Method of manufacturing a speaker diaphragm

Details Method of manufacturing a speaker diaphragm Method of manufacturing a speaker diaphragm

1982-06-21

1984-11-27

Moon, Charlie T.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

294695, 156197, 181168, 181170, 428116, B29D 1700, B21D 3500

Patent

active

044843836

ABSTRACT:
A multi-layer block to be developed into a disk having a honeycomb construction is initially developed into a columnar block, and then the bottom of the columnar block is radially developed for obtaining a core of a speaker diaphragm. A suitable circular thin layer is attached to the top and bottom of the core to complete a diaphragm. The columnar block may be developed by means of a cone-shaped tool into a truncated cone, and this truncated cone may be further developed into a flat disk by applying a force to the top thereof. Since the forces on development are applied to the block uniformly, the density of hexagonal sections of the honeycomb construction is uniform throughout the entire circumference of the core providing superior speaker characteristics.

REFERENCES:
patent: 3136674 (1964-06-01), Dunkle et al.
patent: 3169251 (1965-02-01), Humes
patent: 3169898 (1965-02-01), Kazimi
patent: 3658974 (1972-04-01), Low
patent: 4055732 (1977-10-01), Yoshimura et al.
patent: 4194255 (1980-03-01), Poppe
patent: 4209162 (1980-06-01), Petiau

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