Ink-jet head cartridge with bubble chamber

A head cartridge comprising:

• three ink reservoirs for storing ink, each of the link reservoirs having a bottom end, and each ink reservoir being used for storing ink of a different color;
• three ink channels, one ink channel corresponding to each ink reservoir;
• at least two protruded edges disposed in the bottom end of the ink reservoirs for separating a bubble chamber from each of the three ink channels;
• a base plate having at least one joint portion to join with each of the ink reservoirs, the base plate further comprising two separating walls connecting with the bottom ends of the three ink reservoirs to form the three ink channels;
• a print head disposed in the base plate, the print head capable of heating ink so as to generate bubbles, the bubbles causing ink to eject from the print head;
• and
• three outlets, one outlet formed on the bottom end of each ink reservoir,
• wherein the bass plate, the bottom end of the ink reservoirs, and the protruded edges form the three ink channels and the three corresponding bubble chambers, the ink channels are connected with the corresponding ink reservoirs and the corresponding outlets for transmitting ink from the connected ink reservoirs to the connected outlets, so that the outlets are capable of exporting ink to the print head for transmitting ink from the ink reservoirs to the print head, and the bubbles generated by the print head will float upwards so that the bubbles will be stored in the bubble chambers.