Method for treating laundry and suitable laundry treatment device for carrying out said method

• US 9,217,219 B2
• Filed: 05/28/2010
• Issued: 12/22/2015
• Est. Priority Date: 06/05/2009
• Status: Expired due to Fees

• Current Assignee: BSH Hausgeraete GmbH (Robert Bosch GmbH)
• Original Assignee: BSH Hausgeraete GmbH (Robert Bosch GmbH)
• Inventors: Hanau, Andreas, Hasse, Torsten, Schaub, Hartmut
• Primary Examiner(s): Barr, Michael
• Assistant Examiner(s): Shahinian, Levon J
• Application Number:
  US13/319,551
• Publication Number:
  US 20120060302A1
• Time in Patent Office: 2,034 Days
• Field of Search: 68/121.8, 68/17.R
• US Class Current: 1/1
• CPC Class Codes: D06F 35/005 Methods for washing, rinsing or spin-drying
• CPC Class Codes: D06F 39/08 Liquid supply or discharge arrangements supply of soap or other washing agents D06F39/02
• CPC Class Codes: D06F 58/203 Laundry conditioning arrangements

Abstract

In a method for applying a treatment composition to a laundry item in a laundry treatment device having a rotatably mounted drum and a water supply, water is added to the laundry item in a first rotation step of the drum to set a pre-determined residual moisture content. A treatment composition is sprayed onto the laundry item with the aid of the water supply in a second rotation step of the drum, when the drum is rotated at a rotary speed which is equal to or greater than a centrifugal adhesion rotary speed.

Claims

1. A method for applying a treatment composition to a laundry item in a laundry treatment device having a rotatably mounted drum, a water supply, a reservoir for the treatment composition, and an injection device with a mixing container into which the treatment composition can be dosed, said method comprising:

adding water to the laundry item in a first rotation step of the drum to set a pre-determined residual moisture content;

adding the treatment composition to the mixing container from the reservoir prior to contacting the laundry item; and

spraying the treatment composition from the mixing container onto the laundry item in a second rotation step of the drum with the aid of the water supply, when the drum is rotated at a rotary speed which is equal to or greater than a centrifugal adhesion rotary speed,

wherein the treatment composition does not comprise laundry detergent.

2. The method of claim 1, wherein the adding step is executed in a rinsing step, with the first rotation step of the drum taking place simultaneously with pumping out or following pumping out of the water.

3. The method of claim 1, wherein the pre-determined residual moisture content is set by rotating the drum in the first rotation step at the centrifugal adhesion rotary speed.

4. The method of claim 1, wherein the drum rotates in the first rotation step at a rotary speed of ≧

100 revolutions per minute (rpm).

5. The method of claim 1, further comprising distributing the treatment composition in the laundry item in a third rotation step of the drum at a rotary speed which is lower than the centrifugal adhesion rotary speed.

6. The method of claim 1, wherein the spraying step is carried out with the injection device.

7. The method of claim 6, further comprising moving the drum in a third rotation step at a rotary speed below the centrifugal adhesion rotary speed in a reversing mode, and dispensing the treatment composition by the injection device only when the drum is moved at or above the centrifugal adhesion rotary speed.

8. The method of claim 1, further comprising a washing phase in which the laundry item is cleaned with the aid of laundry detergent, the washing phase occurring prior to the first rotation step.

9. The method of claim 1, wherein the treatment composition comprises fabric softener.

10. The method of claim 1, wherein the treatment composition comprises an impregnating agent, a dye, a starch, a cyclodextrin or a microcapsule.

11. The method of claim 1, further comprising fixing the treatment composition with a heat treatment or a chemical treatment following the second rotation step.

12. The method of claim 1, further comprising chemically activating a surface of the laundry item prior to spraying the treatment composition.

13. The method of claim 1, wherein the treatment composition is fixed to the laundry item.

14. The method of claim 13, wherein the treatment composition is

bonded to a surface of the laundry item, or

introduced between fibers of the laundry item, or

bonded to the surface of the laundry item and introduced between the fibers of the laundry item.

15. A laundry treatment device, comprising

a rotationally mounted drum;

a water supply adapted to add water to the drum to thereby set a pre-determined residual moisture content in a laundry item in the drum in a first rotation step of the drum;

a reservoir for a treatment composition, and

an injection device with a mixing container into which the treatment composition is adapted to be dosed from the reservoir prior to contacting the laundry item, the injection device being adapted to cooperate with the water supply and to apply the treatment composition onto the laundry item in the drum by spraying the treatment composition with the aid of the water supply onto the laundry item in a second rotation step of the drum at a rotary speed which is equal to or greater than a centrifugal adhesion rotary speed,

wherein the treatment composition does not comprise laundry detergent.

16. The laundry treatment device of claim 15, constructed in the form of a washing machine.

17. The laundry treatment device of claim 15, wherein the device is an injection device adapted to inject the treatment composition into the drum and onto the laundry item.

18. The laundry treatment device of claim 17, wherein the injection device is switchable independently of the drum.

19. The laundry treatment device of claim 17, wherein the injection device is regulable.

20. The laundry treatment device of claim 15, further comprising a distributor adapted to promote a distribution of the treatment composition in the laundry item.

21. The laundry treatment device of claim 20, wherein the distributor is a laundry agitator which is optimized with regard to the distribution of the treatment composition in the laundry item.