A developing device for transferring toner particles to a photoconductor comprises a container for holding a developer of non-magnetic toner particles and hard magnetic carrier particles, a first developer roller which is at least partially arranged in said container and features a non-magnetic jacket tube and a magnetic core, the jacket tube and the magnetic core each being arranged so as to be rotatable about corresponding rotational axes, and at least a second developer roller which is arranged adjacent to the first developer roller in such a manner that carrier particles with toner particles adhering to them and being carried along by rotation of the first developer roller, contact the second developer roller in order to transfer the toner particles in a contacting manner to the second developer roller, said second developer roller being supported so as to be rotatable about a corresponding rotational axis. There are provided at least one drive unit for rotating the jacket tube, the magnetic core and the second developer roller, each about its respective rotational axis, as well as means for generating an alternating voltage field adjacent to the second developer roller in the region of an adjacent photoconductor. In a method for generating a toner image on a photoconductor, a charge image is first formed on the photoconductor and, subsequently, toner is applied, correspondingly to the charge image, to the photoconductor by way of a developing device. When the toner is being applied, the toner particles are triboelectrically charged in a developer of non-magnetic toner particles and hard magnetic carrier particles, the carrier particles with toner particles adhering to them are brought into contact with and transported by a first developer roller comprising a rotating non-magnetic jacket tube and a magnetic core rotating inside said jacket tube, the toner particles are transferred to a second developer roller arranged adjacent to the first developer roller and rotated in such a manner that carrier particles with the toner particles adhering to them contact the second developer roller, the photoconductor is moved at a prespecified distance along the rotating second developer roller, an alternating voltage field is generated in the region between the second developer roller and the photoconductor in order to generate via this means a cloud of toner particles in this region, and the toner particles are attracted to the photoconductor corresponding to the charge image.