US 11,718,049 B2
Treatment machine for a flexible material web, in particular plastic film, which can be passed through a treatment furnace
Christoph Höglauer, Waging am See (DE); Markus Unterreiner, Marquartstein (DE); and Anton Wettemann, Vachendorf (DE)
Assigned to BRÜCKNER MASCHINENBAU GmbH, Siegsdorf (DE)
Filed by BRÜCKNER MASCHINENBAU GmbH, Siegsdorf (DE)
Filed on Oct. 2, 2019, as Appl. No. 16/590,437.
Claims priority of application No. 10 2018 124 521.1 (DE), filed on Oct. 4, 2018.
Prior Publication US 2020/0108572 A1, Apr. 9, 2020
Int. Cl. B29C 71/02 (2006.01); B29C 55/02 (2006.01)
CPC B29C 71/02 (2013.01) [B29C 55/02 (2013.01); B29C 2071/022 (2013.01)] 12 Claims
OG exemplary drawing
 
1. 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.