LIQUID EJECTION HEAD AND LIQUID EJECTION APPARATUS

Abstract: a liquid ejection head includes: an ejection element configured to generate a pressure for ejecting the liquid; a supply channel through which the liquid is supplied to a pressure chamber; a collection channel connected to the supply channel through the pressure chamber and through which the liquid is collected from the pressure chamber; a circulation pump capable of supplying the liquid from the supply channel into the pressure chamber, and collecting the liquid in the pressure chamber through the collection channel and sending the liquid to the supply channel; a first pressure adjustment unit disposed between an outlet channel of the circulation pump and the supply channel and configured to adjust a pressure in the supply channel; and a second pressure adjustment unit disposed between an inlet channel of the circulation pump and the collection channel and configured to adjust a pressure in the collection channel.

Inventor(s): MANABU OHARA, NAOZUMI NABESHIMA, SOJI KONDO, KAZUYA YOSHII

CPC Classification: B41J2/17596 (characterised by ink handling {(cleaning by driving a fluid through the nozzles to the outside thereof ; for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing )})

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