| 摘要 |
<p>PURPOSE:To make the viscosity of ink constant by a method wherein there is provided a float in the ink of the ink supply system of an ink jet printer, the vertical movement of it is detected and the specific weight is compensated. CONSTITUTION:Between a movement 203 for inserting an ink cartridge 202 and an ink jet head 216 is provided a subtank 205, to which is returned the ink also collected from a gutter 214. There is provided a float 207 in this subtank 205. The specific weight of this float 207 is made slightly larger than that of the ink which is not volatilized at all. Accordingly, as the volatility progresses and the coefficient of viscosity increases, the specific weight of the ink becomes larger and the float 207 rises toward the liquid surface 206. There is provided a lead switch in the guide of the float 207 and a circular magnet enclosing the guide is fitted in the float 207. Therefore, when the float 207 rises, the lead switch becomes closed and an electrical signal is given. Thus, the solvent is mixed with the ink to get a desired specific weight.</p> |
