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Machine translation
1. (WO1998032551) DOUBLE-WALLED STRUCTURE AND METHOD AND ARRANGEMENT FOR PRODUCING THE SAME
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1998/032551 International Application No.: PCT/SE1998/000103
Publication Date: 30.07.1998 International Filing Date: 26.01.1998
Chapter 2 Demand Filed: 21.08.1998
IPC:
B21C 37/12 (2006.01) ,F01N 13/18 (2010.01) ,F16L 59/14 (2006.01) ,F16L 9/16 (2006.01) ,F16L 9/18 (2006.01) ,F24F 13/02 (2006.01) ,F24F 13/24 (2006.01)
Applicants: HULTBERG, Kent[SE/SE]; SE (UsOnly)
RANTA, Teuvo[SE/SE]; SE (UsOnly)
LINDAB AB[SE/SE]; S-269 82 Båstad, SE (AllExceptUS)
Inventors: HULTBERG, Kent; SE
RANTA, Teuvo; SE
Agent: AWAPATENT AB; P.O. Box 5117 S-200 71 Malmö, SE
Priority Data:
08/788,24627.01.1997US
9700253-927.01.1997SE
Title (EN) DOUBLE-WALLED STRUCTURE AND METHOD AND ARRANGEMENT FOR PRODUCING THE SAME
(FR) STRUCTURE A DOUBLE PAROI ET PROCEDE ET DISPOSITIF PERMETTANT DE PRODUIRE CETTE STRUCTURE
Abstract: front page image
(EN) In a method of producing a double-walled structure, such as a silencer for use in a ventilation duct system, use is made of an arrangement having a forming head (5) for forming helically-wound lock-seam tubing (2). In the forming head (5), a perforated metal strip (7) is helically wound together with an air-permeable cloth strip (13) such that the tubing (2) fed out of the forming head (5) has an outer cover of said cloth (13). The tube assembly consisting of the perforated tube and the cloth cover is provided with an outer tubular layer of insulating material and then inserted in a casing which makes the silencer complete.
(FR) L'invention concerne un procédé de production d'une structure à double paroi, telle qu'un silencieux destiné à un système de conduit de ventilation. On utilise un dispositif doté d'une tête de formage (5) permettant le formage d'un tube agrafé (2) enroulé en hélice. Dans la tête de formage (5), une bande de métal (7) perforée est enroulée en hélice avec une bande de tissu (13) perméable à l'air de telle façon que le tube (2) quittant la tête de formage (5) est doté d'un revêtement extérieur constitué de ce tissu (13). L'ensemble tube, constitué du tube perforé et du revêtement de tissu, est pourvu d'une couche tubulaire extérieure en matériau isolant puis inséré dans une gaine. On obtient ainsi un silencieux complet.
Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, GM, GW, HU, ID, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, US, UZ, VN, YU, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)