DIFFERENTIAL PRESSURE REGULATING VALVE AND INK CARTRIDGE HAVING THE DIFFERENTIAL PRESSURE REGULATING VALVE

摘要

PROBLEM TO BE SOLVED: To provide a differential pressure regulating valve in which a reaction force generated by deformation is reduced, and to provide an ink cartridge having the differential pressure regulating valve.;SOLUTION: The differential pressure regulating valve 1 has a peripheral part 4 and a thin film 5 in the peripheral part 4 which has a thickness thinner than that of the peripheral part 4, and is composed of an elastic material. The thickness of the thin film 5 is uneven. The ink cartridge 3 has the differential pressure regulating valve 1.;COPYRIGHT: (C)2010,JPO&INPIT