Title: Treating airborne web material

Abstract: Web material is carried on air to advance the material in a fixed stable floating position through one or more decks of a treating plant, preferably a drier. The air is supplied through pairs of apertures arranged in the upper surface of blow-boxes distributed in the conveying path of the material which apertures eject the air in pairs of streams facing away from each other. To reduce deflection of the material between said pair of apertures the space between said apertures is supplied separately with a great volume of secondary air of the same static pressure as that prevailing on the upper surface of the material, which secondary air is taken along by ejector effect by the primary air streams ejected from the apertures of the blow-boxes.

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Inventors: Karlsson, Ingemar (Vaxjo, SE)

Application Number: 746093
Filing Date: 1976-11-30
Publication_date: 1979-02-06
Assignee: Aktiebolaget Svenska Flaktfabriken (Nacka, SE)
Primary Class(es): 34/460 226/7, 226/196.1, 242/615.11
Other Classes:
US Patent Ref:

3231165	Jan, 1966	Wallin et al.	302/29.
3622058	Nov, 1971	Vits	226/97.
3957187	May, 1976	Puigrodon	34/156.

Other Refs:
Primary Examiner: Camby, John J.
Assistant Examiner: Schwartz, Larry I.
Attorney: Dorfman, Herrell and Skillman