Importance

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Abstract

A belt feeding device includes a movable endless belt including a preventing guide provided through one-full circumference at each of end portions of the belt with respect to a widthwise direction perpendicular to a movement direction of the belt, and includes a plurality of rotatable rollers including a driving roller and a tension roller. The driving roller moves the belt by being rotationally driven about a rotational axis of which direction is fixed, and includes a tapered portion, at each of end portions thereof with respect to a rotational axis direction, which narrows in diameter from a central portion toward the end portion with respect to the rotational axis direction and which contacts the preventing guide. The tension roller rotates about a swingable rotational axis and a length of the tension roller is such that the belt during traveling is prevented from contacting the preventing guide.

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First Claim