LIQUID FILLING METHOD OF LIQUID CONTAINER

摘要

There is provided a method of filling a liquid container with liquid such that an amount of remaining air is suppressed to be as small as possible. For this purpose, while performing, on a liquid containing chamber, a primary pressure reduction, a primary injection, a secondary pressure reduction, and a secondary injection in turn, degrees of the primary pressure reduction and secondary pressure reduction are each appropriately adjusted to fill the liquid with a target amount of air remaining.

主权项

1. A liquid filling method of a liquid container that is equipped with: a case member having a supply port for leading out liquid; a flexible sheet which is adhesively fixed to the case member to form, together with the case member, a liquid containing chamber capable of containing the liquid; and a spring member which biases, via a plate member, the flexible sheet in a direction in which a capacity of the liquid containing chamber is enlarged, the liquid filling method comprising:
a primarily pressure reducing step of reducing pressure inside the liquid containing chamber to make the capacity of the liquid containing chamber to be a minimum capacity; a primarily injecting step of injecting the liquid in an amount smaller than the minimum capacity into the liquid containing chamber with the pressure reduced in the primarily pressure reducing step; a secondarily pressure reducing step of reducing the pressure inside the liquid containing chamber with the liquid injected in the primarily injecting step to make the capacity of the liquid containing chamber to be the minimum capacity, followed by sucking air in the liquid containing chamber with a predetermined amount of air remaining; and a secondarily injecting step of injecting the liquid into the liquid containing chamber after the secondarily pressure reducing step.