U.S. patent application number 12/528372 was filed with the patent office on 2010-07-15 for pouch for a pressurized bottle.
This patent application is currently assigned to LINDAL FRANCE SAS. Invention is credited to Herve Bodet, Hans-Peter Lilienthal.
Application Number | 20100176153 12/528372 |
Document ID | / |
Family ID | 38520666 |
Filed Date | 2010-07-15 |
United States Patent
Application |
20100176153 |
Kind Code |
A1 |
Bodet; Herve ; et
al. |
July 15, 2010 |
POUCH FOR A PRESSURIZED BOTTLE
Abstract
The invention relates to a pouch for a pressurized bottle, made
up of a tubular wall closed in its upper part by a welded seam into
which a valve is incorporated. According to the invention, the
tubular wall is obtained by overlapping and welding together the
two lateral edges of a strip, and the tubular wall is closed in its
lower part by an essentially round bottom wall. Thus, the tubular
wall of the pouch will have a practically circular cross section in
a large lower part, this cross section tending towards an
elliptical shape as it nears the upper end where it becomes
completely flat. The pouch will, at least in a major lower part,
occupy practically all the space in the bottle, considerably
reducing the dead space in that part.
Inventors: |
Bodet; Herve; (Verdun,
FR) ; Lilienthal; Hans-Peter; (Hamburg, DE) |
Correspondence
Address: |
WESTERMAN, HATTORI, DANIELS & ADRIAN, LLP
1250 CONNECTICUT AVENUE, NW, SUITE 700
WASHINGTON
DC
20036
US
|
Assignee: |
LINDAL FRANCE SAS
Briey Cedex
FR
|
Family ID: |
38520666 |
Appl. No.: |
12/528372 |
Filed: |
February 22, 2008 |
PCT Filed: |
February 22, 2008 |
PCT NO: |
PCT/EP2008/052182 |
371 Date: |
January 27, 2010 |
Current U.S.
Class: |
222/107 ;
222/402.1 |
Current CPC
Class: |
B65D 83/62 20130101 |
Class at
Publication: |
222/107 ;
222/402.1 |
International
Class: |
B65D 35/08 20060101
B65D035/08 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 23, 2007 |
FR |
0701298 |
Claims
1. Pouch for a pressurised bottle composed of flexible tubular wall
closed in its top part by flattening the tubular wall in order to
weld it on itself, an aerosol valve being integrated in the weld,
characterised in that the tubular wall is obtained by overlapping
and welding the two lateral edges of a strip.
2. Pouch according to claim 1, wherein the top part of the lateral
weld is situated at one of the ends of the top weld of the tubular
wall.
3. Pouch according to claim 1, wherein the tubular wall is closed
in its bottom part by welding its bottom edge flat.
4. Pouch according to claim 3, wherein the bottom weld and top weld
are substantially in the same plane.
5. Pouch according to claim 1, wherein the tubular wall is closed
at its bottom part by an essentially round bottom wall.
6. Pouch according to claim 5, wherein the bottom wall is produced
from a flexible material, preferably from the same material as that
used for the tubular wall.
7. Pouch according to claim 5, wherein the bottom wall is
essentially flat and perpendicular to the longitudinal axis of the
pouch.
8. Pouch according to claim 5, wherein the bottom wall is fixed to
the internal face of the tubular wall.
9. Pouch according to claim 1, wherein the bottom wall is fixed to
the tubular wall by a folded-over edge.
10. Pouch according to claim 1, wherein the tubular wall consists
of a metal/plastic film, preferably aluminium associated with
polypropylene, high- or low-density polyethylene, EVOH (ethylene
vinyl alcohol) and/or Orgaloy.RTM. (a mixture of polyamide and
polypropylene).
11. Pouch according to claim 2, wherein the tubular wall is closed
in its bottom part by welding its bottom edge flat.
12. Pouch according to claim 2, wherein the tubular wall is closed
at its bottom part by an essentially round bottom wall.
13. Pouch according to claim 12, wherein the bottom wall is
produced from a flexible material, preferably from the same
material as that used for the tubular wall.
14. Pouch according to claim 6, wherein the bottom wall is
essentially flat and perpendicular to the longitudinal axis of the
pouch.
15. Pouch according to claim 12, wherein the bottom wall is
essentially flat and perpendicular to the longitudinal axis of the
pouch.
16. Pouch according to claim 13, wherein the bottom wall is
essentially flat and perpendicular to the longitudinal axis of the
pouch.
17. Pouch according to claim 6, wherein the bottom wall is fixed to
the internal face of the tubular wall.
17. Pouch according to claim 7, wherein the bottom wall is fixed to
the internal face of the tubular wall.
19. Pouch according to claim 17, wherein the bottom wall is fixed
to the tubular wall by a folded-over edge.
20. Pouch according to claim 18, wherein the bottom wall is fixed
to the tubular wall by a folded-over edge.
Description
[0001] The invention concerns a pouch for a pressurised bottle
according to the precharacterising clause of the main claim.
[0002] Such pouches are commonly used in cosmetic, food and
technical-product atomisers. They separate the product to be
applied from the propellant gas contained in the bottle.
[0003] They generally consist of two walls welded together by four
welds, a valve being integrated in the top weld to enable the
content of the pouch to be taken off.
[0004] Once filled, these pouches therefore have an oval or
elliptical transverse section. The two lateral welds each form a
projecting edge that requires oversizing the bottle in order to
leave space for them. Likewise, the bottom of the pouch is also
flattened and is appreciably distant from the wall of the bottle.
In other words, the dead space inside the bottle due to the
geometry of the pouch is not insignificant.
[0005] From the document FR 2 853 633 A1 a pouch for a
non-pressurised bottle is known, the cylindrical central part of
which is formed by rolling a rectangular laminated film and bonding
the opposite sides together. This pouch is closed at the bottom by
a thick plate to which it is connected by welding. The top part of
the pouch is welded to a circular collar onto which a pumping
device can be snapped. When the product is taken off, a negative
pressure forms in the pouch, which contracts. However, the bottom
plate prevents complete contraction of the pouch because of its
rigidity. In addition, it is not possible, still because of this
thick bottom plate, but also the top collar, to wind the pouch on
itself along its longitudinal axis for example in order to
facilitate its introduction into a bottle having a smaller
insertion neck or to reduce the storage volume before assembly.
[0006] The objective of the invention is therefore firstly to
reduce the number of welds necessary for manufacturing the pouch
and secondly to reduce the dead space inside the bottle in order to
increase the filling ratio while keeping a pouch that is
sufficiently flexible to be able to be wound on itself in order to
facilitate its insertion in a bottle.
[0007] This objective is achieved according to the invention
because the tubular wall is obtained by overlapping and welding the
two lateral edges of a strip. Thus the tubular wall of the pouch
will have an almost circular transverse section over a large part
of its height. Moreover, the projecting edges of the pouches of the
prior art are avoided. In addition, there is now only one
longitudinal weld, where two were necessary with the known pouches
of the prior art.
[0008] It is preferable for the part of the lateral weld to be
situated at one of the ends of the top weld of the tubular
wall.
[0009] In a first embodiment of the invention, the tubular wall is
closed in its bottom part by welding the bottom edge of the wall
flat, preferably in the same plane as the top weld including the
valve. This first embodiment is particularly simple to implement.
The transverse section of the pouch is almost circular halfway up
the height of the pouch, this section tending to become elliptical
when approaching the top and bottom ends, where it is totally flat.
The pouch occupies, at least in its central part, a major part of
the space of the bottle, considerably reducing the dead space in
this part.
[0010] In a second embodiment, the tubular wall is closed in its
bottom part by an essentially round bottom wall. Thus the circular
transverse section extends as far as the bottom part of the pouch,
tending to become elliptical when approaching the top end, where it
is totally flat. The pouch occupies, at least in a major bottom
part, practically all the space of the bottle, considerably
reducing the dead space in this part.
[0011] To enable the pouch to be wound on itself along the
longitudinal axis of the tubular wall, it is preferable to produce
the bottom wall from a flexible material, preferably the same
material as that used for the tubular wall. By choosing the same
material, management of the manufacture is facilitated and problems
of welding incompatibility are avoided. It is thus possible to
reduce the storage volume for the pouches before they are
introduced into the pressurised bottles and to facilitate
introduction thereof into these bottles when the neck of the
bottles is relatively narrow.
[0012] It is preferable in this case for the bottom wall to be
essentially flat and perpendicular to the longitudinal axis of the
pouch. This is the solution that is the most simple to implement.
The bottom wall is preferably fixed to the internal face of the
tubular wall, in particular by means of a folded-over edge.
[0013] In accordance with the invention, it is preferable for the
tubular wall to consist of a metal/plastic film, preferably
aluminium associated with polypropylene, high- or low-density
polyethylene, EVOH (ethylene vinyl alcohol) and/or Orgaloy.RTM. (a
mixture of polyamide and polypropylene).
[0014] The invention is described in more detail below with the
help of the figures, which show:
[0015] FIG. 1: a perspective view of a first example embodiment of
a pouch according to the invention;
[0016] FIG. 2: a front view of the pouch of FIG. 1;
[0017] FIG. 3: a view in section along the line A-A in FIG. 2;
[0018] FIG. 4: a side view of the pouch of FIG. 1;
[0019] FIG. 5: a perspective view of a second example embodiment of
a pouch according to the invention;
[0020] FIG. 6: a front view of the pouch of FIG. 5;
[0021] FIG. 7: a view in section along the line A-A in FIG. 6;
[0022] FIG. 8: a side view of the pouch of FIG. 5;
[0023] FIG. 9: a partial cross section of the bottom of the pouch
of FIG. 5.
[0024] In both embodiments, the pouch (1, 101) of the invention
consists of a tubular wall (2, 102). This tubular wall is obtained
by welding the two lateral edges of a strip, these two edges
overlapping. The longitudinal weld (23, 123) is therefore made by
applying the internal face of one of the edges to the external face
of the other end of the strip. This weld is therefore in line with
the tubular wall without projecting as is the case in the prior
art, where the two edges are welded by putting the internal faces
of the edges of the strip face to face.
[0025] The tubular wall (2, 102) consists of a strip closed on
itself for example by a weld so as to obtain a circular transverse
section without a projecting edge.
[0026] The top end (22, 122) is closed by flattening the tubular
wall in order to weld it on itself. An aerosol valve (4, 104),
known per se, is placed at the centre of this weld (22, 122) to
enable the product contained in the pouch (1, 101) to be taken
off.
[0027] The choice of material will for example be a metal/plastic
film such as aluminium associated with polypropylene, high-or
low-density polyethylene, EVOH (ethylene vinyl alcohol), or
Orgaloy.RTM. (a mixture of polyamide and polypropylene).
[0028] This pouch is intended to be introduced into a dispensing
bottle. The valve serves to take off the content of the pouch. A
gas or other propellant contained in the receptacle, outside the
pouch, serves to propel this content through the valve as soon as
the latter is actuated.
[0029] In the first embodiment of the invention, the tubular wall
(102) is closed at its bottom end (121) by welding the bottom edge
(121) of the wall flat. The top weld (122) and the bottom weld
(121) are preferably in the same plane, although this is not
obligatory. The longitudinal weld (123) is preferably placed at one
of the ends of the bottom (121) and top (122) welds.
[0030] In the second embodiment, the tubular wall (2) is closed at
its bottom end (21) by a substantially round bottom wall (3)
produced from a flexible material, preferably the same material as
that used for the tubular wall.
[0031] The bottom wall (3) is fixed for example by welding to the
bottom end (21) of the pouch (2). This bottom wall (3) is
essentially flat and extends in the plane perpendicular to the
longitudinal axis of the pouch (1). It will be possible for example
to weld it by folding downwards the periphery of the bottom wall
(3) so that a projecting edge (31) forms parallel to the
longitudinal axis of the pouch, as shown by FIG. 9.
[0032] The advantage of this pouch, whether it is a case of the
first embodiment or the second, is to require only three welds
instead of four in the pouches of the prior art. In addition, the
shape of the pouch is essentially cylindrical in a large part of
its height rather than oval or elliptical as in the prior art. In
addition, the absence of the longitudinal welds flat over the
entire height of the pouch makes it possible to effectively reduce
the dead space in the bottle. This affords a better filling ratio.
This is because the tubular wall is to a great extent cylindrical
and therefore is better aligned with the wall of the receptacle in
which it is to be inserted.
LIST OF REFERENCES
[0033] 101 Pouch [0034] 102 Tubular wall [0035] 121 Bottom end
[0036] 122 Top end [0037] 123 Lateral weld [0038] 104 Valve [0039]
1 Pouch [0040] 2 Tubular wall [0041] 21 Bottom end [0042] 22 Top
end [0043] 23 Lateral weld [0044] 3 Bottom wall [0045] 31
Folded-over edge [0046] 4 Valve
* * * * *