| 摘要 |
PROBLEM TO BE SOLVED: To provide an ink circulation type inkjet printer which prevents ink mixed with air from being supplied to an inkjet head, even if the ink is at a low temperature and has a high viscosity.SOLUTION: When the viscosity of ink returned by a circulation pump 11 to an upper tank 3 from a lower tank 7 through flow paths 131 to 137 in an upstream side flow path block 130, is higher than that of ink supplied to an inkjet head 5 from the upper tank 3 through flow paths 91 to 97 in a downstream side flow path block 90, an ink flow rate difference occurring between the flow paths 131 to 137 in the upstream side flow path block 130 and the flow paths 91 to 97 in the downstream side flow path block 90, caused by the viscosity difference, is reduced by a difference between a heating efficiency of the flow paths 131 to 137 by an temperature adjuster 25 and a heating efficiency of the flow paths 91 to 97 by a temperature adjuster 17. |
