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:
Jul. 20, 2021
Filed:
Dec. 17, 2015
Kuroda Precision Industries Ltd., Kanagawa, JP;
KURODA PRECISION INDUSTRIES LTD, Kawasaki, JP;
Abstract
When provisionally blanking a lamination sheet by using a punch for provisional blanking and a counter punch, the displacement of pilot holes located around the lamination sheet is minimized. The progressive die machine () comprises a pilot hole punch (), a punch () for provisionally punching an iron core laminate () from a strip (W) formed with pilot holes (P), a counter punch () provided in a lower die assembly () and configured to push the iron core laminate () against the punch (), a stripper plate () for separating the strip (W) from the provisional blanking punch after a provisional punching, a punch () for completely separating the iron core laminate from the strip. At least a part of the stripper plate () associated with the provisionally blanking is not in contact with the strip, and at least a part of an outer peripheral part of the provisionally blanked lamination sheet is formed with a connecting portion () connected to the strip.