To sustain liquid ejection performance of a liquid ejection head by providing a means for coating the nozzle surface with surfactant in a head cap for protecting the nozzle surface of the liquid ejection head.
In a head cartridge 3 comprising a print head 10 having a nozzle member 12 provided with a nozzle 13 for ejecting ink supplied from an ink tank 9 containing each color ink, and a head cap 11 fixed removably to the print head 10 to move relatively and protecting the nozzle surface 12a, a means 14 for coating the nozzle surface 12a with surfactant is provided in the head cap 11. Consequently, a film of surfactant is formed on the nozzle surface 12a while absorbing ink drops adhering thereto, thus sustaining ink ejection performance of the print head 10.
NISHI SHOTA
FUKUDA TOSHIO
NAKAMURA MASATO
TANAKA YASUHIRO
ANDO NAOSHI
HORII SHINICHI
Haruyuki Nishiyama
Next Patent: CLEANER OF LIQUID EJECTION HEAD AND LIQUID EJECTOR