Abstract: An inkjet printing system includes an inkjet printhead including a nozzle array and an ink inlet fluidically connected to the nozzle array; a pressure regulated ink supply including: an unvented regulator chamber including: a capillary medium; and an ink outlet connected to the ink inlet of the printhead; a free ink reservoir including an ink inlet connector; and a dividing wall disposed between the regulator chamber and the free ink reservoir, the dividing wall including an ink passageway permitting ink to pass from the free ink reservoir into the regulator chamber; a carriage configured to move the printhead and the pressure regulated ink supply back and forth across a print region; a stationarily mounted main ink supply; and a flexible ink supply line connecting the main ink supply to the ink inlet connector of the free ink reservoir.

Abstract: A seal for an ink-discharge port on a printer ink cartridge, according to various embodiments of the present invention, is disclosed. The seal has a surface containing channels that oppose a direction in which the port is configured to discharge ink from the ink cartridge. Such channels facilitate the retention of ink by the seal during removal of the seal, thereby reducing the likelihood of ink spillage during such removal.

Abstract: A seal for an ink-discharge port on a printer ink cartridge, according to various embodiments of the present invention, is disclosed. The seal has a surface containing channels that oppose a direction in which the port is configured to discharge ink from the ink cartridge. Such channels facilitate the retention of ink by the seal during removal of the seal, thereby reducing the likelihood of ink spillage during such removal.