Process for controlling properties of travelling sheets with sca

Details Process for controlling properties of travelling sheets with sca Process for controlling properties of travelling sheets with sca

1989-01-27

1990-05-01

Hastings, Karen M.

Paper making and fiber liberation

Processes and products

With measuring, inspecting and/or testing

162252, 162263, D21F 106, D21F 706

Patent

active

049215744

ABSTRACT:
A 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.

REFERENCES:
patent: 3678594 (1972-07-01), Goerz, Jr. et al.
patent: 3936665 (1976-02-01), Donoghue

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