Patent ID: 6075964
Filing Date: 2000-06-13
Classification: G03G

Abstract:
An image forming method for developing an electrostatic latent image on a moving image-bearing member with a magnetic developer and for removing the residual toner after transfer of a developed toner image onto a transfer member, comprising:providing a rotatable, cylindrical permanent magnet having a plurality of magnetic poles on the surface for supporting and conveying said magnetic developer directly on the magnet surface;forming an electrostatic latent image into a toner image by attracting and conveying a magnetic developer including a nonspherical magnetic toner obtained by polymerization or a nonspherical magnetic or non-magnetic toner obtained by polymerization and magnetic carriers; andremoving the residual toner remaining on the image-bearing member after transferring this toner image by a cleaning blade, wherein:letting Vp (mm/s) be the moving speed of the image-bearer, and D (mm), M, and Vm (mm/s) be the outer diameter, the number of magnetic poles, and peripheral speed of the permanent magnet, respectively,a value of h, defined as .pi.D.multidot.Vp/(M.multidot.Vm), has a value of 2 or less, andthe surface magnetic flux density ranges from 50 to 1200 G.