Ink tank cap and valve linkage

A method, comprising:

• sealing an ink tank with a cap assembly rotatably attached to the ink tank, the cap assembly comprising a housing, a bung retained within the housing, and a spring disposed between the housing and the bung to bias the bung to form a seal with the ink tank during a partial rotation of the cap assembly when the cap assembly is unlatched;
• partially rotating the cap assembly from a closed position to a first position with a preloaded hinge, wherein the bung maintains the seal with the ink tank until a valve in the ink tank is closed;
• and
• further rotating the cap assembly to a second position with the preloaded hinge, wherein the ink tank is unsealed and the valve in the ink tank remains closed.

A system, comprising:

• an ink tank bay;
• at least one ink tank installed in the ink tank bay, each ink tank comprising:
• an ink tank body;
• a cap assembly rotatably attached to the ink tank body with a preloaded hinge, the preloaded hinge to rotate the cap assembly from a closed position to an open position when the cap assembly is unlatched, the cap assembly comprising a housing, a bung retained within the housing, and a spring disposed between the housing and the bung to bias the bung to form a seal with the ink tank during a partial rotation of the cap assembly when the cap assembly is unlatched;
• a spring-loaded linkage connected to a valve in the ink tank;
• an effector extending from the cap assembly to engage and actuate the spring-loaded linkage when the cap assembly is latched and to disengage from the spring-loaded linkage after the cap assembly is unlatched,
• wherein the spring-loaded linkage opens the valve when engaged with the effector, and closes the valve when disengaged from the effector, and
• wherein the bung maintains the seal with the ink tank until the valve is closed by the spring-loaded linkage.