BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to a liquid storage pack.

Description of the Related Art

There are liquid ejection apparatuses such as inkjet recording apparatuses that include a liquid storage pack storing a liquid such as an ink in a flat bag member having flexibility. Such a liquid storage pack is required to stably supply the liquid to the liquid ejection apparatus even after the flexible bag member shrinks with consumption of the liquid. Japanese Patent Application Laid-Open No. 2018-65373 discloses a liquid storage pack that prevents closure of a flow path inside its bag member by providing a spacer member inside the bag member.

However, with the liquid storage pack disclosed in Japanese Patent Application Laid-Open No. 2018-65373, there is a possibility that unintended bends may be formed on the bag member, in particular at a portion under the spacer member and end portions as the shrinkage of the bag member progresses. As a consequence, a high-concentration liquid containing a large amount of a settling component may remain unused at the bent portions of the bag member, thus making the concentration of the liquid to be supplied to the liquid ejection apparatus not uniform.

It is therefore an object of the present invention to provide a liquid storage pack capable of stably suppling a liquid at a uniform concentration regardless of the remaining amount of the liquid.

SUMMARY OF THE INVENTION

In order to achieve the above object, a liquid storage pack of the present invention includes: a flat flexible bag member storing a liquid to be supplied to a liquid ejection apparatus; and a spacer member provided inside the bag member. The spacer member has an outer shape that is symmetrical with respect to a predetermined reference plane, and is disposed such that, in a state where the bag member is fully filled with the liquid, the reference plane is offset from a center plane of the bag member in a thickness direction of the bag member, the center plane passing a center of the bag member in the thickness direction and being perpendicular to the thickness direction.

Further features of the present invention will become apparent from the following description of exemplary embodiments with reference to the attached drawings.

