Low voltage transformer coupled ink jet driver
Patent 4560998 Issued on December 24, 1985. Estimated Expiration Date: 
July 18, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 18, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesCircuit arrangement for driving piezoelectric ink jet printers Circuit arrangement for the operation of recording nozzles in ink mosaic recording devices Patent #: 4282535 InventorAssigneeApplicationNo. 06/631969 filed on 07/18/1984US Classes:347/9, Of ejector310/317, Input circuit for mechanical output from piezoelectric element347/68With piezoelectric force ejectionExaminersPrimary: Goldberg, E. A.Assistant: Reinhart, Mark J. Attorney, Agent or FirmInternational ClassesB41J 2/015 (20060101)B41J 2/045 (20060101) AbstractThe invention consists of a transformer coupled low voltage power amplifiers which provides the moderate voltage (200-500 Vp-p) excitation potentials required by PZT ink jet or similar device elements. Transformer coupling is viable in that ink jet drive requirements are "return to zero" (no net DC component). Product safety aspects are enhanced since high voltage power supplies are not required, furthermore significant reductions in cost of implementation are realized due to the absence of high voltage power supplies and by allowing the use of monolithic power amplifiers. Savings in power may also be realized by matching the transformer to the ink jet PZT element as components of a resonant network. | |
