Patent ID: 8201930
Filing Date: 2012-06-19
Classification: B41J

Abstract:
1. A liquid supply device comprising: a liquid supply passage which supplies a liquid from an upstream side on which the liquid is supplied from a liquid supply source to a downstream side on which the liquid is consumed; a pump which is provided with a pump chamber in the liquid supply passage; a displacement member which forms a part of a wall surface of the pump chamber and is displaceable to increase or decrease the volume of the pump chamber; an urging member which urges the displacement member in a direction decreasing the volume of the pump chamber; and a displacement mechanism which displaces the displacement member in a direction increasing the volume of the pump chamber against an urging force of the urging member upon driving the displacement mechanism, wherein upon stopping the drive of the displacement mechanism, the pump chamber remains in a pressurized state by the urging force of the urging member.