LIQUID DISCHARGE HEAD AND LIQUID DISCHARGE APPARATUS

Abstract: a liquid discharge head or apparatus includes a discharge unit configured to discharge liquid inside a pressure chamber; a supply flow path through which liquid to be supplied to the pressure chamber flows; a collection flow path that is connected to the supply flow path through the pressure chamber and through which liquid collected from the pressure chamber flows; a circulating pump capable of supplying liquid to the pressure chamber through the supply flow path, collecting liquid from the pressure chamber through the collection flow path, and recirculating collected liquid to the supply flow path; and a pump drive circuit configured to generate the pump drive signal by stepping up and converting to alternating current a direct-current reference voltage signal having voltage lower than the peak-to-peak voltage of the pump drive signal.

Inventor(s): YUJI TAMARU, SHINICHIRO MATSUMOTO, TAKUHIRO OGUSHI, HISAO OKITA, TOMOO IIZUMI, KIMIYUKI HAYASAKI, KENJIRO WATANABE, CHIAKI MURAOKA, YOSUKE TAKAGI, SHIMPEI YOSHIKAWA

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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