Patent ID: 7997719
Filing Date: 2011-08-16
Classification: B41J

Abstract:
1. A liquid droplet ejecting head designed to be mounted in a liquid ejecting instrument, comprising a plurality of ejection nozzles through which droplets are to be ejected from the head, and a plurality of actuating chambers, each actuating chamber having at least one inlet to be in fluidic connection with a liquid reservoir for providing liquid to the actuating chamber, at least one actuating means suitable for creating a pulse wave in the liquid contained therein when activated by energy received from a control device, and at least one outlet portion in fluidic connection with at least one ejection nozzle of the plurality of ejection nozzles, wherein each ejection nozzle has an ejection axis, wherein the plurality of ejection nozzles are oriented such that the ejection axis of each nozzle intersects with one another at a predetermined point situated on a central axis of the head at a certain distance away from the head so as each ejection axis forms an angle with the central axis, the ejected droplets combine at the predetermined point, and wherein the control device is configured to actuate the actuating chambers at a fixed frequency between 500-800 Hz, the plurality of actuating chambers being arranged to pulse a total combined drop volume of approximately 150-200 pL.