Manufacture of an non-laminated paper web having regions of increased thickness
Patent 4239591 Issued on December 16, 1980. Estimated Expiration Date: 
October 19, 1998. 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.
October 19, 1998. 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 670847 762914 1605491 3119730 Method of making wet-pressed fiberboard of high resistance to bending Patent #: 4032394 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 webExaminersPrimary: Chin, PeterAttorney, Agent or FirmInternational ClassD21F 11/00 (20060101)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.Field of SearchNon-uniform, irregular or configured web or sheetMulti-layer waterlaid webs or sheets With measuring, inspecting and/or testing Treatment of slurry on mold surface Directing slurry into association with mold Projecting or slinging stock Of stock feed to forming device Means flinging or projecting stock against mold Plural separate streams of stock applied to mold Longitudinally spaced points of application Plural molds or plural spaced areas of application on a single mold Means treating stock on molding surface Slice Flow box, slice, and/or approach flow By fluid pressure Pressure member Solid means acting on formed web | |
