Patent US4486200A successfully refreshed from Google Patents.
US4486200A
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Method of making an abrasive article comprising abrasive agglomerates supported in a fibrous matrix
Assignee: 3M Co
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Filing: 1982-09-09
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Granted: 1984-12-04
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Expires: 2002-09-09
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
2026-10-29 20:21
CPC Classifications
B; B24; B24D; B24D18/00; B24D18/0036; B24D3/00; B24D3/001; B24D3/002; B24D3/02; B24D3/20; B24D3/28; B24D7/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
119 words
A method of making an abrasive article, said method comprising the steps of forming within a lofty web comprising undulated filaments bonded at points of mutual contact by depositing in a pattern with an appropriate printing or extruding device a plurality of separated agglomerates formed of a mixture of uncured liquid curable bonding agent and abrasive particles, said agglomerates having an average particle size of at least 2 mm to provide an agglomerate-impregnated web; and curing said bonding agent to convert said agglomerates to abrasive agglomerates comprising abrasive particles bonded together with said bonding agent, said bonding agent and said abrasive particles being selected to provide an abrasive particle to bonding agent weight ratio of about 1:1 to 20:1.
Claim 2
Independent Claim
119 words
A method of making an abrasive article, said method comprising the steps of forming within a lofty web comprising undulated filaments bonded at points of mutual contact by depositing in a pattern with an appropriate printing or extruding device a plurality of separated agglomerates formed of a mixture of uncured liquid curable bonding agent and abrasive particles, said agglomerates having an average particle size of at least 2 mm to provide an agglomerate-impregnated web; and curing said bonding agent to convert said agglomerates to abrasive agglomerates comprising abrasive particles bonded together with said bonding agent, said bonding agent and said abrasive particles being selected to provide an abrasive particle to bonding agent weight ratio of about 1:1 to 20:1.
Claim 3
Dependent Claim
65 words
The method of claim 1 also including the steps of cutting segments of the agglomerate-impregnated web to a desired size, stacking the cut segments to form an assembled pile, contacting the assembled pile under pressure with a compacting force, adhering the compacted pile together in a manner which permits retention of the compacted shape after removal of the compacting force, and removing the compacting force.
Claim 4
Dependent Claim
17 words
The method of claim 2 also including the step of forming a wheel of said compacted pile.
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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) | 1987-12-04 | 1988-06-04 | 1988-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-04 | 1992-06-04 | 1992-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-04 | 1996-06-04 | 1996-12-04 | $7700.00 | Window Closed / Lapsed |