Method for mechanical cleaning of textiles or solid objects utilizing an encapsulated enzyme

• US 8,101,562 B2
• Filed: 03/02/2007
• Issued: 01/24/2012
• Est. Priority Date: 10/27/2000
• Status: Expired due to Fees

• Current Assignee: BSH Hausgeraete GmbH (Robert Bosch GmbH)
• Original Assignee: BSH Bosch und Siemens Hausgerã¤Te GmbH (Robert Bosch GmbH)
• Inventors: Classen, Egbert
• Primary Examiner(s): BOYER, CHARLES I
• Application Number:
  US11/713,339
• Publication Number:
  US 20070155643A1
• Time in Patent Office: 1,789 Days
• Field of Search: 510/226, 510/220, 510/276, 510/300, 510/305, 510/320, 510/349, 510/392
• US Class Current: 510/226
• CPC Class Codes: A47L 15/44 Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
• 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 2111/44 Multi-step processes
• CPC Class Codes: C11D 3/386 Preparations containing enzymes , e.g. protease or amylase
• CPC Class Codes: C11D 3/38672 Granulated or coated enzymes
• CPC Class Codes: D06F 39/02 Devices for adding soap or other washing agents
• CPC Class Codes: D06L 4/40 using enzymes

Abstract

Water-soluble detergents and enzymes are used for mechanically cleaning textiles or crockery. According to the invention, enzymes with a catalytic effect on typical stains are added to the washing or cleaning process, only for as long as their catalytic effect is desired. This avoids superfluous removal of the enzymes that have been used in a washing or cleaning process.

Claims

1. A method for washing objects in a washing device including a washing liquid container, an enzyme container, and a detergent container, the method comprising the acts of:

providing enzymes in the enzyme container, the enzymes being retained in at least one capsule provided in the enzyme container;

providing a detergent in the detergent container;

starting a first washing cycle and introducing an initial washing liquid into the washing liquid container;

circulating the initial washing liquid from the washing liquid container through the enzyme container and back into the washing liquid container to transport a limited quantity of the enzymes retained in the at least one capsule into the washing liquid container for a first time period, the at least one capsule being permeable to said washing liquid but insoluble in water;

stopping the circulation of the initial washing liquid through the enzyme container at the end of the first time period;

introducing additional washing liquid into the washing liquid container, after the first time period, through the detergent container to transport the detergent into the washing liquid container for a second time period; and

removing the washing liquid from the washing liquid container.

2. The method according to claim 1, further comprising the act of increasing the temperature of the washing liquid after performing the act of circulating the initial washing liquid through the enzyme container.

3. The method according to claim 1, wherein the initial washing liquid is substantially free of detergent including alkaline cleaning agents.

4. The method according to claim 1, wherein the at least one capsule comprises a polymer membrane which is permeable to the washing liquid but insoluble in water.

5. The method according to claim 1, further comprising the act of starting a second washing cycle utilizing enzymes remaining in the at least one capsule after the first washing cycle.

6. The method according to claim 5, wherein the second washing cycle repeats the acts of:

introducing an initial washing liquid into the washing liquid container;

circulating the initial washing liquid through the enzyme container and back into the washing liquid container to transport a limited quantity of the enzymes into the washing liquid container for a first time period;

stopping the circulation of the initial washing liquid through the enzyme container;

introducing additional washing liquid into the washing liquid container after the first time period through the detergent container to transport the detergent into the washing liquid container for a second time period; and

removing the washing liquid from the washing liquid container.

13. The method according to claim 1, wherein the initial washing liquid is substantially free of detergent including alkaline cleaning agents.

7. A method for washing objects in a washing device including a washing liquid container, an enzyme container, and a detergent container, the method comprising the acts of:

providing enzymes in the enzyme container, the enzymes being retained in at least one capsule provided in the enzyme container;

providing a detergent in the detergent container;

starting a first washing cycle including the acts of;

circulating washing liquid through the enzyme container into the washing liquid container to transport a limited quantity of the enzymes retained in the at least one capsule into the washing liquid container, the at least one capsule being permeable to said washing liquid but insoluble in water;

stopping the circulation of the washing liquid through the enzyme container;

passing additional washing liquid through the detergent container, after stopping the circulation of the washing liquid through the enzyme-container, to transport the detergent into the washing liquid container; and

removing the washing liquid from the washing liquid container;

starting a second washing cycle utilizing enzymes remaining in the at least one capsule after the first washing cycle, the second washing cycle including the acts of;

circulating washing liquid through the enzyme container into the washing liquid container to transport a limited quantity of the enzymes retained in the at least one capsule into the washing liquid container;

stopping the circulation of the washing liquid through the enzyme container;

passing additional washing liquid through the detergent container, after stopping the circulation of the washing liquid through the enzyme-container, to transport the detergent into the washing liquid container; and

removing the washing liquid from the washing liquid container.

8. The method according to claim 7, further comprising the act of increasing the temperature of the washing liquid after performing the act of circulating the washing liquid through the enzyme container.

9. The method according to claim 7, wherein the washing liquid circulated through the enzyme container is substantially free of detergent including alkaline cleaning agents.

10. The method according to claim 7, wherein the enzymes are macroscopically encapsulated in a polymer membrane which is permeable to the washing liquid but insoluble in water.

11. A method for washing objects in a washing apparatus including a washing liquid container, an enzyme container containing at least one capsule permeable to washing liquid but insoluble in water and containing catalytically-acting enzymes, and a detergent container containing detergent, the method comprising:

introducing initial washing liquid into the washing liquid container;

upon the first initial washing liquid reaching a predetermined level, circulating the washing liquid between the washing liquid container and the enzyme container for a first time period to dissolve a limited quantity of enzymes contained in the at least one capsule to catalyze a first washing process;

after the first time period, introducing additional washing liquid into the washing liquid container through the detergent container for a second time period to transport detergent from the detergent container into the washing liquid container for a second washing process; and

removing the washing liquid from the washing liquid container.

12. The method according to claim 11, further comprising:

increasing the temperature of the washing liquid after circulating the washing liquid through the enzyme container.

14. The method according to claim 11, wherein the catalytically-acting enzymes are macroscopically encapsulated in the at least one capsule which comprises a polymer membrane which is permeable to the washing liquid but insoluble in water.

15. The method according to claim 11, further comprising:

filtering the initial washing liquid.

16. The method according to claim 15, wherein filtering the initial washing liquid comprises filtering the initial washing liquid as it is circulated from the washing liquid container to the enzyme container.

17. The method according to claim 15, wherein filtering the initial washing liquid comprises filtering the initial washing liquid as it is circulated from the enzyme container to the washing liquid container.

18. The method according to claim 11, further comprising:

circulating second initial washing liquid between the washing liquid container and the enzyme container utilizing enzymes remaining in the at least one capsule after the first washing process to catalyze a third washing process;

passing second additional washing liquid through the detergent container to transport detergent from the detergent container into the washing liquid container for a fourth washing process; and

removing all of the second washing liquid from the washing liquid container.

19. The method according to claim 18, further comprising:

increasing the temperature of the second initial washing liquid after circulating the second initial washing liquid through the enzyme container.

20. The method according to claim 18, wherein the second initial washing liquid is substantially free of detergent including alkaline cleaning agents.