Browse Prior Art Database

Monolithic Actuator for a Matrix Printer

IP.com Disclosure Number: IPCOM000042648D
Original Publication Date: 1984-Jun-01
Included in the Prior Art Database: 2005-Feb-04
Document File: 2 page(s) / 102K

Publishing Venue

IBM

Related People

Wilson, JT: AUTHOR

Abstract

A monolithic print wire actuator contains both laminated piezoelectric or ferro-electric beams and the electronic modules required to switch the operating voltages which cause the beams to deflect. Monolithic wire actuator 10 comprises eight flexure beams 11 formed from a common 4-layer lamination. The lamination is formed from plural piezoelectric or ferro-electric layers 12 separated by conductive layers 13. Plated conductive paths 14 are formed on the outer surfaces of the lamination 10 and any other conductive layers 13, as desired. The beams 11 are formed by cutting, etching, or casting slots 15 into the lamination 10. A print wire 16 is attached to each beam 11 near its tip. The plated conductive outer paths 14 and the inner conductive layers 13 conduct power to the electronic circuit modules 17.

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Monolithic Actuator for a Matrix Printer

A monolithic print wire actuator contains both laminated piezoelectric or ferro- electric beams and the electronic modules required to switch the operating voltages which cause the beams to deflect. Monolithic wire actuator 10 comprises eight flexure beams 11 formed from a common 4-layer lamination. The lamination is formed from plural piezoelectric or ferro-electric layers 12 separated by conductive layers 13. Plated conductive paths 14 are formed on the outer surfaces of the lamination 10 and any other conductive layers 13, as desired. The beams 11 are formed by cutting, etching, or casting slots 15 into the lamination 10. A print wire 16 is attached to each beam 11 near its tip. The plated conductive outer paths 14 and the inner conductive layers 13 conduct power to the electronic circuit modules 17. Plated through holes and plated edges can be used to transfer signals and current between different levels of the lamination 10. Because of the low currents required to drive the beams 11, many driver circuits can be integrated into a single module 17. The circuitry of the modules 17 determine the magnitude, polarity and duration of the driving voltages. The electric charges flow from the electronic modules 17 along the conductive paths in conductive layers 13 and 14 of beams 11, causing them to flex. Each beam 11 is independently flexed. If the piezoelectric layers 12 are poled with a positive voltage, and the potentials +, -, and ground applied as shown, the beams 11 will flex to the position shown in the broken lines in the right figure. The pr...