Canon Finetech Inc.

Yoshihito Fukuda

Kayo Mukai

Hideyuki Ito

Kenro Yamaguchi

Takashi Sugai

Noritaka Ota

Masato Kawakami

Masayoshi Yazaki

Marie Ogata

A liquid supply apparatus includes a supply passage for supplying a liquid stored in a liquid storage section to a liquid ejection head. The liquid supply apparatus further includes: a region set within a range including an inside of the liquid storage section and an inside of the supply passage, pressure applied to the liquid in the region varying according to an amount of the liquid remaining in the liquid storage section or in the supply passage; a gas chamber communicating with the region in such a manner that a pressure of gas in the gas chamber varies according to the pressure applied to the liquid in the region; and a pressure sensor detecting pressure in the gas chamber.

Liquid supply apparatus and liquid ejection apparatus with contactless detection of liquid remaining amount

A liquid ejection head is capable of ejecting a liquid through an ejection port, the liquid being supplied from a liquid container with a negative pressure generating section. The liquid ejection head comprises a liquid chamber configured to contain the liquid, a liquid supply section configured to allow the liquid to be supplied from the liquid container to the liquid chamber, and an opening configured to communicate with the liquid chamber and to enable the liquid and/or a gas to flow into the liquid chamber through the opening.

Liquid ejection head and liquid ejection apparatus

Growing community of inventors

Misato, Japan

Yoshihito Fukuda