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Ink container

  • US 6,742,881 B2
  • Filed: 07/26/2002
  • Issued: 06/01/2004
  • Est. Priority Date: 07/27/2001
  • Status: Expired due to Fees
First Claim
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1. An ink container comprising:

  • a negative pressure generating member accommodating portion for accommodating a negative pressure generating member for retaining therein pigment ink to be supplied to an ink jet head;

    an ink supply port for supplying the ink to said ink jet head;

    an air vent for fluid communication between said negative pressure generating member accommodating portion and an ambient air; and

    an ink non-transmitting portion for partly blocking flow of the ink in the negative pressure generating member toward said ink supply port, wherein fluid communication is enabled except for the non-transmitting portion, and a sectional area, across a general direction of the flow of the ink toward said ink supply port in said negative pressure generating member accommodating portion, of non-communicating portion is not less than 50%. wherein there are provided a plurality of such non-transmitting portions; and

    wherein said non-transmitting portions are off-set such that communicating portions are not aligned in a line along the direction.

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