Method and apparatus for leveling the cross-direction profile of stock slurry on a paper machine
Patent 4152202 Issued on May 1, 1979. Estimated Expiration Date: 
November 30, 1997. 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.
November 30, 1997. 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 1989435 2951007 3072146 3407114 3437098 3587969 Method and apparatus for leveling the cross-direction profile of stock slurry on a papermachine Patent #: 3989085 InventorAssigneeApplicationNo. 05/855997 filed on 11/30/1977US Classes:162/198, With measuring, inspecting and/or testing162/208, Treatment of slurry on mold surface162/252, Automatic control162/253, Of plural operations162/258, Of stock consistency162/263, Measuring, testing, inspecting, indicating or illuminating162/310, Fluid jet or suction means (e.g., shower deckle)239/543, ONE FLUID STREAM IMPINGES UPON ANOTHER (I.E., CONVERGING)239/551And flow control for each nozzleExaminersPrimary: Bashore, S. LeonAssistant: Alvo, Steve Attorney, Agent or FirmInternational ClassesD21G 9/00 (20060101)D21F 7/00 (20060101) AbstractThe characteristic profile of a paper web is adjusted on the fourdrinier by means of a number of fluid spray stations positioned across the papermachine. Each spray station is provided with two or more fan spray nozzles of different flow capacity oriented to impact the pond with fluid along a common line. Flow to each nozzle is binary controlled with respective binary command, full flow valves. By discrete manipulation of valve selection, total flow rate to the web may be adjusted without flow throttling and consequent impact velocity variations.Other References
Field of SearchWith measuring, inspecting and/or testingTreatment of slurry on mold surface Automatic control Of stock consistency Measuring, testing, inspecting, indicating or illuminating Pneumatic pressure or vacuum means acting directly on stock on mold surface Fluid jet or suction means (e.g., shower deckle) | |
