring and the eccentricity of the contact surface relative to the base of the sealing means is important for the application, since these parameters affect the distribution of ring stress forces.

The shape and placement of the base of the sealing means are relevant to the function of the sealing means. For example, if the base of the sealing means is tilted relative to the top of the shutter, putting the shutter on the opening of the container becomes heavier and ruptures due to mismatch are likely. One reason for this is that the distribution of forces and the initial expansion of the gasket become heavier.

In a preferred embodiment, the sealing means and the shutter are manufactured by injection molding, respectively, by two-component injection molding in a multicomponent form in which the sealing liner is made in this way. The first plastic material is injected in liquid form into the first void on the rod. The first material that forms the lining hardens. After that, the lining with the first rod is displaced into the second void, where

- 3 009267 inject a second material for the outer shell of the shutter. In this way, the liner sealing material and the outer shell material are connected.

To optimize the production process, the region in the void of the sealing gasket, which does not contact the first rod, is advantageously shaped so that the sealing gasket can be removed from the first void without maintaining voltage. Therefore, grooves that interfere, which mainly extend perpendicular to the direction of displacement of the rod, are avoided. By the described injection formation, a firm adhesion of the gasket to the sheath material is obtained. In contrast to the two-component valves known from the previous analogues, which are made by compression molding, the invention described here has the result of more reliable sealing. The problems that typically occur when disassembling the closures made by compression forming, when the shutter shell is made first and the sealing gasket second, do not happen with the invention described here. The outer shell is predominantly made of polypropylene (PP) or high density polyethylene, and the gasket is made of a softer material such as EUA, BERE. or a complex material based on polyolefin raw materials. Also, the embodiment of the shutter design consists of sealing means that interacts with the outer peripheral cylindrical surface without thread, which is located between the thread and the annular upper surface of the neck of the container. A preferred embodiment of the sealing means for sealing the neck of the container consists of a radially deformable external sealing means that is suitable for contact with the external free space of the throat. This external sealing means generally has a P-shaped cross-section with an annular base and a sealing ring at the free end of the annular base, which radially extends inward above the inner surface of the base and forms a first sealing region with an outer free surface in the engagement position with the throat.

In another preferred embodiment, the external sealing means has a B-shaped cross section. Near the base, a transition is arranged that connects the base to the vertical top surface of the shutter. The transition may form in a locked position the sealing means and the throat of the second sealing area between the outer surface of the throat and the external sealing means. External sealing can be formed so that the interaction between the outer surface and the transition of the external sealing means is so controlled deformed that the sealing ring is pressed more tightly against the outer free surface of the throat. Depending on the application, the transition can take many forms: for example, a ramp-shaped cross-section, a convex cross-section or a concave cross-section. When the junction is designed as a smooth connection, it advantageously has a radius B greater than the radius of the outer surface of the neck of the container.

In yet another embodiment, the sealing means may consist of a gasket. The cushion may consist of an inner skirt that extends vertically along the outer downward leg. A sealing ring can be placed on the end of the inner skirt.

The sealing means may consist of a hole seal, which may be made of cushioning material and have a core of shell material.

Brief Description of the Figures

The sealing means and the shutter according to this invention are explained in more detail in accordance with the preferred embodiment.

FIG. 1 shows a shutter with sealing means in a general view from below.

FIG. 2 shows the shutter of FIG. 1 in a general view from above.

FIG. 3 shows a shutter with a first embodiment of a sealing means in a side view.

FIG. 4 shows a cross section through the shutter of FIG. 3 along the line AA.

FIG. 5 shows part B of FIG. 4.

FIG. 6 shows a shutter with a second embodiment of the lateral sealing means;

FIG. 7 shows a cross section through the shutter of FIG. 6 along the SS line.

FIG. 8 shows a detail Ό of FIG. 7.

FIG. 9 shows a shutter with a third embodiment of the lateral sealing means.

FIG. 10 shows a cross section of the shutter of FIG. 9 along the line EE.

FIG. 11 shows a detail E of FIG. 10.

Detailed Description of Preferred Designs

FIG. 1 shows a shutter 1, which consists of a sealing means 2 according to the invention in an isometric view from below, and FIG. 2 - the same shutter 1 from a perspective side view from above. The shutter 1 consists of an outer skirt 3, which extends perpendicularly from the disk-shaped upper part 4. The outer skirt 3 has vertically placed protrusions 5 from the outside, which provide better traction with the shutter. Inside, the outer skirt 3 has a thread 6, which consists of thread segments 7. At its lower end, the outer skirt is connected to the tear strip 8. The tear strip 8 of the illustrated embodiment has the same outer diameter as the outer shutter skirt 3. Tear-off inside

- 4 009267 strip 8 has cut segments 9 that radially protrude inward and have a generally spherical lower part 10. When putting the shutter on the neck of the container (not visible), the spherical cut segments support the alignment and alignment of the sealing means with respect to the neck of the container. Therefore, the tear gap can be significantly reduced. Above the cut segments 9, centering elements 11 are placed, which radially protrude above the inner surface 15 of the tear strip 8. They are placed along the ζ axis of the shutter and help center the shutter 1 relative to the closure of the neck of the container. Therefore, the tilt of the tear strip when opening the shutter 1 is reduced.

The tear-off strip 8 is connected to the outer skirt 3 of the shutter 1 by brittle bridges 12, which break when the shutter 1 is opened. The tear-off strip 8 is separated from the skirt 3 of the shutter by a gap 13. The bridges 12 are located in the shown embodiment in cavities 14 that extend over the length of the bridges 12 and thereby help to avoid unwanted rupture of the bridges 12 when donning the shutter 1.

FIG. 3 shows yet another embodiment of the shutter 1 in a side view. The shutter 1 consists of a tear strip 8 with a smaller outer diameter than the skirt 3 of the shutter 1. The tear strip 8 has a shoulder 16, which serves as a contact point when the shutter 1 is ejected. The bridges 12 are similar to the shutter according to FIG. 1 and 2 and are located in depressions 14. A section along line AA is shown in FIG. 4.

FIG. 4 shows a section through the shutter 1 and sealing means 2 along line AA of FIG. 3, and FIG. 5 shows part B of the sealing means 2 of FIG. 3 enlarged view. In FIG. 5 schematically shows the throat 25 (dashed line). The sealing means 2 of the shown embodiment is shown in an undeformed form and includes an external side gasket 20 and a U-shaped upper gasket 21, which protrudes from the inner surface of the disk-shaped upper part 4 of the shutter 1 perpendicularly inside the shutter 1 and is placed so that it interacts in the closed position with the end surface 27 of the throat 25. The side gasket 20 has a P-shaped cross section and has a base 22 and a sealing ring 23 that protrudes radially deep into the base 22, which fits I to seal the outer peripheral surface 17 of the throat 25 in the area without thread above the thread 26. The side gasket 20 is located radially distant from the skirt 3. In the shown embodiment, the gap 24 with the walls parallel to the undeformed state extends vertically between the side gasket 20 and the outer skirt 3 of the shutter 1 , determining the external free length b of the gasket 20. The thickness ΐ of the gap 24 is chosen such that the sealing ring 23 and the base 22 can freely extend in the radial direction g + when putting the shutter on the throat 25 The vertical length b of the base 22 of the side gasket 20 is chosen such that the sealing ring 23 is placed as far as possible along the free length of the outer vertical surface 17 of the neck 25 above the start of the outer thread 26 of the container. The contact zone is located on the PET container, depending on the beginning of the thread, which is 0.5-2 mm below the annular end surface of the throat. Thus, the effect of bloating or other deformation of the shutter 1 can be minimized so that the gasket 2 becomes more reliable. The horizontally flexible and vertically rigid base 22 of the side gasket 20 ensures that the sealing ring 23 can be adjusted even when the side gasket 20 is put on the neck of the container, which is eccentric, especially in the radial direction. The radial protrusion p of the sealing ring 23 above the base 22 is important for engagement with the throat 25. To obtain a radial sealing force, the inner diameter Ό of the sealing ring 23 is smaller than the outer diameter Ό of the neck of the container. If necessary, the vertical position of the sealing means 2 relative to the throat 25 defines an additional stop.

FIG. 6 shows a side view of the shutter 1; FIG. 7 shows a cross section of the shutter along the line CC, and FIG. 8 shows a detail Ό of FIG. 7 enlarged view. The common shutter device 1 responds to the shutter as described in accordance with FIG. 1-5. The explanation of such similar details as the outer skirt, tear strip and thread is not repeated again, but a reference is made to these figures.

As can be seen in FIG. 8, a side gasket 20, which in this embodiment has sealing means 2 of a P-shaped cross-section, is radially distant from the outer skirt 3. An annular gap 24 with side walls parallel in the undeformed state extends vertically between the side gasket 20 and the outer skirt 3 of the shutter 1. The gap 24 is selected such that the sealing ring 23 and the base 22 can deform, at least initially freely in the radial direction r when putting the gaskets on the throat 25 (shown schematically in dashed lines). The vertical length b of the base 22 of the side gasket 20 is adjusted so that the sealing ring 23 is placed as far as possible down the free length 17 of the outer vertical surface of the neck 25 in the embodiment shown immediately above the start of the thread 26. In the put on position between the sealing means 2 and the neck 25, the first a sealing zone 30, wherein the sealing ring 23 is pressed against the outer free surface 17 of the throat 25 due to lateral stretching. As you can see, the base 22 passes inside the transition 34, which has a radius P here, into the vertical top surface 35 of the shutter 1. The transition 34 has such a shape that it forms a second sealing area / contact area 31, so that in the closed position it has a tight contact with the extreme surface 28, which connects the outer free over

- 5 009267 17 and the annular upper surface 27 of the throat 25. The radius K. is generally larger than the radius of the extreme surface 28, so that the exact interaction zone is determined. When putting the sealing means 2 on the throat 25, the sealing ring 23 of the outer gasket 20 first contacts the annular upper surface 27 and / or the extreme surface 28 of the throat 25. With further use, the sealing ring 23 is pulled while it slides on the outer free surface 17 of the throat 25, installing the first contact zone 30. In a further procedure, the sealing ring 23 and the first contact zone 30 slide down the outer free surface 17 of the throat 25, while the transition 34 is in contact with the outer extreme surface 28 of the throat 25, establishing the second contact zone 31. By the fact that the extreme surface is pressed against the inner root (transition 34) of the outer gasket 20, schematically indicated by the arrow P, it is achieved that due to the geometry, the sealing ring 23 retracts under controlled shutter deformation (schematically is indicated by an arrow g) and the more tightly it is pressed against the outer free surface 17, so that sealing is improved. The functional relationship between the first and second contact zones is schematically indicated by arrow a. Before the second contact zone 31 is installed, the base 22 of the outer strip 20 is adjusted laterally and left in its final position when the second contact zone 31 is installed. This ensures that when using the sealing means 2 before installing the second contact zone 31, all the advantages are execution as described in FIG. 3-5. And in the final position when establishing the second contact zone 31, when the outer gasket 20 is thereby closed, an improved sealing is obtained.

As you can see, the sealing ring 23 protrudes above the inner lateral surface of the base 22. The protrusion 33 has a circular cross-section in the shown embodiment, which forms the first contact zone between the sealing ring 23 and the outer free surface 17, but allows the cavity to form. The sealing ring 23 has a funnel-shaped first lead-in surface 29, which is suitable for the first contact between the outer gasket 20 and the throat 25, and acts as a ramp for the sealing ring 23 so that it easily slides onto the outer free surface 17.

The shown sealing means 2 is equipped with a gasket for the hole 36, which in the closed position is immersed in the hole of the throat 25. The cover for the hole 36 has a conical shape that extends from its root, where it is connected to the disk-shaped upper part 4 of the shutter 1, against its free end radially outward at an angle α. The cross-section of the gasket base 37 for the hole 36 is generally V-shaped at an angle β, which has its apex in the region of the free end. The gasket 36 has a funnel-shaped second inlet surface 38, which ensures easy insertion of the gasket 36 in the opening of the throat 25. The gasket adjacent to the second inlet surface 38 has a toroidal contact surface 39, forming in the closed position the third contact zone 32 between the sealing means 2 and the inner the lateral surface 41 of the throat 25. As you can see, the sealing means 2 is shown in an undeformed state and overlaps with the geometry of the throat 25. However, it is clear that the shutter 1 suction pours to the throat 25 due to the elastic deformation of the closure material. The inner diameter Ότ of the gasket of the hole 36 is selected so that the gasket of the hole 36 does not interact with the throat of the shutter in the area of its base. When donning the toroidal sealing means 20 over the throat 25, the gasket of the hole 36 is folded in depth in the r direction so that it adapts to the inner diameter Όί of the hole of the throat 25. In the embodiment of the invention described here, the installed third contact zone 32 is at the same vertical level ( direction ζ), as the first contact zone 30 of the outer strip 20. With this opposite device at the same level, the throat 25 is held tight, resulting in increased density and sealing. The ventilation angle of the shutter can be changed to the active length b, which corresponds to the distance between the 3rd contact zone 32 and the root of the gasket 36. To obtain a long ventilation angle, increase the active length b of the gasket 36, and to reduce the lower ventilation angle (ventilation the angle corresponds to the angle by which the shutter must be turned before the gas exit). Depending on the application, you can do without laying.

The sealing means has in the area or adjacent to the intermediate upper surface 35 a ν-shaped protrusion (not shown in detail) that forms the upper gasket (4th contact zone / sealing area) and interacts in the closed position with the upper surface 27 of the throat 25.

FIG. 9 shows an embodiment of a shutter 1, which has a sealing device according to the invention in a lateral form, made by a two-component injection formation. FIG. 10 shows a cross section of the shutter of FIG. 9 along line EE, and FIG. 11 shows a detail P of FIG. 10 enlarged view.

A detailed explanation of how best to make the sealing means, as shown in FIG. 9-11, made entirely in international patent application PCT / EP2005 / 051559 of the same inventor who is the author of this invention, and is included with all design options in this patent application.

Now, attention is directed to FIG. 11. The cross section and functionality of the sealing means 2 - as shown in FIG. 8, with one difference, that the sealing means 2 is made here of two

- 6 009267 materials (shell material and cushioning material). Therefore, regarding functionality, refer to FIG. 8 and an explanation to it. In contrast to the shutters described in accordance with FIG. 1-8, the shutter sealing means 2 of FIG. 9-11 is made of two materials, mainly a two-component injection formation. The outer shell 45 (the disk-shaped upper part 4 and the outer skirt 3) is made of shell material, and the sealing gasket 46 is made of a gasket material that covers all surfaces that come into contact with the liquid of the container that is being sealed. The outer shell 2 of the shutter 1 is mainly made of polypropylene (PP) or high density polyethylene (HDPE), the gasket 46 is mainly made of a softer material, such as Oateh ™. The outer shell 45 and the gasket 46, as shown here, are tightly connected to each other along their boundary surfaces 49, 50 so that it is possible to safely put on and place the sealing means 2.

The base 22 of the sealing means 20 has an outer downward leg 47 made of sheathing material that supports and stabilizes the inner skirt 48 and a toroidal sealing ring 23 made partially of cushioning material and placed at the end of the base 22 in horizontal and vertical directions. As you can see, the gasket 46 extends in the xy direction along the inner upper surface 35 of the shutter 1 and down along the outer leg 47 (direction ζ). The inner skirt 48 passes through the transition 34 to the vertical upper surface 35. The inner skirt 48 and the inner base 22 are shown in an undeformed state, but will stretch radially outward when putting on the throat of the shutter. The vertical boundary surface 49 between the outer downward foot 47 of the seal 46 and the inner skirt 48 of the illustrated embodiment is generally straight and slightly tapered so that the seal 46 can be easily removed from the mold after being formed in the first step. Depending on the application, the limiting surface may have a different shape, such as line 8 shows, so that the lower end of the outer strip 20 is made entirely of shell material and only the lower leg 47 supports it.

As explained in connection with FIG. 8, the sealing means may have a U-shaped protrusion (not shown in detail) adjacent to the intermediate upper surface 35, which forms the upper gasket (4th contact zone) and interacts in the closed position with the upper surface 27 of the throat 25 (see FIG. 8).

The sealing means 2 has, in the shown embodiment, a gasket for the hole 36, which has, in contrast to the embodiment shown in FIG. 6-8, olive-shaped cross section. As can be seen, the gasket of the hole 36 is integrated into the disk of the gasket 46. The gasket of the hole 36 may have a portion of shell material to provide increased lateral support. Alternatively or in addition, side ribs (not shown in detail) may support the gasket of the hole.

Claims (21)

CLAIM 1. A means of sealing (2) for sealing the throat (25) of a container, characterized in that this means of sealing (2) has: a) an external means of sealing (20) with the possibility of radial deformation, which is suitable for coupling with the external free surface (17) of the throat (25), b) an external sealing means (20), which has a P-shaped cross-section with c) a ring base (22), and b) a sealing ring (23) on the free end of the annular base (22), which projects radially inward over the inner surface of the base (22) and forms in the adhered position with the throat (25) the first sealing area (30) with a free outer surface (17) . 2. The means of sealing (2) according to claim 1, characterized in that the external means of sealing (20) has a P-shaped cross-section, the transition of which (34) is placed near the base (22) and connects the base (22) with a vertical upper surface (35). 3. Means sealing (2) according to claim 2, characterized in that the transition (34) forms, in the engaged position, the means of sealing (2) and the throat (25) the second sealing area (31) between the extreme surface (28) of the throat (25) and an external sealant (20). 4. Means of sealing (2) according to claim 3, characterized in that the external means of sealing (20) has such a shape that, by the interaction between the final surface (28) and the transition (34), the external means of sealing (20) is deformed in a controlled way so that the annular sealing ring (23) is pressed more tightly against the outer free surface (17) of the throat (25). 5. Means sealing (2) according to one of claims 3 or 4, characterized in that the transition (34) has a ramp-like cross-section. 6. Means sealing (2) according to one of claims 3 or 4, characterized in that the transition (34) has a convex cross section. 7. Means sealing (2) according to one of claims 3 or 4, characterized in that the transition (34) has a concave cross-section. - 7 009267 8. Means sealing (2) according to claim 7, characterized in that the transition (34) has a radius of K, greater than the radius of the extreme surface (28). 9. Means sealing (2) according to one of the preceding paragraphs, characterized in that the means of sealing (20) has a gasket (46) of gasket material. 10. Means sealing (2) according to claim 9, characterized in that the external sealing means (20) has an inner skirt (48), which extends vertically (ζ) along the outer downward-directed legs (47). 11. Means sealing (2) of claim 10, characterized in that the annular sealing ring (23), made of gasket material, is placed on the end of the inner skirt (48). 12. Means sealing (2) according to one of the preceding paragraphs, characterized in that the means of sealing (2) has a gasket holes (36). 13. A means of sealing (2) according to claim 12, characterized in that the gasket of the opening is made of a gasket material. 14. Means sealing (2) according to item 13, characterized in that the gasket of the hole (36) has a rod made of shell material. 15. Means sealing (2) according to one of claims 12, or 13, or 14, characterized in that the gasket of the hole (36) has a base of conical shape, which projects radially outward at an angle (α), and a conical shape of the introduction surface, which are interconnected by a toroidal contact surface (39) located in the region of the largest diameter of the gasket of the hole (36), and this base has a thickness that continuously decreases against its lower free end. 16. Means sealing (2) according to one of claims 12, or 13, or 14, characterized in that the gasket of the hole (36) has an olive-shaped cross-section. 17. The shutter (1), characterized in that it contains a means of sealing (2) according to one of the preceding paragraphs. 18. The bolt (1) according to claim 17, characterized in that it contains a gasket (46) made of a gasket material, strongly adhered to the shell of the bolt (45) made of a shell material by a two-component injection molding. 19. The method for putting on the shutter (1) having a means of sealing (2) according to one of claims 1 to 8, on the throat (25) of the container, characterized in that it contains the following stages in which: a) align the shutter (1) above the throat (25); b) pressing the shutter (1) against the throat (25) prior to contact between the external sealing means (20) and the extreme surface (27) of the throat (25); c) slide the bolt (1) against the throat (25) so that the sealing ring (23) stretches circumferentially until it slides onto the outer free surface (17) of the throat (25) and a sealing area (30) is formed. 20. The method according to claim 19, characterized in that the shutter (1) is moved relative to the throat (25) until the second sealing area is established between the extreme surface (27) and the transition (34). 21. The method according to claim 20, characterized in that the outer surface (27) is pressed to the transition (34), whereby the external sealing means (20) is deformed in a controlled way so that the sealing ring (23) is pressed more tightly to the outer free surface (17 ).