US3699727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive article and method of fabrication
Assignee: 3M Co
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Filing: 1971-04-30
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Granted: 1972-10-24
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Expires: 1991-04-30
Abstract
Abstract A continuous elongate flexible sheet bearing erect abrasive flaps, each held by an individual island of binder that is adherently bonded to the flexible support, can be formed into an abrasive flap wheel, endless belts, etc. The article is prepared by applying liquid binder to the sheet, inserting the flaps, isolating the islands, and hardening the binder.
Inventors
- 👤 William J Mcdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:46
CPC Classifications
B; B24; B24D; B24D13/00; B24D13/02; B24D13/04; B24D11/00; B24D13/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
56 words
An elongate flap-bearing strip comprised of a tough, flexible, elongate support sheet having firmly adherently bonded to and covering one major surface thereof a plurality of closely spaced, parallel, transversely oriented narrow islands of strong room temperature-solid binder each of which is firmly adherently bonded to and holds in erect position, a like oriented abrasive flap.
Claim 2
Dependent Claim
56 words
An elongate flap-bearing strip comprised of a tough, flexible, elongate support sheet having firmly adherently bonded to and covering one major surface thereof a plurality of closely spaced, parallel, transversely oriented narrow islands of strong room temperature-solid binder each of which is firmly adherently bonded to and holds in erect position, a like oriented abrasive flap.
Claim 3
Dependent Claim
16 words
The article of claim 1 wherein said sheet of tough flexible material is a fibrous sheet.
Claim 4
Dependent Claim
10 words
The article of claim 1 wherein said binder is polyurethane.
Claim 5
Dependent Claim
36 words
The article of claim 1 wherein said abrasive flap comprises a sheet having abrasive covering one face thereof and said flaps are arranged on said abrasive sheet with their abrasive covered faces facing in one direction.
Claim 6
Dependent Claim
35 words
The article of claim 1 wherein said abrasive flap comprises an open porous sheet of randomly oriented polymeric fibers having adjacent fibers bonded together and abrasive particles held therein by a coating of adhesive material.
Claim 7
Dependent Claim
44 words
An abrasive flap wheel including a length of the abrasive article of claim 1 having its ends joined to form an annulus with the flaps radially arranged therefrom, and a tough stretch-resistant support member firmly adhesively bonded to the inner surface of said annulus.
Claim 8
Dependent Claim
21 words
The abrasive flap wheel of claim 6 wherein said tough stretch-resistant support member is fabric comprised of glass and polyester fibers.
Claim 9
Dependent Claim
15 words
The abrasive flap wheel of claim 6 wherein said support member is a rigid tube.
Claim 10
Dependent Claim
34 words
The abrasive flap wheel of claim 6 wherein each of said flaps has a plurality of parallel slits starting at the outer end thereof and perpendicular to the axis of rotation of said wheel.
Claim 11
Dependent Claim
30 words
A flap wheel including an elongate core having firmly attached to the outer surface thereof a spirally wound cover comprised of a segment of the abrasive article of claim 1.
Claim 12
Independent Claim
110 words
A method of fabricating an article having a tough flexible elongate sheet having firmly adherently bonded over one major surface thereof a plurality of closely spaced parallel transversely oriented narrow islands of room-temperature solid binder each of which hold in erect position a like oriented abrasive flap, comprising the steps of: applying a continuous layer at least one-sixteenth inch in thickness of liquid hardenable binder upon said one major surface of said sheet; placing erectly supported closely spaced parallel abrasive flaps into contact with said liquid binder layer; isolating elongate portions of said binder layer to form elongate islands of liquid binder corresponding to said flaps; and hardening said resin.
Claim 13
Independent Claim
110 words
A method of fabricating an article having a tough flexible elongate sheet having firmly adherently bonded over one major surface thereof a plurality of closely spaced parallel transversely oriented narrow islands of room-temperature solid binder each of which hold in erect position a like oriented abrasive flap, comprising the steps of: applying a continuous layer at least one-sixteenth inch in thickness of liquid hardenable binder upon said one major surface of said sheet; placing erectly supported closely spaced parallel abrasive flaps into contact with said liquid binder layer; isolating elongate portions of said binder layer to form elongate islands of liquid binder corresponding to said flaps; and hardening said resin.
Claim 14
Dependent Claim
17 words
The method of claim 11 wherein said abrasive flaps have a release coating over one major surface.
Claim 15
Dependent Claim
21 words
The method of claim 11 wherein said portions of said binder layer are isolated by non-abrasive sheets having releaseable major surfaces.
References Cited (Backward Citations)
US2948090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |