Body having a hermetically sealed opening tear - by welding together overlapping edges and terminating the tear in a tongue

摘要

An insertion to mfr. a body from metal plate, the body having an opening tear. The tear terminates in a tongue, the overlapping edges of which are welded together. The tear is characterised in that welding intensity is decreased such that at the opening tear the edges are linked solely by melted tin, or welding is interrupted between the overlapping edges and covered by a sealant material to give hermetic sealing.