Process for controlling properties of travelling sheets with scan widths less than the sheet width
Patent 4921574 Issued on May 1, 1990. Estimated Expiration Date: 
January 27, 2009. 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.
January 27, 2009. 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 3678594 Sheet material characteristic measuring, monitoring and controlling method and apparatus using data profile generated and evaluated by computer means Patent #: 3936665 InventorAssigneeApplicationNo. 303478 filed on 01/27/1989US Classes:162/198, With measuring, inspecting and/or testing162/252, Automatic control162/263Measuring, testing, inspecting, indicating or illuminatingExaminersPrimary: Hastings, Karen M.Attorney, Agent or FirmForeign Patent References
International ClassesD21F 001/06D21F 007/06 AbstractA method for controlling high-speed sheetmaking machine after abrupt process changes and during start-up periods, includes operating a scanning sensor to periodically traverse back and forth across a sheet in the cross direction to detect values of selected sheet property along each scan while the cross-directional width of each scan is controlled to be substantially less than the width of the sheet being scanned, the progressively increasing the width of the scan until each scan encompasses the full width of the moving sheet. | |
