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 bag 4 to a recording head part 2. The supply part 5 is equipped with a bladder 7 made of elastic member having a flange part 7b and a slit 7a which is normally closed but opened upon occurrence of a 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 bladder 7. The flange part 7b is held between a bladder cover 8 and the fixing base 6 and secured in place. This structure prevent removal of the slit bladder 7 even when the ink pressure increases therein.