Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
330951BA.OOI
21 S9~8~
A BAG OR POUCH FOR CONTAINING A FLUID
The present invention relates to a bag or pouch made from a
pair oi flat walls formed by flexible sheet material and
sealingly interconnected so as to define between the opposite
walls a storage chamber for containing a fluid and at least
one fluid discharge passage communicating with the storage
chamber at a junction position and arranged outside the
storage chamber, which means that the opposite wall parts
defining the fluid discharge passage do not extend in-between
the opposite wall parts defining the storage chamber. The bag
or pouch is such that the opposite wall part defining the
discharge passage are moved into mutual sealing contact at at
least one sealing position when fluid has been filled into
the storage chamber. This means that when the bag or pouch
has been distended by gaseous or liquid fluid filled into the
storage chamber, the stresses generated in the opposite walls
of the bag or pouch cause the fluid discharge passage to
seal.
DE-A-26 47 399, DE-A-40 07 128, and DE-B-12 07 856 disclose
bags or pouches of a type similar to that described above. In
these known bags, however, the opposite flexible wall parts
defining the discharge passage therebetween are located
between the opposite wall parts defining the storage chamber
so that the pressure of a fluid contained within the storage
chamber tends to press the opposite wall parts or the dis-
charge passage into mutual sealing engagement. When a gaseous
or liquid product contained in these bag-like containers is
to be discharged a thin tube or a similar elongated object
has to be inserted through the discharge passage in order to
open the same.
Norwegian patent No. 96,943 and US patent No. 3,149,772
disclose a bag or pouch of the above type defining a storage
chamber and a discharge passage arranged outside the storage
chamber.
~IENDED SHEET
330951BA.OOI
2159583
EP-A-0 226 290 discloses a similar dispenser pouch having a
storage chamber or reservoir with a lower tapered-down neck
commllnlcating with a fluid discharge passage. The neck is
adapted to retain a pre-measured charge of the liquid con-
tained in the pouch.
The present invention relates to a bag or pouch of the above
type having an improved self-sealing effect so that the
discharge passage may be reliably sealed even when the dis-
charge passage is relatively broad and also when the product
contained in the storage chamber is a gas, a gas mixture, or
a low viscosity liquid having a small surface tension. The
bag or pouch according to the invention is self-sealing even
when it is only partly filled with fluid.
According to a first aspect the bag or pouch according to the
present invention is characterized in that at least at one
side of the fluid discharge passage and adjacent to the
junction position the storage chamber is defined by a sealing
line which together with the longitudinal axis of the dis-
charge passage defines an angle which is smaller than 90 so
that adjacent to the discharge passage the storage chamber
extends beyond the junction position in a direction towards
an outlet end of the discharge passage.
When a bag or pouch of the type described above is distended
by an inner fluid pressure the opposite wall parts adjacent
to the junction position defines (in a cross-sectional view)
an outer angle (~ in Fig. 31) with a line extending at right
angles to the central plane of the bag in its flat, empty,
collapsed condition. It has been found that the self-sealing
effect of the discharge passage of the bag or pouch is
increased when the said angle is reduced. It has also been
found that the angle ~ is reduced and that the self-sealing
effect of the bag or pouch is consequently increased when the
storage chamber extends beyond the junction position in a
direction towards an outlet of the discharge passage at least
- ~!ENDED SHEET
330951BA.OOI
20., 2159583
at one side and preferably at both sides of the fluid dis-
charge passage.
According to a second aspect the bag or pouch according to
the present invention is characterized in that ~t least one
restriction is defined in the discharge passage, for example
at or closely adjacent to the sealing position. It has been
found that also such restriction causing a substantial local
reduction of the width of the discharge passage may increase
the self-sealing effect of the bag or pouch. The restriction
may have an unessential or a very small extension in the
axial direction of the discharge passage, or it may extend
~AENDED SHEET
3 2159583
along ~ substantial part of ~h~ l~ng~th ~ hQ zlischarge
passage. The discharge passage may be defined between a ~air
of spaced substantially parallei or non-parallel opposite
heat sealed seams or other sheet interconnecting seams, and
the res~rictian may be defined by a projection extending
trans~ersely from one of the seams or by such projections
extending against each other from the opposite seams.
The part of the storage chamber being adjacent to the dis-
charge pa~sage s y be funnel-shaped which means that this
part of the storage chamber i8 defined by a pair of sealing
lines con~erging in the direction of the junction position.
Alternatively, the part of the scorage chPmher being adjacent
to the junction point-may be defined by sealing lines extend-
ing substantially at right angles to the axis of the dis-
charge passage as disclosed in the abo~e Norwegian patent No.96,943. Howe~er, the storage chamber may at least at one side
and preferably at both sides of the fluid discharge passage
and adjacent to the junction position be defined by a sealing
line defining with the longitll~in~l axis of the discharge
passage an angle which is smaller than 90.
As mentioned abo~e, the storage chamhPr sy adjacent to the
junction position be defined by sealing lines con~erging
towards the junction position so as to define a funnel-like
shape opening into the discharge passage. In such case, the
said restriction is preferably positioned substantially at
the intersection of the extensions of the con~erging sealing
lines.
- The storage chamh~r s y comprise a main ~hamher and an outlet
chamber or metering cha~h_r which are interconnected by a
connecting passage, and the discharge passage s y then com-
municate with the outlet chamh_r or metering chamber at a
position substantially opposite to the connecting passage.
When such a bag or pouch is arranged such that the discharge
passage is directed do~L..:-rdly, a liquid fluid contained in
the bag or pouch will flow from the main chamh~r into the
~- O 9~/'', 3 I PC~
2159583
- met_ring chamber or outlet chambe~ through the c3nnectLn~
passage so as to refill the metering chamber wAen a ~
?roduct has been dispensed from the mecering chamber by
m~n~ 1 operation of the discharge passage or by means of a
suitable dispenser, e.g. as that disclosed in applicants' co-
pending Danish patent application No. 0244/94.
The storage chamber defined in the bag or pouchiaccording tO
the in~ention may comprise twO or more aligned chamber sec-
tions, and adjacent chamber sections may be interconnected by
a comm~nication passage. The bag or pouch may then ha~e a
segmented, hose-like shape. This ~mhoA; m~nt is especially
advantageous when the bag or pouch is used to contain air or
another gas. Such an air-filled bag may, e.g., be used as a
shock-absorber when packing fragile objects. Also other
embsA;m~nes of the bag according to the in~ention may be used
for such purpose.
The bag or pouch according to the in~ention may be used for
cont~ining any kinds of gaseous or liquid products, such as
air, gaseous and liauid disinfectants, alcohol and other
liauid solvents, soaps, shampoos, creams, and other liquid
cosmetics, drinks, ketchup, mustard and other liauid food-
stuffs. It is possible to discharge a product cont~ln~ in
the bag or pouch according to the in~ention by manipulating
the discharge passage and the adjacent part of the storage
-h~mner. This may be done m~ntl~tly or by means of a special
dispenser as mentioned abo~e. In any case it is desirable to
ha~e the bag or pouch filled with the product arranged such
that the fluid discharge passage depends freely. Therefore,
the bag or pouch preferably comprises means for susp n~ing
the bag or pouch such that the fluid discharge passage and at
least the adjacent part of the storage chamber may depend
freely from the suspension means. Such suspension means may,
e.g., comprise a pair of through openings defined in the
opposite walls at opposite sides of the connecting passage.
The bag or pouch may then be suspended from a pair of sup-
porting pins or hooks extending through the openings, and the
~ o 9~ i, pc~
2159583
~u~ dLstance be~ween s~ch suppo~ting ?ins may be s~
- than the distance be~ween ~he through openings of ~he pouch
whereby i~ may be ensured that liouid fluid may flow f-eely
from ehe main chamber into ~he me~er ng chamber ~ia the
connecting passage.
In addition to the fluid discharge passage the bag or pouch
may comprise at least one further self-sealing passage exten-
ding between the storage chamber and the ambient atmosphere
and being defined between the opposite walls of the pouch.
One fluid may then be introduced into the storage chamber ~ia
said further self-sealing passage whiIe another fluid is
discharged through the discharge passage. As an example, a
surgical instrument may be contained in the storage chamber
and air may be eYacuated from the storage chamber while a
gaseous disinfectant, which may be le~s poisonous than
ethylene oxide, is introduced into the storage ~h~mhPr via
the other self-sealing passage. A bag or pouch having only
one discharge passage may also be used for packing surgical
instruments under aseptic conditions.
Similarly, when the bag or pouch is used for cont~;n;ng an
infusion liquid the discharge passage may be connected to a
c~nn~lla inserted into the patient, and metered amounts of a
medicament may at the same time currently be fed into the
storage chamber ~ia said further self-sealing passage.
-
The opposite walls of the bag or pouch may be made fromidentical sheet material, such as a plastic film being of the
same thickness. The opposite walls may, howe~er, also be made
from different sheet s terials and/or be of different
thicknesses. As an example, the opposite walls may be made
from polyethylene films ha~ing a thickness of 50-250~ or
other plastic films ha~ing a similar stiffness. One of or
both of the opposite walls may be formed by a plastic film
consisting of two or more layers of different plastic
materials which have been co-extruded or laminated.
~ o 9 1,__, 3 1 ~- ' 3~3- ''J ' ` `
2159583
- Acc~rding to the ln~entio~ the bag or pouch ~ay c~mprise G
restriction defined in ~he discharge passage at a position
having a distance ~rom the outlet end of the discharge pas-
sage being less than half the axial length of-the discharge
passage. This restriction may be the only restriction of the
discharge passage or may be in addition to a restriction
formed in the inlet end portion of the discharge passage at
the sealing position. The restriction formed in the outlet
end portion of the discharge passage tends to counteract
undesired dripping of liquid product from the free outer end
portion of the discharge passage when a product discharge
operation has been tPrmi n~ ted.
Usually, it is desired that the width of the discharge pas-
sage should be almost as large as possible in order to faci-
litate product discharge from the bag or pouch. However, atthe same time a reliable self-sealing effect of the discharge
passage should be ensured. The largest possible width of the
discharge passage is dependent on various parameters, such as
surface tension, adhesion characteristics, and viscosity
characteristics of the fluid, the material from which the
opposite flexible walls of the pouch are made, the stiffness
and surface characteristics of such walls, and the shape or
contour of the discharge passage and of the adjacent part of
the storage chamDer, etc. The width of the discharge passage
may ~ary along the length of the passage. ~owever, in most
cases the mi n; mllm width of the discharge passage, such as the
width of the passage at a restriction, is between 2 and 100
mm, preferably between 3 and 30 mm dependent i.a. on the
above parameters.
In order to ensure good self-sealing of the discharge passage
the axial length thereof is preferably at least 1~ times the
~min;mllm width of the discharge passage and more preferably
about two times such minimllm width. In order to efficiently
prevent any leakage from a bag or pouch filled with a fluid
product, the discharge passage may have a closed outlet end
adapted to be cut by the user of the product so as to open
~ O 9 ~ _ 3 1 ~
- ~ 2159583
the tlsch~r~e passage. As descrLbed in more det~il beLo~ ~a~s
or pouches according to the presen~ invention ~ay have StO-
rage chamDers and discharge passages defi~ed therein with a
great number of symmetrical or non-symmetricai shapes. In the
preferred embodiment, however, ;he bag or pouch and the
contours of the storage chamber and the discharge passage are
substantially symmetrical about the longitudinal axis of the
discharge passage.
As explained abo~e, the digcharge passage may be shaped in
many different ways with ~arious kinds of restrictions and
with a width ~arying substantially along the length of the
passage. Preferably, howe~er, the fluid discharge passage
defines a substantially rectilinear flow path extending from
the junction position to the outlet opening of the discharge
passage. This means that it is possible to insert a product-
filling or a product discharge tube inta the discharge pas-
sage so that such tube extends from the outlet opening of the
passage through the axial length of the discharge passage and
into the storage chamber, whereby it is possible to fill
and~or empty the bag or pouch ~ia such tube.
The invention will now be further described with reference to
the drawings, wherein
Fig. 1 is a plan ~iew of a first ~mho~m~nt of ehe pouch or
bag according to the in~ention shown in its empty and flat
condition,
Figs. 2-28 show the discharge passage and the adjacent part
of the storage chamber of a Yariety of different embodiments
of the bag or pouch according to the in~ention,
Figs. 29 and 30 are plan ~iews showing two further embodi-
ments of the bag or pouch according to the in~ention in whichthe storage chambers are di~ided into interconnected chamber
sections, and
Fig. 31 is a diagrammatic sectional ~iew showing a bag or
pouch in a filied, distended condition.
wos1l2273l PCT~K94/OOUi
8 2159583
- The drawings illustrate bags or pouches each made from a pair
of oppositely arranged flexible side walls, such as plastic
films, which may be monoextrudates, coextrudates, and/or
laminates. The opposite flexible side walls of the bag or
pouch may be formed by the opposite side walls of a collapsed
hose or tube section, which is heat sealed or otherwise
sealingly interconnected at its opposite ends (Fig. 1).
Alternatively, the bag or pouch may be made from a pair of
separate, superposed flexible films or sheets, which have
been heat sealed or otherwise sealingly interconnected along
the contour of the pouch, Figs. 2-30. In the drawings such
heat sealed or otherwise sealingly interconnected areas ha~e
been cross-hatched.
The pouch shown in Fig. 1 has an upper marginal heat sealed
area 10 having formed therein an upper suspension opening 11
positioned on a central symmetry axis 12 of the pouch. A pair
of lower oppositely arranged heat sealed areas 13 are shaped
so as to di~ide the inner space of the pouch into an upper
main chamDe ~ nd a lower, smaller metering chamber or outlet
chamber lS. The chambers 14 and lS are interconnected by an
interconnecting passage 16, and the outlet chamber lS com-
municates with a downwardly directed discharge passage or
spout 17. A pair of lower suspension openings 18 are formed
in the lower heat sealed areas 13 and are positioned immedi-
ately above the outlet chamber lS on either side of thesymmetry axis 13. The discharge passage 17 has a restriction
24 close to the outlet end thereof. This restriction is
formed by a pair of opposirely directed extensions 19 of the
heat sealed areas 13. When a gaseous or liquid fluid has been
filled into the main ch~her 14 and the outlet chamber lS of
the bag or pouch shown in Fig. 1 so that the opposite flex-
ible walls are distended by the inner fluid pressure, the
discharge passage 17 is effectively sealed due to the shape
of the discharge passage 17 and the adjacent part of the
outlet chamber lS as explained in more detail below.
AMENDED SHEET
9 2159583
- ~he ba~ Qr po~ shown in ~ LS cda~d ~ be use~ ~ a
~ dispenser of the type disclosed in applican~s~ co-pendin~
Danish patent application ~o. 0244/94. The oppositely
directed extensions l9 in the lower part of the discharge
S passage L7 tend to prevent undesired dripping of product frc~
the discharge passage, when an amount of liquid product has
been discnarged from the pouch via the discharge passage or
spout 17.
Figs. 2-28 diagra =atically illustrate a variety of possible
alternative shapes of the discharge passage or spout 17 and
of an adjacent storage chamber part 20 which may be a chamber
corresponding to the outlet chamber 15 in Fig. 1 cnmm~lnica-
ting with a main chamber 14, or may be a single storage
chamber.
lS Fig. 2 illustrates a bag or pouch ha~ing a straight discharge
passage 17 defined between a pair of subst~ntially parallel
sealing lines. The discharge passage 17 c~mm~nicates with the
storage chamber 20 at a junction position 21. As shown in
- Fig. 2, the storage ch~mh~r 20 extends beyond that junction
position 21 in the direction of the outlet end 22 of the
discharge passage. Thu8, adjacent to the discharge passage 17
the storage chamber 20 is defined by a pair of sealing lines
23 each defining together with the axis 12 an angle ~ which
is an acute angle, whereby the self-sealing effect of the
discharge passage i8 substantially impro~ed.
The embo~iments shown in Fig. 3-6 substantially correspond to
the embo~iment shown in Fig. 2 with the exception that in
Figs. 3-6 the discharge passage 17 has been pro~ided with
restrictions 24. Thus, in Fig. 3 the discharge passage 17 has
a restriction defined by oppositely directed extensions 19 of
the heat sealed areas. In the embo~iment shown in Fig. 4 the
discharge passage 17 has three restrictions, each of which is
defined by one extension 1~, only. Fig. 5 shows an embo~imsnt
in which the discharge passage 17 has a single restriction
extending along a substantial axial length of the passage 17
- 0 9~:'''31 2 1 5 9 5 8 PCT D~
a; ~he junction posi.ion 21, and in Fis. 6 a restric io~ 24
is fonmsd at ;he junction position as well as adjacent tO the
outlet end 22 of the discharge passage 17.
In the embodiments shown in Figs. 7-12 the discharge passage
s 17 is at least partly defined by converging and/or diverging
opposite sealing lines so that the width of the discharge
passage varies continuously at least along part of the axial
length of the discharge passage. The discharge passage 17 of
the PmhO~;mPnt shown in Fig. 7 has restrictions 24 defined at
the junction position 21 and adjacent to the outlet end 22 of
the passage 17. In the ~mho~;m~nt shown in Fig. 8 restric-
tions 24 are defined by means of extensions 19 at the junc-
tion position 21 and adjacent to the outlet end 22 of the
passage 17. Furthermore, a restriction 24 is defined at the
middle of the discharge passage 17.
In the ~mho~impnt of Fig. 9 two restrictions 24 are formed in
the discharge passage 17 by means of extensions 19 of the
heat sealed area. In the Pmho~im~nt shown in Fig. 10 only one
restriction 24 i8 defined at the middle of the discharge
passage 17, and in Figs. 11 and 12 restrictions 24 are
defined at the junction position 21 and at the outlet end 22
of the discharge passage 17, respectively. In Fig. 12 the
discharge passage 17 is partly defined by opposite, curved
sealing lines, and in Fig. 13 the discharge passage 17 is
stepped so that two restrictions 24 are formed by the second
and third step, respectively.
The ~mho~i m-~t shown in Fig. 14 defines a discharge passage
17 having a restriction 24 defined at the junction position
21 by a pair of opposite extensions 19 of the sealing area,
and these extensions also define bottom sealing lines of the
storage chamber 20. A restriction 24 is also defined at the
outlet end 22 of the discharge passage 17.
Fig. 15 illustrates an ~mho~;mPnt in which the part of the
storage chamber 20 adjacent to the junction position 21 is
WO941~731 PCT~K94/oo~s
1 215958~
- defined by converging sealing lines, and a restriction 24 is
- defined by extensions 19 in the discharge passage 17 at a
position adjacent to the intersection point of the extensions
of such sealing lines.
In the embodiment shown in Fig. 16 the discharge passage 17
is shaped like a chamber having a square outline. The chamber
or passage inlet and outlet define restrictions 24. The
embodiment shown in Fig. 17 is similar to that shown in Fig.
2 with the exception that in Fig. 17 the storage chamber 20
is defined by opposite side seams converging in the direction
of the discharge passage 17.
Figs. 18-21 show embodiments in which the inner end of the
discharge passage 17 is ~6efined by heat sealing lines~cros-
sing a heat sealing line~defining the storage chamber 20,
1~ where~y ~torage chamber pockets 27 are defined on both sides
of the inlet end of the discharge passage 17. In Figs. 18 and
19 the discharge passage 17 has substantially the same width
along the length thereof while the discharge passage 17 is
funnel shaped in the embo~;mPnt shown in Fig. 20. In Fig. 21
the storage chamber 20 is funnel-shaped.
The e.~bodiment shown in Fig. 22 is similar to that shown in
Fig. 15. However, the extensions 19 are differently shaped
and positioned.
The e.~bodiment shown in Fig. 23 is similar to the embodiments
shown in Figs. 18-20. Howe~er, in Fig. 23 the discharge
passage 17 is positioned completely inside the sealing line
26 defining the adjacent part of the storage chamber 20. In
the embodiment shown in Fig. 24 the discharge passage 17 also
extends inwardly beyond the storage chamber sealing line 26,
and the inner end of the discharge passage is defined by
relatively large heat sealed areas 28 which may be relatively
stiff. Such relatively stiff areas at the inlet end of the
discharge passage 17 may further improve the self-sealing
effect of the discharge passage.
AhlENDED SHEET
- ~0 9~ 1 PCT~' 001``
l~ - 2159583
- The embodimen~ sAown in Figs. 25 and 26 are similar to the
embodimen~s shown in Figs. 15 and 22, the difference being
that in Figs. 25 and 26 the opposite sealing lines of the
storage chamber 20 are curved and that the restriction 24 is
positioned adjacent to the outlet end 22 of the discharge
passage 17.
.
Fig. 27 shows an embodimene in which the outlet passage is
funnel-shaped, and a restriction 24 is defined at the outlet
end 22 of the discharge passage. This restriction is formed
by opposite heat sealed areas 29 at the outlet end of the
passage. The embo~m~nt shown in Fig. 28 corresponds to those
shown in Figs. 15, 21, and 22 with the exception that in Fig.
28 the restriction 24 is defined at the outlet end 22 of the
discharge passage 17.
Figs. 29 and 30 show embo~;m~nts in which the storage chamber
has been di~ided into ch~mh~r sections 30 by pairs of oppo-
site, transversely extending heat sealed areas 31 forming
connecting passages 32 therebetween. When a pressure is
applied to the outer walls of a ~h~mh~r segment 30 fluid
cont~ine~ therein may escape into adjacent ~h~mh~r segments
~ia the connecting passages. Such fluid flow between the
chamber segments 30 may be'restricted more or less by proper-
ly choosing the,width of the connecting passages 32. Fluid
flow between adjacent chamber segments 30 may be further
restricted by shaping the heat sealed areas 31 as shown in
Fig. 30. The connecting passages 32 may be considered a fluid
discharge passage where the angle ~ (~ide Figs. 2 and 3)
defined between the border lines of the adjacent chamber
segment 30 and the longitt~in~l axis of the pouch is acute,
as will be described in more detail below.
Fig. 31 diagrammatically shows a central section taken at
right angles to the opposite walls of a bag or pouch of the
- type described abo~e. Fig. 31 shows the discharge passage o-
spout 17 and the adjacent parc of the bag or pouch when
3S distended by an inner f luid pressure so that oucer shoulders
~-0 91,'~'-31 ?~
~ 13 2I59583
33 are fonnea adjacent to ~he d~sc~.arse passaa~ or spo~t
These shoulders define an ansle B toge~her with a li~e 2
extending at right angles to the ceneral symmet~y axis 12 o~
the bag or pouch. As mentioned abo~e, it has been found tha~
~he angle ~ indicates whether the pouch or bag has good self-
sealing characteristics or not. Thus, the self-sealing effec:
is increased when the angle ~ is ~;mi nt shed.
EXAMPLE 1
A test was made to ~Pmonctrate the interrelationship between
the self-sealing effect of the discharge passage 17 and the
angle a (shown in Figs. 2 and 3~ and the angle ~ (shown in
Fig. 31~. A bag of the type shown in Fig. 1 was used where
the outlet passage 17 and the adjacent part of the outlet
chamber 15 had a shape substantially as shown in Fig. 3. The
opposite walls of the bag or pouch were made from a laminate
of two outer layers, each being a 45~ polyethylene film and
an inner core layer of a 12~ polyester film. The width w of
the main chamber 15 was 40 mm, the width d of the discharge
passage 17 was 10 mm, and the axial length 1 of the discharge
pa sage was 20 mm. Tests were made for different ~alues of
the angle a ranging from 10 to 180, and the corresponding
values of the angle ~ were measured in a plane extending
through the axis 12 and at right angles to the pouch walls
(at right angles to the plane of the drawing in Fig. 1). When
measuring the ~alue of the angle ~ the bag or pouch was
filled with pure tap water, and the inner water pressure was
gradually increased to a ~alue at which the fluid discharge
passage 17 was just about to open, and the ~alue of the angle
~ was measured at that inner pressure.
The following results were obtained:
,B
1~0 ~0
170 7S
160 75 not self-sealing
150 65
140 60
130 65
- -0 9~1'',31 PCT ~ '0
~_ ~4
2159583
120 40
110 35 accidentially
100 25 self-sealing
~0 20 ~ery good self-
sealing characte-
ristics
extremely good self-
lS 20 30 sealing characteris-
tics
The above test results show that the self-sealing characte-
ristics of a pouch as that shown in Fig. 1 may be substan-
tially improved by reducing the angle a.
\
EXAMPLE 2
Bags or pouches of the type shown in Fig. 1 in which the
walls were made from a flexible foil or film of polyethylene
having a thickness of so-ao~ and from a coextrudate of poly-
ethyle, ethylene vinyl alcohol and polyethylene with a totalthickness of 50-80~, respectively, was made. The angle ~ was
60-80, the width d of the discharge passage 17 was 3-5 mm,
and the length 1 of the discharge passage was 10-12 mm. The
bag showed good self-sealing characteristics with contents of
water, soap water, alcohol and air.
EXAMPLE 3
A bag or pouch of the type shown in Fig. 1 was made from a
laminate of 90~ polyethylene and 12~ polyester. The angle ~
was 70 and the width d of the discharge passage 17 was ~ mm
and the length 1 of the discharge passage was 16 mm. The bag
was used for cont~ining liquid soap and shampoo and showed
very good self-sealing characteristics. In order to prevent
undesired dripping of the product subsequent to a discharge
~091i~ .31 ~CT~
L5 2159583
?rocess, extensLons L9 of the type shown in Fig. L wer-- .
positioned about 5 mm from the outle~ end 22 o. the dischar~e
passage.
It should be underseood that ~arious alterations, combina-
tions and changes may be made within the scope of the present
in~ention. An imDortant feature is, however, that a storage
chamber pocket is defined at least at one side of the inlet
end portion of the fluid discharge passage and/or that at
least one restriction is defined in the fluid discharge
passage.
