CHAPTER 1 GENERAL DESCRIPTIONCOPYRIGHT © 1997 CANON INC. CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) 1-25F. Development (step 4)Figure 1-608As shown in Figure 1-608, the developing assembly consists of a developingcylinder made of a fixed magnet and a cylinder that rotates around it and a magneticblade.The copier’s developer is a single-component developer made of magnetic resins.The developer has insulating characteristics and becomes charged to a positivepotential by friction against the rotating cylinder.Figure 1-609A concentrated magnetic field exista at all times from the magnet to the tip of theblade, attracting the developer.Once inside the concentrated magnetic field, its strong bond to the blade will keepit virtually immobile, causing it to deposit in an even layer on the cylinder.Both AC bias and DC bias (negative component) are simultaneously applied to thedeveloping cylinder and the blade (developing bias), and the negative component of thedeveloping bias is larger than the positive component.DevelopingcylinderToner BladeCylinderMagnetMagnetBladeConcentratedmagnetic fieldMagnetToner
