CN1040860C

CN1040860C - A bag or pouch for containing a fluid

Info

Publication number: CN1040860C
Application number: CN94191621A
Authority: CN
Inventors: 杰根·海尔盖德; 拉斯·H·弗赖德拉德
Original assignee: Plum Kemi Produktion AS
Current assignee: Plum Kemi Produktion AS
Priority date: 1993-03-29
Filing date: 1994-03-29
Publication date: 1998-11-25
Anticipated expiration: 2014-03-29
Also published as: KR960700939A; PL173009B1; FI954606A0; NO953799L; FI954606A; AU6424594A; WO1994022731A1; AU677837B2; CA2159583A1; ES2093530T3; EP0690811B1; NO953799D0; DE69400805D1; BR9406561A; DK0690811T3; ATE144478T1; PL310942A1; SG54981A1; DE69400805T2; NZ263522A

Abstract

A bag made from a pair of flat walls formed by flexible sheet material, such as plastic films. The walls are sealingly interconnected so as to define between the opposite walls a storage chamber (20) for containing a fluid. A fluid discharge passage (17) communicates with the storage chamber (20) at a junction position (21) and is arranged outside the storage chamber, and the bag is such that the opposite wall parts 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. In order to improve the self-sealing effect of the bag, the storage chamber (20) extends beyond the junction position (21) in a direction towards an outlet end (22) of the discharge passage (17). This means that the angle alpha is an acute angle. Alternatively or additionally, at least one restriction may be defined in the discharge passage (17), preferably at or closely adjacent to the sealing position.

Description

The bag of contain fluids

The present invention relates to a kind of bag of contain fluids, it is the planomural that is formed by a pair of flexible sheet, interconnect hermetically and make, between relative wall, form the storage chamber of a contain fluids and at least one is on the junction, be arranged in the fluid take-off channel that is communicated with storage chamber in the storage chamber outside, in other words, the relative wall portion that forms the fluid take-off channel does not extend between the relative wall portion that limits storage chamber.This bag, when fluid injected supply chamber, the relative wall portion that limits take-off channel moved into mutual sealing contact state at least one sealing station.In other words, when injecting the gas of storage chamber or liquid and having made bag bulging, the stress that produces in the relative wall of bag makes the sealing of fluid drain passageway.

DE-A-26 47 399, DE-A-4007 128 and DE-B-12 07856 disclose and the similar a kind of bag of above-mentioned bag, but, the relative flexible wall portion that limits take-off channel betwixt is positioned between the relative wall portion that limits storage chamber, therefore, the pressure of the fluid that holds in the storage chamber tends to the relative wall portion of take-off channel is pressed into the state of mutual sealed engagement.When gaseous state in being contained in this bag class container or liquid form product are prepared to release, a tubule or similar microscler object must be inserted take-off channel, so that take-off channel is opened.

No. the 96th, 943, Norwegian Patent and US Patent disclose the bag of the above-mentioned type for the 3rd, 149, No. 772, and it defines a storage chamber and a take-off channel that is arranged in the storage chamber outside.

EP-A-0 226 290 discloses a kind of similar distribution pouch, and it has a storage chamber or storehouse, has a lower taper neck that is communicated with the fluid take-off channel.This neck is suitable for keeping here the liquid in the bag of being contained in of scheduled volume.

The bag that the purpose of this invention is to provide a kind of contain fluids, it has the sealing effectiveness of improvement, even when the take-off channel broad, the product that holds in the storage chamber is a gas, gas mixture or when having little capillary low-viscosity (mobile) liquid, take-off channel also can seal reliably.Bag of the present invention even when partly injecting fluid, also be self-packing.

According to the bag that the invention provides a kind of contain fluids, it is made by a pair of planomural, described planomural is formed by flexible sheet, be tightly connected mutually, so that between relative wall, form a storage chamber that is used for contain fluids, and fluid take-off channel, described fluid take-off channel is communicated with and is arranged in the outside of described storage chamber in engage position and described storage chamber, when fluid has injected the storage chamber of described bag, at least at a sealing station, the relative wall portion that forms take-off channel is moved into mutual sealing contact state, at least one side in the fluid take-off channel, and be adjacent to engage position, storage chamber is to form a potted line less than 90 ° angle by a longitudinal axis with take-off channel to limit, and therefore, is adjacent to take-off channel, storage chamber surmounts described engage position and extends on the direction of the exit end of discharge passage.

When the bag of the above-mentioned type during by the internal fluid pressure bulging, a relative wall portion that is adjacent to engage position and a angle (β is in Figure 31) perpendicular to straight line (in the cross sectional drawing) formation of the central plane of the bag of flat, empty, folding state.Have been found that when above-mentioned angle reduces the self sealss effect of the take-off channel of bag increases.Also find, when at least one side of storage chamber in the fluid take-off channel, both sides preferably, when surmounting above-mentioned engage position extend on the direction of take-off channel outlet, the β angle reduces, thereby the self sealss effect of bag is increased.

The part of the contiguous take-off channel of storage chamber can be infundibulate, and in other words, this part of storage chamber can be formed by a pair of potted line that draws on the engage position direction.Perhaps, the contiguous sector of breakdown that engages of storage chamber can be formed by the basic rectangular potted line of axis with take-off channel, and is disclosed such as No. the 96th, 943, Norwegian Patent.But storage chamber at least one side of fluid take-off channel, is preferably in its both sides, and in contiguous joint place, can form a potted line less than 90 ° angle with the take-off channel longitudinal axis by one and limit.

As mentioned above, be adjacent to joint place, storage chamber can be limited by the potted line that draws in towards engage position, thereby forms a funnel-shaped opening that feeds take-off channel.In this case, described restriction preferably is positioned at the intersection of extended line of the potted line of gathering substantially.

Storage chamber can comprise a main chamber and a downstream chamber or masuring room, and both are connected with each other by a connection channel, and take-off channel is connected with downstream chamber or masuring room in the position relative substantially with interface channel.When the manual manipulation take-off channel or by suitable distributing box (as disclosed the sort of distributing box in No. the 0244/94th, the Danish Patent Application of the applicant's common not authorization), when from masuring room, sending liquid form product, the take-off channel of this bag is placed down, the liquid that holds in the bag will flow into masuring room or downstream chamber from the main chamber by interface channel, so that fill with masuring room once more.

The storage chamber that limits in the bag of the present invention can have the chamber portion of two or more alignings, and adjacent chamber portion can be coupled together by passage.Bag can have a segmentation, the shape of hose-like.Present embodiment advantageous particularly when bag is used to hold air or other gas.Bumper when this bag that holds air for example can be used as the packing breakables.Also can be used for this purpose according to other embodiments of the invention.

According to the of the present invention bag of gas and the liquid product that can be used to hold any kind of, as air, gaseous state or liquid sterilant, alcohol or other liquid flux, washer solvent, shampoo, cream, liquid make-up, beverage, tomato ketchup, mustard and other liquid food.Neighbouring part by handling take-off channel and storage chamber can drainage be contained in the product in the bag of the present invention.This can manually or by distributing box above-mentioned finish.Under any circumstance, be marked with product the bag high-volume the time, preferably make fluid take-off channel freedom sagging.Therefore, bag preferably has the device that is used for suspended bag, makes the fluid take-off channel and the neighbouring part of storage chamber is sagging from the suspension gear freedom at least.For example, this suspension gear can comprise a pair of through hole that forms on the relative wall of the relative both sides of interface channel.Bag can be suspended on and passes on this a pair of rest pin to through hole, can be in the distance between the rest pin less than the distance between the through hole on the bag, thus can guarantee that liquid can freely flow into masuring room from the main chamber by interface channel.

Except the fluid take-off channel, bag can also have at least one other self sealss passage, and this passage extends between storage chamber and ambient atmosphere, limits between the relative wall of bag.A kind of fluid can be introduced storage chamber by described other self sealss passage, and one other fluid then can be emitted by take-off channel.As an example, surgical instruments can be placed in the storage chamber, with air emptying from storage chamber, and introduces the gaseous decontaminant littler than epoxyethane toxicity by another self sealss passage to storage chamber.Have only the bag of a take-off channel can be used under aseptic condition, packing surgical instruments.

When bag was used for holding infusion liquid, take-off channel can be connected on the intubate of inserting in the patient body, and simultaneously, a certain amount of medicament can be by in the described other self sealss passage input storage chamber.

The two relative walls of bag can be made with the plastic film of identical sheet material such as same thickness.But relative wall also can be made by the sheet material of different sheet materials and/or different-thickness.As an example, relative wall can be made by the thick polyethylene foil of 50-250 μ or other plastic sheeting with similar stiffness.The plastic film that a wall in the relative wall or two walls can be made of the plastics two-layer or that multilayer is different that co-extruded or lamination are made forms.

According to the present invention, bag can comprise a restriction that forms in take-off channel, and its position makes its distance of leaving take-off channel outlet less than half of take-off channel length.This restriction can be unique restriction of take-off channel, perhaps can be on sealing station, the replenishing of the restriction that forms at the entrance point of take-off channel.The restriction that this forms at the take-off channel exit end when product is emitted the manipulation end, tends to stop liquid product to drip from the N/R of take-off channel outer end.

Usually, the width of take-off channel preferably should be big as much as possible, so that product releases from bag.But the while should guarantee the failure-free self sealss effect of take-off channel.The big as far as possible width of take-off channel depends on various parameters, surface tension as fluid, the material of the relative flexible wall of attachment characteristic, viscosity characteristics, making bag, the stiffness and the character of surface of wall, and the shape or the profile of take-off channel and storage chamber neighbouring part.The length of passage, the width of take-off channel can change.But in most of the cases, depend on above-mentioned parameter.The minimum width of take-off channel, for example at the width of restriction place take-off channel, 2 and 100mm between, be preferably in 3 and 30mm between.

For the self sealss that guarantee that take-off channel is good, its axial length should be at least 1.5 times of take-off channel minimum width, is preferably about 2 times of minimum width.For the leakage of the bag that prevents to be equipped with fluid product effectively, take-off channel can have an osed top exit end, and it is suitable for by the user of product cutting so that open take-off channel.Will tell about in detail below, according to bag of the present invention, wherein storage chamber of Xing Chenging and take-off channel can have a large amount of symmetry or non-symmetrical shape.But in preferred embodiment, bag and storage chamber and take-off channel are basic symmetries about the longitudinal axis of take-off channel.

As mentioned above, take-off channel can be shaped by many different modes, has various restrictions, and along passage length, width can change.But the fluid take-off channel is preferably formed as a straight line stream that extends to the take-off channel outlet from engage position.In other words, can be to the straight line stream of discharge passage outlet.In other words, can in take-off channel, insert a product filling tube or product offlet, make pipe insert the axial length of take-off channel, enter storage chamber, thereby can inject or the emptying bag by this root pipe from channel outlet.

Contrast the following drawings describes the present invention in detail now:

Fig. 1 is that bag is in the state of empty peace among the figure according to the planar view of the bag of first embodiment of the invention.

Fig. 2-28 expression is according to the neighbouring part of the take-off channel and the storage chamber of different embodiments of the invention.

Figure 29 and 30 is that wherein storage chamber is divided into two parts that are interconnected according to the planar view of the bag of two embodiment in addition of the present invention.

Figure 31 be in fill with, the bulging state the bag partial section.

Bag shown in the figure all is that the flexible side walls by a pair of positioned opposite constitutes, and this plastic sheeting can single extruding, co-extruded and/or lamination are made.The relative flexible side walls of bag can be formed by the flexible pipe of a folding or the opposing sidewalls of pipeline section, and the two ends of flexible pipe are fused or other sealing means is joined together (Fig. 1).Perhaps, bag also can be separated by a pair of, and the flexible thin film who stacks makes, and is joined together (Fig. 2-30) along the profile welding of bag or with other sealing means.In the drawings, the bonding land of this welding or other sealing means is represented by mesh lines.

There is a suppending hole 11 in the welding zone 10 that bag shown in Figure 1 has top edge on the center of symmetry axis 12 of this zone bag.The welding zone 13 of the positioned opposite that a pair of bottom is shaped is divided into the main chamber 14 on top and bottom, less masuring room or downstream chamber 15 with the inside of bag.Chamber 14 and 15 is interconnected by an interface channel 16, and downstream chamber 15 is communicated with a downward exit passageway or take-off channel 27.A pair of bottom suppending hole 18 13 forms in bottom welding zone, and the both sides of diad 13 near downstream chamber 15 above.Take-off channel 17 has a restriction 24 near its exit end.This restriction is that a pair of extension 19 that extends in opposite directions by welding zone 13 forms.When gas or liquid have injected main chamber shown in Figure 1 14 and downstream chamber 15, make relative flexible wall circle internal pressure and during bulging, because the shape of the neighbouring part of take-off channel 17 and downstream chamber 15 seals take-off channel 17 effectively, this will describe in detail hereinafter.

Bag shown in Figure 1 is suitable for being applied in the applicant's No. the 0244/94th, the Danish Patent Application of common not authorization in the disclosed the sort of distributing box.In opposite directions the extension 19 in the take-off channel bottom is when the certain amount of fluid product during drainage, tends to prevent that liquid product from dripping from the N/R of take-off channel by take-off channel 17 from bag.

The many possible alternative form of Fig. 2-28 expression take-off channel 17 and adjacent storage chamber 20 parts, storage chamber part can be chambers that is equivalent to the downstream chamber 15 that is communicated with main chamber 14 among Fig. 1, perhaps can be independent storage chamber.

Fig. 2 represents a bag with straight take-off channel 17, and take-off channel 17 is to limit between a pair of substantially parallel potted line.Discharge passage logical 17 is connected with storage chamber 20 at engage position 21.As shown in Figure 2, storage chamber 20 surmounts engage position 21 extensions on the direction of the exit end 22 of take-off channel.Therefore, be adjacent to take-off channel 17, storage chamber 20 is limited by a pair of potted line 23, and every sealing lines 23 forms a sharp angle with axis 12, thereby has significantly improved the self sealss effect of take-off channel.

Fig. 3-6 illustrated embodiment is substantially similar in appearance to embodiment illustrated in fig. 2, and difference is that in Fig. 3-6, take-off channel 17 is provided with restriction 24.In Fig. 3, the restriction that take-off channel 17 has is that the extension in opposite directions 19 by the welding zone limits.In the embodiment shown in fig. 4, take-off channel 17 has three restrictions, and each restriction is only limited by an extension 19.In the embodiment shown in fig. 5, take-off channel 17 have only one at engage position 21 substantially along the restriction of the longitudinal extension of passage 17, and in Fig. 6, a restriction 24 is respectively arranged at engage position and at contiguous take-off channel exit end 22.

In each embodiment shown in Fig. 7-12, take-off channel 17 to small part is to be limited by the relative potted line that draws in and/or disperse, and therefore, the width of take-off channel is a continually varying along the part of take-off channel axial length at least.Take-off channel 17 embodiment illustrated in fig. 7 has the restriction 24 in exit end 22 formation of engage position 21 and adjacent channel 17.In the embodiment shown in fig. 8, restriction 24 is to limit by the extension 19 at the exit end 22 of engage position 21 and adjacent channel 17 respectively.Also define a restriction 24 in the centre of take-off channel 17 in addition.

In the embodiment shown in fig. 9, the extension 19 by the welding zone forms two restrictions 24 in take-off channel 17.In the embodiment shown in fig. 10, only form a restriction 24, and in Figure 11 and 12, restriction 24 limits at the exit end 22 of engage position 21 and discharge passage 17 respectively in the centre of take-off channel 17.In Figure 12, take-off channel 17 partly is to be limited by relative crooked potted line, and in Figure 13, take-off channel 17 is stepped, thus two restrictions 24 respectively by second and the third stage form.

Take-off channel 17 at the embodiment of Figure 14 has a restriction 24 on engage position 21, and this restriction 24 is that the extension in opposite directions 19 by a pair of seal area limits, and these extensions also define the bottom potted line of storage chamber 20.Exit end 22 in take-off channel 17 also defines a restriction 24.

The part of storage chamber 20 contiguous engage positions 21 is to be limited by the potted line that draws in the embodiment shown in fig. 15, and a restriction 24 is limited by extension 19 in take-off channel 17 near the intersection point of above-mentioned potted line extended line.

In the embodiment shown in Figure 16, the shape of take-off channel 17 resembles a chamber with square contour.The entrance and exit of this chamber or passage forms restriction 24.Embodiment shown in Figure 17 is similar to embodiment illustrated in fig. 2, and difference is, in Figure 17, storage chamber 20 is that the relative latasuture that draws on the direction by take-off channel 17 limits.

Among each embodiment shown in Figure 18-21, the inner of take-off channel 17 is limited by the weld bond 25 of crossing the weld bond 26 that limits storage chamber 20, thereby forms supply chamber 27 in the entrance point both sides of take-off channel 17.In Figure 18 and 19, take-off channel 17 has essentially identical width on its length, and take-off channel 17 is funnel-form in embodiment illustrated in fig. 20.In Figure 21, storage chamber 20 is funnel-form.

Embodiment shown in Figure 22 is similar to embodiment illustrated in fig. 15, and still, the shape and the position of extension 19 are different.

Figure 18-20 illustrated embodiment that is similar to embodiment illustrated in fig. 23, but in Figure 23, take-off channel 17 is positioned at the inboard of the weld bond 26 that limits storage chamber 20 adjacent parts fully.In embodiment illustrated in fig. 24, the weld bond 26 that take-off channel 17 also surmounts supply chamber extends internally, and the inner of take-off channel is by harder, and bigger welding zone 28 limits.This arrival end in take-off channel 17 can further improve the self sealss effect of take-off channel than the territory, hard area.

Figure 25 and 26 illustrated embodiments are similar to Figure 15 and 22 illustrated embodiments, and difference is that in Figure 25 and 26, the weld bond of storage chamber 20 is crooked, and the position of restriction 24 is near the exit end 22 of take-off channel 17.

In embodiment illustrated in fig. 27, take-off channel is an infundibulate, at exit end 22 formation one air restrictor 24 of take-off channel.This restriction is to be formed by the exit end of welding zone 29 at passage.Embodiment illustrated in fig. 28 similar in appearance to Figure 15,21 and 22 illustrated embodiments, difference is, in Figure 28, restriction 24 is that the exit end 22 in take-off channel 17 forms.

In the embodiment shown in Figure 29 and 30, storage chamber is divided into some chamber portions 30 by double-type welding zone 31 of laterally extending relatively, forms interface channel 32 between double-type welding zone 31.When pressure acts on the outer wall of a chamber portion 30, the fluid of interior dress can enter in the adjacent chamber portion by interface channel, and flowing of this fluid between chamber portion 30 can be limited by the width of suitably selecting interface channel 32.The fluid that formation welding zone 31 as shown in figure 30 can further be limited between the adjacent chamber part 30 flows.As the angle α (consulting Fig. 2 and 3) between the longitudinal axis of the boundary line of adjacent chamber part 30 and bag during for acute angle, interface channel 32 can be regarded as is a fluid take-off channel, and this will describe in detail hereinafter.

Figure 31 schematically represents the central sectional view perpendicular to the relative wall intercepting of the bag of the above-mentioned type.Figure 31 represent when bag makes contiguous take-off channel form outer shoulder 33 because of the internal pressure bulging drainage way 17 and bag neighbouring part.

The angle β that above-mentioned shoulder and line 24 perpendicular to the central axis of symmetry 12 of bag form.As mentioned above, have been found that whether angle β indication bag has good self sealss characteristic.The self sealss effect increases when angle β reduces.Example 1

For the self sealss effect that shows take-off channel 17 and the interrelation between angle α (shown in Fig. 2 and 3) and the angle β (shown in Figure 31).Once conducted an experiment.Employed is the sort of bag shown in Figure 1, and wherein the adjacent part of take-off channel 17 and downstream chamber 15 has shape substantially as shown in Figure 3.The relative wall of bag is made by two skins and an inner sandwich layer, and each skin is the polyethylene foil of 45 μ, and inner sandwich layer is the mylar of 12 μ.The width w of main chamber 15 is 40mm, and the width d of take-off channel 17 is 10mm, and the axial length l of take-off channel is 20mm.Different value for the angle α of 10 ° of-180 ° of scopes is tested, by axis 12 and with the plane of the rectangular plane of the wall of bag (meeting at right angles) with the drawing of Fig. 1 in measured angular β.When the value of measured angular β, be marked with clean tap water in the bag, inside water pressure is increased to the value that fluid take-off channel 17 is about to open, the value of measured angular β under this internal pressure gradually.

Obtained result is as follows:

α β

180 80

170 75

160 75 no self sealss

150 65

140 60

130 65

120 40

110 35 self sealss by accident

100 25

90 20

80 20

70 15 self sealss characteristics are fine

60 10

50 5

40 20

30 20 self sealss characteristics are better

20 30

10 45

Above-mentioned test results shows that the self sealss characteristic of bag shown in Figure 1 can be improved significantly by reducing angle α.Example 2

Make the sort of bag shown in Figure 1, its mesospore is to be that the polyethylene flexible thin film of 50-80 μ and polyethylene, poly ethylene vinyl alcohol (ethylene vinyl alcohot) and polyethylene laminated film that gross thickness is 50-80 μ are made by thickness respectively.Angle α is 60 °-80 °, and the width of take-off channel 17 is 3-5mm, and the length l of take-off channel is 10-12mm.When holding water, soap water, alcohol and air in the bag, show good self sealss characteristic.Example 3

Lamination with the polyester of the polyethylene of 90 μ and 12 μ is made the sort of bag shown in Figure 1.Angle α is 70 °, and the width d of take-off channel 17 is 8mm, and the length l of take-off channel is 16mm.Bag is used for holding liquid soap and shampoo, shows good self sealss characteristic.In order to prevent that after the drainage process, the N/R of product drips, the sort of extension 19 shown in Figure 1 leaves exit end 22 about 5mm of discharge passage.

Obviously can carry out various changes, comprehensive and change and do not exceed scope of the present invention.But an important feature is, and is that the bag chamber of storage chamber forms in a side of fluid take-off channel entrance point part at least and/or form at least one restriction in the fluid take-off channel.

Claims

1. bag that holds gas, it is made by a pair of planomural, and described planomural is formed by flexible sheet, is tightly connected mutually, so that form a storage chamber (14,15 that is used for contain fluids between relative wall; 20), and fluid take-off channel, described fluid take-off channel is communicated with and is arranged in the outside of described storage chamber in engage position (21) and described storage chamber, when fluid had injected the storage chamber of described bag, at least at a sealing station, the relative wall portion that forms take-off channel was moved into mutual sealing contact state, it is characterized in that: at least one side of fluid take-off channel (17), and be adjacent to engage position (21), storage chamber (14,15; 20) be to form a potted line (23,25) by a longitudinal axis (12) to limit, therefore, be adjacent to take-off channel (17), storage chamber (14,15 less than 90 ° angle (α) with take-off channel (17); 20), surmount described engage position (21) and extend on the direction of the exit end (22) of discharge passage.

2. bag as claimed in claim 1 is characterized in that: form a restriction at least in described take-off channel.

3. bag as claimed in claim 2, it is characterized in that: described restriction (24) forms in described take-off channel at sealing station or near sealing station.

4. bag as claimed in claim 1, it is characterized in that: each side in fluid take-off channel (17) forms described angle (α).

5. bag as claimed in claim 2, it is characterized in that: the part that is adjacent to described engage position of described storage chamber (20) is to limit by close the potted line that draws in the position towards described woman's persona, and described restriction (24) is positioned at the intersection point place of extended line of the potted line of described gathering substantially.

6. bag as claimed in claim 1, it is characterized in that: described storage chamber comprises the downstream chamber or the masuring room (15) of a main chamber (14), two Room are interconnected by a connection channel (16), and described take-off channel (17) is connected with described downstream chamber (15) on basic relative with interface channel (a 16) position.

7. bag as claimed in claim 1, it is characterized in that: described storage chamber (20) comprises the chamber portion (30) of two or more alignings, and adjacent chamber portion is connected with each other by a passage (32).

8. bag as claimed in claim 6 is characterized in that: also comprise the device (13,18) of suspended bag, make described fluid take-off channel (17) and storage chamber (14,15; 20) adjacent at least part can freely be dangled from suspension gear.

9. bag as claimed in claim 8, it is characterized in that: described suspension gear comprises a pair of in described interface channel (16) both sides, the through hole (18) on relative wall (13).

10. bag as claimed in claim 1 is characterized in that: form another self sealss passage that extends between storage chamber and ambient atmosphere at least between the relative wall of bag.

11. bag as claimed in claim 1 is characterized in that: relative wall be make by different sheet materials and/or be different-thickness.

12. bag as claimed in claim 1, it is characterized in that: relative wall is the polyethylene foil with 50-250 μ thickness, or has other plastic sheeting of similar stiffness.

13. bag as claimed in claim 1, it is characterized in that: also comprise a restriction (24) that in take-off channel (17), limits, the distance of exit end (22) of take-off channel (17) is left less than half of the axial length of take-off channel in its position, preferably leaves the exit end 0-10mm of take-off channel.

14. bag as claimed in claim 1 is characterized in that: the minimum width of described take-off channel (17) 2 and 100mm between, be preferably in 3 and 30mm between.

15. bag as claimed in claim 1, it is characterized in that: the axial length of described take-off channel (17) is 1.5 times of take-off channel minimum width at least.

16. bag as claimed in claim 1, it is characterized in that: described take-off channel (17) has an osed top exit end, and it is suitable for being cut so that open take-off channel.

17. bag as claimed in claim 1 is characterized in that: gas-filling or low-viscosity (mobile) liquid.

18. bag as claimed in claim 1 is characterized in that: described bag is basic symmetrical about the longitudinal axis (12) of take-off channel.

19. each described bag among the claim 1-18 is characterized in that: described fluid take-off channel forms a rectangular substantially stream that extends to the outlet of take-off channel (17) from described engage position.