METHOD AND ARRANGEMENT FOR COATING A MOVING WEB

摘要

Method and arrangement for coating a paper or board web, wherein the web (1) to be coated is brought to a film transfer coater and taken to a nip (12) between the film transfer roll (3) of the coater and its backing roll (4), and coating mix is applied onto the surface of the film transfer roll (3). The web (1) is taken through the nip (12) between the rolls (3, 4) and the rolls (3, 4) are turned whereby the coating mix applied onto the applicator roll (3) is at least partly transferred onto the surface of the web (1). According to the invention the web (1) is supported through the nip (12) by means of a belt (2) travelling at the same speed as the web, the belt having been arranged to travel round the backing roll (4). The web (1) is taken onto the surface of the belt (2) prior to the nip (12) and separated from the belt (2) after the nip, and it is pressed against the film transfer roll (3) by means of the belt (2) and the length of the path covered in contact with each other by the web (1) and the film transfer roll (3) is controlled by varying the position of the web (1) and the belt (2).