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US4038047A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of making a flexible resilient abrasive

Assignee: Saint Gobain Abrasives Inc
•
Filing: 1971-08-13
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Granted: 1977-07-26
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Expires: 1991-08-13
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Abstract

Abstract A resilient, controlled-density, porous, abrasive material is manufactured having a backing member which in the preferred embodiment is a foam layer of a plurality of discrete resilient particles of varying degrees of compressibility. The backing member is provided from a larger body of foam material reconstituted from particulate foam. The surface of the backing member, on which is coated an abrasive grain - binder adhesive slurry, is subjected, prior to the coating of the slurry on the particulate foam layer, to the action of a plurality of rapidly moving small abrasive particles whereby a relatively non-compressive shearing of the foam surface is effected to condition it for reception of abrasive grains and associated binder adhesive and to produce a uniform thickness of the porous abrasive grain support.

Inventors

  • 👤 George L. Haywood

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 14:09
CPC Classifications
B; B24; B24D; B24D11/00; B24D11/001; B24D11/005; B29; B29C; B29C44/00; B29C44/34; B29C44/56; B29C44/5627; B29C44/5654; Y; Y10; Y10S; Y10S264/00; Y10S264/07; Y10S264/911; Y10S264/916

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 102 words
In a method of manufacturing a resilient, controlled-density, porous, abrasive material comprising a foam backing member, said method comprising applying to a surface of the foam backing member a composition comprising abrasive grain and binder therefor, the improvement comprising: a. forming a self-sustaining cylinder of closely-packed small, resilient foam particles bound one to the other by an adhesive binder; b. peeling a thin continuous sheet from the cylinder by a compressive shearing action; and c. before application of the abrasive grain-bonding adhesive, subjecting the surface of the foam backing member to a non-compressive shearing action whereby to produce a smooth, porous, surface.
Claim 2
Dependent Claim 102 words
In a method of manufacturing a resilient, controlled-density, porous, abrasive material comprising a foam backing member, said method comprising applying to a surface of the foam backing member a composition comprising abrasive grain and binder therefor, the improvement comprising: a. forming a self-sustaining cylinder of closely-packed small, resilient foam particles bound one to the other by an adhesive binder; b. peeling a thin continuous sheet from the cylinder by a compressive shearing action; and c. before application of the abrasive grain-bonding adhesive, subjecting the surface of the foam backing member to a non-compressive shearing action whereby to produce a smooth, porous, surface.
Claim 3
Dependent Claim 30 words
In a method of manufacture as set forth in claim 1, the method further comprising laminating a supporting backing material to the peeled foam sheet prior to the shearing action.
Claim 4
Dependent Claim 18 words
In a method of manufacture as set forth in claim 2, said resilient foam particles comprising polyurethane foam.
Claim 5
Dependent Claim 23 words
In a method of manufacture as set forth in claim 3, said abrasive grain being in the range of grits 50 to 240.
Claim 6
Dependent Claim 20 words
In a method of manufacture as set forth in claim 4, said small abrasive particles being silicon carbide abrasive grain.

References Cited (Backward Citations)

US2536183A Cited
US2780533A Cited
US3281513A Cited
US3281259A Cited
US3401490A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-07-25 1981-01-24 1981-07-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-07-25 1985-01-24 1985-07-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-07-25 1989-01-24 1989-07-26 $7700.00 Window Closed / Lapsed

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