Patent ID: 6868623

Claim:
Process for controlling the temperature of a product in the form of a web ( 12 ) that is influenced by an IR ramp ( 9 ) for surface treatment of the web ( 12 ) comprising: with the help of a number of temperature sensors ( 26 ), which are situated on a common IR-ramp ( 9 ) at a mutual distance (B) from one another laterally ( 27 ) across the web ( 12 ) within evenly distributed zones (I, II, III . . . ), the temperature is measured continuously on the web ( 12 ) across ( 27 ) and along its direction of movement ( 28 ), in that the measurement result from the respective zone (I, II, III . . . ) of the web ( 12 ) is transmitted to respective drier modules ( 2 ) for subjecting the respective associated aforementioned zones (I, II, III . . . ) of the web ( 12 ) to heat, in that the aforementioned drier modules ( 2 ) are supported by an aforementioned common IR ramp ( 9 ), closely packed together sideways across the direction of movement ( 28 ) of the aforementioned web and extending along the direction of movement ( 28 ) of the aforementioned web and that the temperature is measured downstream of the ramp ( 9 ) and the lamps ( 3 ) viewed in the direction of movement ( 28 ) of the web ( 12 ); the temperature sensors ( 26 ), disposed laterally across the common IR-ramp ( 9 ), continuously measuring the temperature of the web across the web in each respective zone; connecting every temperature measuring point to a control device; a computer calculating what variation in power is being required, based on temperature information continuously measured by each temperature sensor, to adjust the measured temperature to the temperature reference value in each respective zone; and varying a power sent to each respective zone to heat and adjust the measured temperature in each respective zone to a temperature reference value.