Valve device, ink cartridge comprising the valve device and method of supplying ink

An ink box, comprising a ink chamber; A connecting chamber, which can with a feed cabin connected; A valve, a movable; A bracket, comprising located at the connecting chamber; the bracket comprises a valve seat and an opening; an insulating a bottom of the similar centre section, a valve seat the opening of each valve; Bulldozes device with a, which is stretched out from the valve seat, bulldozes device in contact with the valve directly, and bulldozes the valve to the valve seat, while a predetermined power exerts on the valve, the valve and a valve seat, a supporting and bulldozes device to form is an integral.