Process for producing loudspeaker diaphragm, loudspeaker diaphragm produced by the process, and loudspeaker with the diaphragm
AssigneePanasonic Corporation
InventorsTakashi Suzuki, Shinya Mizone
Life of this patent
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Abstract
In a process for producing a loudspeaker diaphragm, pulp is deposited on a paper-making mold in the presence of vortex stream of water having pulp dispersed therein in a paper-making bath. Pulp is deposited on the paper-making mold while at least the water having pulp dispersed therein is rotated by the vortex stream in the paper-making bath. Consequently, variation of pulp fiber orientation is suppressed, and a loudspeaker diaphragm with high reproducibility and stable quality is produced with a high productivity.
Claims10
A process for producing a loudspeaker diaphragm comprising:
- stirring pulp dispersed in water in a paper-making bath to form a vortex stream in the water in the paper-making bath;
- and
- depositing pulp on a paper-making mold while continuing to stir the pulp dispersed in the water in the paper-making bath to continue the vortex stream in the water.
A loudspeaker diaphragm comprising pulp fiber oriented axisymmetrically with respect to an axis passing the center of gravity of a loudspeaker, the loudspeaker diaphragm produced using a process comprising:
- stirring dispersed in water in a paper-making bath to form a vortex stream in the water in the paper-making bath;
- and
- depositing pulp on a paper-making mold while continuing to stir the pulp dispersed in the water in the paper-making bath to continue the vortex stream in the water.
A loudspeaker comprising:
- a frame coupled to a magnetic circuit;
- a loudspeaker diaphragm comprising pulp fiber oriented axisymmetrically with respect to an axis passing a center of gravity of the loudspeaker, the loudspeaker diaphragm coupled to an outer periphery of the frame and produced using a process for producing a loudspeaker diaphragm comprising:
- stirring pulp dispersed in water in a paper-making bath to form a vortex stream in the water in the paper-making bath;
- and
- depositing pulp on a paper-making mold while continuing to stir the pulp dispersed in the water in the paper-making bath to continue the vortex stream in the water;
- and
- a voice coil coupled to the loudspeaker diaphragm, one end of the voice coil being inserted into a magnetic gap of the magnetic circuit.
Dependencies are inferred from the claim text.