# US 10,118,418 B2 · Medium feeding apparatus, printing apparatus, and control method of medium feeding apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,118,418 B2 - Document ID: US10118418B2 - Status: Granted - Kind: B2 - Application number: 15/462,537 - Filed: 2017-03-17 - Published: 2017-10-05 - Granted: 2018-11-06 - Earliest claimed: 2016-03-31 - Assignees: Seiko Epson Corporation - Applicants: Seiko Epson Corporation - Inventors: Hiroshi Yoshida; Toru Hayashi; Ryo Hamano; Jun Ushiama - Web page: https://patentgrep.com/patent/US10118418B2 ## CPC - B41J 13/0009: {control of the transport of the copy material} - B41J 15/04: Supporting, feeding, or guiding devices; Mountings for web rolls or spindles - B41J 15/16: Means for tensioning or winding the web - B65H 20/005: {Electrical drive motor control devices therefor} - B65H 2403/942: Bidirectional powered handling device - B65H 2406/31: Suction box; Suction chambers - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS - B65H: HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES ## Abstract A medium feeding apparatus includes a roll holding portion which holds a roll body around which a printing medium is wound, a feeding roller which pulls out the printing medium from the roll body and feeds the printing medium, a roll motor which rotates the roll body held by the roll holding portion, a roll motor control portion which controls the roll motor, and rotation position detecting portions which detect a rotation position of the roll body, the roll motor control portion performs removing looseness of the printing medium pulled out from the roll body by driving the roll motor and rotating the roll body in a rewinding direction, and in the removing, driving of the roll motor is finished on the basis of movement of the rotation position detected by the rotation position detecting portions. ## Claims ### Claim 1 A medium feeding apparatus comprising: a holding portion that holds a roll body around which a medium is wound; a medium feeding portion that pulls out the medium from the roll body and feeds the medium; a roll motor that rotates the roll body held by the holding portion; a control portion that controls the roll motor; and a rotation position detecting portion that detects a rotation position of the roll body, wherein the control portion performs removing looseness of the medium pulled out from the roll body by driving the roll motor and rotating the roll body in a rewinding direction, wherein, in the removing, the control portion determines for a current interrupt period whether the rotation position equals a maximum rotation position, the maximum rotation position being a rotation position of one or more previous interrupt periods, and wherein when the rotation position equals the maximum rotation position, the control portion further determines a number of times that the rotation position continues to equal the maximum rotation position, and wherein, in the removing, driving of the roll motor is finished on the basis of movement of the rotation position detected by the rotation position detecting portion. ### Claim 2 (depends on 1) The medium feeding apparatus according to claim 1, wherein, in the removing, determination whether or not the roll body is unmoved is made by the movement of the rotation position, and when the roll body is determined to be unmoved, driving of the roll motor is finished. ### Claim 3 (depends on 2) The medium feeding apparatus according to claim 2, wherein, in the removing, when a maximum value of the detected rotation position is not changed at a certain time, the roll body is determined to be unmoved. ### Claim 4 (depends on 3) A printing apparatus comprising: the medium feeding apparatus according to claim 3; and a printing portion that performs printing on a medium being fed by the medium feeding apparatus. ### Claim 5 (depends on 4) The printing apparatus according to claim 4, wherein the control portion performs removing in every line feed operation. ### Claim 6 (depends on 2) The medium feeding apparatus according to claim 2, wherein, in the removing, determination whether or not the roll body is unmoved starts when the current rotation position of the roll body exceeds the rotation position at the time of starting the removing in the rewinding direction. ### Claim 7 (depends on 6) A printing apparatus comprising: the medium feeding apparatus according to claim 6, and a printing portion that performs printing on a medium being fed by the medium feeding apparatus. ### Claim 8 (depends on 7) The printing apparatus according to claim 7, wherein the control portion performs removing in every line feed operation. ### Claim 9 (depends on 2) A printing apparatus comprising: the medium feeding apparatus according to claim 2; and a printing portion that performs printing on a medium being fed by the medium feeding apparatus. ### Claim 10 (depends on 9) The printing apparatus according to claim 9, wherein the control portion performs removing in every line feed operation. ### Claim 11 (depends on 1) A printing apparatus comprising: the medium feeding apparatus according to claim 1; and a printing portion that performs printing on a medium being fed by the medium feeding apparatus. ### Claim 12 (depends on 11) The printing apparatus according to claim 11, wherein the control portion performs removing in every line feed operation. ### Claim 13 A control method of a medium feeding apparatus which includes a holding portion that holds a roll body around which a medium is wound, a medium feeding portion that pulls out the medium from the roll body and feeds the medium, and a roll motor that rotates the roll body held by the holding portion, the method comprising: removing the looseness of the medium pulled out from the roll body by driving the roll motor and rotating the roll body in a rewinding direction, and finishing driving of the roll motor based on movement of a rotation position of the roll body in the removing, wherein, in the removing, the control portion determines for a current interrupt period whether the rotation position equals a maximum rotation position, the maximum rotation position being a rotation position of one or more previous interrupt periods, and wherein when the rotation position equals the maximum rotation position, the control portion further determines a number of times that the rotation position continues to equal the maximum rotation position.