Treatment machine for a flexible material web, in particular plastic film, which can be passed through a treatment furnace

A treatment machine for flexible material webs in the form of a plastic film, comprising:

• at least two successive zones in an extraction direction of the material web,
• at least one neutral zone is provided between the at least two successive zones in the extraction direction,
• the zone upstream from the neutral zone comprises a zone outlet wall provided with an outlet slot and/or a neutral zone wall, through which the material web exits in the extraction direction from the upstream zone into the neutral zone,
• the zone subsequent to the neutral zone in the extraction direction, comprises a zone inlet wall and/or a neutral zone wall, which is provided with an inlet slot through which the material web enters the trailing zone in the extraction direction,
• in the neutral zone, a nozzle arrangement is provided, adjacent to a zone exit wall and/or a leading neutral zone wall on the one hand, and/or adjacent to the zone inlet wall and/or a trailing neutral zone wall on the other hand, via which nozzle arrangement is provided, via which a gaseous fluid flow reaching a material web is generated,
• wherein:
• the nozzle arrangement of the nozzle arrangement leading in the neutral zone and/or the nozzle arrangement trailing in the neutral zone and/or a nozzle outlet opening of the nozzle arrangement is designed and/or arranged in such a way
• that a gaseous fluid flow (S) is generated,
• that the gaseous fluid flow is directed at an angle of greater than 0° and less than 45° in the direction of the adjacent zone exit wall and/or the leading neutral zone wall or the zone inlet wall and/or the trailing neutral zone wall,
• wherein
• the angle is an angle enclosed between the wall the gaseous fluid flow is directed on and the gaseous fluid flow, and wherein
• the wall the gaseous fluid flow is directed on is formed as a guide plate that is configured to guide and stabilize the gaseous fluid flow in the direction of the moving material web due to the Coanda effect, and
• that the nozzle arrangement is formed such that the gaseous fluid flow flows following the zone exit wall or the leading neutral zone wall or the zone inlet wall and/or the trailing neutral zone wall as far as the material web.