Patent ID: 8727494
Filing Date: 2014-05-20
Classification: B41J

Abstract:
1. A droplet ejection device comprising a droplet ejection head, the droplet ejection head comprising a plurality of droplet ejection nozzles arranged side by side in a vertical direction, each of the plurality of droplet ejection nozzles having a first channel to eject droplets of liquid to a target, a common liquid chamber communicated with the first channel of the each of the plurality of droplet ejection nozzles to supply the liquid to the first channel of the each of the plurality of droplet ejection nozzles, an air vent nozzle having a second channel to vent air from the common liquid chamber, and a nozzle face including the plurality of droplet ejection nozzles and the air vent nozzle, the nozzle face disposed in the vertical direction or a direction tilted downward relative to the vertical direction so that droplets of the liquid are ejected from the plurality of droplet ejection nozzles in a horizontal direction or in a direction tilted relative to the horizontal direction, wherein the first channel is tilted downward so that a side of the each of the plurality of droplet ejection nozzles proximal to the nozzle face is lower than another side of the each of the plurality of droplet ejection nozzles proximal to the common liquid chamber, the air vent nozzle is disposed above a topmost one of the plurality of droplet ejection nozzles, and the second channel is tilted upward so that a side of the air vent nozzle proximal to the nozzle face is higher than another side of the air vent nozzle proximal to the common liquid chamber, and wherein the air vent nozzle has a lower flow resistance to flow of the liquid than the each of the plurality of droplet ejection nozzles.