Image forming apparatus

An image forming apparatus comprising:

• a first roller to come into contact with a first side of a recording medium that bears an image to convey the recording medium;
• a second roller disposed opposite the first roller;
• and
• a third roller disposed opposite the first roller and aligned with the second roller in a recording medium conveyance direction,
• the second roller and the third roller to come into contact with a second side of the recording medium opposite the first side thereof to convey the recording medium,
• each of the first roller, the second roller, and the third roller including:
• a plurality of increased diameter portions, each having an increased diameter;
• and
• a plurality of decreased diameter portions, each having a decreased diameter,
• each of the plurality of increased diameter portions and each of the plurality of decreased diameter portions alternately arranged in an axial direction of each of the first roller, the second roller, and the third roller to produce an uneven outer circumferential surface thereof,
• wherein the plurality of increased diameter portions of the second roller is isolated from the plurality of increased diameter portions of the third roller, and
• wherein the plurality of increased diameter portions of the first roller is disposed opposite the plurality of decreased diameter portions of each of the second roller and the third roller, respectively, with a clearance therebetween and the plurality of decreased diameter portions of the first roller is disposed opposite the plurality of increased diameter portions of each of the second roller and the third roller, respectively, with a clearance therebetween such that the plurality of increased diameter portions of the first roller overlaps the plurality of increased diameter portions of each of the second roller and the third roller, respectively, in the recording medium conveyance direction and a direction perpendicular to the recording medium conveyance direction.