[0001] The container screw closure cap according to the invention comprises a fixing system
and a sealing system. The fixing system may or may not be carried out as a tamper
evidence band (see for example document DE-A-4 104 103). The crescent shaped cams
and the stretch windows of the fixing system to be described are forming the novel
element of the invention.
[0002] The sealing system which is also described in the context of the invention is versatile
in being adaptable to returnable bottles and to non-returnable bottles, in being practicable
in a one-component screw closure cap or in a two-component screw-closure cap and in
being useable in conjunction with a tamper evidence band or in conjunction with a
similar fixing system not having a guarantee function.
[0003] This sealing system of the screw closure cap is used for non-returnable containers
as well as for returnable containers. The outer diameter of the bottle neck having
the screw at the container opening is in any case standardized, so that the outer
parts of the multiple sealing system have the standardized dimensions irrespectible
of a non-returnable or returnable bottle to be closed. It is only the wall thickness
and the inner diameter of the bottle neck that may vary. This difference is taken
into consideration by shifting a tongue-like inner seal, i.e. by forming an inner
seal more centrally or more towards the cap body. In other words, the position of
the inner seal is dimensioned in such a way that its spacing from the outer skirt
increases as the inner diameter of the bottle neck decreases.
[0004] The sealing system may be manufactured in one component (e.g. PET like the totality
of the screw closure cap) or by a component design (e.g. a liner made from EVA and
a cap body made e.g. from PET).
[0005] The sealing system has to cooperate with the fixing system. If the fixing system
of the screw closure cap fulfils a guarantee function of a tamper evidence band, the
guarantee band of a returnable-container-closure is more complex than the guarantee
band of a one-way-container-closure. Basically, the tamper evidence band of a closure
for returnable bottles may only tear off over a part of the circular skirt and shall
remain connected to the cap body over the residual part of the circular skirt. For
this purpose, the sealing system and the fixing system of the returnable-container-closure
are tuned. The point is to close a full bottle by a screw closure cap in such a way
that neither the sealing system nor the fixing system is damaged.
[0006] The screw of the cap (which is adapted to the standardized container) is - by virtue
of the invention - relatively long, i.e. reaches far down. Thus, when the bottle is
closed, the screw gets into contact before the inner seal touches the bottle opening
and before the tamper evidence band touches the pilferproof ring of the bottle. It
is only when the screw has been fixed by about half a turn that an axis of the closure
cap is aligned with an axis of the bottle neck and the first snap-on of the tamper
evidence band over the pilferproof ring is performed. In this way, the sensible parts
of the tamper evidence band are protected from an undue and uneven overstretch.
[0007] If the fixing system is used as a tamper evidence band, it is fixed to the cap body
by weak bridges on part of the circular skirt. The band grips over the pilferproof
ring or overhang of the bottle opening (the cross section of the band being not even
along the circular skirt). The tamper evidence band is so as to allow the consumer
to distinctly recognize that a first opening has been performed. On the other hand,
no part of the tamper evidence band may remain on the bottle opening for the purpose
of bottles being returnable.
[0008] In order to function as a fixing system, the band has several crescent shaped cams
gripping under the pilferproof ring of the container. Preferably three such crescent
shaped cams are arranged in the vicinity of a crack point of the band. The crescent
shaped cams have a sharp upper edge and extend downwardly so as to be able to slip
over the pilferproof ring of the bottle opening.
[0009] Stretch windows, preferably two stretch windows, are arranged between the crescent-shaped
cams, wherein the stretch windows extend as small strips downwardly and are ending
in re-enforcements at the lower edge of the band. The stretch windows minimize the
material of the parts to be teared off by about half of the wall thickness of the
band. The longish windows extend at the outer skirt side as well as on the opposite
side at the inner skirt side downwards. At the inner side, the stretch windows pass
into the re-enforcements at the lower edge of the band. In this way, the band does
not tear at the lower end (with the exception of the crack point), but is stretchable
in the upper range of the cams. It is by this design that the caps may be screwed
over the pilferproof ring of the filled bottle without damaging the fixing system.
However, the cams will hook like a fishing rod at the first opening so that the crack
point tears off.
[0010] Furthermore, the invention relates to a container screw-closure cap which is made
of plastic and is provided, on the inner side of its cap base, with an annular sealing
lip which, when the screw-closure cap is screwed onto the container mouth, seals against
an inner side of the container mouth.
[0011] In the case of known screw-closure caps of this type, which are used, for example,
for bottles, the annular sealing lip engages in a sealing manner with the inner edge
of the container mouth. It has been found in practice that the sealing action of the
annular sealing lip is not sufficient in many cases, in particular on account of a
deformation of the cap base under the internal pressure of the container. Moreover,
even in the case of new containers which are filled for the first time, but in particular
in the case of refilled containers, the container mouths may exhibit irregularities
or damage which counteract(s) satisfactory sealing of the container.
[0012] The object of the invention is thus to provide a screw-closure cap which has an annular
seal on the cap base which seals against an inner side of a container mouth and in
the case of which the problems outlined are avoided and by means of which satisfactory
sealing is ensured even in the case of the container being reclosed and in the case
of irregularly formed mouths.
[0013] The screw-closure cap according to the invention is distinguished in that the annular
sealing lip, which has a predetermined bending strength, at a radial spacing in the
outward direction, is assigned a double annular rib which extends away from the inner
side of the cap base with a downwardly double tapering cross section and with a smaller
height than the sealing lip and engages with the end side of the container mouth when
the screw-closure cap is screwed on, and in that extending away from the transition
region of the cap base into the lateral cap surface is another annular rib, with tapering
cross section, which acts in a sealing manner on the outer side of the container mouth.
The double annular rib, on its end side, has two spaced-apart annular protrusions.
[0014] By virtue of this end side and outer side sealing region extending over a right angle,
the cap base is bowed (doming effect) in the event of a build-up in pressure of the
medium in the container, the lever action resulting in an additional pressure being
exerted on the outer and radial sealing region of the container mouth and in an increase
in the contact pressure per unit surface area. It is precisely on account of the wide
range of different types of damage in this region of the container mouth that this
seal design performs an additional important function specifically for use in the
drinks industry.
[0015] According to a preferred embodiment of the invention, the annular rib, which acts
on the outer side of the container mouth, is preferably of essentially V-shaped design
in cross section.
[0016] The invention further relates to a closure cap for a container, with a closure cap
base and at least two radially spaced sealing projections running around the cap and
extending away from the closure cap base, which, when the closure cap rests on the
container mouth, are each in touching contact with the container mouth and thus seal
the container interior in relation to the container exterior.
[0017] Closure caps of the type referred to here are known. They serve to close containers
in which filling material is stored. The filling material may be a preferably granular
solid, but may also be a liquid. In the storage of liquids, the problem frequently
arises that these liquids increase their volume, for example under the action of heat
or as a result of chemical reactions. This has a number of disadvantageous effects.
It may lead to what is known as the doming effect, for example, as a result of which
the closure cap base curves outwardly in a domed shape owing to the application of
pressure from the container interior. This can lead to damage to the container or
the closure cap and, in extreme cases, even to the container bursting or the closure
cap being blown off Both of these endanger a user of the container.
[0018] It is therefore an object of the invention to provide a closure cap of the type referred
to here, which makes possible safe storage of the filling material in the container,
pressure release in the event of increased inner pressure and resealing when the pressure
in the container decreases again, so that safe handleability is guaranteed for the
user.
[0019] The object is achieved by a closure cap of the type referred to here, in which sealing
projections are provided, which are designed and interact in such a way that, in the
event of increased inner pressure, as burst protection for the container, an ending
of the touching contact between a radially inner sealing projection and the container
mouth brings about an ending of the touching contact between a radially outer sealing
projection and the container mouth and that, after pressure equalization by venting
has taken place, both sealing projections retum to their previous touching-contact
position and consequently lie sealingly in their respective area of the container
mouth again.
[0020] The curving of the closure cap base, which arises when pressure is applied from the
container interior, leads first to a physical displacement of radially inner sealing
projection. This displacement ends the touching contact between the radially inner
sealing projection and the container mouth, so that this sealing projection no longer
seals the container interior in relation to the container exterior. According to the
lever law, the radially staggered arrangement of the two sealing projections on the
closure cap base causes the touching contact between the radially outer sealing projection
and the container mouth as well to be ended, and therefore this sealing projection
also no longer seals the container interior in relation to the container exterior.
A direct connecting path is brought about between the container interior and the container
exterior. The overpressure acting in the interior of the container is reduced (the
container is vented, blowing-up effect). The risk of damage to the container or the
closure cap, and in particular the bursting of the container or the blowing-off of
the closure cap and the attendant danger to the container user, are thus effectively
avoided.
[0021] With regard to the ending of the touching contact between the radially inner sealing
projection and the container mouth, it has been found to be especially advantageous
if the radially inner sealing projection and the container mouth are in touching contact
along an area directly adjacent to the end side of the container mouth, since in this
case the ending of the touching contact between the radially inner sealing projection
and the container mouth requires a paniculady small physical displacement, and therefore
a very small application of pressure. The closure cap in this illustrative embodiment
is therefore extremely sensitive in the event of pressure variations.
[0022] The sealing projections can be designed physically differently. In practice, radially
inner sealing projections designed as annular sealing lips which run around the cap,
project into the container interior and have on their outer side a bulge facing the
inner side of the container mouth have proved successful. In this illustrative embodiment
of the closure cap, the touching contact is brought about between the bulge and the
container mouth when the closure cap rests on the container mouth.
[0023] A further illustrative embodiment of the closure cap comprises a radially outer sealing
projection which is designed as an annular rib having a W-shaped cross section, the
points of which face the end side of the container mouth. In this illustrative embodiment,
the two points of the radially outer sealing projection and the end side of the container
mouth are in touching contact when the closure cap rests on the container mouth
[0024] Simpler to manufacture in comparison with the abovementioned illustrative embodiment
is a closure cap with a radially outer sealing projection which is designed as an
annular rib having a V-shaped cross section, the point of which faces the end side
of the container mouth. In this illustrative embodiment, the point of the radially
outer sealing projection and the end side of the container mouth are in touching contact
when the closure cap rests on the container mouth
[0025] In a further illustrative embodiment of the closure cap, a further sealing projection
designed as an annular rib, which has on its inner side a bulge facing the outer side
of the container mouth, extends away from the edge of the closure cap base. In this
illustrative embodiment, three sealing projections are therefore present, each of
which individually seals the container interior in relation to the container exterior.
[0026] If, after venting of the container, the closure cap is to resume its original physical
shape, an illustrative embodiment of the closure cap in which the cap consists of
elastic material is proposed. In this illustrative embodiment, the touching contact
between the sealing projections and the container mouth is in each case re-established
after venting and the container interior is therefore sealed in relation to the container
exterior again.
[0027] Plastic has been found to be an elastic material which is very simple to handle in
practice, for which reason plastic closure caps constitute a preferred illustrative
embodiment of the closure cap.
[0028] The closure cap can enter into engagement with the container mouth in various ways.
In this connection, an illustrative embodiment of the closure cap in which the cap
is designed as a screw-closure cap has been found to be advantageous. In this illustrative
embodiment, the outer side of the container mouth is provided with an external thread,
and the inner side of the closure cap wall is provided with an internal thread, which
threads enter into engagement with one another when the bottle is closed.
[0029] The invention is explained in more detail hereinbelow by way of exemplary embodiments
and with reference to the accompaning drawings in which:
- Fig. 1
- shows an axial section through a screw-closure cap, with a tamper evidence band for
returnable bottles, having four sealing elements according to the invention;
- Fig. 2
- shows a bottom view onto the tamper evidence band of the sealing cap according to
Fig. 1;
- Fig. 3
- shows an axial section through the tamper evidence band of Fig. 2;
- Fig. 4
- shows an axial section through a screw-closure cap, with a tamper evidence band for
disposable bottles, having four sealing elements according to the invention;
- Fig. 5
- shows a bottom view onto the tamper evidence band of the cap according to Fig. 4;
- Fig. 6
- shows an axial section through the tamper evidence band of Fig. 5; and
- Fig. 7
- shows an enlarged axial section through part of the caps, namely through the sealing
elements according to the invention.
- Fig. 8
- shows an axial section through part of a container mouth and a closure cap before
venting, and
- Fig. 9
- shows an axial section through the part of the container mouth and the closure cap
during venting.
[0030] Referring to Figs. 1, 4 and 7 together, there is shown a screw-closure cap 1 (illustrated
only in part in Fig. 7), which is produced from plastic, e.g. by injection moulding
or compression moulding. The cap 1a is intended for mounting on a container mouth
2, and has a lateral surface 3a and a base 4. The lateral cap surface 3a bears, on
its inner side, a thread 6 via which the screw-closure cap 1a can be screwed onto
a mating thread 5a on the outer side of the container mouth 2.
[0031] The base 4 of the screw-closure cap 1a bears on its inner side, in the region of
the inner edge 2" of the container mouth 2, an annular sealing lip 7a, which projects
integrally downwards from the base 4 and in axial section, in the non-deformed state,
has a substantially vertical inner side 7', a radially outwardly curving top outer-wall
section and a conically downwardly and inwardly running bottom outer-wall section.
[0032] In the embodiments shown in Fig. 1, 4 and 7, the annular sealing lip 7a, by way of
its outher-wall sections (obliquely inwardly running conical outer-wall section and
curved outer-wall section), comes into contact with the inner edge 2", before the
thread engagement, when the screw-closure cap 1a is screwed on and, when it penetrates
into the cylindrical inner side 2" of the container mouth 2, is deformed by compression
such that a relatively wide annular zone is produced as a sealing surface in relation
to the inner side 2" of the container mouth 2. In the case of the material of the
screw-closure cap having a predetermined level of rigidity, the contact and/or sealing
pressure per unit surface area is reduced as a result.
[0033] At a radial spacing from the annular sealing lip 7a, a double annular rib 8 extends
away from the base 4 of the screw-closure cap 1a, said double annular rib 8 being
of a considerably smaller height than the annular sealing lip 7a and acting on the
end side of the container mouth 2 via two annular protrusions 8', 8". At right angles
to the annular rib 8, in addition, a further annular rib 9a is provided from the transition
region of the cap base 4 into the lateral cap surface 3a, said further annular rib
9a acting on the outer side of the container mouth 2 and being designed to taper in
an essentially V-shaped manner in cross section.
[0034] By virtue of this right-angled sealing zone 8, 9a, the cap base 4 is bowed (doming
effect) in the event of a build-up in pressure of the medium within the closed container.
Consequently, an additional pressure is exerted on the radially outer sealing region
8"of the container mouth 2 and the sealing rib 9a as a result of lever action, which
means that there is an increase in the contact pressure per unit surface area in this
region. It is on account of the wide range of different types of damage in this region
of the container mouth 2 that the screw cap 1a according to the invention performs
an additional important function, specifically for use in the drinks industry. The
screw cap 1a according to the invention is preferably produced from plastic by injection
moulding or by compression moulding.
[0035] To summarize the essential features, the container screw-closure cap 1a is made of
plastic, preferably polyethylene, and has four sealing elements.
[0036] The main sealing element is the tongue-like sealing lip 7a which engages a sealing
contact border in the inner side of the container 2. A second extension 9a seals the
container on the outer side. A fixed stop 8 with annular protrusions 8' and 8" is
located on the top border of the container 2. Said annular protrusions are of different
heights. The inner annular protrusion 8' is higher than the outer protrusion 8".
[0037] By virtue of an increase in pressure in the container, the cap base 4 bows in a dome-like
manner. The inner seal 7a moves away from the container wall 2". At the same time,
the annular protrusion 8' lifts up slightly, but the outer side of the cap 1a presses
more in the direction of the center of the container 2 and the extension 9a and the
annular protrusion 8" is thus pressed to a more pronounced extent against the container
mouth 2 and, in the process, seals the closure 1a again on the top out side of the
container 2 and via the extension 9a.
[0038] A tamper evidence band (Fig. 2, 3 or Fig. 5, 6, respectively) is fixed to the base
body 1a by means of weak bridges 13a. A wraparound projection element 14 snaps on
an overhang at the lower end of the bottle outlet 2. The shaping of the wraparound
projection element 14 guarantees the function of the tamper evidence band. After the
bottle 2 has been opened the band remains on the container 2 (Fig. 4 to 6) or the
band remains on the cap body 1a (Fig. 1 to 3).
[0039] The described sealing system 7a, 8, 9a of the closure cap 1a is applicable for disposable
containers as well as for returnable containers. The outer diameter of the bottle
neck 2 having the screw thread 5a at the container mouth 2 is standardized, so that
the outer sealing 9a and the double annular rib 8 of the closure cap 1a may have the
same dimensions, regardless whether a non-returnable bottle or a returnable bottle
is to be closed. It is only the wall thickness and, thus, the clear opening 2" of
the bottle neck 2 that may differ. This difference is taken into account by forming
the inner seal 7a further inwards or further outwards with respect to the cap base
4. In other words, the position of the inner seal 7a is designed such that its spacing
from the outer seal 9a increases as the clear opening 2" of the bottle neck 2 decreases.
[0040] However, the tamper evidence band (Fig. 2, 3) of a closure cap for returnable bottles
(Fig. 1) has a more complex design than the tamper evidence band (Fig. 5, 6) of a
closure cap belonging to a non-returnable bottle (Fig. 4). The tamper evidence band,
in the case of returnable containers, is to break off at only part of the circle (crack
point 12 in Fig. 2) and shall remain connected to the cap 1a at the residual part
of the circle. In accordance with such purpose, the sealing system 7a, 8, 9a and the
tamper evidence band of such a closure cap are tuned as described below. The point
is to close a filled bottle by the closure cap 1a in such a way that neither the sealing
system 7a, 8, 9a nor the tamper evidence band (Fig. 1 to 3) are damaged.
[0041] The counter screw 6 of the closure cap 1a which is adapted to the standardized container
2 is drawn downwards to a relatively large extent (Fig. 1). When the cap 1a is going
to close the filled bottle 2, an intervention of the screw 6 occurs before the inner
seal 7a touches the bottle neck 2 and before the tamper evidence band 10-14 touches
the pilfer proof ring of the bottle 2. Only after the screw 6 has performed approximately
a half turn so that the axis of the closure cap 1a is aligned with the axis of the
bottle neck 2, the first snap-on of the tamper evidence band 10-14 occurs at the pilfer
proof ring. In this manner, the crack point 12 of the tamper evidence band 10-14 is
guarded against premature extension.
[0042] The tamper evidence band is, on a part of the circuit, fixed to the cap body 1a by
weak bridges 13a. The band grips below the pilfer proof ring of the bottle neck 2,
although the protrusion 14 of the tamper evidence band (Fig. 1-3) does not have the
same form all along the circle. The tamper evidence band is designed such that the
consumer may immediately recognize the occurrence of a first opening. On the other
hand, no part of the tamper evidence band remains at the bottle neck because the bottle
shall be cleanly re-usable.
[0043] In order to guarantee such functions, the tamper evidence band has several crescent-shaped
cams 11a gripping under the pilfer proof ring of the bottle. Preferably three such
cams 11a are arranged in the vicinity of the crack point 12 of the tamper evidence
band. The cams 11a are provided with a sharp-edged upper surface and have a tapering
extension downwards to be able to slide over the pilfer proof ring of the bottle neck
2.
[0044] Stretch windows 10 are arranged between the cams 11a. The stretch windows 10 extend
like narrow stripes in vertical direction and close in re-inforcements at the lower
edge of the band. The stretch windows 10 are designed to lessen the material of the
tear-off part of the tamper evidence band. The longish notches 10 extend downwards
at the outer circle (Fig. 2) and at the opposite location of the inner circle (Fig.
3). The stretch windows 10 at the inner side when approaching the lower edge of the
tamper evidence band, pass into the re-inforcements (Fig. 3). In this way, the tamper
evidence band does not tear off at its lower edge (apart from the crack point 12),
but may be stretched in the upper part where the cams 11 a are located. It is by this
design that the cap 1a may be screwed on without damaging the crack point 12, while
the cams 11a are interlocking at the first opening thus tearing off the crack point
12.
[0045] It goes without saying that the exemplary embodiment shown may be modified in various
ways within the context of the idea of the invention, in particular as far as the
configuration of the double rib 8 and the further rib 9a is concerned.
[0046] Figure 8 shows part of a container or bottle mouth 1 and a closure cap 3. The container
mouth 1 is part of a container (not illustrated in the drawing) which is filled with
a filling material (likewise not illustrated). The container mouth 1 is of rotationally
symmetrical design in relation to an axis of extent 5. The container mouth 1 has an
inner side 7 facing the axis of extent 5 and an outer side 9 facing away from it.
Between the inner side 7 and the outer side 9 of the container mouth 1, an end side
11 of the container mouth 1 facing in a direction running parallel to the axis of
extent 5 is located on the upper edge of the container mouth 1. The end side 11 merges
with the inner side 7 via a first rounded portion 13 and with the outer side 9 of
the container mouth 1 via a second rounded portion 15. The container mouth 1 is provided
with an external thread 17 on its outer side 9.
[0047] The closure cap 3 rests on the container mouth 1. The closure cap 3 has a closure
cap base 19 and
a closure cap wall 21. The closure cap base 19 extends essentially at right angles
to the axis of extent 5 of the container mouth 1, while the closure cap wall 21 extends
parallel to it. The closure cap wall 21 is provided on its inner side 23 with an internal
thread 25 which is in engagement with the external thread 17 of the container mouth
1.
[0048] The closure cap 3 has three sealing projections 27a, 27b, 27c. The sealing projections
27a, 27b, 27c extend away from the closure cap base 19 of the closure cap 3 and are
designed in one piece with it.
[0049] The radially innermost sealing projection 27a is designed as an annular sealing lip
31 which runs around the cap, projects into the container interior 29 and is provided
on its outer side 33 with a bulge 35 which faces and lies against the inner side 7
of the container mouth 1.
[0050] The radially outer sealing projection 27b is designed as an annular rib 37 having
a W-shaped cross section, the two points 39a, 39b of which rest on the end side 11
of the container mouth 1.
[0051] The sealing projection 27c lastly is designed as an annular rib 41 which is arranged
at the edge of the closure cap base 19 and is provided on its inner side 43 with a
bulge 45 with which it lies against the rounded area 15 and the outer side 9 of the
container mouth L
[0052] The illustrative embodiment of the closure cap 3 therefore has four places where
touching contact with the container mouth 1 exists, namely with regard to the sealing
projection 27a that place at which its bulge 35 lies against the inner side 7 of the
container mouth 1, with regard to the sealing projection 27b those places at which
the points 39a, 39b of the sealing projection 27b rest on the end side 11 of the container
mouth 1, and with regard to the sealing projection 27c that place at which its bulge
45 lies against the second rounded portion 15 and the outer side 9 of the container
mouth 1. It is clear that the container interior 29 is sealed in relation to the container
exterior 47 by the same touching-contact places.
[0053] Both the container mouth 1 and the closure cap 3 of the illustrative embodiment described
in Figure 8 consist of elastic plastic. It is to be expressly pointed out, however,
that other materials are also possible for this. The container mouth, and the entire
container as well, can thus also consist of glass, for example.
[0054] If the filling material present in the container expands, pressure is applied to
the closure cap base 19 in the direction of an arrow 49, as illustrated diagrammatically
in Figure 9. The closure cap base 19, which in the absence of pressure application
from the container interior 29, as illustrated in Figure 8, has an essentially plane
extent, is deformed in a domed or arched shape under the action of the overpressure
from the container interior, that is to say it bulges in the direction of the anow
49 in its central area 51.
[0055] Owing to this deformation of the closure cap base 19, the sealing projections 27a,
27b, 27c change their physical position, and in particular all three sealing projections
27a, 27b, 27c are displaced in the direction of the arrow 49. As can be seen in Figure
9, the touching contact between the sealing projections 27a, 27b, 27c and the container
mouth is ended as a result, so that the container interior 29 is no longer sealed
in relation to the container exterior 47.
[0056] The overpressure present in the container interior 29 can then, as indicated by arrows
53, escape from the container interior 29, and the closure cap 3 is therefore vented.
The abrupt cessation of the application of pressure to the closure cap base 19 accompanying
the venting of the container brings about, on account of the elasticity of the closure
cap 3, a deformation of the closure cap base 19 back into its original shape. As a
result of this, the sealing projections 27a, 27b, 27c also return to their original
physical position, that is to say they enter into touching contact with the container
mouth 1 again. The container interior 29 is then sealed in relation to the container
exterior 47 again. In the event of an overpressure developing in the container interior
29 again, the closure cap 3 can be vented again.
[0057] In practice, the overpressure in the container interior 29 is of the order of preferably
8 to 12 bar. After venting of the closure cap, the pressure in the container interior
29 is reduced to roughly 5 bar.
[0058] From all the above, it is clear that the closure cap 3 according to the invention
makes possible safe storage of filling materials in containers.
List of Reference Numbers
[0059]
- 1
- bottle mouth
- 1a
- screw-closure cap
- 2
- container mouth
- 2"
- cylindrical inner edge of container mouth 2
- 3
- closure cap
- 3a
- lateral cap surface
- 4
- cap base
- 5
- axis of extent
- 5a
- thread on the container mouth 2
- 6
- thread on the lateral cap surface 3a
- 7
- inner side of the bottle mouth 1
- 7a
- annular sealing lip
- 7'
- vertical inner side of annular sealing lip 7a
- 8
- double annular rib
- 8'
- inner annular protrusion
- 8"
- outer annular protrusion
- 9
- outer side of the bottle mouth 1
- 9a
- outer annular rib
- 10
- stretch windows
- 11
- end side of the bottle mouth 1
- 11a
- crescent-shaped cams
- 12
- crack point
- 13
- first rounded portion of the bottle mouth 1
- 13a
- weak bridges
- 14
- cross section for gripping under the pilferproof ring of the container
- 15
- second rounded portion of the bottle mouth 1
- 17
- external thread of the bottle mouth 1
- 19
- closure cap base of the closure cap 3
- 21
- closure cap wall of the closure cap 3
- 23
- inner side of the closure cap 3
- 25
- external thread
- 27a
- sealing projection
- 27b
- sealing projection
- 27c
- sealing projection
- 29
- container interior
- 31
- annular sealing lip
- 33
- outer side of the annular sealing lip 31
- 35
- bulge of the annular sealing lip 31
- 37
- annular rib
- 39a
- first point of the annular rib 37
- 39b
- second point of the annular rib 37
- 41
- further annular rib
- 43
- inner side of the annular rib 41
- 45
- bulge of the annular rib 41
- 47
- container exterior
- 49
- arrow
- 51
- central area of the closure cap base 19
- 53
- arrows
1. A container screw-closure cap made of PET plastic,
having a plural sealing system for sealing a mouth of a container and having a fixing
system for fixing said cap at an overhang of said container mouth, characterized in that
a plurality of crescent-shaped cams (11) and one or more intermediate stretch windows
(10)
are both comprised in said fixing system.
2. The container screw-closure cap according to claim 1, characterized in that said fixing system forms a circular tamper evidence band having weak bridges (13)
to the cap body.
3. The container screw-closure cap of claim 2, characterized in
having said crescent-shaped cams (11) protruding for snapping on said overhang of
said container mouth and
having said stretch windows (10) between said cams (11) on a part of said circular
tamper evidence band in the vicinity of a crack point,
such that the tamper evidence band remains at the cap body when the container is opened.
4. A container screw-closure cap made of plastic,
having a plural sealing system for sealing a mouth of a container and having a fixing
system for fixing said cap at an overhang of said container mouth, characterized in that
a plurality of crescent-shaped cams (11) and
one or more intermediate stretch windows (10) are both comprised in said fixing system,
having said cams (11) as protruding elements snapping on said overhang of the container
mouth,
such that the fixing system forming a tamper evidence band remains at the container
when the container is opened.
5. The container screw closure cap according to one of the claims 1 to 4, characterized in that said plural sealing system is provided on an inner side of a cap base, with an annular
sealing lip having a form such that, when the screw-closure cap is screwed onto said
container mouth, said lip seals against an inner side of the container mouth, the
cap further comprising a double annular rib which extends away from the inner side
of the cap base with a downwardly double tapering cross section, each with a height
smaller than that of the sealing lip, such that the double annular rib has two spaced-apart
annular protrusions for engaging with an end of the container mouth when the screw-closure
cap is screwed on, and a further annular rib extending away from a transition region
between the cap base and a cap side, said further annular rib having a tapering cross
section for acting in a sealing manner on an outer side of the container mouth.
6. The container screw-closure cap according to claim 5, characterized in that the annular rib which acts on the outer side of the container mouth is of essentially
V-shaped design in cross section.
7. The container screw-closure cap according to one of the claims 4 to 6 characterized in that said plastic is PET.
8. The container screw-closure cap according to claim 5, 6 or 7 characterized in that said sealing system is a plastic liner made from EVA and the remainder of the cap
is made from PET.
9. Closure cap for a container according to one of the previous claims, with a closure
cap base and at least two radially spaced sealing projections running around the cap
and extending away from the closure cap base, which, when the closure cap rests on
the container mouth, are each in touching contact with the container mouth and thus
seal the container interior in relation to the container exterior,
characterized in that the at least two sealing projections are designed and interact in such a way that,
in the event of a rise in pressure in the container interior, an ending of the touching
contact between the radially inner sealing projection (21a) and the container mouth
(1) brings about an ending of the touching contact between the radially outer sealing
projection 827b) and the container mouth (1) and that, after equalization of the overpressure,
both sealing projections (27a, 27b) lie sealingly in their respective area of the
container mouth again.
10. Closure cap according to claim 9, characterized in
that the radially inner sealing projection (27a) and the container mouth 81) are in touching
contact along an area directly adjacent to the end side (11) of the container mouth
(1).
11. Closure cap according to one of the preceding claims 9 or 10, characterized in that the radially inner sealing projection (27a) is designed as an annular sealing lip
(31) which runs around the cap, projects into the container interior (29) and has
on its outer side (33) a bulge (35) facing the inner side (7) of the container mouth
(1).
12. Closure cap according to one of the preceding claims 9 to 11, characterized in that the radially outer sealing projection (27b) is designed as an annular rib (37) having
a W-shaped cross section, the points (39a, 39b) of which face the end side (11) of
the container mouth (1).
13. Closure cap according to one of the preceding claims 9 to 12, characterized in that the radially outer sealing projection (27b) is designed as an annular rib having
a V-shaped cross section, the point of which faces the end side (11) of the container
mouth (1).
14. Closure cap according to one of the preceding claims 9 to 13, characterized in that a further sealing projection (27c) designed as an annular rib (41), and having on
its inner side (43) a bulge (45) facing the outer side (9) of the container mouth
(1), extends away from the edge of the closure cap base (19).
1. Behälterschraubverschlussdeckel aus PET-Kunststoff, mit einem Mehrfachabdichtungssystem
zum Abdichten einer Öffnung eines Behälters und mit einem Fixierungssystem zum Fixieren
des Deckels an einem Überhang der Behälteröffnung, dadurch gekennzeichnet, dass
sowohl mehrere halbmondförmige Nocken (11) als auch eines oder mehrere zwischengeordnete
Streckfenster (10) in dem Fixierungssystem enthalten sind.
2. Behälterschraubverschlussdeckel nach Anspruch 1, dadurch gekennzeichnet, dass das Fixierungssystem als ein kreisförmiges Verpackungssiegel ausgebildet ist, das
zum Verschlusskörper hin schwache Stege (13) aufweist.
3. Behälterschraubverschlussdeckel nach Anspruch 2, dadurch
gekennzeichnet, dass
die halbmondförmigen Nocken (11) zum Einschnappen am Überhang der Behälteröffnung
vorstehen und
die Streckfenster (10) zwischen den Nocken (11) an einem Teil des kreisförmigen Verpackungssiegels
in der Nachbarschaft einer Sollbruchstelle vorgesehen sind, so dass das Verpackungssiegel
am Deckelkörper verbleibt, wenn der Behälter geöffnet wird.
4. Behälterschraubverschlussdeckel aus Kunststoff,
mit einem Mehrfachabdichtungssystem zum Abdichten einer Öffnung eines Behälters und
mit einem Fixierungssystem zum Fixieren des Deckels an einem Überhang der Behälteröffnung,
dadurch gekennzeichnet, dass sowohl mehrere halbmondförmige Nocken (11) als auch eines oder mehrere zwischengeordnete
Streckfenster (10) in dem Fixierungssystem enthalten sind,
wobei die Nocken (11) als vorstehende Elemente vorgesehen sind, die über dem Überhang
der Behälteröffnung einschnappen,
so dass das ein Verpackungssiegel bildende Fixierungssystem am Behälter verbleibt,
wenn der Behälter geöffnet wird.
5. Behälterschraubverschlussdeckel nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, dass das Mehrfachabdichtungssystem auf einer Innenseite einer Deckelbasis vorgesehen ist,
wobei eine ringförmige Dichtungslippe eine solche Form hat, dass beim Aufschrauben
des Schraubverschlussdeckels auf die Behälteröffnung die Lippe gegen die Innenseite
der Behälteröffnung eine Abdichtung bildet, wobei der Deckel ferner einen doppelten
ringförmigen Steg umfasst, der sich mit einem sich nach unten doppelseitig verjüngenden
Querschnitt jeweils mit einer Höhe, die kleiner als diejenige der Dichtungslippe ist,
von der Innenseite der Deckelbasis weg erstreckt, so dass der doppelte ringförmige
Steg zwei beabstandete ringförmige Fortsätze bildet, um mit einem Ende der Behälteröffnung
in Eingriff zu kommen, wenn der Schraubverschlussdeckel aufgeschraubt wird, und einen
weiteren ringförmigen Steg, der sich von einem Übergangsbereich zwischen der Deckelbasis
und einer Deckelseite weg erstreckt, wobei der weitere ringförmige Steg einen sich
verjüngenden Querschnitt hat, um in abdichtender Weise mit einer Außenseite der Behälteröffnung
zusammenzuwirken.
6. Behälterschraubverschlussdeckel nach Anspruch 5, dadurch gekennzeichnet, dass der ringförmige Steg, der mit einer Außenseite der Behälteröffnung zusammenwirkt,
im Querschnitt im Wesentlichen V-förmig ausgebildet ist.
7. Behälterschraubverschlussdeckel nach einem der Ansprüche 4 bis 6,
dadurch gekennzeichnet, dass der Kunststoff PET ist.
8. Behälterschraubverschlussdeckel nach den Anspruch 5, 6 oder 7, dadurch gekennzeichnet, dass das Abdichtungssystem ein Kunststoffeinsatz ist, der aus EVA besteht, und der Rest
des Deckels aus PET hergestellt ist.
9. Verschlussdeckel für einen Behälter nach einem der vorhergehenden Ansprüche, mit einer
Verschlussdeckelbasis und mindestens zwei radial bestandeten Abdichtungsfortsätzen,
die um den Deckel herum verlaufen und sich von der Verschlussdeckelbasis weg erstrecken,
die, wenn der Verschlussdeckel an der Behälteröffnung anliegt, jeweils in Berührungskontakt
mit der Behälteröffnung sind und so das Innere des Behälters gegen das Äußere des
Behälters abdichten,
dadurch gekennzeichnet, dass die mindestens zwei Abdichtungsfortsätze so ausgebildet sind und so zusammenwirken,
dass im Fall eines Druckanstiegs im Inneren des Behälters eine Beendigung des Berührungskontakts
zwischen dem radial inneren Abdichtungsfortsatz (27a) und der Behälteröffnung (1)
auch eine Beendigung des Berührungskontakts zwischen dem radial äußeren Abdichtungsfortsatz
(27b) und der Behälteröffnung (1) bewirkt und dass nach einem Ausgleich des Überdrucks
beide Abdichtungsfortsätze (27a, 27b) wieder in ihrem entsprechenden Bereich der Behälteröffnung
zu liegen kommen.
10. Verschlussdeckel nach Anspruch 9, dadurch gekennzeichnet, dass der radial innere Abdichtungsfortsatz (27a) und die Behälteröffnung (1) entlang eines
der Stirnseite (11) der Behälteröffnung (1) direkt benachbarten Bereichs in Berührungskontakt
sind.
11. Verschlussdeckel nach einem der vorhergehenden Ansprüche 9 oder 10,
dadurch gekennzeichnet, dass der radial innere Abdichtungsfortsatz (27a) als eine ringförmige Abdichtungslippe
(31) ausgebildet ist, die um den Deckel herum verläuft und sich in das Innere (29)
des Behälters erstreckt und auf seiner Außenseite (33) einen Wulst (35) aufweist,
der zur Innenseite (7) der Behälteröffnung (1) zeigt.
12. Verschlussdeckel nach einem der vorhergehenden Ansprüche 9 bis 11,
dadurch gekennzeichnet, dass der radial äußere Abdichtungsfortsatz (27b) als ein ringförmiger Steg (37) mit einem
W-förmigen Querschnitt ausgebildet ist, wobei dessen Spitzen (39a, 39b) zur Stirnseite
(11) der Behälteröffnung (1) zeigen.
13. Verschlussdeckel nach einem der vorhergehenden Ansprüche 9 bis 12,
dadurch gekennzeichnet, dass der radial äußere Abdichtungsfortsatz (27b) als ein ringförmiger Steg mit einem V-förmigen
Querschnitt ausgebildet ist, dessen Spitze zur Stirnseite (11) der Behälteröffnung
(1) zeigt.
14. Verschlussdeckel nach einem der vorhergehenden Ansprüche 9 bis 13,
dadurch gekennzeichnet, dass sich ein weiterer Abdichtungsfortsatz (27c), der als ein ringförmiger Steg (41) ausgebildet
ist und auf seiner Innenseite (43) einen Wulst (45) aufweist, der zur Außenseite (9)
der Behälteröffnung (1) zeigt, vom Rand der Verschlussdeckelbasis (19) weg erstreckt.
1. Couvercle à fermeture à vissage pour récipient, réalisé en matière plastique PET,
comprenant un système à étanchéité multiple pour étanchéifier une ouverture d'un récipient
et comprenant un système de fixation pour fixer ledit couvercle sur une saillie de
ladite ouverture du récipient, caractérisé en ce qu'une pluralité de taquets en forme de croissant (11) et une ou plusieurs fenêtres d'étirement
intermédiaires (10) font partie dudit système de fixation.
2. Couvercle à fermeture à vissage pour récipient selon la revendication 1, caractérisé en ce que ledit système de fixation forme une bande à témoin d'inviolabilité circulaire ayant
des points faibles (13) sur le corps du couvercle.
3. Couvercle à fermeture à vissage pour récipient selon la revendication 2, caractérisé par le fait que lesdits taquets en forme de croissant (11) dépassent de ladite ouverture du récipient
pour un encliquetage sur ladite saillie de ladite ouverture du récipient et caractérisé par le fait que lesdites fenêtres d'étirement (10) se trouvent entre lesdits taquets (11) sur une
partie de ladite bande à témoin d'inviolabilité circulaire à proximité d'un point
de rupture, de façon à ce que la bande à témoin d'inviolabilité reste sur le corps
du couvercle lorsque le récipient est ouvert.
4. Couvercle à fermeture à vissage pour récipient, réalisé en matière plastique, comprenant
un système à étanchéité multiple pour étanchéifier une ouverture d'un récipient et
comprenant un système de fixation pour fixer ledit couvercle sur une saillie de ladite
ouverture du récipient, caractérisé en ce qu'une pluralité de taquets en forme de croissant (11) et une ou plusieurs fenêtres d'étirement
intermédiaires (10) font partie dudit système de fixation, lesdits taquets (11) étant
des éléments qui dépassent et qui s'encliquètent sur ladite saillie de l'ouverture
du récipient, de façon à ce que le système de fixation formant une bande à témoin
d'inviolabilité reste sur le récipient lorsqu'il est ouvert.
5. Couvercle à fermeture à vissage pour récipient selon l'une des revendications 1 à
4, caractérisé en ce que ledit système à étanchéité multiple est muni, à l'intérieur d'une base de couvercle,
d'une lèvre d'étanchéité annulaire ayant une forme telle que, lorsque le couvercle
à fermeture à vissage est vissé sur ladite ouverture du récipient, ladite lèvre étanchéifie
l'intérieur de l'ouverture du récipient, le couvercle comprenant en outre une double
nervure annulaire qui s'éloigne de l'intérieur de la base du couvercle avec une section
transversale double se rétrécissant vers le bas, avec une hauteur inférieure à celle
de la lèvre d'étanchéité, de façon à ce que la double nervure annulaire présente deux
saillies annulaires écartées qui lui permettent de s'emboîter avec une extrémité de
l'ouverture du récipient lorsque le couvercle à fermeture à vissage est vissé, et
une nervure annulaire supplémentaire qui s'étend à partir d'une zone de transition
entre la base du couvercle et un côté du couvercle, ladite nervure annulaire supplémentaire
présentant une section transversale conique qui agit de manière étanche sur un côté
externe de l'ouverture du récipient.
6. Couvercle à fermeture à vissage pour récipient selon la revendication 5, caractérisé en ce que la nervure annulaire qui agit sur l'extérieur de l'ouverture du récipient présente
une section transversale en forme de V.
7. Couvercle à fermeture à vissage selon l'une des revendications 4 à 6, caractérisé en ce que ladite matière plastique est du PET.
8. Couvercle à fermeture à vissage selon l'une des revendications 5, 6, ou 7, caractérisé en ce que ledit système d'étanchéité est un revêtement en matière plastique constitué d'EVA
et le reste du couvercle est constitué de PET.
9. Couvercle de fermeture pour récipient selon l'une des revendications précédentes,
avec une base de couvercle de fermeture et au moins deux saillies d'étanchéité espacées
radialement qui entourent la base du couvercle de fermeture, qui s'étendent à partir
de la base du couvercle de fermeture et qui sont en contact, lorsque le couvercle
de fermeture repose sur l'ouverture du récipient, avec l'ouverture du récipient et
étanchéifient donc l'intérieur du récipient par rapport à l'extérieur, caractérisé en ce que les deux saillies d'étanchéité sont conçues et interagissent de telle sorte que,
dans le cas d'une augmentation de la pression à l'intérieur du récipient, la suppression
du contact entre la saillie d'étanchéité radiale interne (27a) et l'ouverture du récipient
(1) provoque la suppression du contact entre la saillie d'étanchéité radiale externe
(27b) et l'ouverture du récipient (1) et de telle sorte qu'après la compensation de
la surpression, les deux saillies d'étanchéité (27a, 27b) se trouvent à nouveau de
manière étanche dans la zone correspondante de l'ouverture du récipient.
10. Couvercle de fermeture selon la revendication 9, caractérisé en ce que la saillie d'étanchéité radiale interne (27a) et l'ouverture du récipient (1) sont
en contact le long d'une zone directement adjacente à l'extrémité (11) de l'ouverture
du récipient (1).
11. Couvercle de fermeture selon l'une des revendications 9 ou 10, caractérisé en ce que la saillie d'étanchéité radiale interne (27a) est conçue comme une lèvre d'étanchéité
annulaire (31) qui entoure le couvercle, qui dépasse à l'intérieur du récipient (29)
et qui présente, sur le côté externe (33), un renflement (35) en face du côté interne
(7) de l'ouverture du récipient (1).
12. Couvercle de fermeture selon l'une des revendications 9 à 11, caractérisé en ce que la saillie d'étanchéité radiale externe (27b) est conçue comme une nervure annulaire
(37) présentant une section transversale en forme de W dont les pointes (39a, 39b)
sont en face de l'extrémité (11) de l'ouverture du récipient (1).
13. Couvercle de fermeture selon l'une des revendications 9 à 12, caractérisé en ce que la saillie d'étanchéité radiale externe (27b) est conçue comme une nervure annulaire
(37) présentant une section transversale en forme de V dont la pointe est en face
de l'extrémité (11) de l'ouverture du récipient (1).
14. Couvercle de fermeture selon l'une des revendications 9 à 13, caractérisé en ce qu'une saillie d'étanchéité supplémentaire (27c), conçue comme une nervure annulaire
(41) et présentant, sur son côté interne (43), un renflement (45) en face du côté
externe (9) de l'ouverture du récipient (1), s'étend à partir du bord de la base du
couvercle de fermeture (19).