Patent ID: 8240823

Claim:
A liquid droplet ejecting apparatus, comprising: a plurality of liquid droplet ejecting portions, each including a supply port supplying a liquid from outside and a discharge port discharging the liquid supplied through the supply port, and each ejecting the liquid supplied through the supply port as liquid droplets; supply-side individual flow paths being connected to the respective supply ports of the plurality of liquid droplet ejecting portions and allowing the liquid to flow to the supply ports; discharge-side individual flow paths being connected to the respective discharge ports of the plurality of liquid droplet ejecting portions and allowing the liquid discharged from the discharge ports to flow; a supply-side common flow path connecting with a plurality of the supply-side individual flow paths and allowing the liquid to flow to the plurality of supply-side individual flow paths; a discharge-side common flow path connecting with a plurality of the discharge-side individual flow paths and allowing the liquid from the plurality of discharge-side individual flow paths to flow; first opening/closing mechanisms being disposed in the plurality of supply-side individual flow paths and opening/closing the plurality of supply-side individual flow paths; second opening/closing mechanisms being disposed in the plurality of discharge-side individual flow paths and opening/closing the plurality of discharge-side individual flow paths; a first pressure applying portion being disposed in the supply-side common flow path and applying pressure to the supply-side common flow path; a second pressure applying portion being disposed in the discharge-side common flow path and applying pressure to the discharge-side common flow path; a first circulating path circulating the liquid between the supply-side common flow path and the discharge-side common flow path; a third opening/closing mechanism being disposed in the first circulating path and opening/closing the first circulating path; a second circulating path including an upstream end portion being connected to the supply-side common flow path further downstream than a connecting portion of a supply-side individual flow path connected to the supply-side common flow path at a furthest upstream side in a liquid circulating direction and a downstream end portion being connected to the discharge-side common flow path, and circulating the liquid between the supply-side common flow path and the discharge-side common flow path; and a fourth opening/closing mechanism being disposed in the second circulating path and opening/closing the second circulating path.