Abstract: A process is disclosed for controlling the shape of a metal strip being rolled between two rolls. The process includes measuring the shape of the strip, spraying cooling fluid on the rolls, and controlling the spraying of cooling fluid according to a duty cycle.

Abstract: An improved color sensor is provided having two sources of illumination, one source being modulated on and off while the other source remains on. Data taken while the modulated source is on is compared with data taken while the modulated source is off to compute the effective fluorescence of the sample. A corrected color spectrum can then be determined for a defined source.

Abstract: A system and method are disclosed for standardization a basis weight gauge for measuring the weight per unit area of sheet material. The method includes the calibration steps of obtaining two calibration curves, one of which is displaced from the other by a dirt simulation technique.The displacement between the two curves is expressed as a third curve. A standard sample of a pre-determined basis weight is inserted in the radiation path to provide a standard shft in conjunction with the dirt simulation to provide a reference value for the displacement function curve. During operation of the basis weight gauge, standardization is provided by relating a current standard shift to the initial standard shift to correct the displacement function curve, based upon the value of the third curve at a point corresponding to a measured transmission ratio.

Abstract: A system is provided for measuring the velocity of vibrations in a moving web, such as a sheet of paper. The system includes a transmitter coupled to the paper to transmit waves and a receiver to receive the waves. A signal processing system is used to determine the velocity.

Abstract: A device for controlling the diameter of cylindrical sections of a rotating calender roll. The device comprises at least one nozzle which directs a jet of air against the calender roll. The flow of air from each nozzle remains approximately constant. Only the temperature of the jets change as heating elements associated with each nozzle are energized or deenergized. Thermal expansion or contraction, resulting from localized heating or cooling by the air jets, corrects local non-uniformities in the calender roll diameter.

Abstract: A process is provided for controlling a thickness regulating member such as a slice lip coupled to slice rods. The process includes determining the desired configuration of the slice lip and determing the required slice rod movements based upon physical characteristics of the slice lip and the slice rods.

Abstract: A system for measuring the values of a parameter of a sheet of material is provided. The system includes a head system with sensors mounted therein and a distance correction system to correct the measured parameter for variations in the distance between parts of the head system.

Abstract: A system is provided to receive and process information including a processor, an operator station and an interconnect processor. The interconnect processor is coupled to the processor by a first bus, and the interconnect processor is coupled to the operator station by a second bus.

Abstract: A device for selectively controlling the diameter of sections of a calender roll. The device comprises a plurality of nozzles which direct jets of superheated steam against sections of the calender roll. Thermal expansion, resulting from localized heating by the steam jets, corrects local non-uniformities in the gap between adjacent cooperating calender rolls. Moisture which condenses from the steam onto the calender roll surface is removed by a flow of air past the roll surface.

Abstract: The present invention is directed toward a controller for controlling the local diameters of a temperature sensitive calender roll by selectively heating sections of a sheet of calenderable material with infrared lamps while the sheet is in contact with the calender roll or before the sheet contacts the roll. The calender roll is made of a material having at least one dimension which responds to changes in temperature. Therefore, thermal expansion of the roll, resulting from contact of the heated sheet with the roll surface, corrects local non-uniformities in the calender roll diameters. If the calender rolls unexpectedly stop or slow down so that the sheet of calenderable material becomes overexposed to infrared radiation, a fire detecting device detects and extinguishes the fire by turning off the infrared heating lamps and flooding the area around the lamps with a fire-extinguishing fluid.

Abstract: The present invention is directed toward a controller for controlling local calender roll diameters by directing temperature controlled fluid against selected slices of a rotating calender roll. The calender roll has a diameter which responds to changes in temperature. Therefore, thermal expansion or contraction, resulting from localized heating or cooling of the calender roll by the temperature controlled fluid, corrects local non-uniformities in the spacing between cooperating calender rolls. The invention conserves energy by recirculating the temperature controlled air.

Abstract: A process is disclosed for determining tuning constants of a process control loop, the loop including a process control module, an actuator and a controlled process. The disclosed process includes making a series of changes to the target value of the actuator while measuring corresponding changes in the output of the controlled process. Certain calculations are applied to the information to determine the tuning constants, and the constants are applied to the control module.

Abstract: A real-time distributed data-base system that stores in the local memory of each processor copies of only those variables necessary for execution of the programs in that processor. Performance is enhanced by using the absolute address of variables in each program reference, with automatic updating of all program references when the location of variables are changed. Flexibility in user application programming is enhanced by permitting combination and conditional updates of variables through the interaction of multiple processors.

Abstract: A system and process for controlling a boiler is disclosed. The system includes a television camera mounted above the reciprocable grate of the boiler to locate craters in solid fuel on the grate and an actuator to vary an operating parameter of the furnace according to the location of the craters.

Abstract: A gas measuring device has a source capable of emitting a beam of radiation aligned to impinge a detector. A housing means encloses the beam. The housing means has a plurality of apertures permitting the gas to enter the housing means, to intercept the beam, and to exit from the housing means. The device further comprises means to control the amount of thermal radiation reaching the detector.

Abstract: The specification discloses a steam distributor having a chamber to contain steam on one side of a paper web and a vacuum box on the opposite side of the paper web. The distributor has a feeding system for controlling the rate at which hot gas is applied to the paper.

Abstract: The specification discloses a steam distributor having a chamber to contain steam on one side of a paper web and a vacuum box on the opposite side of the paper web. The chamber has a vacuum release means to prevent the chamber from being pulled onto the paper web if vacuum is applied when steam is not applied.

Abstract: A process for modifying a paper machine headbox manually-adjustable slice rod assembly. The slice rod assembly is cut and a fluid actuator is inserted to permit the assembly to be operated by the fluid actuator in combination with a screw jack.

Abstract: A process for controlling a calciner system is disclosed wherein the temperatures of the calcined product and the flue gas, and the rate of fuel flow to the burner are measured. A fuel flow set point is determined from the product and flue gas temperatures and the rate of fuel flow to the burner is controlled to the set point.

Abstract: A system and process for calibrating a computer-based combustion gas analyzer is disclosed. The process includes introducing a series of gas samples into the analyzer, each sample containing a known concentration of a particular gas. The output of the analyzer is recorded and compared with the known gas concentrations to compute calibration coefficients which are used to calibrate the analyzer.