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US 8,464,623 B2Granted
Method and arrangement for controlling the temperature of two cylinders
AssigneeTetra Laval Holdings & Finance S.A.
InventorHossain Peshkar
Life of this patent
Estimating the term…
Abstract
Method and arrangement for controlling the temperature of two cylinders forming a nip. The temperature of at least one point on each cylinder is sensed by sensors, forming a point of measuring, wherein the highest sensed temperature is used as set point and wherein the cylinders are heated in areas where the sensed temperature is below the set point.
Claims11
An arrangement configured to score a web of paper or laminated material comprising:
- two cylinders positioned relative to one another to form a nip between the two cylinders to receive the web of paper or laminated material;
- a plurality of sensors positioned adjacent one of the cylinders to measure the temperature at specific points of measuring on the one cylinder or parts associated with the one cylinder and provide output indicating the temperature at the specific points of measuring on the one cylinder;
- a plurality of heaters, each heater being associated with a different one of the points of measuring to apply heat to an area around the point of measuring of the cylinder based on the output from the sensors;
- one of the cylinders including at least one projection positioned in a groove formed in an outer surface of the other cylinder to score the web of paper or laminated material in the nip;
- and
- a controller configured to control operation of the plurality of heaters, based on the output from the plurality of sensors indicating the temperature at the specific points, so that the temperature at each of the specific points of the cylinder is the same to avoid uneven heating of the one cylinder and allow the web of paper or laminated material to be scored by cooperation of the projection and the groove without cutting the web of paper or laminated material.
3 more elements
An arrangement configured to score a web of paper or laminated material comprising:
- two cylinders positioned relative to one another to form a nip between the two cylinders to receive the web of paper or laminated material;
- a plurality of sensors positioned adjacent one of the cylinders to measure the temperature at specific points of measuring on the one cylinder or parts associated with the one cylinder and provide output indicating the temperature at the specific points of measuring on the one cylinder;
- a plurality of heaters longitudinally spaced apart along the one cylinder, each heater being associated with a different one of the points of measuring to apply heat to an area around the point of measuring of the one cylinder based on the output from the sensors;
- one of the cylinders including at least one projection positioned in a groove formed in an outer surface of the other cylinder to score the web of paper or laminated material in the nip;
- and
- a controller configured to control operation of the plurality of heaters, based on the output from the plurality of sensors indicating the temperature at the specific points, so that the temperature at each of the specific points on the one cylinder is the same to avoid uneven heating of the one cylinder and allow the web of paper or laminated material to be scored by cooperation of the projection and the groove without cutting the web of paper or laminated material.
3 more elements
An arrangement configured to score a web of paper or laminated material comprising:
- two cylinders positioned relative to one another to form a nip between the two cylinders to receive the web of paper or laminated material;
- a plurality of sensors positioned adjacent one of the cylinders to measure the temperature at specific points of measuring on the one cylinder or parts associated with the one cylinder and provide output indicating the temperature at the specific points of measuring on the one cylinder;
- a plurality of heaters, each heater being associated with a different one of the points of measuring to apply heat to an area around the point of measuring of the cylinder based on the output from the sensors;
- one of the cylinders including at least one projection and an outer surface of the other cylinder including a groove, the at least one projection being positionable in the groove in the outer surface of the other cylinder to score the web of paper or laminated material in the nip;
- and
- a controller configured to control operation of the plurality of heaters, based on the output from the plurality of sensors indicating the temperature at the specific points, so that the temperature at each of the specific points of the cylinder is the same to avoid uneven heating of the one cylinder and allow the web of paper or laminated material to be scored by cooperation of the projection and the groove without cutting the web of paper or laminated material.
3 more elements
Dependencies are inferred from the claim text.