An image forming apparatus includes a photosensitive drum to which an electrostatic image is formed and a developing sleeve carrying a developer including toner carrier. An alternating voltage is applied to the sleeve to form an alternating electric field between the sleeve and the drum to develop the electrostatic image with the developer. A relation |K1|<|K2| is satisfied, where K1: a slope at an electric field intensity Ed=|(Vp2-VL)/D|, K2: a slope at an electric field intensity Eb=|(Vp1-VL)/D|, VL: a potential [V] of the electrostatic image at which a maximum density is obtained, Vp1: a peak potential [V] that provides a potential difference to move the toner toward the drum, Vp2: a peak potential [V] that provides a potential difference to move the toner toward the sleeve, and D: a closest distance [m] between the drum and the sleeve.

 
Web www.patentalert.com

< Image forming apparatus with reflective type determination unit to determine a predetermined attribute of the recording material

< Image forming apparatus with a toner image density feature and related method

> Process cartridge having electrical contact and image forming apparatus having electrical contact in urging member

> Image heating device with cooling air circulation

~ 00606