JP2009269336A5 - - Google Patents

Claims (10)

The droplet discharge method for performing a droplet discharge from said nozzle using a head having a Bruno nozzle,
When stopping the liquid droplet ejection, crimp the cap solvent consists solvent resistance of the material to the surface having the nozzle is immersed in said head,
Irradiating the piezoelectric element disposed on the head opposite to the surface having the nozzle with a laser beam, and measuring the displacement of the piezoelectric element by receiving the reflected light from the piezoelectric element;
Comparing the measured displacement with a preset reference displacement to determine whether the cap is in close contact with the head;
A droplet discharge method characterized by the above. ^{2. The} droplet discharge method according to claim 1 , wherein the pressure at the time of pressing the cap against the head is set to 15 to 80 gf / cm < ² > to perform pressure bonding . The droplet discharging method according to claim 1, wherein the cap has a plate shape . Droplet discharge method according to claim 1 or 2, wherein the configured the cap from the tube. Wherein the surface having the nozzle, droplet discharge method according to claim 1-4 set forth in any one, characterized in that water-repellent treatment has been performed in the head. And a head having a nozzle Roh,
A cap made of solvent-resistant material, soaked with solvent,
A pressure contact base that fixes the cap, moves the cap in a direction of the surface having the nozzle in the head, and crimps the cap to the surface having the nozzle;
A piezoelectric element provided on a surface of the head opposite to the surface having the nozzle;
A laser emitting / receiving device disposed opposite to the piezoelectric element;
A displacement measuring device that irradiates the piezoelectric element with laser light emitted from the laser emitting / receiving device, receives reflected light from the piezoelectric element, and measures the displacement of the piezoelectric element;
A droplet discharge apparatus comprising: The liquid droplet ejection apparatus according to claim 6 , wherein a pressure when the cap is pressed against the head is set to 15 to 80 gf / cm ² . 8. The liquid droplet ejection apparatus according to claim 6, wherein the cap has a plate shape . Droplet ejection apparatus according to claim 6 or 7, wherein the configured the cap from the tube. 10. The droplet discharge device according to claim 6, wherein a surface of the head having the nozzle is subjected to a water repellent treatment . 11.