Fitzpatrick, Cella, Harper & Scinto
Development density adjusting method for image forming apparatus
 The present invention relates to a development density adjusting method in which development density is adjusted by varying ratio of application time of a voltage having the first voltage value to application time of a voltage having the second voltage value in one period, and difference between a potential of the developer bearing member and a potential of the electrostatic latent image, when the voltage having the first voltage value is applied to the developer bearing member. 
Canon Kabushiki Kaisha
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G03G G03G
additional inventional
Hiroshi Yasushi Satoru Akira Gaku Keiji Masanobu
Satoh Shimizu Motohashi Domon Konishi Okano Saito