Patent ID: 7403726
Filing Date: 2008-07-22
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a first image bearing member; a first charger for electrically charging said first image bearing member; a first developer carrying member for carrying a first color developer to develop an electrostatic image formed on said first image bearing member with the first color developer; a first voltage source for applying a first oscillating voltage to said first developer carrying member; a second image bearing member; a second charger for electrically charging said second image bearing member; a second developer carrying member for carrying a second color developer to develop an electrostatic image formed on said second image bearing member with the second color developer; a second voltage source for applying a second oscillating voltage to said second developer carrying member; a third voltage source for applying a common DC voltage to said first charger and to said second charger, wherein a frequency of said first oscillating voltage and a frequency of said second oscillating voltage are substantially the same.