Pressure control device for a processing machine with rolls
Patent 4154160 Issued on May 15, 1979. Estimated Expiration Date: 
May 25, 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.
May 25, 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 2908964 3023695 3119324 3885465 Apparatus for controlling a deflection compensating press roll of a rolling mill Patent #: 4023480 InventorAssigneeApplicationNo. 05/800395 filed on 05/25/1977US Classes:100/47, Of roll separation or speed100/162B, Roll crown control100/170, Fluid pressure137/85, With counter-balancing pressure feedback to the modulating device425/149, Molding pressure control means responsive to pressure at shaping area (e.g., injection or press mold, etc.)492/5Antideflection meansExaminersPrimary: Feldman, PeterAttorney, Agent or FirmInternational ClassesD21G 1/00 (20060101)F16C 13/00 (20060101) Foreign Application Priority Data1976-05-26 DEAbstractA pressure control device for processing machines having at least one roll which has a stationary core around which a hollow roll which forms the roll proper revolves with radial spacing from the core, the hollow roll supported at its ends on the core and supported on the core in between in the radial direction by a fluid pressure medium disposed in a chamber formed at the core, the fluid pressure medium generating a force acting on the inside of the hollow roll to provide the operating pressure of the roll, with a loading device operated by a fluid pressure medium also applied either to the roll or a counter-roll, either the loading device or roll forming a controlling element, with a control pressure which is derived from the pressure prevailing therein used to adjust a pressure in the other controlled element which has a definite predetermined pressure ratio to the pressure in the controlling element, which pressure control device includes a pressure ratio monitoring device having as inputs the control pressure and the actual pressure in the controlled element and compares the inputs and, if the pressure in the controlling element becomes to high relative to a predetermined pressure ratio, reduces the pressure to the controlled element in order to reestablish the desired predetermined pressure ratio. | |
