Patent ID: 6390613
Filing Date: 2002-05-21
Classification: B41J

Abstract:
An ink-refilling unit for an ink cartridge of a jet printer comprising:an elongate ink cylinder having a hollow inner space for storing ink, a first end of said ink cylinder having a retaining ring adapted to be connected with a leak-proof ring, and a second end thereof having a finger-press plate and a filling nozzle; a leak-proof ring connected with said retaining ring of said ink cylinder, a center of the leak-proof ring having a through hole; an elongate vacuum cylinder, a first end thereof being open to accommodate said ink cylinder therein whereby said vacuum cylinder is in close contact with said leak-proof ring of said ink cylinder, a center of a second, closed end of said vacuum cylinder having a post hole; a hole plug removably mounted in the post hole in said vacuum cylinder; and, an end plug removably mounted on the filling nozzle of said ink cylinder.