Coated paper making apparatus and method

摘要

Apparatus for making coated paper serving as lower ignition propensity paper for cigarettes has a transport path (L) for a web (W), a coating unit (10) arranged on the path (L) to apply a combustion inhibition material to the web (W), a pre-dryer (16) for drying the web (W) with the material applied, a gravure roller (22) arranged downstream of the pre-dryer (16) to apply water to the web (W), a drying roller (34) arranged downstream of the roller (22) to post-dry the web (W), a smoothing roller (32) arranged between the roller (22) and the roller (34) to flatten wrinkles in the web (W) passing around the roller (32), a displacement sensor (42) for measuring wrinkles in the web (W) having passed around the roller (34), and a controller (44) for controlling tension in the web (W) on the basis of measurements received from the sensor (42).

主权项

1. Coated paper making apparatus comprising:
a transport path along which a web to be formed into coated paper is transported; a liquid-form coating material coating unit arranged on said transport path to apply a liquid-form coating material to one side of the web; a pre-dryer arranged downstream of said liquid-form coating material coating unit to dry the web; a water coating unit arranged downstream of said pre-dryer to apply water to the web, all over a surface thereof; a post-dryer arranged downstream of said water coating unit to dry the web; a smoothing roller rotatably arranged between said water coating unit and said post-dryer to flatten wrinkles in the web passing around said smoothing roller; a measurement device for measuring wrinkles possibly remaining in the web having passed through said post-dryer and supplying measurements, the measurement device including:
a displacement sensor arranged at a predetermined distance from the transport path to measure a distance between the sensor and the web moving on the transport path, anda backing roller arranged along the transport path in a position opposite to the displacement sensor, the transport path being between the backing roller and the displacement sensor, the backing roller guiding the web by supporting the web moving beneath the backing roller on a side of the web opposite to a side on which the coating material is applied; wherein the displacement sensor measures distance between the sensor and the web on the backing roller in a direction perpendicular to the surface of the web, to determine a size of the wrinkles in the web; and the apparatus further comprising: a quality controller for managing the measurements received from said measurement device.