Dosing device

Abstract

A dosing device is provided and comprises: a dosing chamber having an inlet through which product can enter from a container; an outlet into which product flows from the chamber and through which product flows out of the device; a siphon member located around the outlet; a vent opening in the chamber; a container-side vent which opens into the container, in which: the siphon member terminates at a level L1 with respect to the outlet; the outlet opens into the chamber at a level L2; such that in use product flows into the chamber through the inlet/s and fills the chamber until L2 is reached and then product is siphoned from the chamber into the outlet by the siphon member, the siphoning continuing until product in the chamber reaches L1, whereupon: air entering the vent opening interrupts the siphoning; and air vents into the container through the container-side vent such that thereafter recharging of the chamber repeats, in which a chicane is provided for preventing leakage of product through the vent opening.

Claims

1. A dosing device comprising: a dosing chamber having an inlet through which product can enter from a container; an outlet into which product flows from the chamber and through which product flows out of the device; a siphon member located around the outlet a vent opening in the chamber a container-side vent which opens into the container, in which: the siphon member terminates at a level L1 with respect to the outlet the outlet opens into the chamber at a level L2 such that in use product flows into the chamber through the inlet/s and fills the chamber until L2 is reached and then product is siphoned from the chamber into the outlet by the siphon member, the siphoning continuing until product in the chamber reaches L1, whereupon: air entering the vent opening interrupts the siphoning; and air vents into the container through the container-side vent such that thereafter recharging of the chamber repeats, in which a chicane is provided for preventing leakage of product through the outlet, said chicane defining an outlet receiving orifice, an exit pathway, a space having a floor and a slanted upper surface communicating said outlet receiving orifice and said exit pathway, said outlet emptying through said outlet receiving orifice into said space, said exit pathway extending above said floor, said exit pathway offset from said outlet such that drips from said outlet accumulate in said space for avoiding dripping; in which the outlet is generally cylindrical with a generally circular section, in that the siphon member extends around the outlet, and in that the siphon member has a section having a generally figure-of-eight outline, or an elliptical section; the outlet is concentrically arranged within the siphon member.

2. A device as claimed in claim 1, in which the chicane includes a reservoir for catching product in advance of the outlet.

3. A device as claimed in claim 1, in which the inlet comprises one or more apertures.

4. A device as claimed in claim 1, in which the vent opening comprises a tube.

5. A device as claimed in claim 3, in which the vent opening tube has one end which opens into the chamber and one end which is exposed to atmospheric pressure.

6. A device as claimed in claim 1, in which the vent opening opens into the chamber at a level L3 which is above L2 in use.

7. A device as claimed in claim 1, in which the container-side vent is a tube.

8. A device as claimed in claim 1, in which air vents into the container from the vent opening and/or from the outlet.

9. A device as claimed in claim 1, in which the outlet is a tube.

10. A dosing device comprising: a dispensing chamber having one or more inlet apertures through which product can enter the device from a container; a cylindrical outlet tube into which product flows from the chamber and through which product flows out of the device; a siphon bell located around the outlet tube, the siphon bell having a section with a generally figure-of-eight outline, or having an elliptical section, wherein the outlet is concentrically arranged within the siphon member; an atmosphere vent tube positioned in the chamber and having one end which opens into the chamber and at the other end is exposed to atmosphere, a container-side vent tube which extends into the container, in which: the siphon bell terminates at a height H1 with respect to the outlet tube the outlet tube opens into the chamber at a height H2 such that in use product flows into the chamber through the inlets and fills the chamber until it reaches H2 and then product is siphoned from the chamber into the outlet tube through a gap between the siphon bell and the outlet tube, the siphoning continuing until product in the chamber reaches height H1, whereupon: air entering the chamber from the atmosphere vent tube interrupts the siphoning air vents into the container through the container-side vent tube and thereafter re-charging of the dosing chamber repeats, in which a chicane is provided for preventing leakage of product through the outlet tube, said chicane defining an outlet tube receiving orifice, an exit pathway, a space having a floor and a slanted upper surface communicating said outlet tube receiving orifice and said exit pathway, said outlet tube emptying through said outlet tube receiving orifice into said space, said exit pathway extending above said floor, said exit pathway offset from said outlet tube such that drips from said outlet tube accumulate in said space for avoiding dripping.

11. A device as claimed in claim 1 in combination with a container.

12. A combination as claimed in claim 11, in which the container is filled with flowable product.

13. A combination as claimed in claim 12, in which the flowable product as a viscosity in the range of 0.001 mP.Math.as to 10 mP.Math.as.

14. A dosing apparatus for dispensing a dose of liquid according to claim 1 comprising: (i) a container having an outlet and a siphon member located around the outlet, wherein: the outlet is generally cylindrical with a generally circular section, in that the siphon member extends around the outlet, and in that the siphon member has a section having a generally figure-of-eight outline, or an elliptical section; the outlet is concentrically arranged within the siphon member; (ii) said dosing device operably connected to said container, (iii) a liquid contained in said container; wherein said liquid is a shear thinning liquid and said shear thinning liquid has a viscosity of greater than 1 Pa.Math.s measured at 100 s1 at 23 C.

15. A device as claimed in claim 1, in which the ratio of the total surface of the inlet to the siphon member surface is between 0.35 and 0.9.

16. A device as claimed in claim 1, in which the inlet surface area is between 40 and 100 mm.sup.2.

17. A device as claimed in claim 10, in which the ratio of the total surface of the inlet to the siphon member surface is between 0.35 and 0.9.

18. A device as claimed in claim 10, in which the inlet surface area is between 40 and 100 mm.sup.2.

19. A device as claimed in claim 14, in which the ratio of the total surface of the inlet to the siphon member surface is between 0.35 and 0.9.

20. A device as claimed in claim 14, in which the inlet surface area is between 40 and 100 mm.sup.2.

21. A dosing device comprising: a dosing chamber having a device inlet through which product can enter from a container; a device outlet into which product flows from the chamber and through which product flows out of the device; a siphon member located around the outlet a vent opening in the chamber a container-side vent which opens into the container, in which: the siphon member terminates at a level L1 with respect to the outlet the outlet opens into the chamber at a level L2 such that in use product flows into the chamber through the inlet/s and fills the chamber until L2 is reached and then product is siphoned from the chamber into the outlet by the siphon member, the siphoning continuing until product in the chamber reaches L1, whereupon: air entering the vent opening interrupts the siphoning; and air vents into the container through the container-side vent such that thereafter recharging of the chamber repeats, in which a chicane is provided by the siphon member for preventing leakage of product through the outlet, the siphon member inlet and the device outlet are offset and the chicane is slanted, and in which the chicane creates a space offset from the outlet in the siphon member in which liquid can accumulate to prevent dripping from the outlet.

22. A device as claimed in claim 21, in which: the outlet is generally cylindrical with a generally circular section, in that the siphon member extends around the outlet, and in that the siphon member has a section having a generally figure-of-eight outline, or an elliptical section.

23. A device as claimed in claim 22, in which the outlet is concentrically arranged within the siphon member.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a perspective view of an embodiment of a drawing of a dosing device of the invention;

(2) FIG. 2 is a cross-sectional view of the dosing device of FIG. 1;

(3) FIG. 3 is a cross-sectional view of the dosing device of FIG. 1;

(4) FIG. 4 is a cross-sectional view of the dosing device of FIG. 1 showing product beginning to be siphoned between an interior of a siphon bell and an exterior of an outlet tube;

(5) FIG. 5 is a cross-sectional view of the dosing device of FIG. 1 show product flowing down the outlet tube and out of the device;

(6) FIG. 6 is a cross-sectional view of the dosing device of FIG. 1 showing product at a level L1 where product flow ceases;

(7) FIG. 7 shows time, pressure and weight data collected from dispensing through dosing devices of the invention;

(8) FIG. 8 shows time, pressure and weight data collected from dispensing through dosing devices of the invention;

(9) FIG. 9 shows time and weight data collected from dispensing through dosing devices of the invention;

(10) FIG. 10 shows time and weight data collected from dispensing through dosing devices of the invention;

(11) FIG. 11 is cross-sectional view of a second embodiment of the dosing device of the invetion;

(12) FIG. 12 is a bottom plan view of the second embodiment of the dosing device of FIG. 11;

(13) FIG. 13 is a cross-sectional view of an embodiment of a dosing device of the invention having an elliptical and/or 8 shaped siphon bell;

(14) FIG. 14 is a bottom plan view of the dosing device of FIG. 13;

(15) FIG. 15 shows shear rate and viscosity data for experiments with liquids of different viscosities;

(16) FIG. 16 details equipment used in experiments using devices of the invention;

(17) FIG. 17 is a graph showing rheological behavior of products;

(18) FIG. 18 is a graph showing a Baileys flow curve;

(19) FIG. 19 is a results table showing viscosity measurements.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(20) FIGS. 1 and 2 show a dosing device generally indicated 10.

(21) The device comprises a body with: a main chamber 15: an outlet tube 20; a vent pipe 25; a siphon bell 30 and a container-side vent 35.

(22) The chamber 15 has product inlets 40. In this embodiment four to fourteen inlets are provided.

(23) The body has a top plate 45 from which the vent 35 extends.

(24) The outlet tube 20 is generally cylindrical and generally central (but does not have to be) and is in fluid communication with the vent 35, although the tube itself terminates at a level L2 before the vent 35 i.e. they are not continuous.

(25) The siphon bell 30 has a generally elliptical section and extends from the top plate down and around the tube 20 (which creates a gap around the outlet tube). Note that it does not extend all the way to the bottom of the tube 20 and terminates at a level L1.

(26) The inventors have surprisingly found that due to this elliptical or 8 shaped section it is possible to pour the product at various angles. Hence, it is not necessary to hold the container, i.e. the dosing device at a specific angle. Hence, this 8-shaped section ensures that enough product will flow into the product chamber while maximum speed even at an low angle thus permitting an ergonomic handling for the consumer.

(27) The vent pipe 25 extends from the exterior of the device through the chamber and terminates at a level L3 (which is higher than L2).

(28) In use the device is attached to a container (not shown) filled with flowable product. If the container is upturned product starts to fill the chamber 15 through the inlets 40 (FIG. 3).

(29) Product continues to fill the chamber 15 until level L2 is reached (FIG. 4) at which point product begins to be siphoned between the interior of the siphon bell 30 and the exterior of the outlet tube 20, flowing between the top of the tube 20 and the top plate 45 (not out of the vent 35), down the outlet tube 20 and out of the device (FIG. 5).

(30) Product flows out of the chamber 15 until level L1 is reached (FIG. 6). At this point the siphoning is interrupted by the air in the vent pipe 25 and the dose from the device is complete. Air can now vent into the container through the outlet tube 20 and then the vent 35. Recharging of the device then begins and the process can repeat.

(31) Below is described a series of experiments conducted with various input parameters for different parts of the device based on the general structure described above.

(32) Value of A=Air chamber

(33) A1 Diameter (doesn't vary, 6.2 mm)

(34) A2 Height=59 mm now (>C2)

(35) Value of B=Central Pipe

(36) B1 Diameters: 4.3 mm or 6.2 mm

(37) B2 Height: between 0 mm and 130 mm

(38) Value of C=Dispensing Chamber

(39) C1 Diameter: 10 mm (doesn't vary)

(40) C2 Height: 42 mm (doesn't vary)

(41) Value of D=Holes

(42) D Number of holes: up to 7 holes

(43) G Tilted performance: upside down (UD) or 45 Vo 2 bottles (Lenor): 1 L & 0.75 L

(44) TABLE-US-00001 TABLE 1 Bottle B1 pipe Upside B2 Volume diameter Down or D number length (ml) (mm) 45 of holes (mm) 750 6.2 UD 4 130 750 6.2 UD 7 50 750 6.2 UD 7 130 750 6.2 45 7 50 750 6.2 45 7 130 1000 6.2 UD 4 50 1000 6.2 UD 7 50 1000 6.2 UD 7 130 1000 6.2 45 4 50 1000 6.2 45 7 50 1000 6.2 45 7 130

(45) A1, A2, C1, C2 fixed.

(46) FIGS. 7 to 10 show data collected from dispensing through devices formed in accordance with the present invention. The pour to dose dispensing principle is illustrated. All tests have been performed at 23 C. and viscosity measurements referred to herein are taken with a standard Rheometer 301 (Anton Paar) in order to determine Viscosity =f, shear rate); and shear stress =f (, shear rate) as indicated in FIG. 16.

(47) FIGS. 11 and 12 show a dosing device 110 formed according to a preferred embodiment. As indicated in FIG. 11, the orientation of the 7 or 14 product inlet holes are depicted having either an overall surface of 49 mm2 or 99 mm2, respectively.

(48) FIGS. 12 and 14 shows a cross-sectional view of the dosing device with the elliptical and/or 8 shaped siphon bell which in this embodiment comprises of a siphon pipe surface of 120 mm2. It has been found that the ratio of the total surface of the product inlet openings (40) and the siphon pipe surface may also affect the dosing, in particular if the total surface of the inlets is smaller than the siphon pipe surface. Preferably, the ratio of the total surface of said inlet openings (40) and said siphon pipe surface (30) may be from 0.35 to 0.9, preferably 0.4 to 0.8+/0.03. Preferably the product inlet holes surface is in the range of 40 to 100 mm2, preferably 49 to 99 mm2. Hence, as shown in FIGS. 7 to 11 and 12, seven and/or 14 inlet holes ensure correct dosing.

(49) FIGS. 13 and 14 show a dosing device 210 formed according to a preferred embodiment. FIG. 13 illustrates the chicane 250 which can be additionally present in order to avoid any leakage. If a highly viscous product is dosed with the present dosing device such a chicane is of great advantage, since after dosing a small amount of the sticky highly viscous liquid can remain at the outlet pipe surface and can result in a final unwanted drop. Hence, this remaining liquid can accumulate in the space 255 created by the chicane. Thereby, dripping can be avoided.

(50) FIG. 15 shows the results of certain experiments using dosing devices of the type shown in FIGS. 11 to 14 in combination with liquids of different viscosities.

(51) The viscosity and rheology profile of the liquid may impact the accuracy, speed of dosage, and comfort in the squeeze operation. It has been found that liquids having a shear thinning-type rheology profile and viscosity within the below-mentioned ranges can be surprisingly well dosed at various angles and provide a drip-free dose. In a preferred embodiment the liquids herein have a viscosity of from 1.1 Pa.Math.s to 3.70 Pa.Math.s measured at 100 s.sup.1 at 23 C. It has further surprisingly been found that the above viscosities will deliver a constant dose of liquid.

(52) FIGS. 16 to 19 details further experiments undertaken using dosing devices formed in accordance with the present invention.

(53) FIG. 20 depicts extrapolated and measured values of tested various different laundry agents with the dosing device. The inventors surprisingly revealed that the dosing device of the present invention is capable of dosing different highly viscous product by having a viscosity limit to 0.1 Pa.Math.s at 100 s1.

(54) TABLE-US-00002 TABLE 2 This table shows further results using a device formed in accordance with the present invention. Ariel Product Water France Ariel UK Lenor at shear rate of P&G value (Pa .Math. s) 0.001 3.707 1.836 1 s1 Agro Paristech value (Pa .Math. s) 0.001 0.92 0.46 0.22 Extrapolated, not reliable values Prototype V16 viscosity limit 0.93 < < 0.62 at shear rate of P&G value (Pa .Math. s) 0.001 0.31 0.21 100 s1 Agro Paristech value (Pa .Math. s) 0.001 0.28 0.2 0.035 Measured, reliable values Prototype V16 viscosity limit 0.071 < < 0.048

(55) Although illustrative embodiments of the invention have been disclosed in detail herein, with reference to the accompanying drawings, it is understood that the invention is not limited to the precise embodiments shown and that various changes and modifications can be effected therein by one skilled in the art without departing from the scope of the invention as defined by the appended claims and their equivalents.