Abstract: An image forming apparatus includes a developer storage portion for storing developer. The image forming apparatus further includes a developer supply portion for supplying developer through an opening portion of the developer storage portion. When a closing member is attached to the developer storage portion for closing the opening portion, the developer supply portion is separated from the developer storage portion.

Abstract: A medium ejection device includes an ejection member, a stacking member and a rib. The ejection member ejects a medium toward a medium ejection direction. The stacking member stacks the medium ejected from the ejection member. The rib is disposed in a substantially up and down direction, and is contacted by a tailing end of the medium ejected from the ejection member. The rib includes a convex portion protruding toward the stacking member in an upper portion thereof.

Abstract: A medium ejection device includes an ejection member, a stacking member and a rib. The ejection member ejects a medium toward a medium ejection direction. The stacking member stacks the medium ejected from the ejection member. The rib is disposed in a substantially up and down direction, and is contacted by a tailing end of the medium ejected from the ejection member. The rib includes a convex portion protruding toward the stacking member in an upper portion thereof.

Abstract: An image forming apparatus includes a developer storage portion for storing developer. The image forming apparatus further includes a developer supply portion for supplying developer through an opening portion of the developer storage portion. When a closing member is attached to the developer storage portion for closing the opening portion, the developer supply portion is separated from the developer storage portion.

Abstract: A belt unit for use in an image forming apparatus includes a first roller driven by a drive source in rotation and a second roller having a circumferential surface covered with a resin material. An endless belt is entrained about the first and second rollers. When the first roller rotates, the endless belt runs about the first roller and the second roller. The second roller includes segments that can be assembled together so that the segments can rotate together about a same rotational axis. The at least one of the plurality of rollers is a driven roller that is not coupled to the drive source. Each segment is a molded hollow cylinder having an axial length shorter than 150 mm. Each segment has an inner hollow cylinder through which a shaft extends. The second roller may be rotatable relative to the shaft or together with the shaft.

Abstract: A belt unit for use in an image forming apparatus includes a first roller driven by a drive source in rotation and a second roller having a circumferential surface covered with a resin material. An endless belt is entrained about the first and second rollers. When the first roller rotates, the endless belt runs about the first roller and the second roller. The second roller includes segments that can be assembled together so that the segments can rotate together about a same rotational axis. The at least one of the plurality of rollers is a driven roller that is not coupled to the drive source. Each segment is a molded hollow cylinder having an axial length shorter than 150 mm. Each segment has an inner hollow cylinder through which a shaft extends. The second roller may be rotatable relative to the shaft or together with the shaft.