GB2113241A - Improvements in or relating to abrasive materials - Google Patents

Improvements in or relating to abrasive materials Download PDF

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Publication number
GB2113241A
GB2113241A GB08200817A GB8200817A GB2113241A GB 2113241 A GB2113241 A GB 2113241A GB 08200817 A GB08200817 A GB 08200817A GB 8200817 A GB8200817 A GB 8200817A GB 2113241 A GB2113241 A GB 2113241A
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GB
United Kingdom
Prior art keywords
sheet
abrasive
sanding block
reinforcement
flexible plastics
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.)
Withdrawn
Application number
GB08200817A
Inventor
John Mackie
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB08200817A priority Critical patent/GB2113241A/en
Publication of GB2113241A publication Critical patent/GB2113241A/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials

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

Abstract

An abrasive sheet, e.g. of sand paper, is disclosed, having a flexible plastics reinforcement. This reinforcement may extend beyond one edge of the sheet and be in the form of an adhesive tongue whereby (a) a plurality of said sheets may be releasably secured together for ease of dispensing and (b) the sheet may be formed into an endless abrasive band. A preferred sanding block adapted to receive such an adhesive band as a snug fit therearound is also disclosed.

Description

SPECIFICATION Improvements in or relating to abrasive materials This invention is concerned with improvements in or relating to abrasive materials such as sandpaper, glass paper, glass-cloth, emery paper, etc.
According to a first aspect of the present invention there is provided an abrasive sheet comprising a flexible backing sheet bearing a coating of abrasive particles, the reverse of the backing sheet being provided with a flexible plastics reinforcement. The flexible plastics reinforcement may be incorporated into the abrasive sheet during manufacture thereof or applied as a sheet or coating subsequent to such manufacture. Preferably the flexible plastics reinforcement is in the form of a sheet and polyester sheet is preferred. In one embodiment polyester sheet in the form of an adhesive tape is applied to the reverse side of an already fabricated abrasive sheet, the polyester having a thickness of 38 microns.
In a modification of this aspect of the invention the plastics reinforcement is arranged to extend beyond one edge of the abrasive sheet and bears an adhesive coating on one surface of the extended portion whereby the opposite edge portion of the abrasive sheet may be adhered thereto to form an endless abrasive band. The extended adhesive portion may be protected by a removable protective covering until such time as it is required. A plurality of such abrasive sheets may be assembled, the extended adhesive portion of the reinforcement of one sheet being releaseably adhered to the back of a superposed plastics reinforced abrasive sheet, preferably to a similar extended adhesive portion of a similar superposed abrasive sheet, whereby an assembly of abrasive sheets can be produced from which individual abrasive sheets may be removed as required.It has been found that commercially available polyester adhesive tapes have suitable properties for this to be achieved.
Thus a second aspect of the present invention provides an assembly of superposed abrasive sheets releasably adhered together adajacent one margin thereof by means of an extended adhesive portion of a flexible plastics reinforcement applied to each sheet, from which an individual sheet is removable for formation thereafter into an endless abrasive band.
The endless abrasive band produced by the present invention is particularly adapted for use with a sanding block made of a suitable resilient material. Such a material may be a foamed plastics having a density of from 6 to 8 Ibs per cu.
ft., e.g. a polyurethane, polyethylene or polypropylene foam. Suitably, the sanding block is cylindrical in shape, having a transverse section which may be elliptical or, preferably, which has two major edges parallel and generally convex end portions joining said major edges. The sanding block may be produced by cutting to shape of larger blocks or pieces of material or may be produced by an extrusion, casting or injection moulding process.
Thus, according to a third aspect of the present invention there is provided a combination of a sanding block of resilient material and, snugly fitted therearound, an endless abrasive band.
The sanding block itself constitutes a fourth aspect of the present invention.
The present invention affords a greater working life to the abrasive material in that the material itself is reinforced, in that the resilient sanding block provides a very satisfactory support for the abrasive material, and in that the endless abrasive band can be rotated about the sanding block to ensure even wear of the abrasive material. The invention also affords a convenient system for dispensing and storing abrasive materials.
1. An abrasive sheet comprising a flexible backing sheet bearing a coating of abrasive particles, the reverse of the backing sheet being provided with a flexible plastics reinforcement.
2. A sheet according to claim 1, wherein the flexible plastics reinforcement is incorporated into the abrasive sheet during manufacture of the abrasive sheet.
3. A sheet according to claim 1, wherein the flexible plastics reinforcement is applied to the backing sheet subsequent to the manufacture of the abrasive sheet.
4. A sheet according to any preceding claim, wherein the flexible plastics reinforcement is in the form of a sheet.
5. A sheet according to claim 4, wherein the plastics is polyester.
6. A sheet according to claim 5, when dependent upon claim 3, wherein the flexible plastics reinforcement comprises a polyester adhesive tape.
7. A sheet according to any preceding claim, wherein the plastics reinforcement is arranged to extend beyond one edge of the abrasive sheet and bears an adhesive coating on one surface of the extended portion thereof whereby the opposite edge portion of the abrasive sheet may be adhered thereto to form an abrasive band.
8. A sheet according to claim 7, wherein the adhesive coating is protected by a removable protective covering.
9. An abrasive sheet substantially as hereinbefore described.
1 0. An assembly of a plurality of abrasive sheets as claimed in claim 7, the extended adhesive portion of each sheet (except the last) being releasably adhered to the back of a superposed similar sheet to form a stack of said sheets.
1 An assembly according to claim 10, wherein each said extended adhesive portion is releasably adhered to the back of a similar extended adhesive portion of a similar superposed abrasive sheet.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (1)

  1. **WARNING** start of CLMS field may overlap end of DESC **.
    SPECIFICATION Improvements in or relating to abrasive materials This invention is concerned with improvements in or relating to abrasive materials such as sandpaper, glass paper, glass-cloth, emery paper, etc.
    According to a first aspect of the present invention there is provided an abrasive sheet comprising a flexible backing sheet bearing a coating of abrasive particles, the reverse of the backing sheet being provided with a flexible plastics reinforcement. The flexible plastics reinforcement may be incorporated into the abrasive sheet during manufacture thereof or applied as a sheet or coating subsequent to such manufacture. Preferably the flexible plastics reinforcement is in the form of a sheet and polyester sheet is preferred. In one embodiment polyester sheet in the form of an adhesive tape is applied to the reverse side of an already fabricated abrasive sheet, the polyester having a thickness of 38 microns.
    In a modification of this aspect of the invention the plastics reinforcement is arranged to extend beyond one edge of the abrasive sheet and bears an adhesive coating on one surface of the extended portion whereby the opposite edge portion of the abrasive sheet may be adhered thereto to form an endless abrasive band. The extended adhesive portion may be protected by a removable protective covering until such time as it is required. A plurality of such abrasive sheets may be assembled, the extended adhesive portion of the reinforcement of one sheet being releaseably adhered to the back of a superposed plastics reinforced abrasive sheet, preferably to a similar extended adhesive portion of a similar superposed abrasive sheet, whereby an assembly of abrasive sheets can be produced from which individual abrasive sheets may be removed as required.It has been found that commercially available polyester adhesive tapes have suitable properties for this to be achieved.
    Thus a second aspect of the present invention provides an assembly of superposed abrasive sheets releasably adhered together adajacent one margin thereof by means of an extended adhesive portion of a flexible plastics reinforcement applied to each sheet, from which an individual sheet is removable for formation thereafter into an endless abrasive band.
    The endless abrasive band produced by the present invention is particularly adapted for use with a sanding block made of a suitable resilient material. Such a material may be a foamed plastics having a density of from 6 to 8 Ibs per cu.
    ft., e.g. a polyurethane, polyethylene or polypropylene foam. Suitably, the sanding block is cylindrical in shape, having a transverse section which may be elliptical or, preferably, which has two major edges parallel and generally convex end portions joining said major edges. The sanding block may be produced by cutting to shape of larger blocks or pieces of material or may be produced by an extrusion, casting or injection moulding process.
    Thus, according to a third aspect of the present invention there is provided a combination of a sanding block of resilient material and, snugly fitted therearound, an endless abrasive band.
    The sanding block itself constitutes a fourth aspect of the present invention.
    The present invention affords a greater working life to the abrasive material in that the material itself is reinforced, in that the resilient sanding block provides a very satisfactory support for the abrasive material, and in that the endless abrasive band can be rotated about the sanding block to ensure even wear of the abrasive material. The invention also affords a convenient system for dispensing and storing abrasive materials.
    1. An abrasive sheet comprising a flexible backing sheet bearing a coating of abrasive particles, the reverse of the backing sheet being provided with a flexible plastics reinforcement.
    2. A sheet according to claim 1, wherein the flexible plastics reinforcement is incorporated into the abrasive sheet during manufacture of the abrasive sheet.
    3. A sheet according to claim 1, wherein the flexible plastics reinforcement is applied to the backing sheet subsequent to the manufacture of the abrasive sheet.
    4. A sheet according to any preceding claim, wherein the flexible plastics reinforcement is in the form of a sheet.
    5. A sheet according to claim 4, wherein the plastics is polyester.
    6. A sheet according to claim 5, when dependent upon claim 3, wherein the flexible plastics reinforcement comprises a polyester adhesive tape.
    7. A sheet according to any preceding claim, wherein the plastics reinforcement is arranged to extend beyond one edge of the abrasive sheet and bears an adhesive coating on one surface of the extended portion thereof whereby the opposite edge portion of the abrasive sheet may be adhered thereto to form an abrasive band.
    8. A sheet according to claim 7, wherein the adhesive coating is protected by a removable protective covering.
    9. An abrasive sheet substantially as hereinbefore described.
    1 0. An assembly of a plurality of abrasive sheets as claimed in claim 7, the extended adhesive portion of each sheet (except the last) being releasably adhered to the back of a superposed similar sheet to form a stack of said sheets.
    1 An assembly according to claim 10, wherein each said extended adhesive portion is releasably adhered to the back of a similar extended adhesive portion of a similar superposed abrasive sheet.
    1 2. An abrasive sheet according to claim 7 or separated from an assembly as claimed in claim 10 or 11 and in the form of an endless abrasive band.
    13. A sheet according to claim 12 in combination with a sanding block made of resilient material around which the sheet in the form of a band is snugly fitted.
    14. A combination according to claim 13, wherein the sanding block is made of a plastics foam having a density of from 6 to 8 Ibs per cu. ft.
    (96 to 128 Kg/cu.m).
    1 5. A combination according to claim 13 or 14, wherein the sanding block is cylindrical having an elliptical transverse section.
    1 6. A combination according to claim 13, wherein the sanding block is cylindrical having a transverse section which has two generally parallel major edges joined by generally convex ends.
    17. A sanding block as claimed in any one of claims 13 to 1 6.
    1 8. The features hereinbefore described, or their equivalents, in any novel selection.
GB08200817A 1982-01-12 1982-01-12 Improvements in or relating to abrasive materials Withdrawn GB2113241A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08200817A GB2113241A (en) 1982-01-12 1982-01-12 Improvements in or relating to abrasive materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08200817A GB2113241A (en) 1982-01-12 1982-01-12 Improvements in or relating to abrasive materials

Publications (1)

Publication Number Publication Date
GB2113241A true GB2113241A (en) 1983-08-03

Family

ID=10527582

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08200817A Withdrawn GB2113241A (en) 1982-01-12 1982-01-12 Improvements in or relating to abrasive materials

Country Status (1)

Country Link
GB (1) GB2113241A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4966609A (en) * 1989-04-07 1990-10-30 Uniroyal Plastics Co., Inc. Conformable abrasive article

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4966609A (en) * 1989-04-07 1990-10-30 Uniroyal Plastics Co., Inc. Conformable abrasive article

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Legal Events

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)