Patent ID: 7273267
Filing Date: 2007-09-25
Classification: B41J

Abstract:
1. A droplet discharging apparatus, comprising: a nozzle which discharges a droplet of a liquid; a pressure chamber which is in communication with the nozzle and is fillable with the liquid to be discharged as the droplet through the nozzle; a pressure generation device which generates pressure variation in the liquid inside the pressure chamber to cause the droplet to be discharged through the nozzle, wherein a contact angle of the liquid on an inner surface of the pressure chamber is not more than an angle formed inside the pressure chamber by two mutually adjacent surfaces constituting the inner surface, wherein the inner surface includes a bottom surface in which a flow port is formed in communication with the nozzle, a top surface which faces the bottom surface, and a side surface which connects the bottom surface and the top surface; and the contact angle of the liquid on the side surface is not more than the angle formed inside the pressure chamber by two mutually adjacent surfaces constituting the inner surface, further comprising a heating device which heats the liquid when the liquid is filled into the pressure chamber so as to adjust the contact angle of the liquid.