Patent ID: 7988266
Filing Date: 2011-08-02
Classification: B41J,F16K

Abstract:
1. A valve core of an ink cartridge with an ink supply port adapted to supply ink to a print head, the valve core comprising an elastic valve sheet and a valve stem, the elastic valve sheet comprising: an inner portion; and an outer portion extending outwards from the inner portion and protruding towards an upstream side of the valve core, wherein the upstream side of the valve core is distal to the ink supply port, the outer portion adapted to sealingly engage and disengage with a valve seat in which the valve core is mounted; and the valve stem disposed at a general central portion of the valve core; wherein the valve stem comprises a longitudinal passageway comprising a first end open to a downstream side of the valve core and a second end open to the upstream side of the valve core, wherein the downstream side of the valve core is proximal to the ink supply port, and the longitudinal passageway allows passage of ink from the downstream side to the upstream side of the valve core.