16-04-2020 дата публикации
Номер: US20200116461A1
Принадлежит:
The invention refers to a cylindrical sleeve () for receiving propellant powder () with a dimensionally stable jacket wall of combustible, felted fibre material and an insert () of a textile fabric in the jacket wall, and to a method of manufacturing a cylindrical sleeve (). 1645. A cylindrical case () for receiving propellant powder () with a dimensionally stable jacket wall of combustible , felted fibre material and an insert () of a textile fabric in the jacket wall ,characterized in that{'b': '5', 'the insert () is stretchable.'}25. The case according to claim 1 , in which the insert () is of single-layer construction and is expandable both axially and radially.35. The case according to claim 1 , in which the insert () has at least two or three layers claim 1 , of which a first layer is at least axially stretchable and a second layer is at least radially stretchable.45. The case according to claim 1 , in which the insert () consists of knitted fabric.55. The case according to claim 1 , in which the insert () claim 1 , with respect to the thickness of the jacket wall claim 1 , is arranged in the centre of the jacket wall or closer to an inside or an outside of the jacket wall.65. The case according to claim 1 , in which the insert () is arranged on an inside of the jacket wall.756. The case according to claim 1 , in which the insert () is in the form of a hose whose central axis coincides with the central axis of the case ().8. The case according to claim 7 , in which the hose is seamless.96. A method of manufacturing a cylindrical case () according to one of the previous claims claim 7 , comprising:immersing a screen shape in an aqueous pulp containing nitrocellulose and cellulose,applying negative pressure to conform the pulp to the screen shape so that a fleece is formed,pulling a tubular insert onto the screen shape and/or onto the flow formed.10. The method according to claim 9 , whereby the insert is drawn on before applying the negative pressure or as an ...
Подробнее