Patent ID: 6916089
Filing Date: 2005-07-12
Classification: B41J,F16K,G05D

Abstract:
1. An ink cartridge for detachable mounting to an ink jet recording apparatus, comprising: a container for supplying ink to the ink jet recording apparatus, the container having a plurality of outer walls, a valve assembly wall, an ink chamber and an ink supply chamber, the ink chamber being located upstream of the ink supply chamber relative to a direction of ink flow, the valve assembly wall being located between the ink chamber and the ink supply chamber, relative to the direction of ink flow, the valve assembly wall having (i) a first side, (ii) a second side opposite from the first side and facing toward the ink supply chamber, and (iii) a contact portion, and an ink supply port downstream of the ink supply chamber through which ink flows to the ink jet recording apparatus; an elastically deformable valve seat having therein a through hole having a perimeter, the valve seat being mounted relative to the contact portion of the valve assembly wall; and a biasing member for applying a predetermined force to the valve seat so that the perimeter of the through hole is urged against and is obstructed by the contact portion of the valve assembly wall.