ABRASIVE ARTICLE AND METHOD OF FABRICATION
First Claim
1. 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.
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Accused Products
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.
25 Citations
13 Claims
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1. 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.
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2. The article of claim 1 wherein said sheet of tough flexible material is a fibrous sheet.
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3. The article of claim 1 wherein said binder is polyurethane.
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4. 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.
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5. 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.
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6. 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.
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7. The abrasive flap wheel of claim 6 wherein said tough stretch-resistant support member is fabric comprised of glass and polyester fibers.
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8. The abrasive flap wheel of claim 6 wherein said support member is a rigid tube.
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9. 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.
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10. 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.
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11. 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.
- applying a continuous layer at least one-sixteenth inch in thickness of liquid hardenable binder upon said one major surface of said sheet;
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12. The method of claim 11 wherein said abrasive flaps have a release coating over one major surface.
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13. The method of claim 11 wherein said portions of said binder layer are isolated by non-abrasive sheets having releaseable major surfaces.
Specification