Patent ID: 6213597
Filing Date: 2001-04-10
Classification: B41J

Abstract:
An ink-replenishing apparatus for an ink cartridge of a jet printer comprising:an ink-injection cylinder having an inner cylinder, a first end of said inner cylinder having an opening with lugs on said ink-injection cylinder on opposite sides of said inner cylinder, while a second end of said inner cylinder has a sealed surface, in a center of which is located an ink straw, a center of said ink straw having a through hole;an ink-storage container including:a bottle body including a cylindrical body portion and an outer body portion with a diameter larger than a diameter of the cylindrical body portion, said cylindrical body portion having a diameter less than a diameter of said inner cylinder and being mounted in said inner cylinder, the diameter of said outer body portion being approximately equal to a maximum dimension of said lugs of said ink-injection cylinder; a shoulder portion located between said cylindrical body portion and said outer body portion; a bottle mouth of said cylindrical body portion having a retaining ring with screw threads; a piston ring having a retaining groove mounted together with said retaining ring, upper and lower edges of said piston ring having ring-shaped surfaces respectively such that, after said ink-storage container and said ink-injection cylinder are assembled together, said ring shaped surfaces of said piston ring closely contact said inner cylinder; and,a threaded cap removably mounted on said screw threads of said bottle mouth so as to hold ink in said ink-storage container when not assembled with said ink-injection cylinder.