Patent ID: 6042762
Filing Date: 2000-03-28
Classification: B29C

Abstract:
film producing system comprising a film extruding nozzle (1) for producing said film out of a melt, said nozzle having a wide slot corresponding to a film width to be produced, said system further comprising a cooling station (2) including a cooling roller (2A) rotatably mounted downstream of said nozzle (1) as viewed in a film advance direction from said nozzle to said cooling station, and further including downstream of said cooling station (2) at least one film treatment station (4) for the treatment of extruded melt film, a detouring station (3) positioned downstream of said cooling roller (2A) and upstream of said at least one film treatment station (4) for passing film to said treatment station under normal operating conditions, said detouring station (3) comprising a support (6), a roller set comprising at least one first guide roller (3C) rotatably mounted to said support (6), a mounting (7) in said detouring station (3), a press-on roller (3B) mounted for rotation on said mounting (7) and for displacement toward and away from said guide roller (3C), a first drive (18) connected to said press-on roller (3B) for rotating said press-on roller and a second drive (19) connected to said mounting (7) for displacing said press-on roller (3B) relative to said guide roller (3C) between a press-on roller rest position away from said guide roller under said normal operating conditions and a press-on roller working position in contact with said guide roller (3C), and a controller (23) for controlling said system so that said press-on roller in said press-on roller working position causes said film to be detoured in response to an abnormal working condition signal from said controller (23).