Patent ID: 7097281

Claim:
An ink supply apparatus for printers adopted for use on a printer which has an ink cartridge housing compartment that includes at least one ink intake aperture and at least one signal receiving section, comprising: at least one liquid storing cartridge located in the ink cartridge housing compartment including an ink channeling chamber and a buffer chamber, the ink channeling chamber having an ink inlet corresponding to the ink intake aperture, the buffer chamber having an ink replenishing opening; at least one ink storing unit containing ink of a selected color; at least one duct having one end communicating with the ink storing unit and other end running through the ink replenishing opening and the buffer chamber to allow the ink held in the ink storing unit to fill the liquid storing cartridge through the duct; a chip dock located in the ink cartridge housing compartment having at least one wedge trough on one side corresponding to the signal receiving section to hold an external control chip; and a bucking member having two ends to press respectively one side of the ink cartridge housing compartment and another side of the chip dock opposite to the wedge trough so that the chip dock is pressed by the bucking member to allow the control chip to form a tight coupling with the signal receiving section.