Abstract: A double-sided image formation system comprises two image formation sections wherein images are supported and transported on image support transporters, for transferring the images on the image support transporters to both sides of a recording medium and forming the images thereon, density sensing means (color sensing means), when sensing the image density (color) in one image formation section, for sensing the density (color) of the image transferred from one image formation section to the image support transporter in the other image formation section, and density adjustment means (color adjustment means) for matching the image density (color) in one image formation section with that in the other.

Abstract: A double-sided image forming method is disclosed which comprising; a first image primary transfer step (A) for transferring a first image (T1) carried by a first image carrier (1) to a first intermediate transfer member (2); a second image primary transfer step (B) for transferring a second image (T2) carried by a second image carrier (3) to a second intermediate transfer member (4); and a secondary image transfer step (C) for secondarily transferring the primarily transferred images (T1) and (T2) from the respective intermediate transfer members (2) and (4) to both sides of recording material (5), in the area where the first intermediate transfer material (2) and the second intermediate transfer material (4) come into contact with or in proximity to each other.

Abstract: A device for use with a copying machine, printer or the like transports toner from a toner storage means into the developing unit of the copying machine or printer by way of a toner transporting path including a shaft with a spiral. A toner lump loosening arrangement for loosening toner lumps before delivery to the developing unit is also positioned along the toner transporting path.