Patent ID: 9694585
Date: 2017-07-04
CPC Classifications: B41J

Claim:
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 primary 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 primary 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 primary pressure reducing step; a secondary pressure reducing step of reducing the pressure inside the liquid containing chamber with the liquid injected in the primary 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 secondary injecting step of injecting the liquid into the liquid containing chamber after the secondary pressure reducing step.