| 摘要 |
PURPOSE:To enlarge a gap between a developer holding member and an image bearing member and to enable high speed development, by jumping a developer considerably apart from the former by an alternating electric field. CONSTITUTION:Electrodes 4... driven with alternating power supplies 5-7 are installed on the member 3 for feeding the developer 8, and the developer 8 is jumped by the alternating electric field due to the electrodes 4... considerably apart from the member 3 to develop an electrostatic latent image formed on the image bearing member 1. The gap between both members 1, 3 can be enlarged, mechanical precision can be alleviated, and yet, high speed good quality development can be achieved. |
