| 摘要 |
Ink duct assembly for offset or letterpress printing machines having an ink duct and a duct roller defining an ink gap therebetween and an ink metering unit for adjusting the ink gap, respectively, zonewise in axial direction of the duct roller, including an elastic foil, the ink metering unit being engageable through the intermediary of the elastic foil with the duct roller, the elastic foil covering the ink metering unit and being removably fastened to the ink duct at an upper edge thereof and means for tangentially displacing the elastic foil relative to the duct roller to a position wherein a new and unworn part of the surface of the elastic foil engages with the duct roller. |
