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Publication numberUS3860400 A
Publication typeGrant
Publication dateJan 14, 1975
Filing dateJul 17, 1972
Priority dateJul 27, 1971
Also published asCA962065A1, DE2235503A1, DE2235503C2
Publication numberUS 3860400 A, US 3860400A, US-A-3860400, US3860400 A, US3860400A
InventorsProwse Derek Henry George, Prowse Stephen Derek
Original AssigneeProwse Co Ltd D H
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Flexible abrasive coverings
US 3860400 A
Abstract
Abrasive articles and methods of making same wherein a carrying sheet preferably in the form of a wire mesh or like perforated structure is embedded in a backing member in a manner whereby only spaced portions of the sheet are exposed on one surface of the backing member and abrasive particles are secured only to these exposed portions of the sheet.
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Description  (OCR text may contain errors)

United States, Patent Prowse et al.

[ Jan. 14, 1975.

FLEXIBLE ABRASIVE COVERINGS Inventors: Derek Henry George Prowse;

Stephen Derek Prowse, both of Batts Hill, Redhill, Surrey, England Assignee: D. H. Prowse and Company Limited,

Surrey, England Filed: July 17, 1972 Appl. No; 272,116

Foreign Application Priority Data References Cited UNITED STATES PATENTS 7/1905 (iorton 5l/DlG. 19

Gorton 5l/DlG. l9 Benner et al. 51/307 Taylor 51/299 Sternfield et al. Sl/295 Robie 51/296 Anthony et al. 51/293 Hoover 51/295 Hurst 5l/293 Mattia et al. 5l/309 Primary ExaminerDonald J. Arnold ABSTRACT Abrasive articles and methods of making same wherein a carrying sheet preferably in the form of a wire mesh or like perforated structure is embedded in a backing member in a manner whereby only spaced portions of the sheet are exposed on one surface of the backing member and abrasive particles are secured only to these exposed portions of the sheet.

18 Claims, 3 Drawing Figures FLEXIBLE ABRASIVE COVERINGS This invention relates to abrasive articles and finds application in diverse fields such as grinding wheels or discs, flexible abrasive coverings or sheets or endless abrasive belts.

One object of the invention is to provide a method and means whereby abrasive particles such as diamond particles can be plated onto a sheet of flexible material for example a sheet of flexible mesh in such a manner that the flexibility of the sheet is substantially unimpaired and so as to produce a flexible abrasive article which can be used to advantage in the surface treatment of irregular surfaces for example in grinding irregular stonework.

The invention provides an abrasive article comprising abrasive carrying material combined with nonabrasive carrying material in a manner whereby spaced portions only of the carrying material are exposed from the non-carrying material on one surface of the article and abrasive particles secured only to said exposed portions of the carrying material.

The invention also provides a method of manufacturing an abrasive article comprising combining abrasive carrying material with non-abrasive carrying material exposing spaced portions only of the carrying material from the non-carrying material on one surface of the article and securing abrasive particles only to said exposed portions of the carrying material.

By securing the abrasive particles only to the exposed portions of the carrying material, control of the distribution of abrasive particles over an area can be obtained. Further, where the carrying material is a flexible mesh or perforated sheet, and the abrasive is in the form of diamond particles to be plated onto the mesh, by exposing only portions of the mesh on one surface of the backing member and plating the diamond particles to these portions only, the plating process does not substantially affect the flexibility of the mesh intersections, so that if a flexible backing member is used, a flexible sheet of diamond plated mesh can be obtained.

The abrasive carrying material which is preferably in sheet form having a discontinuous surface may be flat or bent for example the sheet may be formed into a tube or cylinder which is then combined with backing member material and abrasive to form either a solid cylindrical or a tubular abrasive article respectively. Dependent on the application required the abrasive carrying material may be metallic or non-metallic, flexible or rigid and may be perforated or imperforate, the latter having for example a pattern embossed thereon or being corrugated, to provide a discontinuous surface to facilitate exposure of portions only of the sheet on one face of the non-abrasive carrying material or backing member. Examples of suitable abrasive-carrying materials are metallic or non-metallic mesh or screen structures or perforated or expanded sheets.

The non-abrasive-carrying material may be flexible or non-flexible and may comprise a synthetic plastics or natural material such as rubber or latex. Where the abrasive particles are to be electroplated onto the carrying material, the non-earrying-or backing member material should be non-conducting. Examples of suitable materials for synthetic plastics backing members are polypropylene, acrylic butadiene styrene, styrene acrylic nitride, Delvin (aeetal resin compositions manufactured by DUPONT & CO.), nylon, Surlyn (polymeric resin compositions, ionomers based on ethylene manufactured by DUPONT & CO.), or fibre glass or other resin compositions.

Numerous techniques may be employed for combining the materials so that only portions of the carrying material are exposed on one surface of the noncarrying material. For example, a sheet of carrying material may be embedded in a backing member by extrusion or by pressing the sheet into the backing member, i.e. by vulcanization. The sheet may be coated or sprayed with backing member material or the sheet can be dipped into molten backing member material or simply adhered to the backing member with solvent or adhesive.

The abrasive particles may comprise diamond particles either natural or synthetic, cubic boron nitride, tungsten carbide, glass, sand or any other abrasive or combination thereof or the abrasive particles may comprise conglomerates of abrasive particles impregnated into a carrying medium. To attach the abrasive particles to the exposed portions only of the carrying material it is preferred, particularly in the case of a diamond abrasive which it is envisaged will be the most useful form of abrasive for articles according to the invention, to plate the particles tothe carrying material, by conventional electroplating techniques where a metal carrying sheet is used with a non-conductive backing member or for a non-metallic carrying sheet first by chemically depositing a metal onto the exposed sheet portions followed by an electroplating process for the abrasive particles.

The invention will now be described by way of example with reference to the accompanying drawings all of the Figures of which show cross-sections through different forms of abrasive particles.

FIG. 1 shows carrying material in the form of a sheet of wire mesh 1 embedded in non-carrying material in the form of a backing member 2 of say plastics material in such a manner that only regularly spaced peak portions 3 of the mesh at its intersections are exposed on the upper surface of the backing member. These exposed portions of the mesh are plated with abrasive particles 4. This form of the invention is useful for grinding wheels or as an abrasive covering or belt, if the backing member is flexible.

In the construction shown in FIG. 2, a raspsection perforated sheet 5 is embedded in a backing member 6 so that only those portions of the sheet around the perforations are exposed on the upper surface of the backing member and again, only these exposed portions are plated with abrasive particles 7, eg diamond particles.

FIG. 3 shows a tubular form of abrasive article, such as an abrasive roller or a tubular bead to be threaded for example onto a saw wire, and comprising a tubular backing member 8 with a tube of wire mesh 9 embedded therein so that only portions of the mesh at its intersections are exposed on the outer peripheral surface of the backing member. These exposed portions are again plated with abrasive particles 10. The mesh may be pressed into the backing member or the backing member may be extruded with the mesh.

EXAMPLE I A rigid grinding wheel was made from a body member of acrylic butadiene styrene (ABS) having an abrasive covering constructed in accordance with the invention. To this end, a sheet of mild steel mesh l/l6 inch thick with 14 apertures per linear inch and a wire diameter of 18 thousandth of an inch was embedded in a 1/16 inch thick backing member sheet also of ABS. The embedding process was performed in a press with a heated platen and was carried out until the mesh and backing member surfaces were substantially flush. Then, the backing member with the embedded mesh was adhered with solvent to the wheel body and the operative surface trimmed with a conventional grinding wheel to ensure exposure from the backing member only of spaced portions of the mesh at the mesh intersections. The wheel body, with an electrode attached to the mesh was then admitted to a conventional nickel electroplating bath containing diamond grit particles of 170/200 grit size and the grit particles were thus plated only onto the exposed portions of the mesh.

EXAMPLE II To obtain a flexible abrasive covering material, useful for example as a peripheral covering for a grinding wheel or as a covering for a flexible disc grinder, a metal mesh as outlined in Example I, was embedded in a Ill 6 inch backing sheet of a flexible plastics material in this case polypropylene by the same method used in Example I. The operative surface was again trimmed to ensure correct mesh exposure and the resultant covering material was then treated in an electroplating bath as indicated in Example I to plate diamond gint particles only to the exposed mesh portions. This flexible covering can then be combined with a compressible backing such as a rubber backing or a noncompressible metallic backing to form a grinding wheel.

It will be appreciated that use of the invention allows the distribution of abrasive particles over a required area to be accurately controlled by controlling the points of exposure of the carrying sheet from the backing member, by suitable choice of the sheet configuration and further, where non-abrasive areas are required on an abrasive surface, these can be obtained by conventional masking techniques during the plating process.

Further, whilst in the accompanying drawings, the exposed portions of the abrasive carrying material are, for the sake of clarity, shown as projecting slightly from the surface of the non-carrying material, this is not essential. The exposed portions of the carrying material can be flush with the surface of the non-carrying material or even depressed from said surface. Also, whilst the specification describes articles with abrasive particles on one surface only, it is within the scope of the invention to provide an article with exposed portions of 4. An article as claimed in claim 3 wherein said sheet is perforated.

5. An article as claimed in claim 4 wherein said sheet comprises a mesh structure.

6. An article as claimed in claim 5 wherein said exposed portions include intersecting portions of the mesh structure.

7. An article as claimed in claim 1 wherein said sheet consists of an electrically conducting material.

8. An article as claimed in claim 1 wherein the backing material is flexible.

9. An article as claimed in claim 1 wherein the backing material is non-electrically conducting.

10. An article as claimed in claim 9 wherein the supporting material is a synthetic resinous material.

1 1. An article as claimed in claim 1 wherein the abrasive particles include diamond particles.

12. An article as claimed in claim 1 wherein the abrasive particles are plated onto said exposed portions of the sheet.

13. A method of manufacturing an abrasive article comprising embedding a metallic sheet within a backing material so as to expose spaced portions only of the sheet on a surface of the backing material and bonding abrasive particles to said exposed portions of the sheet. 14. A method as claimed in claim 13 wherein the sheet is pressed into the backing material.

15. A method as claimed in claim 13 wherein the backing material is a synthetic resinous material and shaped by extrusion along with said sheet.

16. A method as claimed in claim 13 wherein the sheet is embedded in said backing material by applying the material in liquid or molten form to the sheet.

17. A method as claimed in claim 13 wherein said surface of the article is machined to expose said portions of the sheet.

18. A method as claimed in claim 14 wherein the abrasive particles are secured, to the sheet by a plating process.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US794495 *Apr 30, 1902Jul 11, 1905George GortonAbrading-surface.
US794496 *May 23, 1902Jul 11, 1905George GortonAbrading-sheet.
US2225193 *Sep 15, 1937Dec 17, 1940Carborundum CoAbrasive wheel
US2564217 *Oct 30, 1948Aug 14, 1951Carborundum CoAbrasive cutoff wheel
US2665528 *Jan 27, 1950Jan 12, 1954Block Myron WDisposable cleansing tissue
US2734812 *Sep 21, 1951Feb 14, 1956 robie
US2906612 *Aug 7, 1957Sep 29, 1959Skil CorpCutting apparatus and manufacture thereof
US2958593 *Jan 11, 1960Nov 1, 1960Minnesota Mining & MfgLow density open non-woven fibrous abrasive article
US3246430 *Apr 25, 1963Apr 19, 1966Rexall Drug ChemicalAbrasive articles and methods of making the same
US3517464 *Mar 19, 1968Jun 30, 1970Budd CoMethod of making abrasive tools by electro-deposition
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3921344 *May 14, 1973Nov 25, 1975American Optical CorpLens surfacing pads and method of making the same
US3964213 *Mar 17, 1975Jun 22, 1976Tobey Alton EAbrasive cleaning tool
US4047902 *Jun 24, 1976Sep 13, 1977Wiand Richard KMetal-plated abrasive product and method of manufacturing the product
US4078906 *Sep 29, 1976Mar 14, 1978Elgin Diamond Products Co., Inc.Method for making an abrading tool with discontinuous diamond abrading surfaces
US4162899 *Aug 15, 1977Jul 31, 1979Swiss Aluminium Ltd.Polishing foil or polishing plate
US4256467 *Dec 17, 1979Mar 17, 1981Ian GorsuchA flexible abrasive coated article and method of making it
US4826508 *Sep 10, 1987May 2, 1989Diabrasive International, Ltd.Flexible abrasive coated article and method of making it
US4908046 *Feb 14, 1989Mar 13, 1990Wiand Ronald CMultilayer abrading tool and process
US4916869 *Aug 1, 1988Apr 17, 1990L. R. Oliver & Company, Inc.Bonded abrasive grit structure
US4945686 *Mar 20, 1989Aug 7, 1990Wiand Ronald CMultilayer abrading tool having an irregular abrading surface and process
US5022895 *Oct 18, 1989Jun 11, 1991Wiand Ronald CMultilayer abrading tool and process
US5127197 *Apr 25, 1991Jul 7, 1992Brukvoort Wesley JAbrasive article and processes for producing it
US5131924 *Feb 2, 1990Jul 21, 1992Wiand Ronald CAbrasive sheet and method
US5133782 *Jan 26, 1990Jul 28, 1992Wiand Ronald CMultilayer abrading tool having an irregular abrading surface and process
US5203881 *Aug 29, 1991Apr 20, 1993Wiand Ronald CAbrasive sheet and method
US5251802 *Jun 12, 1992Oct 12, 1993Minnesota Mining And Manufacturing CompanyAbrasive article and processes for producing it
US5316812 *Dec 20, 1991May 31, 1994Minnesota Mining And Manufacturing CompanyCoated abrasive backing
US5318604 *Nov 18, 1992Jun 7, 1994Minnesota Mining And Manufacturing CompanyAbrasive articles incorporating abrasive elements comprising abrasive particles partially embedded in a metal binder
US5417726 *Feb 3, 1994May 23, 1995Minnesota Mining And Manufacturing CompanyCoated abrasive backing
US5573619 *Oct 29, 1993Nov 12, 1996Minnesota Mining And Manufacturing CompanyMethod of making a coated abrasive belt with an endless, seamless backing
US5578096 *Aug 10, 1995Nov 26, 1996Minnesota Mining And Manufacturing CompanyMethod for making a spliceless coated abrasive belt and the product thereof
US5580634 *Sep 26, 1994Dec 3, 1996Minnesota Mining And Manufacturing CompanyCoated abrasive backing
US5584897 *Dec 29, 1995Dec 17, 1996Minnesota Mining And Manufacturing CompanyMethod for making an endless coated abrasive article
US5609706 *May 8, 1995Mar 11, 1997Minnesota Mining And Manufacturing CompanyMethod of preparation of a coated abrasive belt with an endless, seamless backing
US5620489 *Jan 31, 1996Apr 15, 1997Ultimate Abrasive Systems, L.L.C.Method for making powder preform and abrasive articles made thereform
US5681612 *Feb 20, 1996Oct 28, 1997Minnesota Mining And Manufacturing CompanyCoated abrasives and methods of preparation
US5725421 *Feb 27, 1996Mar 10, 1998Minnesota Mining And Manufacturing CompanyApparatus for rotative abrading applications
US5817204 *Oct 9, 1996Oct 6, 1998Ultimate Abrasive Systems, L.L.C.Method for making patterned abrasive material
US5830248 *Nov 21, 1996Nov 3, 1998Minnesota Mining & Manufacturing CompanyMethod for making a spliceless coated abrasive belt
US5849646 *Jul 7, 1997Dec 15, 1998Minnesota Mining & Manufacturing CompanyCoated abrasive backing
US5919084 *Jun 25, 1997Jul 6, 1999Diamond Machining Technology, Inc.Two-sided abrasive tool and method of assembling same
US5924917 *Oct 24, 1997Jul 20, 1999Minnesota Mining And Manufacturing CompanyCoated abrasives and methods of preparation
US5976001 *Apr 24, 1997Nov 2, 1999Diamond Machining Technology, Inc.Interrupted cut abrasive tool
US5980678 *May 11, 1998Nov 9, 1999Ultimate Abrasive Systems, L.L.C.Patterned abrasive material and method
US6066188 *Jul 16, 1998May 23, 2000Minnesota Mining And Manufacturing CompanyCoated abrasive belt with an endless seamless backing and method of preparation
US6190246 *Dec 23, 1996Feb 20, 2001Brian H. ParrottSanding devices and the like for removing materials
US6261167Dec 15, 1998Jul 17, 2001Diamond Machining Technology, Inc.Two-sided abrasive tool and method of assembling same
US6402603Dec 16, 1999Jun 11, 2002Diamond Machining Technology, Inc.Two-sided abrasive tool
US6406576Oct 17, 1996Jun 18, 20023M Innovative Properties CompanyMethod of making coated abrasive belt with an endless, seamless backing
US6406577Oct 17, 1996Jun 18, 20023M Innovative Properties CompanyMethod of making abrasive belt with an endless, seamless backing
US6528141Aug 13, 1999Mar 4, 2003Diamond Machining Technology, Inc.Support structure and method of assembling same
US6672952Dec 23, 1998Jan 6, 20043M Innovative Properties CompanyTearable abrasive article
US7094140Jan 25, 2005Aug 22, 2006Onfloor Technologies, L.L.C.Abrasive sanding surface
US8357217 *May 30, 2011Jan 22, 2013Chung-Shan Institute Of Science And TechnologyMethod and apparatus for making a fixed abrasive wire
USB359825 *May 14, 1973Jan 28, 1975 Title not available
USRE35812 *Mar 4, 1992Jun 2, 1998Oliver; Lloyd R.Bonded abrasive grit structure
EP0439956A2 *Dec 24, 1990Aug 7, 1991Ronald Carlysle WiandAbrasive sheet and method of manufacturing
WO1991006398A1 *Nov 7, 1990May 16, 1991Barman Jensen RolfGrinding belt
WO1992012827A1 *Jan 24, 1992Aug 6, 1992Carbide Tools International ASanding belt
WO1997038813A1 *Apr 18, 1997Oct 23, 1997Antler Steven MSanding accessory for an oscillating sander
Classifications
U.S. Classification51/295, 451/538, 51/309, 51/298
International ClassificationB24D5/06, B24D5/00, B24D7/06, B24D11/00, B24D7/00
Cooperative ClassificationB24D11/00, B24D7/06, B24D5/06
European ClassificationB24D11/00, B24D7/06, B24D5/06