Piezo-electric actuating element for a recording head

Details Piezo-electric actuating element for a recording head Piezo-electric actuating element for a recording head

H - Electricity

04

R

349/65, 101/96.0

H04R 17/00 (2006.01) B41J 2/025 (2006.01) B41J 2/16 (2006.01) H01L 41/08 (2006.01)

Patent

CA 1071749

ABSTRACT C A N A D A A piezo-electric actuating element for a recording head, preferably for a mosaic recording apparatus, comprises a tube of piezo- electric material having dimensions such that the quotient of the wall thickness and the arithmetic mean of the internal and external diameters of the tube is equal to the Poisson's ratio of the piezo-electric material. This prevents any alteration in the external diameter when a pulsed electric field is applied to eject ink from the interior of the cylinder, and hence avoids loosening of the tube in its holder.

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