US Patent 7121654 Liquid ejection apparatus

A liquid ejection apparatus including a liquid supply unit having a supply unit case for accommodating a liquid charging portion, and a main body having a supply unit arranging part for arranging the liquid supply unit and a carriage part for moving along the vicinity of the supply unit arranging part, wherein the carriage side of the liquid supply unit arranged in the supply unit arranging part is provided with an information storing unit mounting portion formed to be protruded toward the carriage side, the supply unit arranging part is provided with a through window portion for causing the information storing unit mounting portion to penetrate therethrough, and carriage side information storing unit is formed in a portion corresponding to the through window portion in the carriage part for moving in the vicinity of the through window portion.