Patent ID: 7467842
Filing Date: 2008-12-23
Classification: B41J,Y10T

Abstract:
1. An ink jet nozzle assembly for an inkjet printer, the ink jet nozzle assembly comprising: a substrate defining an ink supply channel, and forming part of a support structure; an integrated circuitry layer positioned on the substrate and incorporating a microprocessor and a first electrical contact connected to the microprocessor; a nozzle chamber structure positioned on the substrate and defining a nozzle chamber in fluid communication with the ink supply channel and an ink ejection port from which ink can be ejected; and an actuator fast at one end with respect to the support structure and terminating freely at another, the actuator being electrically connected to the integrated circuitry layer and having a second actuator connected to the microprocessor via the actuator, the microprocessor being configured to detect the rate of movement of the actuator to a predetermined position beyond an operating position of the actuator arm and to determine whether the detected rate is greater than a normal rate for desired actuation of the actuator arm so as to detect an over-actuation condition.