Laminated core and method of producing laminated core

Details Laminated core and method of producing laminated core Laminated core and method of producing laminated core

2002-05-23

2011-11-01

Watkins, III, William P (Department: 1783)

Stock material or miscellaneous articles

Structurally defined web or sheet

Including aperture

C428S131000, C428S134000, C428S137000, C428S156000, C428S172000, C428S174000, C428S594000, C310S216048

Reexamination Certificate

active

08048509

ABSTRACT:
Thin sheets of magnetic material are subjected to a pressing process to stamp many sheets of core pieces, and caulking projections defined in the core pieces are caused to go into connecting through holes defined in the core pieces for connecting and laminating to produce a laminated core. In lower layer of the core pieces having the caulking projections arranged in different positions seeing in plan, at least two sheets of core pieces and other core pieces having the connecting through holes are provided. The caulking projections defined in the core pieces have projecting length of at least twice of thickness of the core pieces, and are fitted in the connecting through holes, so that upper and lower laminated core pieces are unified.

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