Ink-jet copier in which an original image is prescanned for optimized printing
August 22, 2017. 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 3428744 3730988 3769631 Facsimile system High speed, high resolution image processing system Edge decomposition for the transmission of high resolution facsimile images Use of a densitometer for adaptive control of printhead-to-media distance in ink jet printers Color sensor array with independently controllable integration times for each color Simplified document handler job recovery system with reduced memory duplicate scanned image detection Color sensor array and system for scanning simple color documents InventorsAssigneeApplicationNo. 916499 filed on 08/22/1997US Classes:358/1.6, Specific to image source358/486Scan rate or document movement variation in accordance with data presenceExaminersPrimary: Au, AmeliaAssistant: Cooperrider, F. E. Attorney, Agent or FirmForeign Patent References
International ClassB41B 015/00AbstractIn a digital copier in which the copies are made with a reciprocating ink-jet printhead, the original image to be copied is pre-scanned at high speed and low resolution, to identify an area in the original image having white space. If the white-space area in the original image is sufficiently large, the action of the printhead can be adapted to skip the corresponding area in the copy sheet in the printing process, thus increasing the overall throughput of the digital copier. An analogous technique can be used to identify non-halftone or non-color portions of an original image, which can be printed with fewer than a maximum number of passes of the printhead over a specific area of the copy sheet. | |
