U.S. patent application number 13/771241 was filed with the patent office on 2013-08-22 for plastic container.
This patent application is currently assigned to KRONES AG. The applicant listed for this patent is KRONES AG. Invention is credited to Jochen Forsthovel, Gerald Huttner, Alexander Schau.
Application Number | 20130213925 13/771241 |
Document ID | / |
Family ID | 48914940 |
Filed Date | 2013-08-22 |
United States Patent
Application |
20130213925 |
Kind Code |
A1 |
Forsthovel; Jochen ; et
al. |
August 22, 2013 |
PLASTIC CONTAINER
Abstract
Plastic container (1) being composed of a neck (3), a shoulder
(5), a body (4) and a base section (2), where the base section (2)
comprises at least two tie members (6a) extending from a central
area (8) to the side wall of the base (2). According to the
invention, the tie members (6b, 6c) and/or the function of the tie
members (6b, 6c) of the base (2) at least in certain areas extend
into the body section (4) or into the body (4) and the shoulder
section (5) of the plastic container (1).
Inventors: |
Forsthovel; Jochen;
(Regensburg, DE) ; Schau; Alexander; (Regensburg,
DE) ; Huttner; Gerald; (Vilseck, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
KRONES AG; |
|
|
US |
|
|
Assignee: |
KRONES AG
Neutraubling
DE
|
Family ID: |
48914940 |
Appl. No.: |
13/771241 |
Filed: |
February 20, 2013 |
Current U.S.
Class: |
215/370 ;
425/542 |
Current CPC
Class: |
B65D 1/0284 20130101;
B65D 2501/0036 20130101; B65D 1/0261 20130101; B29C 49/48 20130101;
B65D 1/0223 20130101; B65D 1/42 20130101 |
Class at
Publication: |
215/370 ;
425/542 |
International
Class: |
B65D 1/02 20060101
B65D001/02 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 20, 2012 |
DE |
10 2012 003 219.6 |
Claims
1. A plastic container (1), comprising a neck (3), a shoulder (5),
a body (4) and a base section (2), where said base section (2)
comprises at least two tie members (6a) extending from a central
area (8) to the side wall of said base (2), characterized in that
said tie members (6b, 6c) and/or the function of said tie members
(6b, 6c) of said base (2) at least in certain areas extend into
said body section (4) or into said body (4) and shoulder section
(5) of said plastic container (1).
2. The plastic container (1) according to claim 1, characterized in
that there are at least in certain areas circumferential grooves
(9, 10) provided in the peripheral direction (U) between said tie
members (6b, 6c) and/or above and/or below said tie members (6b,
6c) in said body (4) and/or said shoulder section (5).
3. The plastic container (1) according to claim 1, characterized in
that said tie members (6b, 6c) and/or said tie member function are
designed extending substantially in the longitudinal direction (L)
on the periphery of said container (1) from said base (2) towards
said neck (3) of said container (1).
4. The plastic container (1) according to claim 1, characterized in
that said base (2) comprises at least two, advantageously at least
three feet (7), and the number of said feet (7) is a multiple of
the number of said tie members (6a, 6b, 6c).
5. The plastic container (1) according to claim 4, characterized in
that, for two tie members (6a, 6b, 6c), there are 2, 4, 6, 8, 10 or
12 feet (7) and for three tie members (6a, 6b, 6c), 3, 6, 9 or 12
feet (7).
6. The plastic container (1) according to claim 1, characterized in
that said tie members (6a, 6b, 6c) respectively extend in a region
between two feet (7).
7. The plastic container (1) according to claim 1, characterized in
that said tie members (6a, 6b, 6c) extend across certain regions of
said bottle (1), in particular across said body region (4) or
across said body region and said shoulder region (5), or only
across parts of said body (4) or said shoulder (5).
8. The plastic container (1) according to claim 1, characterized in
that said tie members (6a, 6b, 6c) end immediately before or after
a labeling area of said body (4) and/or said shoulder (5) intended
for receiving at least one label.
9. The plastic container (1) according to claim 1, characterized in
that said tie members (6a, 6b, 6c) extend radially inwardly
transversely, in particular perpendicularly, to said
circumferential grooves (9, 10).
10. The plastic container (1) according to claim 1, characterized
in that said tie members (6a, 6b, 6c) form at least one stringer
which projects radially outwardly and at least in certain areas
runs through said circumferential grooves (9, 10).
11. The plastic container (1) according to claim 1, characterized
in that said circumferential grooves (9, 10) have varying depths in
said peripheral direction (U).
12. The plastic container (1) according to claim 11, characterized
in that said circumferential grooves (9, 10) at the locations, at
which they have the function of a tie member (6b, 6c), have a
distinctly shallower depth than in the intermediate areas.
13. The plastic container (1) according to claim 1, characterized
in that said tie members (6b) are formed in said labeling area (11)
such as to enable application of a label.
14. A blow mold for producing a plastic container from a plastic
preform, characterized in that said blow mold is suitable for
producing a plastic container according to claim 1.
15. A device for producing a plastic container from a plastic
preform by means of blow molding characterized in that said device
comprises blow molds for producing a plastic container according to
claim 14.
16. A plastic container (1) being composed of a neck (3), a
shoulder (5), a body (4) and a base section (2), where said base
section (2) comprises at least two tie members (6a) extending from
a central area (8) to the side wall of said base (2) characterized
in that in said base section, there are one or more reinforcement
grooves (15) provided extending in particular in the radial
direction.
Description
BACKGROUND OF THE INVENTION
[0001] The present invention relates to a plastic container which
can be used in particular for beverages. In the field of the
beverage-producing industry, more and more plastic containers,
especially for PET containers, have in recent times prevailed over
glass bottles. In this, the most different basic shapes or
cross-sections, respectively, of such plastic bottles are
known.
[0002] The terms (plastic) container, bottle or container shall in
the following be used as synonyms.
[0003] Such a plastic container generally comprises the following
areas: a base, a body, a shoulder and a neck, which merges into a
mouth opening.
[0004] The PET bottles initially used were usually relatively heavy
and thereby also quite stable.
[0005] However, efforts have in recent years been made in the
production of such containers to further reduce material
consumption, thereby cutting costs. This results in the walls and
the base of these containers being designed thinner and
thinner.
[0006] On the other hand, it is important to make sure that the
bottle wall, and especially the base of these containers is
designed strong enough to withstand, firstly, a filled bottle's own
weight, and secondly, also a possibly developing internal pressure,
especially with carbonated beverages. Strongly ribbed designs are
usually used in prior art for filling non-carbonated beverages.
[0007] Such ribs have the advantage that they provide good gripping
stability, and the necessary top load can be warranted arising, for
example, due to an axial load when palletizing.
[0008] However, relatively smooth-walled designs are always used
for bottling carbonated beverages, as strong ribbing, when
subjected to internal pressure, leads to a strong expansion in
height, in that the ribs are by the pressure drawn in length in an
accordion-like manner. This axial elongation leads to a destruction
of the design.
[0009] Such smooth-walled containers, however, are accompanied with
increased material consumption and moderate gripping stability.
[0010] In order to design the base of a container in a manner
resistant to pressure at a low weight, it is known to provide tie
members extending from the injection point up to the outer side of
bottles. These are used to keep the injection point up, so that the
bottle stands on its feet and does not start tilting.
[0011] WO 2006/067590 A1 describes such a bottle base made of
plastic. More precisely, reinforcement recesses are there provided
extending transversely in relation to the bottle base, where an
end-to-end main rib is disposed in the base. Here, said main ribs
extend up to an injection point of the container. By means of such
a design of the bottle base, increased stability can be achieved,
however, in particular in the area of the injection point, there
might possibly be resulting unfavorable stress distribution due to
the design of the respective reinforcement ribs.
[0012] DE 202008012290 U1 as well describes a base with such tie
members.
[0013] Though the base section is significantly more stable due to
the presence of the tie members, this measure has no effect on the
stability of the bottle in the central body or shoulder
section.
SUMMARY OF THE INVENTION
[0014] The present invention is therefore based on the object to
increase the stability of thin-walled plastic bottles above the
base and in particular to also increase pressure resistance. In
addition, also the material required for the production of these
plastic containers is to be further reduced. Furthermore, increased
gripping stability is to be achieved.
[0015] A plastic container according to the invention comprises a
neck, a shoulder, a central body and a base section, where the base
section comprises at least two tie members extending from a central
area to the side wall of the base. The tie members and/or the
function of the tie members of the base at least in certain areas
extend into the body section (4) or into the body (4) and the
shoulder section (5) of the plastic container (1).
[0016] A tension area always extends from the base section into the
body section. In advantageous embodiments, the tie member can even
be continued into the shoulder section.
[0017] Tie member in the context of the invention is understood as
being a reinforcing groove extending from the central region of a
container base, thus from the injection point, which is located
centrally on the longitudinal axis of the container, in a radial
direction in order to increase the stability of the base. A very
advantageous extension of the tie members is realized over known
prior art, in that the tie members of the base do not end at the
outer base edge, but extend beyond that into the outer cover
surface running substantially axial, in particular approximately
parallel to the container longitudinal direction.
[0018] In a preferred embodiment, there are all-around grooves
provided at least in certain areas in the peripheral direction
between the tie members and/or above and/or below the tie members
in the shoulder and/or body section.
[0019] Grooves are hereinafter understood to be in particular
recesses advantageously in certain areas extending straight or
wavy, which extend preferably towards the direction of the interior
of the container. By means of these grooves, profile enhancement is
achieved without there being the need for considerably increasing
the wall thickness. In this manner, the gripping stability of the
bottle is increased considerably.
[0020] Alternatively, however, other structural elements, such as
wedges, can also be provided to increase gripping stability.
[0021] The tie members and/or the tie member function are
preferably designed extending substantially in the longitudinal
direction on the circumference of the container from the base
towards the neck or the mouth of the container (1) Longitudinal
direction is understood to be the extension of the container from
the base in the direction of the mouth. The longitudinal direction,
when the container is standing upright, essentially runs
perpendicular with respect to the horizontal direction, but can
also deviate by up to an angle of 30.degree. from the perpendicular
direction.
[0022] The tie members are used in the region of the body to
significantly increase pressure resistance of the container.
[0023] The section profile of the tie member region can, in
particular in the area of the side wall of the base, have a
constant radius of curvature.
[0024] In a further advantageous embodiment, the base comprises at
least two, advantageously at least three feet, and the number of
feet is a multiple of the number of tie members.
[0025] Preferably, for two tie members, there are 2, 4, 6, 8, 10 or
12 feet and for three tie members 3, 6, 9 or 12 feet.
[0026] Preferably, a number of two or three tie members, but also
four, five, six or more tie members are conceivable according to
the invention. In particular 2 to 9 tie members, especially 3 to 6
tie members can be provided. In particular, the number of tie
members can be 3 or 6.
[0027] With only one tie member, the bottle would grow on one side
under internal pressure and become lop-sided. With four or more tie
members, the rib structure is interrupted too frequently, which
significantly decreases gripping stability.
[0028] Particularly preferably, the tie members respectively extend
in a region between two feet. This means, on each side of the tie
member there is always at least one foot.
[0029] In the base section, there can in particular be one or more
reinforcement grooves provided extending in particular in the
radial direction. By means of these, the base section can be
stabilized.
[0030] There can be at least one reinforcement groove provided
between each two tie members, in particular 1 to 5 reinforcement
grooves.
[0031] Reinforcement groove can herein be understood in particular
as being a recess or indentation advantageously in certain areas
extending straight or wavy, which extend preferably in the
direction of the interior of the container.
[0032] At least one reinforcement groove can in the radial
direction have a varying depth. The depth can therefore vary
depending on the distance from the central axis of the
container.
[0033] A foot rim interrupted by tie members and/or reinforcement
grooves can additionally be formed in the base section. The
container can in the intended use be placed on a planar surface in
the region of the foot rim. In other words, when the container is
placed upright, it can in the region of the foot rim rest on a
planar surface.
[0034] The foot rim can in the radial direction in particular have
a width of between 0 mm and 5 mm. If the width of the foot rim is
less than 0.5 mm, no planar resting surface is available any longer
and this can also be referred to a as a punctiform or line rest or
an annular rest.
[0035] At least one reinforcement groove can in the area of the
foot rim have the maximum depth. In this case, this can be in
particular an above-mentioned reinforcement groove of varying
depth.
[0036] In the area of the injection point, the wall of the plastic
container can with respect to the surrounding base section be
curved inwardly, thus forming a central dome. In this manner, the
stability of the base section can be further increased. The central
dome can in particular be immediately adjacent to the injection
point.
[0037] The base section can also be designed without a central
dome.
[0038] When a central dome is formed, then the tie members can
extend into the area of the central dome.
[0039] Alternatively, the tie members can tangentially peter out
prior to the area of the central dome, in particular to 0 mm depth,
i.e. to the level of the surrounding base area.
[0040] The central dome can have a constant radius of curvature.
The radial extension of the central dome can be less than the
radius of the annular rest. In other words, the central dome can be
spaced from the annular rest.
[0041] The central dome can in particular be adjacent to a further
region of the base, in which the wall of the plastic container is
curved inwardly, where the curvature of this region differs from
the curvature of the central dome. The further region can in
particular have a larger radius of curvature than the central
dome.
[0042] The central dome can in particular be adjacent to still an
additional region of the base, in which the wall of the plastic
container is curved inwardly, where the curvature of this region
differs from the curvature of the further region. Here, a step can
be formed between the different regions. The region of curvature of
the additional region can in particular be greater than that of the
further region. The additional region can then merge into the foot
rim.
[0043] Alternatively, the further region can also be connected via
a planar surface with the foot rim. In a longitudinal section, the
curved further region can therefore be connected via a straight
line with the foot rim.
[0044] Alternatively the wall can in the region between the
injection point and the foot rim have a constant curvature directed
inwardly. In this case, the base section is therefore within the
foot rim curved towards the interior of the container.
[0045] As described above, indentations in the form of
reinforcement grooves as well as tie members can be provided in the
curved or planar regions described.
[0046] In another advantageous embodiment, the tie members extend
across certain regions of the bottle, in particular across the body
section up into the shoulder section, or only across the body
region, or only across partial regions of the body or the shoulder.
These different embodiments allow creative freedom and enable
different designs, depending on the level of pressure resistance
that the bottle needs to have.
[0047] Preferably, the tie members end immediately before or after
a labeling area of the body and/or the shoulder, intended for
receiving at least one label.
[0048] Depending on the label, different requirements are
associated with the area in which the label is to be applied. For
example, it can be a hindrance to apply adhesive if a tie member
protrudes at the intended location.
[0049] Furthermore, it can be advantageous, however, to wet in
particular the surface created by the tie member with adhesive to
affix the label there. If the area intended for receiving a label
is located in the outer cover surface in the longitudinal extension
of the container in the plane of a tie member, then it functionally
forms a continuation of the tie member, even if no circumferential
ribbing exists. The wall thickness can then be limited to the
thickness of the tie member.
[0050] In a further advantageous embodiment, the tie members extend
radially inwardly transversely, in particular perpendicularly, to
the circumferential grooves.
[0051] Transversely in the context of the invention is understood
to mean that, if the circumferential grooves, when the container is
standing upright, extend at least in certain areas horizontally,
then the tie members extend in a direction disposed approximately
perpendicular thereto, i.e. in particular in the longitudinal
direction of the container.
[0052] Radially inward is understood to mean that the bottom of the
grooves is located closer to the bottle axis.
[0053] In a further preferred embodiment, the tie members form at
least one stringer which projects radially outwardly and at least
in certain areas extends through the circumferential grooves.
Stringer is now understood to be the reverse case, namely that a
groove extends radially projected outwardly from the inner side of
the container. This stringer can in its function also be continued
in the direction of the neck section, so that circumferential
transverse grooves are at the same time disposed therebetween.
[0054] Preferably, these circumferential grooves have varying
depths in the peripheral direction. Particularly preferably, the
circumferential grooves, at the locations at which they have the
function of a tie member, have a distinctly shallower depth as in
the intermediate areas. This is particularly advantageous because
grooves with a shallow depth are very pressure resistant. At
greater depths, the pressure resistance decreases and the bottle
lengthens under pressure influence.
[0055] In a further preferred embodiment, the tie members are
formed in the labeling area such as to enable application of a
label. Advantageously, the tie member is in the labeling area
designed more broadly in order to enable, for example, application
of adhesive. Though the tie member thereby further extends in the
axial direction of the container, the geometry, however, can be
changed in the area.
[0056] According to an alternative, the tie members can also lead
axially to the lowermost groove running circumferentially in the
peripheral direction. As a result, the groove bottom and the tie
member bottom are in one plane.
[0057] The invention also provides a plastic container, comprising
a neck, a shoulder, a body and a base section, where said base
section comprises at least two tie members extending from a central
area to the side wall of the base, and where the base section is
provided with one or more reinforcement groove extending in
particular in the radial direction.
[0058] The plastic container, in particular the base section can
comprise one or more of the above mentioned features.
[0059] Preferably, a blow mold is preferably provided for producing
a plastic container from a plastic preform with which a plastic
container according to the invention can be produced.
[0060] In a further advantageous embodiment, an apparatus for
producing a plastic container from a plastic preform by blow
molding is provided, which comprises blow-molding for producing a
plastic container according to the invention.
[0061] Blow molding, in particular stretch blow molding or
extrusion blow molding, is understood to be a method for
introduction of compressed air into a preform, thereby, in
particular with the aid of a stretching rod, forming a plastic
container. The blow mold, which is a negative of the plastic
container, is suitable to give the plastic container its desired
shape. Blow molding can be performed either on rotating carousels
or stationary linear machines.
BRIEF DESCRIPTION OF THE DRAWINGS
[0062] Further advantages and embodiments will become apparent from
the accompanying drawings:
[0063] FIG. 1A shows a view of a container according to the
invention from below towards the base;
[0064] FIG. 1B shows an alternative view of a container according
to the invention from below towards the base;
[0065] FIG. 2A shows a side view of a container according to the
invention;
[0066] FIG. 2B shows an alternative side view of a container
according to the invention;
[0067] FIG. 2C shows an alternative side view of a container
according to the invention;
[0068] FIG. 3A shows a side view of a further embodiment of a
container according to the invention;
[0069] FIG. 3B shows an alternative side view of a further
embodiment of a container according to the invention;
[0070] FIG. 3C shows an alternative side view of a further
embodiment of a container according to the invention;
[0071] FIG. 4A shows a plan view of the container according to the
invention;
[0072] FIG. 4B shows a plan view of an alternative embodiment of
the container according to the invention;
[0073] FIG. 5 shows a longitudinal section through a base section
of a container according to the invention;
[0074] FIG. 6 shows a plan view of the base of a container
according to the invention;
[0075] FIG. 7 shows a perspective view of the base of a container
according to the invention;
[0076] FIG. 8 shows a section profile of a tie member of a
container according to the invention;
[0077] FIG. 9 shows a longitudinal section through a part of the
base section of a container according to the invention;
[0078] FIG. 10 shows a side view of a part of a container according
to the invention;
[0079] FIG. 11 shows a perspective view of the base of a container
according to the invention;
[0080] FIG. 12 shows a longitudinal section through a base section
of a container according to the invention;
[0081] FIG. 13 shows a longitudinal section through a base section
of a container according to the invention;
[0082] FIG. 14 shows a perspective view of the base of a container
according to the invention; and
[0083] FIG. 15 shows a perspective view of a part of the body of a
container according to the invention.
DETAILED DESCRIPTION
[0084] FIGS. 1A and 1B show two embodiments of the base 2 of the
container 1 according to the invention. Here, the base 2 comprises
an injection point 8 in a central area. The tie members 6a
originating from there reach up to the outer wall region of the
base and serve to draw the injection point towards the container
cavity so that any tilting of the container is prevented.
[0085] These tie members 6a being arranged in the base section 2
increase the resistance of the base to pressure, so that carbonated
beverages can be bottled without any problems and without deforming
the base towards the outside.
[0086] FIG. 1A shows an advantageous embodiment of a base according
to the invention in which exactly two tie members 6a are extended
into the body section 4 of the container 1 (shown schematically by
the points 6b marked in thick black). Each tie member 6a is
arranged exactly in the space between two feet 7. In FIG. 1A, a
total of 12 feet are drawn in. The number of feet is advantageously
a multiple of the tie members. For two tie members, 2, 4, 6, 8, 10,
12 etc. feet are therefore to be provided according to the
invention.
[0087] An alternative advantageous embodiment of the invention is
shown in FIG. 1B. Here, three tie members are provided in the base
section, which can be extended into the body 4 and/or shoulder
section 5. For three tie members, it is advantageous to provide 3,
6, 9, 12, etc. feet. In the embodiment shown in FIG. 1B, 9 feet are
provided.
[0088] FIG. 2A, FIG. 2B and FIG. 2C show side views of an
advantageous embodiment of the invention. There, a container 1 is
shown comprising a neck section 3, a body section 4, a shoulder
section 5 and a base section 2.
[0089] There, in the region of the central body 4, grooves 9, 10
are applied, enabling increased gripping stability of the container
1. Furthermore, the tie members 6a of the base 2 project up into
the body section 4 of the container 1. The reference numeral 6b
shows this extended tie member. The extension of the tie member 6b
in the body section also there allows for embodying the container
in a more pressure resistant manner. Thereby, the functions of
gripping stability and pressure resistance are united in one
container 1 by the two different elements of the grooves 9, 10 and
the tie members 6b.
[0090] The tie member 6b drawn in can here, on the one hand, at
least partially be formed as a groove extending in the longitudinal
direction L, i.e. substantially perpendicular to the peripheral
direction U of the container 1 or in the shape of a radially
outwardly projecting bar or rib, respectively. In this, it is
irrelevant whether the tie members 6b are extended visibly or only
in their function in the direction of the neck section.
[0091] For extending the function, as shown in FIG. 2B, it is
possible to provide the grooves 10 located in the labeling area 11
of the container with varying depth in the peripheral direction U.
More preferably, the grooves 10 have a shallower depth in the
extension of the tie member 6b than in the regions between the tie
members 6b, in order to there create increased stability.
[0092] FIG. 2B shows an alternative embodiment very similar to that
of FIG. 2A, with the difference being that the tie member 6b in
FIG. 2B projects up into the shoulder section 5 (see tie member
6c).
[0093] FIG. 2C shows a further alternative embodiment. There, the
tie member 6b itself and not only the function of the tie member 6b
is directed through the labeling area 11. The entire tie member 6
in FIG. 2 C therefore extends from the injection point 8 across the
tie member 6a in the base section 2, as well as the tie member 6b
in the body section 4 up to the shoulder section 5, in which the
tie member 6c is shown.
[0094] All three embodiments are containers with two tie members
6a, 6b, (6c) and six feet 7.
[0095] FIG. 3A, FIG. 3B and FIG. 3C show side views of an
alternative embodiment of the invention.
[0096] In contrast to FIG. 2A, FIG. 2B and FIG. 3C here each show a
container 1 with three tie members 6b and nine feet 7. The two
embodiments shown with two and three tie members 6b therefore make
sense because polygons (the triangle is formed when mentally
connecting the tie members in the inside of the bottle with
straight lines) are defined geometrically only up to a corner
number of three. However, four, five, six or more tie members are
conceivable, however, the stability is thereby then again
reduced.
[0097] FIG. 3A shows a representation similar to FIG. 2B. FIG. 3C
is again very similar to FIG. 2C.
[0098] FIG. 3B, however, shows an alternative embodiment in which
the tie member 6b can only in certain areas be seen in the labeling
area 11. Here again, however, the function of the tie member 6 is
extended into the shoulder section 5, it is merely another
embodiment of the tie member 6 in technically different design.
[0099] Furthermore, it is also conceivable to apply the design of
FIG. 3B for a bottle 1 as shown in FIG. 2A/B/C, or the design of
FIG. 2A in a bottle 1 as shown in FIG. 3A/B/C.
[0100] FIG. 4A and FIG. 4B each also show a plan view of the
container 1 according to the invention.
[0101] FIG. 4A shows a plan view of a container 1 with three tie
members 6. The tie members are here each arranged at the same
distance to each other distributed around the circumference. By
mentally connecting one tie member 6 with the other two, an
isosceles triangle results having symmetrical angles. The angular
symmetry is represented by the axes A1, A2 and A3, each extending
from a tie member 6 through the center axis of the container 1.
[0102] Such a polygon is geometrically defined and particularly
well adapted to receive pressure without deforming.
[0103] FIG. 4B shows a plan view of a container 1 with two tie
members 6. The two tie members are here arranged symmetrically with
respect to the symmetry line A4.
[0104] It is evident in both FIG. 4A and FIG. 4B that the tie
members 6c were extended up into the shoulder section 5.
[0105] How the tie members 6b are designed in the body section 4
cannot be seen using this representation. But all possible
embodiments shown in FIGS. 2A, 2B, 2C, 3A, 3B, 3C are
conceivable.
[0106] FIG. 5 shows a longitudinal section through a container
according to the invention, in particular its base section. Here,
the wall in the region 13 has an inwardly directed curvature. The
region 13 can in particular be rotationally symmetrical to the
longitudinal axis and be adjacent to the injection point or a
central dome. The region 13 is connected to the foot rim 12 of the
container across a planar surface 14. In the longitudinal section
of FIG. 5, this planar surface 14 forms a straight line.
[0107] FIG. 6 shows a plan view of the base of a container
according to the invention. It shows in particular an annular rest
12 and a central dome 16. Three tie members 6a originate from the
base center and extend continuously upwardly to the side wall of
the base. Reinforcement grooves 15 are shown between the tie
members 6a. The annular rest 12 is interrupted by the tie members
6a and the reinforcement grooves 15.
[0108] FIG. 7 shows a respective perspective view of the container
of FIG. 6 according to the invention. FIG. 11 as well shows a
respective perspective view, but at a slightly different
perspective angle.
[0109] As can be gathered in particular from FIG. 11, the tie
members in this example run into the central dome 16. In principle,
the tie members 6a could also not run into the central dome 16, but
tangentially peter out before, meaning outside of the central dome
16, to 0 mm depth.
[0110] Embodiments in which no central dome is formed are also
possible.
[0111] The reinforcement grooves 15 can in the area of the foot rim
12 be deepest.
[0112] According to one embodiment, the reinforcement grooves 15
can have a radially varying depth, therefore do not run parallel to
the outer contour of the base. The depth of the reinforcement
grooves 15 can therefore vary depending on the distance from the
central axis of the container. This embodiment is illustrated in
FIG. 9.
[0113] The reinforcement grooves 15 can likewise extend into the
central dome, and in particular into the end of the tie members in
the injection point. FIGS. 6 and 11, however, illustrate the
alternative, according to which the reinforcement grooves 15 end
outside the central dome 16, i.e. do not reach into the central
dome 16.
[0114] The section profile of the tie member regions can have a
constant radius (radius of curvature). This is illustrated in FIG.
8. This can in particular be the case in the area of the side wall
of the base.
[0115] As shown in FIG. 10, the tie members 6b run on the outer
side of the body section through a plurality of circumferential
grooves. This has already been explained in connection with FIG.
2A.
[0116] The tie member bottom and the bottom of the circumferential
grooves can in particular be located in one plane.
[0117] According to an alternative shown in FIG. 14, the tie
members 6a can also tangentially run into or end in the lowermost
circumferential groove 22 on the outer side of the body
section.
[0118] As shown in FIG. 15, it is also possible that the tie
members 6b on the outer side of the body section run through a
plurality of circumferential grooves such, that the groove geometry
of the intersected grooves remains. The tie member 6b and the
circumferential groove 10 are in this area therefore arranged at
the same depth (in the groove bottom). The groove 10 can be in this
area therefore experience flattening between 0.1 mm and 0.3 mm. The
variability of the groove 10 is here given in the upper lateral
region. The geometry of the bottom of the groove is not
interrupted.
[0119] FIG. 12 shows a longitudinal section through a base section
of a further container according to the invention. It is shown
therein, how a central dome is adjacent to a partial region 18 of
the base section which has a constant radius of curvature and
connects the central dome with the foot rim.
[0120] FIG. 13 shows a longitudinal section through a base section
of a further container according to the invention. This shows
adjacent to the central dome 16, a first region 19 having a radius
of curvature which is greater than that of the central dome 16. A
first region 19 is followed by a second region 20, which can be
either planar or has a radius of curvature which is greater than
that of the first region 19. In this manner, a step 21 is formed
between the first region 19 and the second region 20. Such a step
is also formed between the central dome 16 and the first region 19.
The second region 20 then merges into the foot rim of the
container.
[0121] The dome 16 can in particular have a constant radius of
curvature.
[0122] A container described above can be used in particular for an
intended internal pressure of 0.1 bar to 1.5 bar.
[0123] All the features disclosed in the application documents are
claimed as features being essential to the invention, to the extent
that they are individually or in combination novel over prior
art.
LIST OF REFERENCE NUMERALS
[0124] 1 container [0125] 2 base [0126] 3 neck [0127] 4 body [0128]
5 shoulder [0129] 6 tie member [0130] a. tie member in the base
section [0131] b. tie member in the body section [0132] c. tie
member in the shoulder section [0133] 7 foot [0134] 8 injection
point [0135] 9 groove [0136] 10 groove with varying depth [0137] 11
labeling area [0138] 12 foot rim [0139] 13 curved area [0140] 14
planar area [0141] 15 reinforcement groove [0142] 16 central dome
[0143] 17 section profile tie member [0144] 18 partial region of
the base section [0145] 19 first region [0146] 20 second region
[0147] 21 step [0148] 22 lowermost circumferential groove [0149] A1
axis [0150] A2 axis [0151] A3 axis [0152] A4 axis [0153] U
peripheral direction [0154] L longitudinal direction
* * * * *