CPC Subgroup
B21D 51/38 Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
Full Title
Making hollow objects (from thick-walled or non uniform tubes B21K21/00) > characterised by the use of the objects (making heat exchangers B21D53/02) > Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
3 direct subcodes
Child Classifications
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- B21D 51/40 Making outlet openings, e.g. bung holes
- B21D 51/44 Making closures, e.g. caps (folded of thin metal foils in the way of making paper caps B31D5/00; making closures in conjunction with applying same B67B)