Method of manufacturing a liquid container including a check valve and bypass flowing passage, and liquid container including said check valve and bypass flowing passage

摘要

Since a bypass flowing passage which communicates with the inside of a bag part not through a second valve mechanism is provided for an outlet part, ink can be filled from the outlet part into the bag part in spite of the existence of the second valve mechanism. Further, after an empty ink pack has been housed in an inner case, the ink is filled into the ink pack. Therefore, when a first seal film is welded to the inner case, since the bag part is not bulky, the ends of the bag part are caught in a cartridge case. Therefore, the maximum amount of ink for the inner volume of the cartridge case can be filled. Further, since a bypass flowing passage is blocked after the ink has filled into the ink pack, contamination of air bubbles into the bag part through the bypass flowing passage is prevented.