Patent ID: 7891790

Claim:
A disposable ink cartridge for being installed in an existing all-in-one printhead-ink cartridge, the all-in-one printhead-ink cartridge having a printhead and a non-removable ink cartridge, the non-removable ink cartridge being unremovably connected to and within the printhead so as to be installed or removed together with the printhead, wherein from a printhead chamber formed inside the printhead of the all-in-one printhead-ink cartridge, any cover and ink-absorbent materials have been removed, the disposable ink cartridge comprising: an assembly-securement member; an ink cartridge body, the ink cartridge body comprising a cartridge housing, a cartridge cover, at least one air vent cover, at least one ink-storing foam, at least one ink-filtering foam, and at least one sealing member, which are integrated into one indivisible entity, the ink cartridge body being adapted to be installed in the printhead chamber of the printhead to transform the all-in-one printhead-ink cartridge into an assembled segregated printhead-ink cartridge for use in a printer, the installed ink cartridge body being secured by the assembly-securement member and reciprocatingly moving along with the printhead, the at least one sealing member being fixed on a side of the ink cartridge body, being used to seal around an ink outlet of the ink cartridge body and having an elastic sleeve structure with stepped apertures, with an upper sleeve wall tightly pressed into a groove surrounding the ink outlet of the ink cartridge body by means of interference fit between an upper end face of the sealing member and the ink cartridge body to maintain a continuous sealing condition between the sealing member, the ink cartridge body and a lower end face of the sealing member, the lower end face having a flat surface structure adapted to provide a reliable seal when tightly contacting the printhead, so that the ink outlet of the ink cartridge body is directly connected to the printhead; and a cartridge seal holder used to seal the ink outlet of the ink cartridge body before the ink cartridge body is installed in the printhead chamber of the printhead, so that the at least one sealing member seals an end surface of the ink outlet both before and after the ink cartridge body is installed in the printhead chamber of the printhead.