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Ink refill unit with incremental millilitre ink ejection for print cartridge

  • US 7,699,446 B2
  • Filed: 07/22/2008
  • Issued: 04/20/2010
  • Est. Priority Date: 01/21/2004
  • Status: Expired due to Fees
First Claim
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1. An ink refill unit for a print cartridge, said unit comprising:

  • a housing defining a fluid path in fluid communication with an outlet and configured to be operatively engaged with the print cartridge;

    a fluid reservoir having an ejection port arranged in fluid communication with the fluid path inside the housing; and

    an ejector assembly configured to incrementally eject fluid from the reservoir when the assembly is actuated by operative engagement of the print cartridge with the housing,wherein the ejector assembly is configured so that the amount of the printing fluid ejected from the reservoir by the ejector assembly is between 6 ml and 50 ml per increment.

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