2–4COPYING PROCESSCOPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)F. Step 4 (development)Figure 2-109E. Step 3 (image exposure)Figure 2-107In this step, the optical image of an original isprojected on the photosensitive drum to neutralizethe charges in thelight areas.Figure 2-108As shown in Figure 2-108, the developing as-sembly consists of a fixed magnet, a cylinder thatrotates around the magnet, and a rubber blade.The toner is a one-component toner whosemain ingredient is magnetic resins.The toner has insulating characteristics andbecomes positively charged by friction against therubber blade, which remains in contact under pres-sure with the cylinder; the toner is evened out toform a thin layer on the cylinder owing to theelasticity of the rubber.Toner BladeCylinderMagnetDevelopingcylinderBladeMagnetTonerMagnetOptical imageDark Light area
