Drywall sanding block and method of using

Patent metadata

Field	Value
Publication number	US-10875154-B2
Application number	US-201615764522-A
Country	US
Kind code	B2
Filing date	Sep 30, 2016
Priority date	Oct 2, 2015
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

A sanding block adapted for abrading a surface, particularly drywall joints, comprising: (a) a body having an array of elongated raised portions having raised end surfaces and recessed portions, the raised end surfaces collectively defining an abrasive working surface and the recessed portions defining channels between adjacent raised portions; (b) a make coat on the end surfaces; and (c) abrasive particles at least partially embedded in the make coat. Also methods of using such sanding blocks.

First claim

What is claimed is:

1. A sanding block adapted for abrading a drywall joint, the block comprising:
(a) a body including a bottom edge, a top edge, and two side edges, the body having an array of a plurality of elongated raised portions having raised end surfaces and a plurality of recessed portions, the raised end surfaces collectively defining an abrasive working surface and the recessed portions defining channels between adjacent raised portions; wherein the channels open on two of the edges, and wherein the channels extend between the channel openings along a continuous, non-linear path between the top and bottom edges, such that the channels have an average longest straight line dimension of from about 15 to about 50 mm;
(b) a make coat on at least a portion of the end surfaces; and
(c) abrasive particles at least partially embedded in the make coat;
wherein the recessed portions have an average depth of at least about 2 mm and have an average narrow dimension of at least about 2 mm; and
wherein the raised portions have a minimum straight line dimension of at least about 15 mm.

2. The sanding block of claim 1 wherein the recessed portions have an average depth of at from about 2 to about 4 mm.

3. The sanding block of claim 1 wherein the recessed portions have an average depth of from about 3 to about 3.5 mm.

4. The sanding block of claim 1 wherein the recessed portions have an average narrow dimension of from about 2 to about 6 mm.

5. The sanding block of claim 1 wherein the raised portions are an array of parallel chevron-shaped or sinusoidal-shaped portions.

6. The sanding block of claim 1 wherein the raised portions have an average narrowest dimension of at least about 2 mm.

7. The sanding block of claim 1 wherein the raised portions have an average narrowest dimension of from about 7 to about 9 mm.

8. The sanding block of claim 1 wherein the raised portions have a minimum length of from about 15 to about 35 mm.

9. The sanding block of claim 1 where at least one raised portions extends the full length of the working surface.

10. The sanding block of claim 1 wherein the abrasive particles have a hardness of at least 1200 Knoops.

11. The sanding block of claim 1 wherein the abrasive particles have a hardness of at least 2,000 Knoops.

12. The sanding block of claim 1 wherein the abrasive particles are selected from the group consisting of aluminum oxide, alumina-based ceramics, silicon carbide, zirconia, alumina-zirconia, garnet, diamond, ceria, cubic boron nitride, ground glass, quartz, titanium diboride, sol gel abrasives, and combinations thereof.

13. The sanding block of claim 1 wherein the body is a unitary article.

14. The sanding block of claim 1 wherein the sanding block article has a width of at least 2 inches (50 mm) and a length of at least 3 inches (76 mm).

15. The sanding block of claim 1 wherein the body is resilient.

16. The sanding block of claim 15 wherein the body is formed of foam having a density of at least 3 pcf.

17. The sanding block of claim 15 wherein the body is formed of an open cell foam or a closed cell foam.

18. A method of sanding a drywall joint or drywall patch comprising:
(a) providing a sanding block of claim 1 ;
(b) grasping the sanding block by hand such that the working surface is presented to engage with a drywall joint or patch;
(c) contacting the working surface to the drywall joint or patch; and
(d) repeatedly moving the sanding block in an abrasive manner against the drywall joint or patch so as to smooth the drywall joint or patch.

19. The method of claim 18 wherein the sanding block is grasped by two hands.

20. The method of claim 18 wherein the sanding block is repeatedly moved in a reciprocating manner against the drywall joint or patch.

Assignees

• 3M Innovative Properties Co

Inventors

• Dow David R

Classifications

• B24D15/04 Primary

  resilient; with resiliently-mounted operative surface · CPC title

• B24D15/023

  using in exchangeable arrangement a layer of flexible material · CPC title