# US 7,744,739 B1 · Spiral-wound cylindrical electrostatic oil cleaner > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,744,739 B1 - Document ID: US7744739B1 - Status: Granted - Kind: B1 - Application number: 11/961,534 - Filed: 2007-12-20 - Granted: 2010-06-29 - Earliest claimed: 2006-12-20 - Assignees: CLARCOR Inc. - Inventors: Thomas B. Green - Web page: https://patentgrep.com/patent/US7744739B1 ## CPC - B03C 5/02: Separators - B03C 2201/30: for use in or with vehicles - B03C: MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS (separating isotopes B01D59/00; combinations of magnetic or electrostatic separation with separation of solids by other means B03B, B07B) ## Abstract A cylindrical oil contamination collector for removal of ultra-fine particulate includes a rectangular and continuous length of single-sided, corrugated, phenolic coated paper overlaid with three rectangular electrodes affixed thereto in a spaced-apart, side-by-side arrangement. Two of the electrodes are electrode grounds and the other electrode is a high voltage electrode. The phenolic coated paper is spiral-wound into a continuous spiral with at least one of the three rectangular electrodes sandwiched between adjacent, overlapping turns of the spiral-wound phenolic coated paper. ## Claims ### Claim 1 A cylindrical oil contamination collector for removal of ultra-fine particulate, comprising: a rectangular and continuous length of single-sided, corrugated, phenolic coated paper overlaid with three rectangular electrodes affixed thereto in a spaced-apart, side-by-side arrangement where two of the electrodes are electrode grounds and the other electrode is a high voltage electrode, the phenolic coated paper being spiral-wound into a continuous spiral with at least one of the three rectangular electrodes sandwiched between adjacent, overlapping turns of the spiral-wound phenolic coated paper. ### Claim 2 (depends on 1) The cylindrical oil contamination collector of claim 1, wherein the phenolic corrugated paper includes corrugations having a width of no more than about 4 millimeters. ### Claim 3 (depends on 2) The cylindrical oil contamination collector of claim 2, wherein the corrugations have a width of between about 2 millimeters and about 4 millimeters. ### Claim 4 (depends on 3) The cylindrical oil contamination collector of claim 3, wherein the corrugations have a width of about 3 millimeters. ### Claim 5 (depends on 1) The cylindrical oil contamination collector of claim 1, wherein the phenolic coated paper is a first layer of the phenolic coated paper, a second rectangular and continuous length of single sided, corrugated, phenolic coated paper being overlaid by the first layer of the phenolic coated paper. ### Claim 6 (depends on 1) The cylindrical oil contamination collector of claim 1, wherein the three electrodes comprise aluminum. ### Claim 7 (depends on 1) The cylindrical oil contamination collector of claim 1, wherein a first one of the three electrodes remains radially interior to a second one of the three electrodes in the continuous spiral. ### Claim 8 (depends on 1) The cylindrical oil contamination collector of claim 1, wherein the three rectangular electrodes are affixed to the paper such that the paper remains uncovered by the three electrodes in at least one region of the paper between adjacent ones of the three electrodes. ### Claim 9 (depends on 1) The cylindrical oil contamination collector of claim 1, wherein each of the three electrodes are radially separated from one another by a plurality of the adjacent overlapping turns of the paper in the continuous spiral. ### Claim 10 A method of forming a cylindrical oil contamination collector, comprising: providing a rectangular and continuous length of single-sided, corrugated, phenolic coated paper; affixing three electrodes to the phenolic coated paper in a side-by-side and spaced apart arrangement where two of the electrodes are electrode grounds and the other electrode is a high voltage electrode; and rolling the phenolic coated paper about a mandrel to form a continuous spiral with at least one of the three rectangular electrodes sandwiched between adjacent, overlapping turns of the spiral-wound phenolic coated paper. ### Claim 11 (depends on 10) The method of claim 10, wherein the step of affixing the three electrodes to the phenolic coated paper comprises gluing. ### Claim 12 (depends on 10) The method of claim 10, comprising tensioning the phenolic paper with a force of about three pounds as the phenolic coated paper is rolled. ### Claim 13 (depends on 10) The method of claim 10, wherein the phenolic corrugated paper includes corrugations having a width of no more than about 4 millimeters. ### Claim 14 (depends on 10) The method of claim 10, wherein the phenolic coated paper is a first layer, the method further comprising affixing a second layer of the continuous length of single-sided, corrugated, phenolic coated paper to the first layer, the first layer overlapping the second layer. ### Claim 15 (depends on 10) The method of claim 10, wherein the step of rolling includes rolling the paper such that a first one of the three electrodes remains circumferentially overlapped on either end thereof by at least one of a second and a third one of the three electrodes. ### Claim 16 (depends on 10) The method of claim 10 wherein the step of affixing further includes selecting the three electrodes such that each one of the three electrodes has a different width than each other one of the three electrodes. ### Claim 17 (depends on 10) The method of claim 10, wherein the step of affixing includes affixing a first one of the three electrodes proximate to a first end of the paper, affixing a second one of the three electrodes in a spaced apart relationship from the first one such that a region of exposed paper exists therebetween, and affixing a third one of the three electrodes to a second end of the paper such that the third one of the three electrodes extends beyond the second end of the paper.