E.i. Dupont De Nemours and Company

Ingenieurgemeinschaft Wsp, Prof. Dr.-ing. C. Kramer, Prof. Dipl.-ing. H. J. Gerhardt M. S.

Ingenieurgemeinschaft Wsp, Prof. Dr.-ing C Kramer, Prof. Dipl.-ing H.j.

Eckehard Fiedler

Carl Kramer

Heinz Kuhlmann

A method and apparatus for transporting a web having at least one table element including at least one inclined blowing device ( ), at least one rounded hump ( ), and at least one sucking device ( ) between the at least one blowing device ( ) and the at least one rounded hump ( ). The rounded hump ( ) allows the sucking of air without any risk of tearing or breaking the web ( ). The limited amount of air ensures high transport forces, and increased efficiency of the transport system.

Web transport system

A nozzle array for levitational guidance of web material. The nozzle array includes a sequence of nozzle areas in the transport direction of the web which are peripherally encompassed at least in part by fanned jets and their width varies in the direction transversely to the web transport direction. The nozzle areas may be equipped with orifice nozzles. Located between the nozzle areas are return flow zones which may be configured as return flow passageways open towards the web, whereby their cross-section is flared in the direction of the edges of the nozzle array. The nozzle areas may be v-shaped relative to their longitudinal axis oriented in the transport direction of the web. Clusters of nozzle areas may be arranged juxtaposed as viewed in the web transport direction.

Nozzle array for levitational guidance of web material

An apparatus for levitational guidance of a continuous web of material for the purpose of its heat-treatment is configured of individual zones. The form ducting of the zones has the shape of an U in the vertical longitudinal center section above and below the web in each case, the legs of the U being located parallel to the transport direction of the web. The legs adjacent to the web are equipped on the side facing the web with levitation nozzle ribs or nozzle areas. In the legs facing away from the web, a radial fan is incorporated in each U, the delivery direction of which is directed towards the turn joining the two U legs. Heating means are arranged to advantage in the heating zones in the region between the two legs of the U. Coolers may be incorporated to advantage in the region of the turn joining the two U legs.

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Vaals, Netherlands

Eckehard Fiedler