RS103404A - Cup-shaped receptacle and lid - Google Patents

Abstract

A cup-shaped receptacle (c) has an outer bead (10) in its opening area for clipping on a plastic lid (D). The lid has a circumferentially continous clamping groove (1) for receiving the bead. The clamping groove is continued outwards by an elastically deformable constriction (14), and inwards by an outer wall ( 6) of a circumferentially continuous, U-shaped lid recess, the U-web (22) of which is situated below the height position of the constriction and the inner leg wall (23) of which forms a part of a dome (2) wall of a dome which extends upwardly beyond the height position of the constriction. The lid recess extends downwards beyond the height position of the constriction and has an outer diameter at its outer surface which is adapted to the inner diameter of the receptacle wall such that the lid recess functions at least as a centring and guide projection for the lid-clip-on action, which projection slidingly co- operates with the receptacle wall already at least while the bead passes the constriction.

Description

CONTAINER IN THE SHAPE OF A CUP WITH A FLOOD

Field of invention

This invention relates to a cup-shaped container and a lid for such a container.

State of the art

In the plastic lid with a grooved elastic closure for a cup-shaped container described in US patent 5,253,781 A, the outer surface of the outer side wall of the lid groove extends downward only slightly below the raised constriction portion of the lid. The angle of the cone and the outer diameter of the outer surface coincide with the angle of the cone and the inner diameter of the wall of the container so that the outer surface does not come into contact with the wall of the container to a significant extent even when the upper rim of the container, which is made as a curved edge, completely abuts into the connecting groove. Due to the fact that the lower horizontal part of the cover groove has a relatively short outer surface and a large diameter dimension, the connecting groove is tilted inward during the actuation of the grooved elastic closure in closing; this prevents the top rim from moving slightly over the entire circumference, via the taper on the lid. It is necessary to first manually place the lid in a flush position with the container so that the connecting groove coincides with the upper rim of the container and only then close the lid by pressure acting directly on the upper wall of the connecting groove, which is achieved by a circular movement of the hand while pressing. Actuating the grooved elastic closure to close is troublesome, time-consuming, and increases the risk that the top rim of the container will not fit properly into the mating groove of the lid at some points along the circumference of the container opening. This can result in liquid leaking if the full cup is tilted. The lid is easily opened with a bounce if the filled container is overturned, because part of the opening of the container is easily deformed in the direction of the diameter.

Patent US 5,975,344 envisages a PE container (PE-Polyethylene, polyethylene, transl.) of large volume, made by injection molding in molds, which has a cylindrical wall in the area of the upper opening and a lid, made by injection molding in molds, which can withstand high loads, and whose surface is located below the highest part of its rim -

Patent DE 10 057 277 A provides for a tight closure with a lid, which prevents liquid spillage. The upper surface of such a cover (Figures 3 to 6) has a conical or cylindrical depression in the central part. The lower part of the recess has a smaller wall thickness than the upper surface of the lid and has cross-shaped slots cut into it, into which the straw is to be inserted. This kind of cover is a spare part that is installed instead of a normal permanent cover.

Brief description of the invention

The object of this invention is to make a container, as well as a lid corresponding to said container, in which easy actuation of the grooved elastic closure of the lid when closing the lid can be achieved, even by untrained persons, so that the closed lid provides a seal that prevents leakage, and the lid is difficult to fall off when the filled container falls. Although the present invention aims to achieve a high holding force of the lid in the closed position and a perfect seal, the lid must be easily placed on the container.

Since, according to the invention, the outer side wall of the lid has a relatively long side extending downward, the lower horizontal part of the lid groove and the inner side wall together form a rigid outlet which serves to guide and align with the container as the upper rim of the container moves past the constriction on the lid. The connecting groove is automatically precisely centered on the upper rim of the container and the upper rim jumps into the grooved elastic fastener practically in one move and along its entire circumference, through the narrowing on the lid into the connecting groove and that by the force acting mostly only on the upper wall

cover domes. The sliding contact between the outer surface and the wall of the vessel guides the taper on the lid evenly over the upper rim of the vessel, since, thanks to the guidance and centering, the upper rim of the vessel provides uniform downward resistance on all sides

cover down. The guide outlet converts the pressure force acting on the cupola into a downward pulling force uniformly distributed along the cap constriction, thereby pulling the cap constriction evenly past the top rim of the vessel until the top rim of the vessel is properly seated in the mating groove of the cap. The favorable influence of the guide and centering outlet, which is, in fact, a cone or cylinder, and the uniform transmission of force together make it possible to achieve a tight fit between the upper rim of the container and the connecting groove of the lid. The aforementioned tight fit is the result of a relatively narrow tolerance in the dimensioning of the upper rim of the container and the connecting groove of the lid, as well as a certain elasticity. This ensures that the closed lid does not allow leakage and that the upper rim of the container does not fall out of the connecting groove of the lid at any point if the full container happens to tip over. The shape of the dome and the groove of the cap make the construction of the cap very rigid, which allows the force applied to the cap to effectively close the grooved elastic fastener without significantly deforming the cap. A lid that is placed in place on the container significantly secures the open end of the container, resulting in excellent spill protection and good leakage protection.

A particularly important part of the invention is the circular joint mechanism that acts on the entire circumference and is an integral part of the lid. This part allows the lid to be closed easily, in practice with a quick squeeze of the hand. As soon as a force is applied to at least the upper wall of the dome of the lid, the dome descends, the displaced inner side wall tilts the lower horizontal part of the groove down around the joint, which is formed at the transition from the lower horizontal part of the groove to the outer side wall, whereby the resistance to the movement of the narrowing on the lid over the upper rim of the container begins to increase. Tilting of the lower horizontal part of the groove temporarily tends to pull the outer side wall away from the inner wall of the vessel. The contact between the upper rim of the container and the taper on the lid tilts the taper outwards and the connecting groove of the lid spreads somewhat. Due to the action of the closing force or, if necessary, due to automatic or alternative pressing of the outer rim of the lid when the dome is pressed down, the upper rim of the container passes through the constriction on the lid easily and in one move. When the pressure force ceases to act, the lye joint mechanism re-establishes the grip of the lid, that is, the lower horizontal part of the groove returns to the position where it is normal to the axis of the lid and firmly holds the outer side wall against the inner wall of the container. The constriction on the lid is returned behind the upper rim of the container until the upper rim of the container is in a position where it seals tightly and hermetically by applying force to the walls of the coupling groove of the lid. The upwardly projecting dome allows the coupling mechanism to be acted upon by first lowering the dome relative to the lid coupling groove, thus opening the lid coupling groove before the upper rim of the container passes through. After that, the dome returns to its initial state where it is located above the connecting groove of the cover. During the placement of the lid in the closed position, the upper wall of the dome can be lowered by applying force while the palm of the hand holds the outer part of the container, thus easily completing the operation of closing the lid.

The upper rim of the container can be made in the form of a curled rim or fully rolled frame, or a partially rolled rim or half rolled frame, or, alternatively, in the form of a rim with a bent edge. Easy and simple lid closure is achieved in any of these cases, with a leak-free seal and the effect of firmly holding the lid in the closed position. One lid construction fits many bowl top rim constructions.

The lid has been constructed with optimized and easy closing in mind, regardless of the fact that there is a firm hold achieved in the closed position. Thanks to its shape, the lid is relatively rigid in its central area so that the upper rim of the container can easily and completely jump into the connection groove of the lid, as a result of which there is a tight fit with a constant force on the rim of the container, only by pressing in the direction in which it is necessary for the connection groove of the lid to pass over the rim of the container, which is assisted by the guiding of the guide outlet and the temporary expansion of the connection groove of the lid, which is achieved by the relative movement of the dome in relation to the narrowing of cover.

In order to properly perform this function, it may be important that the lower horizontal portion of the groove extends substantially in one plane and substantially normal to the axis of the lid, and also provides an inner sidewall substantially parallel to the axis of the lid. Thanks to these structural features, the integral joint mechanism works properly when the cover is subjected to a vertical downward force, mainly because, for mechanical reasons, the inner sidewall behaves as if it has more strength than the outer sidewall when the lower horizontal part of the groove is tilted, so that, as a consequence, the outer sidewall bends inward, thus temporarily widening the connecting groove of the cover from the inside.

It may be beneficial for the outer surface to come into sliding contact with the vessel wall before the upper rim of the vessel begins to elastically deform the taper on the lid; As a result of this, the lid joint groove and the lid taper, respectively, appear to be placed over the upper rim of the container in a precisely centered position, so that the upper rim of the container will have to overcome substantially the same resistance to passing along the entire circumference and, therefore, easily and evenly snap into the lid connector groove.

When the cone angles of the outer surface and the vessel wall are almost identical, the outer diameter of the outer surface should correspond, at the height of the taper, to at least approximately the inner diameter of the vessel wall in the region of the opening, so that the centering effect and the guiding effect begin to operate before the upper rim of the vessel reaches the taper of the lid. When the upper rim of the container snaps into the joint groove of the lid, the softer container material in particular will plastically deform in the area of the upper rim of the container and the wall of the container, so that a tight connection will occur when the lid is placed in the closed position. In addition or alternatively, the outer sidewall of the lid groove may also be slightly bent inwards, which would be a consequence of the contact pressure between the outer surface and the vessel wall.

The outer diameter of the outer surface within the coupling groove of the lid may even be noticeably larger than the inner diameter of the container wall in the area of the opening, that is, in the area where the inner wall bends towards the outside, thereby creating the upper rim of the container. This dimension ensures that, during the entire movement of the upper rim of the vessel through the constriction on the lid and into the connecting groove of the lid, a significant guiding and centering effect occurs. An excess diameter of about 3.5%o, that is in the region of about 1.5%o to 5%o, depending on the size of the container, can have a beneficial effect.

A noticeable downward extension of the outer surface, beyond the height at which the cap constriction is located, is important to achieve the intended centering and guiding effect.. The cap can be placed in the closed position by simply applying pressure only to a substantial degree on the cap dome. The outer surface can have at least 2.5 times the height of the connecting groove of the cover. Making the outer surface to be 3 times the height, or even 4 times the height of the cover mating groove may even be better. It should be noted that, due to the occurrence of pressure between the outer surface and the wall of the vessel and the existence of a large contact surface, an extremely good sealing effect is achieved, which is complementary to the effect of sealing the upper rim of the vessel in the connecting groove of the lid.

A taper angle between approximately 6° and 12°, that is, a total taper angle between approximately 12° and 24° can be useful. The preferred angle is in the region between approximately 8° and 10°, ie between approximately 16° and 20° overall.

The indentations formed where the top of the dome wall meets the outer wall of the dome aid in easy placement of the cover in the closed position and increase the strength of the dome. In addition, the indentations show the user where to place their fingers and provide grips that allow the lid to be easily separated from a series of stacked lids. Grooved recesses not only provide a place for the lid to be held, but can also define projecting edges against which the lids line up on top of each other to form a proper sequence. Each cover can rest only with the protruding edges of the recess of the top wall of the dome against the next cover so that the strung covers cannot jam together.

In order to achieve a tight fit between the upper rim of the container and the connecting groove of the lid, which is very important for sealing, the radial thickness of the upper rim of the container should be greater than the radial width of the inside of the connecting groove of the lid. The soft paper or cardboard of which the container is made and the material of the container's upper rim, respectively, curve inward and outward as soon as the container's upper rim snaps into the joint groove of the lid. Crushed areas with flat contact surfaces, ie not only with contacts along a single line, cause improved sealing effects.

The radial thickness of the top rim of the container should be between 10% and 20%, preferably approximately 15% greater than the average radial width of the inside of the lid joint groove. This dimensioning results in achieving a good sealing effect and, at the same time, the case that the application of only moderate force is sufficient to place the lid on the container.

In order to improve the effect of holding the lid on the upper rim of the container and to gradually crush the material, the radial width of the inside of the connection groove of the lid can be reduced in the direction opposite to the direction of placing the lid on the container; it would be useful if it decreased with the angle of the cone of the vessel wall. The joint groove of the cover will, in this way, cause a wedge effect until the upper rim of the container finally reaches its end position.

In order to improve the holding effect of the lid on the upper rim of the vessel, at least one area in the form of a ring, with an increased coefficient of friction, should be provided on the outer surface of the outer side wall and/or on the inner wall of the vessel. This can result in increased contact friction between the lid and the container and a stiff container opening area.

A further important aspect of the invention is that the constriction on the lid may consist of successive deeper and shallower indentations, which are made on the outside. Preferably, the deeper recesses have a greater length in the circumferential direction than the shallower recesses. This helps to place the lid in place on the container more easily, resulting in a steady and durable holding effect, as well as stiffening the rim of the lid.

A large number of protrusions, which are turned upwards, can be made in the upper wall of the dome and serve to identify from the outside the type of beverage inside the container, for example Coca-Cola, Diet-Coca-Cola, orange juice, etc. The protrusions can be in the form of buttons that can be pressed.

The next rather important aspect of the invention is the penetration area which is provided in the upper wall of the dome. That area may have a thinner wall thickness than at least the top wall of the dome, and have indentations cut in the form of intersecting lines through which a straw can be easily inserted into the container as the indentations break. Reduced wall thickness results in easier insertion of the straw into the container. A reduction in wall thickness can be achieved by local compaction of the cover material during manufacture. The reduced wall thickness area is particularly useful in relatively rigid lids that have somewhat thicker walls than conventional lids. Designing an area with reduced wall thickness is generally an advantage in all lids, because this type of construction generally makes it easier to insert a straw into the container.

The penetration area for inserting the straw into the container is suitably performed at the bottom of the recess, for example it can be located in the center of the upper wall of the dome. The reduced thickness of the bottom wall increases the strength of the dome, making it easier to place the lid on the container.

The penetration area for inserting the straw can be curved towards the inside, which facilitates the insertion of the straw, and also increases the resistance to the appearance of bulging outwards due to liquid pressure. The presence of the curvature also results in the automatic closing effect of the punched cross-line indentations as the straw is removed from the container and the fluid pressure begins to act from the inside on the vanes defined by the punched cross-line indentations. The edges of the depressions corresponding to two ellipses whose main axes are offset from each other by an angle of 90° increase the strength of the dome and give the dome structure a nicer appearance. Crossed indentations in the form of straw insertion lines are, conveniently, made along the main axes of both ellipses. Instead, it is even enough to bring out only a thin central part of the wall at the bottom to facilitate the insertion of the straw.

Another important aspect of the invention relates to a lid for easy placement on a conical container made of a double wall of paper or cardboard. Containers made of double-walled paper or cardboard generally have a part with an opening where the inner wall of the container is deformed towards the outside in the form of a step, and there it is connected to the outer wall of the container. The upper rim of the container is formed at the upper end of the inner wall of the container. The cone angle of the conical inner wall of the double-walled vessel is greater below the expanded upper area of the opening that forms a continuation of the lower wall of the vessel in the form of a circular protruding edge and has a smaller or even zero cone angle in relation to the lower wall of the vessel. The cover that is placed on the upper rim of the container is already in contact with the inner wall of the expanded upper region of the opening via the centering and guiding cone, when the upper rim of the container comes into contact with the constriction on the cover. When placed in place on the bowl, the lid is centered and guided over the top rim of the bowl. The guide and centering spout is pulled inward by the deformation that occurs between the dome pressed down and the mating groove of the lid, so that the upper rim of the container passes more easily through the constriction on the lid. The lid, after being placed in its place on the container, ensures a good seal and rigidity in the. area of the vessel opening.

It is very useful that the angle of the cone of the outer surface of the outlet for guiding and centering can be either equal to zero or have a value that is smaller than the value of the angle of the inner wall of the vessel. The rigid guide and centering spout forces the top rim of the bowl to snap into position to allow sealing in the lid mating groove and can even cause deformation of the double wall bowl opening area to stiffen the bowl rim and improve sealing.

The guide and centering outlet, in this case, should be extended down the stepped portion of the outer side wall facing inwards and sized to be in tight contact with the vessel wall when the cover is in place. The step-shaped side facing inwards should have a taper angle substantially equal to the taper angle of the inner wall of the vessel below the upper area of the step-shaped opening. The combination between the step-shaped side and the inner wall of the vessel provides an enhanced sealing effect even deep inside the vessel.

Brief description of the drawing

The solutions according to the invention are explained with reference to the figures in which:

Figure 1 is a side view of the cover,

Figure 2 is a cross-section along the axis of the cover of Figure 1,

Fig. 3 is a cross-section along the axis of the vessel for which the lids shown in are intended

pictures 1 and 2,

Figure 4 shows an enlarged cross-section of one stage during the placement of the lid in place on the vessel,

Figure 5 shows a cross-section of the stage where the lid has fully snapped into place

position on the dish,

Fig. 6 is a cross-section along the axis of another cover solution according to the invention,

Figure 7 is a side view of the cover part of Figure 6,

Fig. 8 shows a portion of the lid of Fig. 6 at a stage during the fitting of the lid in place on the vessel where the upper rim of the vessel has just come to taper at

lid,

Figure 9 is a projection corresponding to that of Figure 8, in the phase of the lid snapping into place on the container, in which the connecting groove of the lid is temporarily partially

open when the cover is popped.

Figure 10 is a projection corresponding to that of Figure 8, in the stage where the cover is completely

jumped into his position on the bowl,

Figure 11 is a top view of the dome of the cover shown in Figure 6,

Figure 12 is a cross-section along the axis of the dome shown in Figure 11, along the plane of section XII-XII,

Figure 13 is a cross-section along the axis of another cover solution according to the invention,

Figure 14 is a top view of the cover shown in Figure 13,

Figure 15 is a cover array consisting of multiple covers shown in Figures 13 and

Fig. 16 is a cross-section along the axis of the lid and double-walled vessel in phase

preparations for placing the lid in place on the container,

Figure 17 is a cross-section similar to that of Figure 16, only with the cover which is

fully jumped into position on the bowl,

Figure 18 is a cross-section similar to that of Figure 5, only of another solution according to the invention.

Detailed description of the invention

The lid D, which is intended for use with the cup-shaped container C made of paper or cardboard or plastic material, is, for example, made by extrusion from an elastic plastic material in the form of foil and has a wall thickness of, for example, 0.3 to 0.5 mm (Figure 1). The lid is made in such a way that it can be placed on the surface 9 of the opening of the container C so that said container C is closed so that no liquid can leak out of it and so that the cover D cannot fall off the container, even when the full container C is rummaged through. Cover D (Figure 1) has a circumferential circular continuous mating groove 1 above the plane where the dome 2 continues into the mating groove 1. The dome 2 is separated from the mating groove 1 by a circular and substantially uniform cover groove V and has a substantially flat upper wall 5 of the dome and several circularly arranged depressions 3. Relative to the mating groove 1, the outer side wall 4 of the V groove of the cover (picture 2) extends noticeably downwards behind the plane of the connecting groove 1.

The cover D (Figure 2) is placed in its position in the area 9 of the opening of the container C (Figure 3) with the action of the pressure force R, for example only on the upper wall 5 of the dome in the direction of the snapping of the cover into its position. The upper wall 5 of the dome extends, mostly, parallel to the plane of the cover D. The groove V of the cover has the shape of the letter U in the cross-section and concentrically surrounds the dome 2. The groove V of the cover is bordered by the outer side wall 4, which in this solution according to the invention is made so that it tapers down in the form of a cone, by the lower horizontal part of the groove 22 and by the inner side wall 23 that forms the outer wall of the dome that extends upwards. The outer side wall 4 has its outer surface 6 which continues into the connecting groove 1 of the cover. The outer surface 6 is set at an angle a/2 of the cone, which can correspond, at least to a considerable extent, to the angle a/2 of the cone of the wall 7 of the vessel C.

At the lower end of the wall 7 of the container, as shown in Figure 3, there is the bottom 8 of the container, while the area 9 of the opening of the container is limited by the wall 7 of the container and the upper rim 10 of the container that extends to the outside, which, in the case of a preferred solution, is in the form of a so-called curled edge 11 made of cardboard or paper from which the container itself is made C. In the case where the container is made of plastic, the upper rim 10 of the container can also to be made by injection molding in molds. In this case, the upper rim of the container can be in the form of a rim curled in the form of a semicircle instead of a full circle, or a frame rim of the container that extends outwards.

Figure 4 shows the cover D placed on the upper rim 10 of the container, which is made in the form of a curved edge 11. The narrowing 14 of the cover D rests on the upper rim 10 of the container.

The outer side wall 4 is continued at its upper end by a wall 12 which extends approximately parallel to the plane of the cover and a circular parapet 13. The parapet 13 extends approximately parallel to the axis of the cover D down to the taper 14. The taper 14 may be made in the form of a recess in the form of a notch made on the outside and fonrr the inner rounded ridge 15. The ridge 15 and the taper 14 may be continuous in a circular direction, or, in the case of an alternative solution, they can be formed in the form of individual local depressions between which (which is shown in the picture with a broken line) an external contour is formed. The narrowing 14 is extended downwards by one wall 16, which is inclined towards the outside and defines the slope 17 of the groove closure. The second parapet 18 extends downwards from the wall 16 and ends with the outer rim 19. The height of the second parapet 18 can be lower than shown in the picture.

The radial thickness Y of the upper rim 10 of the container, measured at the point of transition from the straight wall 7 of the container to the curvature of the upper rim 10 of the container, can be greater than the radial inner width Yl of the connecting groove 1 of the lid. The radial thickness Y can be greater than the inner width Yl by 10% to 20%, and it is preferable to be greater by about 15%. In the connecting groove 1 of the cover, the radial inner width Yl is gradually reduced, preferably with the cone angle a/2, in the direction from the taper 14 towards the wall 12.

The connecting groove 1 of the lid defines a length L between the ridge 15 and the inner side of the wall 12. The outer side wall 4 extends in the downward direction beyond the height of the taper 14 and for a length LI, which can have a value of at least 2.5 values of the height L, and, preferably, 3 values of the height L, and, even more preferably, 4 values of the height L or more.

The outer diameter Dl of the outer surface 6 of the outer side wall 4, in height at the point of narrowing 14 (for example ridge 15), at least largely corresponds to the inner diameter D7 of the wall 7 of the container at the place of the upper rim 10 of the container, that is, at the point of transition from the straight wall 7 of the container to the curvature of the upper rim 10 of the container, which is directed towards the outside. The outer diameter D2 of the outer surface 6 of the outer side wall 4 at the junction with the wall 12 is even noticeably larger than the inner diameter D7, preferably by about 1.5%o to 5.0%o, preferably by about 3.5%o.

When the pressure force R acts on dome 2, as shown in Figure 4,. the outer surface 6 is already in sliding contact with the vessel wall 7, sooner or later

as soon as the upper rim 10 of the container reaches the narrowing 14 of the cover. The lid groove V forms a centering and guiding groove K which aids and facilitates easy snapping of the lid D into its position on the bowl. It is useful that the sliding contact is made even before the upper rim 10 of the container reaches the narrowing 14 of the lid. When the lid D is pressed downwards even further, the upper rim 10 of the container elastically deforms the constriction 14 so that it expands outwards; during this process and the upper rim. 10 of the container is also slightly deformed before it passes over the ridge 15 and falls into the connecting groove 1 of the cover (as shown in Figure 5). The overlapped hatched areas shown in Figure 5 show the narrowed surfaces 20, 21 which are formed in the upper rim 10 of the container and the wall 7 of the container, thereby achieving the effects of sealing, retention in the desired position and stiffening. As a supplement or additional possibility, also the outer side wall 4 can be slightly curved in the direction towards the inner side (which is shown by broken lines 21').

The cover D shown in Figures 6 to 10 differs from the cover D shown in Figures 1 to 5 in that the construction of the taper 14 is modified and there is a recess 24 in the upper wall 5 of the dome. The narrowing 14 (shown in Figure 7) is formed by alternating deeper and shallower recesses 16a, 16b, which follow one another. The depressions 16a, 16b form the inner ridge 15' in the form of a winding line. The deeper recesses 16a may have a greater length in the circumferential direction than the shallower recesses 16b. In addition, Fig. 7 shows a parapet 18 shortened by a broken line 19'.

Figure 6 shows a recess 24 having a lower dome area 25 of limited dimensions and substantially parallel to and placed below the upper wall 5 of the dome. The thickness of the wall x cover D is, to a considerable extent, constant. Only area 25 is thinner (thickness xl), which is achieved, for example, by compressing the material. Area 25 is located in the middle of the upper wall of the 5 dome. In order to insert the straw through the lid, breakable recesses 26 in the form of lines are made in the area 25. Additionally, it would be advantageous if the area 25 were curved towards the inside of the dome 2.

The recesses 3, at the junction of the top wall 5 of the dome and the inner side wall 23, increase the strength of the dome 2 and allow the lid D to be grasped with the fingertips, for example to remove the lid D from a row of lids and to place the lid D on the container C. The pressing force R to place the lid in place on the container can even act via the recesses 3 on the dome. However, preferably, easy closure can be achieved by pressing the palm of the hand against the flat top wall 5 of the dome.

As shown in Fig. 6, the outer side wall 4 may have at least one circular area 30 in the form of a hoop in which the coefficient of friction is increased to achieve the effect of enhanced holding in the desired position as soon as the lid D snaps into place on the container. The area 30 can be placed at a higher height than shown in the figure, or it can be narrower or wider. A corresponding area with an increased friction coefficient can also be provided on the wall 7 of the vessel, or instead of the area 30 on the cover or together with the area 30 provided on the cover D.

The circular joint mechanism M, which acts continuously over the entire circumference, is integrated into the cover D by the construction and shape of the dome 2 and the groove V of the cover. A hinged mechanism can assist in snapping the cover D into its closed position on the container, as particularly shown in Figures 6 to 10.

The circular joint mechanism M of the cover D has a dome 2, an inner side wall 23, a lower horizontal part 22 of the groove and an outer side wall 4. The transitions of the outer side wall 4 into the lower horizontal part 22 of the groove and the lower horizontal part 22 of the groove into the inner side wall 23 define joints 29. The inner side wall 23 extends, to a considerable extent, parallel to the longitudinal axis of the cover, while the lower horizontal part 22 of the groove is flat and normal to the axis of the cover. It should be noted that due to the stiffness of the dome 2 and the smaller diameter of the inner side wall 23 compared to the larger diameter of the outer side wall 4, the outer side wall will bend inwards more easily than the inner side wall 23. This effect is used to temporarily widen the coupling groove 1 of the cover and to achieve easy snapping of the cover into place on the container.

As shown in Fig. 8, the cover D is placed on the upper rim 10 of the container C so that the entire circular elongated portion 14 is centered on the upper rim 10 of the container. The outer side wall 4 comes into contact with the wall 7 of the container. Now the force R to press the lid into the closed position is applied, for example, to the upper part of the wall 5 of the dome, for example with an open fist, until the upper part of the wall 5 of the dome is not lowered (as shown in Fig. 9).

As shown in Fig. 9, the resistance force R' acts in the opposite direction to the force R to press the lid into the closed position, since the constriction 14 rests on the upper rim 10 of the container. The inner side wall 23 inclines the lower horizontal part 22 of the groove in a downward direction over the inner joint 29 at the point of transition of the inner side wall 23 and the lower horizontal part 22 of the groove. Thanks to the rigidity of the dome 2 in the radial direction, the tilting of the lower horizontal part 22 of the groove results in the generation of a force 28 that acts on the outer joint 29. The force 20 releases the outer side wall 4 from the wall 7 of the container, so that even the connecting groove 1 of the lid can expand to some extent on the inner side. The parapet 18 is moved due to the action of the resistance force R' in the direction towards the outer side which is shown by the arrow 27, so that even the connecting groove 1 of the cover can be somewhat temporarily expanded on the outer side. Under the action of the force R to press the lid into the closed position, and since the upper wall 5 of the dome is lowered, which means that it can also be pressed against the wall 12, the upper rim 10 of the container slides along the constriction 14 until it finally fits into the connecting groove 1 of the lid.

As shown in Figure 10, the force R to press the lid into the closed position has stopped working. The lower horizontal part 22 of the groove, due to the action of elastic forces, returns to the position in which it is, to a considerable extent, normal to the axis of the cover and presses the outer side wall 4 against the wall 7 of the container. Parapet 8 also returns to its original position due to the action of elastic forces. The connecting groove 1 of the cover firmly holds the upper rim 10 of the container. The centering outlet K and the connecting groove 1 together significantly stiffen the bowl opening C.

As shown in Figure 11, the recess 24 has a wall contour in the shape of a four-mouth clover, that is, a shape that can be indicated by two ellipses of equal dimensions, the major axes of which are placed at an angle of 90°. Indentations 26 in the form of lines, in area 25, extend along the main axes of both ellipses. Figure 12 shows the difference between wall thickness x and wall thickness XI in area 25 in an exaggerated ratio. The region 25 may be curved inwards, as shown in the figure, or may be parallel to the upper wall 5 of the dome. A reduced thickness xl of the wall is not required in the entire area 25. It would be sufficient to produce only a thin central part of the wall in the area 25, for example by compressing the material during the production of cover D.

The width in the radial direction of the circular lower horizontal part 22 of the groove, which is shown in Figures 6 to 10, may have a value of about 10% of the outer diameter of the cover D, while the diameter of the upper wall 5 of the dome may have a value of about 60% of the outer diameter of the cover D.

The lid solution D shown in Figures 13 and 14 is similar to the solution shown in Figures 6 to 12, but has evenly distributed protrusions 5a in the upper wall 5 of the dome which serve to determine the type of beverage. There are, for example, four oval protrusions 5a for determining the type of beverage, each of which has a marking and/or pressing button formed on its top. This is standard equipment on many covers on the market. The protrusions 5a are placed at a small distance in the radial direction with respect to the outer edge of the upper wall 5 of the dome and, also, at a small distance in the radial direction with respect to the central recess 24. In addition, the recesses 3 are made with grooves, so that they can be more easily grasped by the fingertips when the cover D is to be removed from a series of stacked covers (as shown in Fig. 15). Each recess 3 can define a side projecting edge 3a which can serve as a stop part when stacking the covers one on top of the other, as shown in Fig. 15, with the projecting edge 3a resting on the upper wall 5 of the dome of the next cover D in the sequence. The side projecting edge 3a prevents, which is useful, the strung covers from jamming with each other, because the strung covers are in contact with each other mainly at the point where the projecting edges 3a rest against the upper wall 5 of the dome and where the outer side walls come into contact with each other. This feature results in a neat and compact array from which each cover D can be easily removed. In the solution shown in the picture, eight recesses 3 are made in the cover.

The lid D shown in Figures 13 to 15 also has a centering and guide outlet K (guide cone) and a hinged mechanism M to facilitate placing the lid in place on the vessel.

.Figures 16 and 17 show cover D for easy positioning on a double-wall vessel CD. The double-wall container CD has an inner wall 7 and an outer wall 7c with a gap between them filled with air, which achieves the effect of thermal insulation. The upper rim 10 of the container is formed on the upper end of the inner wall 7. The double-walled container CD is first formed with a taper angle a/2 that continues to the upper rim 10. During the forming process, the upper part of the inner wall 7 expands outwardly so that the opening region 9a occurs at a point where the taper angle a'/2 is smaller than the taper angle a/2, or even almost equal to zero, and so that forms a protruding edge 7b. The cover D for the double-walled vessel CD has the outlet K already described above for centering and guiding. In this case, the outlet K is formed such that the outer surface 6 is either cylindrical (as shown in the figure) or has a small taper angle (3/2 which has a value between 0° (cylindrical shape) or a value similar to but smaller than the taper angle a'/2. The outer surface 6 or the outer side wall 4 is extended into the step-shaped portion 4b facing inwardly, so that a projecting edge 4a is formed. 6a of the outer surface of the wall part 4b is inclined at a cone angle a/2. The bottom of the outlet K for centering and guiding is formed by the lower horizontal part 22 of the groove which extends, to a considerable extent, normal to the central axis of the lid. The diameter Dl of the outer surface 6 corresponds mainly to the diameter D7 of the opening area 9a of the upper rim 10. In the area 9a of the opening the inner parts of the inner wall 7a of the container of the outer side wall 4 and part 4b of the walls are made to deform or come into close contact, in which they press against each other, when the lid D has fully snapped into place on the double-walled vessel CD.

As shown in Figure 16, the lid D is centered on the double wall container CD so that the upper rim 10 approaches the taper 14 on the lower side. Then the outer surface 6 has already come into contact with the inner wall 7a of the container in the region 9a of the container opening, thus properly centering and guiding the cover D when the force R acts to press the cover into the closed position, for example on the upper wall 5 of the dome (which is not shown in Fig. 16).

While the force to press the lid into the closed position forces the constriction 14 to pass over the upper rim 10, the outer surface 6 guides the lid D. When the lower horizontal part 22 of the groove is inclined downwards, as already described above, the outer side wall 4 moves somewhat inwardly, while the constriction 14 curves outwardly. This helps the taper 14 to easily slide over the top rim 10 until it is in the position shown in Figure 17. The top rim 10 is then engaged both externally and internally. The parts of the wall in contact (20 and 20') can be compressed. The projecting edge 4a either rests on the projecting edge 7b or is at least close to the projecting edge 7b. A certain contact pressure is achieved in the area 20', which results in an additional sealing effect, with the sealing effect achieved by the cooperation between the connecting groove 1 of the cover and the upper rim 10 of the container, as well as between the outer side wall 4 and the inner part 7a of the container wall. As shown in Fig. 17, the rigid structure of the lid dome D can even force the inner portion 7a of the vessel wall to be placed in a parallel position with respect to the outer side wall 4, resulting in a large force holding the lid in place on the vessel and an excellent sealing effect and a noticeable stiffening of the opening region of the closed vessel CD.

In addition to this, the engagement between the protruding edges 4a, 7b can have the effect of stopping the movement of the cover towards the container, thus preventing the upper rim of the container from being too deformed. The projecting edges 4a, 7b which abut each other can even keep the upper rim 10 of the container and the connecting groove 1 of the lid in a prestressed closed state, which is indicated by a high degree of sealing and a high value of the force holding the lid D relative to the container.

Fig. 18 is a cross-sectional view of the lid D in place in the closed position on a single-walled container C, similar to that shown in Fig. 5. The upper rim 10 of the container is fully curled inward. The connecting groove 1 of cover D has a circular cross-section. Cross-hatched areas represent areas of firm contact, for example even slightly crushed areas of surfaces. There is also solid contact between the connecting groove 1 of the cover and the upper rim 10 of the container over more than 180° of the circumference of the upper rim 10. The outer side wall 4 significantly stiffens the upper area of the opening and prevents deformations in the radial direction.

Claims (26)

1. Container (C). in the form of a cup, specially made of paper or cardboard, which has a lid (D), made of plastic material, with a grooved elastic closure; the area (9) of the opening of the container (C) which is limited by the conical wall (7) of the container, which is beveled in the direction upwards and outwards, and the upper rim (10), which extends in the direction towards the outer side, and in particular the curved edge (11); the cover (D) is made with an orx>bottom connecting groove (1) which is open on the lower surface of the cover to allow the upper rim (10) to enter it, the connecting groove (1) has an outer lower boundary region and an elastically expandable constriction (14) on the inner side of the cylindrical or conical outer surface (6) of the outer side wall (4) of the groove (V) which extends circumferentially and is U-shaped in cross-section, the lower horizontal part (22) of the groove (V) of the cap is located below the point of constriction (14) in height, the inner side wall (23) of the groove (V) is part of the wall of the dome (2) having the upper wall (5) of the dome located above the constriction and the connecting groove in height, respectively, indicated that the groove (V) of the cap is made with such a depth that it extends noticeably in the downward direction away from the point of constriction (14) by in height and having an outer diameter (Dl) on the outer surface (6) at the height of the taper (14) which corresponds to the inner diameter (D7) of the wall (7) of the container at the place of the upper rim (10), so that during the easy installation of the cover (D) in its place on the container, the outer surface (6) of the groove (V) of the cover has the function of an outlet (K) for centering and guiding the cover, in conjunction with the sliding contact with the wall (7) of the container, at least until the upper rim (10) it passes through the constriction (14) and jumps into the connecting groove (1), during which the pressure force (R) to close the cover, directed vertically downward, mainly acts on the dome (2). 2. Container according to patent claim 1, characterized by the fact that the dome (2) and the groove (V) of the lid together form an integral, in the direction of the continuous circle, the joint mechanism (M) which serves to temporarily open the connecting groove (1) by moving the outer side wall (4) in the direction towards the inside, while the narrowing (14) rests, under the action of the pressure force (R), on the upper rim (10) vessels. 3. The container according to patent claim 1, indicated by the fact that it is the bottom 4. the horizontal part (22) of the groove is, to a considerable extent, flat and, essentially, normal to the axis of the cover, as well as in that the inner side wall (23) extends, to a considerable extent, parallel to the axis of the cover. 4. The container according to patent claim 1, characterized by the fact that the outlet (K) for centering and guiding the cover is designed to act in cooperation, by sliding contact, with the wall (7) of the container before the upper rim (10) of the container on the lower side reaches the narrowing (14). 5. The container according to patent claim 1, characterized by the fact that the outer diameter (Dl) of the outer surface (6) corresponds, to a considerable extent, to the position along the height of the taper (14), at least the inner diameter (D7) of the wall (7) of the container in the area of the opening (9), as well as by the fact that the angles of the cone (a/2) of the wall (7) of the container and the outer conical surface (6) are at least approximately equal. 6. A container according to claim 5, characterized in that, in the connecting groove (1), the outer diameter (D2) of the outer surface (6) is noticeably larger than the inner diameter (D7) of the wall (7) of the container in the area of the opening (9), preferably by approximately 1.5% to 5.0%, preferably by approximately 3.5%. 7. A vessel according to claim 1, characterized in that the outer surface (6) extends downwardly beyond the narrowing position (14) in height by a length (LI) equal to at least 2.5 times the length (L) of the connecting groove (1). 8. Container according to patent claim 1, characterized by being external the surface (6) extends in a downward direction away from the constriction position (14) in height by at least a length (LI) equal to at least 3 times the length of internal height (L), preferably even 4 times longer than the height (L) of the connecting groove (1). 9. The container according to patent claim 1, characterized by the fact that the value of the cone angle (a/2) lies approximately in the range between 6° and 12°, preferably between approximately 8° and 10° 10. The container according to patent claim 1, characterized by the fact that the dome (2) has depressions (3) distributed around a circle, preferably four or eight evenly distributed depressions (3) of identical dimensions and identical depth, at the transition between the upper wall (5) of the dome and the inner side wall (23) extending upwards. 11. A container according to claim 10, characterized in that each recess (3) has an undercut notch in the inner side wall (23) for finger acceptance. 12. Container according to patent claim 10, characterized by the fact that each recess (3) has a lower protruding edge (3a) which serves as a stop when the lids are lined up. 13. The container according to patent claim 1, characterized by the fact that at least one circular area (30) in the form of a ring is formed on the outer surface (6), the mentioned outer side wall (4), and/or the wall (7) of the container; said area (30) has an increased coefficient of friction compared to the immediate surroundings of said area (30). 14. The container according to patent claim 1, characterized by the fact that the thickness (Y), in the radial direction, of the upper rim (10) of the container is greater than the inner width (Yl), in the radial direction, of the connecting groove (1). 15. The container according to patent claim 14, characterized by the fact that the thickness (Y), in the radial direction, of the upper rim (10) of the container is greater than the average of the inner width (Yl), in the radial direction, of the connecting groove (1) by approximately 10% to 20%, preferably by approximately 15%. 16. Container according to patent claim 14, characterized by the fact that the inner width (Yl), in the radial direction, of the connecting groove (1) decreases from the narrowing (14) onwards in the direction opposite to the direction of closing the lid. 17. Lid (D), made of plastic material, designed specifically for a conical container (C) made of paper or cardboard, which has an outer upper rim (10) in the area (9) of the opening, the lid (D) has a connecting groove (1) made, which is open on the lower surface of the lid so that the upper rim (10) can enter it, the connecting groove (1) is extended at the outer end into an elastically expandable constriction (14), and the lower on the inner lower and, therefore, cylindrical or conical outer surface (6) of the outer side wall (4) of the groove (V), which extends in a circle and has, to a considerable extent, the shape of the letter U in cross-section, in the lower horizontal part (22) of the groove located below the narrowing point (14) in height, the inner side wall (23) of the groove (V) of the cover is part of the wall of the dome (2) which has the upper surface (5) which is located noticeably above of the narrowing (14) and the connecting groove (1) in height, indicated by the fact that the groove (V) of the cover is made with such a depth that it noticeably extends downwards away from the point of narrowing (14) in height and that it has an outer diameter (Dl) on the outer surface (6) and, essentially, at the point of narrowing (14) in height, so that the groove (V) of the cover defines an outlet (K) for centering and guiding the cover, which serves for easy placing the cover (D) on the upper rim (10) of the container (C). 18. The cover according to patent claim 17, characterized by the fact that the dome (2) and the groove (V) of the cover together form an integral, continuous in the direction of the I, hinged mechanism (M) that serves to temporarily open the connecting groove (1) by moving the outer side wall (4) in the direction of the interior, the mentioned hinged mechanism (M) performs its function during the closing of the lid, mainly by the pressure force (R) acting on the upper surface (5). dome, by moving the dome in relation to the connecting groove (l). 19. The cover according to patent claim 17, characterized by the fact that the narrowing (14) consists of alternating deeper and shallower recesses (16a, 16b), which follow each other in a circle, made on the outside, with the fact that, which is desirable, the deeper recesses (16a) have a greater arc length than the shallower recesses (16b). 20. The lid according to patent claim 17, indicated by the fact that it has evenly distributed protrusions (5a) in the upper wall 5 of the dome, which serve to determine the type of drink 21. The lid (D), made of plastic material, intended especially for a conical container (C) made of paper or cardboard, which has an outer upper rim (10) in the area (9) of the opening, the lid (D) has a connection groove (1) made, which is open on on the lower surface of the cover so that the upper rim (10) can enter it, the connecting groove (1) extends at the outer lower end into an elastically expandable constriction (14), and on the inner lower and, therefore, cylindrical or conical outer surface (6) of the outer side wall (4) a groove (V), which extends in a circle and has, to a considerable extent, the shape of the letter U in cross section, into the lower horizontal part (22) groove located below the point of narrowing (14) in height, the inner side wall (23) of the groove (V) of the cover is part of the wall of the dome (2) having an upper surface (5) located substantially above the taper (14) and the connecting groove (1) in height, characterized in that the penetration area (25) of predetermined dimensions is formed in the upper wall (5) of the dome, the penetration area (25) has a smaller thickness (xl) of the wall at least than the thickness (x) of the upper wall of the dome, and by the fact that the area (25) for penetration has made breakable recesses (26) in the form of lines that serve to insert the straw into the container. 22. A lid according to patent claim 21, characterized in that the penetration area (25) has a bottom of a recess (24) of a thin wall formed in the top wall (5) of the dome, the bottom is located below the top wall (5) of the dome, and the small thickness (xl) of the bottom is achieved by local pressing of the material in production. 23. A cover according to claim 21, characterized in that the penetration area (25) is curved in the direction towards the interior of the dome (2). 24. A cover according to patent claim 22, characterized in that the recess (24) is placed, essentially, in the center of the upper wall (5) of the dome, and in that the recess (24) has side wall contours which, to a significant extent, correspond to two overlapped ellipses of equal dimensions, the main axes of which are offset relative to each other by an angle of 90°, and in that said breakable recesses (26) in view lines extend along the intersecting main axes of the ellipse. 25. Lid (D), made of plastic material, designed specifically for a double-walled conical container (CD) made of paper or cardboard, which has an outer upper rim (10) in the conical stepped area (9a) of the opening, the cover (D) has a connection groove (1) made, which is open on the lower surface of the cover to allow the upper rim (10) to enter it, the connection groove (1) is extended at the outer lower end into an elastically expandable constriction (14), and at the inner lower and, therefore, the cylindrical or conical outer surface (6) of the outer side wall (4) groove (V), which extends in a circle and has, to a considerable extent, the shape of the letter U in cross-section, in the lower horizontal part (22) of the groove located below the narrowing point (14) in height, the inner side wall (23) of the groove (V) of the cover is part of the wall of the dome (2) which has the upper surface (5) which is located noticeably above the narrowing (14) and the connecting groove (1) in height, indicated by the fact that the groove (V) of the cover is made with such a depth that it extends noticeably in the downward direction away from the narrowing point (14) in height and that it has a diameter (Dl) on the outer surface (6) and, to a considerable extent, at the narrowing point (14) in height, so that the groove (V) of the cover defines an outlet (K) for the external centering and guiding the cover, which, in conjunction with the conical stepped area (9a) of the opening of the container (CD) of the double wall, allows easy fitting of the cover (D) on the upper rim (10). 26. A cover according to claim 25, characterized in that the outer surface (6) of the outer side wall (4) is made with a cone angle value between 0° and a value smaller than the cone angle value of the conical stepped area (9a) of the opening. 27. The lid according to patent claim 25, characterized in that the outlet (K) for centering and guiding the lid continues in the downward direction with an edge (4a, 4b, 6a) protruding inwardly, so dimensioned as to be in conjunction, in the form of a connection with the flap, with the area of the wall (7) of the container located below the conical stepped area (9a) of the opening. 28. A container (C, CD) in the shape of a cup, specially made of paper or cardboard, which has a lid (D), made of plastic material, with a grooved elastic closure; the area (9) of the opening of the container (C) which is limited by the conical wall (7) of the container, which is beveled in the direction upwards and outwards, and the upper rim (10), which extends in the direction towards the outer side, and in particular the curved edge (11); the lid (D) is made with a circumferential joint groove (1) which is open on the lower surface of the lid to receive the upper rim (10), the joint groove (1) has an outer lower boundary region and an elastically expandable constriction (14) on the inside of the cylindrical or conical outer surface (6) of the outer side wall (4) of the groove (V) which extends circumferentially and is U-shaped in cross-section, the lower the horizontal part (22) of the groove (V) of the cover is located below the point of narrowing (14) in height, the inner side wall (23) of the groove (V) is a part of the wall of the dome (2) having the upper wall (5) of the dome located above the narrowing and the connecting groove in height, respectively, characterized by the fact that the groove (V) of the cover is made with such a depth that it noticeably extends in the downward direction away from the point of narrowing (14) in height and which has an outer diameter (Dl) of the outer surface (6) at the height of the taper (14) which corresponds to the inner diameter (D7) of the wall (7) of the container at the place of the upper rim (10), so that during the easy installation of the cover (D) in its place on the container, the outer surface (6) of the groove (V) of the cover has the function of an outlet (K) for centering and guiding the cover, in conjunction with the sliding contact with the wall (7) of the container, at least until the upper rim (10) passes through the narrowing (14) and jumps into the connecting groove (1), during which the pressure force (R) to close the lid, directed vertically downward, mainly acts on the dome (2); and by the fact that the outlet (K) for centering and guiding the cover and the connecting groove (1), which jumped into its position when the cover is closed, together form a strengthening construction of the circular surface of the container opening which prevents deformations of the circular surface of the container opening in the radial direction. 1. A container (C) in the form of a cup, specially made of paper or cardboard, which has a lid (D), made of plastic material, with a grooved elastic closure; the area ■ (9) of the opening of the container (C) which is limited by the conical wall (7) of the container, which is beveled in the direction upwards and outwards, and the upper rim (10), which extends in the direction towards the outer side, and in particular the curved edge (11); the lid (D) is made with a circumferential joint groove (1) which is open on the lower surface of the lid to receive the upper rim (10), the joint groove (1) has an outer lower boundary region and an elastically expandable constriction (14) on the inside of the cylindrical or conical outer surface (6) of the outer side wall (4) of the groove (V) which extends circumferentially and is U-shaped in cross-section, the lower the horizontal part (22) of the groove (V) of the cover is located below the point of narrowing (14) in height, the inner side wall (23) of the groove (V) is a part of the wall of the dome (2) having the upper wall (5) of the dome located above the narrowing and the connecting groove in height, respectively, indicated by the groove (V) of the cover is made with such a depth that it noticeably extends downwards away from the point of narrowing (14) in height and which has an outer diameter (Dl) of the outer surface (6) at the height of the taper (14) which corresponds to the inner diameter (D7) of the wall (7) of the container at the place of the upper rim (10), so that during the easy installation of the cover (D) in its place on the container, the outer surface (6) of the groove (V) of the cover has the function of an outlet (K) for centering and guiding the cover, in conjunction with the sliding contact with the wall (7) of the container, at least until the upper rim (10) passes through the narrowing (14) and jumps into the connecting groove (1), during which the pressure force (R) to close the lid, directed vertically downwards, mainly acts on the dome (2). 2. Container according to patent claim 1, characterized by the fact that the dome (2) and groove (V) of the lid together form an integral, circularly continuous, articulated mechanism (M) that serves to temporarily open the connecting groove (1) by moving the outer side wall (4) inward, while the narrowing (14) rests, under the action of the pressure force (R), on the upper rim (10) of the container. 3. A container according to claim 1, characterized in that the lower horizontal part (22) of the groove is substantially flat and, essentially, normal to the axis of the cover, and in that the inner side wall (23) extends, to a significant extent, parallel to the axis of the cover. 4. Container according to patent claim 1, characterized in that the outlet (K) for centering and guiding the cover is designed to act in cooperation, in sliding contact, with the wall (7) of the container before the upper rim (10) of the container on the lower side reaches the narrowing (14). 5. The container according to patent claim 1, characterized in that the outer diameter (Dl) of the outer surface (6) corresponds, to a significant extent, to the position along the height of the taper (14), at least the inner diameter (D7) of the wall (7) of the container in the area of the opening (9), as well as in that the cone angles (a/2) of the wall (7) of the container and the outer conical surface (6) are at least approximately equal. 6. Container according to patent claim 5, characterized in that, in the connecting groove (1), the outer diameter (D2) of the outer surface (6) is noticeably larger than the inner diameter (D7) of the wall (7) of the container in the area of the opening (9), preferably by approximately 1.5%o to 5.0%o, preferably by approximately 3.5%o. 7. A vessel according to claim 1, characterized in that the outer surface (6) extends downwardly beyond the narrowing position (14) in height by a length (LI) equal to at least 2.5 times the length (L) of the connecting groove (1). 8. Container according to patent claim 1, characterized by the fact that the outer surface (6) extends in the downward direction away from the narrowing position (14) in height at least for a length (LI) that is equal to at least 3 times the length of the inner height (L), preferably even 4 times the length of the height (L) of the connecting groove (1). 9. A vessel according to claim 1, characterized in that the value of the cone angle (a/2) lies approximately in the range between 6° and 12°, preferably between approximately 8° and 10° 10. Container according to patent claim 1, characterized in that the dome (2) has depressions (3) distributed in a circle, preferably four or eight evenly distributed depressions (3) of identical dimensions and identical depth, at the transition between the upper wall (5) of the dome and the inner side wall (23) that extends upwards. 11. A container according to claim 10, characterized in that each recess (3) has an undercut notch in the inner side wall (23) for finger engagement 12. Container according to patent claim 10, characterized in that each recess (3) has a lower protruding edge (3a) which serves as a stop when the lids are lined up. 13. The container according to patent claim 1, characterized by the fact that at least one circular area (30) in the form of a ring is formed on the outer surface (6), the mentioned outer side wall (4), and/or the wall (7) of the container; said area (30) has an increased coefficient of friction compared to the immediate surroundings of said area (30). 14. The container according to patent claim 1, characterized by the fact that the thickness (Y), in the radial direction, of the upper rim (10) of the container is greater than the inner width (Yl), in the radial direction, of the connecting groove (1). 15. A container according to claim 14, characterized in that the thickness (Y), in the radial direction, of the upper rim (10) of the container is greater than the average inner width (Yl), in the radial direction, of the connecting groove (1) by approximately 10% to 20%, preferably by approximately 15%. 16. Container according to patent claim 14, characterized by the fact that the inner width (Yl), in the radial direction, of the connecting groove (1) decreases from the narrowing (14) onwards in the direction opposite to the direction of closing the lid. 17. Lid (D), made of plastic material, designed specifically for a conical container (C) made of paper or cardboard, which has an outer upper rim (10) in the area (9) of the opening, the lid (D) has a connecting groove (1) made, which is open on the lower surface of the lid so that the upper rim (10) can enter it, the connecting groove (1) is extended at the outer end into an elastically expandable constriction (14), and the lower on the inner lower and, therefore, cylindrical or conical outer surface (6) of the outer side wall (4) of the groove (V), which extends along the bed and has, to a considerable extent, the shape of the letter U in cross-section, in the lower horizontal part (22) of the groove located below the narrowing point (14) in height, the inner side wall (23) of the groove (V) of the cover is part of the wall of the dome (2) which has the upper the surface (5) which is located noticeably above the narrowing (14) and the connecting groove (1) in height, indicated by the fact that the groove (V) of the cover is made with such a depth that it noticeably extends downwards away from the point of narrowing (14) in height and that it has an outer diameter (Dl) on the outer surface (6) and, essentially, at the point of narrowing (14) in height, so that the groove (V) of the cover defines an outlet (K) for centering and guiding the cover, which serves to easy placement of the cover (D) on the upper rim (10) of the container (C). 18. The cover according to patent claim 17, characterized by the fact that the dome (2) and the groove (V) of the cover together form an integral, circularly continuous, joint mechanism (M) that serves to temporarily open the connecting groove (1) by moving the outer side wall (4) inward, the mentioned joint mechanism (M) performs its function during the closing of the cover, mainly by the pressure force (R) acting on the upper surface (5). dome, by moving the dome in relation to the connecting groove (l). 19. '"' Cover according to patent claim 17, characterized in that the narrowing (14) consists of alternating deeper and shallower recesses (16a, 16b), which follow each other in a circle, made on the outside, with the fact that, which is desirable, the deeper recesses (16a) have a greater arc length than the shallower recesses (16b). 20. The lid according to patent claim 17, characterized in that it has evenly distributed protrusions (5a) in the upper wall 5 of the dome that serve to determine the type of drink 21. The lid according to patent claim 17, characterized by the fact that the area (25) for penetration, of previously determined dimensions, is formed in the upper wall (5) of the dome, the area (25) for penetration has a smaller thickness (xl) of the wall at least than the thickness (x) of the upper wall of the dome, and that the area (25) for penetration has made breakable depressions (26) in the form of lines that serve to insert a straw into the container and that the area (25) for penetration has a thin-walled recess bottom (24) formed in the upper wall (5) of the dome, the bottom is located below the upper wall (5) of the dome, and the small thickness (xl) of the bottom is achieved by local pressing of the material in production. 22. A cover according to patent claim 21, characterized in that the recess (24) is placed, essentially, in the center of the upper wall (5) of the dome, and in that the recess (24) has side wall contours which, to a considerable extent, correspond to two overlapped ellipses of equal dimensions, the main axes of which are displaced relative to each other by an angle of 90°, and in that the said breakable recesses (26) in view lines extend along the intersecting main axes of the ellipse. 23. Cover (D), made of plastic material, intended specifically for a double-walled conical container (CD) made of paper or cardboard, having an outer upper rim (10) in a conical stepped area (9a) of the opening, the cover (D) having a connection groove (1) made, which is open on the lower surface of the lid so that the upper rim (10) can enter it, the connecting groove (1) extends at the outer lower end into an elastically expandable constriction (14), and on the inner lower and, therefore, the cylindrical or conical outer surface (6) of the outer side wall (4) of the groove (V), which extends in a circle and has, to a considerable extent, the shape of the letter U in cross section, into the lower horizontal part (22) of the groove which is located below the point of constriction (14) in height, the inner side wall (23) of the groove (V) of the cover is part of the wall of the dome (2) which has the upper a surface (5) located substantially above the constriction (14) and the connecting groove (1) in height, indicated by the fact that the groove (V) of the cap is made with such a depth that it extends downwardly away from the point of constriction (14) in height and that it has an outer diameter (Dl) on the outer surface (6) and, to a considerable extent, in the point of constriction (14) in height, so that the groove (V) of the cap defines an outlet (K) for centering and guiding the lid, which, in conjunction with the conical stepped area (9a) of the opening of the double-wall container (CD) allows the lid (D) to be easily placed on the upper rim (10). 24. A cover according to claim 23, characterized in that the outer surface (6) of the outer side wall (4) is made with a cone angle value that is between 0° and a value that is smaller than the cone angle value of the conical stepped area (9a) of the opening. 25. A lid according to patent claim 23, characterized in that the outlet (K) for centering and guiding the lid continues downwards with an edge (4a, 4b, 6a) protruding inwardly, so dimensioned as to be in conjunction, in the form of a connection with the flap, with the area of the wall (7) of the container located below the conical stepped area (9a) of the opening 26. A container (C, CD) in the shape of a cup, specially made of paper or cardboard, which has a lid (D), made of plastic material, with a grooved elastic closure; the area (9) of the opening of the container (C) which is limited by the conical wall (7) of the container, which is beveled in the direction upwards and outwards, and the upper rim (10), which extends in the direction towards the outer side, and in particular the curved edge (11); the lid (D) is made with a circumferential joint groove (1) which is open on the lower surface of the lid to receive the upper rim (10), the joint groove (1) has an outer lower boundary region and an elastically expandable constriction (14) on the inside of the cylindrical or conical outer surface (6) of the outer side wall (4) of the groove (V) which extends circumferentially and is U-shaped in cross-section, the lower the horizontal part (22) of the groove (V) of the cover is located below the point of narrowing (14) in height, the inner side wall (23) of the groove (V) is a part of the wall of the dome (2) having the upper wall (5) of the dome located above the narrowing and the connecting groove in height, respectively, characterized by the fact that the groove (V) of the cover is made with such a depth that it noticeably extends in the downward direction away from the point of narrowing (14) in height and which has an outer diameter (Dl) of on the outer surface (6) at the height of the narrowing (14) that corresponds to the inner diameter (D7) of the wall (7) of the container at the place of the upper rim (10), so that during the easy installation of the cover (D), on its own. place on the container, the outer surface (6) of the groove (V) of the lid has the function of the outlet (K) to center and guide the lid, in conjunction with the sliding contact with the wall (7) of the container, at least until the upper rim (10) passes through the narrowing (14) and jumps into the connecting groove (1), during which the pressure force (R) to close the lid, directed vertically downward, mainly acts on the dome (2); and by the fact that the outlet (K) for centering and guiding the cover and the connecting groove (1), which jumped into its position when the cover is closed, together form a reinforcing structure of the circular surface of the container opening which prevents deformations of the circular surface of the container opening in the radial direction.