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:
Jun. 02, 2020
Filed:
Dec. 31, 2018
Kokusan Parts Industry Co., Ltd., Toyonaka-shi, JP;
Yoshitaka Abe, Toyonaka, JP;
KOKUSAN PARTS INDUSTRY CO., LTD., Toyonaka-shi, JP;
Abstract
Provided is a method for manufacturing a gasket-constituting plate made of metal, in which a folded-back part whose thickness is set to be less than the thickness of a general part is provided at a periphery of a combustion chamber hole. The method includes, with a raw metal plate being held between a blank holder and a drawing die having an extrusion hole, extruding the raw metal plate in a thickness direction thereof by using a drawing punch as an extrusion tool to form a projecting part in the raw metal plate, and causing a tensile force to act on the raw metal plate due to the extrusion so as to elongate the raw metal plate, to form a thin peripheral wall part at an outer peripheral portion of the projecting part.