I believe JW got the process correct!
Back in the days when I used to perform the same procedure that js55 suggested, a group of researchers met on a weekly basis, (usually on the weekends although we had "emergency meetings" on a regular basis also) this group included myself, some of my best friends and a variety of lesser known female aquaintances besides our own girlfriends which broadened the demographic so to speak...
We would specifically sample different brands of canned beers, ales, malts of both domestic and imported brewers including the aforementioned "Sapporo" brand of canned brew... during our research, we found quite a few imported cans that were also welded using the same process (at least that is what most of us visually inspected) as Shane would more than likely agree that "Foster's" of Australia being included in the list! I especially do'nt recommend for anyone to attempt to crush one of those cans on their forehead either!!!
There was also a Canadian brand which for the life of me - I cannot remember the brand name that also had cans welded with the resistance seam weld process (probably because I used to drink soo much of it that since I "retired" from that profession many moons ago - on my own, the only thing that I can come up with is that I've developed some sort of "mental block" on that particular brand ;)).
Anywho, It's been fun to reminisce about some interesting aspects of a profession for which I'm no longer actively involved with... Then again, from what I've seen as of late - It's more than likely one of the best things I ever did in my life -remember I'm just talking about my own decision to "Retire"...
I'm not in any way suggesting to anyone here in this forum to do the same! Nor will I ever suggest that to anyone here! I will be available to anyone who might consider "retirement" only if they really are considering it... In other words, only serious inquiries (PM's only!!!) will be answered because, of it's serious nature!!! :)
Respectfully,
Henry