IMAGE FORMING APPARATUS,申请号JP20000380722-传众专利搜索

IMAGE FORMING APPARATUS

申请公布号：JP2002182470(A)

申请号：JP20000380722

申请日期：2000.12.14

申请公布日期：2002.06.26

申请人：

RICOH CO LTD

发明人：UMEZAWA NOBUHIKO;ABE YOSHIHIRO

分类号：G03G21/00;G03G15/00;G03G15/08

主分类号：G03G21/00

摘要：PROBLEM TO BE SOLVED: To suppress power consumption and to prevent the unevenness of image density caused by the fluctuation of the rotating sped of a developer carrier by stopping a developer layer regulating roller at the time of developing and rotating it with the reversely rotating developer carrier at the time development is not being performed. SOLUTION: At the time no development is being made, a developing roller 11 is rotated in a reverse direction (hereinafter referred to as reverse rotation) to the rotating direction at the time of development, and the regulating roller 14 is rotated with the developing roller at such a time. At the time of development, the rotation of the regulating roller is stopped. Thus, the power consumption required to drive and rotate the regulating roller is suppressed, and further space saving is realized than the case a dedicated driving device is provided. Then, the fluctuation of the rotating speed caused when the regulating roller is rotated in a counter direction to the development roller is suppressed at the time of forming an image, and the unevenness of the image density caused by the fluctuation is prevented.