Ink jet printing head
Patent 4528575 Issued on July 9, 1985. Estimated Expiration Date: 
August 27, 2002. 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.
August 27, 2002. 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 ReferencesPrinting ink supply device for ink jet printer Method and apparatus for recording with writing fluids and drop projection means therefor Ink jet head Multi-layer ink jet apparatus Patent #: 4392145 InventorsApplicationNo. 06/414363 filed on 08/27/1982US Classes:347/71, Layers, plates347/40, Array of ejectors347/47, Nozzles347/85Fluid supply systemExaminersPrimary: Goldberg, E. A.Assistant: Reinhart, M. Attorney, Agent or FirmInternational ClassesB41J 2/14 (20060101)B41J 2/145 (20060101) B41J 2/15 (20060101) Foreign Application Priority Data1980-12-30 JPAbstractAn ink jet printing head which includes a head body provided with an ink filling port (18), a plurality of rows of nozzles (32A1 through 32A5, 40B1 through 40B5) arrayed in a staggered formation, pressure chambers (21A1, 21A2, . . . , 21B1, 21B2, . . . ), one for each of the nozzles, and ink passages (28A1, . . . , 33A1, . . . , 38B1, . . . , 41B1, . . . ) connecting the ink filling port with the nozzles via corresponding pressure chambers. (19A1 through 19A5, 19B1 though 19B5). The pressure chambers are formed inside the head body and adjacent to the surface of at least one side of the head body. Piezoelectric elements are mounted on the outside of the head body at positions corresponding to the pressure chambers.Other References
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