Patent ID: 8220909

Claim:
An ink bag adapter, comprising: an ink bag fixing portion fixed to a predetermined portion of an ink bag that reserves ink supplied to an ink ejection head; an ink bag container fixing portion fixed to a predetermined portion of a tray-shaped ink bag container that houses the ink bag and is mounted on a printing apparatus; a recessed portion or a protruding portion for each ink type of the fixed ink bag and that coincides with a corresponding protruding portion or recessed portion of the printing apparatus at a time when the ink bag container is mounted to the printing apparatus; and a storage medium holding portion that, when fixed to the ink bag container, holds a storage medium that stores information regarding the ink in the fixed ink bag at a predetermined position, wherein the ink bag container fixing portion includes a stopper and a collar member that are fixed together to form a pressing portion that presses a bonded portion of the ink bag that hermetically seals the ink bag, the bonded portion of the ink bag includes a front end portion, a boat-shaped portion, and a boundary portion between the front end portion and the boat-shaped portion, the pressing portion holds the front end portion, the boat-shaped portion and the boundary portion sandwiched between the stopper and the collar member, the storage medium holding portion and the recessed portion or protruding portion of the ink bag adapter are provided on the collar member, and the ink bag container fixing portion is fixed to the ink bag fixing portion.