Patent Translate Powered by EPO and Google Notice This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate, complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or financial decisions, should not be based on machine-translation output. DESCRIPTION JPS59111390 [0001] Brief description of the drawings [0002] 1a and 1b are plan views of the flat diaphragm and the roll edge, and a sectional view thereof, FIG. FIG. 4 is a plan view of a corrugation formed at a corner of a roll edge showing one embodiment of the present invention and its sectional view, FIG. 4 and FIG. It is a measurement data figure which compared a sound pressure level. In the figure, 10 indicates a roll edge, 10a and 10b LJ flat portions, and IOC indicates a corrugation portion. 11-05-2019 1
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