Patent ID: 9431796
Filing Date: 2016-08-30
CPC Classification: H01T

Claim Text:
1. A method for manufacturing a spark plug comprising the steps of: providing a center electrode; providing an insulator disposed externally of an outer circumference of the center electrode; providing a metallic shell disposed externally of an outer circumference of the insulator providing a ground electrode whose one end portion is joined to the metallic shell and whose other end portion faces the center electrode; providing a first tip which forms a gap in cooperation with the ground electrode or the center electrode, said first tip being disposed at the center electrode and/or the ground electrode and being joined to a tip-mating member; and transferring the first tip to a joining position where the first tip is joined to the tip-mating member, wherein the transfer step comprises a step of performing positional correction for the first tip before the first tip reaches the joining position and further comprising: the first feed device and the transfer chuck are configured such that transfer is repeated with a horizontal distance therebetween being fixed: there are simultaneously performed: the positional correction in the step (b) is performed in the course of return of the first feed device from the middle position to the feed position and in the course of return of the transfer chuck from the joining position to the middle position.