U.S. patent application number 13/376967 was filed with the patent office on 2012-06-07 for conical packaging having improved tearable opening.
This patent application is currently assigned to Huhtamaki Ronsberg ZN Der Huhtamaki Deutschland GMBH & Co. KG. Invention is credited to Tobias Fackler, Isabell Thurk.
Application Number | 20120138670 13/376967 |
Document ID | / |
Family ID | 42556470 |
Filed Date | 2012-06-07 |
United States Patent
Application |
20120138670 |
Kind Code |
A1 |
Thurk; Isabell ; et
al. |
June 7, 2012 |
CONICAL PACKAGING HAVING IMPROVED TEARABLE OPENING
Abstract
The present invention relates to a conical packaging, in
particular a pointed conical packaging (10), preferably for food,
such as ice cream in wafers and the like, comprising a packaging
wall that tapers conically starting from a removal end (10a) along
a packaging axis (V), wherein the packaging wall has a tearing aid
(16, 18) having a first material weakening (16) of the packaging
wall material and having a second material weakening (18) extending
at a distance to the first material weakening (16) in such a way
that the first (16) and the second material weakening (18) define a
tearable strip (14) therebetween, wherein the tearable strip (14)
extends in the direction of the packaging axis (V) starting from
the removal end (10a) of the packaging (10) with a tearable
component and ends in a axially central area (A) of the packaging
(10).
Inventors: |
Thurk; Isabell; (Kempten,
DE) ; Fackler; Tobias; (Legau, DE) |
Assignee: |
Huhtamaki Ronsberg ZN Der Huhtamaki
Deutschland GMBH & Co. KG
Ronsberg/Allgaeu
DE
|
Family ID: |
42556470 |
Appl. No.: |
13/376967 |
Filed: |
June 8, 2010 |
PCT Filed: |
June 8, 2010 |
PCT NO: |
PCT/EP10/58004 |
371 Date: |
February 22, 2012 |
Current U.S.
Class: |
229/244 |
Current CPC
Class: |
B65D 3/262 20130101;
B65D 3/266 20130101; B65D 85/78 20130101; B65D 3/06 20130101; B65D
3/264 20130101 |
Class at
Publication: |
229/244 |
International
Class: |
B65D 17/00 20060101
B65D017/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 8, 2009 |
DE |
10-2009-024-194.9 |
Claims
1-18. (canceled)
19. A pointedly conical packaging (132) for food, comprising: a
packaging wall (10; 110; 210; 310) which tapers conically starting
from an axial removal end (10a; 110a; 210a; 310a) along a packaging
axis (V), the packaging wall (10; 110; 210; 310) having a tear aid
(16, 18; 116, 118; 216, 218; 316, 318) with a first material
weakening (16; 116; 216; 316) of the packaging wall material and
with a second material weakening (18; 118; 218; 318) running at a
distance from the first material weakening (16; 116; 216; 316) such
that the first material weakening (16; 116; 216; 316) and the
second material weakening (18; 118; 218; 318) define between them a
tear strip (14; 114; 214; 314), wherein the tear strip (14; 114;
214; 314) extends starting from the removal end (10a; 110a; 210a;
310a) of the packaging (132) with a tear component in the direction
of the packaging axis (V) and ends in an axial centre region (A) of
the packaging (132), wherein the packaging (132) has in the axial
centre region (A) a third material weakening (22; 122; 222; 322)
which extends around the packaging axis (V) in the peripheral
direction (U) only over part of the periphery of the packaging
wall.
20. Conical packaging according to claim 19, wherein the tear strip
(14; 114; 214; 314) is located at least in portions, preferably
with its longitudinal end region remote from the removal end (10a;
110a; 210a; 310a), and more preferably completely in the peripheral
extension region of the third material weakening (22; 122; 222;
322).
21. Conical packaging according to claim 19, wherein the tear strip
(14; 114; 214; 314) ends at the third material weakening (22; 122;
222; 322) with its longitudinal end remote from the removal end
(10a; 110a; 210a; 310a).
22. Conical packaging according to claim 19, wherein the first
material weakening (116) and the second material weakening (118)
are of different lengths.
23. Conical packaging according to claim 22, wherein a material
weakening (116) consisting of the first and second material
weakenings (118) extends as far as the third material weakening
(122) and preferably ends there, and in that the respective other
material weakening (118) is shorter than the one material weakening
(116) and ends at a distance (a) from the third material weakening
(122).
24. Conical packaging according to claim 23, further comprising a
fourth material weakening (136) which runs, preferably runs in a
closed manner, in the peripheral direction (U) starting from the
longitudinal end of the respective other material weakening (118),
preferably parallel to the third material weakening (122).
25. Conical packaging according to claim 19, wherein the first
material weakening (16; 116; 216; 316) and the second material
weakening (18; 118; 218; 318) run in a weakening path direction
which has a component in the direction of the packaging axis (V)
and is preferably located in a common plane with the packaging axis
(V).
26. Conical packaging according to claim 25, wherein the first
material weakening (216; 316) and the second material weakening
(218; 318) run in a direction which comprises a component in the
direction of the packaging axis (V) as well as a component in the
peripheral direction (U).
27. Conical packaging according to claim 19, wherein the tear strip
(214) extends in a meander shape at least in portions, preferably
over its entire length.
28. Conical packaging according to claim 19, further comprising a
lid (134) which is retained, preferably positively, on the
packaging wall (210).
29. Conical packaging according claim 19, wherein the packaging
wall material comprises a paper layer (42).
30. Conical packaging according to claim 19, wherein the packaging
wall material comprises a laminate (40) consisting of at least two
layers (42, 44, 46), of which at least one layer (46) has the first
(16) and the second (18), preferably also the third (22) and
optionally the fourth material weakening.
31. Conical packaging according to claim 30, wherein the laminate
(40) comprises a barrier layer (44), preferably a metal layer, more
preferably an aluminium layer which is advantageously free from
material weakenings.
32. Conical packaging according to either claim 30, wherein the
laminate (40) has at least one plastics material layer (46),
preferably consisting of polypropylene and/or polyethylene and/or
PLA and/or polyethylene terephthalate, at least one plastics
material layer (46) having material weakenings (48).
33. Conical packaging according to claim 19, wherein a material
weakening (16, 18, 22; 116, 118, 122, 136; 216, 218, 222; 316, 318,
322) is a thin place in the material or an interruption in the
material, preferably a perforation (48).
Description
[0001] The present invention relates to a conical packaging, in
particular to a pointedly conical packaging, preferably for food,
such as ice cream in cones and the like, comprising a packaging
wall which tapers conically starting from an axial removal end
along a packaging axis, the packaging wall having a tear aid with a
first material weakening of the packaging wall material and with a
second material weakening running at a distance from the first
material weakening such that the first and second material
weakenings define between them a tear strip.
[0002] A generic packaging is known from EP 0 226 958 A. In the
known bag-like, pointedly conical packaging, a tear strip is formed
which is defined by two substantially parallel perforations, as the
material weakenings, encircling the packaging axis in the
peripheral direction and which can be completely torn off from the
conically tapering packaging wall in an axial centre region of the
packaging, so that after the tear strip has been completely torn
off, there remains an upper packaging part in the form of a
truncated cone and a conical lower packaging part which is arranged
around the width of the tear strip at a distance from said tear
strip.
[0003] A disadvantage of the known packaging is that the upper
packaging part which usually has to be removed in this type of
packaging to reach the packaged product remains on the packaged
contents even after the tear strip has been torn off. Since this
upper packaging part is itself shaped as a truncated cone and
tapers along the packaging axis starting from the greatest cross
section of the packaging, the upper packaging part cannot be
readily pulled off along the packaging axis from the packaged
product which is usually also conical and, in turn, has to be
removed in a laborious manner by further opening actions.
[0004] EP 1 484 251 A discloses a pointedly conical packaging in
which an intersecting line is provided which encircles the
packaging axis in the peripheral direction, along which
intersecting line an upper packaging part which thus includes the
region of relatively large packaging cross sections, can be unwound
in the peripheral direction and, in so doing, can be torn off from
a lower conical packaging part.
[0005] A similar pointedly conical packaging is known from DE 100
56 811 A. In this packaging, a desired tear line is made in the
packaging wall around the packaging axis in the peripheral
direction by laser machining so that, here again, by means of a
tear tab on the peripheral edge of the conical packaging wall
formed by winding, an upper portion, thus associated with larger
packaging cross sections, of the packaging wall can be separated
from a lower packaging part by unwinding around the packaging
axis.
[0006] Reference is also made to U.S. Pat. No. 4,657,142 A which
shows a conical packaging, in which, similarly to the previously
mentioned generic EP 0 226 958 A, a tear strip is provided which is
defined by two substantially parallel material weakenings and which
runs around the packaging axis in the peripheral direction, and
after the tear strip has been removed, two partial packaging walls
provided at a distance from one another remain on the packaged
product.
[0007] Starting from the prior art described above, the object of
the present invention is to provide a conical packaging of the type
mentioned at the outset which can be opened more easily than the
prior art packagings.
[0008] This object is achieved according to the invention in that
in a packaging of the type mentioned at the outset, the tear strip
runs with a tear component in the direction of the packaging axis
starting from the removal end of the packaging and ends in an axial
centre region of the packaging.
[0009] Starting from the axial removal end, by removing the tear
strip along the two material weakenings defining said tear strip,
the conical packaging according to the invention makes it possible
to provide a gap which starts from the removal end located outside
the axial centre region, i.e. from the end of the largest cross
section of the conical packaging and which also extends into the
axial centre region in the direction of the packaging axis.
[0010] Due to the fact that the tear strip ends approximately in
the axial centre region of the packaging, i.e. in a region of
approximately 15-85% of the packaging height, preferably 30-70% of
the packaging height, more preferably 40-60% of the packaging
height, which region excludes the axial packaging ends including
the removal end and extends symmetrically around the axial centre
of the packaging, it is initially possible for a material
connection of the conical packaging to remain during opening, i.e.
the tear strip is actuated without the packaging disintegrating
into several pieces.
[0011] Starting from the gap formed by the tear strip, the axial
opening region of the packaging, i.e. the axial region along which
the tear strip extends or did extend, can then be folded over along
an imaginary peripheral line which joins the ends, remote from the
removal end, of the tear strip or of the gap produced by the tear
strip, so that the hand of a person who is holding the conical
packaging by its gap-free axial portion can grip the gap-free axial
region, which is still intact, of the conical packaging, while the
hand is surrounded radially on the outside by the folded-over
packaging material in the manner of a cuff so that, for example in
the case of packaged ice cream in cones, the hand is protected from
being soiled by melting ice cream by the folded-over packaging
part.
[0012] In the present application, the term "removal end" describes
the longitudinal end of the conical packaging with the larger
packaging cross section. In principle, it is conceivable for the
packaged product to be removed from this end through an opening in
the conical packaging, even if it is generally the case, as
described above, that the material connection of the packaging is
destroyed at least in portions and the content of the packaging is
exposed by deforming or even by removing some of the packaging
wall.
[0013] If it is desired to fully remove the tear strip from the
packaging according to the invention, to facilitate this removal,
provision can be made for the packaging to have in the axial centre
region a third material weakening which extends around the
packaging axis substantially in the peripheral direction or at
least with a component extending in the peripheral direction. In
this respect, the third material weakening can preferably define a
longitudinal end of the tear strip, which end is remote from the
removal end of the packaging.
[0014] To facilitate the folding-over procedure of the opening
region which is modified by the tearing of the tear strip and by
gap formation, of the packaging, provision can be made for the
dimension of the third material weakening to be greater in the
peripheral direction than the width of the tear strip in the
peripheral direction.
[0015] To further facilitate the folding-over procedure of the
packaging opening region, modified by gap formation by the tear
strip, provision can be made for the third material weakening to
run around the packaging, preferably in a closed manner. In this
respect, the third material weakening, as known, for example from
EP 1 484 251 A, can also assist the consumer not only in folding
the packaging opening region, which has a gap, over the third
material weakening to form a cuff, but also in tearing it off from
the axially adjacent, intact, gap-free packaging portion.
[0016] In other words, the complete tear-off ability of the tear
strip from the packaging can also be ensured in that the tear strip
is located at least in portions, preferably with its longitudinal
end region remote from the removal end, more preferably completely
in the peripheral extension region of the third material weakening.
The third material weakening can then form a desired tear point of
the tear strip which extends in the width direction of the tear
strip.
[0017] Whereas tear strips known from the prior art usually extend
from one peripheral edge to another of the piece of material
forming the packaging, the tear strip of the packaging of the
present invention starts at the axial removal end, i.e. at an axial
edge of the packaging, and preferably does not end at a peripheral
edge or at another axial edge of the packaging, but instead
preferably ends "in the material". The complete removal of the tear
strip can again be ensured in that it ends with its longitudinal
end, remote from the removal end, at the third material weakening.
Consequently, the tear strip can initially be torn along the first
and second material weakenings and then along the third material
weakening.
[0018] A particularly advantageous opening behaviour of the
packaging according to the invention can be achieved in that the
first and second material weakenings are of a different length.
Consequently, it is possible for the tear strip to be initially
torn along its extension direction, thus producing a gap which also
extends in the axial direction, on the axial portion which has
greater packaging cross sections and, due to the shorter
configuration of one of the two material weakenings, the tear strip
remains in material connection with the opening region, having a
gap, of the packaging.
[0019] When a material weakening consisting of the first and second
material weakenings extends as far as the third material weakening
and preferably ends there, and when the respective other material
weakening is shorter than the one material weakening and ends at a
distance from the third material weakening, the tear strip which
was initially separated from the rest of the packaging along its
extension direction, can be further used, in material connection
with the packaging opening region which then has a gap, to
introduce a tear in the packaging along the third material
weakening and to thus separate the packaging opening region which
has a gap from the axially adjacent, intact, gap-free packaging
portion, so that the packaging can be conveniently opened
substantially by a single continuous movement, preferably with an
initially mainly axial movement component and then with a mainly
peripheral movement component, and an intact packaging portion
remains in the consumer's hand, while a cohesive piece is obtained
as the packaging waste material which can be disposed of in a
simple manner.
[0020] Furthermore, it is possible for the tear strip to not only
extend in the axial direction along the packaging axis, but for a
further tear strip portion which extends substantially in the
peripheral direction to adjoin, preferably integrally, a tear strip
portion which also extends at least in the axial direction.
[0021] For this, it can be provided that the conical packaging of
the present invention comprises a fourth material weakening which
extends, preferably circulates, substantially in the peripheral
direction starting from the longitudinal end of the respective
other shorter material weakening consisting of the first and second
material weakenings, preferably parallel to the third material
weakening.
[0022] To make it easier to grip the tear strip, the conical
packaging can be developed such that provided on the longitudinal
end, closer to the removal end, of the tear strip, is a grip tab
which projects above an edge of the packaging, preferably above the
axial edge of the packaging on the removal end.
[0023] Tearing with a tear force which is as constant as possible
can advantageously be achieved in that the first and second
material weakenings run in parallel, at least in portions, and
preferably completely.
[0024] The basic objective of the present invention is to provide,
with the tear strip, an opening region in the packaging in the
region of relatively large cross sections of the packaging, in
which opening region the packaging wall has a gap which also
extends at least in the axial direction and to maintain an intact
packaging portion which is adjacent axially, i.e. in the direction
of the packaging axis, in the region of relatively small packaging
cross sections, into which packaging portion the gap formed by the
tear strip does not extend.
[0025] For this purpose, it can be provided that the first and
second material weakenings extend in a weakening path direction
which has a component in the direction of the packaging axis. In
the simplest case, both the first and the second material
weakenings are located in a common plane with the packaging axis.
The result of this is a substantially straight and thus, as far as
possible, a short tear strip which tapers away from the removal end
along the packaging axis and which has no other running component
than an axial component on the conical packaging wall.
[0026] However, it is also possible, in order to increase the gap
surface area formed by the tear strip, to make the tear strip run
in an approximately spiral shape. For this purpose, or also for
other courses of the tear strip, it can be provided that the first
and second material weakenings run in a direction which has a
component in the direction of the packaging axis as well as a
component in the peripheral direction.
[0027] Furthermore, it is possible for the tear strip to run in a
meander shape at least in portions, and preferably over its entire
length.
[0028] In principle, it is possible for the packaging wall material
to have such a great packaging excess in the region of the removal
end of the packaging that the opening cross section of the conical
packaging can be closed in the manner of a lid by the excess
packaging.
[0029] However, for filling and opening the packaging, it has
proved to be more advantageous if the conical packaging has a lid
which is configured separately from the conical packaging wall and
is retained on the packaging wall. The lid is preferably retained
positively on the packaging wall, for example by folding the
packaging wall over at the removal end of the packaging radially
inwards, i.e. towards the packaging axis, as a result of which the
resulting fold comes to rest on the lid and thus prevents the lid
from lifting off.
[0030] For the production of a cost-effective packaging, the
packaging wall material can comprise a layer of paper. Paper layers
have the advantage of low restoring forces after the deformation
thereof.
[0031] This paper layer can have the material weakenings mentioned
above.
[0032] To more effectively protect the packaging content against
external influences, provision can be made for the packaging wall
material to comprise a laminate consisting of at least two layers.
In this respect, it can be possible for only some of the layers of
the laminate to have the above-mentioned material weakenings so
that at least one laminate layer is substantially intact and
unweakened.
[0033] In order to be able to preserve the food more effectively
which is preferably packaged in the conical packagings described
here, the laminate can comprise a barrier layer, for example.
Included here as barrier layers of this type are metal layers, in
particular metallised layers, such as an aluminium layer, metal
oxide layers, such as an aluminium oxide layer or a silicon oxide
layer, or also an ethylvinyl alcohol layer. The barrier layer is
preferably free from material weakenings so that its barrier
function is not impaired. The barrier layer is preferably
evaporated onto a carrier layer.
[0034] To impart stability to the conical packaging and/or to
improve its hygienic characteristics, the laminate can have a
plastics material layer, in which case at least one plastics
material layer of the laminate preferably has material weakenings.
Plastics material layers can be provided particularly easily with
material weakenings, for example by laser machining. Included as a
material for the at least one plastics material layer are
polypropylene and/or polyethylene and/or PLA (polylactic acid)
and/or polyethylene terephthalate (PET).
[0035] If, as in a preferred embodiment, the laminate has a paper
layer, a plastics material layer and a metal layer applied onto the
plastics material layer, only the plastics material layer needs to
have material weakenings for a correct tear guidance of the tear
strip and, if appropriate, for introducing further desired tears.
In addition, the paper layer can also have material weakenings.
[0036] A thin place in the material, for example, as can be
produced by stamping is considered as a material weakening.
[0037] Particularly, but not only, when the packaging wall material
is a laminate, the material weakening can also be an interruption
in the material, such as a perforation. In this respect, it
generally suffices when one of several layers is perforated, or it
is advantageous when at least one layer, more preferably the
above-mentioned barrier layer, is free from material
weakenings.
[0038] It is also possible, for tear guidance, to use plastics
material layers with plastics materials drawn out in one
direction.
[0039] On the removal end, the packaging preferably comprises tear
aids, for example in the form of notches which are provided to
facilitate the tearing initiation on the longitudinal edges, on the
removal end side, of the first and second material weakenings.
[0040] In the following, the present invention will be described
with reference to embodiments in the accompanying drawings, in
which:
[0041] FIG. 1 shows a packaging wall of a first embodiment of a
pointedly conical packaging according to the invention,
[0042] FIG. 2 shows the planar raw material to form the packaging
wall of FIG. 1,
[0043] FIG. 3 shows a packaging wall of a second embodiment of the
present invention,
[0044] FIG. 4 shows the planar raw material to form the packaging
wall of FIG. 3,
[0045] FIG. 5 shows a conical packaging wall of a third embodiment
of the present invention,
[0046] FIG. 6 shows a conical packaging wall of a fourth embodiment
of the present invention,
[0047] FIG. 7 is a cross-sectional view of a laminate, from which
the packaging walls of FIG. 1 to 6 can be formed.
[0048] In FIG. 1, a packaging wall of a pointedly conical packaging
according to the invention is generally designated by reference
numeral 10. The pointedly conical packaging wall 10 extends along a
packaging axis V and tapers from its axial removal end 10a, based
on the packaging axis V, having a large packaging cross section to
a point 10b at the longitudinal end, axially opposed to the removal
end 10a, of the packaging wall 10.
[0049] The packaging which is constructed from the packaging wall
10 and can be formed by folding over the axial edge 10c after a lid
(not shown in FIG. 1) has been previously introduced into the
removal opening 12 formed at the removal end 10a (see also FIG. 3),
extends along the packaging axis V over the height h. Extending
symmetrically around the axial centre of the packaging 10 at h/2 is
an axial centre region A which, in the example shown in FIG. 1,
occupies approximately 70% of the total height h.
[0050] Starting from the removal end 10a, located outside the axial
centre region A, of the packaging wall 10 and also from the
packaging formed therefrom, a tear strip 14 runs into the axial
centre region A of the packaging on the conical packaging wall 10
exclusively in the axial direction, and ends there. The tear strip
14 is defined on one side by a first material weakening 16 and on
the other side by a second material weakening 18 in the peripheral
direction U around the packaging axis V.
[0051] In the example illustrated in FIG. 1, the first and second
material weakenings 16 and 18, respectively, extend substantially
parallel to one another, so that the tear strip 14 has
substantially the same width over its longitudinal extent. However,
this does not have to be the case.
[0052] To make it easier to grip the tear strip 14, a grip tab 20
which extends axially over the removal end 10a of the packaging
wall 10 is preferably formed on the longitudinal end, closer to the
removal end 10a, of the tear strip 14.
[0053] At its opposite longitudinal end, i.e. remote from the
removal end 10a of the packaging wall 10, the tear strip 14 can
simply end in the material, in other words it ends where the
material weakenings 16 and 18 end, which define it in the
peripheral direction U.
[0054] To allow the tear strip 14 to be torn off completely from
the rest of the packaging wall 10, a third material weakening 22
can be provided which extends in the peripheral direction U and at
which the tear strip 14 preferably ends. This means that the first
and second material weakenings 16 and 18, respectively, extend as
far as the third material weakening 22 in the illustrated
embodiment. The third material weakening 22 advantageously extends
at least over the width of the tear strip 14, so that the tearing
of the tear strip 14 can be ensured along the third material
weakening 22.
[0055] The axial extension of the tear strip 14 defines on the
packaging wall 10 and thus on the packaging itself, formed
therefrom, an opening region 24 which extends in the axial
direction starting from the removal end 10a as far as the axial
longitudinal end of the tear strip 14.
[0056] Adjoining this opening region 24 in the axial direction is a
tear strip-free and thus gap-free packaging portion 26 which, on
opening the packaging, remains substantially intact.
[0057] After the tear strip 14 has been torn off, the packaging
wall material of the opening region 24 can be folded over the third
material weakening 22, which advantageously runs in a closed manner
in the peripheral direction U, according to the arrows M to form a
cuff so that the consumer's hand can grip the intact packaging
portion 26 and is covered radially on the outside by the opening
region 24 of the packaging which is folded over in the manner of a
cuff.
[0058] In this way, the consumer's hand can advantageously be
protected against melting ice cream which is dripping or running
down and is preferably packaged in the conical or pointedly conical
packagings discussed here.
[0059] FIG. 2 shows the packaging wall 10 in a developed view as a
so-called planar blank.
[0060] A folding flap 30 is shown which is configured on a
peripheral edge 28 and is made to overlap the other opposite
peripheral edge 32 to form a so-called "lap seal" join and is then
joined permanently to the folding flap 28.
[0061] The lap seal join can be seen in FIG. 1 in the inner region
of the packaging wall 10 immediately on the right of the packaging
axis V.
[0062] The first to third material weakenings 16, 18 and 22,
respectively, are preferably formed by perforations, as is
explained further below in connection with FIG. 7.
[0063] FIG. 3 shows a second embodiment of a conical packaging
according to the invention.
[0064] FIG. 3, in which the same and functionally identical
components and portions of components are provided with the same
reference signs as in FIGS. 1 and 2 except they are increased by
100, will only be described insofar as it differs from the first
embodiment of FIGS. 1 and 2. Otherwise, reference will be made
explicitly to the descriptions of FIGS. 1 and 2 for the description
of FIG. 3.
[0065] A complete embodiment of a packaging 132 according to the
invention with a radially inwardly folded-over fold on the removal
end 110a of the packaging wall 110 can be seen on the right-hand
side of FIG. 3. The folded-over folding edge advantageously engages
over a lid 134 which covers the removal opening 112 of the
packaging 132 or of the packaging wall 110. As a result, the lid
134 is retained positively on the packaging wall 110.
[0066] This type of lid attachment can be realised on all
embodiments illustrated in the present application.
[0067] Furthermore, the third material weakening 122 can have a
stepped shape in the region of the peripheral extension of the tear
strip 114, so that when the remaining third material weakening 122
is in the same position as in the first embodiment, the tear strip
114 has a relatively great axial length. Consequently, the opening
region 124 of the packaging 132 is enlarged in the axial direction
to the disadvantage of the packaging portion 126 which is without a
tear strip and a gap.
[0068] In addition, the second material weakening 118 can be of a
shorter dimension in the axial direction starting from the removal
end 110a of the packaging than the first material weakening 116, so
that it ends with an axial distance a upstream of the third
material weakening 122.
[0069] Consequently, although tearing the tear strip 114 produces
an axial gap in the opening region 124 of the packaging 132 as in
the first embodiment of FIG. 1, the tear strip 114 then remains
connected to the remaining material of the packaging wall of the
opening region 124, so that after the packaging 132 has been used,
there are fewer individual parts to dispose of.
[0070] Furthermore, in an advantageous development of the present
invention, a fourth material weakening 136 can be provided parallel
to the third material weakening 122, which fourth material
weakening 136 preferably extends in the peripheral direction
starting from the longitudinal end, remote from the removal end
110a of the packaging 132, of the second material weakening 118 and
which also extends in the peripheral direction approximately in the
same axial position starting from the first material weakening 116,
but without passing through the tear strip 114. Thus, the tear
strip 114 can have an axial portion 114a which extends mainly in
the axial direction starting from the removal end 110a and a
peripheral portion 114b which adjoins the axial portion in the
region of its longitudinal edge remote from the removal end 110a
and which mainly extends in the peripheral direction.
[0071] The third and fourth material weakenings 122 and 136,
respectively, advantageously run around the packaging axis at least
from the first material weakening as far as the second material
weakening, as in the embodiment of FIG. 1. The third material
weakening 122 preferably runs in a completely closed manner around
the packaging axis.
[0072] FIG. 4 shows a modification of the planar raw material which
produces the second embodiment of FIG. 3.
[0073] As shown in FIG. 4, the fourth material weakening 136 can
also be omitted. Furthermore, it is possible for the third material
weakening 122 to extend only over part of the periphery of the
packaging wall 110.
[0074] It should be added that the third material weakening 22 of
the first embodiment can also extend over only part of the
periphery of the packaging wall 10.
[0075] FIGS. 5 and 6 show a third and fourth embodiment of a wall
of a packaging according to the invention.
[0076] In the third embodiment of FIG. 5 and in the fourth
embodiment of FIG. 6, the same or functionally identical components
as in the first embodiment of FIG. 1 have been provided with the
same reference signs, but increased by 200 and 300,
respectively.
[0077] In the following, the third and fourth embodiments of FIGS.
5 and 6 will only be described insofar as they differ from the
embodiment of FIG. 1; otherwise reference will be made exclusively
to the description of FIG. 1.
[0078] The packaging wall 210 of FIG. 5 substantially corresponds
to the embodiment of FIG. 1, except that the tear strip 214 and,
associated therewith, the first and second material weakenings 216
and 218, respectively, can extend in a meander shape along the
packaging axis V. Consequently, the gap surface area in the opening
region 224 of the packaging, formed from the packaging wall 210,
can be enlarged compared to the first embodiment of FIG. 1.
[0079] According to the fourth embodiment of the packaging wall 310
in FIG. 6, the tear strip 314 can extend in a spiral shape from the
removal end 310a of the packaging or of the packaging wall 310 as
far as the third material weakening 322 which circulates in a
complete and closed manner.
[0080] The third material weakening 222 of the third embodiment
shown in FIG. 5 also runs around the packaging axis V in a complete
and closed manner.
[0081] Furthermore, it is possible to combine the embodiments of
FIGS. 5 and 6 such that a tear strip extends, for example, in a
meander shape along a spiral line from the removal end of the
packaging or of the packaging wall in the axial centre region of
the packaging.
[0082] FIG. 7 shows by way of example a laminate which can form the
packaging walls of the embodiments of FIG. 1 to 6. This laminate 40
comprises, for example, a paper layer 42, onto one side of which a
layer of aluminium 44 can be laminated as a barrier layer. This
aluminium barrier layer 44 keeps gases such as oxygen and water
vapour, away from the inner region of the conical packaging, so
that food located in the inner region of the conical packaging can
be kept for longer than would be the case without a barrier
layer.
[0083] A film of polyethylene terephthalate (PET) 46 can be
laminated onto the side of the aluminium layer 44 directed away
from the paper layer 42.
[0084] A perforation 48 which forms, for example, the first
material weakening 16 is preferably made in the PET layer 46 by
laser machining.
[0085] In this respect, it is advantageous for the material
weakening 16 in the laminate 40 to be provided only in the plastics
material layer, more precisely in the PET layer 46, while the
barrier layer 44 is primarily intact and can thus fulfil its
barrier function.
[0086] In addition or alternatively, the paper layer 42 can also be
provided with a material weakening.
[0087] However, in the case of a combination of paper, aluminium
and PET shown in FIG. 7, due to the stability of PET, it suffices
to provide only the PET layer 46 with perforations 48. The
perforations 48 introduced thus act on the entire laminate in a
tear guiding manner, so that a tear which is made in a suitable
manner in the laminate 40 is guided along the material weakenings
16, 18 and 22, respectively, and it propagates accordingly under
the effect of force.
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