US3333372A - Abrasive belt - Google Patents

Abrasive belt Download PDF

Info

Publication number
US3333372A
US3333372A US415699A US41569964A US3333372A US 3333372 A US3333372 A US 3333372A US 415699 A US415699 A US 415699A US 41569964 A US41569964 A US 41569964A US 3333372 A US3333372 A US 3333372A
Authority
US
United States
Prior art keywords
flexible
film
abrasive
belt
end portions
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US415699A
Inventor
Henry L Gianatasio
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PRES OU ABRASIVES Inc
PRES-OU ABRASIVES Inc
Original Assignee
PRES OU ABRASIVES Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PRES OU ABRASIVES Inc filed Critical PRES OU ABRASIVES Inc
Priority to US415699A priority Critical patent/US3333372A/en
Application granted granted Critical
Publication of US3333372A publication Critical patent/US3333372A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24DTOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D11/00Constructional features of flexible abrasive materials; Special features in the manufacture of such materials

Definitions

  • the invention relates to an endless abrasive two-ply belt, the outer surface of the outer ply or base sheet has abrasive particles adhesively secured thereto.
  • This base sheet has a joint with abutting end portions cut at an angle of about 45 degrees relative to the side edge, the inner ply is adhesively bonded to the inner surface of the outer ply and comprises a flexible reinforcing film composed of material selected from the group of film-forming material consisting of polyethylene terephthalate and vulcanized fiber.
  • This film has a fused joint spaced from the joint of the first ply and also traversing the belt at an acute angle to the edge thereof.
  • This invention relates to an abrasive belt and, more particularly, to an abrasive belt which is adapted for use with belt sanders, and like tools.
  • Endless abrasive belts for use with belt sanders and like tools have been known heretofore but these have been subject to a number of problems and difficulties in use.
  • one problem which has been involved in the use of such endless abrasive belts has been the fact that the joint uniting the end portions of the abrasive coated flexible base material has commonly created a raised area over the surface of the joint with the result that such joints tend to wear out at the end portions of the abrasive coated flexible material and pull away from each other under the stresses and strains to which such endless abrasive belts are subjected in use.
  • an object of the present invention is to provide a new and improved endless abrasive belt, for use in belt sanders, and the like, which is free from the objectionable features of the prior art devices including the difficulties experienced in the areas where the end portions of the belt are joined together and other problems and difliculties involved in the use thereof.
  • Another object of the present invention is to provide a new and improved endless abrasive belt in which the thickness of the belt at the seam or joint between the end portions thereof does not differ substantially from the thickness of the belt throughout the body thereof.
  • FIG. 1 is a perspective view of an endless abrasive belt embodying the present invention
  • FIG. 2 is a fragmentary enlarged sectional view on line 22 in FIG. 1;
  • FIG. 3 is an enlarged fragmentary sectional view on line 33 in FIG. 1;
  • FIG. 4 is a top exploded plan view of the component elements of the new endless abrasive belt as they appear prior to the time they are laminated together.
  • a preferred embodiment of the present invention is illustrated in the drawing wherein it is generally indicated at 10, and comprises a base sheet of flexible material such as paper, cloth fabric of suitable quality, or the like, sized and cut to suitable dimensions depending upon the size, etc., of the belt sander, or the tool, with which it is to be used, and other factors.
  • a base sheet of flexible material such as paper, cloth fabric of suitable quality, or the like, sized and cut to suitable dimensions depending upon the size, etc., of the belt sander, or the tool, with which it is to be used, and other factors.
  • a layer 13 of finely divided abrasive particles or granules is adhesively secured to the outer surface of the flexible base sheet 12, and a layer 14 of flexible strengthening material is provided on the inner surface of the flexible abrasive sheet 12, the layer 14 of flexible strengthening material being adhesively secured to the inner surface of the flexible base sheet 12 by means of a suitable intermediate adhesive film 1
  • the layer 14 of flexible strengthening material may be made of suitable selected material such, for example, as a thin film of polyester resin or, alternatively, it may be made of vulcanized fabric in which vulcanized material latex rubber, or suitable synthetic resinous copolymer material, may be incorporated to impart adequate strength thereto.
  • the layer 14 of flexible strengthening material may also be made from various materials including synthetic rubbery copolymers,
  • the rubbery adhesive material may be incorporated in a suitable solvent system such, for example, as methyl ethyl ketone (MEK) so as to provide a suitable bond with the adhesive layer or film 15.
  • MEK methyl ethyl ketone
  • the flexible strengthening layer or film 14 is preferably made of a polyethylene terephthalate film or so-called MYLAR (a Du Pont trademark) film because, unlike polyethylene, this material is tough and, being somewhat polar, can be adhered to other materials with relative ease. In addition, it is not brittle, as are certain other film-forming materials, including some acrylic films, styrenes, and like synthetic resinous materials.
  • MYLAR a Du Pont trademark
  • the end portions 18 thereof may be joined or laminated together by heat fusion or heat sealing.
  • end portions 17 of the abrasive coated base or backing sheet 12 are cut preferably at an acute angle of about 45 (FIG. 4) relative to the parallel side edges there-of, and the end portions 18 of the layer or film 14 of flexible strengthening material are similarly preferably cut at an acute angle relative to the parallel side edges thereof (FIG. 4).
  • the thus angularly cut end portions 17 of the abrasive coated sheet 12-13 are placed in abutting relationship to form the joint or seam 19 (FIG. 1).
  • the non-abrasive surface of the flexible abrasive coated base or backing sheet 12 is then coated with the adhesive coating or film 15, which may be in the form of synthetic latex, or like material, whereupon the end portions 18 of the layer or film 14 of flexible strengthening material, which may be made of Mylar film, or of vulcanized fiber, may be cut at an acute angle relative to the side edges thereof, and the thus cut flexible reinforcing film 14 is then arranged over the adhesive layer or film 15, and secured thereto with the acute angularly cut end portions 18 of the layer or film 14 of flexible strengthening material abutted together, as at 16,
  • the end portions 18 of the flexible sheet or film 14 may then be heat-fused or heat-sealed together to form the integral joint or bond 16.
  • an endless abrasive belt is provided which is strong and durable and free from any lumps or raised portions at the butt joint 19 between the end portions 17 of the flexible abrasive coated sheet 12-13, and at the butt joint 16 between the end portions 18 of the flexible strengthening sheet or film 14, and a strong and durable endless abrasive belt 10 is provided which well resists the stresses and strains to which it is subjected in use on a belt sander, or other tool.
  • An endless abrasive belt comprising (a) a flexible base sheet including an inner surface and an outer surface,
  • said flexible reinforcing film being composed of a material selected from the group of film-forming materials consisting of polyethylene terephthalate and vulcanized fiber,
  • said flexible reinforcing film having a fused joint spaced longitudinally of said belt from said first joint and with abutting end portions cut at acute angles relative to the side edges thereof.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Description

United States Patent 3,333,372 ABRASIVE BELT Henry L. Gianatasio, Oak Park, Ill., assignor to Pres-0n Abrasives, Inc., Addison, Ill., a corporation of Illinois Filed Dec. 3, 1964, Ser. No. 415,699 1 Claim. (Cl. 51--399) ABSTRACT OF THE DISCLOSURE More particularly, the invention relates to an endless abrasive two-ply belt, the outer surface of the outer ply or base sheet has abrasive particles adhesively secured thereto. This base sheet has a joint with abutting end portions cut at an angle of about 45 degrees relative to the side edge, the inner ply is adhesively bonded to the inner surface of the outer ply and comprises a flexible reinforcing film composed of material selected from the group of film-forming material consisting of polyethylene terephthalate and vulcanized fiber. This film has a fused joint spaced from the joint of the first ply and also traversing the belt at an acute angle to the edge thereof.
This invention relates to an abrasive belt and, more particularly, to an abrasive belt which is adapted for use with belt sanders, and like tools.
Endless abrasive belts for use with belt sanders and like tools have been known heretofore but these have been subject to a number of problems and difficulties in use. Thus, one problem which has been involved in the use of such endless abrasive belts has been the fact that the joint uniting the end portions of the abrasive coated flexible base material has commonly created a raised area over the surface of the joint with the result that such joints tend to wear out at the end portions of the abrasive coated flexible material and pull away from each other under the stresses and strains to which such endless abrasive belts are subjected in use.
Accordingly, an object of the present invention is to provide a new and improved endless abrasive belt, for use in belt sanders, and the like, which is free from the objectionable features of the prior art devices including the difficulties experienced in the areas where the end portions of the belt are joined together and other problems and difliculties involved in the use thereof.
Another object of the present invention is to provide a new and improved endless abrasive belt in which the thickness of the belt at the seam or joint between the end portions thereof does not differ substantially from the thickness of the belt throughout the body thereof.
Other and further objects of the present invention will be apparent from the following description and claims and are illustrated in the accompanying drawings, which, by way of illustration, show a preferred embodiment of the present invention and the principles thereof and what I now consider to be the best mode in which I have contemplated applying these principles. Other embodiments of the invention embodying the same or equivalent principles may be used and structural changes may be made as desired by those skilled in the art without departing from the present invention.
In the drawings:
FIG. 1 is a perspective view of an endless abrasive belt embodying the present invention;
FIG. 2 is a fragmentary enlarged sectional view on line 22 in FIG. 1;
FIG. 3 is an enlarged fragmentary sectional view on line 33 in FIG. 1; and
FIG. 4 is a top exploded plan view of the component elements of the new endless abrasive belt as they appear prior to the time they are laminated together.
3,333,372 Patented Aug. 1, 1967 A preferred embodiment of the present invention is illustrated in the drawing wherein it is generally indicated at 10, and comprises a base sheet of flexible material such as paper, cloth fabric of suitable quality, or the like, sized and cut to suitable dimensions depending upon the size, etc., of the belt sander, or the tool, with which it is to be used, and other factors.
A layer 13 of finely divided abrasive particles or granules is adhesively secured to the outer surface of the flexible base sheet 12, and a layer 14 of flexible strengthening material is provided on the inner surface of the flexible abrasive sheet 12, the layer 14 of flexible strengthening material being adhesively secured to the inner surface of the flexible base sheet 12 by means of a suitable intermediate adhesive film 1 The layer 14 of flexible strengthening material may be made of suitable selected material such, for example, as a thin film of polyester resin or, alternatively, it may be made of vulcanized fabric in which vulcanized material latex rubber, or suitable synthetic resinous copolymer material, may be incorporated to impart adequate strength thereto.
In the practice of the present invention the layer 14 of flexible strengthening material may also be made from various materials including synthetic rubbery copolymers,
such as a butadiene-styrene synthetic rubber material,
which may be reinforced with additional or tougher resins, and the rubbery adhesive material may be incorporated in a suitable solvent system such, for example, as methyl ethyl ketone (MEK) so as to provide a suitable bond with the adhesive layer or film 15.
However, it has been found in the practice of the present invention that the flexible strengthening layer or film 14 is preferably made of a polyethylene terephthalate film or so-called MYLAR (a Du Pont trademark) film because, unlike polyethylene, this material is tough and, being somewhat polar, can be adhered to other materials with relative ease. In addition, it is not brittle, as are certain other film-forming materials, including some acrylic films, styrenes, and like synthetic resinous materials.
Moreover, the polyethylene terephthalate (Mylar) film, being thermoplastic the end portions 18 thereof may be joined or laminated together by heat fusion or heat sealing.
In the manufacture of the new endless abrasive belt 10 it is necessary, however, to select an adhesive 15 which is not only compatible with the layer 14 of flexible strengthening material but which also achieves a good bond with the flexible abrasive base layer or backing sheet 12-13.
In the practice of the present invention the end portions 17 of the abrasive coated base or backing sheet 12 are cut preferably at an acute angle of about 45 (FIG. 4) relative to the parallel side edges there-of, and the end portions 18 of the layer or film 14 of flexible strengthening material are similarly preferably cut at an acute angle relative to the parallel side edges thereof (FIG. 4). The thus angularly cut end portions 17 of the abrasive coated sheet 12-13 are placed in abutting relationship to form the joint or seam 19 (FIG. 1). The non-abrasive surface of the flexible abrasive coated base or backing sheet 12 is then coated with the adhesive coating or film 15, which may be in the form of synthetic latex, or like material, whereupon the end portions 18 of the layer or film 14 of flexible strengthening material, which may be made of Mylar film, or of vulcanized fiber, may be cut at an acute angle relative to the side edges thereof, and the thus cut flexible reinforcing film 14 is then arranged over the adhesive layer or film 15, and secured thereto with the acute angularly cut end portions 18 of the layer or film 14 of flexible strengthening material abutted together, as at 16,
as shown in FIG. 1, and preferably at a joint spaced from the joint 19 provided by the acute angularly cut end portions 17 of the flexible abrasive coated base or backing sheet 12-13 (FIG. 1).
The end portions 18 of the flexible sheet or film 14 may then be heat-fused or heat-sealed together to form the integral joint or bond 16. In this manner an endless abrasive belt is provided which is strong and durable and free from any lumps or raised portions at the butt joint 19 between the end portions 17 of the flexible abrasive coated sheet 12-13, and at the butt joint 16 between the end portions 18 of the flexible strengthening sheet or film 14, and a strong and durable endless abrasive belt 10 is provided which well resists the stresses and strains to which it is subjected in use on a belt sander, or other tool.
It will thus be seen from the foregoing description, considered in conjunction with the accompanying drawing, that the present invention provides a new and improved endless abrasive belt and that the invention thus has thedesirable advantages and characteristics and accomplishes its intended objects including those hereinbefore pointed out and others which are inherent in the invention.
I claim:
An endless abrasive belt comprising (a) a flexible base sheet including an inner surface and an outer surface,
(b) a layer of finely divided abrasive particles adhesively secured to the outer surface,
() the said abrasively coated flexible base sheet having end portions abutting each other to form a closed, continuous loop,
(d) a film of flexible adhesive material on the said inner surface of the said flexible abrasive coated sheet,
(e) a reinforcing film of tough, flexible reinforcing material bonded to the said adhesive film on the inner surface of the latter,
(f) said flexible reinforcing film being composed of a material selected from the group of film-forming materials consisting of polyethylene terephthalate and vulcanized fiber,
(g) said flexible abrasive coated base sheet having a joint with abutting end portions cut at an angle of about relative to the side edges of the said abrasive-coated flexible base sheet, and
(h) said flexible reinforcing film having a fused joint spaced longitudinally of said belt from said first joint and with abutting end portions cut at acute angles relative to the side edges thereof.
References Cited UNITED STATES PATENTS 2,186,001 1/1940 Bartling 51-407 2,391,731 12/1945 Miller 5l399 2,637,956 5/1953 Nuessle 5l407 2,794,726 6/1957 Riedesel 51-399 X 3,186,135 6/1965 Crean 5l394 FOREIGN PATENTS 417,177 9/1934 Great Britain.
ROBERT C. RIORDON, Primary Examiner.
D. G. KELLY, Assistant Examiner.
US415699A 1964-12-03 1964-12-03 Abrasive belt Expired - Lifetime US3333372A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US415699A US3333372A (en) 1964-12-03 1964-12-03 Abrasive belt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US415699A US3333372A (en) 1964-12-03 1964-12-03 Abrasive belt

Publications (1)

Publication Number Publication Date
US3333372A true US3333372A (en) 1967-08-01

Family

ID=23646811

Family Applications (1)

Application Number Title Priority Date Filing Date
US415699A Expired - Lifetime US3333372A (en) 1964-12-03 1964-12-03 Abrasive belt

Country Status (1)

Country Link
US (1) US3333372A (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4215516A (en) * 1979-04-18 1980-08-05 Sheldahl, Inc. Unidirectional tape
WO1986002306A1 (en) * 1984-10-09 1986-04-24 Minnesota Mining And Manufacturing Company Coated abrasive sheet material with improved backing
EP0219301A2 (en) * 1985-10-08 1987-04-22 Industrial Metal Products Corporation Improved microfinishing apparatus and method
US5341609A (en) * 1992-01-28 1994-08-30 Minnesota Mining And Manufacturing Company Abrasive belts and their manufacture
US5529590A (en) * 1993-05-20 1996-06-25 Minnesota Mining And Manufacturing Company Process for the manufacture of endless coated abrasive articles
US5573619A (en) * 1991-12-20 1996-11-12 Minnesota Mining And Manufacturing Company Method of making a coated abrasive belt with an endless, seamless backing
US5578096A (en) * 1995-08-10 1996-11-26 Minnesota Mining And Manufacturing Company Method for making a spliceless coated abrasive belt and the product thereof
US5584897A (en) * 1994-02-22 1996-12-17 Minnesota Mining And Manufacturing Company Method for making an endless coated abrasive article
US5595804A (en) * 1994-08-22 1997-01-21 Minnesota Mining And Manufacturing Company Splice means, a method of splicing an abrasive article with same and the spliced abrasive article formed thereby
US5681612A (en) * 1993-06-17 1997-10-28 Minnesota Mining And Manufacturing Company Coated abrasives and methods of preparation
US5951383A (en) * 1995-12-05 1999-09-14 Gerd Eisenblaetter Gmbh Grinding and polishing belt
US6406577B1 (en) * 1991-12-20 2002-06-18 3M Innovative Properties Company Method of making abrasive belt with an endless, seamless backing
US6406576B1 (en) 1991-12-20 2002-06-18 3M Innovative Properties Company Method of making coated abrasive belt with an endless, seamless backing
EP1277546A1 (en) * 2001-07-20 2003-01-22 sia Abrasives Industries AG Abrasive belt with a backing made of vulcanized fibers
CN101941187A (en) * 2010-08-13 2011-01-12 厦门致力金刚石工具有限公司 Diamond abrasive band

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB417177A (en) * 1932-12-22 1934-09-24 Minnesota Mining & Mfg Improvements in or relating to flexible abrasive articles, sandpaper or the like, and processes for making same
US2186001A (en) * 1930-01-20 1940-01-09 Minnesota Mining & Mfg Flexible abrasive sheet material
US2391731A (en) * 1943-05-17 1945-12-25 Minnesota Mining & Mfg Spliced abrasive belt, band, and the like
US2637956A (en) * 1952-03-28 1953-05-12 Minnesota Mining & Mfg Coated abrasive belt
US2794726A (en) * 1949-11-19 1957-06-04 Minnesota Mining & Mfg Endless abrasive article
US3186135A (en) * 1962-04-04 1965-06-01 Carborundum Co Abrasive disc

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2186001A (en) * 1930-01-20 1940-01-09 Minnesota Mining & Mfg Flexible abrasive sheet material
GB417177A (en) * 1932-12-22 1934-09-24 Minnesota Mining & Mfg Improvements in or relating to flexible abrasive articles, sandpaper or the like, and processes for making same
US2391731A (en) * 1943-05-17 1945-12-25 Minnesota Mining & Mfg Spliced abrasive belt, band, and the like
US2794726A (en) * 1949-11-19 1957-06-04 Minnesota Mining & Mfg Endless abrasive article
US2637956A (en) * 1952-03-28 1953-05-12 Minnesota Mining & Mfg Coated abrasive belt
US3186135A (en) * 1962-04-04 1965-06-01 Carborundum Co Abrasive disc

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4215516A (en) * 1979-04-18 1980-08-05 Sheldahl, Inc. Unidirectional tape
WO1986002306A1 (en) * 1984-10-09 1986-04-24 Minnesota Mining And Manufacturing Company Coated abrasive sheet material with improved backing
EP0219301A2 (en) * 1985-10-08 1987-04-22 Industrial Metal Products Corporation Improved microfinishing apparatus and method
EP0219301A3 (en) * 1985-10-08 1988-12-21 Industrial Metal Products Corporation Improved microfinishing apparatus and method
US5470362A (en) * 1991-01-30 1995-11-28 Minnesota Mining And Manufacturing Company Method for making coated abrasive belts
US5573619A (en) * 1991-12-20 1996-11-12 Minnesota Mining And Manufacturing Company Method of making a coated abrasive belt with an endless, seamless backing
US6406576B1 (en) 1991-12-20 2002-06-18 3M Innovative Properties Company Method of making coated abrasive belt with an endless, seamless backing
US6406577B1 (en) * 1991-12-20 2002-06-18 3M Innovative Properties Company Method of making abrasive belt with an endless, seamless backing
US6066188A (en) * 1991-12-20 2000-05-23 Minnesota Mining And Manufacturing Company Coated abrasive belt with an endless seamless backing and method of preparation
US5609706A (en) * 1991-12-20 1997-03-11 Minnesota Mining And Manufacturing Company Method of preparation of a coated abrasive belt with an endless, seamless backing
US5341609A (en) * 1992-01-28 1994-08-30 Minnesota Mining And Manufacturing Company Abrasive belts and their manufacture
US5529590A (en) * 1993-05-20 1996-06-25 Minnesota Mining And Manufacturing Company Process for the manufacture of endless coated abrasive articles
US5924917A (en) * 1993-06-17 1999-07-20 Minnesota Mining And Manufacturing Company Coated abrasives and methods of preparation
US5681612A (en) * 1993-06-17 1997-10-28 Minnesota Mining And Manufacturing Company Coated abrasives and methods of preparation
US5584897A (en) * 1994-02-22 1996-12-17 Minnesota Mining And Manufacturing Company Method for making an endless coated abrasive article
US5840141A (en) * 1994-08-22 1998-11-24 Minnesota Mining And Manufacturing Company Splice means, a method of splicing an abrasive article with same and the spliced abrasive article formed thereby
US5595804A (en) * 1994-08-22 1997-01-21 Minnesota Mining And Manufacturing Company Splice means, a method of splicing an abrasive article with same and the spliced abrasive article formed thereby
US5830248A (en) * 1995-08-10 1998-11-03 Minnesota Mining & Manufacturing Company Method for making a spliceless coated abrasive belt
US5578096A (en) * 1995-08-10 1996-11-26 Minnesota Mining And Manufacturing Company Method for making a spliceless coated abrasive belt and the product thereof
US5951383A (en) * 1995-12-05 1999-09-14 Gerd Eisenblaetter Gmbh Grinding and polishing belt
EP1277546A1 (en) * 2001-07-20 2003-01-22 sia Abrasives Industries AG Abrasive belt with a backing made of vulcanized fibers
CN101941187A (en) * 2010-08-13 2011-01-12 厦门致力金刚石工具有限公司 Diamond abrasive band

Similar Documents

Publication Publication Date Title
US3333372A (en) Abrasive belt
US2391731A (en) Spliced abrasive belt, band, and the like
US5341609A (en) Abrasive belts and their manufacture
GB1492789A (en) Endless belt
GB1164033A (en) Improvements in Welding Thermoplastic Sheet Material
US3154897A (en) Spliced coated abrasive belt
US20020132573A1 (en) Sanding disc
JP2003269543A (en) Seamed, conformable belt and method of making it
US5384988A (en) Lens surfacing assembly
US5529590A (en) Process for the manufacture of endless coated abrasive articles
US3014795A (en) Coated abrasive products
JPS57114366A (en) Flexible sheet-shaped coated grinding material
US2189472A (en) Buffing device
GB1113328A (en) Polishing buff and method of making same
JPH0542483A (en) Grinding belt and its manufacture
US298095A (en) kleinert
US2189754A (en) Endless grinding and polishing belt
US3564782A (en) Abrasive belt joint
KR20150101916A (en) A polishing pad and method of manufacturing it
US3001213A (en) Laminated bondings member
EP0981287B1 (en) Pocket or container
US2209074A (en) Wide abrasive belt
US3119208A (en) Abrasive disc units
US781876A (en) Abrading-disk.
US1988874A (en) Abrasive surfacing disk