EP 1149233 B2 20080910 - METHOD OF PRODUCING A SOUND-ABSORBENT INSULATING ELEMENT AND INSULATING ELEMENT PRODUCED ACCORDING TO THIS METHOD
Title (en)
METHOD OF PRODUCING A SOUND-ABSORBENT INSULATING ELEMENT AND INSULATING ELEMENT PRODUCED ACCORDING TO THIS METHOD
Title (de)
VERFAHREN ZUM HERSTELLEN EINES SCHALLABSORBIERENDEN ISOLATIONSTEILS UND EIN NACH DIESEM VERFAHREN HERGESTELLTES ISOLATIONSTEIL
Title (fr)
PROCEDE DE FABRICATION D'UN ELEMENT D'ISOLATION PHONIQUE ET ELEMENT D'ISOLATION FABRIQUE SUIVANT CE PROCEDE
Publication
Application
Priority
- CH 0000058 W 20000202
- CH 19299 A 19990202
Abstract (en)
[origin: WO0046493A1] The invention relates to a method of producing a sound-absorbent insulating element with at least two metallic leaves (2, 3) in the form of films or sheets. According to said method, at least one of said elements is provided with knobs in such a manner that the limit of elasticity of the respective leaf (2, 3) is exceeded during the knobbing process, resulting in the formation of fissures (4, 11). Said fissures substantially help to improve the acoustic absorption capacity of the insulating element produced according to the inventive method.
IPC 8 full level
B21D 22/02 (2006.01); B21D 22/08 (2006.01); B21D 33/00 (2006.01); B21D 53/88 (2006.01); B60R 13/08 (2006.01); F01N 3/28 (2006.01); F01N 7/14 (2006.01); F01N 13/14 (2010.01); F02B 77/11 (2006.01); F02B 77/13 (2006.01); G10K 11/172 (2006.01)
CPC (source: EP US)
F01N 13/14 (2013.01 - EP US); F02B 77/11 (2013.01 - EP US); F02B 77/13 (2013.01 - EP US); Y10T 29/496 (2015.01 - EP US); Y10T 428/12361 (2015.01 - EP US); Y10T 428/12417 (2015.01 - EP US); Y10T 428/12479 (2015.01 - EP US)
Designated contracting state (EPC)
CH DE FR GB LI
DOCDB simple family (publication)
WO 0046493 A1 20000810; DE 50001089 D1 20030220; EP 1149233 A1 20011031; EP 1149233 B1 20030115; EP 1149233 B2 20080910; JP 2002536184 A 20021029; JP 3578994 B2 20041020; US 6555246 B1 20030429
DOCDB simple family (application)
CH 0000058 W 20000202; DE 50001089 T 20000202; EP 00901030 A 20000202; JP 2000597543 A 20000202; US 88935501 A 20010717