Method of making a cartridge
US4162645A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 19, 1976 |
| Grant date | Jul 31, 1979 |
| Priority date | — |
| Expiry date | Nov 19, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B7/12
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of making a cartridge, in particular a blank or propellant gas cartridge which has a casing of generally tubular form with a telescopically reverse in-folded star-crimp-closed integral tubular end section, and within which is contained a blank propellant powder charge, with a readily rupturable wad of low heat conductivity initial restraining mass formed between the propellant powder charge and the in-folded telescoping star-crimp-closed end of the casing, in which method the cartridge is formed by front loading a propellant charge and the low-heat-conductivity wad, and then star-crimping and telescopically reverse in-rolling the cartridge casing, after which the recessed in-rolled star-crimped casing is heat sealed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.