| 摘要 |
PROBLEM TO BE SOLVED: To obtain an image forming device constituted so that an excellent image can be formed without causing fogging and lowering image density when a developing action is executed under an alternating electric filed in the cause that it is provided with a photoreceptor drum constituted so that the volume resistivity of the surface layer for injecting and electrifying thereof is adjusted to be about 10<9> -10<13>Ω.cm. SOLUTION: Such a process that a voltage V1 (V) giving force to toner so that it is advanced toward a developing sleeve from the photoreceptor drum is impressed on the developing sleeve in T1 (second) and such a process that a voltage V2 giving the force to the toner so that it is advanced to the photoreceptor drum from the developing sleeve in T2 (second) are alternately and repeatedly executed. Thereafter, a voltage V3 is set so as for satisfy the relation of V3 =1/2.(V1 +V2 ) and impressed in T3 (second). Besides, T1 , T2 and T3 are set so as to satisfy the relation of 5×10<-5> <T1 <1×10<-4> (second), 5×10<-5> <T2 <1×10<-4> (second) and T1 +T2 <T3 <5.(T1 +T2 ) (second). |
