Method for manufacturing a vehicle muffler

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United States of America Patent

PATENT NO 11746682
APP PUB NO 20220282649A1
SERIAL NO

17653503

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method for manufacturing a vehicle muffler includes: forming a tubular body (6; 91, 92) from a nonwoven fabric (2; 2A, 2B) composed of inorganic fibers (11) each being in a filament form; inserting and installing the tubular body (6) as a sound-absorbing material into a space (S) between an inner pipe (72; 81) and an outer pipe (71; 821, 822) of an inner-outer double pipe constituting a vehicle muffler. The tubular body (6) may be obtained by applying a binder (3) to one surface (2a) of the nonwoven fabric (2), then rolling the nonwoven fabric (2) into a tubular shape with the surface (2a) having the binder (3) applied thereto facing inward, infiltrating additional binder (3) into an outer peripheral surface of the tubular-shaped nonwoven fabric (2), and then heating the tubular-shaped nonwoven fabric (2) to a predetermined temperature to harden the binder (3).

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Patent Owner(s)

Patent OwnerAddress
NAKAGAWA SANGYO CO LTDINUYAMA-SHI AICHI 484-0917

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nakagawa, Hiroshige Inuyama, JP 12 66
Nakagawa, Noriaki Inuyama, JP 41 669

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