Patent US4566911A successfully refreshed from Google Patents.
US4566911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for cleaning article by scrubbing with cleaning roll
Assignee: KANEBO Ltd A CORPOF JAPAN
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Filing: 1983-07-05
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Granted: 1986-01-28
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Expires: 2003-07-05
Abstract
Abstract Effective cleaning of an article can be achieved by a method comprising scrubbing the surface of the article by means of a cleaning roll having a surface layer of polyvinyl acetal porous elastic material having a porosity of 85% to 95%, an average pore opening of 10 to 200 mu m, and a 30% compression stress in the state characterized by a water content of 100% based, on the dry weight of the material, of 15 to 150 g/cm2.
Inventors
- 👤 Yogi Tomita
- 👤 Hisashi Yamamoto
- 👤 Susumu Kitagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:22
CPC Classifications
B; B08; B08B; B08B11/00; B08B11/04; B08B1/00; B08B1/30; B08B1/32; B08B1/34; B08B2230/00; B08B2230/01
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
112 words
A method for thorough cleaning of a finely finished surface of an article of glass or metal by removing cuttings, shavings, turnings, abrasive grains and fine particles from said surface, comprising scrubbing said surface by means of a cleaning roll having a surface layer of polyvinyl acetal porous elastic material having a porosity of 85% to 95%, an average pore opening of 10 to 200 μm, and a 30% compression stress, at a water content of 100% based on the dry weight of the material, of 15 to 150 g/cm 2 , whereby said surface is thoroughly cleaned of even fine particles without causing damage to the fine finish of said surface.
Claim 2
Independent Claim
112 words
A method for thorough cleaning of a finely finished surface of an article of glass or metal by removing cuttings, shavings, turnings, abrasive grains and fine particles from said surface, comprising scrubbing said surface by means of a cleaning roll having a surface layer of polyvinyl acetal porous elastic material having a porosity of 85% to 95%, an average pore opening of 10 to 200 μm, and a 30% compression stress, at a water content of 100% based on the dry weight of the material, of 15 to 150 g/cm 2 , whereby said surface is thoroughly cleaned of even fine particles without causing damage to the fine finish of said surface.
Claim 3
Dependent Claim
24 words
A method as claimed in claim 1, wherein the surface layer of the polyvinyl acetal porous elastic material of the cleaning roll is flat.
Claim 4
Dependent Claim
42 words
A method as claimed in claim 1, wherein the surface layer of the polyvinyl acetal porous elastic material of the cleaning roll is gear-like in configuration, having many parallel grooves formed at an angle to the roll axis of 0° to 90°.
Claim 5
Dependent Claim
33 words
A method as claimed in claim 1, wherein the surface layer of the polyvinyl acetal porous elastic material of the cleaning roll is of a configuration having many projections of a prescribed shape.
Claim 6
Dependent Claim
26 words
A method as claimed in claim 1, wherein the scrubbing is carried out in the presence of water, an aqueous detergent solution, or an organic solvent.
Claim 7
Dependent Claim
21 words
The method as claimed in claim 1, wherein the fine particles being removed have a diameter of less than 5 μm.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |