UA75903C2 - Closure for liquid product container - Google Patents

Abstract

The invention concerns a closure for liquid product container comprising a lateral skirt (1) provided with an internal thread (10) and a lower tear band (11) and linked to an upper plate (2) bearing internally sealing means designed to co-operate with the upper edge (B) of the neck (C) of the container. The invention is characterized in that said sealing means comprise an outer shoulder (4) arranged in the linking zone between the skirt (1) and the plate (2), including a radial projection, and bearing an elastically deformable peripheral lip (3) extending, when inactive, downwards towards the axis (X) of the closure and designed, in position for actuating the closure element, to be interposed between the projection of said shoulder (4) and said neck (C) matching in shape, when stressed, at least part of the outer curvilinear periphery (b) of the neck upper edge (B).

Description

Description of the invention

The present invention relates to a threaded plug for vessels with liquid substances. 2 Stoppers used for filling liquid substances, such as beverages, in particular, carbonated beverages, contain, in particular, a side skirt with an internal thread, which provides a connection with the threaded neck of the vessel and is connected to an upper platform, inside which sealing means are made, designed for interaction with the upper edge of the indicated neck.

In most cases, the skirt is extended in the lower direction by a protective strip, which is divided into fragile 70 zones covering the annular protrusion made on the neck below the thread.

There are known plugs, described in EP 76778), where the sealing means do not contain a connecting insert and are made together with the plug as a single part. According to this document, the means of sealing contain a rigid rim, made with the possibility of pressing forcefully into the neck of the vessel. However, such an indentation creates stresses in the zone up to the upper platform, which subsequently, under the influence of heat and internal pressure, lead to the appearance of cracks 12 or deformations, which negatively affects both the tightness and the appearance of the plug.

In addition, to ensure a sufficient contact surface between the neck and the side wall of the rim, the latter must have a significant height.

The main consequences of such a configuration are, on the one hand, the need to create an increased twisting moment and, on the other hand, an increase in the danger of a sharp ejection, which occurs when the gas pressure is delayed.

Adding to these negative effects is the use of a single material, such as polyethylene, which has a lower flow resistance than polypropylene, which is used to make conventional plugs with a connecting insert.

Another version of the implementation is described in EP 481 981), where the sealing means are made in the form of a flexible lip, which with 22 bends and crumples with the upper edge of the neck in the position of closing the plug. Go)

However, in order to ensure sufficient tightness, in this case it is also necessary to apply a large torque, because the lip must bend upwards at an angle of at least 90 2 and/or press against the platform.

In addition, control over the deformation of the lip is difficult due to the lack of means of centering the neck. Shk

The variant described in UUO 00/56615 consists in making the flexible lip thinner and longer. aw!

However, the need to lengthen and thin this lip complicates the production of the casting mold and complicates the control of the production process, especially at the cooling stage, which leads to a slowdown in production rates. yu

In addition, the task of this option is to ensure sealing of the entire upper edge of the neck of the vessel

With only one lip. -

At the same time, this option does not provide an optimal degree of tightness, since it does not allow controlling the deformation stress of the lip along such a long length without the use of wedging means on the inner wall of the plug. "

The purpose of this invention is to solve these technical problems to a sufficient extent. З7З 70 According to this invention, this goal is achieved by making a threaded plug of the mentioned type, which is characterized by the fact that the mentioned sealing means contain an external shoulder made in the connection zone between the skirt and the platform, which contains a radial protrusion and holds an elastically deformable a peripheral lip directed in the idle state downwards in the direction of the axis of the plug and made with the possibility of being located between the projection of the specified shoulder and the neck, covering under the action of tension at least part of the outer curved 75 contour of the upper edge of the neck. c deforming inner annular lip, installed in such a way that its free upper edge covers at least the lower contour of the upper edge of the neck under the action of tension in the position of closing the cork. element, installation caught in a traffic jam.

According to another variant, the specified inner lip has a diameter of connection with the platform, equal to c" value, intermediate between the outer and inner diameters of the specified neck, and is inclined relative to the axis of the plug at an angle from 0 to 459.

According to the best distinguishing feature, said inner lip is made with the possibility of being placed under the action of 59 tension in the position of closing the plug between the inner shoulder made together with the lower side

GF) platform, and the neck of the vessel. 7 According to another distinguishing feature, the side of the outer shoulder and/or the inner shoulder, located opposite the neck in the closed position of the stopper, has a back chamfer.

According to another distinguishing feature, a set of radial ribs for rigidity is made in the center of the indicated site. If necessary, these ribs are attached to the inner shoulder.

In accordance with the second variant of implementation, the specified sealing means additionally contain a centering locking rim, made together with the platform and located coaxially and opposite the specified peripheral lip, limiting, together with the specified outer shoulder and/or peripheral lip, an annular recess into which the neck enters in the closed position of the plug . for According to another distinguishing feature, the radially outer side of said rim in its lower part contains a thickening that abuts against the inner side wall of the neck.

According to another distinguishing feature, the height of the part of the rim that goes inside the neck in the position of closing the plug exceeds the idle stroke of the unscrewing, which precedes the distribution of the protective strip.

According to the best feature, said peripheral lip is connected to the underside of the outer shoulder.

According to another distinguishing feature, it includes a first rectilinear section, connected at one end to the specified outer shoulder and extended at its other end through the knee by a second rectilinear section. 70 Mostly, the knee determines the angle between the two segments of the lip, the value of which is in the range from 0 to 605.

Preferably, said peripheral lip or the first segment thereof is inclined relative to the axis of the stopper at an angle of from to 60°.

According to another distinguishing feature, the thickness of the specified peripheral lip, as well as the geometric shape of the outer shoulder, are determined in such a way that the supporting contact between the specified lip and the upper edge 75 of the neck is carried out over the joint planes of the specified neck, which ensures good tightness.

According to a special variant, the lower side contains a locking ring made in the direction of the inner lip.

This invention provides improved tightness of the vessel with the help of a stopper made monobloc from one material through only one forming operation (injection or compression), while relatively low and uniform torques of screwing and unscrewing are provided.

The interaction of flexible lips (peripheral and/or internal) with the corresponding shoulders allows to optimize their deformation and their positioning relative to the sides of the neck.

The present invention will become more apparent from the following description taken with reference to the accompanying drawings, in which:

Fig. 1 A, 2A, ZA and 4A - a cut-away view of four versions of the stopper according to the present invention in an idle state before closing the vessel; at

Fig. 1c and 1C are a partial cut-away view of the embodiment shown in Fig. 1A, respectively, in the position of incomplete closure at the neck and in the position of hermetic closure of the vessel;

Fig. 10 and 1E - a partial view in an opening of two variants of implementation. co

Fig. 2B and 2C are a partial cross-sectional view of the embodiment shown in Fig. 2A, respectively, in the position of incomplete closure at the neck and in the position of hermetic closure; at

Figures 3aB and 3Cs are a partial cross-sectional view of the embodiment shown in Figure 3A, respectively, in the position of partial closure on the neck and in the position of hermetic closure.

Fig. 4B and 4C are a partial cross-sectional view of the embodiment shown in Fig. 4A, respectively, in the position of incomplete closure on the neck and in the position of hermetic closure. rch-

The plug shown in the figures is intended for closing vessels with liquid substances, such as drinks (mineral water, fruit juices, soda water, etc.). These vessels can be made of glass or of plastic material by blowing air into molds. "

As a rule, this plug contains a side skirt 1 with an internal thread 10 connected to an upper platform 2.

The geometric shape and, in particular, the pitch of the thread 10 correspond to the threads E of the neck C of the vessel. The skirt 1 (2) is extended downward by a protective strip 11 through a fragile zone 12, made with the possibility of breaking during the unscrewing of the plug. "" From the inside of the upper platform 2, sealing means are made, designed to interact with the upper part of the neck C and, in particular, with its upper edge B.

The intersection of the upper edge B is limited in the lateral direction by the outer curved contour B (also called the "thin edge") and the inner, usually curved contour B. of the same material, which is mostly polyethylene. (Se) In the variant of implementation shown in Fig. 1A-1C, these sealing means have a radially outer shoulder of 50 4, made in the connection zone between the skirt 1 and the platform 2, which has a radial projection 41 and an elastically deforming peripheral lip 3 , at rest, as shown in Fig. 1A, pointing down in the direction of the X-axis of the plug. Thus, the lip C is located in the way of the upper edge B of the neck C during the screwing of the cork on the vessel.

In the position of incomplete closure, shown in Fig. 1B, the edge B of the neck C comes into contact with the lip 3.

Continuation of twisting leads to gradual deformation of the lip Z under the action of the edge B up to the moment when, under the action of the stresses, the lip Z covers at least part of the outer curvilinear contour 5 of the edge B, at the same time crumpling under the action of the stresses in the space between the shoulder 4 and the indicated neck, as shown in Fig. 1cS, and ime) pressing against the protrusion 41.

Preferably, on the side of the shoulder strap 4, directed to the neck C, a back chamfer 40, 60 is performed above the protrusion 41, which allows to compensate for possible centering defects and deviations in dimensions due to expansion during the implementation of the neck and/or plug.

In order to evenly distribute the deformation stresses along the lip 3, the chamfer 40 of the shoulder 4 and/or the platform 2, located opposite the neck C, according to the variant shown in Fig. ZA-3C, can have a profile that complements the profile of the edge B. of the implementation shown in Fig. 100, the lip C contains the first straight section 31, connected at one end to the lower side of the shoulder strap 4 and extended at its other end through the knee ZO by the second straight section 32.

The knee 30 determines the angle A between the two sections 31, 32, the value of which is positive or negative and ranges from 02 to 60 degrees, on one or the other side of the axis of the first section 31.

Lip Z (and in this case the first section 31) is inclined relative to the X axis of the plug at an angle B, which is from 202 to 6bOg,

Such a geometric shape allows the peripheral lip to cover the upper edge of the neck in the closed position, as shown in Fig. 1C.

Basically, the profile and thickness (from 0.2 to 0.bmm) of the lip 3, as well as the geometric shape of the shoulder 4 and, in particular, the projection 41 are determined in such a way that the lip C tightly covers at least part of the contour 5 of the edge B above the joint planes of the neck (not shown in Fig.), overlapping, if necessary, the adjacent lower part of the curvilinear contour B.

These joint planes are formed by thin vertical ribs obtained as a result of operations during the manufacture of the vessel. Indeed, the formation of the vessel and, in particular, the neck C can be carried out with the help of a mold consisting of two half-molds, which are separated and limit with their contact edges a very narrow gap into which the plastic material can flow, creating defective ribs. These ribs remain on the neck of the vessel after its final processing.

A good tightness can be achieved only if the lip C fits tightly to the smooth surface of the neck C, that is, a surface that does not contain any roughness and is located only above the joint planes.

In the variant shown in Fig. 1E, the peripheral lip C interacts with the centering and/or locking rim 5, made on the lower wall of the platform 2. The lowest point of the rim 5 is located above the level of the free end of the lip C in the non-working state, that is, in the position before closing, as shown in Fig. 1A. Preferably, in the center of the platform 2, a set of radial stiffening ribs 7 are made, which in this case are adjacent to the rim 5.

In the embodiment shown in Fig. 2A-2C, the sealing means contain an inner ring lip 6 that is elastically deformed. at

This annular lip 6 is made together with the platform 2 and is inclined relative to the X axis of the plug at an angle Г, which is from 09 to 452, and has a diameter of connection with the platform 2 with a value intermediate between the values of the outer and inner diameters of the neck C.

Thus, its free end, under the action of tension, covers the inner curved contour B" of the upper edge B.O of the neck C in the position of closing the cork, ensuring tightness in addition to the tightness that is achieved when the peripheral lip C covers the outer contour 6 of the edge B.

In the position shown in Fig. 2C, the inner lip b is located and crumples under the action of tension between (2) the radial protrusion 51, made on the inner shoulder 52, made together with the lower side y of the platform 2, and the upper edge B of the neck in the same way as the peripheral lip Z - between the outer shoulder 4 and the edge of the V. in.

According to not shown in Fig. variant, the lip could be formed or be part of an independent element made in the form of a ring or disk and installed on the bottom of the plug.

The side of the shoulder strap 52, facing the neck C, contains a rear chamfer 50 above the protrusion 51, which performs a function similar to the rear chamfer 40 of the shoulder strap 4.

In the embodiment shown in Fig. ZA-3C, the rim 5 is extended in the lower direction and is located Z c coaxially with respect to the neck C opposite the lip 3. Together with the outer shoulder 4 and the lip Z, the rim 5 limits the annular recess 20, which enters the upper " edge B of the neck C in the closed position, providing centering and additional tightness inside the neck C.

On the lower side of the platform there is a locking ring 21, made in an annular recess 20 in the direction of the lip and 3. The locking ring 21 ensures the localization and concentration of the support forces of the neck C, transmitted by the lip Z along the circumferential line of the platform 2.

Despite the fact that the locking ring 21 is shown only in Fig. 3B and 3C, it can be used in the implementation options shown in other Figs. o 50 The radially outer side of the rim 5 in its lower part contains a thickening 53.

The thickening 53 rests against the inner side wall of the neck C in the position of partial closure (Fig. 3B) and in this position of closure (Fig. 3C), which causes the lower part of the rim 5 to bend inside the neck.

The deviation of the rim 5 and the contact of the thickening 53 with the inner wall of the neck C form a second sealing zone in addition to the sealing zone located along the outer contour 6 of the edge B.

In the version of implementation shown in Fig. 4A-4C, the height of the rim section 5, which goes inside the neck o C in the position of closing the plug, exceeds the length of the idle stroke of the unscrewing, which precedes the separation of the protective strip 11 when the fragile zone 12 breaks. o In these conditions the upper edge B of the neck C during its rise first meets the end of the rim 5 and is the last to depart from this rim during its descent. because Such an arrangement allows you to maintain hermeticity and avoid any untimely escape of gas and/or any contact with the atmosphere, which negatively affects the quality of the liquid substance, even in case of accidental or intentional partial unscrewing, which only leads to the rupture of the fragile zone 12.

The inner wall of the neck is always protected from external influences, which may occur during manufacturing operations, transportation or storage during bulk storage of vessels and/or casting forms, unlike the outer wall, in particular, in the case of used vessels.

It follows that the condition of the internal surfaces of the neck in contact with the inner lip 6 and/or the thickening 53, according to the present invention, due to the interaction of various sealing means, participates in ensuring a very high degree of tightness regardless of the conditions of use.

Claims (16)

2 Formula of the invention 1. A plug for a container with liquid substances, containing a side skirt (1), having, on the one hand, an internal thread (10) and a lower protective strip (11) and connected, on the other hand, to an upper platform (2), on the inner 70 side of which sealing means are made, which are designed to interact with the upper edge (B) of the neck (C) of the vessel and contain an external shoulder (4) made in the zone of connection between the skirt (1) and the platform (2), and the shoulder has a radially inner side designed to move opposite the neck (C) and a lower side carrying a peripheral lip (3) elastically deformable, directed in the idle state downwards in the direction of the axis (X) of the plug and intended, in the closed position of the plug, for the location between the specified shoulder (4) and the specified /5 Torlovina (C), which is characterized by the fact that the specified lip is connected to the lower side of the shoulder in the direction of the zone of connection of the latter with the inner side wall of the skirt (1), simultaneously defining the radial projection (41) on this shoulder (4) is such that h otherwise, in the position of closing the plug, the said lip covers under the action of tension at least part of the outer curvilinear contour (b) of the upper edge (B) of the neck. 2. A stopper according to claim 1, which is characterized by the fact that the indicated sealing means additionally have an internal annular lip (6) that is elastically deformed, positioned in such a way that its free edge under the action of stresses covers at least the inner contour (B) of the upper edge (B ) of the neck in the position of closing the cork. Q. The plug according to claim 2, which is characterized by the fact that said inner lip (b) is formed or is part of an independent annular element installed in the plug. 4. The plug according to claim 2, which differs in that the specified inner lip (6) has a diameter of connection with the sealing surface (2), the value of which is intermediate between the values of the outer and inner diameters of the specified neck (C), and is inclined relative to the axis of the plug at an angle ( 7), which is from 0e to 4592, o 5. The plug according to any of claims 2, C or 4, which is characterized by the fact that the inner lip (6) is specified, in the position of closing the plug, made with the possibility of being located under the action of stresses between, on the one hand, the inner shoulder (52) , made as one whole with the lower side of the platform (2), and on the other side - the neck (C) of the vessel. so so 6. A stopper according to any one of claims 1 or 5, which is characterized in that the side of the outer shoulder (4) and/or the inner shoulder (52), located opposite the neck (C) in the closed position of the stopper, contains a rear chamfer (40 , 50). b 7. A plug according to any of the previous items, which differs in that a set of radial stiffening ribs (7) is made in the center of the specified platform (2). what) 8. A plug according to any of the previous items, which is characterized by the fact that the specified sealing means additionally have a centering and/or locking rim (5), made as one unit with the platform (2) and located coaxially and opposite the specified peripheral lip (3), delimiting together with the indicated outer shoulder (4) and/or lip (3) the annular recess (20) into which the neck (C) enters in the closed position of the plug. 9. A stopper according to claim 8, which differs in that the radially outer side of the specified rim (5) has a thickening (53) in its lower part, which rests against the inner side wall of the neck (C). - about the village 10. A cork according to any of claims 8 or 9, which is characterized by the fact that the height of the rim section (5) that enters the neck in the closed position of the cork exceeds the length of the idle stroke of the unscrewing, which "from" precedes the distribution of the protective strip (11 ). 11. A plug according to any of the previous items, which is characterized by the fact that the specified peripheral lip (3) is connected to the lower side of the outer shoulder (4). -AND 12. A plug according to any of the previous items, characterized in that said peripheral lip (3) has a first straight section (31) connected at one of its ends to said outer shoulder (4) and extended at the other ends through the knee (30) with the second straight section (32). co 13. A plug according to claim 12, which differs in that the knee (30) defines an angle (A) between the two sections (31, 32), the value of which is in the range from 09 to 609, and 14. A plug according to any of the previous items, which is characterized by the fact that the specified peripheral lip (3) or its first section (31) is inclined relative to the axis (X) of the plug at an angle (B) of 202 to 602 , 15. A plug according to any of the previous items, which is characterized by the fact that the thickness of the specified peripheral lip (3), as well as the geometric shape of the outer shoulder (4) are determined in such a way that the supporting contact between the specified lip (3) and the upper edge ( C) of the neck was carried out over the joint planes of the indicated neck. 16. A plug according to any of the previous items, which differs in that a locking ring (21) is made on the lower side of the platform (2) in F, in the direction of the inner lip (3). name) 60 b5