US4355489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive article comprising abrasive agglomerates supported in a fibrous matrix
Assignee: 3M Co
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Filing: 1980-09-15
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Granted: 1982-10-26
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Expires: 2000-09-15
Abstract
Abstract An abrasive article comprising a plurality of separated abrasive agglomerates distributed within a matrix of undulated filaments is provided. The invention also provides a method of making an abrasive article comprising forming, within a lofty open web comprising undulated filaments bonded at points of mutual contact, a plurality of separated abrasive agglomerates to provide an abrasive agglomerate-impregnated web. Articles may be prepared of the agglomerate-impregnated web per se or by laminating layers of the web together preferably under pressure. Exemplary articles include abrasive wheels, discs, belts, sheets, blocks and the like.
Inventors
- 👤 Raymond F. Heyer
- 👤 William R. Lovness
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:32
CPC Classifications
B; B24; B24D; B24D11/00; B24D18/00; B24D18/0036; B24D3/00; B24D3/001; B24D3/002; B24D3/02; B24D3/20; B24D3/28; B24D7/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
59 words
An abrasive article comprising: a matrix comprising undulated filaments bonded at points of mutual contact; and a plurality of separated abrasive agglomerates at least 2 mm in average particle size distributed within said matrix, said abrasive agglomerates comprising abrasive particles bonded together with a bonding agent to provide an abrasive particle to bonding agent weight ratio of about 1:1-20:1.
Claim 2
Dependent Claim
59 words
An abrasive article comprising: a matrix comprising undulated filaments bonded at points of mutual contact; and a plurality of separated abrasive agglomerates at least 2 mm in average particle size distributed within said matrix, said abrasive agglomerates comprising abrasive particles bonded together with a bonding agent to provide an abrasive particle to bonding agent weight ratio of about 1:1-20:1.
Claim 3
Dependent Claim
12 words
The abrasive article of claim 1 in the form of a wheel.
Claim 4
Dependent Claim
12 words
The abrasive article of claim 1 in the form of a belt.
Claim 5
Dependent Claim
12 words
The abrasive article of claim 1 in the form of a disc.
Claim 6
Dependent Claim
18 words
The abrasive article of claim 2 wherein said matrix has a void volume on the order of 70-97%.
Claim 7
Dependent Claim
12 words
The abrasive article of claim 1 wherein said filaments are organic filaments.
Claim 8
Dependent Claim
25 words
The abrasive article of claim 6 wherein said organic filaments are formed of an organic material selected from the group consisting of nylon and polyester.
Claim 9
Dependent Claim
31 words
The abrasive article of claim 1 wherein said filaments are bonded together by an organic binder selected from the group consisting of phenolic resin, epoxy resin, acrylic resin, isocyanurate and polyurethane.
Claim 10
Dependent Claim
31 words
The abrasive article of claim 6 wherein said filaments are on the order of 3 to 500 denier and said matrix is on the order of 2 to 50 mm thick.
Claim 11
Dependent Claim
28 words
The abrasive article of claim 1 wherein said bonding agent is selected from the group consisting of phenolic resin, urea-formaldehyde, shellac, epoxy resin, isocyanurate, polyurethane, and hide glue.
Claim 12
Dependent Claim
33 words
The abrasive article of claim 2 wherein said aggregates have an average particle size on the order of 2-15 mm and said wheel has an average diameter on the order of 25-500 mm.
Claim 13
Dependent Claim
16 words
The abrasive article of claim 1 further including an elastomeric reinforcing material impregnated throughout said matrix.
Claim 14
Dependent Claim
15 words
The abrasive article of claim 12 wherein said elastomeric reinforcing material is a polymeric foam.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-25 | 1986-04-26 | 1986-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-25 | 1990-04-26 | 1990-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-25 | 1994-04-26 | 1994-10-26 | $7700.00 | Window Closed / Lapsed |