Invention Application
- Patent Title: LONG CARTRIDGE CASE
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Application No.: US15451717Application Date: 2017-03-07
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Publication No.: US20180259309A1Publication Date: 2018-09-13
- Inventor: Jeffrey W. Carper , Christopher W. Snavely
- Applicant: National Machinery LLC
- Main IPC: F42B33/00
- IPC: F42B33/00 ; F42B5/28 ; B21C23/18
![LONG CARTRIDGE CASE](/abs-image/US/2018/09/13/US20180259309A1/abs.jpg.150x150.jpg)
Abstract:
A method and tooling for forming a cartridge case blank comprising backward extruding a tube from a length of wire stock in multiple backward extrusion steps with progressive tooling to obtain an intermediate blank that can be finish drawn without a preceding annealing step and which if otherwise not subjected to multiple backward extrusion steps, would require annealing prior to finish drawing to avoid tearing.
Information query