US 2003/0145785 A1 · Application device

Abstract

A device (510) for the direct or indirect application of liquid or pasty application medium (516) by means of an applicator unit (512) to a material web (520), in particular of paper or board, comprises a device (570) upstream of the applicator unit (512) in the running direction (L) of the substrate (U) in order to attenuate the air boundary layer (G) carried along by the substrate (U). The attenuation device can in this case comprise a sealing element (570) which is pressed in a sealing manner against the substrate (U) and rolls on the latter substantially without slippage, and/or can comprise an electrode arrangement and/or can comprise an ultrasound source and/or can comprise a resilient diaphragm element acting without contact.

Claims31

Dependent claims

A device (410;

510;
610) for the application of liquid or pasty application medium (516) by means of an applicator unit (412;
512;
612) to a moving substrate (U),
the substrate (U), in the case of direct application, being the surface of a material web (420;
520;
620), in particular of paper or board, and, in the case of indirect application, being the surface of a transfer element, preferably a transfer roll, which then transfers the application medium to the surface of the material web, and
a device (470;
570;
670) for attenuating the air boundary layer (G) carried along by the substrate (U) being arranged upstream of the applicator unit (412;
512;
612) in the running direction (L) of the substrate (U),
characterized in that the attenuation device comprises a sealing element (470;
570;
670) which is pressed in a sealing manner against the substrate (U) and rolls on the latter substantially without slippage:

12 more elements

Dependencies are inferred from the claim text.

Application device

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Application device

Life of this patent

Abstract

Claims31