Detergent pack

• US 6,557,732 B2
• Filed: 07/16/2001
• Issued: 05/06/2003
• Est. Priority Date: 07/19/2000
• Status: Expired due to Fees

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Lynde, Kenton Ray, Van Rompuy, Tanya Cecile Corneel, Song, Brian Xiaoqing, Varley, Helen, DeNome, Frank William, Alam, Elizabeth Ann
• Primary Examiner(s): Jacyna, J. Casimer
• Application Number:
  US09/906,479
• Publication Number:
  US 20020084285A1
• Time in Patent Office: 659 Days
• Field of Search: 222/134-137, 222/1, 222/145.1, 222/145.4, 222/145.7, 222/145.8, 134/95.1, 134/99.1, 134/99.2, 134/100.1, 68/17.R
• US Class Current: 222/136
• CPC Class Codes: B65D 81/3288 composed of two or more separate containers joined to each other
• CPC Class Codes: C11D 17/0013 Liquid compositions with insoluble particles in suspension C11D17/0021, C11D17/0026, C11D17/003 take precedence
• CPC Class Codes: C11D 17/041 Compositions releasably affixed on a substrate or incorporated into a dispensing means
• CPC Class Codes: C11D 17/046 Insoluble free body dispenser
• CPC Class Codes: C11D 3/3942 Inorganic per-compounds C11D3/3902 takes precedence
• CPC Class Codes: C11D 3/3945 Organic per-compounds C11D3/3902 takes precedence
• CPC Class Codes: C11D 7/24 Hydrocarbons
• CPC Class Codes: C11D 7/261 Alcohols; Phenols
• CPC Class Codes: C11D 7/263 Ethers
• CPC Class Codes: C11D 7/32 containing nitrogen
• CPC Class Codes: C11D 7/50 Solvents

Abstract

A detergent pack for use in conjunction with a washing machine and which comprises two or more detergent or auxiliary products, storage means comprising separate but associated portions of the two or more products, and means for delivering quantities of the two or more products into the same or different cycles of a washing machine, said means for delivering comprising means for dispensing quantities of the two or more products, and means for controlling the relative dispensing rate of the two or more products from the storage means.

Claims

1. A detergent pack for use in conjunction with a washing machine, comprising:

two or more detergent or auxiliary products;

storage means comprising separate but associated portions of the two or more products; and

means for delivering quantities of the two or more products into the same or different cycles of a washing machine;

wherein the means for delivering comprises means for dispensing quantities of the two or more products, and means for controlling the relative dispensing rate of the two or more products from the storage means;

wherein the means for dispensing comprises one or more conduit means communicating with one or more dispensing orifices and having one or more valve means associated therewith to enable or cut off the flow of product through the one or more dispensing orifices, and one or more valves situated at or proximal the inlet of the conduit means to enable venting of the product container.

2. A pack according to claim 1 wherein the storage means comprises at least two product containers for separate storage of the two or more detergent or auxiliary products.

3. A pack according to claim 1 comprising means for refilling the storage means or wherein the storage means can be removed and replaced as a unit for the purpose of recharging the pack with fresh product.

4. A pack according to claim 1 incorporating an outer shell and wherein the storage means is adapted to fit wholly or partially within the outer shell whereby the outer shell forms at least part of the external framework of the pack.

5. A pack according to claim 1 wherein the storage means comprises two or more product containers mounted in an inverted orientation with corresponding outlets directed in a generally downward direction to provide gravitational-assisted dispensing therefrom.

6. A pack according to claim 5 wherein the volumes of the two or more product containers are in integer ratio to one another.

7. A pack according to claim 1, wherein the conduit means comprises flexible tubes having the same or different diameter and leading from the storage means to the outlet with a common valve means or to each dispensing orifice.

8. A pack according to claim 7 comprising separate conduit means for each of the two or more products, the separate conduit means communicating with a common valve means.

9. A pack according to claim 1, wherein the valve means comprises a slit seal valve.

10. A pack according to claim 1 wherein the means for controlling the relative dispensing rate comprises one or more electrically operated pumps adapted to dispense the two or more products at given flow rates, or for given dispensing times or in a given product dispensing sequence.

11. A pack according to claim 10 comprising means for pumping the two or more products in a reverse direction at the end of the dispensing cycle in order to prevent excess product dripping from the dispensing orifices.

12. A pack according to claim 1 wherein the means for controlling the relative dispensing rate comprises a positive displacement pump.

13. A pack according to claim 12 wherein the positive displacement pump is a peristaltic pump.

14. A pack according to claim 1 comprising a plurality of flexible tubes acting as conduit means for the two or more products and comprising a peristaltic pump operatively associated with the plurality of flexible tubes to control the relative dispensing rate of the two or more products.

15. A pack according to claim 14 wherein the relative dispensing rate is controlled by adjusting the relative diameter of the flexible tubes and the rheology of the detergent or auxiliary products.

16. A pack according to claim 1 wherein the detergent or auxiliary products are delivered in a generally downward direction from one or more dispensing orifices situated at or near the bottom of the pack.

17. A pack according to claim 1 wherein the pack is a hand-held self-contained pack.

18. A pack according to claim 1 comprising an automatic cut-off switch operable when the pack is resting on a surface.

19. A pack according to claim 1 additionally incorporating means for preselecting the quantities of the two or more products to be dispensed from the storage means and means overriding the preselecting means to provide continuous dispensing of the two or more products.

20. A pack according to claim 1 additionally incorporating means to provide a visual indication of dispensing, said means being in the form of a moveable spout activated during dispensing and situated in the vicinity of the one or more dispensing orifices.

21. A pack according to claim 1 for use in automatic dishwashing and wherein the pack comprises an organic solvent composition and an automatic dishwashing detergent composition.

22. A pack according to claim 21 wherein the organic solvent composition comprises an organic solvent system acting as carrier solvent or as agent for removing cooked-, baked- and burnt-on soils.

23. A pack according to claim 22 wherein the organic solvent system is selected from alcohols, amines, esters, glycol ethers, glycols, terpenes and mixtures thereof.

24. A pack according to claim 22 wherein the organic solvent system is selected from organoamine solvents, alcoholic solvents, glycols and glycol derivatives and mixtures thereof.

25. A pack according to claim 22 wherein the organic solvent comprises organoamine solvent and glycol ether solvent and wherein the glycol ether solvent is selected from ethylene glycol monobutyl ether, diethylene glycol monobutyl ether, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, propylene glycol monobutyl ether, dipropylene glycol, dipropylene glycol methyl ether, dipropylene glycol monobutyl ether, ethylene glycol phenyl ether and mixtures thereof.

26. A pack according to claim 21 wherein at least one product comprises a detergency enzyme.

27. A pack according to claim 21 wherein at least one product comprises an alkalinity source.

28. A pack according to claim 21 wherein at least one of the products comprises a spreading auxiliary selected from organic solvents, wetting agents and mixtures thereof such that the liquid surface tension of the spreading auxiliary is less than about 30 mN/m.

29. A pack according to claim 1 wherein the two or more detergent or auxiliary products are in gel form, the rheology of the gel-form compositions being matched to provide dispensing of the two or more products at a controlled relative dispensing rate.

30. A pack according to claim 1 wherein at least one product is an anhydrous composition.

31. A pack according to claim 30, wherein the anhydrous composition comprises a particulate bleach suspension in a non-aqueous liquid carrier.

32. A pack according to claim 31 wherein the particulate bleach is selected from inorganic peroxides, organic peracids and mixtures thereof.

33. A pack according to claim 31 wherein the particulate bleach has a particle size from about 10 μ

m to about 500 μ

m.

34. A pack according to claim 31 wherein the particulate bleach is perborate.

35. A pack according to claim 31 wherein the anhydrous composition comprises a free radical scavenger selected from benzoic acids, sulfobenzenes and mixtures thereof.

36. A pack according to claim 31 wherein the anhydrous composition comprises a cellulosic thickener material.

37. A pack according to claim 31, wherein the density difference between the particulate bleach suspension and the non-aqueous liquid carrier is less than about 500 Kg/m³.

38. A pack according to claim 31 wherein the suspension has a viscosity of from about 1,000 Kg/m s⁻

1 to about 100,000 Kg/m s<sup>−

1</sup> at shear rate of 1s<sup>−

1</sup>; and

from about 500 Kg/m s<sup>−

1</sup> to about 50,000 Kg/m s<sup>−

1</sup> at shear rate of 150s<sup>−

1</sup> as measured using a Contraves Rheometer with 40 mm diameter parallel plate at 25°

C.

39. A washing machine incorporating a built-in or replaceable detergent pack according to claim 1 and being programmable in accordance with the requirements of the user or of the wash process parameters to automatically deliver quantities of the two or more products from the storage means into the same or different cycles of the washing machine.

40. A method of delivering two or more detergent or auxiliary products into a washing machine comprising the use of a detergent pack according to claim 1.