PL186632B1 - Recloseable lid for beverage can - Google Patents

Abstract

The invention concerns a lid for sealing a sheet metal drinks can, a sealing element (102) being associated with this lid. Within its surface, the lid comprises a breakable region which is delimited by a notched line (103) and is surrounded by a cylindrical central wall (106) of a central enclosure (W). The sealing element comprises a corresponding cylindrical part (112) which engages in the central wall. Engagement and counter-engagement elements (115, 109), which co-operate in the manner of a bayonnet closure, are provided at the base of the cylindrical walls. Pressure elements and pressure surfaces (117, 116), which are designed and arranged such that when the sealing element is rotated relative to the lid, the notched line is made to break open (104) and the pouring aperture is released, are further provided at the base of the sealing element and at the base of the lid surface (111), these pressure elements and pressure surfaces co-operating with one another in the axial direction. An edge flange (139) of the sealing element is urged sealingly with appropriate pre-stress onto an annular surface (107) at the upper end of the central enclosure (W) of the lid by rotation.

Description

The subject of the invention is a closable lid for a beverage can, in particular of sheet metal.

Such types of beverage cans with a lid are available in various designs on the market. There are embodiments in which the cut-out filling opening is provided with a breakaway closure located in the flat top part of the lid, i.e. in the so-called lid mirror. In other embodiments, the lid mirror has a press-fit area surrounded by a score or notch line that is torn off the lid or pressed on by a lever grip tab to open the pour opening. The depressed area can be made completely detachable from the mirror of the lid or permanently connected thereto and remain there.

The problem with such beverage cans is that if the contents are not emptied in one go, they cannot be resealed with a satisfactory seal. However, it would be desirable if the content is to be withdrawn in portions and at intervals without any significant loss of quality.

The object of the invention is to provide a lid for commonly used beverage cans which will allow, after a certain portion of the beverage has been initially removed, a sufficiently tight reseal of the can so that after a certain time and without any apparent loss of the quality of the beverage, another portion or the remainder can be withdrawn.

A closable lid for a beverage can, in particular of sheet metal, with a metal mirror of the lid and a surrounding substantially cylindrical wall, and a metal rim of the lid for connection to the rim of the beverage can and an exposed spout opening in the lid mirror, the spout opening defined is delimited by a notch or cut line through the breakout area of the lid mirror, according to the invention it is characterized in that it has a closing element with a flat bottom above the lid mirror, sealingly closing the pour opening, the closing element at its bottom having means for initially breaking the notch line or incision and for the original opening of the pour opening by rotation, and furthermore, the closing element with at least one catch element arranged at the wall is outside the catch to reveal the pour opening or in a shaped pivoting catch to seal the pour opening.

In the lid according to the invention, the catch element and at least one cooperating catch element, respectively arranged on the closing element, constitute bayonet connection elements.

The closing element is an element of a rigid material, in particular metal.

As a catch element, the wall has an annular groove or groove open towards the axis of the cover, and furthermore has at least two channels extending in the axis direction, open towards the axis of the cover and spaced apart in the circumferential direction for axial insertion and subsequent pivoting locking. the closing element.

The closure element has a stiffened peripheral area, which, in closed condition with axial stress, is adjacent to the upper edge of the wall from the outside to a rounded crest of the shaft surrounding the pouring opening.

Preferably, the substantially cylindrical wall is a core wall.

The closing element has a cylindrical wall area at its stiffened edge, in which the cooperating catch elements are located, and the wall area ends with the closing bottom, while at least one axially protruding pressure element is located at the lid mirror or at the closing bottom, and at the closing bottom or at the mirror of the cover, at least one pressure surface rising in the circumferential direction is arranged, which are positioned with respect to each other in such a way that when the cover is rotated relative to the closing element, the pressure element, by sliding over the pressure surface, breaks a score line or notch for opening the pour opening.

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The lid mirror has a breakout area permanently connected by an articulation line formed by breaking the score line or notch to the rest of the lid mirror and, when pressed, deviates below the lid mirror plane.

It has a plurality of pressure elements and pressure surfaces, which are always arranged in pairs substantially diametrically opposite each other or over an angle of approximately 120 °, one of these elements or surfaces being shifted by an insertion angle of between 10 ° and 30 ° relative to position 120. °.

The part having the rising pressure surface has a recess at the end of each pressure surface for receiving a pressure member of the other part before breaking a score line or notch.

In the unlocked state of the cover, the closing element has a free axial distance between the edge area and the cooperating catch element, this distance being smaller than the free axial distance between the upper wall end and the catch element extending in the wall.

The wall is the inner wall of the annular shaft surrounding the convex pour opening, the shaft being formed by two spaced metal layers and a ridge connecting them.

The annular shaft has a diameter that is slightly larger than the pour opening, but distinctly to a much smaller diameter than the rim of the lid.

Within the annular shaft, all catch elements for the closing element are arranged.

The catch elements include axially oriented tracks guiding circumferentially oriented locking elements.

The closure element is unfilled inside between its cylindrical wall area and is open at the top.

At the bottom of the closing element, three spaced circumferential annular groove segments are arranged as the closing element, whereby a raised lug is always located between them as a pressure element, in particular of a point-shaped shape, and the mirror has three cooperating arched recesses, each for seating one from the toecap.

In the lid mirror in extension but offset with respect to the arcuate depressions, there is a raised control nose for the far directed deflection of the breakout section upon contact with one of the rising nose pieces, both noses rising on top of each other towards each other.

The articulation line of the mirror portion of the lid to break away is positioned close to the end of the arcuate recess having the lowest point there, in order to obtain a greater flattening than the pressure area or pressure line in the direction of rotation guided in the arcuate recess of the nose of the closure element bottom.

All the arcuate depressions along their circumferential course have an ascending form.

The control nose is positioned close to the articulation line in order to cooperate with one of the lugs constituting the pressure element during the rotation of the closing element after the breakout section has been broken, for the breakout section to be significantly deflected below the cover mirror plane.

The lid according to the invention is preferably designed such that the pouring opening is opened only after a score line or a notch has been broken.

All the reopening means of the lid are positioned within the periphery of the lid ("shaft") so that the lid can be used to close common cans. Due to the relative rotation of the closure element and the cover, and thus the releasable catch elements or the cooperating catch elements on the outer side of the shaft and on the outer side of the closure element introduced into or from the catch, a sufficiently high closing force necessary to reseal the opening can be obtained.

186 632 pouring. Hooking elements or counter-engagement elements in the form of a bayonet connection are particularly suitable for this.

The closing element, which acts as a stopper or stopper, can be, like a lid, made of metal. However, it can also be made of another rigid material.

A lid with the features according to the invention achieves particularly high closing forces and thus a particularly reliable sealing effect when the opening is closed again. The wetted area of the inner wall of the shaft during reclosing can be completely covered by the closure element, the stiffened edge area surrounding the element which abuts the upper periphery of the shaft under tensile stress.

In particular, the lid according to the invention is a lid in which the pour opening is only opened by breaking a score line or a notch. In this case, the relative rotational movement of bayonet engaging engaging elements and cooperating engaging elements is used for controlled fracture and opening of the opening. The breakout sequence requires only a small amount of force, since a considerable force increase is achieved by the pivoting movement and by the form-fit catch of the parts rotated relative to each other.

The arrangement of the always one pressure element on the underside of the closing element and the pressure surface associated with it on the mirror of the cover transmits small torques as large axial pressure forces to the score or notch line causing them to break.

The number of pressure elements and pressure surfaces may vary, but it is envisaged to use at least two pairs of elements thus juxtaposed. Preferably, there are three pressure elements and pressure surfaces facing each other, which are then arranged in pairs opposite each other at an angular spacing of 120 ° (± 30 °) on the lower side of the closure member and on the upper steep mirrors of the lid. If segments in the form of annular grooves with an ascending bottom are arranged in the cover mirror, corresponding point lugs at the bottom of the closing element are guided in these segmented grooves, while the rotation of the closing element produces constantly greater breaking forces acting on on the broken mirror section of the lid. In the rest position (not open position), the lugs of the closing element are located in the deepest areas of the annular segments.

When inserting the closure cap into an annular shaft, the inner wall of which is the core wall, no breakage should yet arise, therefore, in the opening direction, no breakage is to be formed between the axially oriented insertion channels for the catch elements on the cylindrical wall of the closure element and the first segment of the annular groove. the aperture-inducing pressure elements or cooperating elements, rather when produced by post-forming the tabs on the bottom of the closure element, it is ensured that an initial small insertion angle can occur to lock the closure element on the lid without having a breaking action on the breakaway section. To this end, the breaking lugs on the bottom of the closing element are formed in such a way that only after the element has been inserted and locked in the lid mirror, each of these lugs fits into the corresponding lowest point of the annular segment, which is preferably done after said control lug on the lid mirror .

In a simplified embodiment, an annular groove is provided in the bottom of the closure element which extends along the entire circumference and directed opposite to the lid mirror, so that it is possible to insert and initially rotate by the locking angle sigma (ci) and only then the breaking lugs in the lid mirror are appropriately positioned in the circumferential a groove at the bottom of the closure element, but they do not yet act as they extend into the recesses in the segmental annular grooves.

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The subject matter of the invention is shown in an embodiment in the drawing, in which fig. 1 shows, in a perspective and separated position, shown in cross section, a first embodiment of a lid with a closing element 102, fig. 2 - a different embodiment of the lid of fig. 1 of fig. another closure element 125, Fig. 3 - a section of the cover of Fig. 2 when breaking a score line or a notch in the cover mirror 111, i.e. in the flat top part of the cover, Fig. 4 - view of the cover of Fig. 1 without the associated member 5 - an example of a lid with more than two, here with three arcuate recesses 117a, 117b, 117c distributed evenly over the wall area 106 in an inclined manner, Fig. 6 - a closing element 125 corresponding to Fig. 5 with also three circumferentially spaced longitudinal grooves with point lugs 151a, 151b, 151c placed between them for insertion into arched recesses 117 according to 5 and Fig. 7 shows the assembled state, that is, after the closure element 125 has been inserted into the core wall 106 of the lid of Fig. 5, the closure state being shown in which the lug 151, on the closure side, abuts the lowest arch point. recesses 117b on the lid side directly or close to pivot 140.

The lid 101 is preferably made of sheet metal. It has an edge area 101r which is usually firmly connected to the edge of a known beverage can. The lid has a circular flat top, a so-called lid mirror 111, surrounded by a cylindrical wall 106, a so-called core wall. The mirror 111 has an area to be broken and delimited in the example shown by a circular incision or notch 103. At the bottom of the wall 106 is a groove-catch 109 open towards the cover axis (inward) having a rather considerable radial depth. Adjacent to wall 106 at the upper end is a lid rounding forming a ridge 107. The core wall, the ridge of the lid and the outer wall 106a close to wall 106 form a kind of upwardly rising shaft around the pour opening. Its diameter is small compared to that of the bottom rim, its inner diameter, i.e. the diameter of the inner core wall, being slightly larger than the diameter of the mirror 111 of the cover used to break 105.

In defined and limited areas of its circumference, the core wall 106 has channels or recesses 108 open in the axis direction and extending parallel to the lid axis. They are open towards the upper rounding of the lid 101 and towards the grooves of the catch elements 109, i.e. always in the axial direction.

In the flat top mirror portion 111, the lids have limited, arcuate recesses (or grooves) 117 on their periphery, which at one of their ends have pressure surfaces 118 inclined towards the mirror top 111.

The lid includes a closing element 102 which is made of a relatively stiff material, in particular sheet metal, but could also be made of another material, for example plastic. The closure element has a cylindrical wall 112 corresponding to the core wall 106, with an outwardly projecting peripheral flange 113 radially adjacent to the outside wall 112, the edge of which is stiffened with an hem 114. At the base of the cylindrical wall 112, ribs 115 protruding radially outwards are arranged along the circumference. In addition, the closure 102 has a bottom (or flat portion) 110 in which protruding pressure elements 116 are embossed downwardly. The radial dimensions, circumferential length, number and mutual distance of the ribs 115 correspond to the radial depth, circumferential size, number and spacing of the channel recesses. guide tracks 108 in the cover wall 106.

It can be seen that the circumferential groove 109 and the co-operating rib-shaped detent 115 form a kind of bayonet connection. As indicated by arrow 119, the closure member 102 is pressed into the lid 101 in the indicated position relative to the lid until the ribs 115 are in the plane of the groove 109. Due to the rotation of the closure member 102 with respect to the lid 101, these parts engage positively with each other.

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The distance 122 between the rib 115 and the circumferential flange 113 of the closure element 102 is smaller than the gap 123 between the rounded ridge 107 and the active (upper) edge of the groove 109, so that in the locked state the circumferential flange 113 abuts the radius of the cover 107 with pressure, thereby creating a reliable sealing the space surrounded by the wall 106.

It can be seen that the lid 101 with the closure member 102 performs functions that may be used in the case of a sealed reclosure of the pour opening, the pour opening being cut into the top flat portion of the lid during manufacture, and thus need not be therein. broken off, in initial use.

However, it is preferable to use a lid as shown. When, according to arrow 119, the closure member 102 is pressed into the lid and the two parts are pivoted a little in a direction so that there is a slight locking, the pressure plate 116 fits into the arcuate recess 117, and the pressure piece 116 does not exert pressure. a significant pressure on the flat, top part of the lid, i.e. the lid mirror. However, if the closure member 102 is rotated 180 ° with respect to the lid 101, the pressure members 116 run over the oblique pressure surfaces located on the lid mirror and in continuation of the arcuate grooves-recesses 117 and exert an increasing axial pressure on the lid mirror. This pressure is sufficient to break the notch line 103, whereby the rotation and action of the lugs of the pressure elements 116 at the end of the rotation by 180 ° tilts the area to be broken almost completely in the y direction towards the inside of the can. To this end, as will be explained later, the notch line has a break acting as a pivot line 140.

The number of pressure elements 116 and pressure surfaces 118 may vary, in particular, two such elements and two surfaces are envisaged (at least). They can be used in pairs. The same applies to the bayonet interlocking elements 115 with the associated channels 108 in the core wall 106.

It is not necessary for the notch 103 to extend coaxially to the wall 106.

In the embodiment shown in Fig. 2, the lid 101 is made in the same manner as the embodiment of Fig. 1. The closure member 125 differs from the closure member 102 in a different design of the circumferential flange 134, 139 and its stiffening. The closure element 125 at the bottom of its cylindrical wall 138 has at least two radially outwardly projecting ribs 135 constituting cooperating catch elements. Adjacent to the upper end of the cylindrical wall 138 is a flat circumferential flange 139 which curves outward slightly downwards and then folds upwards and inwards 134. The bottom 136 includes at least one pressure element 137 in the form of an arcuate rib.

The method of operation of the embodiment shown in figure 2 is in practice identical to that of the embodiment of figure 1.

Figure 3 shows the start of the break-out sequence after rotation through the angle α (alpha) of the closure element with respect to the lid 101, the angle a being 90 [deg.] To the position in Fig. 2 at which the closure element is inserted. Here it can be seen that the pressure piece 137 slides, through the sloping pressure surface 118, onto the lid mirror 111, this top portion being broken off along the notch line. The region 105 broken from the top portion of the lid 101 is visible and the resulting spout is indicated by 104.

Fig. 4 shows a possible association of the channels 108 and 108 'and the recesses 117 and 117' with the adjacent pressure surface 118 and 118 '. Furthermore, bent ends of the broken line of the notch 103 are visible at the point 103a, whereby a connection between the breakable area 105 and the lid mirror 111 remains in the gray 140, which joint serves simultaneously as an articulation line for breaking off and deflecting area 105.

186 632

It will be appreciated by a person skilled in the art that the bayonet coupling elements and the elements cooperating with them in both parts 101 and 102 or 125 can be interchanged with each other. The same is true of the pressure elements 116,137 and the pressure surface 118.

Fig. 5 shows a top view of the mirror, the lids of Fig. 4. There are three arcuate recesses 117a, 117b, 117c which, starting from a deeper position, rise to the mirror plane 111 of the cover 101 and form pressure surfaces 118 (a , b, c). The guide channels 108, 108 'are shown as in Fig. 4, only offset by 90 °. 5, an arcuate recess 117b is no longer provided directly at the insertion channel 108, but shifted accordingly when two channels are provided symmetrically along the periphery of the wall 106 and three arched recesses 117 are provided in the mirror 111 of the cover 101 on the periphery of the core wall 106. arranged around the perimeter.

More than three curved depressions can also be made.

Three such elements constitute the optimum in terms of operation and input.

6 shows a closure 125 with an arrangement of pressure elements 116 in the form of pressure lugs 151a, 151b, 151c, and a circumferential groove 116a, 116b, 116c is provided between these lugs.

Fig. 7 shows an assembled state in plan view, each pressure lug 151 abutting its arcuate recess 117 in the cover mirror 111. The circumferential flange of the cover is not shown here, but the rotation of the ribs 135, 135 is shown, which first through the guide channels 108, 108 'are seated in the axial direction and then rotated through an angle of approximately 45 °.

Starting from the closed position of Fig. 7, it is possible to break off (direction of rotation + α), or open from closed state (direction of rotation -α) to withdraw the contents of the can after removing the plug 125.

The state shown in Fig. 7 is a closed state in which no action is taken by the noses 151a, 151b, 151c. This state of the closure is obtained not directly by mounting the closure according to Fig. 6 in the lid of Fig. 5, but by mounting the closure 125 of Fig. 3 without embossed breakout lugs 151a, 151b, 151c, and provided only with a circumferential annular groove 116a. 116b, 116c. There is then no collision with the control nose 150 of Fig. 7 and Fig. 5 which is used to extend the deflection path. Only after insertion of a closure provided with a groove 116a, 116b, 116c directed only upwards (distant from the mirror of the lid 111), the lugs 151 a, 151b, 151c are shaped by the inversion direction of the formation of the said groove so that they adjoin the recesses 117a, 117b, 117c always at the lowest point, which in the case of the breakout tongue 151a is directly behind the control tongue 150. The marked angle σ (sigma) is about 30 ° and corresponds to the rotation of the closure element 125 in the shaft W, which in Figs. 6, 7, 5 is not closer to shown in order to lock the closure element 125 against the core wall 106 of the shaft W. A recess 117b and the associated tongue 151a are then arranged around this angle, due to the generally symmetry of the angle of 120 ° for the three arranged pressure lug / inclined surface arrangements, so that an arrangement is obtained of only about 120 °.

Starting from Fig. 7, when the closure member 125 has been turned in the + direction, this is a breakout action over an angle of approximately 60 ° in the series of oblique grooves 117a, 117b, 117c. Then the closure member is pivoted further through an angle of about 150 ° until the nose 151c meets the control nose 150 on the flat surface of the lid to give the broken section a large pivot angle with a short rotation that corresponds to half the width of the nose 150 / 151c. For this rotational movement, no great force is needed, so that a small rotational angle is sufficient. The cooperation of the aforementioned pair of lugs 150 / 151c still takes place at this time. wherein the locking rib 135 and its opposite analagon 135 'are locked in the wall 106 so that there is resistance to the force generated by rotation.

The lid for closing the soda can is made of a metal sheet and the lid has a closure member 102.

186 632

The lid in its top flat portion has an area to be broken limited by a notch line 103, which is surrounded by the cylindrical core wall 106 of the shaft W formed around this area. The closure member has a corresponding cylindrical portion 112 for projecting into the core wall. At the base of the cylindrical walls there is a catch element and a cooperating element 115, 109 forming a kind of bayonet connection. Furthermore, pressure elements or pressure surfaces 117, 116 which cooperate in an axial direction are arranged at the bottom of the closing element and at the bottom of the mirror 111 of the lid 101, which are designed and arranged in such a way that when the closing element is rotated relative to the lid, a notch line 104 is broken. and opening the pour opening. Due to the rotation, the circumferential flange 139 of the closing element is pressed against the annular rounded surface 107 at the upper end of the shaft into the lids with suitable pressure.

The maximum force to initiate the breakout movement is obtained when the lowermost portion of the segment in the form of an annular groove is located close to or directly opposite the pivot point formed between the breakout region of the lid mirror and the rest of the mirror, i.e. outside the ring segments but within the core wall.

A raised control nose may be placed in the lid mirror between segmented annular grooves to obtain a large swing angle of the opening area with a rotational movement. In an annular groove at the bottom of the closure element, breaking lugs are arranged circumferentially over a large angle to form segments of the annular groove and raised breaking lugs arranged therein. If all the lugs in the bottom of the closure element have the same height towards the lid mirror, and the ring segments in the lid mirror always have the same ascending sequence, the opening shear force arising from the rotational movement of the closure cap is exerted at angular intervals on the broken-off portion of the lid mirror so that it breaks reliably along the notch line.

The previously described reliable breaking effect of the notch is achieved with a predetermined angle of rotation that corresponds to the length of the annular groove segments in the lid mirror. The defined rotational movement with a slight axial displacement of the breakout section in the lid mirror produces a high opening force, the lugs at the bottom of the closure element cooperating with the elevation of the annular segments in the lid mirror. After the break-out, no large axial forces occur, and instead the broken-off area of the hole should be deflected to a large angle downwards (below the plane of the lid mirror) in order to fully open the pour-out hole. This is achieved when said additional control lug in the lid mirror facing outwards cooperates with a breakout lug on the bottom of the closure element, which lug points downwards. If the control nose in the lid mirror is placed close to the articulation, then the cooperation of the nose pieces formed in opposite directions (control nose and breaking nose) may result in obtaining a wide angle of deflection at a small angle of rotation. The opening movement is thus divided into a circumferentially strong rotational movement with an axially small fracture action and a circumferentially short path with overlapping or contact of said pair of lugs for pronounced deflection with a significant axial path for opening the opening.

186 632

138

Κ -— 136

106

103

138

135

136

109-

rn yi37

CC = 90 °

104 105 * 1 * • 4 #

186 632

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113

102

Publishing Department of the UP RP. Mintage 50 copies. Price PLN 4.00.

Claims (21)

Patent claims 1. A closable lid for a beverage can, in particular of sheet metal, with a metal mirror of the lid and a surrounding substantially cylindrical wall and a metal rim of the lid for connection to the rim of the beverage can and an exposed pour opening in the mirror of the lid, said opening the spout is defined by a breakable area of the lid mirror delimited by a notch or indent line, characterized in that it has a closure member (102, 125) with a flat bottom (136) above the lid mirror (111) sealingly closing the pour opening (104), the the closure (102, 125) at its bottom (136, 110) has elements (137, 117; 151a, 151b, 151c, 117a, 117b, 117c) for initially breaking the notch line or notch (103) and for initially opening the pouring opening (104) by rotation and further a closure member (102, 125) with at least one detent member (109) positioned against the wall (106) disposed outside the detent to expose the pour opening it (104) or is located in a form-fit pivot (115, 135, 108, 108 ', 109, a) to seal the pour-out opening (104). 2. The lid according to claim 1 The mating catch element (115, 135) as claimed in claim 1, characterized in that the catch element (109) and the at least one mating catch element (115, 135) respectively disposed at the closing element (102, 125) are bayonet connection elements. 3. The lid according to claim A method as claimed in claim 1 or 2, characterized in that the closing element (102, 125) is an element of a rigid material, in particular of metal. 4. The lid according to claim 1 The wall (106), as a catch element (109), has an annular groove or groove open towards the axis of the cover (109) and furthermore has at least two channels (108, 108 ') extending in the direction of the axis and open towards the axis of the cover. and spaced in a circumferential direction for an axially directed insertion and for the subsequent pivoting locking (a) of the closing element (102, 125). 5. The lid according to claim 1 4. The closure element as claimed in claim 4, characterized in that the closure element (102) has a stiffened peripheral area (113, 114, 134, 139) enclosed in an axially stressed closed state, abutting from the outside to the upper edge of the wall (106) a rounded crest (107) of the shaft (106, 107 W) surrounding the pour opening (104). 6. The lid according to claim 1 The method of claim 1, wherein the substantially cylindrical wall (106) is the core wall. 7. The lid according to claim 1 The closure element according to claim 1, characterized in that the closure element (102, 125) at its stiffened edge (113, 114) has a cylindrical wall area (112) in which cooperating catch elements (115, 135) are located and the wall area ends with a closure bottom. (110, 136), while at the lid mirror (111) or at the closing bottom (110, 136) at least one axially protruding pressure element (116, 137) is arranged, and at the closing bottom (110, 136) or at the lid mirror (111) there is at least one pressure surface rising in the circumferential direction (118; 117, 117a, 117b; 118, 117 ', 118', 118b) so that when the cover (101) is rotated relative to the closing element (102, 125), the pressure element, by sliding over the pressure surface, breaks a score line or notch (103) for opening the pour opening. 8. The lid according to claim 1 A device according to claim 1, characterized in that the lid mirror (111) has a breakout area (105) permanently connected by an articulation line (140) formed by breaking the score line or notch (103), moreover the lid mirror (111), and when pressed, it folds below the mirror plane (111) of the cover. 9. The lid according to claim 1 7. A pressure block according to claim 7, characterized in that it has a plurality of pressure elements and pressure surfaces, which are always arranged in pairs substantially diametrically opposite each other or over an angle of approximately 120 °, one of the pressure elements being Or surface is shifted by a lead-in angle (<) of between 10 ° and 30 °, relative to the 120 ° position. 10. The lid according to claim 1 The pressure plate of claim 7, characterized in that the portion (111, 110) having a rising pressure surface (118) has a recess (117) at the end of each pressure surface (118) for receiving a pressure member (116) of the other portion (110, 111). before breaking a score or notch line (103). 11. The lid according to claim 1 The closure element as claimed in claim 1, characterized in that, in the lid unlocked condition, the closure element (102, 125) has a free axial distance (122) between the edge region (113, 139) and the associated catch element (115, 135), the distance being smaller than a free axial distance (123) between the upper end of the wall (106) and the detent element (109) extending in the wall (106). 12. The lid of claim 1; The wall (106) as claimed in claim 1, characterized in that the wall (106) is the inner wall of the annular shaft (W) surrounding the convex pouring opening (104), the shaft (W) being formed by two spaced sheet metal layers (106, 106a) and a connecting ridge (107). ). 13. The lid of claim 1; 12. The apparatus of claim 12, characterized in that the annular shaft (W) has a diameter slightly larger than the pouring opening (104) but clearly down to significantly smaller than the rim diameter (10lr) of the cover (101). 14. The lid of claim 1; Arrangement according to claim 12 or 13, characterized in that all catch elements (108,109,115; 135,108,109) for the closing element (102; 125) are disposed within the annular shaft (W). 15. The lid of claim 1; 14. The detent element as claimed in claim 14, characterized in that the catch elements include axially oriented guide tracks (108, 108 ') and circumferentially (a) oriented locking elements. 16. The lid of claim 1; The closure element according to claim 1 or 7, characterized in that the closure element is unfilled inside between its cylindrical wall area (112, 138) and is open at the top. 17. The lid of claim 1; Arrangement according to claim 1 or 7, characterized in that three circumferential annular groove segments (116a, 116b, 116c) are arranged at the bottom (110, 136) of the closure element (102, 125) as a closure element, always interposed therebetween. there is a raised lug (151a, 151b, 151c) as a pressure element, especially point-shaped, and the mirror (111) has three co-operating arcuate recesses (117a, 117b, 117c) to seat one of the lugs each time. 18. The lid of claim 1; 17, characterized in that in the lid mirror (111) in extension but offset with respect to the arcuate depressions, there is an elevated control nose (150) for the far directed deflection of the breakout section (105) upon contact with one of the rising lugs (151c) both lugs (151c, 150) rise on top of each other towards each other. 19. The lid of claim 1 The method of claim 8, characterized in that the articulation line (140) of the cap break portion (105) of the mirror (111) is located close to the end of the arcuate recess having the lowest point there, to obtain a greater flattening than the pressure surface or pressure line (118b) in the direction of a rotational movement (a) conducted in the arcuate recess (117b) of the tongue (151a) of the bottom (136) of the closure element. 20. The lid of claim 1 19, characterized in that all the arcuate depressions have an ascending form along their circumferential course. 21. The lid of claim 1; 17, characterized in that the control lug (150) is disposed adjacent to the articulation line (140) for interaction with one of the lugs constituting the pressure element during the rotational movement (a) of the closure element (102, 125) after the breakout section (105) has been broken off. ), for the breakout section (105) to deviate significantly below the mirror plane (111) of the lid. * * * 186 632