Patent ID: 8147044
Filing Date: 2012-04-03
Classification: B41J

Abstract:
1. A liquid supply device comprising: a liquid supply channel that supplies a liquid from an upstream side as a liquid supply source side to a downstream side, on which the liquid is consumed; a first valve that is provided in the liquid supply channel to open and close the liquid supply channel; a second valve that is provided on a downstream side from the first valve in the liquid supply channel to open and close the liquid supply channel, wherein the first valve is closed when the second valve is open, and a pump that pumps a pump chamber provided in the liquid supply channel between the first valve and the second valve, wherein, when the pump performs a suction action to increase the volume of the pump chamber and suck the liquid into the pump chamber, the first valve is opened and the second valve is closed, and when the pump decreases the volume of the pump chamber to eject the liquid from the pump chamber, the first valve is closed and the second valve is opened.