Patent ID: 11945677
Assignee: RICOH COMPANY, LTD.
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 5:
6. An image forming method to be executed by an image forming apparatus that includes an image forming device and a sheet conveyance device, the sheet conveyance device including a sheet conveyance roller and a pressure roller configured to hold and convey a sheet between the sheet conveyance roller and the pressure roller,
the image forming method comprising:
repeatedly executing intermittent conveyance processing and image forming processing,
the intermittent conveyance processing including rotating the sheet conveyance roller to convey the sheet by a predetermined conveyance amount; and
the image forming processing including causing the image forming device to form an image on an area of the sheet having been conveyed to a position facing the image forming device by the intermittent conveyance processing;

calculating, in the intermittent conveyance processing, a correction value based on corresponding profile data for each of a plurality of positions included in a width of an image to be formed on the sheet in next image forming processing, the correction value being a difference between the predetermined conveyance amount and an actual conveyance amount, the corresponding profile data indicating a variation in conveyance amount in a circumferential direction due to eccentricity of the sheet conveyance roller;
correcting a reference amount of rotation by a representative value of a plurality of calculated correction values to calculate a corrected amount of rotation, the reference amount of rotation being an ideal amount of rotation of the sheet conveyance roller that conveys the sheet by the predetermined conveyance amount; and
rotating the sheet conveyance roller by the corrected amount of rotation calculated.