US12422235 - Optical spectrum light-curable cartridge case sealant method and apparatus

The patent describes a method for sealing ammunition cartridges by applying a light-curable sealant to the inner surface of the cartridge case, which is then cured using optical light. This process creates an impermeable seal between the cartridge case and the projectile, enhancing the cartridge’s protection against air and moisture.

Claim 1

1. A method of sealing an ammunition cartridge during an ammunition manufacturing process, the method comprising the steps of: providing a cartridge case having a projectile receiving mouth with an inner surface; applying a thin circumferential film of a liquid light curable sealant to the inner surface; forming a cured thin circumferential film by curing the thin circumferential film of liquid light curable sealant using an effective curing light from an optical light spectrum; and assembling the ammunition cartridge including inserting a projectile into the mouth of the cartridge case with the cured thin circumferential film forming an air and moisture impermeable seal between the inner surface and the projectile. providing a cartridge case having a projectile receiving mouth with an inner surface; applying a thin circumferential film of a liquid light curable sealant to the inner surface; forming a cured thin circumferential film by curing the thin circumferential film of liquid light curable sealant using an effective curing light from an optical light spectrum; and assembling the ammunition cartridge including inserting a projectile into the mouth of the cartridge case with the cured thin circumferential film forming an air and moisture impermeable seal between the inner surface and the projectile.

Google Patents

https://patents.google.com/patent/US12422235

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12422235