Patent ID: 7513253

Claim:
A liquid medication cartridge comprising: an accommodating portion for accommodating a liquid medication; a liquid discharge portion having a discharge port for discharging the liquid medication by using an ink jet technique; and a communicating means for establishing communication between the accommodating portion and the liquid discharge portion, wherein said accommodating portion has a region which is cut off from the atmosphere by a first film and a second film, said region accommodating the liquid medication, wherein said communication means contains a liquid path for conducting the liquid medication from said accommodating portion to said liquid discharging portion and is formed as a unit with said liquid discharging portion, and wherein the cartridge is constructed to operate such that the communication between the liquid discharging portion and the accommodating portion is established when said communication means pierces said first film, then the liquid medication is filled in the liquid discharging portion when said communicating means further penetrates into said accommodating portion, then the region is communicated with the atmosphere when said communicating means pierces said second film.