WO2021129931A1

WO2021129931A1 - Safe cap for a container

Info

Publication number: WO2021129931A1
Application number: PCT/EP2019/086970
Authority: WO
Inventors: Olexandr KACHANOV
Original assignee: Retal Industries Limited
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2021-07-01

Abstract

The present invention relates to a cap for a container for storing, protecting and transporting the contents, particularly to a cap for receptacles (bottles, canteens, flasks and the like). The proposed cap for a container contains a main base (1) having an upper contact surface. Sealing means are located on the inner side of the cap to provide sealing with an open edge (2) of the container. The cap also includes a lateral cylindrical surface (3) that, together with the upper surface, forms a closed portion of a hollow cylinder on one side and forms its lower open portion on the other side. The main base (1) is provided with a thread along its inner lateral surface for screwing onto the mating thread (4) of the container neck, and connecting bands (5) connected to the control ring (6) mounted on the container neck below its thread (4) are attached to the lower open portion of the hollow cylinder. The connecting bands (5) are separated from the cap and the control ring (6) by two substantially equidistant dividing lines (7, 8) of contact, "connecting bands - main cap base" and "connecting bands - control ring", with their starting points (7a, 8a) located on opposite sides of the lateral cylindrical surface (3) at 170° to 190° relative to each other. The apex of the said angle between the starting points (7a, 7b) of the dividing lines (7, 8) lies on the centerline (9) of the main cap base (1) and on the surface substantially perpendicular to this line including the starting point (7a) of the first dividing line (7) and the projection onto this plane of the starting point (8a) of the second dividing line lying on the plane substantially parallel to the first plane and 0.5 to 3 mm away from it. Each of the dividing lines (7, 8) lies in its own plane, and the length of the arc of each of the dividing lines is between 315° and 350°, where the first dividing line (7) is adjacent to the open end of the main cap base (1), and the second dividing line (8) is adjacent to the control ring (6) mounted on the container neck. The technical result achieved by the present implementation is a design for a container cap which, while remaining attached to the container, is safe to use (prevents the sharp edge of the cap getting into contact with the skin on the consumer's face) and yet does not complicate the manufacturing process. Embodiments of the claimed invention are also disclosed.

Description

SAFE CAP FOR A CONTAINER

Field of Invention

The present invention relates to a cap for a container for storing, protecting and transporting the contents, particularly to a cap for receptacles (bottles, canteens, flasks and the like).

Prior Art

Usually, the cap of any container is completely detachable from the container body after opening. Such caps are therefore easy to lose. Caps are typically made of water-insoluble materials, and discarded or lost caps pollute the environment and cause the ecological situation to deteriorate. In addition, when dropped, the cap may become dirty and unsuitable for reclosing the container.

There are a number of solutions for retaining the connection between caps and containers during opening to prevent them from being lost and to eliminate the risk of environmental contamination. Nevertheless, the existing designs differ markedly in terms of their limited functionality, their usability and their safety for users. Most of the proposed cap designs where the cap is attached to the container body fix the open portion of the cap with its internal surface and sharp edge facing outwards.

US Patent No. 8,231,020 B2, published on 7/31/2012, discloses a cap which is a cylindrical hollow base with a bottom. The internal surface of the cap sidewalls is provided with a thread in the form of separate segments to be screwed onto the mating thread of the container neck.

US Patent Application No. 2011/0290755 Al, published on 12/1/2011, discloses another container cap design which comprises a cap base and a control ring attached to the container neck.

The drawback of these designs known from the prior art is the lack of structural interconnection between the cap base and the container when the cap is open, which may result in accidental loss of the cap.

US Patent Application No. 2012/0193362 Al, published on 8/2/2012, discloses a container cap comprising a cap base that houses a chamber. The cap base comprises a closed top end and an inner wall that defines the chamber, wherein the open end of the chamber is sealed with a closing member in the form of a folding part. The closed top end comprises a diaphragm and a piston extending axially from the diaphragm. The closed top end, the piston and the inner wall are configured integrally. The internal surface of the cap base sidewalls is provided with a thread in the form of separate segments to be screwed onto the mating thread of the container neck. The drawback of the known cap is that a user cannot consume the contents of the container directly from the container, since, in the open state, the folding portion of the cap is positioned with its internal surface and sharp edges facing outwards.

US Patent No. 9,643,762 B2, published on 5/9/2017, discloses a container cap. This cap comprises a main base having a top plate and a circular sidewall, wherein one periphery of the circular sidewall connects to the top plate, forming a closed end, and the other periphery of the circular sidewall at the opposite side of the closed end forms an open end. The cap also comprises a ring member located at the open end of the main base, detached from the main base by a first cutting line and connected to the main base by a plurality of connecting portions, wherein a plurality of second cutting lines are located on the main base or the ring member and located at one side of the plurality of connecting portions. The known cap, while in its open and/or closed state, remains connected to the container.

Once again, the drawback of the known cap is that a user cannot consume the contents of the container directly from the container, since, in its open state, the cap is positioned with its internal surface and sharp edges facing outwards.

The closest analogue of the container cap of the invention is the cap disclosed in US 4805792 A, published on 2/21/1989. The cap defined as the closest analogue comprises a main base having an upper contact surface and a lateral cylindrical surface, which, together with the upper surface, forms a closed portion of a hollow cylinder at one side, while the other side forms an open end. The internal portion of the lateral cylindrical surface is provided with a thread to be screwed onto the mating thread of the container neck. The cap thread can be either continuous or segmented, as well as single-start or multiple- start. A band connected to a control ring mounted on the container neck below its thread is attached to the lower open end of the cylinder. The band is separated from the cap and the control ring by two dividing lines.

Despite the fact that the cap in its open state remains attached to the container to prevent its accidental loss, the cap design is not easy to use and has the potential to cause injury. Since the cap remains attached to the control ring and can be freely rotated at the same time, the band and the cap touch the user’s face with their sharp edges when the beverage is consumed directly from the container.

Therefore, there is a need for a safe cap design that can prevent a user’s face getting into contact with the sharp edges of the cap structure in its open state when the contents of the container are consumed directly from the container. Summary of the Invention

The present invention is aimed at providing a safe container cap design that can prevent a user’s face getting into contact with the sharp edges of the cap in its open state when the contents of the container are consumed directly from the container.

In particular, unlike conventional caps, the cap of the invention is designed such that it is in the open state with respect to its container and yet remains attached to the container, i.e., when the container is opened, the cap is folded back and remains attached to the container.

In addition, if desired, the cap of the present invention can remain open and be kept away from the container neck with the user’s hand.

In another embodiment, the cap of the present invention is configured to be securely fixed below the support ring of the container neck. The cap of this embodiment will be held in place by the outer surface of the cap base bearing against the support ring of the container and by the tension of the connecting bands.

The cap of the present invention has new design features. At the same time, the changes made to the design will not interfere with its main function of opening the container. In its open state, the cap, while remaining attached to the bottle by means of the connecting bands, is moved away from the neck to prevent the sharp edge of the cap getting into contact with the skin of the face, including the user’s (consumer’s) lips, and will not damage his/her skin. This ensures the safe use of the cap of the present invention.

The cap of the present invention can be opened and, if desired, closed, thereby closing the container.

The present invention also eliminates the following drawbacks of the prior art:

- it prevents the potential accidental loss of the cap, protecting the environment;

- it provides a position of the cap relative to the container which is safe for the user;

- it prevents contamination of the cap due to contact with dirty surfaces.

The technical result achieved by the present implementation is a design for a container cap which, while remaining attached to the container, is safe to use (prevents the sharp edge of the cap getting into contact with the skin on the consumer’s face) and yet does not complicate the manufacturing process.

The safety of the proposed cap consists in its protection of the user’s face against injury from the sharp edges of the cap formed when the joints or bridges are broken when the container is opened along the breaking lines, as well as the environmental protection it provides insofar as the cap remains attached to the container and is disposed of along with it. Therefore, the cap cannot fall off on its own and does not pollute the environment.

The points of attachment of the connecting bands to the cap base and the control ring are located on the opposite sides of the neck with the cap. Owing to this design, when the container is opened by completely unscrewing the cap of the invention, the connecting bands cause the cap to position itself away from the neck with its sharp edges facing the outside surface of the container.

Also, the process of manufacturing the cap of the invention does not require new operations or the use of sophisticated equipment.

To achieve the technical objective, the container cap is made as follows. The cap comprises a main base having an upper surface with sealing means on its inner side to provide sealing with the open end of the container, and a lateral cylindrical surface which, together with the upper surface, forms a closed portion of a hollow cylinder on one side and an open portion of the hollow cylinder on the other side. A plurality of sealing means embodiments are known from the prior art which could be used to implement the present invention. The internal surface of the main cap base is provided with a thread (or thread segments) to secure the cap to the container neck to provide proper forces for the sealing thereof. Connecting bands designed to provides new features of the claimed cap are attached to the lower open end of the main cap base. One lateral surface of the connecting bands is adjacent to the open end of the main cap base, and the other lateral surface is adjacent to the control ring. The lateral surfaces of the connecting bands are detached from the edge of the main base and the control ring by joints or a thin film. The thin film is formed simultaneously with the main cap base, the connecting bands, and the control ring during the injection molding process. The joints can be formed either by molding or by cutting using a special tool: a grooved knife. The proposed cap design may use combinations of joints and thin film.

The control ring is mounted on the container neck below the thread. The projections on the internal surface of the control ring are locks that secure this ring below the support ring of the neck.

The container can be a PET container (for example, a bottle for carbonated or non- carbonated water/beverages, beer, juices, fermented milk and the like) or another container.

The main cap base can be made of high-density polyethylene (HDPE), and the connecting bands and the control ring can also be made of the same material. When the cap is made of high- density polyethylene, which is a durable and wear-resistant material, the cap remains operable even after a long period of storage.

According to one embodiment of the invention, the connecting bands are separated from the cap and from the control ring by two equidistant dividing lines of contact, “connecting bands - main cap base” and “connecting bands - control ring”, the starting points of which are located on the opposite sides of the lateral surface of the main cap base at an angle of 170° to 190° relative to each other, with the vertex of this angle at the intersection of the axial line of the cap and the plane substantially perpendicular to this line that includes the starting point of the first dividing line of the contact and the projection of the starting point of the second dividing line of the contact onto this plane, lying on a plane substantially parallel to the first plane and 0.5 to 3 mm away from it.

Each of the dividing lines lies on its own plane, each being substantially parallel to the other, and each of the dividing lines is located within a distance equal to the length of the circular arc with a central angle of 315° to 350°. The first dividing line detaches the open end of the main cap base, and the second dividing line is adjacent to the control ring mounted on the container neck. In this way, the length of the attachment of the connecting bands to the main cap base and to the control ring is defined by the starting and end points of the respective dividing lines. The connecting bands are symmetrical to each other relative to the plane that includes the centerline of the cap, the points equidistant from the beginning of these bands, and the similar points equidistant from the end of these bands. The two connecting bands are located on different sides of the neck. Starting on one side of the neck and extending to its opposite side, they form something like a ring placed between the main cap base and the control ring. If we treat the connecting bands as part of an intermediate ring, we can say that this ring, within a distance equal to the length of the arc with a central angle of 10° to 45°, is integral with the open end of the main cap base attached thereto with one lateral surface, and that on the opposite side, within a distance equal to the length of the arc with a central angle of 10° to 45°, it is integral with the upper edge of the control ring attached thereto with the opposite lateral surface. Therefore, the length of each connecting band occupies an arc with a central angle of 135° to 170° of the lateral surface of the intermediate ring.

According to another embodiment, the connecting bands are separated from the cap and the control ring by two dividing lines of equal length. The starting point of one dividing line lies on a plane covering the open edge of the main cap base and is displaced by an angle of 170° to 190° relative to the starting point of the other dividing line. The apex of the said angle between the starting points of the dividing lines is at the intersection of the centerline of the cap and the surface which is substantially perpendicular to that line, including the projection of the starting points of the first and second dividing lines onto this plane. Each dividing line begins on one plane perpendicular to the centerline and continues within it for a distance equal to the length of the circle arc with a central angle of between 90° and 150°, then moves smoothly onto the other plane parallel to the first plane and 0.5 to 3 mm away from it, and ends on this plane at a distance equal to the length of the circle arc with a central angle between 90° and 150°. Both dividing lines are completely symmetrical to each other with an axis of symmetry coinciding with the centerline of the cap, and are equidistant. Both dividing lines begin and continue in the direction of right or left rotation, but always have the same direction of rotation.

One special case for building the dividing lines can be their parallel arrangement on a cylindrical surface coinciding with the lateral surface of the cap. In this case, the dividing lines begin on the circle which is the intersection of the cylindrical surface of the construction and the surface coinciding with the open edge of the cylindrical part of the cap. They continue to the circle equidistant from the first circle and the open edge of the cap base at a distance of between 0.5 and 3 mm from the cap base. Each of the dividing lines continues for a distance equal to the length of the circular arc with a central angle ranging from 270° to 330°. The starting points of the first and second dividing lines are adjacent to the open end of the main cap base, and the ends are adjacent to the control ring put on the neck of the container; alternatively, the starting points of the first and second dividing lines are adjacent to the control ring put on the neck of the container, while the ends are adjacent to the open end of the main cap base. The apex of the said angle between the starting and end points of the dividing lines lies at the intersection of the centerline of the cap and the plane substantially perpendicular to this line, including the projections of the starting and end points of the dividing lines onto this plane.

When the cap is manufactured according to one of the embodiments, the connecting bands can initially be made integrally with the open edge of the cylindrical surface of the main cap base and the control ring. Further, the first and second dividing lines can be formed while the cap is being manufactured. The lines are made using an equipment that is customizable to the specific cap design. This equipment cuts the dividing lines with a sharp tool similar to a grooved knife. Due to the grooves on the sharp surface of the knife, thin joints/bridges are formed during the cutting process, connecting the main cap base with the connecting bands and, in turn, connecting the bands with the control ring.

The joints/bridges hold the entire structure together until the container is opened, including during transportation.

At the moment the container is opened, i.e. when the cap is turned, preferably counterclockwise, the joints/bridges break along the dividing lines and provide easy detachment of the main cap base from the control ring, forming an intermediate ring or a belt between the main cap base and the control ring, the intermediate ring or the belt comprising two connecting bands on opposite sides of the circumference of the belt. The width of the bridges or joints is selected so that, when a small force is applied, preferably counterclockwise, they are torn when the container is opened, and is preferably in the range of 0.1 to 0.9 mm.

In another embodiment, when the cap is manufactured, the dividing lines are formed by compression or injection molding. In this case, as with the use of a cutting tool, two dividing lines are formed, interrupted by thin cast joints/bridges and/or a thin film.

Joints/bridges and/or the film provide the conditions for the injection/compression formation of the control belt formed by the material between the two dividing lines simultaneously with the main cap base. They are destroyed within a given force range when the container is opened, while forming an intermediate ring or a belt attached on one side to the open edge of the main cap base, and to the control ring of the cap on the opposite side.

The cap and, in particular, its dividing lines with joints/bridges can be formed in other ways.

When the container is opened, the connecting bands formed provide the possibility of moving the detached main cap base and securely fixing it by hand away from the neck of the container, or securely fixing the cap base under the support ring beneath the thread of the container neck, while the main cap base is turned with its sharp edge toward the body of the container. This excludes the possibility of the skin of the face, in particular the user’s lips, coming into contact with the sharp edge of the cap and prevents scratches/damage to the skin.

Brief Description of the Drawings

Figs la to Id show a container with a cap where the container is closed with the cap.

Figs le to 11 show the sequence of positions of the cap when the container is opened with the cap incompletely unscrewed.

Figs lm to lq show the container with the cap open (unscrewed) according to one of the embodiments of the cap.

Figs. 2a to 2g show different views of the container with the cap open, showing the mechanism for placing the cap with its sharp edges toward the surface of the container, according to one of the embodiments of the cap.

Fig. 3 shows the flat pattern of the lateral surface of the cap at the locations of the dividing lines with joints/bridges formed with a grooved knife when making the control ring and connecting bands integrally with the cap. Also shown in Fig. 3 is the flat pattern of the lateral surface of the cap at the locations of the dividing lines with joints/bridges and a thin film formed by compression or injection molding when the control ring is made and connecting bands partially separated from the cap base.

Figs. 4a to 4d show the successive positions of the cap when the container is opened, where the cap is not completely unscrewed, according to another embodiment of the cap.

Figs. 4e to 4m show different views of the container with the cap open, showing the mechanism for placing the cap with its sharp edges toward the surface of the container, according to another embodiment of the cap.

Figs. 5a to 5c show the flat pattern of the lateral surface of the cap at the locations of the dividing lines with joints/bridges and/or a thin film formed by compression or injection molding.

The elements of the invention are further indicated as follows:

1 — main cap base;

2 — open edge (neck) of the container;

3 — lateral surface of the main cap base;

4 — thread of the container;

5 — connecting bands;

6 — control ring;

7 — first dividing line;

7a — starting point of the first dividing line;

7b — end of the first dividing line;

8 — second dividing line;

8a — starting point of the second dividing line;

8b — end of the second dividing line;

9 — centerline;

10 — joints/bridges;

11 — thin film.

Embodiments of the Invention

A cap comprises a main base (1), with a seal inside its upper part for interaction with the open edge (2) of the container, and a cylindrical lateral surface (3). As a whole, the cap has the shape of a hollow circular cylinder, one of the bases of which is the upper part of the main base and the lateral surface of which is the cylindrical lateral surface (3), and the second base of the cylinder is absent and represents the open element of the main base. The main cap base is preferably made of high-density polyethylene (HDPE). The container can be made of polyethylene terephthalate (a PET container) or other materials: metal, glass, polyethylene, etc.

The inner surface of the main cap base (1) can be covered with single-start or multiple-start threads (or thread segments). If the cap is threaded, the container neck has a mating thread (4).

Connecting bands (5) are attached to the lower open edge of the main cap base (1), having one lateral surface connected by joints/bridges to the open edge of the main cap base (1) and the other lateral surface connected by joints/bridges to a control ring (6) mountable on the neck of the container below its thread when the container is being closed. The inner surface of the control ring may be equipped with protrusions: locks securing the control ring to the neck of the container.

The control ring (6) and the connecting bands (5) may be made of the same material as the cap and the container, i.e. high-density polyethylene (HDPE), or other material different from it but with similar physical properties, e.g. polypropylene (PP).

According to one embodiment of the invention, the connecting bands (5) are separated from the cap and the control ring by two equidistant dividing lines (7, 8) of contact, “connecting bands - main cap base” and “connecting bands - control ring”. The two equidistant dividing lines (7, 8) of contact can be either the same length or different lengths. The starting points (7a, 8a) of the dividing lines (7, 8) are located on opposite sides of the lateral surface (3) of the main cap base (1) at an angle of between 170° and 190° relative to each other. The apex of the said angle is at the intersection of the longitudinal axis of the cap and the plane substantially perpendicular to this axis, including the starting point (7 a) of the first dividing line (7) of contact and the projection onto this plane of the starting point (8a) of the second dividing line (8) of contact lying on a plane substantially parallel to the first plane and 0.5 to 3 mm away from it.

Each of the dividing lines (7, 8) lies on its own plane substantially parallel to the other plane, and the arc length of each of the dividing lines (7, 8) is between 315° and 350°. The first dividing line (7) detaches the open end of the main cap base (1) and the second dividing line (8) is adjacent to the control ring (6) mounted on the container neck. In this way, the length of the attachment of the connecting bands to the main cap base (1) and to the control ring (6) is defined by the starting and end points of the respective dividing lines.

The connecting bands are symmetrical to each other relative to the plane that includes the centerline of the cap, the points equidistant from the beginning of these bands, and the similar points equidistant from the end of these bands. The two connecting bands are located on different sides of the neck. Starting on one side of the neck and extending to its opposite side, they form something like a ring placed between the main cap base and the control ring. If we treat the connecting bands as part of an intermediate ring, we can say that this ring, within a distance equal to the length of the arc with a central angle of 10° to 45°, is integral with the open end of the main cap base attached thereto with one lateral surface, and that on the opposite side, within a distance equal to the length of the arc with a central angle of 10° to 45°, it is integral with the upper edge of the control ring attached thereto with the opposite lateral surface. Thus, the length of each connecting band occupies an arc with a central angle of 135° to 170° on the lateral surface of the intermediate ring.

According to another embodiment, the connecting bands (5) are separated from the cap and the control ring (6) by two dividing lines (7, 8) of equal length. The starting point (7a) of one dividing line (7) lies on the plane covering the open edge of the main cap base (1) and is displaced by an angle of 170° to 190° from the starting point (8a) of the other dividing line (8). The apex of the said angle between the starting points of the dividing lines (7, 8) is at the intersection of the longitudinal axis of the cap and the surface which is substantially perpendicular to this axis, including the projection of the starting point (7a) of the first dividing line (7) and the projection of the starting point (8a) of the second dividing line (8) onto this plane.

Each dividing line (7, 8) begins on one plane perpendicular to the centerline and continues within it for a distance equal to the length of the circle arc with a central angle of between 90° and 150°, then moves smoothly onto the other plane parallel to the first plane and 0.5 to 3 mm away from it, and ends on this plane at a distance equal to the length of the circle arc with a central angle between 90° and 150°. Both dividing lines are completely symmetrical to each other with an axis of symmetry coinciding with the centerline of the cap, and are equidistant. Both dividing lines begin and continue in the direction of right or left rotation, but always have the same direction of rotation, as shown in Figs. 5a-5c. One special case for building the dividing lines can be their parallel arrangement on a cylindrical surface coinciding with the lateral surface of the cap. In this case, the dividing lines, when made as in this special case, begin on the circle which is the intersection of the cylindrical surface of the construction and the surface coinciding with the open edge of the cylindrical part of the cap. They continue to the circle equidistant from the first circle and the open edge of the cap base at a distance of between 0.5 and 3 mm from the cap base. Each of the dividing lines continues for a distance equal to the length of the circular arc with a central angle ranging from 270° to 330°. The starting points (7a, 8a) of the first (7) and second (8) dividing lines are adjacent to the open end of the main cap base, and the ends (7b, 8b) are adjacent to the control ring put on the neck of the container; alternatively, the starting points (7 a, 8a) of the first (7) and second (8) dividing lines are adjacent to the control ring put on the neck of the container, while the ends (7b, 8b) are adjacent to the open end of the main cap base. The apex of the said angle between the starting and end points of the dividing lines lies at the intersection of the longitudinal axis of the cap and the plane substantially perpendicular to this axis, including the projections of the starting and end points of the dividing lines onto this plane.

The proposed invention functions as follows, allowing the claimed technical result to be achieved.

Before opening, the container is generally located in one of the user's hands. To remove the cap (1), the user rotates it counterclockwise with the other hand. This movement lifts the cap (1) up, while the control ring (6) is held on the neck of the container below its thread. The rotation causes the joints/bridges (10) and/or the thin film (11) to rupture. As a result, the main cap base (1) is detached to the side of the container neck, remaining in substantially the same position relative to the neck, i.e. with its sharp edges facing down towards the body of the container. In this case, the main cap base (1) remains structurally connected to the container by means of connecting bands (5) connected to the control ring (6) remaining on the neck of the container.

The connecting bands, according to the first embodiment, provide the ability to move the detached main cap base and securely fix it by hand to the side of the container neck. In the second embodiment, the bands allow the main cap base to be securely fixed under the support ring or thread of the neck, wherein the main cap base in both embodiments has its sharp edge facing the body of the container, thereby providing the ability to consume the contents through the neck of the container without the user’s face coming into contact with the sharp edges of the cap, which prevents his/her skin from being scratched or damaged.

The described design of the cap allows the user to use only one hand while drinking directly from the container, since the user does not need to hold the detached cap in the other hand. The cap can also tightly reseal and open the container without breaking the connecting bands.

Claims

CLAIMS:

1. A cap for a container comprising a main base (1) having an upper contact surface, with sealing means on the inner side to provide sealing with an open edge (2) of the container, and a lateral cylindrical surface (3) that, together with the upper surface, forms a closed portion of a hollow cylinder on one side and forms its lower open portion on the other side, wherein the main base (1) is provided with a thread along its inner lateral surface for screwing onto the mating thread (4) of the container neck, and connecting bands (5) connected to the control ring (6) mounted on the container neck below its thread (4) are attached to the lower open portion of the hollow cylinder, characterized in that the connecting bands (5) are separated from the cap and the control ring (6) by two substantially equidistant dividing lines (7, 8) of contact, “connecting bands - main cap base” and “connecting bands - control ring”, with their starting points (7a, 8a) located on opposite sides of the lateral cylindrical surface (3) at 170° to 190° relative to each other, where the apex of the said angle between the starting points (7a, 7b) of the dividing lines (7, 8) lies on the centerline (9) of the main cap base (1) and on a surface substantially perpendicular to this line including the starting point (7a) of the first dividing line (7) and the projection onto this plane of the starting point (8a) of the second dividing line lying on a plane substantially parallel to the first plane and 0.5 to 3 mm away from it, wherein each of the dividing lines (7, 8) lies in its own plane, and the length of the arc of each of the dividing lines is between 315° and 350°, where the first dividing line (7) is adjacent to the open end of the main cap base (1), and the second dividing line (8) is adjacent to the control ring (6) mounted on the container neck.

2. A cap according to claim 1, characterized in that the dividing lines (7, 8) are made with a grooved knife to form joints/bridges (10) which rupture upon application of force at the moment the container is opened.

3. A cap according to claim 1, characterized in that the dividing lines (7, 8) are made with joints/bridges (10) and/or a thin film (11) that rupture upon application of force at the moment the container is opened, formed by molding integrally with the main cap base, the control ring and the connecting bands.

4. A cap according to any one of the preceding claims, characterized in that it is made of high-density polyethylene (HDPE) or of a material with similar mechanical properties, for example polypropylene (PP).

5. A cap for a container comprising a main base (1) having an upper contact surface, with sealing means on the inner side to provide sealing with an open edge (2) of the container, and a lateral cylindrical surface (3) that, together with the upper surface, forms a closed portion of a hollow cylinder on one side and forms its lower open portion on the other side, wherein the main base (1) is provided with a thread along its inner lateral surface for screwing onto the mating thread (4) of the container neck, and connecting bands (5) connected to the control ring (6) mounted on the container neck below its thread (4) are attached to the lower open portion of the hollow cylinder, characterized in that the connecting bands (5) are separated from the cap and the control ring (6) by two substantially equidistant dividing lines (7, 8) of contact, “connecting bands - main cap base” and “connecting bands - control ring”, with their starting points (7a, 8a) located on opposite sides of the lateral cylindrical surface (3) at 170° to 190° relative to each other, where the apex of the said angle between the starting points (7a, 8a) of the dividing lines (7, 8) lies at the intersection of the centerline of the cap (9) and a surface substantially perpendicular to this line, including a projection of the starting point (7 a) of the first dividing line (7) and a projection of the starting point (8a) of the second dividing line (8) onto this plane, and each of the dividing lines (7, 8) extends at an angle from 270° to 330°, where the starting points (7a, 8a) of the first (7) and second (8) dividing lines are adjacent to the open end of the cap base and the end points (7b, 8b) are adjacent to the control ring (6) mounted on the container neck, or the starting points (7a, 8a) of the first (7) and second (8) dividing lines are adjacent to the control ring (6) mounted on the container neck and the end points (7b, 8b) are adjacent to the open end of the cap base, wherein each point of the first dividing line (7) in its starting and end points is spaced 0.5 to 3 mm apart from the corresponding point of the second dividing line (8), starting in one plane and smoothly moving to the plane parallel to it.

6. A cap according to claim 5, characterized in that the connecting bands (5) and the control ring (6) are made by molding, while the dividing lines (7, 8) are made with a grooved knife to form joints/bridges (10) which rupture upon application of force at the moment the container is opened.

7. A cap according to claim 5, characterized in that the connecting bands (5) and the control ring (6) are made by pressure or injection molding, with simultaneous formation of the dividing lines (7, 8) with joints/bridges (10) and/or a thin film (11) which rupture upon application of force at the moment the container is opened.

8. A cap according to any one of claims 5-7, characterized in that it is made of high- density polyethylene (HDPE) or of a material with similar mechanical properties, for example polypropylene (PP).