| 摘要 |
PURPOSE:To prevent the photographic ground fogging of an image and to obtain a stable copied image by using a aventurine finished member which supplies toner to a fur brush, and increasing the amount of supply toner and the amount of toner charge. CONSTITUTION:A fur brush roller 24 for development is provided with a urethane layer 26, a conductive adhesive layer 27, and a fur body 26 around the external circumferential surface of a mandrel 25. A roller 29 for toner supply, on the other hand, is constituted by working the surface of a columnar body made of a metallic material by aventurine finish and then coating the surface with ''Teflon ''. A nonmagnetic toner is carried by the roller 29 for toner supply from a toner supply opening 36 in a casing 37 and then supplied to the fur brush roller 24 for development. Undeveloped toner sticks to the surface of a toner recovery roller 31 and is then scraped off with a blade 32. Further, the internal surface of the casing 37 is embossed at a part 38 to improve charge by friction. |
