EP1268295A1

EP1268295A1 - Plastic container comprising a locking lid and a sealing rib located inside the container

Info

Publication number: EP1268295A1
Application number: EP01913593A
Authority: EP
Inventors: Frank Diesterbeck
Original assignee: Jokey Plastik Gummersbach GmbH
Current assignee: Jokey Plastik Gummersbach GmbH
Priority date: 2000-04-01
Filing date: 2001-02-08
Publication date: 2003-01-02
Anticipated expiration: 2021-02-08
Also published as: PT1268295E; ATE281367T1; DE50104395D1; FR2808509A3; EP1268295B1; WO2001074680A1; US6845877B2; FR2808509B3; US20020175172A1; DE20006095U1; DE10191221D2; AU2001239162A1; ES2232603T3

Abstract

A plastic container with a snap lid and with a snap element is provided on the upper edge region of the container for the lid to snap onto, where the lid has a circumferential sealing web projecting downwards that contacts the inside of the container, where at least one projection that extends in an essentially radial and essentially vertical direction is provided on the lid radially inside the sealing web. To provide a plastic container with snap lid, which fulfils the special demands imposed on leak-proofness, while simultaneously providing high load-bearing capacity, the vertical extension of the area of the projection adjacent to the sealing web is small relative to the total vertical extension of the projection. The inward-facing projection can be located on an inside circumferential edge integrally molded on the sealing web. In addition to the sealing web, another circumferential seal is provided in the region of the top edge of the container.

Description

Plastic container with snap-on lid and sealing web arranged on the inside of the container

The invention relates to a plastic container with a snap-on lid and with a catch arranged on the upper edge region of the container for latching fastening of the lid, the lid having a circumferential sealing web which projects downward and comes into contact with the inside of the container, with the lid being radially inner at least one projection is provided to the sealing web, which extends essentially in the radial and essentially in the vertical direction.

Plastic containers of this type are used for the transport of various goods, in particular also in the industrial area and in the food area, and have been retained many times. When transporting liquids or low-paste materials, however, there is still the problem of sufficient tightness of the plastic containers. This is particularly the case when transporting goods which are in flight or are critical for other reasons, such as, for example, oils, in particular mineral oils. In these cases, particularly high demands must be placed on the tightness of the plastic container, which are not satisfactorily solved in previously known plastic containers, even if many attempts have been made to achieve adequate tightness by suitable profiling of the container edge and the lid. To increase the rigidity of the horizontal lid surface, it is widely known to arrange projections directed from the circumferential inner rim of the lid to the main axis of the container, ie the longitudinal axis of the container running through the center of gravity of the container. If appropriate, these projections or a cover edge running around the inside of the container are provided on the inside with stiffening ribs which are supported on the inner sealing web. It has been found, however, that a reliable seal of the container cannot always be achieved with this construction. This applies in particular if the side walls of the projections or stiffening ribs, for example ring-shaped or box-shaped projections, exceed a certain thickness for high loads.

The invention has for its object to provide a plastic container with a snap-in lid that meets the special requirements for tightness with a high load capacity.

D e task is solved by a plastic container with a snap-in lid, in which the vertical extension of the area of the projection immediately adjacent to the sealing web is small against the entire vertical extension of the projection and / or against the vertical extension of a radially inner and wall region extending essentially perpendicular to the projection. The projection can be designed in the form of a web or with spaced side walls, it can also be designed as a stiffening rib of a projection and / or an edge running around the inside. The rib can be designed as an outer rib extending outward from the cover, preferably as an inner rib extending from the cover to the interior of the container. The wall region adjoining radially on the inside can represent, for example, the radially inner boundary wall of a box-like projection or an edge running around the inside. The vertical extent of the areas formed on the sealing web can thus be small, for example, against the height of the projections or against the height of the interior ribs or side walls of the side facing the interior of the container. Thus, if the height of the inner ribs is significantly smaller than the height of the protrusions, the inner ribs can have a substantially constant height. Preferably, however, the height of the inner ribs on the side facing away from the container wall corresponds to that of the projections, so that the height of the inner ribs decreases radially outward. The total height of the protrusion corresponds to the height of the protrusion over its radial extent.

The vertical extent of the regions of the projections formed on the sealing web is thus also small compared to the height of the sealing web, in particular against its height extending below the molding. The height of the projection can be less than 3/4, e.g. less than 1/2 or less than 1/4 of the height of the sealing web and e.g. lie in the area of the top wall thickness.

Due to the fact that the height of the areas of the inner ribs or side walls that are molded onto or facing the sealing web is only comparatively small, the sealing web can be shaped with high accuracy and reproducibility, material and / or shape changes in the area of the sealing web, such as, for example due to binding errors, material shrinkage and the like can be reduced to a minimum. It has been found that material stresses through the formed vertical ribs or side walls can extend vertically beyond the shaping areas and, if appropriate, into the sealing area of the web. As a result of the measure according to the invention, the molded-on projection can be spaced a distance from the region of the sealing web which brings about the highest level of tightness, so that this sealing region is essentially free of molding influences by the projection. The sealing web therefore lies very evenly against the inner wall of the container due to the measures according to the invention over the entire circumference even with a large thickness of the inner ribs or side walls of the projections, as a result of which the container is tightly sealed. The height of the projections, such as the inner ribs or side walls on the side facing the container wall, can be less than 3/4, for example 1/2 or 1/4 of the height facing the container center or the total height or the vertical extent of the radially inner side and itself wall area extending substantially perpendicular to the projection. The inner ribs or side walls preferably adjoin the sealing web only at points. If the projection is directly formed on the sealing web, the vertical distance of the lower edge of the projection adjoining the sealing web from the sealing region of the sealing web (in particular the region with the greatest sealing effect) can be 1/4 - 1/2 or more the height of the projection. The sealing area, in particular the area with the greatest sealing effect, can be at the height of the projection, for example a reinforcing rib or a side wall of a projection, for example if the lower edge of the projection drops towards the interior of the container or the projection is spaced from the sealing web.

According to a particularly preferred embodiment, the at least one protrusion or the side walls or inner ribs of the same is radially spaced from the sealing web arranged on the container side, so that material stresses arising due to material accumulations which are not uniformly distributed over the circumference of the container are not transmitted directly to the sealing web. Are e.g. ring-shaped or box-shaped, e.g. cuboid or pπsmenformigen protrusions, the side walls or inner ribs of the protrusions are connected to the lid only on their upper and radially inner sides. It was found that sufficient stability of the protrusions can be achieved without disturbing flow onto the sealing web. The inner ribs can optionally also support the inner, essentially horizontal ceiling area and can be formed on the underside of the cover.

The sealing web can have a linear or flat contact area with the inner wall of the container. The sealing The contact area of the sealing web, which is preferably elongate in cross section, is preferably provided below the areas of the cover formed on the sealing web, such as the inner ribs or side walls of the projections, particularly preferably in the area or at the lower free end of the sealing web. As a result, the contact area can have a certain flexibility, which is often no longer sufficient if, for example, the inside surface of the lid or the projections are integrally formed with the top of the lower area of the sealing web, which impairs the flexibility of the sealing web and also, for example, when stacking forces absorbed by containers from the projections have been transmitted to the lower region of the sealing web, as a result of which its sealing function can be impaired. The contact area sealingly against the inner wall of the container can extend over a multiple of the thickness of the cover wall, for example about 4 times the thickness thereof, without being limited to this.

The sealing web advantageously extends, starting from the molded-on ceiling areas which extend radially inward to the inside of the lid, over a vertical height which corresponds to a multiple of the lid wall thickness, preferably 2 to 5 times the lid wall thickness or above. The sealing web is preferably free of radially extending projections over this height. The wall thickness of the sealing web can be in the range from 0.5 to 1.5 of the cover wall thickness, e.g. correspond approximately to this.

The sealing area of the sealing web, for example the lower end thereof, is preferably in the region of the vertical height of the cover protrusions, for example in the region of half the height or the lower third of the protrusions.

The cross section of the protrusions can be, for example, triangular or quadrangular, possibly also at an oblique angle, the upper and / or lower edge of the side walls of the protrusions or the inner ribs dropping towards the interior of the container (preferably with an incline of <15 °, e.g. approx. 5 °) or run horizontally. The radially inner end wall of the projections or inner ribs can run vertically or inclined.

According to an advantageous embodiment, the at least one projection can be formed on the upper side of an area which extends radially inward from the sealing web and slopes downwards towards the interior of the container. The protrusion can be web-shaped or box-shaped.

A circumferential edge is preferably formed on the inside of the sealing web, on which the projections projecting toward the interior of the container are molded radially inwards. The edge can be inclined downward toward the interior of the container or can run essentially horizontally without being limited to this. Preferably, the peripheral edge extends in the radial direction over one or more wall thicknesses of the same, e.g. about 2 - 3 wall thicknesses starting from the inside of the sealing web. When looking at the cover from the underside there is a circumferential groove with e.g. approximately trapezoidal or triangular cross-section and inward widenings. The inner ribs or side walls of the projections are thus spaced in the radial direction from the sealing web or the upper edge of the cover. This ensures high rigidity of the interior of the cover, e.g. for stacking containers, achieved with high tightness of the container.

The inner stiffening ribs can be used with several separate projections, e.g. essentially box-shaped projections as well as an annular circumferential projection which forms an rim-shaped lid edge

The projections can be formed on the top edge of the lid. Advantageously, the top of the protrusions is spaced apart from or below the sealing area of the top edge of the lid, so that a further step shoulder stands. This avoids a molding to the height of the sealing area on the inside of the container, which can lead to material stresses or changes in shape, for example due to shrinkage processes. If the sealing area on the upper edge of the container extends over a vertical area, the upper side of the projections can also be arranged approximately at the height of the lower end of the sealing area. This applies both when the sealing area is only shown by direct contact surfaces of the lid and bucket, and when a flexible seal is provided.

When the cover is attached, a shoulder is preferably formed in the container wall immediately below the sealing web. The sealing web can be seated on the shoulder when the lid is in place, but can also be spaced apart from it in such a way that, when additional containers are stacked up or when external force is exerted, the underside of the web is supported on the container shoulder. The step of the inner wall of the container, which is arranged below the sealing web of the cover, can be arranged approximately at the height of the catch or a reinforcing step or at a distance from one or a few thicker walls of the container.

In order to increase the reliability of the container closure, an area protruding upwards beyond the lower edge of the same can be provided on the inner wall of the container, radially adjacent to the circumferential sealing web. This area is preferably molded onto the inner container shoulder. For this purpose, individual projections or webs distributed over the circumference can be provided; this area is preferably also designed as a circumferential rib. The height of this rib, which prevents the sealing web of the cover from shifting in anticipation, is preferably smaller than the thickness of the container or the sealing web, without being restricted to this. The areas of the container projecting upwards can be spaced apart slightly or with or without pretensioning on the side of the sealing web of the cover. The sealing web of the lid can also be in the Press fit between the radially inside and outside adjacent container areas can be arranged.

A further sealing area between the container and the lid is preferably arranged in the region of the upper edge of the container. The sealing area can have a seal made of a material of higher elasticity than that of the lid and the bucket, in particular made of a rubber material. The seal can be integrally formed on one of the parts, thereby avoiding positional tolerances and also when subjected to force, e.g. in the case of falling containers, the seal is always immovably arranged on the component. The seal is preferably made by spraying, e.g. in injection molding, molded so that glue spots or the like are avoided. The seal can also only be held in a non-positive and / or positive manner, e.g. be inserted in an annular groove. The sealing area in the area of the upper edge of the container can also be formed directly by contact areas of the lid and bucket.

The seal is advantageously integrally formed on the cover, the width of the seal being larger than the wall thickness of the upper container edge. The seal can have an essentially horizontally running sealing area; e, two or more different sealing areas can be provided, which can differ in terms of their contact width, material thickness or other properties. The sealing areas can merge into each other or be radially or axially spaced apart.

The seal preferably has two adjacent sealing areas which have a different inclination and can be sealingly applied to areas of the container edge with a different inclination. For this purpose, the seal can in particular have a U-shaped, V-shaped or L-shaped cross-section or other profiles, the sealing areas being able to be arranged on areas of the seal facing one another, but possibly also, for example, on a convex area. The seal is advantageously arranged in a circumferential groove of the cover which surrounds the edge of the container, the seal being able to extend over the entire width of the groove and thereby being additionally secured against lateral displacement. The sealing web on the inside of the container can be designed as an extension of the inner leg of the groove

Preferably, the seal in the closed state of the container has a substantially horizontal area which can be sealingly applied to the upper edge of the container edge, and a radially inner region which is preferably inclined downwards and can be sealingly applied to the inside of the upper container edge. When the container is set up, the downwardly inclined sealing area can extend essentially vertically or at an incline, the two sealing areas being able to enclose an angle of 90 ° -135 ° or more. Preferably, the container edge also has a horizontal sealing area and a radially inner bevel or chamfer for engaging the vertically or obliquely arranged sealing area. As a result, forces are always absorbed in the area of the flexible seal even when there is a lateral force acting on the sealing area, so that there is a high degree of leakproofness.

The seal can have one or more circumferential sealing webs protruding towards the container edge, which come into contact with a container area, in particular the upper edge of the container. The edge of the container can be flat or provided with one or more circumferential ribs, which can form a groove in pairs, into which one or more sealing webs at least partially engage. The structuring of the seal and the container edge that comes into contact with one another can also be incompatible, so that elevations of the seal do not lie opposite the depressions of the container edge but come into contact with elevations of the container edge, for example in the flank region thereof. This results in a non-congruent toothing, which has a high and reliable tightness ensured. The height of the sealing webs is preferably smaller than the thickness of the container wall, for example 1/2 to 1/5 of the same or smaller, without being restricted to this.

The above statements in the geometry of the seal, the formation of sealing webs, etc. also apply correspondingly to a sealing area formed on the lid and the container, in which areas of the lid and container come into direct contact with one another.

On the area of the container outer wall adjacent to the upper edge of the container and sloping outwards, webs projecting radially outward can be formed, which can be designed as circumferential ribs, the radial extent of which is smaller than the thickness of the container wall. These ribs can consist of the same material as the container wall and essentially serve to reduce the friction when the cover is put on, and they only have a subordinate sealing function. Two or more vertically spaced circumferential ribs can also be attached. When the lid is in place, the ribs are preferably free of play but without any significant pretension, as a result of which the lid is positioned exactly in the sealing region of the upper edge of the container, or are spaced apart with little play, without being restricted to this.

To stabilize the sealing area, one or more radially projecting reinforcing steps are formed, preferably on the outside, on the edge of the container on the side of the catch facing and / or facing away from the top of the container. The reinforcement step preferably runs radially around the container, it can also be subdivided and consist of a plurality of reinforcement areas. One or more reinforcing ribs can also be formed on the side of the catch e facing the upper edge of the container and on the opposite side. The thickness, ie height and / or width, of the reinforcing rib can be in the region of the wall thickness of the container or above. By arranging the reinforcement rib adjacent to the flexural The sealing area in the area of the upper edge of the container is particularly stabilized. The cover preferably lies on the radially outer side of the reinforcement rib with or without pretension, as a result of which forces acting laterally on the cover are absorbed directly by the reinforcement rib. For this purpose, the radial outside of the reinforcing rib can have a flat area. The distance between the reinforcing rib and the catch or between them can be designed to engage the catch edge of the cover. If the reinforcing ribs are arranged directly on the container wall, forces exerted on the container wall are also absorbed by the inner sealing web. The same applies to the locking edge with sufficient rigidity.

The latching of the lid is advantageously unchanged even after the container has been opened once, i.e. The locking area and sealing area are not interrupted by a weakening of the material, which serves as an original seal or in which the cover area is to be removed or folded down partially or completely to open the container.

The inner lid surface covering the container opening, which can serve as a stacking surface for containers, is preferably arranged approximately on the height or below the lower edge of the sealing web on the inside of the container. As a result, the inner surface of the cover when subjected to force, e.g. when containers are stacked, forces are largely decoupled from the sealing web.

Furthermore, the inner surface of the lid is preferably arranged approximately at the height or below the outer latching edge or a radially projecting reinforcing rib. Since the lid is also supported on the outside by the latching edge or by the reinforcing rib, uniform force distribution and thus greater reliability with regard to the tightness of the container are obtained with lateral but in particular with vertical application of force on the lid. The sealing region of the sealing web on the container side is particularly preferably arranged approximately at the level of the outer latching edge or an outer stiffening rib. The latching edge of the container is preferably associated with an latching edge of the lid, which merges into the lid region that overlaps the upper edge of the container, so that effective force transmission is ensured. In this case, the sealing web is preferably set outwards in order to bear against the container inner side under the action of force, the inner wall of the container in the contact area extending essentially perpendicularly or slightly inclined outwards. This results in a particularly high level of tightness of the cover, since the upper edge region of the container is at least approximately symmetrically constrained on the outside by the latching edge of the cover and on the inside by the sealing web, which force the container edge in opposite directions.

The inside upper edge of the container can be provided with a chamfered area which facilitates the insertion of the sealing web and can also be designed as a sealing area, e.g. for creating a flexible seal or directly a sealing area of the cover. The angle between the bevelled upper edge and the vertical is acute, i.e. is less than 45.

The lid may have an outward-pointing slide bevel, which may adjoin the upper edge of the lid or an area below it. The sliding slope can end radially outwards with the latching edge of the cover or protrude beyond it, preferably it extends radially beyond areas projecting outwards from the container wall.

The upper edge of the container preferably has a circumferential edge region which projects radially outwards and is drawn downwards, on which the catch is integrally formed. A reinforcement rib molded outwards above the notch can also be integrally formed on the circumferential edge of the container, whereby this is also reinforced, and / or above the circumferential edge area directly on the container wall. By means of the edge region which is pulled downwards and is spaced apart from the container wall, the latching region is decoupled by force from the sealing region of the sealing web on the inside of the container and on the upper edge of the container.

Preferably, the peripheral edge region drawn down is attached to the upper edge of the container, i.e. at the height of the sealing area or at a distance of a few wall thicknesses, e.g. em or two without being limited to that.

The container preferably has a radially outwardly projecting, downwardly drawn edge region which is arranged below the cover placed on the container and extends radially to the cover or also beyond. This circumferential edge region can be formed separately on the container wall and in this case end with the lower edge of the circumferential edge region having the latching edge or be spaced apart from it in height. This peripheral edge region is preferably designed as a continuation of the edge region having the latching, i.e. as a continuation downwards and outwards. The lower edge of the lid can sit on this edge area with little or no preload or have a slight play relative to it, for which purpose a radial constriction can be provided to partially or completely accommodate the lower edge of the lid.

The cover surface blocking the container opening can be arranged at a height or below the inner sealing area, preferably at a height or below the locking edge.

A pouring spout can be attached to the lid, which is preferably arranged approximately on a quarter of the diameter of the lid surface, which makes it practical to use of the bucket when pouring a liquid.

The invention is described below by way of example and explained using the figures as an example. Show it:

1 is a partial view of a container according to the invention with a lid and a stacked further container n sectional view,

2 shows a detailed view of a container with a lid according to FIG. 1,

Fig. 3 is a detailed view of a container according to Fig. 1 in

Sectional view.

Fig. 4 is a plan view of a container with a lid

Fig. 1

5 em stacking scheme of lids according to FIG. 1,

6 shows a detailed view of a container with a lid according to a further embodiment,

7 em stacking scheme of lids according to FIG. 6,

8 shows a detailed view of a cover according to a further embodiment,

9 shows a detailed view of a cover after a modification of the cover according to FIG. 6.

Fig. 1 shows an injection molded plastic bucket 1 with a snap-on lid 2, with a flattened area being provided on the upper edge 4 which closes the outer wall 3 of the bucket. At the upper edge 4 there is an encircling and radially outwardly projecting edge 5, to which an outwardly projecting catch edge 6 is formed, which is surrounded by a circumferential catch edge 7 of the cover with a hook-shaped against the lead.

The area of the lid 2 assigned to the upper edge 4 of the bucket is designed in the shape of a groove or a groove, the outer flank 8 of the groove 34 abutting laterally on the two vertically spaced peripheral ribs 9 of the bucket. The radial extension of the ribs 9 is significantly less than the wall thickness of the bucket, here about e third of the same. Due to the rounded upper edge of the rib 9 and the narrow width of the ribs, the lid can be easily pushed onto the bucket even when the lid is tightly attached to the side of the bucket. The ribs 9 are arranged at the height of the section 12 of the seal, the lid being able to rest against the outer wall of the bucket with little or practically no preload n, even in the absence of these ribs, whereby the seal is precisely positioned at the same time.

On the horizontal groove base of the lid and the radially inner flank 10, a seal made of an elastic and compressible rubber material is molded in a piece. The sealing area 12 assigned to the inner groove flank 10 is arranged obliquely to the vertical, here at an angle of approximately 20 °, the angle also being able to assume values between 5 and 45 °, without being limited to this. When the cover is snapped on, the inclined section 12 of the seal 11 lies against the inward slope 13 which adjoins the top edge 4 of the bucket (see also FIG. 2, 3), the inclination of which corresponds to the contact surface of the section 12 corresponds to the seal without being limited to this. Due to this special design of the seal, the bucket is securely sealed even when the edge of the bucket is subjected to strong forces and can also be placed more easily. The cover section, which surrounds section 12 of the seal radially on the inside, is also designed to be chamfered.

The peripheral edge 5 of the bucket is set at the height of the upper edge 4, so that the edge 5 delimited from the edge Cavity 14 extends up to close to the top edge, ie up to about a wall thickness. The area of the upper edge 4 of the bucket is thus also designed as a U-shaped circumferential profile. As a result, the lid can be clamped optimally and forces that occur laterally can be absorbed.

On the inside of the seal 11, the cover has a circumferential sealing web 20, which only bears sealingly against the inner wall of the bucket over part of the height, in this example in the region of the lower end of the web, which is approximately at the height of the reinforcing edge 16 or the locking edge is arranged. The rib 20, which projects essentially vertically downwards, is arranged at the level of an inwardly projecting shoulder 21 of the inner wall of the bucket and is spaced slightly vertically from it. When there is little vertical pressure on the cover, the rib 20 rests on the shoulder 21. The shoulder 21 is delimited on the inside by a circumferential edge 22, instead of which individual projections can also be provided, the edge 22 protruding beyond the lower edge of the rib 20 and preventing an inward movement of the rib 20. The rib 20 can also be press-fit between the edge 22 and the wall region of the bucket adjoining on the outside. The rib 20 is slightly inclined outwards so that the sealing area of the rib 20, i.e. the lower end of the same (see FIG. 2) would come to lie radially outside the inner wall of the container when the cover is removed. The thickness of the lower edge corresponds approximately to the thickness of the ribs, preferably more than 1/4 of the same, whereby it tapers slightly conically here. As a result, with the cover attached, contact with the inner wall of the container is always achieved under radial prestress.

On the rib 20 above the sealing area and below the sealing area in the area of the upper edge of the container there is formed a radially inner edge 23 which slopes slightly or essentially horizontally (see also FIG. 4), from which the bevels 24 point inwards in segments or in places with widened margins in essential vertical wall areas 25 are formed, which merge into the horizontal lid area 26 at the same height. As part of the projections in the circumferential direction of the cover, the wall regions 25 are alternately formed with the bevels 24 on the peripheral edge 23. In this way, vertically extending side walls 29a of the protrusions formed on the rib 20 are avoided. Furthermore, material stresses which have an effect on the two sealing regions are minimized by the vertical spacing of the edge 20 or in the absence of a rim on the top of the projections. The area 26 is arranged below the latching edge 6, and its outer diameter, as shown, is dimensioned such that a stacking of buckets is possible. This results in projections with a triangular cross section, which are formed on a trapezoidal groove which is open at the bottom.

The essentially vertical leg of the U-shaped upper edge 4 merges outwardly into a bevel 15, as a result of which a stepped shoulder is formed. Below this paragraph, the locking edge 6 is formed, with a radially circumferential reinforcing edge 16 being formed between the locking edge and the heel, here at the height of the heel, which in this example terminates outwardly at the height of the locking edge 6 and has a width that corresponds to it vertical extent. The lower edge of the reinforcing edge 16 is designed in accordance with that of the locking edge 6, so that the locking edge 7 of the cover can also engage in the groove arranged between the edges 6 and 16, for which purpose the upper edge of the locking edge 6 also slopes outwards. The cover edge thus rests in the fully latched state on the outer edge of the locking edge 6 and / or the reinforcing edge 16, as a result of which, together with the sealing web 20, the upper container area is subjected to force on both sides. Particularly due to the vertical symmetrical application of force, the seal is very good. The U-shaped design of the upper container area, which can be laterally compressed under a clamping force, also contributes to this. Between bevel 15 and the one arranged above it Neten sliding bevel 17 of the cover can be provided with a small gap.

The circumferential edge 5 has a circumferential step shoulder 18 below the latching edge 7, which projects from the latching edge 7 to beyond the outer edge of the cover 2, the latching edge 7 being able to sit on the step shoulder 18 under pretension or also a gap between the latching edge and the step heel can be provided. The step shoulder 18 has an original closure 19, after the removal of which the latching edge 7 can be gripped manually from below and the cover can be removed. It should be pointed out here that preferably the cover area between the groove receiving the seal and the latching edge does not have any material monitoring worth mentioning, so that between the latching connection and the seal 11 or the area of the lid arranged inside the bucket 1 there is a high degree of stability and thus also given high tightness

The outer wall 3 of the bucket has a conicity or inclination to the outside of less than 3 °, preferably 2 °, to enable an improved power transmission with simultaneous stackability of buckets without a lid, whereby smaller inclinations are also possible. Furthermore, in order to be able to better absorb the forces in the case of stacked buckets with lids in the edge region, the distance between the side of the wall 25 of the projections facing the bucket center and the opposite outer wall of the bucket 26 is dimensioned with little play, e.g. B. with a distance of less than 2 mm, preferably 1 mm.

As can be seen from the enlarged representations according to FIGS. 2 and 3, the upper edge 4 of the bucket edge is provided with two circumferential ribs 36 which engage with the teeth on the underside of the seal 11 and / or next to the ribs 33 in the one formed between them Groove in or outside of it lie snugly from the edge of the container 4. This incongruent formation of the two structures makes one achieved high tightness of the bucket.

As can also be seen from the figure, vertical and perpendicular stiffening steps 38 are provided in the cavity 14 and have recesses 33 which are open at the bottom, the apex of the recess being offset from the outer wall of the bucket.

As can be seen from FIG. 4, the circumferential edge 23 of the lid arranged on the inside of the bucket wall 3 is provided with segments 28, 29 of different radial widths, which results in an effective stiffening profile in order to absorb forces on the sealing area of the rib 20 or the seal 11. According to the example, the circumferential extent of the regions 28, 29 is a multiple of their width. The bevels 24 and vertical wall regions 25 end at the same distance from the main axis of the bucket, the regions 30 which laterally delimit the bevel 24 extend obliquely to the circumference of the lid. The regions 25, 29 and 29a thus delimit the protrusions 25a.

A closable pouring spout is arranged in the central region 26 of the lid, which is arranged approximately at a quarter of the diameter of the bucket.

As can be seen from the stacking scheme according to FIG. 5, the lower edge of the locking edge 7 of the cover rests on the sliding slope 17 and the lower edge 35 of the sealing web 20 on the horizontal leg 31 of the groove 34 receiving the seal 11. As an alternative or in addition, the lower edge 32 of the box-shaped projection 25a can also rest on the upper edge of the projection of the cover arranged underneath. As can be seen from FIGS. 2 and 6, the lower edge of the sealing web represents the sealing area of maximum sealing effect with respect to the inner wall of the container. The area of the sealing web on which the peripheral edge 23 (the same was true for other molded areas such as, for example, protrusions formed directly on the sealing web) can have no or only a subordinate sealing effect, but possibly also a significant or high sealing effect.

6 shows a further exemplary embodiment, in which projections 29 with essentially vertical stiffening ribs 46 are provided on the inside of the cover, which are connected to the essentially vertical and essentially horizontal areas of the projecting segments 29 and in front of the circumferential sealing edge 20 ends. The distance to the sealing edge 20 can also be only relatively small, e.g. in the area of the wall thickness of the rib 46 or below. The stiffening ribs can also be extended up to the sealing edge 20, but they preferably do not abut the sealing edge in a linear manner in order to avoid sealing errors due to shrinkage, in particular not at the level of the sealing contact area of the sealing rib on the inner wall of the container, or with a vertical one Area whose vertical extension of the stiffening rib is at the level of the inner edge of the projection. The stiffening ribs 45 designed in this way can also be correspondingly provided on an inner circumferential edge of the cover, which is not divided into protruding and recessed areas. The ribs 46 end with the lower edge of the ceiling area, they can also support the ceiling area 26 if necessary.

Furthermore, sealing ribs 41 consisting of the container material are formed on the upper container edge, the container 34 receiving groove 40 being flat. Of course, sealing ribs can also be provided only on the contact area of the cover or on the underside of the cover and the upper edge of the container, where the ribs can be placed laterally on one another. The sealing ribs 41 consist of the container material and are integrally formed. The upper edge 40 of the container is here surrounded by a circumferential and downwardly projecting web 43 which is arranged radially on the outside and which closely abuts the radially outwardly projecting ribs 9 of the container. The bottom of the groove The horizontal cover area 44 extends radially outwards over the web 43, so that the sliding slope 17 is set steeper than according to the preceding exemplary embodiments. Stiffening ribs 45 can be provided between the web 43 and the sliding slope 17.

The areas 13a, 13b of the lid and the container, which adjoin the sealing area of the upper edge of the container radially on the inside, fall obliquely towards the inside of the container, here with great steepness of more than 60 °, the lid and container having little play, but can also lie against one another.

Otherwise, the container with a lid according to this exemplary embodiment has the features of the first exemplary embodiment, to which reference is hereby made.

As can be seen from the stacking scheme according to FIG. 7, the stiffening ribs 46 can serve at the same time for support on the cover lying underneath and in this case lie in a line or point-like manner on the top of the internal projections 29 or peripheral edges. In addition, the cover is supported on the cover located underneath, with the web 47 protruding below the locking edge and projecting from the circumferential bead 48 surrounding the sliding bevel 17. The sealing rib 20 is spaced from the adjacent cover, it can also be supported on this, if necessary.

It goes without saying that the stacking scheme shown can also be implemented for other designs of the container or lid, in particular other designs of the sealing area on the upper edge of the container.

FIG. 8 shows a further embodiment, in which the at least one projection 50 is formed on the upper side of an area 51 which extends radially inward from the sealing web and slopes downwards towards the interior of the container. The area 51 here represents a circumferential edge. The projection 50 is of web-like design here, with a large number are formed by webs on the peripheral area. The inclined sloping towards the holding potting portion 51 can be connected AUC ¹ 'directly to the sealing strip 20. D e mnenliegene radial edge of the projection can be inclined.

FIG. 9 shows a modification of a cover according to FIGS. 6 and 7, in which the stiffening ribs 46a extend as far as the sealing web 20 and have an area integrally formed thereon, the height of which is small compared to the height of the sealing web itself.

LIST OF REFERENCE NUMBERS

bucket

cover

outer wall

top edge

Edge, 7 snap edge

outer flank

Rib 0 flank 1 seal 1a sealing rib 2 vertical section 3 bevel 4 cavity 5 bevel 6 stiffening edge 7 slip bevel 8 step heel 9 original closure 0 sealing web 1 paragraph 2 edge 3, 24 bevel 5 wall 5a projection Area

Outer wall, 29 segments a side wall

Horizontal leg area

lower edge

recess

groove

Lower edge, 37, 38 rib

Behalteroberkante

sealing rib

web

Lid area, 46 stiffening rib a stiffening rib

web

bead

Lid area

Sloping area

Claims

1.Plastic container with a snap-on lid and with a catch arranged on the upper edge region of the container for latching fastening of the lid, the lid having a downwardly projecting circumferential sealing web, with the lid being radially inner to the sealing web at least em A projection is provided which extends essentially m radially and essentially in the vertical direction, characterized in that the vertical extent of the region (29, 46) of the projection (25a) adjacent to the sealing web (20) is small compared to the entire vertical Extension of the projection and / or against the vertical extension of a wall region (25) which adjoins the projection radially on the inside and extends essentially perpendicular to it.

2. A container according to claim 1, characterized in that the projection (29) has spaced apart side walls (29a) and / or ribs (45), the vertical extent of which is adjacent to the sealing web (20) and is small in relation to the entire one vertical extension and / or against the vertical extension of a radially inner border of the projection and extending essentially perpendicular to this wall region (25).

3. Container according to one of claims 1 or 2, so that the projection (25 a, 46) is arranged at a radial distance from the sealing web (20) arranged on the container side.

4. Container according to one of claims 1-3, so that the inward projection (25a, 46) is arranged on an edge (23) formed on the inner side of the sealing web (20) and encircling it

5. A container according to claim 4, characterized in that the peripheral edge (23) extends m radial direction over a wall thickness or more from the inside of the sealing web (20) away and the at least one projection (25a, 46) radially inward to the peripheral Edge (23) is arranged.

6. Container according to one of claims 1-5, so that the region (23, 46a) formed on the sealing web (20) is spaced apart from the region (35) of the sealing web (20) which produces the highest sealing effect.

7. Container according to one of claims 1-6, so that the sealing area (35) of the sealing web (20) lies in the area of the vertical height of the projections (25a).

8. Container according to one of claims 1-7, characterized in that the at least one projection (25a, 46) is formed on the lid at the height of the top of a radially inwardly extending from the sealing web and sloping towards the interior of the container (24).

9. Container according to one of claims 1 - 8, so that the cover (2) has a circumferential sealing area in the region of the upper container edge (4) in addition to the sealing web (20).

10. A container according to any one of claims 1-9, characterized in that an additional sealing area (13) is provided and that areas of the lid (23, 29, 46) of which are formed on the sealing web and extend radially inwards additional sealing area (13) are formed vertically spaced on the sealing web (20).

11. Container according to one of claims 1-10, d a d u r c h g e k e n n z e i c h n e t that is formed in the inner wall of the container below the sealing web (20) em paragraph (21) on which the sealing web (20) can be supported with its lower free end.

12. Container according to one of claims 1 - 11, d a d u r c h g e k e n n e e c h e n that that on the inner wall of the container radially inward to the circumferential sealing web (20) em up to beyond the lower edge of the web (20) upwardly projecting area (22) are provided.

13. Container according to one of claims 1-12, so that the inner cover surface (26) is arranged approximately at the height or below the lower edge of the sealing web on the container side.

14. Container according to one of claims 1-13, so that at least one radially projecting reinforcing rib (16) is formed on the edge of the container in the region of the upper edge of the container (4).

15. Container according to one of claims 1-14, characterized in that the sealing area of the container-side sealing web (20) is arranged approximately at the level of the outer latching edge (6) or an outer stiffening rib (16) of the container (1).

16. Container according to one of claims 1-15, characterized in that an additional sealing area between the upper edge of the container and the lid (2) with a circumferential seal (11) made of a material of higher elasticity than that of the container (1) and / or lid (2) is provided.

17. A container according to any one of claims 1-16, so that on the upper edge of the container (4) there is a radially inner region (13) which slopes obliquely to the inner wall of the container and extends at an acute angle to the main axis of the container.

18. Container according to one of claims 1-17, d a d u r c h g e k e n e z e i c h n e t that at the outer edge of the container upper edge (4) adjacent a radially outwardly projecting a contact surface (9) for laterally engaging the lid is formed.

19. Container according to one of claims 1 - 18, so that the peripheral region (5) drawn downwards on the outside in the upper region of the container (1) is provided in the region of the upper edge (4) of the container.