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Schall absorbierender Aktenordner

File folder has two covers and back for connecting both covers, where back and covers are partially provided with sound-absorbing planar formation that is formed by single-layer coatings, particularly micro-perforated elements
 
: Leistner, Philip

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Frontpage ()

DE 102012205029 A1: 20120328
Deutsch
Patent, Elektronische Publikation
Fraunhofer IBP ()

Abstract
The file folder has two covers (2) and a back (1) for connecting both covers, where the back and the covers are partially provided with a sound-absorbing planar formation that is formed by single-layer coatings, particularly micro-perforated or micro-slotted elements. The sound-absorbing planar formation is formed by multi-layer material combinations, for example protecting layers with greater perforation and in-between lying tissue- or nonwoven layers.

: http://publica.fraunhofer.de/dokumente/N-270981.html