Patent ID: 8262205
Filing Date: 2012-09-11
Classification: B41J

Abstract:
1. A liquid discharge device, comprising: a discharge head comprising a nozzle for discharging liquid; a sub tank capable of storing liquid to be supplied to the discharge head; and a liquid replenishment device comprising: wherein the joint member is capable of being connected to and disconnected from the sub tank, and the liquid within the main tank is supplied to the sub rank when the joint member is in a connected state with the sub tank; wherein the joint member comprises a liquid path that opens upward, a valve, and a spring that biases the valve in a direction where the liquid path is closed; wherein the valve is configured to receive a force from the sub tank and open the liquid path against the biasing force of the spring in a case where the joint member is to be connected to the sub tank; and wherein the valve is configured to further open the liquid path against the biasing force of the spring, due to an inner space of the main tank having a negative pressure greater than a first value, in order to function as a negative pressure controlling valve for the main tank while the joint member is in a disconnected state with the sub tank; and wherein the main tank is not provided with a negative pressure controlling valve.