CN1258258A

CN1258258A - Liquid-foaming insert

Info

Publication number: CN1258258A
Application number: CN 98804038
Authority: CN
Inventors: 卡尔·蒙德斯齐恩
Original assignee: Lawson Mardon Packaging Ltd
Current assignee: Amcor UK Group Management Ltd
Priority date: 1997-02-27
Filing date: 1998-02-24
Publication date: 2000-06-28
Also published as: JP2000512958A; AU6302298A; GB9704132D0; WO1998038111A1; EP1007441A1; GB2322614A

Abstract

The insert has a chamber (50) for containing gas inside a pressurised liquid container (60), such that when the container (60) is opened the gas escapes from the insert to cause foaming of the liquid (61). The insert has a gas inlet passage (16) for communication with a headspace (62) and an outlet passage (37) in communication with the liquid. The passages are provided in the adjacent formations (15, 38). The inlet passage (16) communicates with the outlet passage (37) and the chamber (50) via a thin gap (42) between the formations. In use, gas from the container (60) enters the chamber (50) through the inlet passage (16) and the gap (33, 42) in preference to higher viscosity liquid entering the outlet passage (37). On release of the pressure in the container (60), gas is jetted through the outlet passage (37) into the liquid (61) in preference to passing out of the inlet passage (16), due to the design of the passages to provide greater resistance in the inlet passage (16). The insert has no valves.

Description

Make liquid produce the device for posting of foam

The present invention relates to the device foam device for posting of the gas in a kind of liquid container that holds pressurization, like this, when container one is opened, gas just from the device for posting eruption to produce liquid foam.This device for posting is particularly useful for containing the beverage, particularly beer by molten gas, produces the wine foam on the beer thus.

The device for posting that is used for this purpose is disclosed in WO 95/22049; WO 95/04689; WO94/16966; Among GB-A-2283792 and the GB-A2280887.

GB-A2280887 discloses a kind of device for posting, and it floats on the liquid of pressurizing vessel, and an eruption hole of closing that is immersed in the liquid is arranged, and one in the headspace closes above liquid fills eyelet.These eyelets by unidirectional valve closing.

When external pressure surpassed internal pressure, the valve that fills eyelet was promptly opened, and like this, just can enter device for posting from pressurizing vessel from the gas of headspace, and when device for posting and headspace reached balance, valve had just been closed.

When internal pressure surpassed external pressure, eruption eyelet valve was just opened, and like this, during filling, this valve keeps closing.When container is opened, pressure release, therefore this valve is opened, and gas is ejected in the liquid goes.

Device for posting comprises two molded plastics shells, and they are bonded together in the snap-fastener mode, and each shell all has a medium pore, and each hole is equipped with an elastomeric duckbill-type valve, inserts in the hole and limits corresponding eyelet.

Except needs provide and install the duckbilled valve, this device for posting is made easily.This has just improved cost widely, but also will emit certain risk, break away from as valve, or can't normal running.

The present invention has overcome this problem owing to need not that valve is set.

According to the present invention, a kind of device for posting is provided, have one and limit a body that is used to hold the chamber of gas, and can be used in the liquid container of a pressurization, thereby when container is opened, gas flows out from device for posting so that liquid produces foam, device for posting comprises that one allows gas to enter the path, gas access of device for posting from the head room of container, and one allow gas to spray into the gas vent path of liquid in containers from device for posting, ingress path and outlet pathway are formed on the corresponding wall construction, one gap is formed between the described wall construction, and formation chamber and ingress path, connection between the outlet pathway, thereby in use, thereby the gas that viscosity is lower enters the gap and has precedence over the higher liquid of viscosity that enters outlet pathway via ingress path from head room and enters described chamber, and wherein ingress path than outlet pathway to gas pass through to form bigger resistance, thereby when the pressure in the release container, gas preferentially ejects via outlet pathway.

The device for posting preferred design must float on the liquid in the container, but also projection can be set, and it engages container side with the device for posting fix in position.

Now,, device for posting according to the present invention is done further detailed description with reference to accompanying drawing, wherein:

Fig. 1 illustrates the cross sectional view of a device for posting that has assembled of the present invention; And

Fig. 2 illustrates the cross sectional view of the container of a device for posting that liquid and Fig. 1 be housed.

Referring to Fig. 1, device for posting comprises a upper mould product 10 and a bottom moulded parts 30, and each moulded parts all is similar to hemispherical, though they can be microscler.Each

loose pattern product

10,30, available plastics such as polypropylene injection-molded.The circumferential edges of upper mould product 10 has the periphery flange 13 of a moulding, this flange is pressed and is loaded in the respective perimeter groove 33 that forms on lower die product 30 edges, formed a ball-shaped housing basically thus, it has a flat top 40 and a flat bottom 41.Certainly, other method of attachment also can be used, as the gluing method and the heat bonding method of moulded parts 10,30.In case connect together,

moulded parts

10,30 has just formed a chamber 50 that holds gas.Upper mould product 10 has a columniform basically base pipe 14, stretches into chamber 50 vertically from the top 40 of moulded parts 10.

Pipe 14 slightly is coniform, and its tube wall compiles towards the inside of housing.Pipeline 14 ends at the end 15 of an end wall 15a.End wall has a plane 12, and it is in the outside of pipe 14.End wall has axial, an elongated ingress path 16 to run through wherein.

Lower die product 30 41 has an outer recess 31 in the bottom, the end of this recess by one stretch into recess 31 and by end wall 38 close one roughly annular wall 36 limited, just formed a cup-like structure 34 thus in the inside of chamber 50.This cup-like structure 34 meets and holds the end 15 of the pipe 14 of upper mould product 10.The end face 12 of the close pipe in the position of the bottom surface 15 of cup-like structure 34, but be spaced from.Diapire 38 has an outlet pathway 37 to extend wherein, and axially axially aligns with the ingress path 16 of managing among the 14 end wall 15a.Outlet pathway 37 is shorter than ingress path 16 substantially.

Tiny space 42 is limited between the peripheral inside of the peripheral outer of tube end 15 and cup-like structure 34.This space is communicated with chamber 50 and

ingress path

16,37.

Tube end 15 has a more obvious gradient of other parts than pipe, and the inner peripheral surface of ring wall 36 also presents coniform accordingly, thereby space 42 is focused at two 43 places, space between the path 16,37.The sidewall 44 in space 43 also is configured as cone shape and converges in outlet pathway 37 places.

In one embodiment, ingress path 16 is 3 millimeters with the diameter of outlet pathway 37.The degree of depth of close clearance 42 approximately is 0.5 millimeter.The length of ingress path 16 is the twice of outlet pathway 37 at least, and the length of outlet pathway preferably is being less than between 1 millimeter.

Go into,

outlet pathway

16,37 can be form differently in addition, to provide bigger resistance to the gas by ingress path 16.

Device for posting designs to such an extent that can float on the liquid, and since its shape simultaneously also because lower die product 30 overweights upper mould product 10 from dynamic correction.

It is contemplated that ingress path and

outlet pathway

16,37 not necessarily are arranged on the axis of device for posting, but can be offset to axis.

In use, can before container being sealed and pressurize, device for posting be inserted in the liquid container, as beer can.This leak free container 60 as shown in Figure 2, device for posting 100 floats on the liquid 61.Ingress path 16 leads to head room 62 by pipeline 14, and outlet pathway 37 leads to and be immersed in the liquid 61.

Because lower pressure in the chamber 50, gas enters into device for posting by pipeline 14 and ingress path 16 from head room 62.Gas in the ingress path 16 resists with the liquid of contiguous outlet pathway 37, and mainly, gas enters into chamber 50 by space 42, till the pressure of chamber 50 and internal tank reaches equilibrium.Because viscosity is lower, the resistance that liquid is entered is bigger, and gas preferentially enters chamber than liquid.

Open when leading to atmosphere when container 60, pressure is released, so the gas ratio container inside in the chamber 50 has higher pressure.Therefore gas is by space 42, and thus, it goes into liquid via outlet pathway 37 is injected.Ingress path 16 forms higher resistance with respect to the bigger length of outlet pathway 37 to gas passage, so gas preferentially comes out from outlet pathway 37 is injected.The generation of gas that sprays nucleation (nucleation), so dissolved bubble discharges,, just produced the wine foam on the beer if this liquid is beer from liquid.

The strength of spraying is because the sidewall in the space 43 between the aggregation infrastructure in space 42 and two

paths

16,37 and strengthening, and this structure has produced a kind of Venturi effect (venturi efffect).

Device for posting has two parts, and they can connect together simply, so, assemble very simple.In addition, this device for posting does not have to break away from or valve that can't proper operation.

Claims

1. device for posting, have one and limit a body that is used to hold the chamber of gas, and can be used in the liquid container of a pressurization, thereby when container is opened, gas flows out from device for posting so that liquid produces foam, device for posting comprises that one allows gas to enter the path, gas access of device for posting from the head room of container, and one allow gas to spray into the gas vent path of liquid in containers from device for posting, ingress path and outlet pathway are formed on the corresponding wall construction, one gap is formed between the described wall construction, and formation chamber and ingress path, connection between the outlet pathway, thereby in use, thereby the gas that viscosity is lower enters the gap and has precedence over the higher liquid of viscosity that enters outlet pathway via ingress path from head room and enters described chamber, and wherein ingress path passes through to form bigger resistance than outlet pathway to gas, thereby during the pressure in discharging container, gas preferentially ejects via outlet pathway.

2. device for posting as claimed in claim 1, wherein, ingress path is longer than outlet pathway so that described bigger resistance to be provided.

3. device for posting as claimed in claim 2, wherein, the length of ingress path is the twice of outlet pathway at least.

4. as claim 2 or 3 described device for posting, wherein, the length of outlet pathway is less than 1 millimeter.

5. as each described device for posting in the above-mentioned claim, wherein, the degree of depth in described gap is 0.5 millimeter.

6. as each described device for posting in the above-mentioned claim, wherein, the diameter of outlet pathway is 0.3 millimeter.

7. as each described device for posting in the above-mentioned claim, wherein, body comprises that one extends into described chamber and has a pipe that is used to limit the end of the wall construction that has described ingress path, this Guan Youyi end wall that is formed with described ingress path.

8. device for posting as claimed in claim 7, wherein, the body of device for posting has a qualification to have the cup-like portion of the wall construction of described outlet pathway, and the end of described pipe is placed among the cup-like portion, and described gap is limited between the corresponding inside and outside perisporium of cup-like portion and described end.

9. device for posting as claimed in claim 8, wherein, described inside and outside perisporium has the part that converges towards outlet pathway.

10. as each described device for posting in the above-mentioned claim, wherein, ingress path and outlet pathway axially align mutually.

11. as each described device for posting in the above-mentioned claim, wherein, body comprises that two are bound up to form the moulded parts of described chamber with the snap-fastener form.

12. as each described device for posting in the above-mentioned claim, wherein, device for posting is floatable and homeostatic, thus in use ingress path is communicated with head room in the container, and the fluid connection in outlet pathway and the container.

13. a fluid under pressure container has a headspace and accommodates each described device for posting in the aforesaid right requirement, device for posting is arranged to that described ingress path is communicated in headspace and described outlet pathway is communicated in described liquid.