MXPA98008136A - Cap to close a recipe - Google Patents

Abstract

The present invention relates to a lid for closing a container neck, with a lid base and a lid wall, which inside is provided with a guide rail of a bayonet thread, formed by ridges projecting inwards, the guide rail can be brought into contact with holding lugs on the outside of the neck of the container, the guide rail having a locking position for the gas flow before the cap is completely unscrewed, and the locking position of the rail is formed guide means for at least one locking edge, which limits the unscrewing movement in such a manner, that during the entire gas flow process the guide rail is in contact with the entire fastening surface of the fastening beads, characterized in that Each flange has four sections, of which two horizontal sections have no inclination, so that a first horizontal section defines a posi The sealing portion and a second horizontal section define a gas flow position, the locking flange being disposed on at least one flange, at the end of the second horizontal section remote from the first horizontal section at the surface directed towards the bottom of the container. can

Description

LID TO CLOSE A CONTAINER FIELD OF THE INVENTION The invention relates to a lid for closing a container, in accordance with the generic term of claim 1.

BACKGROUND OF THE INVENTION Particularly in containers in which high internal pressures are present, for example due to beverages containing carbonic acid, care must be taken that when removing the lid, the internal pressure can escape before the lid is removed by full. In the covers hitherto known, for this purpose, on the inner side of the lid aeration slots are arranged, which allow a gas flow at a time when the lid is still largely attached to the neck of the container . If this type of ventilation slots is not foreseen, there is a danger that, due to the high internal pressure, the cover jumps before the opening time during the opening process. A disadvantage of this known lining arrangement is that both the thread inside the lid and outside the neck of the container require large wall parts, and thus, a greater use of material, which leads to high costs of production. Another disadvantage is that the lid must always be partially opened so that the thread is partially out of contact before the pressure compensation takes place. Thus, at the time of this, the lid is no longer completely in contact with the neck of the container, which implies the danger that the lid jumps over the thread.

US Pat. No. 5,135,124 proposes for the reduction of the consumption of material, a lid that is provided in its interior with two different types of fastening elements. With the first fastening elements, the lid remains stuck to the container in the closed state. Upon opening, the lid moves to a deaerated position, where it is held in union with the container by two fasteners. However, this cover has the disadvantage that during the transition from the sealed position to the deaerated position, during a certain time, it is only partially in contact with the fastening elements of the neck of the container. Thus, there is again the risk of a jump before the cover time, without a complete pressure compensation having taken place between the interior of the container and the environment. In addition, due to the different types of fasteners, this type of caps are expensive to manufacture.

OBJECTIVES AND ADVANTAGES OF THE INVENTION The object of the invention is to avoid the known disadvantages, that is, in particular to achieve a lid for closing a container with high internal pressure, which can be produced in a simple manner and with low consumption of material, and that it still reliably avoids a leap before the cover time during the opening process. According to the invention, this objective is achieved with a lid having the properties of the characterizing part of claim 1. The lid for closing a container with high internal pressure, consists essentially of a lid and a lid wall, which inside is provided with a guide rail of a bayonet thread. The guide rail can be brought into contact with fastening beads on the outside of the neck of the container and has a locking position for the gas flow before completely unscrewing the cover. The interlocking position of the guide rail is formed according to the invention by at least one locking edge. This limits the unscrewing movement in such a way that the guide rail is in contact during the entire gas flow process with the entire clamping surface of the clamping beads on the neck of the container. Thanks to the interlocking edge, it is not possible during the opening process to move the cover beyond the locking position before a full pressure compensation has taken place. Nevertheless, as the lid in the locking position remains in full contact with the fastening beads on the outside of the container neck, the danger of a jump ahead of time during the gas flow process is not greater than with the lid closed . With the proper size of the lid to avoid jumping in the closed state, the cap jump during the gas flow process is also reliably avoided. The guide rail can be formed, for example, by two or more ridges projecting from the inside of the lid wall inwards. The surface of said flanges directed to the bottom of the lid, forms the clamping surface with which the lid coactuates with the clamping heels on the outside of the neck of the container. Between said surface and the side of an adjoining ledge directed towards the bottom of the lid, the guide rail is defined. In a particularly preferred embodiment, the guide rail is defined by four ridges, that is, the guide rail consists of four partial rails. Each lane is between two flanges. With a provision like this, the clamping heels are guided in a precise manner during the screwing or opening process. In this way, a jam is also reliably avoided. Each flange extends over an angular range of about 160-200 °, preferably 180 °. By means of a regular arrangement of the four flanges in the periphery, an overlap of respectively two contiguous flanges of approximately 90 ° results. In a particularly preferred embodiment, each flange is formed by four sections. Two of these sections have no inclination and extend horizontally, that is, parallel to the bottom of the lid. The other two sections have an inclination. This is necessary to press the lid from an open position to a sealed position. When the lid is in contact by the first horizontal section with a fastening heel of a container neck, a sealed position is defined. A gas flow position is defined by the second horizontal section. Both horizontal sections are joined to a section that extends obliquely, so that by screwing the lid between the gas flow position and the sealed position, by tipping, the necessary sealing pressure can be achieved. The second obliquely extending section is disposed at the beginning of each flange and allows easy introduction of the fastening lugs into the guide rails. The interlocking edge is preferably arranged at the end of the second horizontal section remote from the first horizontal section. In order for the unscrewing movement of the lid to stop until a complete pressure compensation is achieved, the locking edge is arranged on the surface facing the bottom of the lid of at least one flange. So that when placing the lid there are no binding compilations, the four flanges must be the same. However, it is also conceivable to provide only one flange of an interlocking edge. In order to interrupt the unscrewing movement as reliably as possible, preferably each flange has an interlocking edge as above. Advantageously, the second horizontal section is longer than the first. The length of the second horizontal section defines the angular zone of the rotary movement, in which a gas flow takes place. The longer the second horizontal section, the more comfortable it will be unscrewed for the user. If the cap is unscrewed with a relatively slow rotary movement, a second long horizontal section achieves pressure compensation, before the container neck fastening heels reach the locking edge. In this case, the user almost does not feel the limit of unscrewing movement. A slight pressure on the lid is sufficient to overcome the locking edge. InsteadIf the lid is unscrewed quickly, the clamping hems reach the locking edge before a complete pressure compensation. In this way the opening movement of the lid is stopped and the rotating movement of the user's hand also stops. While the pressure compensation has not been completed, it is not possible to overcome the locking edge. Due to the still high internal pressure, the lid can not be pressed down to overcome said edge. Necessarily you must wait until a full or almost complete pressure compensation is reached. It has been observed that a second horizontal section, which extends through an angular area of 55-70 °, preferably 65 °, with a normal unscrewing speed of the lid, hardly causes an abrupt stop of the unscrewing movement due to the interlocking edge. The distance between two contiguous flanges, preferably, is not kept constant over the entire length thereof. In particular, the distance between the sections that extend horizontally is chosen less than the distance between the two sections that run obliquely. In this way it is intended that the guide heels can be guided regularly by the guide rails formed between the ridges. This results in a minimum distance between the flanges in the area of the locking edge. The maximum distance between two flanges is reached in the area of the sections that extend obliquely. The above is necessary, since the fastening heels on the outside of the neck of the container may have a certain lateral expansion and would jam in case of oblique sections too close. In another embodiment, each flange can be provided on a lower side opposite the bottom of the cover, in the region of the locking edge of the respective lower flange, of a recess. In this way, the guide of the clamping heels in the guide rails is additionally raised. Thus, the distance between the horizontal sections of two contiguous flanges can be chosen in such a way that the intermediate space matches the thickness of the fastening beads of the container to be closed.

BRIEF DESCRIPTION OF THE DRAWINGS Next, the invention is illustrated with the help of the drawings and exemplary embodiments. Figure 1 is a schematic presentation of a lid according to the invention and a container neck. Figure 2 is a cross section through a cover according to the invention. Figure 3 is the unwrapped projection of the inside of the lid of Figure 2. Figure 4 is an enlarged section of the unwrapped projection of Figure 3. Figure 5a is the unwrapped projection with indicated clamping heels, in the position of sealed. Figure 5b is the projection unwrapped with indicated fastening heels, in a deaerated position. And Figure 6 is a section of an unwrapped projection of an alternative embodiment.

DETAILED DESCRIPTION OF THE INVENTION Figure 1 shows a lid 1 and a container neck 2 that can be closed with it. The lid 1 consists essentially of a lid bottom 3 and a lid wall 4 arranged on the outer edge of the lid bottom 3.

In the interior 5 of the lid wall 4 a guide rail 6 is provided, which can be brought into contact with fastening lugs 7 on the outside 8 of the container neck 2. The guide rail 6 is delimited by rims 11. To limit the unscrewing movement and to define an interlocking position for the gas flow, the guide rail 6 has interlocking edges 9. These are arranged on each flange 11 on the side of the flanges 11 directed towards the bottom of the pipe. lid 3. The whole shaping is designed in such a way that during the entire gas flow process, the lid 1 is stopped by the entire clamping surfaces 10 of the clamping heels 7. The number of rims 11 can vary in each case, although three to six flanges 11, but particularly four, usually guarantee optimum handling and safe action. Figure 2 shows a cross section through the lid according to the invention. In Figure 2, the locking edge 9 which limits unscrewing movement can be clearly seen. The lid 1 also has a sealing skirt 17. Figure 3 shows an unfolded projection of the interior of the lid of Figure 2. The guide rail 6 consists of four partial guide rails, which are formed by four rims 11. Each of them has an interlocking edge, which limits the unscrewing movement. In Figure 4, the path of the ridges 11 can be seen with precision. Each of them has two sections 13a, 13c that extend with an inclination, as well as two horizontal sections 13b, 13d that extend without inclination. The first horizontal section 13d defines a sealing position and the second horizontal section 13b, a gas flow position. Both horizontal sections 13b, 13d are joined together with the section 13c extending with inclination. The locking edge 9 is arranged at the end 14 of the second horizontal section 13b remote from the first horizontal section 13d, on the surface of the flange 11 facing the lid base. The section 13a that extends with inclination defines the beginning of the thread and thanks to its oblique position facilitates the introduction of the clamping heels at the beginning of the screwing movement. The obliquely extending section 13c produces the sealing pressure necessary for sealing with a sealing device not shown in detail (eg, a sealing skirt 17 as shown in Figure 2 and / or an inner or outer seal not shown). The distance between two contiguous flanges 11 is not constant over the entire length. In an area 16 of the sections 13a, 13c that extend obliquely, the distance between the flanges 11 is greater than in a zone 15 with the horizontal sections 13b, 13d. The above is necessary for a slightly longer elongated heel (heel 7, as shown in Figure 1), do not get stuck in zone 16 of sections 13a, 113c that extend with an inclination. The minimum distance between two flanges 11 is defined by the locking edge 9. Figures 5a and 5c show an unwrapped projection of the interior of a lid according to the invention, with fastening lugs 7 shown schematically, of a container lid in a sealing position (Figure 5a) and in a gas flow position (Figure 5b). In the sealing position, the horizontal sections 13d are in contact with the clamping heels 7. For the screwing-up movement to be limited, after the horizontal sections 13d there comes a final section 20 respectively. This is also formed in this case as oblique section, so that together with the lower oblique section 13c, it forms a guide rail 6 defined with precision. However, in principle it is conceivable to shape the final section 20 vertically. In the opening process, the fastening beads 7 pass from the sealing position shown in Figure 5a to the deaerating position shown in Figure 5b. By means of the sections 13c extending with an inclination, the entire cover is raised, that is to say also the sealing device not shown, whereby, in the case of high internal pressure, a gas flow results. The movement of the fastening heels is limited by the interlocking edges 9. While in the container closed by the lid a high internal pressure reigns, this keeps the flanges 11 with their surface directed to the bottom of the lid, pressed against them. clamping heels 7. Only when the internal pressure has been completely eliminated, the lid can be pressed slightly downwards, which allows the interlocking edges to be overcome 9. An alternative embodiment of the rail design is shown in Figure 6. guide 6. The first horizontal section 13d has on its side opposite the bottom of the lid, a recess 18, which is vertically aligned with the locking edge 9. With a construction like this, the width of the guide rail 6 between two horizontal sections 13b, 13d, can be reduced in such a way that it matches the thickness of the fastening beads on the outside of a container. With an arrangement like this, the clamping heels are guided with precise adjustment through the guide rail 6.

Claims (10)

1. NOVELTY OF THE INVENTION Having described the foregoing invention, it is considered a novelty, and therefore, the content of the following is claimed as property: CLAIMS - 1. A cover for closing a container neck, with a cover bottom and a cover wall, which inside is provided with a guide rail of a bayonet thread, formed by ridges that protrude inwards, being able to put contacting the guide rail with holding lugs on the outside of the neck of the container, the guide rail having a locking position for the gas flow before the cap is completely unscrewed, and the interlocking position of the guide rail is formed at least one locking edge, which limits the unscrewing movement in such a manner, that during the entire gas flow process the guide rail is in contact with the entire fastening surface of the fastening beads, characterized in that, Each flange has four sections, of which two horizontal sections have no inclination, so that a first horizontal section defines a sealing position and a second The horizontal section defines a gas flow position, the locking flange being disposed on at least one flange, at the end of the second horizontal section remote from the first horizontal section on the surface facing the bottom of the lid. A cover according to claim 1, characterized in that the guide rail is formed by at least two of the flanges projecting radially inward from the inside of the lid wall, being able to pass through the intermediate space between respectively two contiguous flanges, one fastening heel of a container neck. 3. A cap according to claim 2, characterized in that the guide rail is formed by four flanges. 4. Device according to claim 3, characterized in that each flange extends through an angular zone of 160-200 °, preferably 180 °. A cover according to claim 3 or 4, characterized in that two contiguous flanges overlap in an angular area of approximately 90l'O 6. A cover according to claim 1, characterized in that the second horizontal section is longer than the first horizontal zone. A lid according to claim 6, characterized in that the second horizontal section extends through an angular zone of 55 ° to 70 °, preferably 65 °. A cover according to claim 1, characterized in that the distance between two contiguous flanges is in an area of the horizontal sections, smaller than in an area of the sections. A cover according to claim 1, characterized in that the distance between two contiguous flanges in the region of the locking edge has a minimum value. A cover according to claim 2, characterized in that each flange, on the lower side opposite the bottom of the cover, has a recess that is aligned with the locking edge of the lower flange.