| 摘要 |
PURPOSE:To permit development by a simultaneous method and transfer to plain paper by a corona transfer method by passing thermoplastic resin particles through a narrow spacing and rapidly cooling the same right after the passage therethrough to stick insulating resin particles partially to the surface of the thermoplastic resin particles, thereby producing a flat toner. CONSTITUTION:An image forming body 6 laminated with a photoconductive layer 3, a transparent conductor layer 4 and transparent base layer 5 in this order is subjected to image exposing 8 at the time of moving in the direction of an arrow 7. A toner layer 11 is brought into contact with the body 6 in an exposing part by a magnetic brush formed by using a magnet roller 9 and a sleeve 10 and a bias voltage is kept impressed to the sleeve 10. Electric charge is, therefore, injected into the toner in contact with the body 6 through the electric current path formed by the contact of the conductive parts in the direction 12 of the electrical conductivity by the conductive parts 1 possessed by the respective toner particles with each other. The quantity of the electric charge is different in the exposed part and the unexposed part and a difference is eventually generated in the electrostatic attraction power of the toner to the surface of the photoconductive layer, by which the image is formed. The property to permit the selective use of the insulating characteristic and the electrical conductivity is thereby realized as the toner of the simultaneous method. |
