초록 ▼

The permeable drum for needling tissues, nonwovens, or other permeable materials of a certain width consists of a normally perforated sheet metal drum on which strips that are thin and extend axially over the length of the drum are arranged with small distances between them around the drum. The stri

The permeable drum for needling tissues, nonwovens, or other permeable materials of a certain width consists of a normally perforated sheet metal drum on which strips that are thin and extend axially over the length of the drum are arranged with small distances between them around the drum. The strips radially support a very thin sheet metal jacket with microfine perforations and produce a uniform flow of liquid through the material that rests externally against the sheet metal jacket. The strips can be joined together for example to form a honeycomb profile and thus uniformly transfer the hydrodynamic load developed during needling to the screen drum.

대표청구항 ▼

[ I claim:] [1.] Device for hydrodynamic solidification of fleeces, tissues, or paper, or needling of fabrics or wovens with a liquid processing means sprayed by a plurality of nozzles, said device comprising a sheet metal drum associated with said nozzles, said drum being permeable and serving as a

[ I claim:] [1.] Device for hydrodynamic solidification of fleeces, tissues, or paper, or needling of fabrics or wovens with a liquid processing means sprayed by a plurality of nozzles, said device comprising a sheet metal drum associated with said nozzles, said drum being permeable and serving as a rigid supporting element for material during water needling, said drum being covered at its circumference by a liquid-permeable thin sheet with microfine perforations, and with a support which is unstable in itself and made of strips being provided between the liquid-permeable sheet and the sheet metal drum, for the sole purpose of increasing the distance between the sheet metal drum and the liquid permeable sheet, with the strips being arranged with small constant distances between them uniformly over the entire circumference of the sheet metal drum, and with the sheet metal drum directly abutting radially inner edges of strips and with the liquid-permeable sheet directly abutting radially outer edges of the strips.