Ricoh Company, Ltd.

Kazuyoshi Kondoh

Makoto Kikura

Kazuyoshi Matsumoto

Norikazu Yanase

Gaku Hosono

Yuuzoh Obata

An image forming apparatus includes an image forming device to form an image on a print medium by a reciprocation operation of a print head. There is a conveying device including a belt that holds the print medium, a fan that adsorbs air through suction holes in the belt, and a fan drive controller that drives the suction fan and adjusts power of adsorption of the suction fan. The fan drive controller performs control which makes the power of adsorption for the first reciprocation movement of the image forming device stronger than the power of adsorption for the second reciprocation movement of the image forming device.

Image forming apparatus and method which controls a power of adsorption which holds a printing medium

An image forming apparatus of the present invention includes an image transferring device for transferring a toner image from an image carrier to a recording medium and a moving device for selectively moving the image transferring device toward or away from the image carrier. The moving device moves the image transferring device toward the image carrier on the elapse of at least a period of time necessary for the image carrier to rotate from a rotation start position to a reversely rotated position. Assume that a distance between a position where the image transferring device approaches the image carrier and a position where the toner image starts being formed on the image carrier is a, that the image carrier is reversely rotated by a distance of b, that the linear velocity of the image carrier is V, and that a period of time between the start of rotation of the image carrier and image formation is c, then a period of time t necessary for the image transferring device approaches the image carrier after the start of rotation of the image carrier is satisfies a relation of (a&plus;b)/V<t<c.

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Tokyo, Japan

Kazuyoshi Kondoh