Patent ID: 6055402
Filing Date: 2000-04-25
Classification: G03G

Abstract:
A device for developing an electrostatic latent image located on a movable image carrier using al non-conductive single-component toner, the device comprising:a toner feed device for transporting toner particles from a toner reservoir and charging them electrically, the toner particles having an average diameter of between about 5 and 15 .mu.m;a rotationally-mounted developing roller having a developing roller surface, the developing roller for receiving the charged toner particles from the toner feed device and for transporting the toner particles into a first gap between the developing roller and the image carrier; anda rotationally-mounted doctor roller having a doctor roller surface, the doctor roller arranged in the path of the toner particles from the toner feed device to the developing roller, the doctor roller for producing a uniform toner layer with a defined thickness on the developing roller,the developing roller surface and the doctor roller surface being separated from one another by a second gap, the second gap being wider than an average diameter of the toner particles and having a dimension of between about 15 and 50 .mu.m.