How to control the hydraulic pressure of the ink pressure adjustment system and ink-jet printing in the head to adjust the ink pressure in the ink-jet print head

摘要

PROBLEM TO BE SOLVED: To adjust an inner pressure of an ink chamber for continuously generating ink drops each having a good shape and preventing reverse flowing after electing. ;SOLUTION: A valve device that is disposed in a print head of an ink jet pen and adjusts a flow and a pressure of an ink in the print head is provided. The device comprises a valve member 110 having deformable elastic flaps disposed in ink channels 128a, 128b which are adjacent to each other in an ejection chamber 132. The flaps are curved so as to adjust the flow and pressure of the ink flowing into or out of the ink ejection chamber 132.;COPYRIGHT: (C)1998,JPO