# US 2014/0198163 A1 · Inkjet Printer Having An Image Drum Heater And Cooler > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0198163 A1 - Document ID: US20140198163A1 - Status: Published application - Kind: A1 - Application number: 14/217,559 - Filed: 2014-03-18 - Published: 2014-07-17 - Earliest claimed: 2012-06-06 - Assignees: Xerox Corporation - Applicants: Xerox Corporation - Inventors: Roger G. Leighton; Michael F. Leo; Venkata B. Chivukula - Web page: https://patentgrep.com/patent/US20140198163A1 ## CPC - B41J 29/377: Cooling or ventilating arrangements - B41J 2/0057: {where an intermediate transfer member receives the ink before transferring it on the printing material} - B41J 2/17593: {Supplying ink in a solid state} - G03G 15/751: {relating to drum (G03G15/757 takes precedence)} - H05B 3/24: heating conductor being self-supporting - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL ## Abstract An inkjet offset printer includes a heated drum assembly having a hollow drum with an internal surface defining an internal cavity and a heater and a cooler located in the internal cavity. The heater includes at least one ceramic heater element. The cooler includes a slot to direct an air stream that is normal to the internal surface of the drum that aids in quenching the heating element for faster control responses. ## Claims ### Claim 1 A heated drum assembly for use in a printer, the heated drum assembly comprising: a hollow drum including an internal surface defining an internal cavity, the hollow drum having a first end and a second end and a longitudinal axis; a heater located in the internal cavity of the hollow drum to heat the internal surface, the heater including a first ceramic heating element; and a cooler, located in the internal cavity of the hollow drum, the cooler having a first housing and at least one aperture that extends in a direction parallel to the longitudinal axis of the hollow drum to enable a stream of coolant to be directed toward the internal surface of the hollow drum in a direction normal to the internal surface. ### Claim 2 (depends on 1) The heated drum assembly of claim 1, the heater further comprising: a second ceramic heating element disposed adjacent to the first ceramic heating element and defining a space between the first heating element and the second heating element, the housing of the cooler being located in the space. ### Claim 3 (depends on 2) The heated drum assembly of claim 2, the cooler further comprising: a second housing having at least one aperture that extends in a direction parallel to the longitudinal axis of the hollow drum to enable a stream of coolant to be directed toward the internal surface of the hollow drum in a direction normal to the internal surface. ### Claim 4 (depends on 3) The heated drum assembly of claim 3, the cooler further comprising: a third housing having at least one aperture that extends in a direction parallel to the longitudinal axis of the hollow drum to enable a stream of coolant to be directed toward the internal surface of the hollow drum in a direction normal to the internal surface. ### Claim 5 (depends on 4) The heated drum assembly of claim 4, the cooler further comprising: a conduit configured to direct a flow of air into the first, the second, and the third housings that exits the at least one apertures of the first, the second, and the third housings. ### Claim 6 (depends on 5) The heated drum assembly of claim 5 wherein the at least one aperture of the first, the second, and the third housings is a slot. ### Claim 7 (depends on 6) The heated drum assembly of claim 6 wherein each of the first ceramic heating element and the second ceramic heating element defines a three dimensional volume having at least one surface directed toward the internal surface of the hollow drum. ### Claim 8 (depends on 7) The heated drum assembly of claim 7 wherein the first ceramic heating element and the second ceramic heating element define a rectangular prism with the at least one surface defining a planar surface. ### Claim 9 (depends on 5) The heated drum assembly of claim 5 further comprising: a plurality of spokes radiating from a central hub and operatively connected to the hollow drum to support the central hub along the longitudinal axis of the hollow drum, the central hub being configured to support the conduit of the cooler. ### Claim 10 (depends on 9) The heated drum assembly of claim 9, the central hub further comprising: a bearing to provide relative motion between the hollow drum and the cooler to enable the hollow drum to rotate with respect to the cooler. ### Claim 11 A printer comprising: an image receiving member including a substantially cylindrical outer surface and an internal surface defining an internal cavity, the image receiving member having a first end and a second end and a longitudinal axis, at least one ceramic heating element located in the internal cavity, to heat the internal surface of the image receiving member, and a cooler located in the internal cavity of the hollow drum, the cooler having a first housing and at least one aperture that extends in a direction parallel to the longitudinal axis of the hollow drum to enable a stream of coolant to be directed toward the internal surface of the hollow drum in a direction normal to the internal surface; a printhead, to deposit ink on the image receiving member, the printhead disposed adjacent to the image receiving member; and a controller, operatively connected to the heater, the cooler, and the printhead, the controller being configured to control the application of heat to the internal surface by the heater, to control the application of cooling to the internal surface by the cooler, and to control the printhead to deposit ink on the image receiving member during one of the application of heat and the application of cooling. ### Claim 12 (depends on 11) The printer of claim 11, the at least one ceramic heating element further comprising: a first ceramic heating element and a second ceramic heating element each being disposed adjacent to the internal surface of the image receiving member, the first ceramic heating element and the second ceramic heating element defining a space between the first ceramic heating element and the second ceramic heating element, and the first housing of the cooler is located in the space defined between the first ceramic heating element and the second ceramic heating element. ### Claim 13 (depends on 12) The printer of claim 12, the cooler further comprising: a second housing having at least one aperture that extends in a direction parallel to the longitudinal axis of the hollow drum to enable a stream of coolant to be directed toward the internal surface of the hollow drum in a direction normal to the internal surface. ### Claim 14 (depends on 13) The printer of claim 13, the cooler further comprising: a conduit configured to direct a flow of air into the first, the second, and the third housings that exits the at least one apertures of the first, the second, and the third housings. ### Claim 15 (depends on 14) The printer of claim 14 wherein the at least one aperture of the first, the second, and the third housings is a slot. ### Claim 16 (depends on 14) The printer of claim 14, the image receiving member further comprising: a plurality of spokes radiating from a central hub and operatively connected to the image receiving member to support the central hub along the longitudinal axis of the image receiving member, the central hub being configured to support the conduit of the cooler. ### Claim 17 (depends on 17) The printer of claim 17, the central hub further comprising: a bearing to provide relative motion between the image receiving member and the cooler to enable the substantially cylindrical outer surface to rotate with respect to the cooler. ### Claim 18 (depends on 18) The printer of claim 18, the controller being further configured to remove power from the heater while maintaining air flow through the cooler. ### Claim 19 (depends on 19) The printer of claim 19, each of the first ceramic heater and the second ceramic heater further comprising: a rectangular prism wherein the largest surfaces thereof are placed in closest proximity to the internal surface.