Method of removing a blockage in a micro electronmechanical...

Details Method of removing a blockage in a micro electronmechanical... Method of removing a blockage in a micro electronmechanical...

2006-04-04

2006-04-04

Gordon, Raquel Yvette (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

Reexamination Certificate

active

07021747

ABSTRACT:
A method of detecting a blockage within a micro electro-mechanical device in the form of an ink ejection nozzle having an actuating arm that moves an ink displacing paddle when heat inducing electric current is passed through the actuating arm and having a movement sensor associated with the actuating arm. The method comprises the steps of passing at least one current pulse having a predetermined duration through the actuating arm and detecting for a predetermined level of movement of the actuating arm. A fault is detected to exist if the detected movement of the arm is less than the desired movement for an unblocked condition. Where a blockage is detected, at least one further current pulse having an energy level greater than the blockage detecting pulse may be passed through the actuating arm in an attempt to clear the blockage.

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Design, Fabrication, and Teting of a C-Shape Actuator; G Lin, CJ Kim, S Konishi, H Fujita; IfM, Louisiana Tech Univ., PO Box 10348, Rustom, LA 71272, USA; Mane Dept, UCLA, Los Angeles, CA 90095, USA; IIS, Univ of Tokyo, Roppongi, Minato-ku, Tokyo 106 Japan.

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