Abstract: A case for use with a propellant charge has a substantially cylindrical envelope. The envelope is formed from a combustible material. At least one support, that is formed from a combustible material, is coated to a substantially uniform thickness on at least one reception section with an anti-wear additive. A mechanism, formed from a combustible material, positions the support relative to the envelope such that, after assembly, at least one empty space is defined between an inner surface of the envelope and the anti-wear additive.

Abstract: A device for joining a first container to a second container, in which a first face of the first container is alignable with a second face of the second container along a longitudinal axis, includes a first narrowed portion, a second narrowed portion and a sleeve. The first narrowed portion is disposed adjacent the first face of the first container. The second narrowed portion is disposed adjacent the second face of the second container. The sleeve is disposed around the first narrowed portion and is shaped to slide parallel to the longitudinal axis from a first position to a second position. The sleeve in the second position at least partially covers and threadedly engages a corresponding threaded portion of the second container. As a result, the device permits two containers to be joined securely yet disassembled quickly.