# US 2024/0198697 A1 · Printing apparatus and control method of printing apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0198697 A1 - Document ID: US20240198697A1 - Status: Published application - Kind: A1 - Application number: 18/543,939 - Filed: 2023-12-18 - Published: 2024-06-20 - Earliest claimed: 2022-12-20 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: RYU KOBAYASHI; YUKI IGARASHI; MASATO EIYAMA - Web page: https://patentgrep.com/patent/US20240198697A1 ## CPC - B41J 11/002: {Curing or drying the ink on the copy materials, e.g. by heating or irradiating} - B41J 11/00222: {Controlling the convection means} - B41J 2/04528: {aiming at warming up the head} - B41J 2/04563: {detecting head temperature; Ink temperature} - G03G 15/2046: {specially for the influence of heat loss, e.g. due to the contact with the copy material or other roller} - G03G 15/6594: {characterised by the format or the thickness, e.g. endless forms} - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY ## Abstract A printing apparatus includes a fixing unit configured to fix an image onto a printing medium by heating the printing medium on which the image is printed, a measuring unit configured to measure a length of the printing medium after heating of the printing medium in the fixing unit, a deriving unit configured to derive a characteristic of a deformation amount of the printing medium with respect to temperature based on the measured length, a receiving unit configured to receive a specification of a deformation amount threshold, and a determining unit configured to determine a fixation temperature in fixation of the image onto the printing medium by the fixing unit, based on the derived characteristic and the received deformation amount threshold. ## Claims ### Claim 1 A printing apparatus comprising: a fixing unit configured to fix an image onto a printing medium by heating the printing medium on which the image is printed; a measuring unit configured to measure a length of the printing medium after heating of the printing medium in the fixing unit; a deriving unit configured to derive a characteristic of a deformation amount of the printing medium with respect to temperature based on the measured length; a receiving unit configured to receive a specification of a deformation amount threshold; and a determining unit configured to determine a fixation temperature in fixation of the image onto the printing medium by the fixing unit, based on the derived characteristic and the received deformation amount threshold. ### Claim 2 (depends on 1) The printing apparatus according to claim 1, wherein the receiving unit receives an input of the deformation amount threshold by a user. ### Claim 3 (depends on 1) The printing apparatus according to claim 1, wherein the receiving unit receives the specification of the deformation amount threshold selected by a user from among a plurality of the deformation amount thresholds set in advance. ### Claim 4 (depends on 1) The printing apparatus according to claim 1, wherein the receiving unit receives a specification of a type of the printing medium, and the deformation amount threshold varies depending on the type of the printing medium. ### Claim 5 (depends on 1) The printing apparatus according to claim 1, wherein the receiving unit receives a selection of a print mode, and the deformation amount threshold varies depending on the print mode. ### Claim 6 (depends on 1) The printing apparatus according to claim 1, wherein the receiving unit determines the deformation amount threshold corresponding to an item that is specified as enabled from among: an item in which an input of the deformation amount threshold by a user is receivable, an item in which specification of a type of the printing medium is receivable, and an item in which selection of a print mode is receivable. ### Claim 7 (depends on 1) The printing apparatus according to claim 1, wherein the receiving unit receives the specification through a screen configured to receive the specification. ### Claim 8 (depends on 1) The printing apparatus according to claim 1, wherein the determining unit determines the fixation temperature such that the fixation temperature is equal to or higher than a melting temperature of ink used in printing. ### Claim 9 (depends on 1) The printing apparatus according to claim 1, wherein the determining unit is configured to determine a temperature lower than a heating temperature range in the fixing unit as the fixation temperature. ### Claim 10 (depends on 1) The printing apparatus according to claim 1, wherein the image is a pattern having a predetermined length on the printing medium, and the measuring unit measures the length of the pattern printed on the printing medium by measuring reflected light from the pattern, and thereby measures the length of the printing medium. ### Claim 11 (depends on 1) The printing apparatus according to claim 1, wherein the deriving unit derives the characteristic of the deformation amount of the printing medium at each of three temperatures including a first temperature before the heating and a second temperature and a third temperature after the heating. ### Claim 12 A control method of a printing apparatus including a fixing unit configured to fix an image onto a printing medium by heating the printing medium on which the image is printed and a measuring unit configured to measure a length of the printing medium after heating of the printing medium in the fixing unit, the control method comprising: deriving a characteristic of a deformation amount of the printing medium with respect to temperature based on the length of the printing medium measured by the measuring unit; receiving a specification of a deformation amount threshold; and determining a fixation temperature in fixation of the image onto the printing medium by the fixing unit, based on the derived characteristic and the received deformation amount threshold.