Patent ID: 9358801
Filing Date: 2016-06-07
CPC Classification: B41J

Claim Text:
1. A liquid supply device, comprising: a first container in which liquid is stored; a second container to which the liquid is supplied from the first container; a flow path configured to connect the first container by one end of the flow path and to connect the second container by the other end of the flow path; a valve provided on the flow path and configured to switchably operate between an opened state in which the liquid is allowed to flow in the flow path and a closed state in which the liquid is not allowed to flow in the flow path; a pump provided on the flow path and configured to cause the liquid to be transferred from the first container to the second container; and a control unit configured to operate the pump under a state in which the valve is in the opened state so as to cause the liquid in the first container to be transferred to the second container, then switch the valve from the opened state to the closed state and stop the pump, under a pressure decreased state in which the pressure in the first container is decreased by the pump, and then switch the valve from the closed state to the opened state under the pressure decreased state while the pump is stopped so as to cause liquid in the second container to be transferred to the first container.