Ink cartridge for printer

An inkjet type recording apparatus for outputting ink onto a recording medium, comprising:

• a recording head for ejecting ink;
• and
• an ink cartridge coupled to said recording head for supplying ink to a recording head, including:
• an ink cartridge main body having a plurality of walls, an interior and an exterior;
• an ink supply port disposed in a first of said plurality of walls of said ink cartridge main body and communicating from the interior to the exterior of said ink cartridge main body for the flow of ink therethrough;
• and
• a cover having an interior surface adapted to seal said ink cartridge main body, an ambient air vent formed in said cover in fluid communication with ambient air, an air communication passage formed at least in part in said internal surface of said cover and said air communication passage having a first end and a second end and being in fluid communication at said first end of said air communication passage with said ambient air vent, and a further air vent formed in said cover and in fluid communication with said air communication passage al the second end of said air communication passage and with the interior of said ink cartridge main body, the interior of said ink cartridge main body being placed in fluid communication with ambient air through said air communication passage and said further air vent and said ambient air vent.

An ink supply system for supplying ink to a recording head of an ink-jet type recording apparatus, comprising:

• an ink cartridge for supplying ink to the recording head, including:
• an ink cartridge main body having a plurality of walls, an interior and an exterior;
• an ink supply port disposed in a wall of said ink cartridge main body and communicating from the interior to the exterior of said ink cartridge for the flow of ink therethrough;
• and
• a cover having an internal surface adapted to seal said ink cartridge main body, an ambient air vent formed in said cover in fluid communication with ambient air, an air communication passage formed at least in part in said internal surface of said cover in fluid communication at one end of said passage with said ambient air vent, and a further air vent formed in said cover and in fluid communication with said air communication passage at the other end of said passage and with the interior of said ink cartridge main body, the interior of said ink cartridge main body being placed in fluid communication with ambient air through said air communication passage and air vents.