Method of manufacturing a liquid vessel

1. A method of manufacturing a liquid vessel including a liquid containing body storing liquid therein, and a liquid residual amount detection device for detecting a residual amount of liquid in the liquid containing body, the liquid residual amount detection device comprises a liquid inflow port adapted to be connected to a discharge port of the liquid containing body, a liquid lead-out portion configured to supply the liquid and a vibration detection portion configured to apply vibration to a flow path between the liquid inflow port and the liquid lead-out portion the method comprising:

connecting the liquid inflow port of the liquid residual amount detection device to the discharge port of the liquid containing body in which the liquid has been stored in advance; and

injecting the liquid in the liquid containing body into the liquid residual amount detection device to obtain a state in which the flow path is charged with the liquid, thereby extruding gas remaining in the flow path through the liquid lead-out portion.

2. The method according to claim 1 , wherein the liquid containing body is pressurized by a pressurizing device such that the liquid in the liquid containing body is injected into the liquid residual amount detection device.

3. The method according to claim 1 , wherein the liquid in the liquid containing body is injected into the liquid residual amount detection device by suction of a suction device connected to the liquid lead-out portion.

4. The method according to claim 1 , further comprising decompressing the flow path of the liquid residual amount detection device in advance before the liquid in the liquid containing body is injected into the liquid residual amount detection device.

5. The method according to claim 1 , further comprising:

injecting the liquid in the liquid containing body into the liquid residual amount detection device;

decompressing the liquid residual amount detection device into which the liquid is injected; and

injecting the liquid in the liquid containing body into the decompressed liquid residual amount detection device again.

6. The method according to claim 5 , wherein the decompressing of the liquid residual amount detection device is performed by applying a negative pressure from the liquid lead-out portion to the liquid residual amount detection device when a flow path opening/closing device provided in the vicinity of the liquid inflow port of the liquid residual amount detection device is closed.

7. The method according to claim 5 , wherein the injecting of the liquid in the liquid containing body into the decompressed liquid residual amount detection device again is performed by applying a negative pressure from the liquid lead-out portion to the liquid residual amount detection device when a flow path opening/closing device provided in the vicinity of the liquid inflow port of the liquid residual amount detection device is opened.

8. The method according to claim 1 , wherein the liquid in the liquid containing body is charged into the liquid residual amount detection device and the liquid is then discharged from the liquid lead-out portion until the amount of liquid stored in the liquid containing body becomes a predetermined amount.

9. The method according to claim 1 , wherein the liquid is ink supplied to an inkjet recording apparatus, and the ink in the liquid containing body is injected into the liquid residual amount detection device in a state in which a temperature of the ink in the liquid containing body is increased to a predetermined temperature.

10. The method according to claim 1 , wherein the liquid vessel is an ink cartridge configured to be detachably mounted into a cartridge mounting portion of an ink jet recording apparatus after the liquid vessel is manufactured.

11. The method according to claim 1 , wherein the liquid residual amount detecting device is connected to a detection device holding chamber of the liquid vessel.