Patent EP-2157240-A2 (EP)
Inventor: TREFZ MICHAEL DR
IPC: B05C5/00
Filed: 2009-08-18
Abstract: The machine for applying a liquid or pasty coating medium onto a surface of a moving material web (18) such as paper or cardboard by using a curtain-coater (10) and drying the applied coating medium by using a contactless drying device, comprises passing the material web into the machine by deflection arrangements contacting the material web, where the deflection arrangements displace against each other and/or define section of the material web progress in different directions, and delivering the coating medium from a silt nozzle or a glide layer nozzle to the assigned surface of the web. The machine for applying a liquid or pasty coating medium onto a surface of a moving material web (18) such as paper or cardboard by using a curtain-coater (10) and drying the applied coating medium by using a contactless drying device, comprises passing the material web into the machine by deflection arrangements contacting the material web, where the deflection arrangements displace against each other and/or define section of the material web progress in different directions, and delivering the coating medium from a silt nozzle or a glide layer nozzle to the assigned surface of the material web by using the curtain coater in the form of a single- or multi-layered curtain under gravitation effect and optionally effect of other forces in a coating section (16) of the material web course, which runs horizontally or corresponding to a radius of a deflection roller (20, 22) or a supporting roller of the curtain coater or has a greater movement speed component in horizontal direction than in vertical direction. The drying device subjecting the coating medium to a heat effect passes the material web into a drying section of the material course following the coating section to partially dry the applied coating medium. The material web is deflected in the course and/or at the end of the coating section to a deflection angle by a first deflection arrangement optionally comprising the deflection roller and the supporting roller if present, so that the material web initially vertically downwardly runs in a first section of the material web course directly following to the deflection of the material web in the course and/or at the end of the coating section or has the greater movement speed component in vertical direction downwardly as before the deflection. The first section of the material web course directly following to the deflection of the material web in the course and/or at the end of the coating section is a drying section, in which the drying device passes the material web and subjects the coating medium to a heating device. The material web is supplied to the drying device of the drying section after the deflection in the course and/or at the end of the coating section, so that the heat effect of the drying device begins on the coating medium at a level deeply-lying opposite to the coating section. The material web runs in the drying section and/or after the deflection by the first deflection arrangement, in the case of a further deflection of the material web following in running direction of the material web before the further deflection and in vertically downward manner and the drying device has greater movement speed component in vertical direction downwardly as before the deflection than in the horizontal direction. The material web passes into the first section of the material web course directly followed to the first deflection arrangement or has the greater movement speed component downwardly in vertical direction than in the horizontal direction. The material web passes in the drying section and/or in the first section of the material web course directly followed to the first deflection arrangement and/or a contactless deflection arrangement passes in a second section of the material web course subsequently after a second deflection arrangement.