General Dynamics Ordnance and Tactical Systems- Canada Valleyfield Inc. Patent applications |
Patent application number | Title | Published |
20150284301 | METHOD OF MANUFACTURING MULTI-LAYERED PROPELLANT GRAINS - A method of manufacturing a multi-layered propellant grain is provided. The method of the present disclosure simplifies the setup necessary to produce multi-layered propellants by using industrial equipment that is more energy and space efficient than the machinery that is conventionally employed for such processes. The method comprises providing a first propellant formulation; providing a die configured to provide a structure having an outer shell and a hollow interior when material is extruded therethrough; extruding the first propellant formulation through said die, to produce a first propellant layer having an outer shell defining a hollow interior in the form channel having open ends; providing a second propellant formulation, said second propellant formulation being of low viscosity; injecting said second propellant formulation into said channel defined by said first propellant layer to form a second propellant layer disposed in said channel; and hardening said second propellant layer. The first and second propellant layers have different rates of burning. | 10-08-2015 |
20150042008 | CONTINUOUS CELLULOID TWIN SCREW EXTRUSION PROCESS - The present disclosure relates to a continuous extrusion process for producing a celluloid article including several steps and a celluloid article prepared by the continuous extrusion process. | 02-12-2015 |