Patent ID: 7992981
Filing Date: 2011-08-09
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 pump that pumps a part of the liquid supply channel as a pump chamber; a first one-way valve that is provided in the liquid supply channel on an upstream side from the pump chamber to permit the liquid to flow only in a direction from the upstream side to the downstream side; a second one-way valve that is provided in the liquid supply channel on a downstream side from the pump chamber to permit the liquid to flow only in a direction from the upstream side to the downstream side; and a liquid pressure accumulation unit that is provided in the liquid supply channel on a downstream side from the second one-way valve and stores the liquid in a pressure-accumulated state, wherein the liquid pressure accumulation unit includes an urging unit that applies a predetermined urging force in a direction to decrease the volume of the pressure accumulation chamber.