| 摘要 |
PURPOSE:To enable a magnetic toner to exhibit comparatively low resistance in developing and comparatively high resistance in transfer, and to be used for one- and two-component type developers, by allowing magnetic bodies to have a fixed orientation in toner particles and to be present in a concentrated state. CONSTITUTION:A magnetic coating is applied to a resinous sheet film, and subjected to orientation treatment, and a resin is coated on the magnetic layer formed thus to form a resin layer. This is cut, pulverized, and classified to form magnetic toner 1 having a sandwitch structure of magnetic layer 1a consisting mainly of magnetic bodies interposed with resin layers 1b. In developing, the exposed parts of layer 1a of toner 1 are attracted magnetically onto developing sleeve 2, layer 1a is erected vertically on sleeve 2, each toner particle is connected in one direction from sleeve 2 toward photoreceptor 3. On the other hand, during toner 1 is moved from a developing section to a transfer section, each toner particle rotates by an angle of about 90 deg. by magnetic attraction among each other on photoreceptor 3 and well transferred onto transfer paper 4 with transfer charger 5.
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