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An ink liquid supply system for an ink jet system printer includes an ink intake needle formed in a body of the ink liquid supply system, and an ink cartridge removably mounted on the body of the ink liquid supply system. The ink cartridge includes an opening covered by a rubber seal through which t

An ink liquid supply system for an ink jet system printer includes an ink intake needle formed in a body of the ink liquid supply system, and an ink cartridge removably mounted on the body of the ink liquid supply system. The ink cartridge includes an opening covered by a rubber seal through which the ink intake needle is inserted when the ink cartridge is mounted on the body of the ink liquid supply system. An ink liquid absorbing pad is attached to the rubber seal so as to cover the seal rubber. The ink liquid absorbing pad functions to prevent the ink liquid from dripping onto the body of the ink liquid supply system when the ink cartridge containing ink is denounted from the body of the ink liquid supply system.

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An ink cartridge for an ink liquid supply system which includes an ink intake needle for introducing ink from said cartridge into said supply system and an ink discharge needle for returning ink liquid to said ink cartridge, said ink cartridge comprising a bottom surface provided with two cylinder s

An ink cartridge for an ink liquid supply system which includes an ink intake needle for introducing ink from said cartridge into said supply system and an ink discharge needle for returning ink liquid to said ink cartridge, said ink cartridge comprising a bottom surface provided with two cylinder shaped projections each having an ink liquid passage formed therein through each center of said respective cylinder shaped projection for accommodating said respective intake and discharge needles and communicating with ink liquid disposed in said ink cartridge, means for sealing each of said ink liquid passages and means for absorbing ink, disposed repsectively in the prescribed order, on said projections and cap means for capping each of said cylinder shaped projections, said sealing means and ink absorbing means being disposed between said cylinder shaped projections and said cap means, each of said cap means being provided with an opening corresponding with said ink liquid passages of said cylinder shaped projections for introduction of said intake and discharge needles accordingly.