[rob74]

"American engineer Paul Pleiss" - with a suspiciously German-sounding name however, so it might be no coincidence that he was the first to notice this German invention. Unfortunately the only info I could find on Mr. Pleiss online was that he invented the jerrycan, so I couldn't find anything to confirm my suspicion...

[otherme123]

Maybe a bit more info here: https://www.thefabricator.com/thewelder/blog/arcwelding/the-...