# US 12,032,314 B2 · Image forming system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,032,314 B2 - Document ID: US12032314B2 - Status: Granted - Kind: B2 - Application number: 17/929,901 - Filed: 2022-09-06 - Published: 2023-03-09 - Granted: 2024-07-09 - Earliest claimed: 2021-09-06 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Naoyuki Yamamoto - Web page: https://patentgrep.com/patent/US12032314B2 ## CPC - G03G 15/221: {Machines other than electrographic copiers, e.g. electrophotographic cameras, electrostatic typewriters} - G03G 15/6585: {by using non-standard toners, e.g. transparent toner, gloss adding devices} - G03G 2215/00801: Coating device - G03G 2215/0081: Gloss level being selectable - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY ## Abstract An image forming system includes an image forming unit, a varnish coating unit, a reception unit, and a control unit. The image forming unit executes an image forming process of forming an image on types of recording media including a first type of recording medium with a coated layer and a second type of recording medium without a coated layer. The varnish coating unit executes a varnish coating process of varnish coating a recording medium on which an image is formed by the image forming unit. The reception unit receives a printing job from a user. The control unit controls the varnish coating unit. When the printing job received by the reception unit is a printing job for executing the varnish coating process on the second type of recording medium, the control unit controls the varnish coating unit to prevent the varnish coating unit from executing the varnish coating process. ## Claims ### Claim 1 An image forming system comprising: an image forming unit configured to execute an image forming process of forming an image on recording media; a varnish coating unit configured to execute a varnish coating process of coating, with varnish, a recording medium on which the image is formed by the image forming unit; a reception unit configured to receive a printing job; and a control unit configured to control the varnish coating unit, wherein, upon receiving the printing job, the control unit determines whether or not to execute the varnish coating process, and, upon determining to execute the varnish coating process, the control unit determines whether the recording medium is a first type of recording medium with a coated layer or a second type of recording medium, without a coated layer and causes the varnish coating unit to execute the varnish coating process in a case where the recording medium is the first type of recording medium or causes the varnish coating unit not to execute the varnish coating process in a case where the recording medium is the second type of recording medium. ### Claim 2 (depends on 1) The image forming system according to claim 1, further comprising a display unit including a display screen, wherein, upon determining to execute the varnish coating process, in a case where the recording medium is the second type of recording medium, the control unit causes the display unit to display a warning. ### Claim 3 (depends on 1) The image forming system according to claim 1, wherein, upon determining to execute the varnish coating process, in a case where the recording medium is the second type of recording medium, the control unit controls to cancel the printing job received by the reception unit. ### Claim 4 (depends on 1) The image forming system according to claim 1, wherein, upon determining to execute the varnish coating process, in a case where the recording medium is the first type of recording medium and the recording medium is a third type of recording medium having a basis weight that is greater than or equal to a predetermined value of a basis weight of the first type of recording medium, the control unit controls to allow execution of the varnish coating process, and wherein, in a case where the printing job received by the reception unit is a printing job for executing the varnish coating process on the first type of recording medium and the recording medium is a fourth type of recording medium having a basis weight that is smaller than the predetermined value, the control unit causes the varnish coating unit not to execute the varnish coating process. ### Claim 5 (depends on 4) The image forming system according to claim 4, wherein the reception unit is configured to receive a thickness of a varnish layer in the varnish coating process, wherein, upon determining to execute the varnish coating process, in a case where the recording medium is the fourth type of recording medium and the thickness of the varnish layer in the varnish coating process is smaller than a predetermined thickness, the control unit controls to allow execution of the varnish coating process, and wherein, in a case where the printing job received by the reception unit is a printing job for executing the varnish coating process on the fourth type of recording medium and the thickness of the varnish layer in the varnish coating process is greater than or equal to the predetermined thickness, the control unit causes the varnish coating unit not to execute the varnish coating process. ### Claim 6 (depends on 1) The image forming system according to claim 1, wherein the varnish coating unit includes (i) a coating roller configured to coat the recording medium with varnish, and (ii) an opposing roller configured to convey the recording medium together with the coating roller. ### Claim 7 (depends on 1) The image forming system according to claim 1, wherein the varnish coating unit includes a line head configured to discharge varnish onto the recording medium. ### Claim 8 (depends on 1) The image forming system according to claim 1, wherein a first conveying path, where the varnish coating process is executed by the varnish coating unit, and a second conveying path, where the varnish coating process is not executed are provided, and wherein, upon determining to execute the varnish coating process, in a case where the recording medium is the second type of recording medium, the control unit controls to convey, to the second conveying path, the recording medium on which the image has been formed by the image forming unit. ### Claim 9 (depends on 1) The image forming system according claim 1, wherein the first type of recording medium is a recording medium with a coated layer having a coating amount of 20 g/m2 to 40 g/m2. ### Claim 10 (depends on 1) The image forming system according claim 1, wherein the first type of recording medium is a recording medium with a coated layer having a coating amount of 12 g/m2 to 40 g/m2.