# US 2013/0278666 A1 · Image recording apparatus, iamge recording method, program and program recording medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0278666 A1 - Document ID: US20130278666A1 - Status: Published application - Kind: A1 - Application number: 13/865,455 - Filed: 2013-04-18 - Published: 2013-10-24 - Earliest claimed: 2012-04-24 - Assignees: Seiko Epson Corporation - Applicants: Seiko Epson Corporation - Inventors: Naoki HORI - Web page: https://patentgrep.com/patent/US20130278666A1 ## CPC - B41J 15/16: Means for tensioning or winding the web - B41J 15/165: {for tensioning continuous copy material by use of redirecting rollers or redirecting nonrevolving guides} - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS ## Abstract An image recording apparatus includes a recording unit that records an image in a first region, a first control unit that has a drive roller to transport a recording medium and controls a tension of the recording medium in the first region by adjusting a torque of the drive roller based on the tension of the recording medium in the first region, a second control unit that controls the tension of the recording medium in a second region according to the detection result of the tension of the recording medium in the second region. Compared to the frequency response characteristics of the first control unit with respect to the tension fluctuations generated in the first region, the frequency response characteristics of the second control unit with respect to the tension fluctuations generated in the second region responds to the tension fluctuations having a higher frequency band. ## Claims ### Claim 1 An image recording apparatus comprising: a recording unit that records an image on a recording medium in a first region; a first control unit that has a drive roller to transport the recording medium, and that controls a tension of the recording medium in the first region by adjusting a torque of the drive roller based on a detection result of the tension of the recording medium in the first region; and a second control unit that controls the tension of the recording medium in a second region according to the detection result of the tension of the recording medium in the second region which is in an opposite side interposing the recording unit between the drive rollers; wherein, compared to the frequency response characteristics of the first control unit with respect to the tension fluctuations generated in the first region, the frequency response characteristics of the second control unit with respect to the tension fluctuations generated in the second region respond to the tension fluctuations having a higher frequency band. ### Claim 2 (depends on 1) The image recording apparatus according to claim 1, wherein the tension of the recording medium in the second region has a periodic fluctuation component in which the tension fluctuates periodically. ### Claim 3 (depends on 2) The image recording apparatus according to claim 2, wherein the frequency response characteristics of the first control unit do not respond with respect to the tension fluctuations with the frequency of the periodic fluctuation component. ### Claim 4 (depends on 2) The image recording apparatus according to claim 2, wherein the frequency response characteristics of the second control unit respond with respect to the tension fluctuations with the frequency of the periodic fluctuation component. ### Claim 5 (depends on 2) The image recording apparatus according to claim 2, wherein the drive roller transports the recording medium from the first region to the second region, wherein the apparatus further comprises a roll shaft that rotates and rolls the recording medium in the second region, and wherein the tension of the recording medium in the second region has a periodic fluctuation component in which the tension fluctuates in a rotation period of the roll shaft. ### Claim 6 (depends on 2) The image recording apparatus according to claim 2, wherein the drive roller transports the recording medium from the second region to the first region, wherein the apparatus further comprises a feeding shaft that rotates and feeds the recording medium in the second region, and wherein the tension of the recording medium in the second region has a periodic fluctuation component in which the tension fluctuates in a rotation period of the feeding shaft. ### Claim 7 (depends on 1) The image recording apparatus according to claim 1, further comprising: a driven rotary member which comes in contact with the recording medium on which the image is formed on the recording unit in the first region and rotates by being driven by the transported recording medium. ### Claim 8 (depends on 7) The image recording apparatus according to claim 7, wherein the first control unit detects the tension of the recording medium, between the driven rotary member and the drive roller. ### Claim 9 (depends on 1) The image recording apparatus according to claim 1, wherein the first control unit controls the tension of the recording medium in the first region by performing only an integral action among the integral action, a proportional action and a differential action, with respect to the detection result of the tension fluctuations of the recording medium, and wherein the second control unit controls the tension of the recording medium in the second region by performing other than the integral action with respect to the detection result of the tension fluctuations of the recording medium. ### Claim 10 (depends on 1) The image recording apparatus according to claim 1, wherein the first control unit includes a filter that transfers only a frequency band with the frequency equal to or less than the predetermined value, to a feedback loop which returns the detection result of the tension fluctuations of the recording medium to the torque of the drive roller. ### Claim 11 An image recording method in which an image is recorded on a recording medium, the method comprising: first controlling a tension of the recording medium in a first region by adjusting a torque of the drive roller which transports the recording medium based on a detection result of a tension of the recording medium in a first region where an image recording is performed on the recording medium; second controlling the tension of the recording medium in a second region according to the detection result of the tension of the recording medium in a second region which is in an opposite side interposing the recording unit with respect to the drive roller; wherein, compared to the frequency response characteristics represented by the tension control in the first controlling with respect to the tension fluctuations generated in the first region, the frequency response characteristics represented by the tension control in the second controlling with respect to the tension fluctuations generated in the second region respond to the tension fluctuations having a higher frequency band. ### Claim 12 A program used for a computer that controls an image recording apparatus which records an image on a recording medium, the program causes the computer to function as: a first control unit that controls a tension of the recording medium in a first region by adjusting a torque of a drive roller which transports the recording medium based on a detection result of a tension of the recording medium in a first region where an image recording is performed on the recording medium; and a second control unit that controls the tension of the recording medium in a second region according to a detection result of the tension of the recording medium in a second region which is in an opposite side interposing the recording unit with respect to the drive roller; and causes the computer to function so that, compared to the frequency response characteristics of the first control unit with respect to the tension fluctuations generated in the first region, the frequency response characteristics of the second control unit with respect to the tension fluctuations generated in the second region respond to the tension fluctuations having a higher frequency band. ### Claim 13 (depends on 12) A program recording medium in which the program according to claim 12 is recorded and can be read by the computer.