Patent ID: 7195347

Claim:
An ink cartridge, comprising: a cartridge body, partitioned into foam chambers and ink chambers, and having a first welding part and a second welding part; a lid having a third welding part, engageable and weldable with the first welding part of the cartridge body, and a fourth welding part on the bottom thereof in which the second welding part is insertable; at least one ink head provided on the bottom of the cartridge body to eject ink; and at least one ink filter provided on an upper side of each ink head to prevent foreign materials or bubbles from flowing in, wherein the second welding part has a thickness less than a width of each of the grooves in the fourth welding part, so that a predetermined space occurs on both sides of each second welding part when the second welding part is inserted in the fourth welding parts, to define a first area, and a second area where the second welding part has continuous contact with the fourth welding part, and the first welding part has a first section horizontally protruded in cross-section and a second section vertically protruded to the first section, and the third welding part has a third section vertically protruded, a fourth section horizontally protruded, and a fifth section in a diagonal cross-sectional shape connecting the third section and the fourth section.