Patent ID: 6276785
Filing Date: 2001-08-21
Classification: B41J

Abstract:
An ink tank cartridge for an ink-jet type recording apparatus, comprising:a first chamber;a second chamber adjacent to and formed integral with said first chamber;a porous member received in said second chamber;a partition wall separating said first chamber from said second chamber, said partition wall being formed with a communicating hole therethrough, said communicating hole being positioned in the vicinity of the bottom of said partition wall and extending along a portion of the width of said partition wall as viewed in the direction of said bottom of said partition wall, said second chamber communicating with said first chamber through said communicating hole;at least one groove formed in said partition wall above said communicating hole on the side facing said second chamber, said at least one groove being in fluid communication with said communicating hole;an ink supply port extending through a wall of said second chamber, said ink supply port supplying ink to the exterior of said cartridge from said porous member;an air vent port in a wall of said second chamber spaced from said ink supply port and communicating hole to provide ambient air to the interior of said second chamber, said porous member and said first chamber containing ink; andat least one projection formed on the inside of said wall of said second chamber thereby forming an air pocket between said air vent and said porous member.