| 摘要 |
PURPOSE:To provide the titled controller capable of controlling the viscosity of an ink through a simple construction without need for solenoid valves or the like, wherein a float capable of moving upward and downward in accordance with the difference between the specific gravity thereof and that of an ink to open and close a valve provided at a bottom part of a solvent tank is provided in a mixing tank. CONSTITUTION:A float 13 is provided in a mixing tank 1 for mixing fresh ink, solvent and recovered ink which are supplied respectively from a fresh-ink tank 2, a solvent tank 3 and a gutter 4. The float 13 is moved upward and downward along a float guide 14, and has a specific gravity of slightly higher than that of the fresh ink. A push rod 15 is additionally provided at an upper part of the float 13, and when a push pin 17 connected to a valve body 16 provided at a bottom part of the tank 3 is lifted up by the buoyancy of the float 13, the solvent liquid is supplied into the mixing tank 1. |
