| 摘要 |
PURPOSE:To prevent scratch and wear of a developing sleeve and tip magnetic substance, by fitting a non-magnetic spacer rotatably around the tip magnetic substance, to the tip of non-magnetic developing scraper having a number of windows having magnetic substance at the tip. CONSTITUTION:A scraper 8 is provided by opposing to a developing sleeve 1 between a development end position and a position of the end of supply of next development. In the scraper, a magnetic wire or plate 8b such as piano wire or stainless steel is bonded to the tip of comb type non-magnetic substance. To each window 9 of the scraper of the tip, a spacer 12 made of a spring coil, 0.15-0.3mm. in diameter is fitted. The spacer can be a tube, 0.15-0.3mm. in thickness. The spacer is needed as one at minimum and when one spacer is used, it can be fitted at the center of scraper. |
