| 摘要 |
PURPOSE:To obtain a high-quality picture in a wide range of the temperature environment, by burying the mold releasing fine particles into the surface of a toner holding member that holds an insulating toner charged by friction. CONSTITUTION:The mold releasing fine particles are buried into the surface a nonmagnetic cylinder 4b which is provided opposite to a holder 1 for an electrostatic image. With rotation of the cylinder 4b, the unicomponent insulating toner given from a developer container 12 is held on the surface of the cylinder 4b by the friction charging. In addition, the toner layer is controlled to a small and even thickness by a doctor blade 10. Thus the uniform toner coating property is always ensured on the surface of the cylinder 4b without causing any unevenness of the toner coated layer and even in a wide range of the temperature environment by burying the mold releasing fine particles into the surface of the cylinder. As a result, a high-quality picture is obtained. |
