Method for mechanical cleaning of textiles or solid objects comprising encapsulated enzymes

• US 7,977,295 B2
• Filed: 03/02/2007
• Issued: 07/12/2011
• 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:
  US11/713,338
• Publication Number:
  US 20070155642A1
• Time in Patent Office: 1,593 Days
• Field of Search: 510/220, 510/226, 510/276, 510/300, 510/305, 510/320, 510/349, 510/392, 68/9, 68/27, 134/94.1, 222/651, 222/638, 137/624.18, 815/8
• 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 washing apparatus, for cleaning textiles or solid objects using enzymes and at least one of water-soluble detergents and cleaning agents, comprising:

a washing liquid container with a source of washing liquid;

an enzyme container configured to contain at least one capsule that retains catalytically-acting enzymes, the at least one capsule of said catalytically-acting enzymes being permeable to said washing liquid but insoluble in water;

a detergent container to contain at least one of water-soluble detergents and cleaning agents; and

a pump connected between the washing liquid container and the enzyme container, the pump configured to circulate the washing liquid between the washing liquid container and the enzyme container and back to the washing liquid container for a first time period of a washing process to transport a limited quantity of the enzymes retained in the at least one capsule into the washing liquid container for the first time period, and before additional washing liquid is added through the detergent container to wash at least one of the water-soluble detergents and cleaning agents out of the detergent container and into said washing liquid container in said washing or cleaning process for a second time period.

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

3. The apparatus according to claim 2, wherein the at least one capsule comprises a plurality of hollow body capsules linked to one another.

4. The apparatus according to claim 3, wherein the plurality of hollow body capsules are linked to form at least one of cartridges, bars and tubular bodies.

5. The apparatus according to claim 3, wherein the plurality of hollow body capsules are stationarily and replaceably located in said enzyme container accessible to said circulating washing liquid.

6. The apparatus according to claim 5, wherein the enzyme container comprises at least one filter for filtering out insoluble impurities from said washing liquid at least as said washing liquid is circulated into or out of said enzyme container.

7. The apparatus according to claim 6, wherein the at least one filter comprises a first filter for filtering out the insoluble impurities from said washing liquid as said washing liquid is circulated into said enzyme container and a second filter for filtering out the insoluble impurities from said washing liquid as said washing liquid is circulated out of said enzyme container.

8. The apparatus according to claim 2, wherein the at least one capsule retains a plurality of different enzymes suitable to act on various different types of stains.

9. The apparatus according to claim 8, wherein the plurality of different enzymes include a specific enzyme for each type of stain occurring in said washing liquid in said washing process.

10. A washing apparatus for cleaning textiles or solid objects using enzymes and at least one of water-soluble detergents and cleaning agents, the washing apparatus comprising:

a washing liquid container configured to contain the textiles or solid objects, the washing liquid container being configured to receive a washing liquid;

an enzyme container containing at least one capsule that retains catalytically-acting enzymes, the enzyme container being connected to the washing liquid container, and the at least one capsule being permeable to said washing liquid but insoluble in water;

a pump connected to the washing liquid container and to the enzyme container, the pump being configured to circulate the washing liquid between the washing liquid container and the enzyme container to transport a limited quantity of the enzymes from the enzyme container to the washing liquid container for a first time period in a first washing or cleaning process for removing typical stains, the pump being configured to begin circulating the washing liquid when a level of the washing liquid being added to the washing liquid container reaches a predetermined level; and

a detergent container configured to contain a supply of water-soluble detergent and/or cleaning agents, wherein the pump is configured to stop circulating the washing liquid between the washing liquid container and the enzyme container after the first time period and before the water-soluble detergents and/or cleaning agents are added to the washing liquid container for a second time period.

11. The apparatus according to claim 10, wherein the at least one capsule macroscopically encapsulates the enzymes in a polymer membrane which is permeable to the washing liquid but insoluble in water.

12. The apparatus according to claim 11 wherein the at least one capsule comprises a plurality of hollow body capsules linked to one another.

13. The apparatus according to claim 12, wherein the plurality of hollow body capsules are linked to form at least one of cartridges, bars and tubular bodies.

14. The apparatus according to claim 12, wherein the plurality of hollow body capsules are stationarily and replaceably located in the enzyme container accessible to the circulating washing liquid.

15. The apparatus according to claim 10, wherein the enzyme container comprises at least one filter for filtering out insoluble impurities from the washing liquid at least as the washing liquid is circulated into or out of the enzyme container.

16. The apparatus according to claim 15, wherein the at least one filter comprises a first filter for filtering out the insoluble impurities from the washing liquid as the washing liquid is circulated into the enzyme container and a second filter for filtering out the insoluble impurities from the washing liquid as the washing liquid is circulated out of the enzyme container.

17. The apparatus according to claim 11, wherein a plurality of different enzymes suitable to act on various different types of stains are macroscopically encapsulated.

18. The apparatus according to claim 17, wherein the plurality of different enzymes includes a specific enzyme for each type of stain occurring in the washing liquid.

19. The apparatus according to claim 10, wherein the washing liquid container is connected to the pump by a first pipe and the enzyme container is connected to the pump by a second pipe.

20. The apparatus according to claim 10, further comprising a valve configured to control a flow of the washing liquid to the detergent container.