RU2784628C1 - Threaded capping - Google Patents

Abstract

FIELD: glass containers capping.

SUBSTANCE: invention relates to threaded, predominantly metal, caps made with the possibility of capping glass containers without destroying the thread and shape of the caps, which ensures the stability of capping using capping heads of automatic filling lines for liquid products and increases the reliability and tightness of capping containers. Threaded lid 1 is designed to seal a container having a neck 3, on the outer surface of the rim 4 of which a thread 5 is made, containing protrusions 6 and depressions 7. The lid 1 includes a body 8 containing an end wall 9, a sealing gasket 10, an outer side wall 11 and an inner side wall 12, on the surface facing the rim 4, the thread 13 is made, containing protrusions 141, 142 and depressions 15, adapted to form a screw engagement with the projections 6 and depressions 7 of the thread 5 of the rim 4 of the container. The thread 13 of the inner wall 12 has a first profile, the diameter of the tops of the protrusions 141 of which is greater than the diameter of the bottom of the depressions 7 of the profile of the thread 5 of the rim 4 of the container and which is adapted to form a gap C in the screw engagement. At the same time, the thread 13 of the inner wall 12 is made with the possibility of deforming the protrusions 141 of the first profile within the gap C in the process of capping the container and forming the second profile of this thread 13, the diameter of the tops of the protrusions 142 of which is commensurate with the diameter of the bottom 7 of the profile of the thread 5 of the rim 4 of the container.

EFFECT: glass containers capping improvement.

13 cl, 3 dwg

Description

The present invention relates to threaded, preferably metal, closures for sealing various containers used after the contents have been filled into them.

The present invention can be used to seal various containers, such as glass, metal and plastic containers filled with various liquids, such as water, milk, juice, compote and the like.

The present invention can be used most effectively for sealing glass bottles, including those containing high-strength alcoholic beverages, such as vodka.

A screw cap is a cap having a thread that forms a helical engagement with the threads of the rim of the neck of a container, such as a bottle, and is used to protect and isolate bottled beverages from air ingress, contamination, possible oxidation of products and loss of aroma.

At present, for sealing containers with drinks, as a rule, metal threaded lids are used, containing two parts: a lid and a gasket, interconnected by assembly operations (for example, by pressing) and being in a functional structural unity.

To preserve the organoleptic properties of liquid products poured into containers, reliable sealing of containers is required to prevent the penetration of air or contaminants into products, oxidation of these products, loss of their aroma, and premature leakage of products from containers. To do this, it is necessary to exclude the possibility of violating the integrity of the lids and the possibility of uncontrolled destruction of their threads and shape, as well as to increase the stability of the capping process carried out by screwing the lids on containers using the capping heads of automatic high-performance lines for filling liquid products into containers, which significantly increases the reliability and tightness of the closure containers.

Metal screw caps are widely known in the packaging industry and are mainly used for hermetic sealing of various plastic and metal containers. For these caps, the thread of the side wall is equidistant (proportionate) to the thread of the rim of the bottle neck. Similar covers are widely available on the market, for example, https://www.alibaba.com/product-detail/China-Patent-Design-Metal-Screw-Tin_60756550062.html?spm=a2700.details.0.0.21f76575wJJzDE https:// www.alibaba.com/product-detail/Free-Smooth-Side-38-400-45_1600180386669.html?spm=a2700.wholesale.0.0.11082eaetSYsUM

Equidistant - equidistant, equidistant. Equidistant surface - a surface, the distance from which to some given surface at any point is constant. Dictionary of Russian synonyms. ASIS Synonym Dictionary. V.N. Trishin.

The whisks of well-known metal and plastic containers have fairly accurate dimensions. Dimensional tolerances are within ±0.1 mm. When sealing the said containers by screwing threaded caps onto the rims with the help of capping heads of automatic high-performance lines for filling liquid products into containers, the torque forces are set on these heads, which must overcome friction in the screw engagement of the protrusions and cavities of the threads of the rims of containers with protrusions and cavities of the internal thread side walls of the lids, as well as the friction of the ends of the necks of the containers against the gaskets placed between the ends of the necks of the containers and the inner surfaces of the end walls of the lid bodies. With the indicated dimensions of the rims of metal and plastic containers, the spread of the indicated torques of the tightening force of these lids is insignificant and varies within ± 10% of the average value. This ensures reliable capping of metal and plastic containers using the capping heads of automatic high-performance filling lines for liquid products into containers.

However, in recent years, in accordance with environmental requirements, reusable containers made of glass are more often used. At the same time, the well-known threaded caps, in which the thread of the side walls is equidistant to the thread of the rims of the necks of the containers, when screwing onto the rims of the necks of glass containers in the process of capping using the capping heads of automatic high-performance lines for filling liquid products into containers, they lose their stability, resulting in uncontrolled deformation (destructive collapse) of lids, in which the thread of each rim displaces the corresponding inner side wall of the lid down relative to the outer side wall and end wall, which violates the integrity of the lids and leads to uncontrolled destruction of their threads and shape. This excludes the stability of the capping process, carried out by screwing caps on glass containers using capping heads of automatic high-performance lines for filling liquid products into containers, and also excludes the reliability and tightness of capping glass containers, violates their functionality and appearance.

This is due to the fact that the tolerances on the diameters of the rims of glass containers and the spread of the specified torques of the forces required to seal glass containers, compared to the tolerances and torques described above for sealing metal and plastic containers, are much larger (usually for the diameters of the rims from 20 to 40 mm is ±0.35 mm). Under such conditions, the spread of torque forces required to seal glass containers is very large. Therefore, the capping heads of liquid container filling lines are adjusted with a margin of torque forces in order to overcome the maximum possible resistance to screwing caps under unfavorable conditions, for example, at the maximum dimensions of the finish of a glass container. However, in this case, the torsional torques installed on the capping heads of automatic high-capacity filling lines for glass containers having minimum finish dimensions significantly exceed the torsional torques required directly for given glass containers. As a result, on the capping heads of automatic high-performance filling lines, an excess of torque forces occurs, which moves the inner side (threaded) wall of the lid down relative to the outer side wall and end wall. As a result, the lid loses its stability, its shape is destroyed, which excludes the stability of the capping process carried out by screwing caps onto glass containers using capping heads of high-performance automatic lines for filling liquid products into containers, and also excludes the reliability and tightness of capping glass containers, violates them. functionality and appearance and creates the possibility of fixing the lid relative to the neck of the container until it is completely sealed.

A threaded lid (EP 2279809 A1) is known for sealing a container having a neck, on the outer surface of the rim of which a thread is made containing protrusions and depressions. This cover, chosen by us as a prototype, contains a body adapted to be placed outside the neck of the container and having an end wall, on the inner surface of which a gasket is placed, and an outer side wall, inside which the inner side wall is placed. On the surface of the inner side wall of the lid facing the rim, a thread is made, containing protrusions and cavities adapted to form a screw engagement with the protrusions and cavities of the container rim thread. The inner side wall of the lid has a U-shaped part connecting the outer and inner side walls and representing the rounded bottom edge of the lid. In this case, one branch of the U-shaped part belongs to the outer side wall, and its other part belongs to the inner side wall, and a transverse bottom of a given length is located between the said branches of the U-shaped part. Thus, at the bottom of the lid on the inner side wall, a rectilinear smooth branch of the U-shaped part is first made, above which the said thread is made, containing protrusions and depressions. In this case, the diameter of the smooth U-shaped part is greater than or equal to the diameter of the thread cavities on the inner side wall of the lid. On the outer surface of the neck of the container, an upper smooth part is made from below, and then a rim, on the outer surface of which a thread is made, containing protrusions and depressions. The outer diameter of the upper smooth part of the neck of the container is equal to the inner diameter of the thread of the rim of the neck of the container. In this case, the inner diameter of the thread of the inner side wall of the lid is equal to the outer diameter of the thread of the rim of the neck of the container. As a result, at the initial stage of capping the container, when the lid is only previously put on the neck, a large transverse gap is formed between the outer surface of the upper smooth part of the neck of the container and the smooth U-shaped part of the inner side wall of the lid, the presence of which leads to the possibility of transverse displacement of the lid relative to longitudinal axis of the neck of the container (lack of coaxiality of the lid and container). As a result, situations arise in which, for example, the thread of the inner side wall of the lid abuts against the end surface of the upper smooth part of the neck of the container or the bottom of the U-shaped part of the inner side wall of the lid abuts against the thread of the neck of the container. These situations exclude the possibility of formation of high-quality helical engagement of the protrusions and cavities of the thread of the inner side wall of the lid with the protrusions and cavities of the thread of the rim of the container, which leads to uncontrolled deformation of the lids both at the initial stage and in the process of further sealing the containers. This, in turn, excludes the stability of the capping process carried out by screwing caps onto glass containers using the capping heads of automatic high-performance lines for filling liquid products into containers, and also reduces the reliability and tightness of capping glass containers, disrupts their functionality and appearance, and creates the possibility fixing the lid relative to the neck of the container until the moment of complete corking.

In addition, to seal the gasket when sealing the container, the force from the threads of the inner side wall is transmitted through the inner side wall, the U-shaped part and the outer side wall to the end wall of the lid. In this case, the inner side wall works in compression. With an increase in the moment of tightening the lid on the neck of the glass container, which is required when sealing the latter, the inner branch of the U-shaped part loses its stability and deforms outward, taking a barrel-shaped shape, or deforms inward, taking a globoid shape. In the first case, the inner side wall may damage the outer side wall. In the second case, the inner side wall can reach the neck of the container and fix the lid relative to the neck of the container until it is completely sealed. This eliminates the possibility of high-quality helical engagement of the protrusions and thread cavities of the inner side wall of the lid with the protrusions and cavities of the thread of the rim of the glass container, which leads to deformation of the lid during the corking process. This, in turn, excludes the stability of the capping process carried out by screwing caps onto glass containers using the capping heads of automatic high-performance lines for filling liquid products into containers, and also reduces the reliability and tightness of capping glass containers, disrupts their functionality and appearance, and creates the possibility fixing the lid relative to the neck of the container until the moment of complete corking.

In addition, with this cover, the thread on the inner side wall cannot have more than one turn. In this case, the entire load (twisting torque) on the thread is distributed over the surface of this coil. As a result, when using caps made of soft materials, such as aluminum, when screwing caps onto the necks of corresponding glass containers on capping heads of automatic high-performance liquid filling lines, uncontrolled deformation of the thread profile of the inner side wall of the corresponding caps will inevitably occur. This will exclude the possibility of formation of high-quality screw engagement of the protrusions and thread cavities of the inner side wall of the corresponding lid with the protrusions and cavities of the rim thread of the corresponding glass container, which leads to deformation of the lid shape both at the initial stage and in the process of further capping of the container, which, in turn, , eliminates the stability of the capping process, carried out by screwing caps on glass containers using capping heads of automatic high-performance lines for filling liquid products into containers, and also reduces the reliability and tightness of capping glass containers, violates their functionality and appearance and creates the possibility of fixing the cap relative to the neck of the container until complete sealing.

In this case, when using lids made of a sufficiently rigid material, for example, tin, when the lid is screwed onto the neck of a glass container, the thread of the container neck inevitably breaks off. This leads to the destruction of the paint coating of the tin lid by glass fragments and the possibility of glass fragments falling into the product placed in the container, which can lead to harm to the consumer. At the same time, places on the cover with a broken paintwork are subject to corrosion, which leads to a lack of guarantee of product safety.

The design of these lids described in this way is of limited use in terms of material design. That is, there is no possibility of using these lids for sealing glass containers, for example, glass bottles with water, juices, vodka and similar liquids. In addition, there is no way to ensure the stability of the capping process, carried out by screwing caps on glass containers using capping heads of automatic high-performance filling lines for liquid products. This significantly reduces the reliability and tightness of sealing glass containers, excludes the preservation of their functionality and appearance and the possibility of fixing the lid relative to the neck of the container until the moment of complete sealing.

The present invention is based on the task of creating a threaded lid with such a design that will provide the possibility of sealing glass containers with these lids, exclude the possibility of violating the integrity of the lids and the possibility of destroying their thread and shape, which will ensure the achievement of the stability of the corking process carried out by screwing the lids on glass containers using capping heads of automatic high-performance lines for filling liquid products into containers, which will significantly increase the reliability and tightness of capping containers while maintaining their functionality and appearance and eliminating the possibility of fixing the lid relative to the neck of the glass container until the moment of complete capping.

This problem is solved by creating a threaded cap for sealing a container having a neck, on the outer surface of the rim of which there is a thread containing protrusions and depressions, while the threaded cap contains a body adapted to be placed outside the neck of the container and having an end wall, on the inner surface of which a sealing seal is placed. a gasket, an outer side wall and an inner side wall, on the surface facing the rim of which a thread is made, containing protrusions and cavities adapted to form a screw engagement with the protrusions and cavities of the thread of the rim of the container, while, according to the invention, the thread of the inner side wall of the lid has the first profile, the diameter of the tops of the protrusions of which is greater than the diameter of the bottom of the bottom of the thread profile of the rim of the container and which is adapted to form a gap in the screw engagement between the opposite surfaces of the tops of the threads of the threads of the inner side wall of the lid and the bottom of the thread cavities of the rim of the container At the same time, the thread of the inner side wall is configured to deform the protrusions of the first profile within this gap in the process of capping the container and forming the second profile of this thread, the diameter of the protrusion tops of which is commensurate with the diameter of the bottom of the thread profile recesses of the container finish.

The technical result of the invention consists in providing the possibility of sealing glass containers with these lids, eliminating the possibility of violating the integrity of the lids and the possibility of destroying their threads and shapes, which ensures the achievement of the stability of the corking process carried out by screwing the lids on glass containers using the capping heads of automatic high-performance liquid bottling lines. products, which significantly increases the reliability and tightness of capping containers while maintaining their functionality and appearance and excludes the possibility of fixing the lid relative to the neck of the glass container until the moment of complete capping.

This is due to the design of the screw engagement with the formation of the specified gap between the opposite surfaces of the tops of the thread protrusions of the inner side wall of the lid and the thread troughs of the rim of the glass container. This allows the thread of the inner side wall to be able to change the first profile within a given gap under the action of the torque applied to the lid in the process of capping the glass container, as well as the gradual formation of the second profile of this thread, the diameter of the protrusions of which is commensurate with the diameter of the bottom diameter of the thread profile recesses of the rim of the container. .

This ensures that there is no damage in the screw engagement of the threads of the inner side wall of the lid and the threads of the rim of the glass container during the sealing process. At the same time, the presence of the specified gap excludes the possibility of critical deformation of the lid, violating its functionality and appearance, and fixing the lid relative to the neck of the glass container until the moment of complete corking. This ensures the achievement of the stability of the capping process, carried out by screwing caps on glass containers using capping heads of automatic high-performance filling lines for liquid products, which significantly increases the reliability and tightness of capping glass containers while maintaining their functionality and appearance and eliminating the possibility of fixing the cap relative to the neck of the glass container until complete sealing.

In addition, the presence of this gap eliminates the possibility of loss of stability of the lid and deformation of the inner side wall with an increase in the moment of twisting the lid onto the neck in the process of sealing the glass container. Moreover, there is no critical deformation of the lid, which violates its functionality and appearance and fixes the lid relative to the neck of the glass container until the moment of complete corking, which ensures the achievement of the stability of the corking process carried out by screwing the lids onto glass containers using the capping heads of automatic high-performance filling lines for liquid products, which significantly increases the reliability and tightness of sealing glass containers while maintaining their functionality and appearance and eliminating the possibility of fixing the lid relative to the neck of the glass container until the moment of complete sealing.

At the same time, at the initial stage of capping a glass container using capping heads of automatic high-performance filling lines for liquid products, when the lid is only previously put on the neck, the surface of the upper smooth part of the neck of the container and the surface of the inner diameter of the thread of the inner side wall of the lid are centered with the formation of a minimum transverse play between these surfaces, which ensures the creation of high-quality helical engagement of the protrusions and cavities of the thread of the inner side wall of the lid with the protrusions and cavities of the thread of the rim of the glass container. This, in turn, ensures the achievement of the stability of the capping process, carried out by screwing caps on glass containers using capping heads of automatic high-performance filling lines for liquid products, which significantly increases the reliability and tightness of capping glass containers while maintaining their functionality and appearance.

In addition, the specified design of the screw engagement of the threads of the inner side wall of the lid and the threads of the rim of the neck of the glass container, when applying the torque of the cap on the neck of the glass container necessary for sealing the glass container, using the capping heads of automatic high-performance bottling lines for liquid products, provides a controlled change in the first thread profile the inner side wall of the lid, distinguishable from the thread profile of the rim of the container, within a specified gap. In this case, the first profile of the specified thread is gradually deformed with the help of the thread of the rim of the neck of the container in the process of capping the latter and the second profile of this thread is formed under the action of the torque applied to the lid in the process of capping the glass container. Moreover, the protrusions of the second thread profile of the inner side wall of the lid are pressed against the thread cavities of the rim of the glass container without destroying these threads. In this case, friction forces are formed that prevent the rotation of the lid relative to the neck of the container in excess of what is necessary. Under the action of these frictional forces, the rotation of the lid stops, which, in turn, prevents critical deformation of the lid, violating its functionality and appearance. In this case, there is no fixation of the lid relative to the neck of the glass container until the moment of complete corking. This ensures the achievement of the stability of the capping process, carried out by screwing caps on glass containers using capping heads of automatic high-performance filling lines for liquid products, which significantly increases the reliability and tightness of capping glass containers while maintaining their functionality and appearance and eliminating the possibility of fixing the cap relative to the neck of the glass container until complete sealing.

Moreover, when the lid is screwed onto the neck of the glass container, the presence of the specified gap ensures that the seams formed during casting in the cavities of the thread of the rim of the glass container neck do not chip, the lacquer coating of the lid is destroyed by glass fragments, and glass fragments can possibly get into the product placed in this container. This eliminates harm to the consumer and ensures product safety.

Since the inner side wall of the lid touches only the tops of the protrusions of the rim of the neck of the glass container, the area of contact between the inner side wall of the lid and the rim of the glass container decreases, and the moment of force of screwing the lid onto the glass container depends only on the diameter of the thread protrusions of the rim of the glass container. The spread field of the twisting force moments is significantly narrowed, while it is possible to fine-tune the increase in the torque torque of the caps on the capping heads of the filling line during the capping process. When this occurs, the transfer of axial forces in the screw engagement on the upper part of the first thread profile of the inner side wall. The protrusions of the first thread profile of the inner side wall are deformed under the action of an increase in the torque forces and are pressed against the rim troughs (the first thread profile of the inner side wall of the cap is gradually transformed into the second profile of this thread). As a result, the force of friction of the cap on the neck of the bottle increases significantly and the cap stops. Moreover, with fine adjustment of the torque forces on the capping heads of the bottling line, there is no critical deformation of the cap, which violates its functionality and appearance, and the possibility of fixing the cap relative to the neck of the glass container until the moment of complete capping is excluded. This, in turn, ensures the achievement of the stability of the capping process, carried out by screwing caps on glass containers using capping heads of automatic high-performance filling lines for liquid products, which significantly increases the reliability and tightness of capping glass containers.

Thus, the design of the proposed caps makes it possible to use these caps for sealing glass containers, for example, glass bottles with water, juice, vodka and similar liquids, with the exception of the possibility of violating the integrity of the caps and the possibility of uncontrolled destruction of their thread and shape, which ensures the achievement of process stability. capping, carried out by screwing caps on glass containers using capping heads of automatic high-performance lines for filling liquid products into containers, which significantly increases the reliability and tightness of capping glass containers while maintaining their functionality and appearance and eliminating the possibility of fixing the lid relative to the neck of the glass container until it is completely capping.

It is expedient that the thread of the inner side wall of the lid be made of a material that is softer than the material of the thread of the rim of the neck of the container.

This makes it possible to change the first thread profile of the inner side wall of the lid within a given gap in the process of capping the container and forming the second profile of this thread using the thread of the finish of the neck of the glass container under the action of the torque applied to the lid in the process of capping the glass container. When this occurs, the protrusions of the threads of the inner side wall of the lid, which has a second profile, are pressed against the thread cavities of the rim of the glass container without destroying these threads. As a result, friction forces are formed that prevent the lid from rotating relative to the neck of the container in excess of what is necessary. Under the action of these friction forces, the rotation of the lid stops. The ability to fine-tune the torque torque on the capping heads of automatic high-performance filling lines for liquid products ensures that the cap is not fixed relative to the neck of the container until the moment of complete capping and prevents critical deformation of the cap, violating its functionality and appearance. This ensures the achievement of the stability of the capping process, carried out by screwing caps on glass containers using capping heads of automatic high-performance filling lines for liquid products, which significantly increases the reliability and tightness of capping glass containers.

It is desirable that the container is a glass bottle, and the cap is made of metal from an alloy containing aluminum.

This eliminates the destruction of the threads of the rim of the neck of the glass container and the threads of the inner side wall of the cap, which makes it possible to use these caps for sealing glass bottles and ensures the achievement of stability in the capping process carried out by screwing caps on glass containers using capping heads of automatic filling lines for liquid products, which significantly increases the reliability and tightness of sealing glass containers while maintaining their functionality and appearance and eliminating the possibility of fixing the lid relative to the neck of the glass container until the moment of complete sealing.

It is preferable that the diameter of the tops of the first thread profile of the inner side wall of the lid is greater than the diameter of the bottom of the bottom of the thread profile of the container finish, while the diameter of the bottom of the bottoms of the first thread profile of the inner side wall of the lid is essentially equal to the diameter of the tops of the thread profile of the container finish.

This ensures that there is no damage in the screw engagement of the thread of the inner side wall of the lid and the thread of the rim of the glass container during the corking process, which eliminates the possibility of critical deformation of the lid, violating its functionality and appearance and fixing the lid relative to the neck of the glass container until the moment of complete corking. This, in turn, ensures the achievement of the stability of the capping process, carried out by screwing caps on glass containers using capping heads of automatic high-performance lines for filling liquid products into containers, which significantly increases the reliability and tightness of capping glass containers while maintaining their functionality and appearance and eliminating the possibility of fixing the lid relative to the neck of the glass container until the moment of complete corking.

Advantageously, the protrusions of the first thread profile of the inner side wall of the lid have a height less than the depth of the cavity of the thread profile of the rim of the container.

This makes it possible to create a predetermined gap in screw engagement between the opposite surfaces of the tops of the protrusions of the thread of the inner side wall of the lid and the tops of the thread troughs of the rim of the container. As a result, there is no destruction of the threads of the inner side wall of the lid and the threads of the rim of the glass container in the screw engagement during the sealing process. At the same time, there is no critical deformation of the lid, which violates its functionality, destroys its appearance and fixes the lid relative to the neck of the container until the moment of complete corking. This ensures the achievement of the stability of the capping process, carried out by screwing caps on glass containers using capping heads of automatic high-performance lines for filling liquid products into containers, which significantly increases the reliability and tightness of capping glass containers.

Advantageously, the radius of the troughs of the first thread profile of the inner sidewall of the closure is substantially equal to the radius of the tops of the thread profile of the container finish.

This ensures the creation of a specified gap in screw engagement only between the opposite surfaces of the tops of the thread protrusions of the inner side wall of the lid and the bottom of the thread troughs of the rim of the glass container, while there is no gap between the troughs of the first thread profile of the inner side wall of the lid and the tops of the protrusions of the thread profile of the rim of the container. This allows the protrusions of the thread of the inner side wall of the lid, having a first profile that is different from the thread profile of the rim of the container, to be deformed in the process of sealing the container within a given gap with the formation of a second profile of the protrusions of this thread, the diameter of the protrusions of which is commensurate with (essentially equal to) the diameter of the bottom cavities of the thread profile of the rim of the container.

This ensures that there is no damage in the screw engagement of the threads of the inner side wall of the lid and the threads of the rim of the container during the sealing of the glass container. At the same time, there is no critical deformation of the lid that violates its functionality, destroys its appearance and fixes the lid relative to the neck of the glass container until the moment of complete corking, which ensures the achievement of the stability of the corking process carried out by screwing the lids onto glass containers using the capping heads of automatic high-performance liquid bottling lines. products in the container, which significantly increases the reliability and tightness of the sealing of glass containers.

It is possible for the formed protrusions of the second thread profile of the inner side wall of the lid to have a height substantially equal to the depth of the root thread profile of the container finish.

This allows the thread of the inner side wall of the cap, having a first profile that is different from the thread profile of the rim of the container, to be deformed in the process of capping the container within a given gap with the formation of the second profile of this thread, the diameter of the protrusions of which is commensurate with (essentially equal to) the diameter of the bottom of the profile troughs. container rim threads.

This ensures the absence of damage in the screw engagement of the thread of the inner side wall of the lid and the thread of the rim in the process of capping the glass container, ensures the achievement of the stability of the capping process carried out by screwing the lids onto glass containers using the capping heads of automatic high-performance lines for filling liquid products into containers, which significantly increases reliability and tightness of sealing glass containers while maintaining their functionality and appearance and eliminating the possibility of fixing the lid relative to the neck of the glass container until the moment of complete sealing.

Structurally, it is justified that the formed protrusions of the second thread profile of the inner side wall of the lid have a surface pressed against the opposite surface of the thread troughs of the container rim.

This ensures the creation of friction forces that prevent the rotation of the lid relative to the neck of the glass container when the lid is screwed with an increased twisting torque. Under the action of these frictional forces, the rotation of the cover is stopped, which, in turn, prevents critical deformation of the cover, impairing the functionality or appearance of the latter. In this case, there is no fixation of the lid relative to the neck of the container until the moment of complete corking. This ensures the achievement of the stability of the capping process, carried out by screwing caps on glass containers using capping heads of automatic high-performance lines for filling liquid products into containers, which significantly increases the reliability and tightness of capping glass containers.

Advantageously, the inner side wall of the lid has a free top edge folded towards the outer side wall of the lid and located in a transverse gap formed between the inner and outer side walls. In this case, it is preferable that the bend is a stiffening rib made in the form of a flange selected from the group: washer, torus, half torus, ring.

This provides additional rigidity to the thread of the inner side wall of the cover, since it excludes the possibility of deformation of the latter by creating a stiffening rib made in the form of a flange. In addition, by increasing the tightening torque of the cap on the neck of the container, which is required when sealing glass containers, the inner side wall remains stable, which eliminates the possibility of deformation of the outer side wall. As a result, high-quality helical engagement of the protrusions and cavities of the thread of the inner side wall of the lid with the protrusions and cavities of the thread of the rim of the glass container, which ensures the achievement of the stability of the corking process carried out by screwing the lids onto glass containers using the capping heads of automatic high-performance lines for filling liquid products into containers, which significantly increases the reliability and tightness of sealing glass containers while maintaining their functionality and appearance and eliminating the possibility of fixing the lid relative to the neck of the glass container until the moment of complete sealing.

It is expedient that the inner side wall of the lid is integral with the outer side wall and is an inwardly bent continuation of the outer side wall, while the inner side wall of the lid has a rounded lower edge, which is a lower threaded protrusion of the inner side wall of the lid, located in the lower the hollow of the thread of the rim of the container.

This ensures that the diameter of the lower edge of the inner side wall and the diameter of the tops of the thread projections of the inner side wall are substantially equal. This, in turn, makes it possible to center the upper smooth part of the neck of the glass container and the inner diameter of the thread of the inner side wall of the lid, which ensures high-quality helical engagement of the protrusions and cavities of the thread of the inner side wall of the lid with the protrusions and cavities of the thread of the rim of the glass container. This, in turn, ensures the achievement of the stability of the capping process, carried out by screwing caps on glass containers using capping heads of automatic high-performance lines for filling liquid products into containers, which significantly increases the reliability and tightness of capping glass containers while maintaining their functionality and appearance.

It is desirable that on the rounded lower edge of the inner side wall of the lid, a guide chamfer is made, with its tapered end facing the container neck.

This ensures reliable centering of the neck of the container and the lid during the capping process, ensuring their necessary coaxiality, which ensures the achievement of the stability of the capping process, carried out by screwing caps on glass containers using capping heads of automatic high-performance lines for filling liquid products into containers, which significantly increases reliability and tightness. sealing glass containers while maintaining their functionality and appearance and eliminating the possibility of fixing the lid relative to the neck of the container until the moment of complete sealing.

Advantageously, the outer side wall of the lid is cylindrical and has a smooth outer surface.

This ensures that there are no additional radial loads on the inner side wall, and also allows decorative coatings or extrusion on the outer surface of the outer side wall.

Thus, the design of the proposed threaded cap makes it possible to use the proposed caps for sealing glass containers, for example, glass bottles with water, juice, vodka and similar liquids, with the exception of the possibility of violating the integrity of the caps and the possibility of uncontrolled destruction of their thread and shape, which ensures stability capping process, carried out by screwing caps onto glass containers using capping heads of automatic high-performance lines for filling liquid products into containers, which significantly increases the reliability and tightness of capping glass containers while maintaining their functionality and appearance and eliminating the possibility of fixing the lid relative to the neck of the glass container until complete sealing.

For a better understanding of the invention, specific examples of its implementation are given below with reference to the accompanying drawings, in which:

fig. 1 schematically shows a screw cap made according to the invention, before corking a glass bottle, which is shown under the proposed cap, longitudinal section;

fig. 2 - threaded cap, made according to the invention, at the initial stage of screwing the cap onto a glass bottle, longitudinal section;

fig. 3 - threaded cap, made according to the invention, after screwing the cap on a glass bottle, longitudinal section.

The proposed screw cap 1 (Fig. 1, 2, 3) is mainly intended for sealing a glass container, for example, a glass bottle 2, having a neck 3, on the outer surface of the rim 4 of which a thread 5 is made, containing protrusions 6 and depressions 7 with using capping heads of automatic high-performance lines for filling liquid products into containers. While the proposed cover 1 can be used to seal other glass containers, for example, canisters of various shapes (not shown), as well as for sealing plastic and metal containers (not shown).

The proposed cover 1 has a body 8 adapted to be placed outside the neck 3 of the bottle 2. The body 8 has an end wall 9, on the inner surface of which a sealing gasket 10 is placed, and a side wall containing an outer side wall 11, inside which is coaxially and with a transverse gap H an inner side wall 12 is placed. On the surface of the inner side wall 12 of the lid 1 facing the rim 4, a thread 13 is made, containing protrusions 14 ₁ , 14 ₂ and depressions 15 adapted to form a screw engagement with the projections 6 and depressions 7 of the thread 5 of the rim 4 of the bottle 2. The outer side wall 11 of the cover 1, as a rule, has a cylindrical shape and is associated, for example, along the radius with the end wall 9 of the cover 1. In this case, the outer surface of the outer side wall 11 can be made smooth or have decorative coatings or extrusion (in the drawing not shown). Moreover, the outer side wall 11 may have a conical or other shape (not shown).

The sealing gasket 10 is made, for example, of foamed polyethylene or any other known material with similar properties approved for use in the food industry.

The thread 13 of the inner side wall 12 is made with the possibility of changing the profile under the action of the moment of twisting force in the process of capping the bottle 2 with the cap 1 using capping heads of automatic high-performance filling lines for liquid products.

Prior to the application of the torque force when sealing the glass bottle 2, the thread 13 of the inner side wall 12 of the cap 1 has a first profile that is different from the profile of the thread 5 of the finish 4 of the bottle 2. In this case, the first profile has the amount of blunting of the tops of the protrusions 14 ₁ of the thread 13 of the inner side wall 12, more than the amount of blunting of the bottom of the troughs 7 of the thread profile 5 of the finish 4 of the bottle 2. That is, the first thread profile 13 of the inner side wall 12 has a diameter of the tops of the protrusions 14 ₁ greater than the diameter of the bottom of the troughs 7 of the thread profile 5 of the finish 4 of the bottle 2. As a result, at the initial stage sealing a glass bottle 2 in screw engagement between the opposite surfaces of the tops of the protrusions 14 ₁ of the first thread profile 13 of the inner side wall 12 of the lid 1 and the bottom of the recesses 7 of the thread 5 of the rim 4 of the bottle 2, a gap C is formed, which is greater than the tolerance for a possible deviation in the dimensions (diameters) of the glass bottle 2 from the nominal value.

The protrusions 14 ₁ of the thread 13 of the inner side wall 12 of the lid 1, having the first profile, are made with the possibility of gradual deformation of the first profile within the specified gap C with the help of the thread 5 of the rim 4 of the neck 3 of the bottle 2 in the process of capping and adapted to form the second profile of this thread 13 under the action of the torque applied to the cap 1 in the process of capping the glass bottle 2. The torque depends on the specific design and material design of the cap 1 and bottle 2. For example, for an aluminum cap 1 with a diameter of 28 to 32 mm screwed onto a glass bottle 2, this torque is between 2 and 4 Nm. As a result, there is a gradual decrease in the blunting of the tops of the protrusions 14 ₁ of the first thread profile 13 of the inner side wall 12 and a gradual decrease in the gap C between the opposite surfaces of the tops of the protrusions 14 ₁ of the thread 13 of the inner side wall 12 of the lid 1 and the bottom of the depressions 7 of the thread 5 of the rim 4 of the bottle 2. In this case, the second profile of this thread 13 is formed, the value of the blunting of the tops of the protrusions 14 ₂ of which is commensurate with the value of the blunting of the bottom of the depressions 7 of the thread 5 of the rim 4 of the bottle 2. That is, the diameter d ₅ of the tops of the protrusions 14 ₂ of the second thread profile 13 of the inner side wall 12 becomes commensurate with the diameter d ₂ cavity bottoms 7 thread profiles 5 rims 4 bottles 2.

The specified design of the screw engagement and the presence of the specified gap C between the opposite surfaces of the tops of the protrusions 14 ₁ of the thread 13 of the inner side wall 12 of the cap 1 and the bottom of the recesses 7 of the thread 5 of the rim 4 of the bottle 2 allows the thread 13 of the inner side wall 12 to be changed in the process of capping the glass bottle 2 within the specified gap C, deform the first profile during the sealing of the bottle 2 and form the second profile of this thread 13, the protrusions 14 ₂ of which are commensurate with the troughs 7 of the thread profile 5 of the rim 4 of the container 2, that is, they have a diameter essentially similar to the diameter of the troughs 7 of the profile thread 5 of the rim 4 of the container 2. At the same time, the presence of the specified gap C makes it possible to use the minimum sufficient torque of the lid 1, which eliminates the possibility of critical deformation of the lid 1. In addition, the presence of a given gap C and, accordingly, the minimum sufficient torque of the twist force eliminates the possibility loss of mouth cap 1 and deformation of the inner side wall 12, for example, inward, thus acquiring a barrel-shaped shape, or outward, acquiring a globoid shape, with an increase in the torque of the cap 1 on the neck 3 in the process of capping the glass bottle 2. Moreover, there is no critical deformation lid 1, violating its functionality, destroying its appearance and fixing the lid 1 relative to the neck 3 of the container 2 until the moment of complete corking. This ensures the achievement of the stability of the capping process, carried out by screwing caps on glass containers using capping heads of automatic high-performance lines for filling liquid products into containers, which significantly increases the reliability of capping glass containers while maintaining their functionality and appearance and eliminating the possibility of fixing the cap relative to the neck of the container up to the moment of complete sealing.

For a better understanding, here are the main elements of the thread, which include (extxe.com - Modern production technologies in industry):

- thread profile - the contour of the section of the coil in the plane passing through the axis of the thread;

- the top of the thread (thread profile) - part of the helical surface connecting adjacent sides of the thread along the top of the protrusion;

- thread cavity (thread profile) - part of the helical surface connecting adjacent sides of the thread along the bottom of its cavity;

- external thread diameter - the diameter of an imaginary cylinder described around the tops of the external or troughs of the internal thread, that is, in our invention: described around the tops of the protrusions 14 of the inner side wall 12 of the cover 1;

- internal thread diameter - the diameter of an imaginary cylinder inscribed in the troughs of the external or tops of the internal thread, that is, in our invention: inscribed in the troughs 15 of the inner side wall 12 of the cover 1;

- profile height is the radially measured height of the main calculated theoretical profile;

- the tops of the protrusions and depressions of the profile are cut along a straight line or an arc of a circle.

At the initial stage of capping the bottle 2, when the cap 1 is only previously put on the neck 3 of the bottle 2, the outer surface of the upper smooth part of the neck 3 of the bottle 2 and the inner surface (along the inner diameter) of the thread 13 of the inner side wall 12 of the cap 1 are centered to form between the indicated surfaces with minimum transverse play. This significantly reduces the possibility of transverse displacement of the cap 1 relative to the longitudinal axis a-a of the neck 3 of the bottle 2 (the presence of coaxiality of the cap 1 and bottle 2). As a result, there is no possibility that, for example, the thread 13 of the inner side wall 12 of the cap 1 can abut against the end surface of the upper smooth part of the neck 3 of the bottle 2 or the inner side wall 12 of the cap 1 can abut the thread 5 of the finish 4 of the neck 3 of the bottle 2. This is ensures the formation of high-quality helical engagement of protrusions 14 ₁ , 14 ₂ and cavities 15 of the thread 13 of the inner side wall 12 of the lid 1 with protrusions 6 and cavities 7 of the thread 5 of the rim 4 of the bottle 2, which ensures controlled deformation of the lid 1 within a given gap C as at the initial stage , and in the process of further corking. This, in turn, ensures the achievement of the stability of the capping process, carried out by screwing the cap 1 onto the glass bottle 2 using the capping heads of automatic high-performance lines for filling liquid products into containers, which significantly increases the reliability of capping glass containers while maintaining their functionality and appearance and eliminating the possibility of fixing the cap 1 relative to the neck 3 of the bottle 2 until the moment of complete corking.

In addition, the specified design of the screw engagement of the thread 13 of the inner side wall 12 of the cap 1 and the thread 5 of the rim 4 of the neck 3 of the glass bottle 2 when an increased torque of the cap 1 is applied to the neck 3 of the glass bottle 2 in the process of capping using capping heads of automatic high-performance lines pouring liquid products, for example, with inaccurate adjustment of the capping heads of the specified line, provides controlled deformation of the thread 13 of the inner side wall 12 of the lid 1 within a given gap C, in which the protrusions 14 ₂ of the second profile of this thread 13 are pressed against the depressions 7 of the thread 5 of the rim 4 of the glass bottles 2 without destroying the specified threads. In this case, friction forces are formed that prevent the rotation of the cap 1 relative to the neck 3 of the bottle 2. Under the action of friction forces, the rotation of the cap 1 stops, which, in turn, prevents critical deformation of the cap 1, violating its functionality and appearance. In this case, there is no fixation of the cap 1 relative to the neck 3 of the bottle 2 until the moment of complete corking. This, in turn, ensures the achievement of the stability of the capping process, carried out by screwing the cap 1 onto the glass bottle 2 using the capping heads of automatic high-performance bottling lines for liquid products, which significantly increases the reliability of capping glass containers while maintaining their functionality and appearance and eliminating the possibility of fixation caps 1 relative to the neck 3 of the bottle 2 until the moment of complete corking.

When using a cap 1 made of a fairly rigid material, for example, tin, when screwing the cap 1 onto the neck 3 of a glass bottle 2, the presence of a given gap C ensures that the thread 5 of the rim 4 of the neck 3 of the bottle 2 does not chip off, and the paintwork of the cap 1 made of tin is not destroyed by fragments glass and the possible ingress of glass fragments into the product placed in bottle 2. This eliminates harm to the consumer and ensures product safety.

In this case, the inner side wall 12 of the lid 1 touches only the tops of the protrusions 6 of the rim 4 of the neck 3 of the bottle 2, as a result of which the contact area of the inner wall 12 and the rim 4 decreases and the torque of the cap 1 on the bottle 2 is slightly dependent on the diameter of the recesses 7 of the rim 4 of the bottle 2. The field of tolerance for the moments of the forces of twisting the caps is significantly narrowed, while it is possible to fine-tune the capping heads of the bottling line according to the torques of the caps 1. axial forces in screw engagement on the upper part of the thread profile 13 of the inner side wall 12. In this case, the thread 13 of the inner side wall 12 is deformed within the gap C and pressed against the recesses 7 of the rim 4, as a result of which the moment of friction of the cap 1 against the rim 4 of the bottle increases significantly 2 and cover 1 stops. This increases the stability of the capping process carried out by screwing cap 1 onto glass bottle 2 using capping heads of automatic high-performance lines for filling liquid products into containers, which significantly increases the reliability and tightness of capping glass containers while maintaining their functionality and appearance and eliminating the possibility of fixing cap 1 relative to the neck 3 of the bottle 2 until the moment of complete corking.

In addition, the presence of the specified gap C reduces the contact patch of the inner side wall 12 with the rim 4 of the bottle 2. The specified gap C and the presence of a gasket 10, made, for example, of foamed polyethylene, create a barrier to the heat flow from the neck 3 of the bottle 2 to the outer side wall 12 cover 1 and vice versa. The surface of the cap 1 is thermally isolated from the rim 4 of the bottle 2, which expands the possibilities of using the sealed bottle 2, for example, it is possible to transfer a hot bottle by the cap 1 with an unprotected hand, and also improves the thermal insulation of hot or cold drinks during storage.

Thus, the design of the proposed lids 1 makes it possible to use these lids for sealing glass containers, for example, glass bottles 2 with water, juice, vodka and similar liquids using capping heads of automatic high-performance lines for filling liquid products into containers without critical deformation of the lids, violating their functionality and appearance, and without fixing the lids relative to the necks of the containers until the moment of complete corking. This, in turn, increases the stability of the capping process, carried out by screwing caps on glass containers using capping heads of automatic high-performance lines for filling liquid products into containers, which significantly increases the reliability and tightness of capping glass containers.

The thread 13 of the inner side wall 12 of the cap 1 is made of a material that is softer than the thread material of the rim of the neck 3 of the bottle 2. This ensures that the first thread profile 13 of the inner side wall 12 of the lid 1 is deformed using the thread 5 of the rim 4 of the neck 3 of the glass bottle 2 within a given gap C, and the formation of the second profile of this thread 13 under the action of the moment of twisting force applied to the cap 1 in the process of corking the glass bottle 2. In this case, the protrusions 14 ₂ of the second thread profile 13 of the inner side wall 12 of the cap 1 are pressed against the depressions 7 of the thread 5 of the corolla 4 containers 1 without destroying said threads 13, 5. As a result, friction forces are formed that prevent the rotation of the cap 1 relative to the neck 3 of the bottle 2 in excess of the necessary. Under the action of these friction forces, the rotation of the cover 1 stops, which, in turn, prevents the critical deformation of the cover 1, which violates its functionality and appearance. In this case, there is no fixation of the cap 1 relative to the neck 3 of the bottle 2 until the moment of complete corking. This, in turn, ensures the achievement of the stability of the capping process, carried out by screwing the cap 1 onto the glass bottle 2 using the capping heads of automatic high-performance filling lines for liquid products, which significantly increases the reliability and tightness of the capping of glass containers.

In the example described above, the bottle 2 is a glass bottle 2, and the cap 1 is made of a material containing aluminum approved for use in the food industry. For example, cover 1 is made of EN AW-8011A alloy.

The diameter d ₁ of the tops of the protrusions 14 ₁ of the first thread profile 13 of the inner side wall 12 of the lid 1 is greater than the diameter d ₂ of the bottom of the troughs 7 of the thread profile 5 of the rim 4 of the bottle 2, while the diameter d ₃ of the bottom of the troughs 15 of the first thread profile 13 of the inner side wall 12 of the lid 1 , is essentially equal to the diameter d ₄ of the tops of the protrusions 6 of the thread profile 5 of the rim 4 of the bottle 2.

This ensures that at the initial stage of capping the bottle 2, when the cap 1 is only previously put on the neck 3, the centering of the upper smooth part of the neck 3 of the bottle 2 and the tops of the protrusions of the thread 13 of the inner side wall 12 of the cap 1, having a diameter d ₁ . As a result, between the outer surface of the upper smooth part of the neck 3 and the surface of the tops of the thread projections 13 of the inner side wall 12 of the lid 1, having a diameter d ₁ , a minimum transverse play is formed, which significantly reduces the possibility of lateral displacement of the lid 1 relative to the longitudinal axis a-a of the neck 3 bottle 2 (presence of coaxiality of cap 1 and bottle 2). As a result, there is no possibility that, for example, the thread 13 of the inner side wall 12 of the cap 1 can abut against the end surface of the upper smooth part of the neck 3 of the bottle or the inner side wall 12 of the cap 1 can abut against the thread 5 of the neck 3 of the bottle 2. This ensures the formation high-quality screw engagement of protrusions 14 ₁ and depressions 15 of the thread 13 of the inner side wall 12 of the cover of the first profile 1 with the corresponding protrusions 6 and depressions 7 of the thread 5 of the rim 4 of the bottle 2 and the formation of a guaranteed gap C between them, which leads to a controlled deformation of the cover 1 within the specified gap C both at the initial stage and during further capping of bottle 2. This, in turn, ensures the stability of reliable capping (tightness) of glass bottle 2 using capping heads of automatic high-performance lines for filling liquid products into containers without critical deformation of the cap 1 shape , n disturbing its functionality and appearance and excludes the possibility of fixing the cap 1 relative to the neck 3 of the bottle 2 until the moment of complete corking. This, in turn, ensures the achievement of the stability of the capping process, carried out by screwing the cap 1 onto the glass bottle 2 using the capping heads of automatic high-performance lines for filling liquid products into containers, which significantly increases the reliability and tightness of the capping of glass containers.

To ensure the creation of the specified gap C, the protrusions 14 ₁ of the first thread profile 13 of the inner side wall 12 of the lid 1 have a height h ₁ less than the depth h ₁ of the depressions 7 of the thread profile 5 of the rim 4 of the bottle 2.

In this case, the radius R of the depressions 15 of the first thread profile 13 of the inner side wall 12 of the cap 1 is essentially equal to the radius r of the tops of the protrusions 6 of the thread profile 5 of the finish 4 of the bottle 2.

This ensures the creation of a given gap C in screw engagement only between the opposite surfaces of the tops of the protrusions 14 ₁ of the thread 13 of the inner side wall 12 of the lid 1 and the bottom of the depressions 7 of the thread 5 of the rim 4 of the glass bottle 2, while between the depressions 15 of the first thread profile 13 of the inner side wall 12 caps 1 and the tops of the protrusions 6 of the thread profile 5 of the rim 4 of the bottle 2 there is no gap. This allows the protrusions 14 ₁ of the thread 13 of the inner side wall 12 of the cap 1, having a first profile different from the profile of the thread 5 of the finish 4 of the bottle 2, to be deformed during the sealing process within a given gap C and form a second profile of the protrusions 142 of this thread 13. This provides the absence of damage in the screw engagement of the thread 13 of the inner side wall 12 of the cap 1 and the thread 5 of the rim 4 of the glass bottle 2 during the corking process. At the same time, there is no critical deformation of the cap 1, which violates its functionality, destroys its appearance and fixes the cap 1 relative to the neck 3 of the glass bottle 2 until the moment of complete corking, which ensures the achievement of the stability of the capping process, carried out by screwing caps 1 onto glass bottles 2 using capping heads of automatic high-performance lines for filling liquid products into containers, which significantly increases the reliability and tightness of sealing glass containers.

The protrusions 14 ₂ of the second thread profile 13 of the inner side wall 12 of the lid 1 formed during the sealing of the bottle 2 have a height substantially equal to the depth of the profile of the depressions 7 of the thread 5 of the finish 4 of the bottle 2.

This allows the thread 13 of the inner side wall 12 of the cap 1, which has a first profile different from the thread profile 5 of the finish 4 of the bottle 2, to be deformed during the sealing process within a given gap C and form the second profile of this thread 13. This ensures that the screw engagement is not damaged. threads 13 of the inner side wall 12 of the cap 1 and threads 5 of the rim 4 in the process of capping a glass bottle 2 and ensures the achievement of the stability of the capping process carried out by screwing the caps 1 onto glass containers using the capping heads of automatic high-performance filling lines for liquid products, which significantly increases the reliability and tightness of sealing glass containers while maintaining their functionality and appearance and excluding the possibility of fixing the lid 1 relative to the neck 3 of the glass container until the moment of complete sealing.

The protrusions 14 ₂ of the second thread profile 13 of the inner side wall 12 of the lid 1 formed in the process of capping the bottle 2 have a surface 16 pressed against the opposite surface 17 of the depressions 7 of the thread 5 of the finish 3 of the bottle 2, while the diameter d ₅ of the tops of the protrusions 14 ₂ of the second thread profile 13 the inner side wall 12 is commensurate with (essentially equal to) the diameter d ₂ of the bottom of the depressions 7 of the thread profile 5 of the rim 4 of the bottle 2.

This ensures the creation of friction forces that prevent the rotation of the cap 1 relative to the neck 3 of the glass bottle 2 when screwing the cap 1 with an increased torque. Under the action of these frictional forces, the rotation of the lid 1 is stopped, which in turn prevents the lid 1 from being critically deformed, impairing the functionality or appearance of the latter. In this case, there is no fixation of the cap 1 relative to the neck 3 of the bottle 2 until the moment of complete corking. This ensures the achievement of the stability of the capping process, carried out by screwing caps on glass containers using capping heads of automatic high-performance filling lines for liquid products, which significantly increases the reliability and tightness of capping glass containers.

This provides a controlled deformation of the threads 13 of the inner side wall 12 of the lid 1 within the specified gap C when the lid 1 is screwed onto the neck 3 of the bottle 2 with an increased torque (for example, when the capping head of the bottling line is inaccurately adjusted), as a result of which the inner surface of the thread 13 of the inner side wall 12 of the cap 1 is pressed against the inner surface of the thread 5 of the neck 3 of the bottle 2 without destroying the said threads 5, 13. This creates friction forces that prevent the rotation of the cap 1 relative to the neck 3 of the bottle 2. Under the influence of these friction forces, the rotation of the cap 1 stops , which in turn prevents critical deformation of the lid 1, which violates the functionality or appearance of the latter, and excludes the possibility of fixing the lid 1 relative to the neck 3 of the bottle 2 until the moment of complete corking. This increases the stability of the capping process carried out by screwing caps on glass containers using capping heads of automatic high-performance lines for filling liquid products into containers, which significantly increases the reliability and tightness of capping glass containers.

The inner side wall 12 of the lid 1 contains a free top edge 18 having a bend 19 towards the outer side wall 11 of the lid 1 and placed in the transverse gap H formed between the outer and inner side walls 11, 12.

The presence of a bend 19, made, for example, in the form of a washer, a torus (half of a torus) or a ring, increases the rigidity of the upper edge 18 of the inner side wall 12 and makes it possible to perceive large axial loads from the thread 5 of the rim 4 of the neck 3 of the bottle 2. This provides additional rigidity thread 13 of the inner side wall 12 of the cover 1, as it excludes the possibility of deformation of the latter by creating a stiffening rib made in the form of a flange. In addition, with an increase in the moment of tightening the cap 1 on the neck 3 of the bottle 2, which is required when sealing glass containers, the inner side wall 12 remains stable, which eliminates the possibility of deformation of the outer side wall 11. As a result, a high-quality helical engagement of the projections 14 ₂ and depressions 15 is formed. thread 13 of the inner side wall 12, having a second profile, with protrusions 6 and depressions 7 of the thread 5 of the rim 4 of the glass bottle 2, which ensures the achievement of the stability of the capping process carried out by screwing caps 1 onto glass bottles 2 using capping heads of automatic high-performance liquid bottling lines products, which significantly increases the reliability and tightness of the sealing of glass bottles 2 while maintaining their functionality and appearance and eliminating the possibility of fixing caps 1 relative to the necks 3 of glass bottles 2 until the moment of complete sealing.

The inner side wall 12 of the lid 1 is made in one piece with the outer side wall 11 and is a continuation of the outer side wall 11 bent inward, while the inner side wall 12 of the lid 1 has a rounded lower edge 20, which is the lower protrusion 21 of the thread 13 of the inner side wall 12 cap 1, located in the lower cavity of the thread 5 of the rim 4 of the bottle 2.

The absence of a smooth part of the lower edge 20 of the inner side wall 12 of the lid 1 ensures reliable centering of the neck 3 of the bottle 2 and the lid 1 during the sealing process, ensuring their necessary alignment. In addition, this ensures that the diameter of the rounded lower edge 20 of the inner side wall 12 and the diameter of the tops of the projections 21 of the threads 13 of the inner side wall 12 are essentially equal. This, in turn, makes it possible to center the upper smooth part of the neck 3 of the glass bottle 2 and the inner the diameter of the thread 13 of the inner side wall 12 of the lid 1, which ensures high-quality screw engagement of the protrusions 14 ₂ and depressions 15 of the thread of the inner side wall 12, which has a second profile, with the protrusions 6 and depressions 7 of the thread 5 of the rim 4 of the glass bottle 2. This, in turn, , ensures the achievement of the stability of the capping process, carried out by screwing caps 1 onto glass containers using capping heads of automatic high-performance filling lines for liquid products, which significantly increases the reliability and tightness of capping glass containers while maintaining their functionality and appearance.

On the lower protrusion 21 of the rounded lower edge 20 of the inner side wall 12 of the cap 1, a guide chamfer 22 is made, with its tapered end facing the neck 3 of the bottle 2.

This provides a more reliable centering of the neck 3 of the bottle 2 and the cap 1 during the capping process, ensuring their necessary alignment, which increases the stability of the capping process carried out by screwing caps 1 onto glass bottles 2 using the capping heads of automatic high-performance filling lines for liquid products, which significantly increases reliability of sealing glass containers with the preservation of their functionality and appearance and the exclusion of the possibility of fixing the cap 1 relative to the neck 3 of the bottle 2 until the moment of complete capping.

Thus, the design of the proposed cap 1 threaded makes it possible to use the proposed caps 1 for sealing glass containers, for example, glass bottles 2 with water, juices, vodka and similar liquids, with the exception of the possibility of violating the integrity of the caps 1 and the possibility of uncontrolled destruction of their threads 13 and shape , which ensures the achievement of the stability of the capping process, carried out by screwing caps 1 onto glass containers using capping heads of automatic high-performance filling lines for liquid products, which significantly increases the reliability and tightness of capping glass containers while maintaining their functionality and appearance and eliminating the possibility of fixing the lid relative to the neck glass container until completely sealed.

The main technological transitions in the manufacture of the proposed screw cap include the following production stages:

- cover a metal sheet (alloy, for example, EN AW-8011A) with varnishes on the sheet varnishing line;

- cut down and form in the stamp blank cover 1 from the specified sheet of metal;

- carry out the rolling of the free upper edge 18 of the outer side wall 11 of the blank cover 1;

- the free lower edge 20 of the outer side wall 11 of the blank of the lid 1 is folded inward, and inside this wall 11 a tubular inner side wall 12 of the lid 1 is formed using a special stamp;

- using a forming tool, mainly a roller (rollers), a spiral thread 13 of the inner side wall 12 of the lid 1 is knurled, having a first profile, the diameter d ₁ of the tops of the protrusions 14 ₁ of which is greater than the diameter d ₂ of the bottom of the depressions 7 of the thread profile 5 of the rim 4 of the bottle 2 ;

- perform the first profile of the spiral thread 13 with the formation of a gap C in the screw engagement between the opposite surfaces of the tops of the protrusions 14 ₁ of the thread 13 of the inner side wall 12 of the lid 1, having the first profile, and the bottom of the depressions 7 of the thread 5 of the rim 4 of the bottle 2;

- the specified knurling of the spiral thread 13 is performed with the possibility of changing the first thread profile 13 using the thread 5 of the rim 4 of the neck 3 of the bottle 2 with an increase in the torque applied to the cap 1 in the process of capping the glass bottle 2 and the gradual formation of the second profile of this thread 13, diameter d ₅ protrusions 14 ₂ which is commensurate with the diameter d ₂ of the bottom of the depressions 7 of the thread profile 5 of the rim 4 of the bottle 2;

- on the inner surface of the end wall 9 place a sealing gasket 10, for example, made of foamed polyethylene.

The proposed cover 1 is used as follows:

- the process of capping is carried out by screwing caps 1 onto glass containers using capping heads of automatic high-performance lines for filling liquid products into containers;

- preliminarily put on the cap 1 on the neck 3 of the bottle 2 and center the upper smooth part of the neck 3 of the glass bottle 2 along the inner diameter of the thread 13 of the inner side wall 12 of the cap 1;

- carry out capping of the glass bottle 2 by applying the moment of twisting force on the cap 1 using the capping heads of automatic high-performance lines for filling liquid products into containers;

- form a gap C in helical engagement between the opposite surfaces of the tops of the protrusions 14 ₁ of the thread 13 of the inner side wall 12 of the lid 1, having the first profile, and the bottom of the depressions 7 of the thread 5 of the rim 4 of the neck 3 of the bottle 2;

- increase the moment of twisting force in the process of capping the bottle 2 and provide in the process of capping the gradual deformation of the protrusions 14 ₁ of the thread 13 of the inner side wall 12, having the first profile, using the thread 5 of the rim 4 of the neck 3 of the bottle 2 within the specified gap C;

- provide a gradual decrease in the diameter d ₁ of the tops of the protrusions 14 ₁ of the first profile of the specified thread 13 and a gradual decrease in the gap C between the opposite surfaces of the tops of the protrusions 14 ₁ of the thread 13 of the inner side wall 12 of the lid 1 and the bottom of the depressions 7 of the thread 5 of the rim 4 of the bottle 2;

- form the second thread profile 13 in the process of capping the bottle 2, which has a diameter d ₅ of the tops of the protrusions 14 ₂ commensurate with the diameter d ₂ of the bottom of the depressions 7 of the thread profile 5 of the rim 4 of the neck 3 of the container 2;

- at the end of the capping process of the container 2, the proposed lid 1 is formed with controlled deformation of the thread 13 of the inner side wall 12 of the lid 1 within a given gap C, the presence of which ensures that the protrusions 14 ₂ of the thread 13 of the inner side wall 12 of the lid 1 are pressed against the depressions 7 of the thread 5 of the rim 4 glass bottle 2 without destroying the said threads 13, 5. In this case, friction forces are formed that prevent the rotation of the cap 1 relative to the neck 3 of the bottle 2 in excess of the gasket 10 necessary to seal. Under the action of these friction forces, the rotation of the cap 1 stops, which, in turn, prevents critical deformation of the cap 1. In this case, there is no fixation of the cap 1 relative to the neck 3 of the glass bottle 2 until the moment of complete corking.

Claims (13)

1. A threaded lid, mostly metal, for sealing a container having a neck, on the outer surface of the rim of which there is a thread containing protrusions and depressions, while the threaded lid contains a body adapted to be placed outside the neck of the container and having an end wall, on the inner surface of which there is a sealing gasket, an outer side wall and an inner side wall, on the surface facing the rim, a thread is made containing protrusions and cavities adapted to form a screw engagement with the protrusions and cavities of the thread of the rim of the container, characterized in that the thread of the inner side wall of the lid has the first profile, the diameter of the tops of the protrusions of which is greater than the diameter of the bottom of the bottom of the thread profile of the rim of the container and which is adapted to form a gap in the screw engagement between the opposite surfaces of the tops of the threads of the threads of the inner side wall of the lid and the bottom of the thread troughs of the container rim, at the same time, the thread of the inner side wall is configured to deform the protrusions of the first profile within this gap in the process of capping the container and forming the second profile of this thread, the diameter of the protrusion tops of which is commensurate with the diameter of the bottom of the thread profile of the container finish. 2. Threaded lid according to claim 1, characterized in that the thread of the inner side wall of the lid is made of a material that is softer than the material of the container neck rim thread. 3. Threaded cap according to claim 2, characterized in that the container is a glass bottle, and the cap is made of metal from an alloy containing aluminum. 4. Threaded lid according to claim 1, characterized in that the diameter of the tops of the protrusions of the first thread profile of the inner side wall of the lid is greater than the diameter of the bottom of the bottom of the thread profile of the rim of the container, while the diameter of the bottom of the bottom of the troughs of the first thread profile of the inner side wall of the lid is essentially equal to the diameter the tops of the protrusions of the thread profile of the rim of the container. 5. A threaded lid according to claim 4, characterized in that the protrusions of the first thread profile of the inner side wall of the lid have a height less than the depth of the thread profile recesses of the rim of the container. 6. A threaded lid according to claim 5, characterized in that the radius of the troughs of the first thread profile of the inner side wall of the lid is essentially equal to the radius of the tops of the protrusions of the thread profile of the rim of the container. 7. A threaded lid according to claim 1, characterized in that the formed protrusions of the second thread profile of the inner side wall of the lid have a height substantially equal to the depth of the profile of the thread troughs of the rim of the container. 8. A threaded lid according to claim 7, characterized in that the formed protrusions of the second thread profile of the inner side wall of the lid have a surface pressed against the opposite surface of the thread troughs of the rim of the container. 9. Threaded lid according to claim 1, characterized in that the inner side wall of the lid contains a free upper edge, which is bent towards the outer side wall of the lid and is located in the transverse gap formed between the inner and outer side walls. 10. Threaded cap according to claim 9, characterized in that the bend is a stiffener made in the form of a flange selected from the group: washer, torus, half torus, ring. 11. A threaded lid according to claim 1, characterized in that the inner side wall of the lid is made in one piece with the outer side wall and is a continuation of the outer side wall bent inward, while the inner side wall of the lid has a rounded lower edge, which is a lower protrusion threads of the inner side wall of the lid, located in the lower cavity of the thread of the rim of the container. 12. A threaded lid according to claim 11, characterized in that a guide chamfer is made on the rounded lower edge of the inner side wall of the lid, with its tapered end facing the container neck. 13. Threaded cap according to claim 1, characterized in that the outer side wall of the cap is cylindrical and has a smooth outer surface.

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