B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
205/10
B21D 28/28 (2006.01) B21C 37/29 (2006.01) B21D 39/04 (2006.01)
Patent
CA 1089410
Abstract of the Disclosure Nipples are extruded on metal parts around holes therethrough by providing an initial hole having a wide portion and a narrower portion, the wide portion having the diameter desired in the finished hole. A tapered mandrel is forced through the initial hole, extruding a nipple and resulting in a hole of the desired diameter.
317313
Combustion Engineering Inc.
Smart & Biggar
LandOfFree
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