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US 5,705,108 AGranted
Method for making edge for loudspeaker diaphragm
AssigneeFoster Electric Company, Limited
InventorAkihiro Nonogaki
Life of this patent
Estimating the term…
Abstract
An edge for loudspeaker diaphragm is made by disposing a diaphragm one of a pair of mating molds, disposing a strip-shaped base material of the edge on the said one of the molds, and hot-molding them with the other mold mated with the one mold. Foaming action of the base material occurs, and an eventual foamed edge is integralized with the diaphragm.
Claims6
A method for making an edge for a loudspeaker diaphragm, comprising:
- disposing a premanufactured diaphragm on one of a pair of mating molds respectively including male and female edge-forming portions that form a predetermined edge shape upon mating,
- disposing a strip-shaped base material comprising a mixture of rubber as a main component and a foaming agent on the edge-forming portion of one of said mating molds, and
- mating said pair of molds to hot-mold said strip-shaped base material into a foamed edge with said predetermined edge shape and simultaneously integrating said foamed edge with said diaphragm.
Dependencies are inferred from the claim text.