Method and apparatus for leveling the cross-direction profile of stock slurry on a papermachine
Patent 3989085 Issued on November 2, 1976. Estimated Expiration Date: 
November 2, 1993. 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 2, 1993. 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 3407114 3547775 3859163 InventorAssigneeApplicationNo. 582863 filed on 06/02/1975US Classes:162/198, With measuring, inspecting and/or testing162/208, Treatment of slurry on mold surface162/252, Automatic control162/258, Of stock consistency162/263, Measuring, testing, inspecting, indicating or illuminating162/297, Pneumatic pressure or vacuum means acting directly on stock on mold surface162/310Fluid jet or suction means (e.g., shower deckle)ExaminersPrimary: Bashore, S. LeonAssistant: Fisher, Richard V. Attorney, Agent or FirmAbstractUndesirable high concentrations of fiber and moisture in the cross-direction profile of a paper stock slurry laid upon a papermachine fourdrinier screen may be selectively dispersed to level the cross-direction profile by impacting the screen carried pond of slurry at 1.5 to 4 feet down from the headbox slice opening with a fluid spray issued under a pressure drive of from 20 to 100 psi. If a cross-direction high concentration of fiber is to be corrected, the appropriate spray fluid to be used is water. If a cross-direction high concentration of water unaccompanied by a cross-directionally aligned high concentration of fiber is to be corrected, the appropriate spray fluid to be used is air.Field of SearchWith measuring, inspecting and/or testingTreatment of slurry on mold surface Directing slurry into association with mold 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) Slurry supply conditioning or condition maintaining | |
