Patent ID: 9401587
Filing Date: 2016-07-26
CPC Classification: H01T

Claim Text:
1. A method for producing a spark plug for internal combustion engines, the spark plug having: a metallic shell that has an open front end and an open back end; a ceramic insulator, held in the shell, that has a front end and a back end that projects from the back end of the shell; a center electrode, embedded in the insulator, that has a back end that projects from the back end of the insulator and that has a front end that projects from the front end of the insulator; and a ground electrode in the form of a bridge that is attached to the front end of the shell; wherein an end piece made of a precious metal or a precious metal alloy is attached to the front end of the center electrode, and a counterpart is attached to the bridge opposite the end piece, between which is formed a spark gap that is set to a nominal width; the method comprises the steps of: