INK STORAGE TANK, INK JET HEAD CARTRIDGE EQUIPPED WITH THE TANK, AND INK JET RECORDER EQUIPPED WITH THE CARTRIDGE

摘要

PURPOSE:To allow positive ink supply from an ink storage tank to a recording head part, as required. CONSTITUTION:An ink bag 4 for holding ink therein is coupled with a part 5 for feeding ink, as required, from the ink gag 4 to a recording head part 2. The supply part 5 is equipped with a hollow hemispherical slit bladder 7 made of elastic member having a slit 7a which is normally closed but opened upon occurrence of predetermined pressure difference between the ink bag 4 and the recording head part 2, and a fixing base 6 to be fit with the peripheral part of the slit bladder 7. Inner peripheral length at the peripheral part of the slit bladder 7 is set shorter than the outer peripheral length at the fitting part of the fixing base 6.