US Patent 7854499 Liquid housing container

The present invention provides a liquid housing container that enables an increase in the channel cross section of a connection portion of a liquid channel that allows a liquid housing chamber to communicate with an exterior, allowing pressure loss to be minimized. A supply needle 107 is pushed into a liquid housing container to move, to an open position, a valve 102A. With the valve 102A remaining in the open position, the supply needle 107 is pushed back and held separate from the valve 102A. Subsequently, the supply needle 107 is pushed into the liquid container again to move the valve 102A to a closed position. Even when the supply needle 107 is removed from the liquid housing container, the valve 102A is held in the closed position.