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US Patent 4239591 - Manufacture of an non-laminated paper web having regions of increased thickness
US Patent Issued on December 16, 1980
Estimated Patent Expiration Date:
October 19, 1998Estimated 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.
Estimated Patent Expiration Date:
October 19, 1998Estimated 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.AbstractA non-laminated paper sheet product characterized by regions or islands of increased thickness, usually located in the center of the sheet for more economical use of the paper product and for conservation of wood pulp. The regions of increased thickness are formed by depositing or laying additional pulp stock onto a generally uniform thickness paper web in the web-forming area of a paper machine in either wet or dry methods of paper production. Continuous regions of increased thickness in the web can be formed by corresponding variations in the width of the web or by spraying the additional pulp onto the forming web. Islands of increased web thickness can be formed by periodically interrupting pulp stock depositing sprayheads disposed at spaced locations across the width of the forming web, with timing devices or web thickness sensors controlling the sprayheads. | InventorApplicationNo. 05/952624 filed on 10/19/1978US Classes:162/109, Non-uniform, irregular or configured web or sheet162/123, Multi-layer waterlaid webs or sheets162/198, With measuring, inspecting and/or testing162/208, Treatment of slurry on mold surface162/213, Projecting or slinging stock162/259, Of stock feed to forming device162/292, Means flinging or projecting stock against mold162/299, Longitudinally spaced points of application162/300, Plural molds or plural spaced areas of application on a single mold162/361Solid means acting on formed webField of Search162/109, Non-uniform, irregular or configured web or sheet162/123, Multi-layer waterlaid webs or sheets162/198, With measuring, inspecting and/or testing162/208, Treatment of slurry on mold surface162/212, Directing slurry into association with mold162/213, Projecting or slinging stock162/259, Of stock feed to forming device162/292, Means flinging or projecting stock against mold162/298, Plural separate streams of stock applied to mold162/299, Longitudinally spaced points of application162/300, Plural molds or plural spaced areas of application on a single mold162/308, Means treating stock on molding surface162/344, Slice162/336, Flow box, slice, and/or approach flow162/115, By fluid pressure162/210, Pressure member162/361Solid means acting on formed webExaminersPrimary: Chin, PeterAttorney, Agent or FirmUS Patent References670847, 762914, 1605491, 3119730, 4032394Method of making wet-pressed fiberboard of high resistance to bendingIssued on: 06/28/1977 Inventor: Back International ClassD21F 11/00 (20060101) |
