Lid for a cup

Abstract

The present invention relates to a lid for a container. The lid is intended to be stackable in such a way that the stack exhibits a relatively high resistance to axial loading without the lids becoming wedged inside one another, while at the same time the lid is relatively easy to produce. A lid (100, 300, 500, 700) is proposed, comprising a central portion (110, 310, 510, 710) and a domed portion (120, 320, 520, 720). The central portion (110, ...) defines a central plane (ZE1, ZE3, ZE5, ZE7). The domed portion (120, ...) has an inner side (124, 324, 524, 724), a top side (126, 326, 526, 726), and an outer side (127, 327, 527, 727). The inner side (124, ...) of the domed portion (120, ...) has a first portion (122, 322, 522, 722), a first angle (α11, α13, α15, α17) being formed between the first portion (122, ...) and the central plane. The inner side (124, ...) of the domed portion (120, ...) has a second portion (123, 323, 523, 723), a second angle (α21, α23, α25, α27) being formed between the second portion (123, ...) and the central plane. The value of the first angle (α11, ...) differs from the value of the second angle (α21, ...).

Description

[0001] Lid for a cup

[0002] Description

[0003] The invention relates to a lid for a container. Specifically, the invention relates to a thermoformed (deep-drawn) plastic lid for a cup in which, for example, spreadable fat can be stored.

[0004] These lids are manufactured in large quantities and often supplied to bottlers along with matching cups. For transport and storage, the lids are stacked. An axial load on the stack can cause lids to jam together, making it difficult to remove individual lids. Therefore, it is desirable for the lids to be designed so that a stack of lids can withstand a relatively high axial load without the lids jamming together. The axial load on a stack of lids is also referred to as stacking compressive force.

[0005] To ensure sufficient resistance of a stack of lids to axial loads without the lids jamming, lids are designed, among other things, with a circumferential mandrel in the edge region of the lid surface. One side wall of the mandrel can be inclined such that a section of the lid surface of a first lid rests on a section of the mandrel of a second lid when the lids are stacked. Such an inclined side wall of a mandrel forms an undercut, which makes demolding the lid (forced demolding) more difficult.

[0006] One object of the invention is to provide a lid that is stackable in such a way that the stack exhibits relatively high resistance to axial load without the lids jamming together, and that the lid is simultaneously relatively easy to manufacture. A further object is to avoid the need for a complex machine for manufacturing the lid. A still further object is to enable high-volume lid production per unit of time. Furthermore, a stack of lids should be relatively easy to handle during packing, transport, and feeding into the filling system.

[0007] The object is further accomplished by a lid according to claim 1, 22 or 23, which can be inserted into a container according to claim 25. A lid according to claim 1, 22 or 23 can be manufactured by the method according to claim 26.

[0008] A lid for a container comprises a central section and a mandrel. The central section can define a central plane. The mandrel has an inner, a top, and an outer surface. The inner surface of the mandrel has a first section. Between the first section of the mandrel and the central section or the central plane, a first angle all, al3, al5, al7 (hereinafter also referred to as all) is formed. The inner surface of the mandrel has a second section. Between the second section of the mandrel and the central section or the central plane, a second angle a21, a23, a25, a27 (hereinafter also referred to as a21) is formed. The value of the first angle all and the value of the second angle a21 are different.

[0009] By designing the inside of the dome with varying inclinations, for example relative to the axis (axial direction) of the lid, a relatively high resistance of a stack of identical lids to axial load is achieved without the lids jamming together. At the same time, relatively easy demolding of the lid, e.g., during thermoforming (deep drawing), is ensured.

[0010] The central section of the lid can be the lid's surface. The central section, or lid surface, can be a section of the lid that extends flat (in a plane). For example, the central section has a flat extent of at least 1,000 mm. 2 or 2,000 mm 2 .

[0011] The central plane can be positioned such that at least a large part (more than 50%) of the central section or the top surface lies in the plane. The central section or the top surface can lie entirely in the central plane.

[0012] The mandrel can circumvent the central section at least partially. The mandrel can circumvent the central section completely.

[0013] The mandrel can be located axially above the central section. The mandrel and the central section can also be located, at least partially, in the same plane.

[0014] The pin can have an essentially circular shape (e.g., in the case of a round lid). Alternatively, the pin can be shaped to enclose an essentially rectangular surface (e.g., in the case of a rectangular lid), specifically a rectangular surface with rounded corners.

[0015] The inner side of the dome can be the side of the dome facing the central section. The outer side of the dome can be the side of the dome facing away from the central section. Angles all and a21 can be formed between sections of the inner side of the dome and the central plane. Angles all and a21 can also be formed between sections of the inner side of the dome and the central section. Angles all and a21 can also be formed between sections of the inner side of the dome and a step between the central section and the inner side of the dome.

[0016] The inside of the cathedral can transition into (overflow with) the central section.

[0017] The lid can be single-piece.

[0018] The lid may be made of or comprise a plastic material. The plastic may be selected from the following group: polypropylene, polystyrene, polyethylene terephthalate, polyethylene, and a biodegradable plastic (biodegradable according to DIN EN 13432), or a mixture thereof.

[0019] In particular, the plastic includes polypropylene or consists of polypropylene.

[0020] The lid can be thermoformed or deep-drawn. It can also be injection-molded.

[0021] The lid can have a (substantially) circular base shape or a circular-like base shape. The lid can have a (substantially) rectangular base shape or a rectangular base shape with rounded corners.

[0022] The lid can have a (essentially) polygonal basic shape, in particular with rounded corners. The lid can have an (essentially) n-sided basic shape, where n (an integer) is a value from 3 to 10; specifically, the corners are rounded.

[0023] The lid can have a (essentially) oval basic shape.

[0024] The lid can have any basic shape.

[0025] The lid may have a tab.

[0026] The lid can have a maximum outer diameter of 200 mm or 180 mm, preferably 140 mm.

[0027] Preferably, the maximum outer diameter of the lid is at least 50 mm or at least 100 mm. The lid can have a maximum height of 40 mm or 20 mm, in particular 15 mm.

[0028] The inner surface of the mandrel can have several first sections and several second sections. For example, at least three or five sections of each. The sections can be arranged alternately along the mandrel (in a circumferential direction).

[0029] Preferably, the sections are arranged regularly alternating along the mandrel (in a circumferential direction).

[0030] A first section with angle all can be followed by a second section with angle a21. The second section with angle a21 can in turn be followed by a first section with angle all, and so on. This continues along the thorn, circumscribing the central section.

[0031] The transitions between first sections with angle all and second sections with angle a21 can be continuous. The transitions between first sections with angle all and second sections with angle a21 can therefore be designed in such a way that there is no step or abrupt change in the angle between the inside of the mandrel and the central section or central plane.

[0032] Similarly, the transitions between first sections with angle all and second sections with angle a21 can be discontinuous. The transitions between first sections with angle all and second sections with angle a21 can therefore be designed such that there is a step or a sudden change in the angle between the inside of the mandrel and the central section or central plane.

[0033] The distribution of first sections with angle all and second sections with angle a21 along the mandrel can be uniform.

[0034] The distribution of first sections with angle all and second sections with angle a21 along the mandrel can also be uneven.

[0035] An (imaginary) cutting line may exist between the inner surface of the dome and the central section or the central plane. This cutting line may be a connecting line between the inner surface of the spindle and the central section, or an imaginary connecting line between the inner surface of the spindle and the central plane. The connecting line or the cutting line may delineate the inner surface of the spindle from the central plane or the central section. If a step is formed between the central section and the spindle, the cutting line or the connecting line may exist between the spindle and the step. The cutting line or the connecting line may be wavy. In particular, the cutting line or the connecting line is completely wavy around the entire perimeter of the central section (fully continuous).

[0036] The wavy-shaped cutting line or connecting line can be sinusoidal or sinuous.

[0037] In general, each of the first sections and / or each of the second sections (the outer or inner sides) can be line-shaped (lines), especially in the case of a continuous transition between sections with angle all and angle a21.

[0038] The first section or sections of the mandrel can extend over a length (in the circumferential direction) of at least 1.0 mm, preferably at least 2.0 mm, with a constant first angle.

[0039] The first section or sections of the mandrel can extend over a length (in the circumferential direction) of at most 20.0 mm, preferably at most 10.0 mm, particularly preferably at most 5.0 mm, with a constant first angle all.

[0040] The second section or sections of the mandrel can extend over a length (in the circumferential direction) of at least 1.0 mm, preferably at least 2.0 mm, with a constant second angle a21.

[0041] The second section or sections of the mandrel can extend over a length (in the circumferential direction) of at most 20.0 mm, preferably at most 10.0 mm, particularly preferably at most 5.0 mm, with a constant second angle a21.

[0042] The inner surface of the mandrel can have first and / or second sections with a constant inclination relative to the central section or plane, the sections extending in the circumferential direction (along the mandrel) over a length of at least 1.0 mm (at most 20.0 mm). The transition between the first and second sections with different inclinations can be abrupt or stepped.

[0043] In general, each of the first sections and / or each of the second sections (the outer or inner sides) can be flat (be flat).

[0044] The inside of the mandrel can have at least five (different) first sections with angle all and at least five (different) second sections with angle a21.

[0045] Preferably, the inner surface of the mandrel has at least ten first sections with angles all and at least ten second sections with angles a21. More preferably, the inner surface of the dome has at least twenty first sections with angles all and at least twenty second sections with angles a21. The sections can be different sections along the dome (circling the central section).

[0046] The value of the first angle a21 of a first section of the dome's inner surface can be at least 3.0° less than the value of the second angle a21 of a second section of the dome's inner surface. In particular, the value of the first angle a21 is at least 5.0° less than the value of the second angle a21. Specifically, the value of the first angle a21 is at least 8.0° less than the value of the second angle a21.

[0047] The value of the first angle a21 of a first section of the dome's inner surface can be between 1.0° and 30.0° less than the value of the second angle a21 of a second section of the dome's inner surface. Specifically, the value of the first angle a21 is between 4.0° and 22.0° less than the value of the second angle a21. More specifically, the value of the first angle a21 is between 8.0° and 14.0° less than the value of the second angle a21.

[0048] The value of the first angle all can be between 65.0° and 85.0°. Preferably, the value of the first angle all is between 67.0° and 81.0°. More preferably, the value of the first angle all is between 69.0° and 77.0°. Even more preferably, the value of the first angle all is between 72.0° and 74.0°. The value of the first angle all can be approximately (± 1%) 73.0°.

[0049] The value of the second angle a21 can be between 70.0° and 100.0° (or 70.0° and 90.0°). Preferably, the value of the second angle a21 is between 74.0° and 92.0°.

[0050] Preferably, the value of the second angle a21 lies between 78.0° and 86.0°. Even more preferably, the value of the second angle a21 lies between 83.0° and 85.0°. The value of the second angle a21 can be approximately (± 1%) 84.0°.

[0051] The value of the first angle all and the value of the second angle a21 can (both) be less than 90.0°. Specifically, the value of the first angle all and the value of the second angle a21 lie between 65.0° and 88.0°. Most preferably, the value of the first angle all and the value of the second angle a21 lie between 71.0° and 86.0°.

[0052] The first and second sections of the inner surface of the dome can both cause an undercut, with the undercut of the first section being more pronounced than the undercut of the second section.

[0053] The inner surface of the dome may be uneven. In particular, the inner surface of the dome is wavy along its entire circumference (always continuous). The inner surface of the dome may also be stepped.

[0054] An inner edge can be formed between the inside and top of the dome. This inner edge can separate the top from the inside of the dome. The inner edge can be annular, at least in sections. Specifically, the inner edge can be entirely annular. The inner edge can have a constant radius along the entire length of the dome.

[0055] The inner edge of the dome can be straight, at least in sections, for example over a distance of at least 5.0 mm.

[0056] The inner edge can enclose or surround an essentially rectangular surface. The rectangular surface can have rounded corners.

[0057] The inner edge can enclose or surround an essentially oval flat.

[0058] The inner edge can enclose or enclose an essentially polygonal or n-sided surface, specifically with n (integer) 3 to 10; the corners can be rounded.

[0059] The lid may have a skirt.

[0060] The apron can be positioned radially or laterally outside the pin. The apron can be (directly) attached to the pin.

[0061] The apron can be arranged axially below the dome.

[0062] The apron may have a first section, the first section of which extends obliquely relative to the central section or central plane.

[0063] The apron may have a second section, the second section extending substantially (± 5%) parallel to the central section or central plane.

[0064] The second section of the apron can be (directly) attached to the first section of the apron.

[0065] The apron may have a third section, the third section extending substantially (± 5%) parallel to the central section or central plane.

[0066] The apron may have a fourth section that extends substantially (± 5%) perpendicular to the central section or the central plane. The first section of the apron may connect (directly) to the fourth section of the apron.

[0067] The fourth section of the apron can (directly) connect to the third section of the apron.

[0068] A step can be formed between the third and fourth sections of the apron. The step can be (completely) circumferential.

[0069] The apron may have a recess. This recess can be a projection extending towards the central section and forming sections within the apron. There may be several (at least four) recesses in the apron.

[0070] The inlet and the step can be arranged so that when two identical lids are stacked, at least one section of the inlet contacts at least one section of the step.

[0071] The spike may have a step. The step may (vol Istandig) be circumferential.

[0072] The step of the thorn can be formed between the top of the thorn and the outer side of the thorn.

[0073] The cover may include a recess, which may be formed at least partially on the outside of the mandrel.

[0074] The step and the indentation can be designed such that at least one section of the indentation rests against at least one section of the step when two identical lids are stacked.

[0075] Generally, the lid can have a round base. It can also have a rectangular base or be rectangular in shape. A rectangular or rectangular lid can have rounded corners.

[0076] A lid for a container can have a central section and a pin. The pin has an inner surface, a top surface, and an outer surface. The central section transitions (directly) into the inner surface of the pin. A line of intersection or connection is formed between the inner surface of the pin and the central section. This line of intersection or connection is at least partially wavy.

[0077] A lid for a container can have a central section, a step, and a spike. The spike has an inner side, a top side, and an outer side. The step lies between the central section and the inner side of the dome. The step transitions into the inner side of the dome, thus forming a line of intersection or connection between the step and the inner side of the dome. This line of intersection or connection is, at least in some sections, wavy.

[0078] In particular, the cutting line or connecting line is sinusoidal or sinusoidal in shape.

[0079] Each of the lids can encompass any of the features disclosed herein.

[0080] A container can encompass any of the lids disclosed herein. The container can be a cup.

[0081] The container can have a volume of at least 50 cm³ 3 or at least 200 cm 3 (especially at least 300 cm) 3or 400 cm 3 The container can therefore be filled with a load and store the load, provided the load has a volume of at least 50 cm³. 3 or at least 200 cm 3 (especially at least 300 cm) 3 or 400 cm 3 ) exhibits.

[0082] The container can have a maximum volume of 10,000 cm³ 3 , in particular a maximum of 3,000 cm 3 , preferably a maximum of 1,000 cm 3 or a maximum of 700 cm 3 exhibit or record.

[0083] The container may contain or be made of plastic.

[0084] In particular, the container is made of the same material as the lid.

[0085] The container may be closed with a lid. In particular, the closed container is filled, for example with a foodstuff or a solid food product. The foodstuff may be a spreadable fat, especially butter or margarine.

[0086] The lid can be manufactured by thermoforming (deep drawing). A sheet of plastic, specifically a plastic film, can be provided for this purpose. The lid can then be thermoformed from this plastic sheet.

[0087] The lid can be manufactured by injection molding. The embodiments of the invention are illustrated by means of an example, but not in a way that allows limitations from the figures to be transferred or read into the claims. Identical reference numerals in the figures denote identical elements.

[0088] Figure 1 shows a lid 100 in a perspective view from an oblique angle above;

[0089] Figure 2 shows the lid 100 in a perspective view from an oblique angle below;

[0090] Figure 3a shows the lid 100 from below;

[0091] Figure 3b shows the lid 100 in a partially cut-away side view;

[0092] Figure 4 shows a section of the lid 100 in a sectional view, which is similar to the sectional view of Figure 3b and shows a first section 122;

[0093] Figure 5 shows a section of the lid 100 in a sectional view, which is similar to the sectional view of Figure 3b and shows a second section 123;

[0094] Figure 6 shows a stack 200 of two lids 100a, 100b in a sectional view similar to the sectional view shown in Figure 4;

[0095] Figure 7 shows a lid 300 in a perspective view from an oblique angle above;

[0096] Figure 8 shows the lid 300 in a perspective view from an oblique angle below;

[0097] Figure 9a shows the lid 300 from below;

[0098] Figure 9b shows the lid 300 in a partially cut-away side view;

[0099] Figure 10 shows a section of the lid 300 in a sectional view, which is similar to the sectional view of Figure 9b and shows a first section 322;

[0100] Figure 11 shows a section of the lid 300 in a sectional view, which is similar to the sectional view of Figure 9b and shows a second section 323;

[0101] Figure 12 shows a stack 400 of two lids 300a, 300b in a sectional view similar to the sectional view shown in Figure 10;

[0102] Figure 13 shows a lid 500 in a perspective view from an oblique angle above;

[0103] Figure 14 shows the lid 500 in a perspective view from an oblique angle below; Figure 15a shows the lid 500 in a bottom view;

[0104] Figure 15b shows the lid 500 in a partially cut-away side view;

[0105] Figure 16 shows a section of the lid 500 in a sectional view, which is similar to the sectional view of Figure 15b and shows a first section 522;

[0106] Figure 17 shows a section of the lid 300 in a sectional view, which is similar to the sectional view of Figure 15b and shows a second section 523;

[0107] Figure 18 shows a stack 600 of two lids 500a, 500b in a sectional view similar to the sectional view shown in Figure 16;

[0108] Figure 19 shows a lid 700 in a perspective view from an oblique angle above;

[0109] Figure 20 shows the lid 700 in a perspective view from an oblique angle below;

[0110] Figure 21a shows the lid 700 from below;

[0111] Figure 21b shows the lid 700 in a partially cut-away side view;

[0112] Figure 22 shows a section of the lid 700 in a sectional view, which is similar to the sectional view of Figure 21b and shows a first section 722;

[0113] Figure 23 shows a section of the lid 700 in a sectional view, which is similar to the sectional view of Figure 21b and shows a second section 723;

[0114] Figure 24 shows a stack 800 of two lids 700a, 700b in a sectional view similar to the sectional view shown in Figure 22.

[0115] Figure 1 shows a lid 100. The lid 100 has a central section (lid mirror) 110. The central section 110 is flat and defines a central plane with the circumferential component cp and the radial component r in a cylindrical coordinate system. The axial direction z extends perpendicular to the central plane (cp and r).

[0116] The cover 100 further comprises a dome 120. The dome 120 comprises an inner surface 124, a top surface 126, and an outer surface 127. An upper inner edge 125 of the mandrel 120 is formed between the inner surface 124 and the top surface 126 of the mandrel 120. The dome 120 is essentially annular in shape and completely surrounds the central section 110. This means that the central section 110 is radially internal to the dome 120.

[0117] The inner edge 125 of the mandrel 120 is formed in an annular shape.

[0118] The inner surface 124 of the mandrel 120 has an uneven surface. The inner surface 124 comprises several first sections 122 and several second sections 123. The first sections 122 have a different inclination than the second sections 123, each relative to the central section 110.

[0119] A step 150 is formed between the inner surface 124 of the mandrel 120 and the central section 110. The inner surface 124 of the mandrel 120 transitions into a section of the step 150, forming a section line or connecting line 121. The section line or connecting line 121 is wavy. The wavy shape of the connecting line or section line 121 results from the arrangement of first sections 122 and second sections 123 along the mandrel 120 in the circumferential cp direction and their relative arrangement to each other.

[0120] The cover 100 further includes an apron 130. The apron 130 is arranged radially outside the dome 120. The apron 130 adjoins (directly) the outer side 127 of the mandrel 120.

[0121] The lid 100 has several indentations 140. Indentations 140 are radially inwardly directed projections. The indentations 140 can be distributed circumferentially and can be formed at least partially in the dome 120 and / or the skirt 130.

[0122] The indentations 140 can be evenly distributed or unevenly distributed. Specifically, at least four, and in particular at least eight, indentations 140 are formed in the lid 100.

[0123] Figure 2 shows the lid 100 from below. The step 150 lies between the central section 110 and the dome 120. A section of the step 150, together with the dome 120, forms the connecting line or section line 121 mentioned in relation to Figure 1.

[0124] The indentations 140, as radially inwardly directed projections, are formed partly in the dome 120 and partly in the apron 130.

[0125] In the underside view of Figure 3a, the course of the connecting line or section line 121 is particularly clearly visible. The connecting line or section line 121 is formed between a section of the step 150 and the inner surface 124 of the dome 120 (see Figures 1 and 2). First sections 122 with a relatively steep inclination relative to the central section 110 create areas with a relatively steep radial extent of the section line or connecting line 121. Second sections 123 with a relatively shallow inclination relative to the central section 110 create areas of the section line or connecting line 121 with a relatively short radial extent.

[0126] Figure 3b shows a partially cutaway side view of the lid 100. The section on the right side of the lid 100 in Figure 3b shows the profile of a section of the lid 100. The profile of the step 150 and the skirt 130 are constant around their circumference (except for circumferentially arranged indentations 140). The profile of the inner surface 124 of the dome 120 changes around its circumference, which is explained in more detail with reference to Figures 4 and 5.

[0127] Components of the dome 120, except for the side wall 124 and inset 140, are designed with a constant profile all around.

[0128] Figure 4 shows a sectional view similar to the radially outer area of ​​the section in Figure 3b. In Figure 4, the cover 100 is cut axially such that a first section 122 of the side wall 124 is exposed. The section 122 has a relatively large inclination (small angle) relative to the central section 110.

[0129] The central section 110 defines a central plane ZE1. The central section 110 (cover mirror) lies completely within the central plane ZE1.

[0130] Between the central plane ZE1 and the first section 122 of the inner surface 124 of the dome 120, a first angle is formed. The first angle is less than 90 degrees and lies specifically between 65.0 degrees and 85.0 degrees. In a special embodiment, the angle can be approximately 73.0 degrees.

[0131] Between the central section 110 and the inner surface 124 of the dome 120, a step 150 is formed, connecting the inner surface 124 of the dome 120 and the central section 110. The step 150 has a first step section 151, which is essentially parallel to the central section 110 and the central plane ZE1. In this embodiment, the intersection line or connecting line 121 (see Figures 1 to 3a) is formed between the inner surface 124 of the dome 120 and the first section 151 of the step 150.

[0132] Stage 150 includes a second section 152, which is essentially (± 10%) perpendicular to the central plane ZE1 and to the central section 110.

[0133] The pin 120 comprises a step 128. The step 128 is located between the upper surface 126 of the dome 120 and the outer surface 127 of the dome 120 and connects these sections. The step 128 can completely encircle the cover 100. The step 128 can also be formed only partially within the dome 120 in a circumferential direction.

[0134] The lid 100 includes an apron 130. The apron 130 connects to the dome 120, specifically to the outer side 127 of the spike 120.

[0135] The apron 130 comprises a first section 131, which is angled radially outwards relative to the outer face 127 of the mandrel 120. The first section 131 of the apron 130 is oriented obliquely relative to the central section 110 and to the central plane ZE1.

[0136] The apron 130 comprises a second section 132, which adjoins the first section 131. The second section 132 of the apron 130 is located radially outward relative to the dome 120 and to the first section 131 of the apron 130. The second section 132 of the apron 130 is located essentially (± 10%) parallel to the central section 110 and to the central plane ZE1.

[0137] Figure 5 shows a sectional view of the cover 100, which is similar to the sectional view in Figure 4. In the sectional view of Figure 5, the cover 100 is cut such that a second section 123 of the inner surface 124 of the mandrel 120 is visible.

[0138] The central section 110 in turn defines the central level ZE1.

[0139] A second angle a21 is formed between the second section 123 of the inner side 124 of the mandrel 120 and the central plane ZE1.

[0140] The second angle a21 is greater a Is the first angle all between a first section 122 of the inside 124 of the mandrel 120 and the central plane ZE1.

[0141] As explained with reference to Figure 4, the section line or connecting line 121 (see Figures 1 to 3a) is formed between the step 150, in particular the first section 151 of the step 150, and the inside 124 of the mandrel 120, in particular the second section 123 of the mandrel 120. Because the second angle α21 is larger than the first angle α21, the radial extent of the first section 151 of the step 150 in a region of the second section 123 is less than in a region of the first section 122.

[0142] The transition from first sections 122 to second sections 123 of the inner surface 124 of the mandrel 120 can be continuous. Thus, between these sections (in the circumferential direction), there are no abrupt or very large changes in the angle α between the inner surface 124 of the mandrel 120 and the central plane ZE1. In other embodiments, the transition from first sections 122 to second sections 123 can be abrupt or involve a larger change in the angle α per distance in the circumferential direction.

[0143] In further embodiments, a first section 122 with angle all can extend over a distance of at least 1.0 mm in the circumferential direction with a constant first angle all. Thus, there can be sections on the inner side 124 of the mandrel 120 that have a constant profile in the axial section in the circumferential direction. This is analogous for second sections 123 on the inner side 124 of the mandrel 120.

[0144] Indentations 140 (see Figure 5) can be formed partly in the outer surface 127 of the mandrel 120 and partly in the skirt 130 of the cover 100. Indentations 140 can also be formed only in the outer surface 127 of the mandrel 120 or only (exclusively) in the skirt 130.

[0145] Inset 140 are sections of the cover 100 which extend in a circumferential direction in sections radially inwards (in the direction of the central section 110).

[0146] Figure 6 shows a sectional view of a section of a stack 200 of identical lids 100a and 100b. Each of the lids 100a and 100b can be a lid 100 described and disclosed herein.

[0147] The stack of lids 200 is cut such that a first section 122a of the first lid 100a and a first section 122b of the second lid 100b are exposed. The first angle all, as described with reference to Figure 4, is relatively small, so that an undercut in this section is relatively large.

[0148] The stage 150a of the lid 100a, which lies between the first section 122a and the central section 110a, includes the first section 151a and the second section 152a.

[0149] During stacking, the first section 151a of stage 150a rests axially on the top surface 126b of lid 100b. Because the first angle is relatively small, i.e., the radial extent of the first section 151a of stage 150a is relatively large, the bearing surface of the first section 151a of stage 150a on the top surface 126b of lid 100b is relatively large, and lids 100a and 100b can be stacked stably.

[0150] The first lid 100a includes a recess 140a, and the second lid 100b includes a step 128b. When the lids are stacked, a section of the recess 140a of lid 100a rests against a section of the step 128b of lid 100b. This provides additional stability to the stack of lids 200.

[0151] Generally, a stack of lids preferably comprises at least ten, more preferably at least twenty, and still more preferably at least three identical lids.

[0152] In areas of the side wall 124 where second sections 123 with a relatively large second angle α21 are formed, the bearing surface between the step and the top of the dome is smaller; however, these second sections 123 form smaller undercuts, thus facilitating demolding of the lid (forced demolding). The lid therefore offers stackability with high stability, while at the same time ensuring good demoldability during manufacturing.

[0153] Figures 7 to 9a show a lid 300. The lid 300 comprises a central section 310, a pin 320 and a skirt 330.

[0154] The mandrel 320 comprises an inner side 324, a top side 326 and an outer side 327.

[0155] The inner surface 324 of the lid 300 has sections with different inclinations relative to the central section 310. A first section 322 of the inner surface 324 of the lid 300 has a relatively large inclination to the central section 310, and a second section 310 of the inner surface 324 of the lid 300 shows a relatively small inclination relative to the central section 310. The central section 310 can also be referred to as the lid surface.

[0156] An upper inner edge 325 is formed between the inner surface 324 and the upper surface 326 of the lid 300. The inner edge 325 is essentially annular in shape.

[0157] The inner surface 324 of the lid 300 transitions (directly) into the central section 310. A cutting line or connecting line 321 is formed between the inner surface 324 and the central section 310. The cutting line or connecting line 321 is not circular. The cutting line or connecting line 321 has a wave-like basic shape.

[0158] The apron 330 adjoins the mandrel 320 radially offset to the outside. Several indentations 340 are formed in the apron 330 as radially inwardly extending projections.

[0159] In the underside view of Figure 9a of the lid 300, the non-circular course of the section line or connecting line 321 is particularly evident. First sections 322 in the inner surface 324 of the lid 300 result in sections that extend relatively far radially outwards. Second sections 323 in the inner surface 324 of the lid 300 form sections that extend relatively little radially outwards (compared to sections resulting from second sections 323 of the inner surface 324).

[0160] Figure 9b shows a side view of the lid 300, which is partially cut away by an axially located section. The central section 310 transitions (directly) into the dome 320. The dome 320 transitions (directly) into the skirt 330.

[0161] Figure 10 shows a section of the lid 300, which is located similarly to a section of the partial section of Figure 9b.

[0162] The central section 310 defines a central plane ZE3. In this embodiment, the central section 310 lies completely within the central plane ZE3. The cover 300 is cut such that a first section 322 of the inner surface 324 of the cover 300 is exposed.

[0163] Between the first section 322 of the inner surface 324 and the central section 310 and the central plane ZE3, a first angle al3 is formed. The angle al3 can lie between 65.0° and 85.0°.

[0164] The central section 310 extends (directly) into the inner surface 324 of the lid 300. The connecting line or section line 321 is formed between the central section 310 and the inner surface 324 of the lid (see Figures 7 to 9a).

[0165] The skirt 330 of the lid 300 adjoins (directly) the dome 320. The skirt 330 comprises a first section 331. The first section 331 of the skirt 330 is oriented obliquely radially outwards and axially downwards relative to the central section 310.

[0166] The apron 330 comprises a second section 332. The second section 332 of the apron 330 is located radially outside relative to the first section 331 and extends essentially (± 5%) parallel to the central section 310 and to the central plane ZE3.

[0167] The apron 330 comprises a third section 333. The third section 333 of the apron 330 adjoins the dome 320. The third section 333 of the apron 330 is oriented essentially (± 5%) parallel to the central plane ZE3 and the central section 310.

[0168] The skirt 330 comprises a fourth section 335, which is located radially outside relative to the dome 320. The fourth section 335 of the skirt 330 is located essentially (± 5%) perpendicular to the central section 320 and to the central plane ZE3. A step 334 is formed between the third section 333 and the fourth section 335 of the skirt 330. The step can be formed continuously around the entire skirt between the third section 333 and the fourth section 335. The step 334 can also be formed only in sections (in a circumferential direction) between the third section 333 and the fourth section 335 of the skirt 330.

[0169] In particular, the outer side 327 of the spike 320 transitions into the third section 333 of the apron 330. The third section 333 of the apron 330 can transition into level 334. Level 334 can transition into the fourth section 335 of the apron 330. The fourth section 335 of the apron 330 can transition into the first section 331 of the apron 330. The first section 331 of the apron 330 can transition into the second section 332 of the apron 330.

[0170] In the area of ​​the apron 330, one or more indentations 340 can be formed. The indentation extends radially inwards as a projection. At least four or at least eight indentations 340 can be formed around the circumference of the apron 330.

[0171] Figure 11 shows a sectional view of a section of the cover 300. The section is positioned such that a second section 323 is exposed.

[0172] An angle α23 is formed between the second section 323 of the inner surface 324 and the central section 310 and the central plane ZE3. The angle α23 lies between 70.0° and 100.0°.

[0173] The angle a23 is larger than the angle al3 formed between a first section 322 and the central section 310 and central plane ZE3.

[0174] Figure 12 shows a stack of lids 400 comprising a first lid 300a and a second lid 300b. Each of the lids 300a and 300b can be any of the lids disclosed herein.

[0175] The first cover 300a comprises a central section 310a, a first inner section 122a of the mandrel 320a, and a top surface 326a of the mandrel 320a. The skirt 330a of the first cover 300a includes the step 334a. A recess 340a is formed in the cover 300a.

[0176] The second lid 300b has the same features, which are designated by a b instead of a. The stack 400 is cut such that first sections 322a and 322b are exposed at a small angle al3. This allows a relatively large proportion of the central section 310a of the first lid 300a to contact the top 326b of the second lid 300b. In areas where the inside of the mandrel has a second section 323, the contact area between a central section of an upper lid and the top of a mandrel of a lower lid is smaller; however, the undercut is smaller in such an area, thus ensuring good demoldability of the lid.

[0177] To further improve the stability of the stack 400, a section of an inlet 340a of the first lid 300a abuts a section of a step 334b ​​of a second lid 300b.

[0178] Figures 13 to 15a show a lid 500. The lid 500 has a rectangular base shape. Specifically, the lid 500 has a rectangular base shape with rounded corners.

[0179] The cover 500 comprises a central section 510, wherein the central section 510 can define an xy-plane and is oriented perpendicular to the xy-plane in a z-direction. The cover 500 further comprises a mandrel 520 and a skirt 530.

[0180] The mandrel 520 comprises an inner surface 524, a top surface 526, and an outer surface 527. In the inner surface 524 of the mandrel 520, first sections 522 and second sections 523 are formed. The first sections 522 have a greater inclination relative to the central section 510 than the second sections 523.

[0181] An upper inner edge 525 is formed between the inner surface 524 of the mandrel 520 and the upper surface 526 of the mandrel 520. The upper inner edge 525 encloses a substantially rectangular surface. Specifically, the surface enclosed by the upper inner edge 525 is rectangular with rounded corners.

[0182] The skirt 530 adjoins the pin 520 of the cover 500. Several recesses 540 (at least one recess 540) are formed in the skirt 530. In particular, at least four, specifically at least eight, recesses are arranged as projections, directed towards the central section 510, circumferentially along the pin in the skirt 530.

[0183] A step 550 is formed between the central section 510 and the inner surface 524 of the mandrel 520. A cutting line or connecting line 521 is formed between the inner surface 524 of the mandrel 520 and the step 550. The cutting line or connecting line 521 has a substantially wave-like or undulating shape (see Figure 14). First sections 522 and second sections 523 in the inner surface 524 of the mandrel 520 form areas of the step 550 with a broad, outwardly oriented extension. Such areas with greater outward extension are formed by first sections 522 with a relatively greater inclination relative to the central section 510, and areas with a relatively small outward extension are formed by second sections 523 in the inside 524 of the dome 520 with a relatively small inclination relative to the central section 510.

[0184] Figure 15b shows a side view of the cover 500, the side view being partially cut by an axially oriented section. The section exposes a profile of the cover 500.

[0185] The central section 510 transitions (directly) into level 550. Level 550 transitions (directly) into the thorn 520. The thorn 520 transitions (directly) into the apron 530.

[0186] Figure 16 shows a section of a portion of the lid 500. The section is positioned such that a first section 522 is shown on the inside 524 of the dome 520.

[0187] The central section 510 defines a central plane ZE5. The central section lies (entirely) in the central plane ZE5. A first angle al5 is formed between the first section 522 of the inner surface 524 and the central plane ZE5. The first angle al5 can be between 65.0° and 85.0°.

[0188] Stage 550 comprises a first section 551. The first section 551 of stage 550 is oriented essentially (± 5%) parallel to the central plane ZE5 and the central section 510. The second section 552 of stage 550 is oriented essentially (± 5%) perpendicular to the central section 510 and central plane ZE5.

[0189] The central section 510 transitions (directly) into the second section 552 of level 550. The second section 552 of level 550 transitions (directly) into the first section 551 of level 550. The first section 551 of level 550 transitions (directly) into the inner side 524 of the dome 520.

[0190] A step 528 is formed between the upper surface 526 of the dome 520 and the outer surface 527 of the dome 520. The step 528 can completely encircle the cover 500 along the dome 520. Alternatively, the step 528 can be formed only partially within the pin 520.

[0191] The apron 530 comprises a first section 531 and a second section 532. The first section 531 of the apron 530 is oriented obliquely relative to the central section 510. The second section 532 of the apron 530 is essentially (± 5%) parallel to the central section 510 and to the central plane ZE5.

[0192] The lid 500 has one or more recesses 540. Specifically, the recess 540 is formed at least partially with the outer surface 527 of the dome. The recess 540 can also be formed at least partially in the skirt 530. Specifically, the recess 540 is formed partly in the outer surface 527 of the dome 520 and partly in the skirt 530.

[0193] Figure 17 shows a similar section to that shown in Figure 16, wherein the section of Figure 17 is positioned such that a second section 523 of the inner side 524 of the dome is exposed.

[0194] A second angle a25 is formed between the central plane ZE5 and the second section of the inner side 524. The second angle a25 is greater than the first angle al5.

[0195] In an area of ​​the side wall 524 in which a second section 523 is formed, the first section 551 of the step 550 has a smaller outward extension than in the area of ​​a first section 522 in the inner side 524.

[0196] Figure 18 shows a stack of lids 600 with a first lid 500a and a second lid 500b. Each of the lids 500a and 500b can be any of the lids disclosed and described herein.

[0197] The first cover 500a comprises a central section 510a, a step 550a with a first section 551a and a second section 552a, a mandrel 520a with a second inner section 523a and a step 528a. A recess 540a is also formed in the cover 500a.

[0198] The second lid 500b has the same features as the lid 500a, except that the corresponding reference numeral is marked with a b instead of an a.

[0199] The section in Figure 18 is positioned such that an inner section 523a with a relatively large angle α25 is shown. The contact area between the step 550a and the top surface 526b of the dome 520b of the second cover 500b is relatively small here.

[0200] The inlet 540a of the first lid 500a contacts the stage 528b of the second lid 500b, thereby improving the stability of the stack 600.

[0201] Figures 19 to 21a show a lid 700. The lid 700 has a rectangular base shape. Specifically, the lid has a rectangular base shape with rounded corners. The lid 700 includes a central section 710, which can define an xy-plane. A z-direction can be perpendicular to the xy-plane.

[0202] The lid 700 further comprises a dome 720 and a skirt 730. The dome 720 comprises an inner surface 724, a top surface 726 and an outer surface 727.

[0203] The inner surface 724 of the mandrel 720 has first sections 722 and second sections 723. The first sections 722 have a greater inclination relative to the central section 710 than the second sections 723.

[0204] An upper inner edge 725 is formed between the inner surface 724 of the mandrel 720 and the upper surface 726 of the mandrel 720. The upper inner edge 725 has a substantially rectangular basic shape. Specifically, the upper inner edge 725 has a rectangular basic shape with rounded corners. The upper inner edge 725 can include a substantially rectangular surface or a rectangular surface with rounded corners.

[0205] A step 750 is formed between the central section 710 and the inner surface 724 of the mandrel 720. The inner surface 724 transitions into the step 750, forming a cutting or connecting line 721. The cutting or connecting line 721 is essentially wavy in shape.

[0206] The lid 700 includes a skirt 730, which connects laterally to the dome 720 on the outside.

[0207] The lid 700 includes a tab 760, which makes it easier for a consumer to remove the lid 700 from a container. The tab 760 can be located at a corner of the lid 700.

[0208] The cover 700 includes first indentations 740 and second indentations 741. The indentations 740 and 741 are projections directed inwards towards the central section 710.

[0209] The first indentations (740) are formed in the apron (730). The second indentations (741) are formed in the dome (720), especially in the outer side (727) of the thorn (720).

[0210] The cover 700 comprises at least one first indentation 740 and / or at least one second indentation 741. Specifically, the cover 700 comprises at least three or five first indentations 740 and / or at least three or five second indentations 741. The indentations can be arranged uniformly or unevenly distributed around the mandrel 720. Figure 21b shows a side view of the cover 700, with the cover partially cut in the axial direction.

[0211] The central section 710 of the lid 700 transitions over the step 750 into the dome 720. The dome 720 transitions into the apron 730.

[0212] Figure 22 shows a section of a portion of the lid 700, similar to the section in Figure 21b.

[0213] The central section 710 defines a central plane ZE7. The central section 710 lies entirely within the central plane ZE7. The section in Figure 22 is positioned such that a first section 722 with a relatively steep inclination relative to the central section 710 and the central plane ZE7 is exposed.

[0214] An angle al7 is formed between the first section 722 of the inner surface 724 of the mandrel 720 and the central plane ZE7. The first angle al7 can have a value between 65.0° and 85.0°.

[0215] The 750 stage has a first section 751, which transitions into the inner surface 724 of the mandrel 720. A second section 752 of the 750 stage transitions into the central section 710.

[0216] The first section 751 of level 750 is essentially (± 5%) parallel to the central section 710 and to the central plane ZE7. The second section 752 of level 750 is essentially (± 5%) perpendicular to the central section 710 and to the central plane ZE.

[0217] Between the inner surface 724 and the level 750 a cutting line or connecting line 721 is formed, which extends essentially in a wave-like shape along the circumference of the lid.

[0218] The apron 730 comprises a first section 731 and a second section 732.

[0219] The first section 731 is oriented obliquely relative to the central section 710, and the second section 732 of the skirt 730 is oriented essentially (± 5%) parallel to the central section and to the central plane ZE7.

[0220] The apron 730 further comprises a third section 733 and a fourth section 735.

[0221] The third section 733 of the apron 730 extends substantially (± 5%) parallel to the central section 710 and the central plane ZE7. The fourth section 735 of the apron 730 extends substantially (± 5%) perpendicular to the central section 710 and the central plane ZE7.

[0222] A step 734 is formed between the third section 733 of the apron 730 and the fourth section 735 of the apron 730. The step can completely encircle the cover 700 or only partially encircle it.

[0223] The third section 733 of the apron 730 can transition (directly) into stage 734. Stage 734 can transition (directly) into the fourth section 735. The fourth section 735 can transition (directly) into the first section 731. The first section 731 can transition (directly) into the second section 732.

[0224] Figure 23 shows a section similar to that shown in Figure 22, wherein the section is positioned such that a second section 723 with a slight inclination relative to the central section 710 and to the central plane ZE7 is exposed.

[0225] An angle α27 is formed between the second section 723 of the inner surface 724 of the mandrel 720 and the central plane ZE7. The angle α27 is relatively large. For example, the value of the angle α27 lies between 70.0° and 100.0°.

[0226] Figure 24 shows a lid stack 800, wherein the lid stack 800 comprises a first lid 700a and a second lid 700b. Each of the lids 700a and 700b can be any of the lids disclosed herein.

[0227] The first cover 700a comprises a central section 710a and a step 750a with a first section 751a and a second section 752a. The inner section 723a corresponds to section 723 from Figure 23. A dome top 726a is also shown.

[0228] In the cathedral exterior 727a, a second indentation 741a is formed.

[0229] In the apron 730a a step 734a and a first indentation 740a are formed.

[0230] Lid 700b includes the same features as lid 700a, where these features are designated by a reference sign with a b instead of an a.

[0231] When two identical lids 700a, 700b are stacked, a section of step 750a rests against the top surface 726b of the second lid 700b. Similarly, a section of the second indentation 741a can rest against a section of the top surface 726b of the second lid 700b.

[0232] The first indentation 740a of the first lid 700a can contact the stage 734b of the second lid 700b. The design of the lid 700 (700a, 700b) ensures good stackability of the lids while simultaneously allowing for good demolding.

[0233] In general, the inner edge of a lid can have a diameter between 40 mm and 200 mm, preferably between 80 mm and 160 mm, more preferably between 105 mm and 125 mm, and even more preferably between 110 mm and 120 mm. Specifically, the inner edge 125 of the lid can have a diameter of approximately (± 2%) 115 mm.

[0234] The surface area of ​​the central section of a lid can range from 1,000 mm 2 and 50,000 mm 2 preferably between 2,000 mm 2 and 35,000 mm 2 preferably between 4,000 mm 2 and 25,000 mm 2 , even more preferably between 9,000 mm 2 and 11,000 mm 2 , lay.

[0235] In general, "essentially" can mean a deviation of ± 5%, preferably of ± 3%, and particularly preferably of ± 1%.

Claims

Claims ...

1. Lid for a container, the lid (100, 300, 500, 700) with a central section (110, 310, 510, 710) and a dome (120, 320, 520, 720), wherein ... (a) the central section (110, ...) defines a central level (ZE1, ZE3, ZE5, ZE7); (b) the dome (120, ...) has an inside (124, 324, 524, 724), a top (126, 326, 526, 726) and an outside (127, 327, 527, 727); (c) the inside (124, ...) of the mandrel (120, ...) has a first section (122, 322, 522, 722) wherein a first angle (all, al3, al5, al7) is formed between the first section (122, ...) and the central plane; (d) the inside (124, ...) of the mandrel (120, ...) has a second section (123, 323, 523, 723) wherein a second angle (a21, a23, a25, a27) is formed between the second section (123, ...) and the central plane; and (e) the value of the first angle (all, ...) is different from the value of the second angle (a21, ...).

2. Lid according to claim 1, wherein the inside (124, ...) has several first sections (122, ...) and several second sections (123, ...) and the first and second sections (122, 123; ...) are arranged alternately, in particular regularly alternating, along the mandrel (120, ...).

3. Cover according to claim 2, wherein the first sections and the second sections (122, 123; ...) are arranged such that a cutting line or connecting line (121, 321, 521, 721) between the inside (124, ...) of the mandrel (120, ...) and the central section (110, ...) or the central plane (ZE1, ...) is corrugated.

4. Lid according to claim 2, wherein a step (150, 550, 750) is arranged between the inside (124, ...) of the mandrel (120, ...) and the central section (110, ...), and a section line or connecting line (121, ...) between the inside (124, ...) of the mandrel (120, ...) and a section of the step (150, ...) is corrugated.

5. Lid according to claim 1 or 2, wherein the first section (122, ...) of the mandrel (120, ...) extends over a length of at least 1.0 mm along the mandrel (120, ...) at a constant first angle (all, ...); and / or wherein the second section (123, ...) of the dome (120, ...) extends over a length of at least 1.0 mm along the dome (120, ...) with a constant second angle (a21, ...).

6. Lid according to one of the preceding claims, wherein the inside (124, ...) has at least five first sections (122, ...) and at least five second sections (123, ...), preferably the inside (124, ...) has at least ten first sections (122, ...) and at least ten second sections (123, ...), particularly preferably the inside (124, ...) has at least twenty first sections (122, ...) and at least twenty second sections (123, ...).

7. Lid according to one of the preceding claims, wherein the value of the first angle (all, ...) is at least 3.0° less than the value of the second angle (a21, ...), preferably at least 5.0° less, more preferably at least 8.0° less.

8. Lid according to any of the preceding claims, wherein the value of the first angle (all, ...) is between 65.0° and 85.0°, preferably between 67.0° and 81.0°, particularly preferably between 69.0° and 77.0°, most preferably between 72.0° and 74.0°.

9. Lid according to one of the preceding claims, wherein the value of the second angle (a21, ...) is between 70.0° and 100.0°, preferably between 74.0° and 88.0°, particularly preferably between 78.0° and 86.0°, most preferably between 83.0° and 85.0°.

10. Lid according to one of the preceding claims, wherein the inside (124, ...) of the dome (120, ...) has an uneven surface, in particular a corrugated or wavy surface.

11. Lid according to one of the preceding claims, wherein the mandrel (120, ...) has an upper inner edge (125, ...) between the top (126, ...) and the inside (124, ...) of the dome (120, ...), wherein the upper inner edge (125, ...) is formed in an annular shape at least in sections, in particular the upper inner edge (125, ...) has a constant radius at least in sections along the dome (120, ...).

12. Lid according to one of claims 1 to 10, wherein the mandrel (520, 720) has an upper inner edge (525, 725) between the top (526, 726) and the inside (524, 724) of the dome (520, 720), wherein the upper inner edge (525, 725) is at least partially straight, in particular the inner edge (525, 725) includes an essentially rectangular surface, most preferably a rectangular surface with rounded corners.

13. Lid according to one of claims 1 to 12, wherein the lid (100, ...) has an apron (130, 330, 530, 730), in particular the apron (130, ...) is arranged laterally to the mandrel (120, ...).

14. Lid according to claim 13, wherein the apron (130, ...) has a first section (131, 331, 531, 731) extending obliquely relative to the central section (110, ...) or to the central plane (ZE1, ...) and a second section (132, 332, 532, 732) extending substantially parallel to the central section (110, ...) or to the central plane (ZE1, ...).

15. Lid according to claim 14, wherein the apron has a third section (333, 733) extending substantially parallel to the central section (310, 710) or to the central plane (ZE3, ZE7), and a fourth section (335, 735) extending substantially perpendicular to the central section (310, 710) or to the central plane (ZE3, ZE7).

16. Lid according to claim 15, wherein a step (334, 734) is formed between the third section (333, 733) and the fourth section (335, 735).

17. Lid according to one of claims 13 to 16, wherein a recess (340, 740) is formed in the apron (330, 730), in particular the recess (340, 740) and the step (334, 734) are arranged such that when two identical lids (300, ...) are stacked, the recess (340, 740) rests against the step (334, 734).

18. Lid according to one of claims 1 to 17, wherein the mandrel (120, ...) has a step (128, ...), in particular the step (128, ...) is arranged between the top (126, ...) and the outer (127, ...) of the mandrel (120, ...).

19. Cover according to one of claims 1 to 18, wherein the cover comprises a recess (140, ...), in particular the recess (140, ...) is formed at least sectionally in the outer side (127, ...) of the mandrel (120, ...).

20. Lid according to claims 18 and 19, wherein the indentation (140, ...) and the step (128, ...) are arranged such that when two identical lids (100, ...) are stacked, the indentation (140, ...) rests against the step (134, ...).

21. Lid according to any one of the preceding claims, wherein the lid has a round base shape, a rectangular base shape, in particular a square base shape, an oval base shape, a polygonal base shape, an n-sided base shape, wherein n is preferably a value from 3 to 10, or any other arbitrary base shape.

22. Lid for a container, the lid (100, ...) having a central section (110, ...) and a dome (120, ...), wherein ... (a) the dome (120, ...) has an inside (124, ...), a top (126, ...) and an outside (127, ...); (b) the central section (110, ...) transitions into the inner side (124, ...) of the mandrel (120, ...) so that a line of intersection or connecting line (121, ...) is formed between the central section (110, ...) and the inner side (124, ...) of the mandrel (120, ...); and (c) the section line or connecting line (121, ...) is at least sectionally wavy.

23. Lid for a container, the lid (100, ...) comprising a central section (110, ...), a step (150, ...) and a dome (120, ...), wherein ... (a) the dome (120, ...) has an inside (124, ...), a top (126, ...) and an outside (127, ...); (b) the step (150, ...) lies between the central section (110, ...) and the inner side (124, ...) of the mandrel (120, ...); (c) the step (150, ...) transitions into the inside (124, ...) of the mandrel (120, ...) such that a cutting line or connecting line (121, ...) is formed between the step (150, ...) and the inside (124, ...) of the mandrel (120, ...); and (d) the cutting line or connecting line (121, ...) is at least partially wavy.

24. Lid according to claim 22 or 23 having the features according to one of claims 1 to 21, in particular without the respective reference to claim 1.

25. Container with a lid according to one of the preceding claims.

26. Method for manufacturing a lid according to any one of claims 1 to 24, in particular by thermoforming or by injection molding.

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