US 11,745,513 B2
Liquid supplying device having tank and cartridge attachable thereto
Masahiro Hayashi, Nagoya (JP); Yoshinori Osakabe, Seto (JP); Akinari Ishibe, Okazaki (JP); and Hiroaki Takahashi, Nagoya (JP)
Assigned to BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed by BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed on Aug. 2, 2021, as Appl. No. 17/391,402.
Application 17/391,402 is a continuation of application No. 15/902,755, filed on Feb. 22, 2018, granted, now 11,077,668.
Claims priority of application No. 2017-037642 (JP), filed on Feb. 28, 2017.
Prior Publication US 2021/0354471 A1, Nov. 18, 2021
Int. Cl. B41J 2/175 (2006.01)
CPC B41J 2/17513 (2013.01) [B41J 2/1752 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A liquid supplying device comprising:
a tank;
a liquid container configured to be attached to the tank, the liquid container comprising a first storage chamber configured to store liquid, the tank comprising a second storage chamber configured to store the liquid; and
a liquid passage and a gas passage, through which the first storage chamber is in fluid communication with the second storage chamber in an attachment state where the liquid container is attached to the tank, liquid flowing from the first storage chamber to the second storage chamber in the attachment state, gas flowing from the second storage chamber to the first storage chamber in the attachment state,
the liquid passage having:
a first end configured to be connected to the second storage chamber in the attachment state and formed with a first opening; and
a second end opposite to the first end, the second end being configured to be connected to the first storage chamber in the attachment state and being formed with a second opening, the first opening and the second opening being apart from each other in a horizontal direction when viewed in a vertical direction,
the gas passage having:
a third end configured to be connected to the second storage chamber in the attachment state and formed with a third opening; and
a fourth end opposite to the third end, the fourth end being configured to be connected to the first storage chamber in the attachment state and being formed with a fourth opening, the third opening and the fourth opening being apart from each other in the horizontal direction when viewed in the vertical direction,
the tank further comprising an air communication portion having an air communication opening allowing the second storage chamber to communicate with an atmosphere,
wherein, in the attachment state, the first storage chamber is in communication with both the second opening and the fourth opening, the second storage chamber is in communication with both the first opening and the third opening, the first storage chamber has a portion positioned above both of the entire liquid passage and the entire gas passage, and the second storage chamber is positioned below the second opening of the liquid passage and the fourth opening of the gas passage such that the liquid level of the second storage chamber is kept below the second opening of the liquid passage even when the liquid level of the first storage chamber is above the second opening of the liquid passage.