RADIATION DEVICE FOR TREATING A FIBER WEB AND/OR ELIMINATING BUBBLES OF A COATING OF A FIBER WEB AND METHOD OF TREATING A FIBER WEB AND/OR ELIMINATING BUBBLES OF A COATING OF A FIBER WEB BY RADIATION

摘要

The invention relates to a radiation device (12) for treating a fiber web (11) and/or eliminating bubbles of a coating of a fiber web (11), which radiation device (12) comprises an electric power source (14) and a radiation unit (13) having more than one radiation resistor (15) connected to the power source (14), which radiation unit (13) is arranged in a lattice form comprising at least two parallel lattice elements (16) to provide a radiation surface, which is directed towards the fiber web (11), which is treated by thermal radiation radiating from the radiation resistors (15). The radiation resistors (15) are made of graphite and that coverage relation of the radiation surface area and the fiber web surface area effected by the radiation is 70 - 120 % provided by the graphite radiation resistors (15). The invention relates also to a method of treating a fiber web and/or eliminating bubbles of a coating of a fiber web by radiation device to be carried out by the radiation device.