Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having electrostatic element
Patent
1991-10-11
1994-06-07
Kuntz, Curtis
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Having electrostatic element
381202, 381204, H04R 2500
Patent
active
053197186
ABSTRACT:
A loudspeaker cone assembly having a generally conical cone body and an annular flexible suspension rim. In making the cone assembly, a cone body having an outer free edge is placed within a female mold having an annular channel configured to form the suspension rim with the free outer edge of the cone exposed to the channel. A predetermined quantity of liquid plastic foam is deposited into the channel which is then substantially closed by a male die so as to seal off the cone body adjacent its outer free edge. The foam is then expanded and cured so that the resulting annular rim is integrally impregnated into the free outer edge of the cone body and forms high density closed-cell outer skin surfaces on opposite sides of a low density closed-cell inner core to provide a suspension rim having improved flexibility, strength and durability. A color coating may be applied to selective exposed surface areas of the suspension rim.
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Kuntz Curtis
Le Huyen D.
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