PT1367001E - Cup-shaped receptacle and lid - Google Patents

Abstract

A lid (D) is provided to be clipped on an outer bead (10) of an opening area of a cup-shaped receptacle. The lid has a circumferentially continuous clamping groove (1) for receiving the bead (10). The clamping groove (1) is continued outwards by an elastically deformable constriction (14), and inwards by an outer wall (4) of a circumferentially continuous, U-shaped lid recess (V), the U-web of which is situated below the height position of the constriction (14) and the inner leg wall (23) of which forms a part of a dome wall of a dome (2) which extends upwardly beyond the height position of the constriction (14). The lid recess (V) extends downwards beyond the height position of the constriction (14) and has an outer diameter (D1) at its outer surface (6) which is adapted to the inner diameter (D7) of the receptacle wall (7) such that the lid recess (V) 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

DESCRIPTION " RECEPTACLE CONFIGURED IN CUP AND COVER " The present invention relates to a cup-shaped receptacle and a cover for such a receptacle.

In the plastic cap for fitting over the cup-shaped receptacle in US 5253781 A, the outer surface of the wall of the outer recess member of the cap extends downwardly slightly beyond the height position of the constriction. The conicity angle and outer diameter of the outer surface correspond to the angle of conicity and the inner diameter of the receptacle wall such that the outer surface does not come into significant contact with the receptacle wall even when the receptacle rim, which is implemented as a rolled edge, is fully seated on the securing tear. Due to the comparatively short outer surface and the large radial dimension of the U-shaped membrane of the recess of the cap, the clamping feature is inclined inwardly during the engagement movement; this prevents the collar from moving smoothly along the entire circumferential length beyond the constriction. It is first necessary to manually center the cap with the clamping groove neatly on the collar and then engage the cap by pressure, acting directly on the upper wall of the clamping groove with a rotating, sliding movement of the hand. This engaging action is problematic, time-consuming and increases the risk that the collar does not properly fit the securing feature at some locations along the circumference of the opening of the cup. This has the effect of the liquid being able to quit when the full beaker is tilted. The lid easily jumps inadvertently if the entire receptacle drops, because the opening region of the beaker easily deforms radially. It is an object of the present invention to provide a receptacle, as well as a cap which is suitable for said receptacle, by means of which an easy snap action of the cap can be obtained, even by awkward persons, so that the engaged cap is leakproof and jump hard when the full glass drops. Although the invention is intended to provide a high lid retention force and perfect tightness, the lid should be easily engaged.

Since, according to the invention, the wall of the outer member has a relatively long downward extension, the U-shaped membrane of the cover recess and the wall of the inner member usually comprise a rigid centering and guiding projection, which slidingly contacts the receptacle wall at least as soon as the collar passes beyond the constriction. The locking groove is precisely centered automatically on the collar and the collar is engaged substantially at a time and along its entire circumferential length beyond the constriction within the locking groove by applying pressure essentially only on the wall top of the dome. The sliding contact between the outer surface and the wall of the receptacle guides the constriction uniformly over the collar, since, thanks to guiding and centering, the collar generates a uniform resistance against downward movement of the cap anywhere. The guiding projection converts the pressure applied to the dome in a downwardly oriented traction force distributed evenly along the constriction to pull the constriction evenly beyond the collar until the collar is correctly positioned in the securing groove. This advantageous effect of the centering and guiding projection, which in practice is a cone or a cylinder and the uniform transmission force, enable, in a joint action, to provide a strong pressure fit between the collar and the securing tear, resulting in said snap-fit of a relatively narrow dimensioning between the collar and the fastening groove and a given elasticity, this ensures that the fitted cap prevents loss of liquid and that the collar does not leave even the locating groove locally if the collar cup full fall. The shape of the dome and recess of the closure result in a rigid structure integrated in the closure through which structure the applied engaging force effectively engages the closure without significant deformation of the closure. The nested cap clearly reinforces the opening area of the receptacle resulting in spill action as well as action against excellent liquid losses.

A particularly important aspect of the invention is a continuously operating circumferential hinge mechanism integrated in the cap. This allows you to easily fit the lid, in practice, with a quick hand grip. As soon as the pressure is applied to at least the top wall of the dome, the dome is lowered, the wall of the displaced inner member inclines the U-shaped membrane downwardly about the hinge formed at the transition between the U-shaped membrane and the U- wall of the outer member as soon as the resistance to movement of the constriction on the collar begins to increase. The inclining movement of the U-shaped membrane temporarily tends to pull the wall of the outermost member 3 away from the inner wall of the receptacle. The contact between the collar and the constraint inclines the constriction to the outside and the attachment tear slightly diverges. Due to the snapping pressure or, if necessary, also by automatically or alternately pressing the periphery of the outer cover while the dome is pushed downwards, the collar easily passes the constriction and in one go. When the pressure ceases, the hinge mechanism restores the lid engagement, i. the U-shaped membrane returns to a position essentially perpendicular to the axis of the cap and firmly retains the wall of the outer member against the inner wall of the receptacle. The constriction returns behind the collar until the collar is pressure sealed and hermetically sealed in the securing feature. The upwardly projecting dome enables the coupling mechanisms to be actuated by first lowering the dome relative to the fastening feature and opening the fastening feature before the collar slides therethrough. The dome then returns to its initial raised position. During engagement, the upper dome wall can be lowered through the applied pressure until the palm acts on the periphery of the cap to easily complete the engagement action. The rim of the receptacle may be formed as a rolled-in collar or a fully rounded rim, or a partially rolled rim or a half-rounded rim or, on the contrary, as an outwardly folded rim flange. An easy and comfortable engagement action of the cap is obtained in any case, resulting in action against loss of final liquid and in the effect of retention of the stable cap. A lid design fits many designs of flanges. 4 The cover is designed for optimum and easy fitting action, despite a strong snap-fit in the snap-fit condition. Thanks to its shape, the cap is relatively rigid in its central region so that the collar can be easily and completely engaged in the securing groove in a snap fit with just application by pressing only in the engagement direction, with the aid of guiding the guiding projection and temporarily opening the securing feature through a movement of the dome relative to the constriction.

For this function, it may be important that the U-membrane extends substantially planar and substantially perpendicular to the axis of the closure and that the wall of the inner member is substantially parallel to the axis of the closure. Due to these structural features, the integral hinging mechanism works well when downward pressure is applied to the cap mainly because, for mechanical reasons, the wall of the inner member behaves more rigidly than the wall of the outer member, when the U-shaped membrane is inclined, so that consequently the wall of the outer member has to yield inwardly and thereafter temporarily opens the securing groove on the inner side.

It may be advantageous that the outer surface cooperates slidably with the wall of the receptacle just before the collar begins to deform the constriction elastically. this has the effect that the clamping feature and the constriction respectively are placed on the collar in a perfectly centered position such that the collar has to substantially extend over the same resistance to pass over its entire circumferential length and thus be easily and evenly into the securing slot. 5

When the conicity angles of the outer surface and the wall of the receptacle are approximately identical, the outer diameter of the outer surface must correspond, at the position of height of the constriction, to at least approximately the inner diameter of the receptacle wall in the opening area, of so that the centering and guiding effect begins just before the ridge reaches the constriction. When the collar engages the securing tear, especially the softer material of the receptacle will yield to the collar and the wall of the receptacle so that a strong effective engagement is established when the cap is engaged. In addition or alternatively, the wall of the outer member of the cap recess may also yield slightly inwardly as a consequence of the contact pressure between the outer surface and the wall of the receptacle. The outer diameter of the outer surface on the securing tear may be even sharply greater than the inside diameter of the wall of the receptacle in the opening area, i.e., when the inner wall curves outwardly into the collar. This measure ensures that, during the total movement of the collar beyond the constriction to the interior of the securing feature, significant guiding and centering is performed. An excessive diameter of approximately 3.5%, i.e., may be advantageous. e., in a range between approx. 1.5% and 5%, depending on the size of the receptacle.

A sharply downward extent of the outer surface beyond the height position of the constriction is important for the intended centering and guiding effect. The cap may be engaged through a mere application of pressure, substantially only over the dome. The outer surface 6 may be at least 2.5 times the height of the securing tear. If you have 3 times the height or even 4 times the height of the attachment tear can be even better. It should be noted that due to the pressure between the outer surface and the wall of the receptacle and through a large contact area, an extremely effective sealing effect will result, in addition to the sealing effect of the collar on the securing tear.

A conicity angle between approx. 6 ° and 12 °. i.e., an overall taper angle of between approx. 12 ° and 24 °. A preferred angle range is between approx. 8 ° and 10 °. e., between approx. 16 ° and 20 ° in total.

The depressions formed where the top of the top dome wall joins the wall of the outer dome, facilitate easy snap action of the cap and increase stiffness of the dome. In addition, depressions provide visual cues about where to apply the fingers and define grip points to comfortably remove the cap from a stack of lids. Cut-out depressions do not just provide a grip for the hand, but they may even define a pair of bucket collars. Each cover can only remain with the collars of the depressions on the upper dome wall of the next cover, so that the covers on the stack are not blocked.

In order to obtain a strong pressure fit between the collar and the fastening groove, which is important for the sealing effect, the radial thickness of the collar should be greater than the radial inner width of the fastening groove. The soft paper or carton material of the receptacle and the collar material respectively yield on the inner side and the outer side as soon as the collar is seated on the securing tear. The zones 7 compressed with planar contact areas, i. not only in-line contacts, result in an improved sealing effect. The radial thickness of the collar should be between 10% and 20%, preferably approx. 15% greater than the average radial inner width of the securing feature. Such sizing results in a good sealing effect and, at the same time, only moderate forces are required to engage the cap on the receptacle.

In order to improve the retention effect of the cap on the collar and to gradually compress the material, the radial inner width of the securing tear may decrease in a direction opposite the engagement direction; advantageously with the conicity angle of the receptacle wall. The locking feature will thereby produce a wedge effect until the collar finally seats in place.

In order to improve the retention effect of the engaged cover, at least one band-like zone with an increased coefficient of friction must be provided on the outer surface of the wall of the outer member and / or the inner wall of the receptacle. This may result in increased frictional engagement between the cap and the receptacle and in an opening region of the rigid cup.

Another important aspect of the invention is that the constriction may consist of successive deeper and deeper depressions formed from the outside. Preferably, the deeper depressions are larger in the circumferential direction than the shallow depressions. This facilitates the engagement action, but results in a stable and durable retention effect and reinforces the periphery of the cap.

A plurality of protrusions may be provided to distinguish beverages that project upwardly in the top wall of the dome to permit identification of the type of liquid from the outside, e.g. cola, cola, orange juice, etc. The protrusions may be push buttons.

Another generally important aspect is a penetration region formed in the top wall of the dome. This region may have a thinner wall thickness than at least the upper dome wall and has intersecting striated lines through which a straw can be comfortably introduced by breaking the fluted lines. The reduced wall thickness allows you to insert the straw more easily. The reduced wall thickness may be produced by local compression of the cap material. The reduced wall thickness region is particularly useful for a relatively rigid lid, which has a slightly thicker wall than such conventional lids. The existence of the finer region, however, is a general advantage for all similar covers, because this measure generally facilitates the introduction of a straw. The penetration region for introducing a straw is advantageously provided at the bottom of a recess, e.g. located in the center of the upper dome wall. The thickness of the reduced bottom wall increases the stiffness of the dome in view of the easy snap action. The penetration region may be curved inwardly to facilitate the introduction of a straw and increase the resistance against deformation to the outside due to the pressure of the liquid. The curvature also leads to an automatic closing effect of the broken scored lines after the straw is withdrawn and when the liquid pressure acts from the inside on the flaps defined by the broken scored lines. A contour contour corresponding to two ellipses, whose main axes are off-centered relative to one another by 90 °, increases the stiffness of the dome and offers an attractive appearance of the dome design. Striated lines are advantageously formed along the major axes of both ellipses. It may be sufficient to have only a thin-walled core portion of the bottom as an alternative to facilitate introduction of a straw.

Another important aspect of the invention is directed to an easy-fit lid for a paper or double-walled carton receptacle. The paper or dual wall carton receptacles conventionally have an aperture area where the wall of the inner receptacle is deformed outwardly on a step and is attached to the wall of the outer receptacle. The collar is formed on the upper end of the wall of the inner receptacle. The conicity angle of the conical inner wall of the double walled receptacle is larger below the enlarged upper aperture area which forms a continuation of the lower receptacle wall through a circumferential collar and has a smaller or even zero conicity angle, than the bottom receptacle wall. The lid placed on the collar already contacts the inner wall of the widened opening area through the centering and guiding cone, when the collar contacts the constriction. During the engagement action, the cap is centered and guided over the collar. The centering and guiding projection is drawn inwardly due to the deformation that occurs between the downwardly pressed dome and the securing tear, so that the collar more easily passes the constriction. The cap, when engaged, provides an action against high liquid losses and stiffness in the opening region of the receptacle.

Advantageously, the conicity angle of the outer surface or the centering and guiding projection may be zero or have a value which is less than the angular value of the conicity angle of the inner wall of the receptacle. The rigid centering and guiding projection forces the collar into a liquid-loss-proof housing condition in the securing tear and may even cause a deformation of the opening area of the dual-wall receptacle for purposes of reinforcing and sealing the portion of board. The centering and guiding projection in this case should continue downwardly through an inner step portion of the wall of the outer member, dimensioned for a joint action of snap fit with the wall of the receptacle. The inwardly stepped portion should have an angle of taper essentially equal to the conicity angle of the wall of the inner receptacle below the upper stepped opening area. The joint action between the stepped portion and the inner wall of the receptacle, provides an increased sealing effect even deeper within the receptacle.

Embodiments of the invention are explained with reference to the drawings, in which: Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. 1 is a side view of a cap, is a cut along the axis of the cap of Fig. 1, is a section along the axis of a receptacle in which the cap of Fig. 1 and Fig. 2 is intended to be used. , shows an enlarged cross-sectional view of a stage during the cap engaging operation on the receptacle, shows a cross-sectional view of a stage in which the cap has been fully engaged on the receptacle, is an axial cross-sectional view of another shape is a side portion of a cap portion of Figure 6, in a step of the cap engaging action, in which the rim of the receptacle has already reached the constriction is a portion of a portion of the cap of Fig. 6, in a step of the cap engaging action, in which the rim of the receptacle has already reached the constriction, is a view corresponding to Fig. 8, in a step in which the the lid is properly engaged, Fig. 11 is a top plan view of the lid of Fig. 6; Fig. 12 is an axial section in the center of the dome of Fig. 11 in section plane XII-XII, Fig. 13 is an axial cross-sectional view of another embodiment of a cap, Fig. 14 is a top view of the cap of Fig. 13 from above, Fig. 15 is a stack of caps consisting of several caps of Figs. 13 and 14, Fig. 16 is an axial cross-sectional view of a lid and a double wall receptacle in a preparatory step of a cap engaging action, Fig. 17 is a cross-sectional view similar to Fig. 16 with the cap fully engaged in the double walled receptacle, and Fig. 18 is a cross-sectional view similar to Fig. 5 of another embodiment.

A lid D, for use in a cup-shaped receptacle C consisting of paper or paperboard or plastic material is e.g. formed from sheet material of elastic plastic and has a wall thickness of, e.g. 0.3 to 0.5 mm (Fig. 1). The cap is adapted to be engaged in an opening area 9 of the receptacle C so that said receptacle C is closed in a manner free of liquid losses 13 and so that the cap D does not come out, even if the receptacle C full fall. The cover D (Fig. 1) is provided with a circumferentially continuous, continuous securing slot 1, above which plane a dome 2 is positioned on the inner side of the securing slot 1. The dome 2 is separated from the securing feature 1 by a recess v of the substantially uniform circumferential lid and is provided with an upper wall 5 of the essentially planar dome and a plurality of circumferentially distributed depressions 3. With respect to the securing tear 1, a wall 4 of the outer member of a recess V of the cap (Fig. 2) extends sharply downwardly beyond the plane of the securing tear 1. The lid D (Fig. 2) is engaged over the opening area 9 of the receptacle C (Fig. 3) applying a pressure R, e. only on the upper wall 5 of the dome in the engaging direction. The top wall 5 of the dome extends essentially parallel to the plane of the cap D. The recess V of the cap has a U-shaped cross-section and concentrically surrounds the dome 2. The recess V of the cap is connected by the wall 4 of the outer member, which in this embodiment conically tapers downwardly through a lower membrane 22 and a wall 23 of the inner member forming a wall of the upwardly extending outer dome. The wall 4 of the outer member has an outer surface 6 that extends into the securing portion 1. The outer surface 6 is disposed at an angle a / 2 of taper, which may correspond at least essentially to the taper angle α / 2 of a receptacle wall 7, of the receptacle C.

At the lower end of the receptacle wall 7 in Fig. 3, a receptacle bottom 8 is disposed, while the receptacle opening area 143 is delimited by the receptacle wall 7 and by an outwardly projecting collar 10, in a preferred manner, a so-called rolled edge 11 consisting of cardboard or paper material of the receptacle C. In the case of a plastic receptacle, the collar 10 may also be produced by injection molding. The collar may alternatively be only a half-corrugated collar or an edge flange of the receptacle which projects outwardly. 4 shows the cover D on the collar 10, which is formed as a curled edge 11. A constriction 14 of the cap D remains on the collar 10. The wall 4 of the outer member is continued at the upper end through a wall 12 extending approximately parallel to the plane of the cap and through a circumferential vertical plate 13. The vertical plate 13 extends approximately parallel to the axis of the lid D down to the constriction 14. The constriction 14 may be a notch-like depression from the outside and forms an inner round top. The top 15 and the constriction 14 may be continuous in the circumferential direction or, alternatively, may be formed by individual local depressions between which (indicated by broken lines) the outer contour approximately continues. The constriction 14 is continued downwardly by an outwardly inclined wall 16 defining a ramp 17 of engagement. From the wall 16, another downward vertical plate 18 extends, terminating in an outer flange 19. The height of the other vertical plate 18 may be smaller than shown. The radial thickness Y of the collar 10 measured in the transition from the wall 7 of the right receptacle to the curvature of the collar 10, 15 may be greater than the radial inner width Y1 of the securing portion 1. The radial thickness Y may exceed the inner width Y 1 by 10% to 20%, preferably by approx. 15%. In the securing tear 1 the radial interior width Yl gradually decreases, preferably with the angle a / 2 of taper from the constriction 14 towards the wall 12. The securing tear 1 defines a length L between the top 15 and the inner side of the wall 12. The wall 4 of the outer member extends downwardly from the height position of the constriction 14, of a length L1 which may be equal to at least 2.5 times the height L , preferably 3 times, and still more preferably 4 times the height L or more. The outer diameter D1 of the outer surface 6 of the outer member wall 4 in the height position of the constriction 14 (e.g., the top 15) corresponds at least to the inner diameter D7 of the receptacle wall 7 in the collar 10, the transition from wall 7 of the right receptacle to the curvature directed outwardly of the collar 10. The outer diameter D2 of the outer surface 6 of the wall 4 of the outer member in the union with the wall 12 is even sharply greater than the diameter D7, preferably of approx. 1.5% to 5.0%, preferably of approx. 3.5%.

When the pressure R is applied on the dome 2 in Fig. 4 the outer surface 6 already contacts slidably with the wall 7 of the receptacle before or as soon as the collar 10 reaches the constriction 14. The recess v of the cap forms a projection K centering and guiding support which facilitates and facilitates the easy engagement operation of the cap D. It will be advantageous if the sliding contact is established even before the collar 10 reaches the constriction 14. When the cap D is pressed further downwardly, the collar 10 will deform the constriction 14 elastically outwardly; in the course of this process, the collar 10 is also slightly deformed before it moves over the top 15 and engages the interior of the securing portion 1 (Fig. 5). The cross-filled regions shown in Fig. 5 indicate squeezed areas 20, 21 formed in the collar 10 and receptacle wall 7 to promote sealing, retention and reinforcement effects. Alternatively or in addition, also the wall 4 of the outer member may yield slightly inwardly (indicated by broken lines 21 '). The cap D in Figs. 6 to 10, differs from the cap D of Figs. 1 through 5 by a modified design of the constriction 14 and by a recess 24 in the upper wall 5 of the dome. The constriction 14 (Fig. 7) is formed by successively alternating deeper and shallower depressions 16a, 16b. The depressions 16a, 16b form a raised interior 15 'configured as a corrugated line. The deeper depressions 16a may be longer in the circumferential direction than the less deep depressions 16b. Further, Fig. 7 shows through a dotted line 19 'a shortened vertical plate 18.

In Fig. 6 the recess 24 has a lower dome region 25 of substantially parallel dimension and located below the top wall 5 of the dome. The thickness x of the wall of the cap D is substantially constant. Only region 25 is finer (thickness x 1), e.g. by compression of the material. The region 25 is situated in the center of the top wall 5 of the dome. To introduce a straw, the region 25 is formed with crossbred breakable tear lines 26. Advantageously, the region 25 may be curved towards the inner side of the dome 2.

The depressions 3 in the transition from the top wall 5 of the dome to the wall 23 of the inner member increase the stiffness of the dome 2 and enable the lid D to be grasped with the fingertips, e.g. in order to more easily remove the cap D from a stack of caps and to place the cap D on the receptacle C. The engaging force R may even be applied through the depressions 3 on the dome. Preferably, however, the snap action can be carried out by pressing the palm of the hand on the upper wall 5 of the uniform dome.

In Fig. 6 the wall 4 of the outer member may have at least one band-like circumferential region 30 in which the coefficient of friction is increased so as to obtain an intensified retention effect as soon as the cap D is engaged. Zone 30 may be higher than shown or may be narrower or wider. A respective zone may be provided with a coefficient of friction also increased in the receptacle wall 7, rather than the zone 30 in the cap or as a joint action with the zone 30 provided in the cap D.

A circumferentially continuous hinging mechanism M is integrated in the cap D by the design and shape of the dome 2 and by the recess V of the cap. The hinge mechanism may assist in the engagement of the cap D, as shown particularly in Figs. 6 to 10. The mating mechanism M of the cap D consists of the dome 2, the wall 23 of the inner member, the U-shaped membrane 22 and the wall 4 of the outer member. The transitions of the wall 4 of the outer member 18 to the U-shaped membrane 22 and the U-shaped membrane 22 to the wall 23 of the inner member define hinges 29. The wall 23 of the inner member extends essentially parallel to the longitudinal axis of the lid, while the U-shaped membrane 22 is planar and perpendicular to the axis of the cap. It should be noted that due to the stiffness of the cup 2 and due to the smaller diameter of the inner member wall 23 relative to the larger diameter of the outer member wall 4, the wall of the outer member will more readily pass into the interior than the wall 23 of the inner member. This effect is used to temporarily open the securing tear 1 and to obtain an easy cap engagement action.

In Figure 8 the cap D is placed over the collar 10 of the receptacle C so that the total circumferential extent of the constriction 14 is centered over the collar 10. The wall 4 of the outer member contacts the wall 7 of the receptacle. At this time, a locking force R, e. in the upper wall 5 of the dome, e.g. by the open hand until the upper wall 5 of the dome is lowered (Fig. 9).

In FIG. 9 a reaction force R 'acts against the engaging force R, as the constriction is seated on the collar 10. The wall 23 of the inner member oscillates the U-shaped membrane 22 downwardly through the inner joint 29 in the transition of the inner member wall 23 to the U-shaped membrane 22. Thanks to the radial stiffness of the dome 2, oscillation of the U-shaped membrane 22 results in a force 28 acting on the outer hinge 29. The force 20 releases the wall 4 from the outer member of the wall 7 of the receptacle, so that the securing slot 1 can open slightly on the inner side. The vertical plate 18 moves outwardly towards an arrow 27 by the reaction force R ', so that also the securing slot 1, temporarily, can open slightly in the outer side. Under the engaging force R and because the top wall 5 of the dome is lowered, possibly by then also pressing against the wall 12, the collar 10 slides past the constriction 14 until it is finally tightly engaged within the securing feature 1.

In Fig. 10, the engagement force R has ceased. The U-shaped membrane 22 has elastically returned to the orientation essentially perpendicular to the axis of the cap and presses the wall 4 of the outer member against the wall 7 of the receptacle. The vertical plate 8 also returned by elasticity. The securing tear 1 firmly retains the collar 10. The centering projection K and the securing tear 1 significantly reinforce the opening portion of the receptacle C.

In Fig. 11, the recess 24 has a wall contour such as a four-leaf clover, i. a contour which can be characterized by two equally sized ellipses whose main axes are offset by 90 °. Lines 26 striated in region 25 extend along the major axes of both ellipses. Fig. 12 shows the difference between wall thickness x and wall thickness XI in region 25 on an exaggerated scale. The region 25 may be curved inwardly as shown, or may be parallel to the top wall 5 of the dome. The reduced wall thickness x1 is not required throughout the region 25. It may be sufficient to provide only a central portion of the thin wall region 25, e.g. by compression of the material during the production of the cap D. The radial width of the annular U-shaped membrane 22 in Figs. 6 to 10, may be equivalent to about 10% of the outer diameter of the cap D, while the diameter of the upper cap wall 5 may be equivalent to approximately 60% of the outer diameter of the cap D. The embodiment of cap D of FIGS. 13 and 14 is similar to the embodiment of Figs. 6 to 12, but is additionally provided with protrusions 5a to distinguish regularly distributed beverages from the top wall 5 of the dome. There are, and. four oval flaps 5a for distinguishing the beverages, each having a marking and / or a push-button at its top. This is a conventional equipment of many covers on the market. The protrusions 5a are located with a small radial distance from the outer edge of the top wall 5 of the dome and also with a small radial distance from the central recess 24. Further, the depressions 3 are cut out so that they can be gripped more readily by the fingertips, when the lid D has to be removed from a stack of several covers (as shown in Fig. 15). Each depression 3 may define a side collar 3a which may serve as a stacking stopper as shown in Fig. 15 so that the collar 3a remains on the top wall 5 of the dome of the next lid D of the stack. The collar 3a advantageously prevents the stacked covers from being attached to one another because the stacked covers contact each other, especially at the location where the collars 3a remain on the top wall 5 of the dome and at the location where the walls of the outer member contact each other. This feature results in an orderly and dense stack from which each of the covers D can be comfortably removed. 21

In the embodiment shown, there are provided eight depressions 3. The cover D of Figs. 13 to 15 also has the centering and guiding projection K (a guiding cone) and the pivot mechanism M for facilitating the engagement action.

FIGS. 16 and 17 show an easy-to-fit lid D for a double wall CD receptacle. The dual wall CD receptacle has an inner wall 7 and an outer wall 7c, with an air gap therebetween to provide a thermal insulation effect. The collar 10 is formed at the upper end of the inner wall 7. The double walled CD receptacle is first formed with an angle a / 2 of taper which continues to the collar 10. During the forming process the upper part of the inner wall 7 is enlarged outwardly so that the aperture area 9a results in the location where the angle a '/ 2 of taper is smaller than the angle a / 2 of taper or even almost zero and so that a collar 7b is formed. The cover D for the double walled CD receptacle has the centering and guiding projection K already described. In this case, the projection K is formed such that the outer surface 6 is cylindrical (as shown), or has a β / 2 angle of small taper between 0 ° (cylindrical) or a similar but smaller value than the angle α Of conicity. The outer surface 6 or the wall 4 of the outer member is continued by a stepped wall portion 4b inwardly so that a collar 4a is formed. The outer surface portion 6a of the wall portion 4b is inclined at an angle a / 2 of taper. The lower portion of the centering and guiding projection K is formed by the U-shaped membrane 22 which extends substantially perpendicular to the center cap axis. The diameter D1 of the outer surface 6 corresponds essentially to the diameter D7 of the opening area 9a in the region of the collar 10. In the opening area 9a are indicated interior parts of the wall 7 of the inner receptacle and exterior parts of the wall 4 of the outer member, and of the wall portion 4b to be deformed or to come into intimate pressure contact, when the lid D is fully engaged in the double walled CD receptacle.

In Fig. 16 the cover D is centered on the double walled CD receptacle, so that the collar 10 has reached the constriction 14 below. Thereafter the outer surface 6 already contacts the wall 7a of the inner receptacle in the opening area 9a to properly center and guide the cap D, when the engagement pressure R is applied, e.g. on the top wall 5 of the dome (not shown in Fig. 16).

At the same time as the snapping force forces the constriction 14 on the collar 10, the outer surface 6 is guiding the cap D. When the U-shaped membrane 22 is oscillated downwardly, as previously explained, the wall 4 of the member is slightly moved inwardly, while the constriction 4 yields to the outside. This facilitates that the constriction 14 easily slide over the collar 10 until the position of Fig. 17 is reached. The collar 10 is then secured by the outer side and the inner side. The contacting wall portions (20 and 20 ') can be squeezed. The collar 4a is seated on the collar 7b or at least is close to the collar 7b. A particular contact pressure is obtained in the region 20 'which results in an additional sealing effect in addition to the sealing effect obtained by the joint action between the securing tear 1 and the collar 10, and between the wall 4 of the outer member and portion 7a of the inner receptacle wall. In Fig. 17, the rigid dome structure of the cap D may also force the wall portion 7a of the inner receptacle into a relationship parallel to the wall 4 of the outer member, resulting in a high retention force, an excellent effect and a portion of the closed CD receptacle.

Additionally, the joint action between the collars 4a, 7b may result in a locking stop which prevents the collar from being deformed too much. The contacting collars 4a, 7b may also maintain the collar 10 and the securing clip 1 in a pre-loaded closure condition, characterized by an action against liquid losses and a high holding force of the cap D. Fig. 18 is a sectional view of the cap D engaged in the single wall receptacle C, similar to Fig. 5. The collar 10 is fully wound inwardly. The securing strap 1 of the cap D is of round cross-section. Areas filled with crossed lines represent zones of strong contact, e.g. slightly uniformly squeezed surface portions. There is a tight contact between the securing tear 1 and the collar 10 along more than 180 ° of the circumference of the collar 10. The wall 4 of the outer member significantly strengthens the upper opening region against radial deformation.

Lisbon, 24 March 2010 24

Claims (27)

Plastic cover (D), in particular for a conical paper or cardboard receptacle (C) having an outer collar (10) in the opening area (9), the lid (D) being provided with a slot (1) ) which is open on the lower surface of the lid to receive the collar (10) therein, the fastening feature (1) being continued at its outer lower end by an elastically expandable constriction (14) and at its inner lower end by a cylindrical or conical outer surface (6) of a wall (4) of the outer member of a recess (V) of the circumferentially extending cap with a substantially U-shaped cross-section with a U-shaped membrane (22) located underneath of the height position of the constriction (14), making a wall (23) of the inner recess member (V) of the cover part of a dome wall of a dome (2) including an upper surface (5) of the dome located neatly (14) and the securing strap (1), characterized in that the recess (V) of the cap is formed with such a depth that it extends sharply downwardly beyond the height position of the constriction (14) by a length which is equal to at least 2.5 times the height of the securing feature and having an outer diameter (D1) on the outer surface (6) and in the height position of the constriction (14). ) so that the recess (V) of the cap defines a centering and guiding projection (K) for an easy engagement operation of the cap (D) on the collar (10) of the receptacle (C), at least while the collar (10) passes beyond the constriction (14) into the securing portion (1), when a locating pressure (R) is directed primarily downwardly into the cup (2), in which there is provided a guiding and centering the cap along the periphery of the outer surface (6). A cover according to claim 1, characterized in that the cup (2) and the recess (V) of the cover usually form a circumferentially continuous articulation mechanism (M) for temporarily opening the securing portion (1) of the cover pulling the wall (4) from the outer member inwardly, said connecting mechanism (R) being operable during the cap engaging operation mainly by the pressure (R) applied on the upper surface (6) of the dome to displace the dome relative to the securing feature (1). A cover as in claim 1, characterized in that the constriction (14) consists of successively deeper and less deep, circumferentially alternating deeper (16a, 16b) depressions formed from the outer side, preferably depressions ( 16a) that are circumferentially larger than the shallow depressions (16b). A lid as in claim 1, characterized by a plurality of protrusions (5a) for distinguishing the upwardly protruding beverages regularly distributed in the upper wall (5) of the cup. A cup-shaped receptacle (C), especially of paper or paperboard, provided with a plastic material-engaging lid (D) according to claims 1-4, said receptacle opening area (9) being ( C) delimited by a wall (7) of the conical receptacle which tapers upwardly and outwardly and by said outwardly projecting collar (10), in particular a curled edge (11), wherein said diameter (D1 ) on the outer surface (6) in the elevation of the constriction (14) is adapted to the inside diameter (D7) of the wall (7) of the receptacle in the collar (10), so that, during the (D), the outer surface (6) of the cover recess (V) functions as said centering and guiding projection (K) of the cover cooperating by a sliding contact with the wall (7) of the receptacle, at least , when the collar (10) moves beyond the constriction (14) towards the inside of the collar (1). A receptacle according to claim 5, characterized in that the cup (2) and the recess (V) of the cap usually comprise a circumferentially continuous articulation mechanism (M) for temporarily opening the securing portion (1) through the moving the wall (4) from the outer member inwardly, while the constriction (14) remains under a pressure (R) on the collar (10). A receptacle according to claim 5, characterized in that the U-shaped membrane (22) is substantially planar and essentially perpendicular to the axis of the cap and in that the wall (23) of the inner member extends substantially parallel to the axis of the cap. 3 A receptacle according to claim 5, characterized in that the centering and guiding projection (K) is formed so as to cooperate through a sliding contact with the wall (7) of the receptacle just before the collar (10) reaches the constriction (14) from the lower side. Receptacle according to claim 5, characterized in that the outer diameter (D1) of the outer surface (6) corresponds, at a level substantially in the position of the height of the constriction (14), to at least the inner diameter (D 7) of the receptacle wall (7) in the opening area (9) and that the conicity angles (a / 2) of the receptacle wall (7) and the conical outer surface (6) are at least approximately equal. A receptacle according to claim 9, characterized in that the outer diameter (D2) of the outer surface (6) is substantially larger than the inner diameter (D7) of the wall (7) in the securing portion (1) of the receptacle in the opening area (9), preferably of approx. 1.5% to 5.0%, preferably of approx. 3.5%. A receptacle according to claim 5, characterized in that the outer surface (6) extends downwardly from the height position of the constriction (14) by a length (Ll) which is at least equal to the length 2.5 times the height (L) of the securing tear (1). Receptacle according to claim 5, characterized in that the outer surface (6) extends downwardly from the height position of the constriction (14) by at least one length (Ll) which is equal to 3 times the inner height (L), preferably even 4 times or more of the height (L) of the fastening tear (1). Receptacle according to claim 5, characterized in that the angle (a / 2) of the taper remains between approx. Preferably between about 6 ° and 12 °, preferably between approx. 8th and 10th. A receptacle according to claim 5, characterized in that the dome (2) has circumferentially distributed depressions (3), preferably four or eight regularly distributed depressions (3) of identical size and of the same depth, at the transition between the upper wall (5) of the dome and the wall (23) of the inner member extending upwardly. A receptacle according to claim 14, characterized in that each depression (3) defines an indentation for finger gripping cut in the wall (23) of the inner member. A receptacle according to claim 14, characterized in that each depression (3) is formed with a lower collar (3a) defining a capping stopper. Receptacle according to claim 5, characterized in that at least one band-like circumferential region (30) is provided on the outer surface (6) of said wall (4) of the outer member and / or the wall (7) ), said zone (30) having an increased coefficient of friction compared to the vicinity of said zone (30). 5 Receptacle according to claim 5, characterized in that the radial thickness (Y) of the collar (10) exceeds the radial inner width (Y1) of the securing portion (1). A receptacle according to claim 18, characterized in that the radial thickness (Y) of the collar (10) exceeds the average radial inner width (Y1) of the fastening tear (1) by approx. 10% to 20%, preferably in approx. 15%. A receptacle according to claim 18, characterized in that the radially inner width (Y1) of the securing portion (1) decreases in a direction opposite the engaging direction from the constriction (14) onwards. A receptacle (C, CD) according to one of claims 5-20, wherein the projection (K) for centering and guiding the cap and the engaged retaining strap (1) usually define a reinforcing structure of the area of the annular receptacle to prevent radial deformations of opening of the receptacle. Cover according to one of Claims 1 to 4, characterized in that a penetration region (25) of predetermined size is formed in the top wall (5) of the dome, the penetration region (25) having a thickness (xl) having a thinner wall than at least the thickness (x) of the top wall of the dome and in that the penetration region (25) is formed by crossed fluted lines (26) for introduction of a straw. 6 Cover according to claim 22, characterized in that the penetration region (25) is provided with a thin-walled bottom of a recess (24) formed in the upper wall (5) of the dome, the bottom of the top wall (5) of the dome and the thin wall thickness (xl) of the bottom wall being effected by local compression of the material. Cap according to claim 22, characterized in that the penetration region (25) is curved in a direction towards the inside of the dome (2). A cover according to claim 23, characterized in that the recess (23) is located essentially in the center of the upper wall (5) of the dome, in that the recess (24) has a recess wall contour substantially corresponding to two ellipses which main axes are offset relative to each other by 90 ° and in that said striated lines (26) extend along the main crossed axes of the ellipses. Plastic cover (D), especially for a paper or double-walled carton container (CD) having an outer collar (10) in a conical and staggered opening area (9a), the lid (D) provided with a peripheral fastening groove (1) which is open on the lower surface of the lid to receive the collar (10), the fastening groove (1) being continued at its outer lower end by an elastically expandable constriction (14) and its inner lower end by a cylindrical or conical outer surface (6) of a wall (4) of the outer member of a circumferentially extending cover (V) of substantially transverse cross-section with a membrane (22) in a U located below the height position of the constriction (14), making a wall (23) of the inner recess member (V) of the cover part of a dome wall f of a dome (2) including a wall ) of the top which is located substantially above the height positions of the constriction (14) and the securing strap (1), characterized in that the recess (V) of the cap is formed with such a depth, which extends downwardly from the position (14) and with an outside diameter (D1) on the outer surface (6) in the height position of the constriction (14), so that the recess (V) of the cap defines a centering projection (K) and (9a) of the double-walled receptacle (CD) allowing for easy engagement of the lid (D) on the collar (10), wherein a centering and a (6), and wherein the centering and guiding projection (K) is continued downwardly by an inwardly spaced portion (4a, 4b, 6a), dimensioned for a joint pressing action with the region of the wall (7) of the receptacle located below the tapering and stepped opening area (9a). Cover according to claim 25, characterized in that the outer surface (6) of the wall (4) of the outer member is formed with a value of taper angle between 0 and 8 a value smaller than the angle value of (9a) of the stepped receptacle opening. Lisbon, March 24, 2010 9 1/9 FIG 2 PG 3 r 6 F \ Q 1 I 2/9 3/9 - / P / G5 4/9 5/9 6/9 7/9 8/9 FIG16 D CD 7b 9/9