# US 2018/0022114 A1 · Drying device, control device, and drying method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0022114 A1 - Document ID: US20180022114A1 - Status: Published application - Kind: A1 - Application number: 15/652,478 - Filed: 2017-07-18 - Published: 2018-01-25 - Earliest claimed: 2016-07-20 - Assignees: Ricoh Company, Ltd. - Inventors: Wataru SAKAMOTO; Toshihiro YOSHINUMA - Web page: https://patentgrep.com/patent/US20180022114A1 ## CPC - B41J 11/00242: {Controlling the temperature of the conduction means} - B41F 23/0459: {by conduction, e.g. using heated rolls} - B41F 23/0486: {Particular types of dryers} - B41J 11/0095: {Detecting means for copy material, e.g. for detecting or sensing presence of copy material or its leading or trailing end} - B41M 7/00: After-treatment of prints, e.g. heating, irradiating, {setting of the ink, protection of the printed stock (pre-treatment or treatment during printing B41M5/0011; printers for treating or overcoating copy materials before, during or after printing B41J11/0015)} - F26B 3/18: by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact - F26B 13/08: using rollers - F26B 13/18: heated {or} cooled, {e.g. from inside, the material being dried on the outside surface by conduction} - G03G 15/2053: {Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating} - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS - B41F: PRINTING MACHINES OR PRESSES (manifolding devices or office printing machines B41L) - B41M: PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING, (correction of typographical errors B41J; processes for applying transfer pictures or the like B44C1/16; fluid media for correction of typographical errors by coating C09D10/00; printing textiles D06P) - F26B: DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM (drying devices for combines A01D41/133; racks for drying fruit or vegetables A01F25/12; drying foodstuffs A23; drying hair A45D20/00; body-drying implements A47K10/00; drying household articles A47L; drying gases or vapours B01D; chemical or physical processes for dewatering or like separating liquids from solids B01D43/00; centrifugal apparatus B04; drying ceramics C04B33/30; drying yarns or fabrics in association with some other form of treatment D06C; drying frames for laundry without heating or positive air circulation, domestic laundry-or spin-driers, wringing or hot pressing laundry D06F; furnaces, kilns, ovens F27) - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY ## Abstract A drying device includes a roller, and the drying device is for drying a recording medium conveyed by rotation of the roller. The drying device includes a first heating source and second heating source included inside the roller; first and second temperature detectors for respectively detecting a temperature of a first region on a surface of the roller and a temperature of a second region on the surface of the roller; and a heating controller that controls heating and termination of the heating by the first heating source and/or the second heating source, wherein, upon detecting that a temperature of one region of the first region and the second region is higher than or equal to a predetermined temperature, the heating controller terminates heating by one heating source corresponding to the other region. ## Claims ### Claim 1 A drying device provided with a roller, wherein the drying device is for drying a recording medium conveyed by rotation of the roller, the drying device comprising: a first heating source and second heating source that are included inside the roller; a first temperature detector configured to detect a temperature of a first region on a surface of the roller, the first region being heated by the first heating source; a second temperature detector configured to detect a temperature of a second region on the surface of the roller, the second region being heated by the second heating source; and a heating controller configured to control heating and termination of the heating by the first heating source and/or the second heating source, wherein, upon detecting that a temperature of one region of the first region and the second region is higher than or equal to a predetermined temperature, the heating controller is configured to terminate heating by one heating source of the first heating source and the second heating source, the one heating source corresponding to the other region. ### Claim 2 (depends on 1) The drying device according to claim 1, wherein the first heating source and the second heating source are arranged so that a width from one end part of end parts of a first light emitting region of the first heating source close to one edge of the roller to another one end part of end parts of a second light emitting region of the second heating source close to the other edge of the roller is greater than or equal to a maximum width of the recording medium. ### Claim 3 (depends on 1) The drying device according to claim 1, wherein the drying device includes a plurality of sets, each of the plurality of sets including the roller, the first temperature detector, and the second temperature detector, the first heating source and the second heating source being included inside the roller. ### Claim 4 (depends on 1) The drying device according to claim 1, wherein upon detecting that the temperature of the one region of the first region and the second region is higher than or equal to a target temperature, the target temperature being lower than the predetermined temperature, the heating controller is configured to terminate heating or to reduce a quantity of heat generated by the other heating source of the first heating source and the second heating source, the other heating source corresponding to the one region. ### Claim 5 (depends on 1) The drying device according to claim 1, wherein the drying device includes a plurality of the rollers arranged in an order from an upstream side in a direction of conveyance of the recording medium, wherein, upon detecting that the temperature of the one region of the first region and the second region is higher than or equal to the predetermined temperature, for a predetermined number of the rollers of the plurality of rollers in the order from the upstream side in the direction of the conveyance of the recording medium, the heating controller is configured to terminate heating by the one heating source of the first heating source and the second heating source, the one heating source corresponding to the other region. ### Claim 6 (depends on 5) The drying device according to claim 5, wherein the plurality of the rollers are configured so that quantities of heat that can be supplied by the respective plurality of heating rollers are sequentially reduced in the order from the upstream side in the direction of the conveyance of the recording medium. ### Claim 7 (depends on 1) The drying device according to claim 1, wherein the first heating source overlaps the second heating source in a direction of an axis of the roller. ### Claim 8 A control device for controlling a drying device including a roller, a first heating source and a second heating source being included inside the roller, wherein the drying device is for drying a recording medium conveyed by rotation of the roller, the control device comprising: a temperature obtaining unit configured to obtain a temperature of a first region and a temperature of a second region, wherein the temperature obtaining unit is configured to obtain the temperature of the first region from a first temperature detector configured to detect the temperature of the first region on a surface of the roller, the first region being heated by the first heating source, and wherein the temperature obtaining unit is configured to obtain the temperature of the second region from a second temperature detector configured to detect the temperature of the second region on the surface of the roller, the second region being heated by the second heating source; and a heating controller, wherein, upon detecting that a temperature of one region of the first region and the second region is higher than or equal to a predetermined temperature, the heating controller is configured to terminate heating by one heating source of the first heating source and the second heating source, the one heating source corresponding to the other region. ### Claim 9 A drying method executed in a drying device, wherein the drying device includes a roller, a first heating source and a second heating source being included inside the roller, wherein the drying device is for drying a recording medium conveyed by rotation of the roller, the drying method comprising: obtaining, by the drying device, a temperature of a first region and a temperature of a second region, wherein the temperature of the first region is obtained from a first temperature detector for detecting the temperature of the first region on a surface of the roller, the first region being heated by the first heating source, and wherein the temperature of the second region is obtained from a second temperature detector for detecting the temperature of the second region on the surface of the roller, the second region being heated by the second heating source; and upon detecting that a temperature of one region of the first region and the second region is higher than or equal to a predetermined temperature, terminating, by the drying device, heating by one heating source of the first heating source and the second heating source, the one heating source corresponding to the other region.