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. 25, 1979
Filed:
Jul. 27, 1978
Akira Morikawa, Nagoya, JP;
Yoshinori Narita, Nagoya, JP;
NGK Spark Plug Co., Ltd., Nagoya, JP;
Abstract
Apparatus for manufacturing a tubular honeycomb with adiabatic passages 107 formed integrally on its outer wall includes a first body 2 having a plurality of honeycomb shaped through holes 6, 7, 10 and a flange 3 secured to an extrusion pipe 1 carrying a plastic material under pressure, and a truncated conical portion 5 projecting coaxially from the flange. A second cylindrical body 12 has a truncated conical through hole disposed coaxially around the conical portion of the first body to define therebetween a first annular space 21 communicating with the honeycomb, and comprises truncated conical projection 15 alternately provided with slits 16 and holes 17 communicating with the first annular space. The first and second bodies are secured together by a stopper ring having a truncated conical through hole communicating with the slits and holes in the second body and disposed coaxially therearound to define therebetween a second annular space 22. The extruded tube thus has a honeycomb core 101 enclosed by a first pipe section 104, and ribs 105 extending radially outwardly from the first pipe section to a surrounding outer second pipe section 106.