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Ink cartridge and vacuum-packaging product containing the same

  • US 20040074804A1
  • Filed: 07/08/2003
  • Published: 04/22/2004
  • Est. Priority Date: 07/09/2002
  • Status: Active Grant
First Claim
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1. An ink cartridge comprising:

  • an ink accommodating portion operable to hold ink;

    an air passage operable to make said ink accommodating portion communicate with atmosphere; and

    a valve mechanism, provided in said air passage, including an air-releasing valve member operable to seal a communication hole provided in a partition wall that separates an ink-accommodating-portion side, that is a side close to said ink accommodating portion, from an atmosphere side, that is a side close to said atmosphere, in a direction from said ink-accommodating-portion side to said atmosphere side, wherein said air-releasing valve member has a contact portion operable to open said air passage by receiving an external force from said atmosphere side to said ink-accommodating-portion side.

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