# US 12,759,111 B2 · Coated abrasive belt and methods of making and using the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,759,111 B2 - Document ID: US12759111B2 - Status: Granted - Kind: B2 - Application number: 17/292,213 - Filed: 2019-11-14 - Published: 2022-01-06 - Granted: 2026-10-13 - Earliest claimed: 2018-11-15 - Assignees: 3M Innovative Properties Company - Applicants: 3M Innovative Properties Company - Inventors: Joseph B. Eckel; Aaron K. Nienaber; Erin D. Spring; Brant A. Moegenburg; Eric M. Moore; Thomas J. Nelson; Thomas P. Hanschen; Steven J. Keipert - Web page: https://patentgrep.com/patent/US12759111B2 ## CPC - B24D 11/00: Constructional features of flexible abrasive materials; Special features in the manufacture of such materials - B24D 11/001: {Manufacture of flexible abrasive materials} - B24D 2203/00: Tool surfaces formed with a pattern - B24D: TOOLS FOR GRINDING, BUFFING OR SHARPENING (abrading-bodies specially designed for tumbling apparatus, e.g. abrading-balls B24B31/14; honing tools B24B33/08; lapping tools B24B37/11) ## Abstract A coated abrasive belt (100) includes a belt backing (110) and an abrasive layer disposed thereon. The abrasive layer comprises abrasive elements (160) secured to at least a portion of a major surface of the belt backing (110) by at least one binder material. The abrasive elements are disposed at contiguous intersections of horizontal (192) and vertical lines (194) of a rectangular grid pattern. Each abrasive element has at least two triangular abrasive platelets (130), each having respective top and bottom surfaces connected to each other, and separated by, three sidewalls. On a respective basis, one sidewall of the triangular abrasive platelets is disposed facing and proximate to the belt backing. A first portion of the abrasive elements is arranged in alternating first rows (16) wherein the triangular abrasive platelets are disposed lengthwise aligned with the vertical lines (194). A second portion of the abrasive elements is arranged in alternating second rows (168) wherein the triangular abrasive platelets (130) are disposed lengthwise aligned with the horizontal lines (194). The first and second rows repeatedly alternate along the vertical lines. Methods of making and using the coated abrasive belt are also disclosed. ## Claims ### Claim 1 An abrasive belt comprising: an endless belt backing; an abrasive layer disposed on the belt backing, wherein at least a portion of the abrasive layer comprises abrasive elements secured to a major surface of the belt backing by at least one binder material, wherein the abrasive elements are disposed at contiguous intersections of horizontal lines and vertical lines of a rectangular grid pattern, wherein at least 70 percent of the intersections have one of the abrasive elements disposed thereat, wherein each of the abrasive elements has at least two triangular abrasive platelets, wherein each of the triangular abrasive platelets has respective top and bottom surfaces connected to each other, and separated by, three sidewalls, wherein, on a respective basis, one sidewall of at least 90 percent of the triangular abrasive platelets is disposed facing and proximate to the belt backing, wherein the abrasive elements are arranged in first rows and second rows, wherein all the triangular abrasive platelets in the first rows having one sidewall disposed facing and proximate to the belt backing are disposed lengthwise aligned within 10 degrees of the vertical lines, wherein all the triangular abrasive platelets in the second rows having one sidewall disposed facing and proximate to the belt backing are disposed lengthwise aligned within 10 degrees of the horizontal lines, wherein the first and second rows repeatedly alternate along the vertical lines such that any two adjacent first rows are separated only by one of the second rows and any two adjacent second rows are separated only by one of the first rows, and wherein spacing of the vertical lines and spacing of the horizontal lines are the same. ### Claim 2 (depends on 1) The abrasive belt of claim 1, wherein the abrasive belt has a longitudinal axis, and wherein the horizontal lines are disposed at an angle relative to the longitudinal axis of the abrasive belt, and wherein the angle is between 40 and 50 degrees. ### Claim 3 (depends on 2) The abrasive belt of claim 2, wherein at least 90 percent of the intersections have one of the abrasive elements disposed thereat. ### Claim 4 (depends on 2) The abrasive belt of claim 2, wherein all the triangular abrasive platelets in the first rows are disposed lengthwise aligned within 5 degrees of the vertical lines, wherein all the triangular abrasive platelets in the second rows are disposed lengthwise aligned within 5 degrees of the horizontal lines. ### Claim 5 (depends on 2) The abrasive belt of claim 2, wherein the abrasive layer further comprises crushed abrasive or non-abrasive particles. ### Claim 6 (depends on 2) The abrasive belt of claim 2, wherein the abrasive layer comprises a make layer and a size layer disposed over the make layer and the abrasive elements. ### Claim 7 (depends on 2) The abrasive belt of claim 2, wherein the triangular abrasive platelets comprise alpha alumina. ### Claim 8 (depends on 1) The abrasive belt of claim 1, wherein at least 90 percent of the intersections have one of the abrasive elements disposed thereat. ### Claim 9 (depends on 1) The abrasive belt of claim 1, wherein all the triangular abrasive platelets in the first rows are disposed lengthwise aligned within 5 degrees of the vertical lines, wherein all the triangular abrasive platelets in the second rows are disposed lengthwise aligned within 5 degrees of the horizontal lines. ### Claim 10 (depends on 1) The abrasive belt of claim 1, wherein the abrasive layer further comprises crushed abrasive or non-abrasive particles. ### Claim 11 (depends on 1) The abrasive belt of claim 1, wherein the abrasive layer comprises a make layer and a size layer disposed over the make layer and the abrasive elements. ### Claim 12 (depends on 1) The abrasive belt of claim 1, wherein the triangular abrasive platelets comprise alpha alumina. ### Claim 13 (depends on 1) The abrasive belt of claim 1, wherein each of the abrasive elements has exactly two triangular abrasive platelets. ### Claim 14 (depends on 1) A method of abrading a workpiece, the method comprising frictionally contacting a portion of the abrasive layer of an abrasive belt according to claim 1 with the workpiece, and moving at least one of the workpiece and the abrasive belt relative to the other to abrade the workpiece. ### Claim 15 A method of making a coated abrasive belt, the method comprising: disposing a curable make layer precursor on a major surface of a belt backing; embedding abrasive elements into the curable make layer precursor, wherein at least some of the abrasive elements are disposed adjacent to contiguous intersections of horizontal lines and vertical lines of a rectangular grid pattern, wherein at least 70 percent of the intersections have one of the abrasive elements disposed thereat, wherein each of the abrasive elements has at least two triangular abrasive platelets, wherein each of the triangular abrasive platelets has respective top and bottom surfaces connected to each other, and separated by, three sidewalls, wherein, on a respective basis, one sidewall of at least 90 percent of the triangular abrasive platelets is disposed facing and proximate to the belt backing, wherein the abrasive elements are arranged in first rows and second rows, wherein all the triangular abrasive platelets in the first rows having one sidewall disposed facing and proximate to the belt backing are disposed lengthwise aligned within 10 degrees of the vertical lines, wherein all the triangular abrasive platelets in the second rows having one sidewall disposed facing and proximate to the belt backing are disposed lengthwise aligned within 10 degrees of the horizontal lines, and wherein the first and second rows repeatedly alternate along the vertical lines, such that any two adjacent first rows are separated only by one of the second rows and any two adjacent second rows are separated only by one of the first rows, and wherein spacing of the vertical lines and spacing of the horizontal lines are the same; at least partially curing the curable make layer precursor to provide an at least partially cured make layer; disposing a curable size layer precursor over the at least partially cured make layer and the abrasive elements; and at least partially curing the curable size layer precursor to provide a size layer. ### Claim 16 (depends on 15) The method of claim 15, wherein at least 90 percent of the intersections have one of the abrasive elements disposed thereat. ### Claim 17 (depends on 15) The method of claim 15, wherein the coated abrasive belt has a longitudinal axis, and wherein the horizontal lines are disposed at an angle relative to the longitudinal axis of the coated abrasive belt, and wherein the angle is between 40 and 50 degrees. ### Claim 18 (depends on 15) The method of claim 15, wherein all the triangular abrasive platelets in the second rows are disposed lengthwise aligned within 5 degrees of the horizontal lines, and wherein all the triangular abrasive platelets in the first rows are disposed lengthwise aligned within 5 degrees of the vertical lines. ### Claim 19 (depends on 15) The method of claim 15, wherein the abrasive layer further comprises crushed abrasive or non-abrasive particles. ### Claim 20 (depends on 15) The method of claim 15, wherein the triangular abrasive platelets comprise alpha alumina.