Method for the manufacture of loud speakers

Details Method for the manufacture of loud speakers Method for the manufacture of loud speakers

1978-01-23

1979-03-13

Gilden, Leon

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

29594, 1791155R, B21D 2200

Patent

active

041435370

ABSTRACT:
A method for the manufacture of loud speakers of the type comprising in particular a pot for containing a magnet, which method is characterized in that the pot is made in one single piece by pressing and, to this end, a concave blank is formed; it is then pressed to give the blank the shape of a cone, which latter is closed, and the part to be crimped onto the protective cover is then made, the interior diameter measured, the base flattened and the height measured.

REFERENCES:
patent: 2951190 (1960-08-01), Boermann
patent: 3191421 (1965-06-01), Coen
patent: 3319201 (1967-05-01), Coen
patent: 3453400 (1969-07-01), Coen

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