Patent ID: 8270449
Filing Date: 2012-09-18
Classification: B41J

Abstract:
1. A liquid supply device comprising: a liquid cartridge comprising a liquid chamber configured to store liquid, the liquid chamber comprising a first portion, a second portion, and a third portion; a cartridge mounting portion, wherein the liquid cartridge is configured to removably attach to the cartridge mounting portion; and a surface detector configured to detect whether a surface of the liquid stored in the liquid chamber is positioned below a reference position when the liquid cartridge is attached to the cartridge mounting portion, wherein a horizontal cross-sectional area of the first portion of the liquid chamber is less than each of a horizontal cross-sectional area of the second portion of the liquid chamber and a horizontal cross-sectional area of the third portion of the liquid chamber, and wherein the reference position is positioned in the first portion of the liquid chamber, and the first portion of the liquid chamber is positioned between the second portion and the third portion of the liquid chamber in a particular direction orthogonal to the horizontal cross-sectional area of the first portion of the liquid chamber.