Heatable roll for use in calenders and the like
Patent 4964202 Issued on October 23, 1990. Estimated Expiration Date: 
April 27, 2009. 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.
April 27, 2009. 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 ReferencesRoll for use in calenders or the like Calender Roll for use in calenders or the like Pressure roll for use in calenders or the like Roll assembly for use in calenders and the like Roll for use in calenders and the like Self-loading controlled deflection roll Patent #: 4821384 InventorsAssigneeApplicationNo. 344261 filed on 04/27/1989US Classes:492/7, Rotatable relative to supporting shaft100/162B, Roll crown control100/329, Means to independently heat or cool different sections of roll100/336, Roll core has a temperature conditioning fluid flow passage492/12, WITH IMPELLOR; E.G., FAN, PUMP492/46WITH HEATING, COOLING, OR HEAT TRANSFER MEANSExaminersPrimary: Gorski, Joseph M.Assistant: Hughes, S. Thomas Attorney, Agent or FirmForeign Patent References
International ClassB21B 013/02Foreign Application Priority Data1988-05-02 DEAbstractA calender roll wherein a cylindrical shell is rotatably mounted on a stationary carrier by way of bearings which are disposed in the end portions of the shell. The median portion of the shell is heated by a first heating device, and the end portions of the shell are heated by a discrete second heating device. The second heating device has channels which are provided in the end portions of the shell and/or indictive heaters which are adjacent to the exterior of the end portions of the shell. Alternatively or in addition to such expedients, the second heating device can include the bearings in the end portions of the shell; each such bearing includes or constitutes an axial or radical hydrostatic bearing which is heated by hydraulic fluid to thereby heat the respective end portion of the shell. The second heating device ensures that the effective length of the shell approximates or even matches the axial length of the shell.Field of SearchRoll crown controlFluid pressure Including fluent-driven tool support WITH LUBRICATING, SEALING, PACKING OR BEARING MEANS HAVING INTERNAL WORKING FLUID CONNECTION (E.G., FLUID OR FLUID BIASED SEAL, ETC.) For shaft sealing, packing, lubricating or bearing means With inlet and outlet connections INCLUDING ADDITIONAL MEANS CAUSING OR CONTROLLING FLUID FLOW FOR HEAT EXCHANGING, LUBRICATING OR SEALING INCLUDING HEAT INSULATION OR EXCHANGE MEANS (E.G., FINS, LAGGING, ETC.) | |
