Wristwatch case and method of fixing pipe to wristwatch case

Details Wristwatch case and method of fixing pipe to wristwatch case Wristwatch case and method of fixing pipe to wristwatch case

2005-07-26

2005-07-26

Omgba, Essama (Department: 3726)

Metal working

Method of mechanical manufacture

Watch or clock making

C029S896310, C029S896330, C029S896340, C029S458000, C029S525000, C368S276000, C368S327000

Reexamination Certificate

active

06920692

ABSTRACT:
One wristwatch case, wherein a pipe is fixedly connected thereto and a connection interface between the wristwatch case and the pipe is not present substantially; the method of fixing the wristwatch, comprising the steps of providing a through-hole in the wristwatch case, press fitting the pipe of 0 mm or larger in press fitting tolerance (pipe outer diameter—through-hole diameter) between the through-hole and the pipe, and heating the wristwatch case after the press fitting step; the other wristwatch case, wherein a pipe is fixedly connected thereto through a diffusion layer; the method of fixing the pipe of the wristwatch case, comprising the steps of forming a through-hole in the wristwatch case, press fitting the pipe of 0 mm or larger in press fitting tolerance (outer diameter of pipe having a metal film formed on the surface thereof—diameter of through-hole) between the through-hole and the pipe having a metal film formed on the surface thereof, and heating the wristwatch case in vacuum or reducing gas atmosphere after the press fitting step.

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