# US 11,298,791 B2 · Method and system for removing material from a workpiece > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,298,791 B2 - Document ID: US11298791B2 - Status: Granted - Kind: B2 - Application number: 15/278,423 - Filed: 2016-09-28 - Published: 2017-03-30 - Granted: 2022-04-12 - Earliest claimed: 2015-09-28 - Assignees: Saint-Gobain Abrasives, Inc.; Saint-Gobain Abrasifs - Applicants: Saint-Gobain Abrasives, Inc.; Saint-Gobain Abrasifs - Inventors: John S. Hagan; Robert J. McNamee; Tony Landes; Brian Rutkiewicz; William Lang; Mike D. Shappell - Web page: https://patentgrep.com/patent/US11298791B2 ## CPC - B24B 19/14: for grinding turbine blades, propeller blades or the like (using grinding belts B24B21/16) - B24B 21/08: Pressure shoes; {Pressure members, e.g.} backing belts - B24B 21/16: for grinding other surfaces of particular shape (single purpose machines for grinding cams or camshafts B24B19/12) - B24D 11/00: Constructional features of flexible abrasive materials; Special features in the manufacture of such materials - B24B 55/02: Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant (cooling or lubricating during dressing operation B24B53/095; incorporated in grinding wheels B24D) - B24B: MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING (grinding of gear teeth B23F, of screw-threads B23G1/36; by electro-erosion B23H; abrasive or related blasting B24C; tools for grinding, buffing or sharpening B24D; polishing compositions C09G1/00; abrasives C09K3/14; electrolytic etching or polishing C25F3/00; grinding arrangements for use on assembled railway tracks E01B31/17); DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS - 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 method of removing material from a workpiece includes moving a coated abrasive over a receiving surface of a platen, the receiving surface having at least one opening configured for the flow of an ejection material therethrough, moving the platen and workpiece relative to each other to contact the coated abrasive to the workpiece and removing material from the workpiece, and controlling a flow pressure for the ejection material through the at least one opening during removing material from the workpiece, where the flow pressure of the ejection material can be adjusted based on at least one of the operation parameters such as a translation rate of the coated abrasive over the receiving surface, the weight of the coated abrasive, a material removal rate, a coefficient of friction between the coated abrasive and the platen, or a combination thereof. ## Claims ### Claim 1 An article, comprising: a platen comprising: a body having a convex receiving surface configured for movement of a coated abrasive thereon; at least one opening intersecting the convex receiving surface and configured to allow for flow of an ejection material therethrough; and a coating is disposed over and in direct contract with the convex receiving surface of the platen, and wherein the coating comprises a Shore A hardness of not greater than 100A; wherein the body comprises a thickness defined as a distance between a bottom surface of the body and the convex receiving surface of the body as viewed from a lateral cross-sectional plane of the body, and wherein the body comprises a first uniform thickness extending from a first distal end of the body and a second uniform thickness extending from a second opposing distal end of the body, such that the thickness varies along a longitudinal cross-sectional plane of the body over which the coated abrasive moves. ### Claim 2 (depends on 1) The article of claim 1, wherein the coating comprises an opening corresponding with the at least one opening on the convex receiving surface of the platen. ### Claim 3 (depends on 1) The article of claim 1, wherein the platen comprises at least three openings, wherein the coating comprises at least three openings corresponding with the at least three openings on the convex receiving surface of the platen, and wherein the at least three openings are positioned in a straight line or a triangular orientation with respect to each other. ### Claim 4 (depends on 1) The article of claim 1, wherein the coating comprises a plurality of layers including a first layer overlying and in direct contact with the convex receiving surface and a second layer overlying and in direct contact with the first layer. ### Claim 5 (depends on 4) The article of claim 4, wherein the first layer comprises a material selected from the group consisting of an elastic polymer, felt, cork, and rubber. ### Claim 6 (depends on 4) The article of claim 4, wherein the second layer comprises a material selected from the group consisting of graphite or polytetrafluoroethylene (PTFE). ### Claim 7 (depends on 4) The article of claim 4, wherein the second layer comprises a coefficient of friction of less than 0.5. ### Claim 8 (depends on 4) The article of claim 4, wherein the second layer comprises a thickness of at least 1 mm and not greater than 5 mm. ### Claim 9 (depends on 4) The article of claim 4, wherein the second layer comprises a thickness that is less than a thickness of the first layer. ### Claim 10 (depends on 4) The article of claim 4, wherein the second layer is adhered to the first layer via at least one adhesive. ### Claim 11 (depends on 4) The article of claim 4, wherein the second layer is directly contacting the first layer. ### Claim 12 (depends on 4) The article of claim 4, wherein the first layer comprises a material having a Shore A hardness of not greater than 100A. ### Claim 13 An article, comprising: a platen comprising a body having a convex receiving surface configured for movement of a coated abrasive thereon; at least two openings intersecting the convex receiving surface and configured to allow for flow of an ejection material therethrough; and a coating disposed over the convex receiving surface of the platen, wherein the coating comprises a plurality of layers including a first layer overlying and in direct contact with the convex receiving surface and a second layer overlying and in direct contact with the first layer, wherein the first layer comprises a Shore A hardness of not greater than 100A; wherein the body comprises a thickness defined as distance between a bottom surface of the body and the convex receiving surface of the body as viewed from a lateral cross-sectional plane of the body, and wherein the body comprises a first uniform thickness extending from a first distal end of the body and a second uniform thickness extending from a second opposing distal end of the body, such that the thickness varies along a longitudinal cross-sectional plane of the body over which the coated abrasive moves. ### Claim 14 (depends on 13) The article of claim 13, further comprising an inlet configured to provide the ejection material to an interior passageway within the body. ### Claim 15 (depends on 14) The article of claim 14, wherein the interior passageway is disposed within the body of the platen and is fluidly connected to at least one of the openings and the inlet, wherein the inlet is positioned on a side surface of the body. ### Claim 16 (depends on 14) The article of claim 14, wherein the inlet is positioned on a side surface of a distal end of the platen. ### Claim 17 (depends on 1) The article of claim 1, wherein the body includes a maximum height defined as the maximum distance between a bottom surface of the body and the convex receiving surface of the body, a minimum height defined as the minimum distance between the bottom surface of the body and the convex receiving surface of the body, and wherein the at least one opening is positioned between the minimum height and the maximum height of the convex receiving surface. ### Claim 18 A system, comprising: a translation assembly configured for translation of a coated abrasive; a platen comprising a body having a receiving surface configured for movement of the coated abrasive thereon; a plurality of openings intersecting the receiving surface and configured to allow for flow of an ejection material therethrough, wherein the receiving surface comprises a convex contour along a lateral cross-sectional plane of the body; and a coating disposed over and in direct contact with the receiving surface of the platen, and wherein the coating comprises a Shore A hardness of not greater than 100A; wherein the body comprises a thickness defined as a distance between a bottom surface of the body and the convex receiving surface of the body as viewed from a lateral cross-sectional plane of the body, and wherein the body comprises a first uniform thickness extending from a first distal end of the body and a second uniform thickness extending from a second opposing distal end of the body, such that the thickness varies along a longitudinal cross-sectional plane of the body over which the coated abrasive moves.