Abstract: A core plug apparatus includes an outer wall, an inner hub, a middle strengthening ring, and a plurality of interconnecting vanes. A vacuum seal wall covers one end of the plug to enable a vacuum lift force to be generated at one end of the roll of material. The vacuum seal wall includes a relatively thin central portion which can be displaced to allow the roll to be installed on a pair of mandrels, or to transport the roll using a rod extending from a lift device. The outer surface of the core plug may be textured to further increase frictional forces between the core plug and the inside wall of the core.

Abstract: A locking bolt is provided in a mount for receiving a gun barrel or other article. The locking bolt can be cammed relative to the mount from its normally locked position to an unlocked position to permit release of the gun barrel from the mount. The locking bolt is cammed to its unlocked position in response to direct engagement with a key inserted into an interior region of the mount and rotated relative to the mount. Thus, the mount is formed to include a keyway configured to permit the key itself to impart motion to a locking bolt to unlock the mount.

Abstract: A locking bolt is provided in a mount for receiving a gun barrel or other article. The locking bolt can be cammed relative to the mount from its normally locked position to an unlocked position to permit release of the gun barrel from the mount. The locking bolt is cammed to its unlocked position in response to direct engagement with a key inserted into an interior region of the mount and rotated relative to the mount. Thus, the mount is formed to include a keyway configured to permit the key itself to impart motion to a locking bolt to unlock the mount.