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AssigneeAktiebolaget Bofors
InventorsUlf Melhus, Mats Olsson, Nils-Gunnar Bjorkqvist, Lars-Erik Bjorn, Dennis Taylor
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The present invention relates to a method and an apparatus for production of cartridged propellant charges for barrel weapons with charge weights up to 1.4 kg/liter. According to the invention, more granular or particle-shaped propellant powder is driven down or compacted than can be housed in free-running condition within the same volume by means of a piston or plunger (6) in a single stage down into a case (4) the inside of which is coated with a friction-reducing coating. The piston or plunger (6) can then be provided with an elastically deformable leading part (7) of e.g. rubber and/or with a conically tipped leading end (7a). According to one variant of the invention the powder is pressed down into a bag (12, 13) of combustible fibre material which has been inserted in advance down into the case (4) coated internally with a friction-reducing coating or which has itself been impregnated with a friction-reducing coating. The invention also enables the powder to be compacted to advantage at a temperature that is higher than the room temperature.
A method of producing cartridged propellant charges for barrel weapons with high charge densities by pressing down and compacting by means of a piston or plunger more granular or particle-shaped propellant powder into a cartridge case than said cartridge case holds of free-running propellant powder, comprising the steps of providing a cartridge case coated internally with a friction-decreasing coating pressing the entire amount of propellant powder into the coated cartridge case by means of a movable plunger in one single stage, thereby producing a compacted cartridged charge for propelling a projectile to be mounted in the neck of the case.
A method of producing cartridged propellant charges for barrel weapons with high charge densities by pressing down and compacting by means of a piston or plunger more granular or particle-shaped propellant powder into a cartridge case than said cartridge case holds of free-running propellant powder, comprising the steps of providing a cartridge case coated internally with a friction-decreasing coating and pressing the entire amount of propellant powder into the coated cartridge case by means of a movable plunger in one single stage;
Dependencies are inferred from the claim text.