Patent ID: 7556362
Filing Date: 2009-07-07
Classification: B41J,G05D

Abstract:
1. A pressure control valve unit comprising, a unit substrate, a first valve chamber provided at a first side of the unit substrate, forming a part of a first liquid flow-path, a second valve chamber provided at a second side of the unit substrate opposing the first side, forming a part of a second liquid flow-path, a first opening-closing valve provided in the first valve chamber, and a second opening-closing valve provided in the second valve chamber, wherein the first valve chamber and the second valve chamber are arranged in a positional relationship wherein they are not in axial alignment as seen in a thickness direction from the first side to the second side of the unit substrate, the first liquid flow-path and the second liquid flow-path are formed independently of each other, a liquid flow through the first valve chamber and a liquid flow through the second valve chamber are independent from each other, and a pressure of a liquid flowing in the first liquid flow-path and a pressure of a liquid flowing in the second liquid flow-path can be controlled at respective predetermined pressures independently of each other.