| 摘要 |
PURPOSE:To enable stable high-quality printing without using any high- concentration alcohol, by a construction wherein a damping roller group provided with a transfer roller between it and a form damping roller is combined with an in roller group, in a brush-type water supply device having the function of regulating water quantity in the longitudinal direction of rollers by a shutter. CONSTITUTION:A water feed roller 3 is rotated in synchronism with the form cylinder 7, and is oscillated in the axial direction. The transfer roller 5 is rotated by mechanical drive or drag, and is fixed or oscillated in the axial direction. Since an ink built up on the ink roller 6 has a flowing property similar to that of an ink in the ink roller system and an ink built up on a form damping roller 4 is replaced by a fresh ink supplied from the transfer roller 5, emulsification of the ink by water reaches an equilibrium condition at a fixed level, thereby stopping the progress of the build-up, the fact having been actually provided with a continuous water supply type damping arrangement using alcohol. When the water supply device is replaced by a brush roller type one, damping water not containing any alcohol can be used.
|
