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1. (WO1989000372) MEMBRANE FOR A LOUDSPEAKER
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1989/000372 International Application No.: PCT/EP1988/000570
Publication Date: 12.01.1989 International Filing Date: 30.06.1988
Chapter 2 Demand Filed: 22.02.1989
IPC:
H04R 7/10 (2006.01) ,H04R 7/12 (2006.01) ,H04R 7/26 (2006.01)
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
R
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
7
Diaphragms for electromechanical transducers; Cones
02
characterised by the construction
04
Plane diaphragms
06
comprising a plurality of sections or layers
10
comprising superposed layers in contact
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
R
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
7
Diaphragms for electromechanical transducers; Cones
02
characterised by the construction
12
Non-planar diaphragms or cones
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
R
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
7
Diaphragms for electromechanical transducers; Cones
26
Damping by means acting directly on free portion of diaphragm or cone
Applicants:
E W D, ELECTRONIC-WERKE DEUTSCHLAND GMBH [DE/DE]; D-7730 Villingen-Schwenningen, DE (AllExceptUS)
ELEKTROTECHNIK EHMANN GMBH [DE/DE]; Bernbrunnerstr. 54 D-6953 Gundelsheim-Höchstberg, DE (AllExceptUS)
THIELE, Karl-Heinz [DE/DE]; DE (UsOnly)
EHMANN, Jürgen [DE/DE]; DE (UsOnly)
HARBARTH, Klaus [DE/DE]; DE (UsOnly)
Inventors:
THIELE, Karl-Heinz; DE
EHMANN, Jürgen; DE
HARBARTH, Klaus; DE
Agent:
KÖRNER, Peter; E W D, Electronic-Werke Deutschland GmbH Göttinger Chaussee 76 D-3000 Hannover 91, DE
Priority Data:
P 37 22 832.303.07.1987DE
P 37 44 356.929.12.1987DE
Title (EN) MEMBRANE FOR A LOUDSPEAKER
(FR) MEMBRANE POUR HAUT-PARLEURS
Abstract:
(EN) A membrane for a loudspeaker is designed so as to facilitate manufacture and to improve the tone of the loudspeaker. The membrane consists of a first plastic film (5a) which serves to retain the shape and a second plastic film (56) laminated to the first film which serves to damper partial oscillations. The membrane is particularly suitable as a conical membrane for a loudspeaker for a television receiver.
(FR) Une membrane pour haut-parleurs est conçue de façon à simplifier sa production et à améliorer la sonorité du haut-parleur. La membrane (5) se compose d'une première pellicule en plastique (5a) qui sert à rendre la membrane indéformable et d'une deuxième pellicule en plastique (5b) contrecollée sur la première et qui sert à amortir des vibrations partielles. Cette membrane convient notamment comme membrane conique de haut-parleurs de postes récepteurs de télévision.
Designated States: JP, KR, US
European Patent Office (AT, BE, CH, DE, FR, GB, IT, LU, NL, SE)
Publication Language: German (DE)
Filing Language: German (DE)
Also published as:
EP0366693US5162619KR1019890702402