Device for conditioning fabrics in a tumble-dryer

• US 4,567,675 A
• Filed: 05/12/1983
• Issued: 02/04/1986
• Est. Priority Date: 05/20/1982
• Status: Expired due to Term

• Current Assignee: Lever Brothers Company (Unilever PLC)
• Original Assignee: Lever Brothers Company (Unilever PLC)
• Inventors: Rennie, George K.
• Primary Examiner(s): Schwartz, Larry I.
• Assistant Examiner(s): Westphal, David W.
• Application Number:
  US06/494,143
• Time in Patent Office: 999 Days
• Field of Search: 34/12, 34/60, 206/0.5, 206/524.6, 252/8.6, 252/8.8
• US Class Current: 34/60
• CPC Class Codes: C11D 17/047 Arrangements specially adapted for dry cleaning or laundry dryer related applications
• CPC Class Codes: D06F 58/203 Laundry conditioning arrangements
• CPC Class Codes: D06M 23/00 Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process

Abstract

A device for conditioning fabrics in the tumble-dryer comprises a powdered conditioning agent inside a permeable container, for example a sachet of paper, nonwoven fabric or plastics film, which in turn is inside an outer, substantially form-retaining, apertured container. The outer container is of a shape, for example, spherical, which allows ready movement among the tumbled fabrics. As it moves, the article gives more uniform and efficient conditioning than articles in the form of a sheet substrate impregnated with a solid conditioning agent.

Claims

1. A device for conditioning fabrics in a tumble dryer, which device comprises a fabric conditioning composition in free-flowing powder form disposed within a sachet or flexible sheet material having at least one wall area permeable to said composition in powder form, the sachet being disposed within an outer container having openings for the egress of said composition in powder form, the outer container being substantially form-retaining and of a shape such as to allow ready tumbling thereof among the fabrics in a dryer, and the sachet being removable and replaceable.

2. The device of claim 1, wherein the second container is of a size such that its largest dimension is at least 6 cm.

3. The device of claim 1, wherein the second container comprises plastics material.

4. The device of claim 3, wherein the second container is of thermoplastic material having a softening point above 130°

C.

5. The device of claim 3, wherein the second container is of polypropylene or high-density polyethylene.

6. The device of claim 1, wherein the second container comprises paper or board.

7. The device of claim 1, wherein the shape of the second container is such that the ratio of its principal axes (major to minor) is less than 3:

1.

8. The device of claim 7, wherein the shape of the second container is such that the ratio of its principal axes (major to minor) is approximately 1:

1.

9. The device of claim 1, wherein the shape of the second container substantially approximates to a shape selected from the group consisting of a sphere, a spheroid, an ellipsoid, a cylinder, a frustocone, a cube, two abutting frustocones and a hexagonal prism.

10. The device of claim 1, wherein the second container is separable into two or more separate, joined or integral parts whereby the first container can be removed or inserted.

11. The device of claim 1, wherein an aperture of the second container is enlargeable by flexure whereby the first container can be removed or inserted, the second container being of single piece construction.

12. The device of claim 1, wherein the first container is a sachet of paper, nonwoven fabric, plastics film or a laminate of any two or more of said materials.

13. The device of claim 1, wherein the first container is provided with an outer covering impermeable to the powdered fabric conditioning composition, the outer covering being in intimate contact with any surface region of the first container permeable to the fabric conditioning composition.

14. The device of claim 13, wherein the first container is a sachet of paper or nonwoven fabric permeable to the powdered fabric conditioner over part or whole of its area, and the outer covering comprises metal foil laminated to said paper or nonwoven fabric, at least part of said metal foil being readily removable to expose a permeable area of said paper or nonwoven fabric.

15. The device of claim 13, wherein the first container is a sachet of plastics film having paper or nonwoven fabric laminated thereto on its outermost side and having a plurality of openings for the passage of powdered fabric conditioner, and the outer covering comprises one or more pieces of paper coated with pressure-sensitive adhesive positioned so as to cover and close said openings.

16. The device of claim 1, wherein the fabric conditioning composition has a particle size range within the range of from 20 to 100 μ

m.

17. The device of claim 16, wherein the fabric conditioning composition has a particle size range within the range of 70 to 500 μ

m.

18. The device of claim 16, wherein the fabric conditioning composition has a particle size range within the range of from 90 to 250 μ

m.

19. The device of claim 1, wherein the fabric conditioning composition comprises a cationic and/or nonionic fabric conditioning agent.

20. The device of claim 19, wherein the fabric conditioning composition comprises a fabric-softening quaternary ammonium salt.

21. The device of claim 19, wherein the fabric conditioning composition includes distearyl dimethyl ammonium chloride.

22. The device of claim 1, wherein the first container contains from 0.5 to 12 g of the fabric conditioning composition.

23. The device of claim 22, wherein the first container contains from 1.5 to 10 g of the fabric conditioning composition.

24. The device of claim 22, wherein the first container contains from 2 to 7 g of the fabric conditioning composition.