DEVELOPER CARRIER AND ITS MANUFACTURE

PURPOSE:To reduce the weight by laminating a rubber-magnet layer of a mixed material consisting of rubber and a magnetic material, an elastic dielectric layer of rubber and an electrode layer contg. electrically conductive particles in a dielectric adhesive on an electrically conductive support. CONSTITUTION:A metallic core 4 of Al, stainless steel or the like is fixed on a rotating shaft 4a, and the core 4 is coated with a layer of composite rubber prepd. by mixing rubber with a magnetic material such as ferrite to form a rubber-magnet laye 5. An elastic dielectric layer 6 of an elastic dielectric substance such as rubber is formed on the layer 5, and an electrode layer 7 contg. a number of electrically conductive hemispherical particles 7a in a dielectric adhesive 7b as tinyl electrodes is formed on the layer 6. The surface of the layer 7 is smoothly finished, the particles 7a are arranged so that the bottoms are brought into contact with the surface of the layer 6, and the thickness t7A of the electrodes is made equal to the thickness t7 of the electrode layer. Since the lightweight magnet formed with rubber as a medium, the dielectric layer and the electrode layer are laminated on the same support as one united body, the assembling work efficiency is improved, and the cost is considerably reduced.