The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 05, 2023
Filed:
Mar. 04, 2022
Nakagawa Sangyo Co., Ltd., Inuyama, JP;
Hiroshige Nakagawa, Inuyama, JP;
Noriaki Nakagawa, Inuyama, JP;
NAKAGAWA SANGYO CO., LTD., Inuyama, JP;
Abstract
A method for manufacturing a vehicle muffler includes: forming a tubular body () from a nonwoven fabric (A,B) composed of inorganic fibers () each being in a filament form; inserting and installing the tubular body () as a sound-absorbing material into a space (S) between an inner pipe () and an outer pipe () of an inner-outer double pipe constituting a vehicle muffler. The tubular body () may be obtained by applying a binder () to one surface () of the nonwoven fabric (), then rolling the nonwoven fabric () into a tubular shape with the surface () having the binder () applied thereto facing inward, infiltrating additional binder () into an outer peripheral surface of the tubular-shaped nonwoven fabric (), and then heating the tubular-shaped nonwoven fabric () to a predetermined temperature to harden the binder ().