Patent ID: 7600837
Filing Date: 2009-10-13
Classification: B41J

Abstract:
1. A droplet ejection apparatus used for a recording operation in which a droplet of a liquid is ejected on a recording medium, comprising: a recording head including (a) a nozzle from which the droplet of the liquid is ejected, (b) a pressure chamber which is filled with the liquid and whose volume is changeable for ejecting the droplet from the nozzle, and (c) an actuator which changes the volume of the pressure chamber by a drive pulse inputted thereto; a carriage which holds the recording head and which is capable of reciprocating the recording head; and an operating device which outputs the drive pulse to the actuator and which controls the carriage such that the recording head is reciprocated over a recording area where the recording operation is performed and a non-recording area which is outside of the recording area; wherein the operating device is capable of performing a restoring operation for restoring a droplet ejection performance of the recording head, the restoring operation including: wherein the first operation is for outputting a plurality of first pulse groups in each of which a first pulse-train having at least one pulse each as the ejection drive pulse is repeated continuously at a first period, and which are outputted such that a first interval longer than the first period is interposed between any successive two of the plurality of first pulse groups;