Patent ID: 7942511
Filing Date: 2011-05-17
Classification: B41J,Y10T

Abstract:
1. A method of manufacturing a liquid container, the liquid container comprising: a liquid containing chamber in which a liquid can be contained, an air communicating passage allowing the liquid containing chamber to communicate with air, a liquid supply port for supplying the liquid contained in the liquid container to an outside of the liquid container, a liquid flow passage allowing the liquid container and the liquid supply port to communicate with each other, a differential pressure valve which is disposed in the liquid flow passage, which is normally urged to a closed state, and which is changed to an opened state when a differential pressure between a side of the liquid supply port and a side of the liquid containing chamber is equal to or more than a predetermined value, the liquid flow passage comprising a supply port side flow passage between the liquid supply port and the differential pressure valve, a partitioning wall partitioning the supply port side flow passage and the liquid containing chamber, a plurality of ribs formed on a top surface of the partitioning wall, a film member covering the ribs, the supply port side flow passage and the liquid containing chamber, and a bypass flow passage defined by a gap between the plurality of ribs, and communicating the supply port side flow passage and the liquid containing chamber so as to bypass the differential pressure valve, the method comprising: