WO2001085564A1 - Container with body and lid - Google Patents

Abstract

The invention relates to a container, comprising a barrel-like body (1) and a fitted, sealing lid with a seal, which excludes contamination of the contents during transport and storage and which permits opening and closing without a loss of sealing ability. The above is achieved without an elastomeric seal as an additional component, thus comprising as few components as possible. The container with a body (1) and lid (2) and a tightening device, for the seal tightening of the lid (2) against the body (1) is characterised in that, in the tightened state, the lid (2) engages tightly against the body (1) on a complete, annular first sealing position (4), which encircles the symmetrical axis of the container and the tightening device is axially separated from the first sealing position (4).

Description

 Container with body and lid

1. Field of application

The invention relates to a container with a barrel-like body and a matching, tight lid.

II. Technical background

It is common today to fill the powdered homo- and copolymers of tetrafluoroethylene (TFE) in barrel-like plastic containers or fiber drums, preferably with a pot-shaped body and a matching lid. The purpose of the containers is to protect the polymers mentioned, which are often manufactured and processed under clean room conditions, from dust and moisture as well as pressure loads. Foreign substances of all kinds, moisture and polymer particles compressed by pressure load lead to defects in the molded articles or extrudates made from them when processing the TFE polymers, which are unacceptable, particularly in the case of thin-walled products such as wire coatings or foils.

For high-quality end uses, plastic containers, for example made of polypropylene, are preferred to fiber drums for packaging polytetrafluoroethylene (PTFE) powders because they have a better surface finish and the insertion of a film inner bag to protect the powders can be omitted. High demands are made of various types on the plastic containers: they must be sufficiently leak-proof, even if they are opened and closed several times. According to DE-U-94 08 630, they must also withstand the loading pressure that occurs when the filled containers are stacked on top of each other on the individual packaging units. In practice, two to four pallet stacks are stacked on top of each other, which in turn are loaded with two to three layers of containers. The containers are filled with 20 to 50 kg of powder. When filling, certain bulk heights in the container must not be exceeded, otherwise the powder can cake together and error-free processing cannot be guaranteed.

Containers for PTFE powder in their technically complicated, high-quality designs are preferably manufactured by injection molding. Bulk plastics such as polypropylene or polyethylene are used for price reasons. Since a high level of stability of the containers during transport and storage is required, even at temperatures from -20 ° C to 60 ° C, chemically modified propylene copolymers are preferred as the material. The packaging systems have a high value, so that reuse, for example by cleaning and refilling, is aimed for.

Very special requirements are placed on the sealing of the containers for PTFE powder. Compared to the known one-lid system, for example for paint, the packaging system according to EP-B-362 959 is a round three-component system consisting of a container body, lid and clamping ring. The sealing principle consists in that the upper part of the body runs downwards inclined, whereas thin lugs in the inner edge of the lid are pressed onto the upper part of the body with the help of the clamping ring. However, the resilience of these handling flags is low, so that after a first opening and reclosing, the tightness decreases significantly. Reusing the lid and recycling the container is practically impossible. In addition, the manufacture of the sealing thin sealing lips by the injection molding process is technically very complex and prone to failure, since a complex venting must be available in the injection molding tool for the complete injection of the thin sealing lips. In the injection molding process, for example, polymeric deposits can lead to complete or partial clogging of the ventilation areas, which leads to incomplete spraying of the thin lugs and thus the sealing function is no longer guaranteed.

Analogously, this type of sealing with thin lugs inside the lid is described in WO-A-96/37 410 for a rectangular plastic container.

According to US-A-4 674 650, a seal for a round container made of plastic is described, which consists of the container body, lid and clamping ring. Sealing is carried out by an additional sealing ring inserted in the cover, which seals the outer, downward-facing body. The introduction of an additional sealing ring made of an elastic material has several disadvantages: it makes the system more expensive, makes automatic cleaning of the packaging system difficult before use, and must be separated as an additional material component when the packaging system is disposed of, if the container material is to be recycled.

In a commercially available packaging system consisting of a container body, lid and clamping ring from Sulo Plast GmbH & Co. KG, the tightness is achieved by pouring an elastomer seal, for example made of polyurethane, into a groove in the lid. This elastomer seal seals against the upper edge of the body. The main disadvantage of this system is that the seal can be damaged under the load pressure of the elastomer seal during transport and storage. Parts of the seal are removed and can be in the PTFE powder to be protected reach. In addition, the elastomer component must also be separated here if the container lids are sent to a recycling process after the packaging system has been used.

III. Presentation of the invention

a) Technical task

It is the object of the present invention to provide a container with a seal which prevents the contents from being contaminated during transport and storage, allows repeated opening and closing without sacrificing tightness and does not require an elastomeric seal as an additional material component and thereby manages there are as few individual parts as possible.

b) solving the problem

This object is achieved by the characterizing features of claim 1. Advantageous embodiments result from the subclaims.

Due to the axial spacing of the first sealing point 4 from the tensioning device 3, it can be designed in the area of the intermediate cover and / or body in such a way that it is elastically deformable between the relaxed and the tensioned state and the elastic restoring force ensures the tightness. In addition, due to the spacing, a second sealing point 5 can be arranged in the area of the tensioning device, so that overall a very high level of security of the seal is provided. Due to the cup-shaped, one-sided open container and matching lid, the sealing points are always closed all round, regardless of whether the basic shape of the container is round or polygonal.

The tensioning device is preferably formed in one piece with one of the container parts, preferably together with the lid, and is preferably not continuous over the circumference, but is provided at several separate locations, for example at four locations distributed by approximately 90 ° in each case.

The tensioning device consists of a radially strutting locking projection, which is preferably formed on the body and preferably consists of a continuous annular flange over the circumference, and a radially inward open recess, which is formed on the locking tabs of the cover for receiving the ring flange as a locking projection.

The latching tabs have a significantly smaller wall thickness in the area of the latching depressions, that is to say the bottom of the latching depression, than to the side next to the latching tabs. Since the radially protruding edge of the lid, which leads to the locking recess, has a relatively large material thickness, which preferably increases radially from the outside inwards, when the locking tabs 33 are bent radially outward to open the clamping device, the locking tabs 33 can preferably be located in the region of the small one Bend the material thickness, that is to say in the region of the groove base of the latching recess, or the circumferential cover edge as a whole in the connecting area axially above the latching recess 32.

Furthermore, the first sealing point is described below in such a way that the sealing surface (groove) in the lid and the sealing web (upper edge of the body wall) are formed on the container, while this assignment is just reversed at the second sealing point (flange).

For one or all of the two sealing points, the assignment of the sealing surface and sealing web to the body or lid can also be reversed. be reversed, so for example the free upper end of the body edge can be V-shaped, in which a suitable projection of the lid could engage.

Due to the high sealing probability of each individual sealing point and thus the high level of sealing reliability of the container due to several separate sealing points and their mobility to one another, the body and lid can be juxtaposed at the sealing points directly, i.e. without the interposition of a special, more elastic sealing material, with the advantage of one Easier recyclability and a reduced risk of contamination of the contents due to detachable components of the sealing material.

By sufficient axial spacing of the sealing points, the distance for diameter and / or length compensation can be used and the sealing probability at both sealing points can thereby be increased. If, in addition, at least one of the sealing points is divided into several partial sealing points, the sealing probability is further increased, even if the z. B. sealing webs of the partial sealing points are not or hardly movable relative to each other.

The following descriptions always only refer to the cross-sectional shapes of the corresponding locations of the lid or body. However, these are - except for the latching tabs - always formed in a circular manner in accordance with the circular, polygonal or free-form shape of the body, that is to say its peripheral walls, when viewed from above.

In a preferred embodiment, the first sealing point consists of the free upper end of the body edge as a sealing web on which a groove formed in the underside of the cover and preferably having a V-shaped cross-section is seated. The diameter of the upper end of the body edge is slightly larger than the diameter of the groove in the lid, so that the axial Pressing on the lid, the flank of the groove presses the body edge radially inwards and possibly deforms it elastically. This groove forming the groove area of the cover goes radially inward into the main part of the cover, the central area over and on the outside in a connecting area, which is parallel to this or obliquely on the outside of the wall, z. B. with increasing distance, is directed downwards outwards.

At the lower end, the connection area merges into a lid edge, which in particular has a fork-shaped or U-shaped cross section with one or more downward-pointing free ends, the sealing webs.

These sealing webs can be pressed with their free ends against an upward-facing sealing surface, which represents the top of a flange projecting outward from the body wall, by means of a tensioning device.

The ring-shaped circumferential sealing surface against which the sealing web or seals press can run horizontally, that is to say exactly perpendicular to the longitudinal direction of the container, generally the axis of symmetry of the body and the cover, or inclined thereto, for example falling radially from the outside inwards, thus with increasing distance in the longitudinal direction with respect to the freely ending edge of the body.

The pressing together of the lid and body, in particular at both sealing points, is effected by a tensioning device, in particular in one piece, for. B. molded on the lid, distributed separately over the circumference, locking tabs as described above.

The locking tabs clamping ring have a radially inward open, equipped with sloping flanks to each other as a recess, the inner surfaces of which move from the bottom of the groove to the open end, that is, in the assembled state from radially inward, increasingly from each other. In the same way, the rear sides facing away from the sealing surface of both the lid edge and the flange are also formed obliquely:

The upward-facing rear of the edge of the lid thus falls obliquely downwards from the inside, while the downward-facing rear of the flange rises obliquely from the inside outwards, corresponding to the inclination of the inner flanks of the locking recess of the clamping ring.

The likelihood of the tight sealing of both sealing points is greatly increased by the mobility of the elements forming the two sealing points either on the side of the cover or on the side of the body.

In practice, the ring flange is arranged 10 mm to 100 mm, in particular 30 mm, under the body edge and projects 10 mm to 50 mm, in particular 20 mm, radially outwards. The circumferential sealing webs, which can be arranged on the ring flange of the body or on the edge of the lid, are 1 mm to 15 mm, in particular 3.5 mm, high and 1 to 10 mm, in particular 3 mm, wide.

c) working examples

Embodiments according to the invention - with different dimensional relationships between the lid and the body edge - are described in more detail in the figures. Show it:

Figures 1: the lid located on the body in the relaxed and in the tensioned state with a large axial extension of the lid and

2: the lid located on the body in the relaxed and in the tensioned state with little axial extension of the lid, Figures 3: a third variant of the container, and

Fig. 4: a perspective view of the closed container.

Figures 1 to 3 each show in section along the longitudinal direction 20, the axis of symmetry 10, body 1 and cover 2 their support against each other, in each case in Figures a and c with loosely placed lid and in Figures b and d with against the body clamped lid. Figures c and d are steps in the area of the latching tabs, figures a and b in the circumferential area in between, as can be seen in FIG. 4.

Common to the designs of FIGS. 1 to 3 is the basic design of the cross-sectional shape of the cover, in particular the edge of the cover, and the upper region of the wall of the body 1: when viewed from above, both the cover and the body are symmetrical with respect to the axis of symmetry 10, which at the same time should define the longitudinal direction 20, so that all-round closed containers are formed in that the only open side of the body can be sealed by the lid. As a rule, the body and lid are rotationally symmetrical.

The wall 7 of the body 1 is preferably smooth on the inside, for easier filling, emptying and cleaning of the inside of the container.

On the outside, axially set back and also radially outwardly spaced from the free-ended body edge 1a, the body 1 has a circumferential ring flange 8 which projects radially outwards and is also lower than the central region of the cover 2. The body edge 1a, that is to say the wall, in particular above the ring flange, can be made somewhat thicker than below the ring flange, but generally not thicker than 3 mm.

The cross-section of the cover 2 in the radial region of the body edge 1a has a U-shape or V-shape with an annular groove 6 which is open at the bottom, that is to say in the direction of the body, and with which the cover 2 is placed on the body edge 1 as the first sealing point 4 can be.

Radially within this U-shaped or V-shaped groove area 2c, the cover merges in one piece into its central area 2d, which is thus lowered relative to the groove area 2c. The radially outer leg of the groove area 2c is extended either in the axial direction or obliquely outwards by means of a connecting area 2b, at the lower outer free end of which the lid edge 2a is in one piece. This is located in the axial direction in the attached state, thus still under the central area 2d of the cover.

Spread over the circumference, a total of 4 latching tabs 33 project further downward in the axial direction from the purely outer end of the lid edge 2a. These serve for locking with the ring flange 8, whereby the cover is held tightly against the body in the locked state.

Furthermore, the cover edge 2a has a downward direction and radially concentric sealing webs 11b, 11c all around the locking tabs 33, which, however, in a preferred embodiment only run concentrically to one another in the area between the locking tabs 33, and in the circumferential area of the locking tabs 33 to form a single sealing web 11b 'are summarized, the radial width of which is preferably the total width of the sealing webs 11b, 11c including their mutual spacing. If the cover is clamped in relation to the body, the sealing should take place at at least the first, preferably two different sealing points 4, 5:

The free-ended body edge 1a in the groove 6 of the lid 2 represents the first sealing point 4. The sealing webs 11b, 11c and 11b 'of the lid edge 2a resting on the top of the ring flange 8 of the body represent the second sealing point is divided over the largest part of the circumference into two part sealing points 5a, 5b by the sealing webs 11b, 11c running concentrically to one another.

Due to the fact that the pressure of the sealing web 11b 'on the ring flange 8 is particularly strong in the area of the locking tabs 33, a single sealing web is sufficient in this area. In the other circumferential areas, the two concentric sealing webs serve to increase the sealing security.

The bracing by means of the locking tabs takes place in that - as can be seen in Figures c and d in each case - the locking tabs 33 have a radially inwardly open locking recess 32, which is arranged directly below the sealing web 11b 'and the shape and dimension of the cross section of the correspond radially free outer end of the ring flange 8, which is preferably not ribbed in this area, but is solid.

As the figures d show, the flanks of the locking recess 32, which, analogously to the sealing surface 12b and the rear side 14 of the ring flange 8, converge towards one another at the outside, on the upper side through the sealing web 11b 'and on the underside through a thickening in the Snap tab 33 formed. The radially inner side of the thickening thus forms an oblique guide surface 35, on which the radially outermost edge of the ring flange 8 slides along when the cover is pressed on from above, thereby bending the latching tab 33 radially outward until the lower thickening snaps over the ring flange 8 and the latter engages in the locking recess 32 of the locking tab 33. In this state, both presses the sealing web 11b 'in the area of the latching tabs 33 and in the other circumferential areas, the sealing webs 11b and 11c from above onto the annular horizontal sealing surface 12b, which represents the top of the ring flange 8. The thinner, free end 34 of the latching tab 33 protruding downward beyond the thickening serves - also because of the sufficient distance to the outside of the wall of the body 1 - for reaching behind with one finger for the radial outward pulling and thus releasing the cover 2.

It is important, among other things, that the lid edge 2a with its sealing webs 11b, 11c is relatively stable in itself. The same applies to the groove area 2c, which can have a wall thickness at least twice that of the normal wall thickness, for example, of the central area 2d, in particular in the area of the groove base, and can also be reinforced by an extension 2e on the rear side of the groove, i.e. pointing upwards can.

In contrast, the lid edge 2a is quite movable with respect to the groove area 2c, for example due to the reduced material thickness in the course therebetween, in particular at the transition between the groove area 2c and the connection area 2b and the connection area 2b and the lid edge 2a.

As a result, for example, the lid edge 2a can be bent slightly downward relative to the connection area or the entire connection area can be pressed somewhat radially inward relative to the groove area.

It is also important that the body edge 1a, in particular the entire piece of the wall 7 from the flange 8 to the free end, is sufficiently stable, and in particular the wall thickness is thicker than the rest of the wall 7, and thus the body edge 1a its free end can be bent radially inwards or outwards, but only with relatively great effort. The outwardly directed flange 8 is also very stable, and in particular is stabilized by webs 15 running radially outward on the underside.

The flange 8 preferably has a horizontally extending upper side as a sealing surface 12b, while the lower side 14 slopes away from the outside inwards. In the area in which the latching tabs 33 of the cover 2 are placed, the cross-section of the ring flange 8 is preferably solid, in the other circumferential areas it is formed by ribs 15 which are radially spaced over the circumference.

In addition, the ring flange 8 can be stiffened by vertical stabilizing webs 21 which protrude outwards from the wall of the body 1, as can best be seen in FIG. 4, and then merge into the ring flange 8 at the upper end, but freely run out at the lower end. The stabilizing webs 21 protrude radially outward only to such an extent that they do not hinder reaching around the outer free end of the ring flange 8 by the latching tab 33, and are preferably also in the areas of the circumference which serve to place the latching tabs 33 in see the peripheral areas in between, usually evenly distributed.

Figures 1 to 3 differ in the relation of the distances A and B to be defined below for the lid and body:

These distances to be measured in the longitudinal direction 20, that is to say parallel to the axis of symmetry 10, are defined as follows in the unstressed idle state of the body or cover: Distance A in the cover is the axial extent between the base of the groove 6 and the sealing web 11b which projects the most downward , 11c of the lid edge 2a.

For the body, distance B is the distance between the free upper end of the body edge 1a and the upward-facing sealing surface 12b of the flange 8. In all cases, however, after tensioning of the tensioning device 3, the cover 2 lies tightly in the groove 6 of the cover 2 at the first sealing point 4. This sealing can be supported by the second sealing point 5 on the ring flange 8.

1, distance B is somewhat larger than distance A, this is just different in FIG. These different relations and the resulting situations can be chosen deliberately or can arise on the basis of manufacturing tolerances in the production of the cover or body, which is usually produced by injection molding.

If the lid spacing A is smaller than the body spacing B, as in FIG. 1, when the lid is loosely placed, its groove area 2c sits with a flank or the groove bottom of the groove 6 on the free, upward-facing end of the body edge 1a without the downward-pointing sealing webs 11b, 11c of the cover edge 2a reach the upward-pointing sealing surface 12b of the flange 8, which is generally at right angles to the axis of symmetry 10.

If - due to differences in diameter - the body edge 1a does not lie in the groove base of the groove 6 of the cover 2, but bears radially inward or preferably outwardly at one of the flanks of the groove 6, the distance between the sealing webs 11b ', 11b, 11c of the lid edge 2a and the flange 8 at the second sealing point 5 may be even larger.

As Fig. 1 a shows, the lower free ends of the concentrically rotating

Sealing webs 11b, 11c not at one height, but because of a slightly outward inclined position of the lid edge 2a and also a slightly downward outward inclined position of the connecting area 2b of the Cover 2, the radially inner sealing web 11b extends somewhat further towards the sealing surface 12.

By engaging the locking tabs 33, ie increasing penetration of the ring flange 8 into the locking recess 32 of the locking tabs 33, the move

Because of their inherent elasticity, latching tabs 33 radially inward as far as possible and also increasingly downward because of the oblique underside of the ring flange 8. As a result, the lid edge 2a is moved radially inward on the one hand and, on the other hand, simultaneously and / or instead pressed axially against the sealing surface 12b of the flange, that is to say downwards. This is due to the mobility of the lid edge 2a relative to the rest of the lid 2, in particular with respect to the groove area 2c, and in particular due to a

Bending or twisting of the individual parts of the cover by the transitions 17 and 18 on both sides of the connection area 2b, which are provided with a smaller wall thickness.

Simply because of the radial inward movement of the lid edge 2a and the approach of the transition area 2b from the inclined position to the parallel position to the axial direction, at least one of the sealing webs 11b, 11c - in the tab area of the sealing web 11b '- reaches the sealing surface 12b with its free end of the flange 8, whereby an additional seal is achieved at this second sealing point 5. 1b, the radially outer sealing web 11c lies with its entire end face against the sealing surface 12b, while the radially inner sealing web 11b has only line contact with the sealing surface 11b.

Due to the axial movement of the lid edge 2a, the groove 6, in particular its contact point on the flank, is also pressed against the body edge 1a at the first sealing point 4, and thus an increased tightness is also achieved at the first sealing point 4. If the body edge 1a has a slightly larger diameter than the groove base of the groove 6, the body edge 1a is additionally deformed somewhat radially inwards when the cover 2 is pressed on at its free end, such as, for. B. in Fig. 1b, so that the elastic restoring force of the body edge 1a in the relaxed rest position additionally increases the tightness at this first sealing point 4.

If, in addition, the sealing surface 12b does not run perpendicular to the axis of symmetry 10, but rather an increasing distance from the radially outside to the radially inside, the contact point possibly moving in the direction of the groove base and the edge 1a being slightly radially deformed, taking up from the upper free end of the body edge 1a Due to an inclination, as shown in dashed lines in Fig. 2b, this axial bracing effect is further increased.

In contrast, in Fig. 2a, the distance A of the lid 2 is greater than the distance B of the lid 1. When the lid 2 is loosely placed, the lid edge 2a thus lies on the sealing surface 12b of the flange 8, and because of the weight of the lid this causes the edge of the cover 2a to bend slightly around the transition 18 to the connection region 2b, so that only the radially inner sealing web 11b is in contact and the radially outer sealing web 11c will be slightly raised from the sealing surface 12b.

At the first sealing point 4, the groove base of the groove 6 will furthermore not reach the free end of the edge of the cover 1a, unless this is not aligned in the radial direction with the base of the groove, but is radially outward - which is the preferred design - or offset on the inside and is therefore already on one of the flanks of the groove 6.

By placing the clamping device 3 in the form of the latching tabs 33, the lid edge 2a is initially displaced radially inward along the sealing surface 12b, and in addition thereby also causes both sealing webs 11b, 11c of the lid edge 2a on the sealing surface 12b of the web 8 of the body 1 rest. As a result of this displacement radially inward, the connecting region 2b adjoining the lid edge 2a is also displaced radially inward and, as a result, the body edge 1a bears at least on the radially outer flank of the groove 6 - possibly with radial elastic deformation of the body edge 1a inward -, and thus also occurs at this first sealing point 4.

Another possibility is shown in FIG. 3:

While in the solutions of FIGS. 1 and 2 the wall thickness of the body edge 1a was significantly less than the width of the groove base of the groove 6 in the lid 2, the reverse is true for the solution according to FIG. 3:

The wall thickness of the body edge 1a, at least at its free end, is so large that it cannot penetrate into the groove 6 to such an extent that the bottom of the groove is reached.

The body edge 1a thus already lies with its end region on both flanks of the groove 6, while the sealing webs 11 of the lid edge 2a do not yet reach the sealing surface 12b of the flange 8. Only by fitting and latching the latching tabs 33 according to FIG. 3d is the lid edge 2a drawn radially inwards, but above all in the axial direction downward onto the sealing surface 12b, on which the sealing webs 11b, 11c now rest. As a result of this axial bracing, the free end of the body edge 1a is also pushed further into the groove 6, and this is also widened slightly, depending on the stability of the groove area 2c. This leads to a slight deformation of the central area 2d of the cover to a spherical shape on the radially inner side, and to an inclined position of the outer leg of the groove area 2c and of the connecting area 2b on the radially outer side.

However, this is compensated for by radially inward displacement of the lid edge 2a by latching the latching tabs, and the existing movement Possibility of the lid edge with respect to the groove area 2c due to the longitudinal extent of the connection area 2b and / or the mobility due to the thinned transitions 17 and / or 18 of the connection area 2b with respect to the adjacent areas.

In the perspective view of the assembled container, that is, a cover 2 placed on the body 1 with snap-in latches 33, the stabilizing webs 22 on the cover 2 can also be seen, which extend radially and are distributed over the circumference between the highest elevation of the groove area 2c Cover 2 and the lowered central area 2d. These stabilizing webs 22 are also formed in one piece with the cover 2, as are the latching tabs 33. The same applies to the stabilizing webs 21 of the body 1.

In addition, Fig. 4 shows in the broken area of the lid 2 and Figures 1a, 1b that the body edge 1a can be supported on the outside by additional stabilizing webs 23 which run radially and at an angle between the outside of the body edge 1a and the upward directed sealing surface 12b of the ring flange 8 are. The radial extension outwards and upwards in the direction of the free end of the body edge 1a must be limited so that these stabilizing webs 23 do not impede a complete snap-on of the cover 2, including the snap-in tabs 33.

LIST OF REFERENCE NUMBERS

1 body 25 12a, b sealing surface

1a body edge 13 back

2 lid 14 rear

2a lid edge 15 webs

2b connecting area 16 floor

2c groove area 30 17 transition

2d central area 18 transition

2nd extension 19 Spanut

3a, 3b clamping device 20 longitudinal direction

3a groove 21, 22, 23 stabilizing bars

4 first sealing point 35 31 locking projection

5 second sealing point 32 locking recess

5a, b partial sealing point 33 locking tabs

6 ring groove 34 free end

7 wall 35 guide surface 8 ring flange 40 9 10 axis of symmetry A = cover spacing

11a, b, c sealing web B = body distance

Claims

1. Container with a body (1) and a lid (2) and a tensioning device for tightly tightening the lid (2) relative to the body (1), characterized in that - at least in the tensioned state, the lid (2) relative to the body (1) on at least one ring around the axis of symmetry (10) of the Continuous first sealing point (4) surrounding the container, and the tensioning device (3) is axially spaced from the first sealing point (4). 2. Container according to claim 1, characterized in that the clamping device (3) is integrally formed on the lid (2). 3. Container according to one of the preceding claims, characterized in that the clamping device (3) consists of a plurality of clamping devices (3a, 3b, 3c, ...) distributed over the circumference and spaced apart. 4. Container according to one of the preceding claims, characterized in that the latching device consists of a radially projecting, in particular outwardly projecting, latching projection (31) and cooperating latching recess (32), the flanks of which are designed such that the cover (2) is pulled axially against the body (1). 5. Container according to one of the preceding claims, characterized in that the latching projection (31) on the outside of the body (1) is arranged set back from the free end of the body (1) and the intermediate cantilevered body edge (1a) is dimensioned so that it is elastically deformable through the tensioned cover (2), in particular only elastically deformable in the radial direction. 6. Container according to one of the preceding claims, characterized in that the locking projection (31) has a continuous circumferential flange (8) distributed separately over the circumference in the form of locking tabs (33). 7. Container according to one of the preceding claims, characterized in that the radially outwardly projecting annular flange (8) at several locations distributed over the circumference, at least in the subdivision grid of the latching tabs (33), by projecting radially outwards in the longitudinal direction (2 ), the direction of the axis of symmetry (10) of the container, extending stabilizing webs (21) which merge in one piece into the ring flange (8) is reinforced. 8. Container according to one of the preceding claims, characterized in that a second circumferential, annular axis of symmetry (10) of the container circumferential, in particular continuous, sealing point (5) spaced from the first sealing point (4) is present. 9. Container according to one of the preceding claims, characterized in that at the sealing points (4) or (5) or the partial sealing points (5a, 5b) each have a sealing web (11) with its outer surface, in particular with a linear shape Touch, presses against a sealing surface (12) and can be moved along this sealing surface (12) due to the tensioning by means of the tensioning device. 10. Container according to one of the preceding claims, characterized in that at the first sealing point (4) the sealing web (11a) is the freely ending body edge (1a) and the sealing surface (12a) has a cross-sectionally V-shaped annular groove (6) the underside of the cover (2). 11. Container according to one of the preceding claims, characterized in that the body (1) and the lid (2) each consist only of a single material, in particular plastic, in particular the same plastic. 12. Container according to one of the preceding claims, characterized in that the sealing points (4) and / or (5) are divided into partial sealing points (5a, 5b). 13. Container according to one of the preceding claims, characterized in that at the sealing point (5), the sealing surface (12) is arranged transversely to the axis of symmetry (10), outside the wall (7) of the body (1) arranged on the radially after the annular surface is the externally facing ring flange (8) and the sealing web (11b) is an annular circumferential sealing web formed in one piece with the outer lid edge (2a). 14. Container according to claim 13, characterized in that the lid edge comprises two radially spaced, concentrically arranged sealing webs (11b, 11c) which rest on the same sealing surface (12b) in the clamped state, in particular the concentric with each other arranged sealing webs (11b, 11c) in the area of the locking tabs (33) are combined into a single sealing web (11b '), the radial extent of which is at least the sum of the radial extensions of the sealing webs (11b) and (11c) in the circumferential area between the locking tabs (33 ) corresponds. 15. Container according to one of the preceding claims, characterized in that the lid edge (2a), at least in the connection area between the sealing webs (11b, 11c), is so stable that no significant deviation from the ring shape of the Lid edge (2a) can be effected. 16. Container according to one of the preceding claims, characterized in that the sealing surface (12b) extends perpendicular to the axis of symmetry (10). 17. Container according to one of the preceding claims, characterized in that the sealing surface (12b) at an acute angle, in particular with a sealing surface (12b) pointing towards the open end of the body (1), radially from the outside inwards to the bottom of the body ( 1) descending, is arranged. 18. Container according to one of the preceding claims, characterized in that the rear side (13) of the lid edge (2a) pointing away from the flange (8) and the rear side (14) of the flange (8) pointing away from the lid correspond to the inner flanks of the annular groove ( 3a) of the clamping ring (3) are conically shaped. 19. Container according to one of the preceding claims, characterized in that the conical rear side of the flange (8) of the body (1) is formed at least by webs (15) of the flange (8) distributed over the circumference, the webs (15) in particular not being present at the circumferential locations provided for receiving the locking tabs (33). 20. Container according to one of the preceding claims, characterized in that the latching tabs (33) have a downwardly projecting free end, which is spaced from the outside of the body (1), in particular so far apart that it can be gripped with a finger can. 21. Container according to one of the preceding claims, characterized in that the latching tabs (33), in the radially inward side of which the latching recess (32) is formed, in the region of the bottom of the latching recess (32) has a lower material thickness than on both sides thereof , 22. Container according to one of the preceding claims, characterized in that the lid (2), viewed in cross section, radially from the inside outwards from a plate-shaped central area (2d), a U-shaped, axially outwardly bulging groove area (2c), one at its radially outer free end there is an annular connecting area (2b) and the adjoining lid edge (2a), which are formed in one piece with one another and wherein the transition between the connecting area (2b) to at least one of the adjacent areas has a smaller wall thickness than that other areas. 23. Container according to one of the preceding claims, characterized in that the lid edge (2a) is arranged radially outside the connection area (2b). 24. Container according to one of the preceding claims, characterized in that the connecting region (2b) extends axially. 25. Container according to one of the preceding claims, characterized in that the free end of the body edge (1a) as a sealing web (11a) of the first sealing point (4) from the sealing surface (12b) of the second sealing point (5) an axial body distance (B) takes, which is slightly larger than in the relaxed state of the lid, the lid distance (A) of the bottom of the groove of the annular groove (6) from the free end of the sealing web (11) or (11b) and (11 c). 26. Container according to one of the preceding claims, characterized in that the diameter of the body (1), measured from the center of the wall to the center of the wall at the free end, that is to say at the edge of the body (1a), deviates from the diameter of the annular groove (6) of the cover (2). , measured from the center of the groove base to the center of the groove base, and the diameter of the body is preferably larger than the diameter of the ring groove (6), so that when the cover is placed without tension, the cover with its outer ring groove flank on the body edge (1 a ) sits on. 27. Container according to one of the preceding claims, characterized in that the wall thickness of the body (1) at the body edge (1a), in particular from the flange (8) to the free end, is greater than between the flange (8) and the bottom ( 16) of the body. 28. Container according to one of the preceding claims, characterized in that the annular groove (6) has an intermediate angle between its outer flank (6a) and its inner flank (6b) of 5-50 °, in particular 10-30 °. 29. Container according to one of the preceding claims, characterized in that in the relaxed state, the body distance (B) from the top of the ring flange (8) to the free end of the body edge (1a) is less than the lid distance (A) of the groove base of the annular groove (6) up to the radially upper flank of the locking recess (32) of the locking tabs (33) in the area of the locking tabs (33) and thus the free end of the sealing web (11b) or (11c) in the area between the locking tabs (33) ,