Multi-resolution roofshooter printheads
October 3, 2011. 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 References 3747120 3864696 Method and apparatus for recording with writing fluids and drop projection means therefor Ink jet system printer of the charge amplitude controlling type capable of printing different size characters Method and apparatus for simultaneously outputting a graphic signal and an alphanumeric signal by using an image reproducing system Elongated fluid jet printing apparatus Image forming method using image forming elements having different concentrations and pitches Ink jet printer Multitone ink jet printer and method of operation Thermal ink jet printhead fabricating process InventorAssigneeApplicationNo. 770272 filed on 10/03/1991US Classes:347/15, Creating plural tones347/40, Array of ejectors347/56, With thermal force ejection400/82INCLUDING PLURAL, INDEPENDENTLY SUPPORTED KEY-BOARDS, PLATENS, OR TYPE-SET ASSEMBLAGESExaminersPrimary: Hartary, Joseph W.Attorney, Agent or FirmForeign Patent References
International ClassesB41V 002/05B41V 002/205 AbstractA printhead for a thermal ink jet printer, preferably a roofshooter type printer, includes at least two arrays of linear spaced apart nozzles and heating elements, each array having a different resolution to produce printed pages at a draft print using a low resolution array, at a letter quality print using a high resolution array, or a combination of both arrays to provide enhanced grey scale reproduction. The high resolution array allows for accurate reproduction at a reduced throughput while the low resolution array allows for moderate reproduction at a higher throughput. Alternatively, the two arrays could be used simultaneously to provide a fast, broad, coarse stroke and a slower, fine detail stroke. | |
