Oki OKIPAGE 10e Service Manual page 40

(4) Developing
Toner is attracted to the electrostatic latent image on the image drum surface, converting it into a visible toner image.
Developing takes place through the contact between the image drum and the developing roller.
1 As the toner supply roller rotates while rubbing on the developing roller, a friction charge is generated between the
developing roller and the toner, allowing the toner to be attracted to the developing roller (the developing roller surface is
charged positive and the toner, negative).
2 The toner attracted to the developing roller is scraped off by the doctor blade, forming a thin coat of toner on the
developing roller surface.