| 摘要 |
PURPOSE:To prevent separation of an abrasive even by stirring for a long time, to keep the surface of a photosensitive drum in a state free from paper powder, oxide, and the like, and to obtain images always good in quality by burying the abrasive in the surface of an original toner composed mainly of a resin. CONSTITUTION:The resin chips, a powdery colorant, and other additives are uniformly mixed, mildly heated to convert the mixture into a softened state, and kneaded. The product is cooled and pulverized to about 10mum to form the original toner 7a, and magnetite of about 1mum particle diameter is mixed as the abrasive 7b to attach it to the surface of the original toner 7a, and buried in the surface of the original toner 7a by applying pressure to it, thus permitting the abrasive particle not to be separated from the surface of the original toner 7a even by stirring for a long time, accordingly, the original toner 7a together with the abrasive 7b to attach to the photosensitive drum, and paper powder, dust, oxide, and the like attaching to the surface of the drum to be scraped down. |
