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Apparatus for ink cartridge of a jet printer

  • US 6,213,597 B1
  • Filed: 02/29/2000
  • Issued: 04/10/2001
  • Est. Priority Date: 02/29/2000
  • Status: Expired due to Fees
First Claim
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1. 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.

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