Filter rod transmission device and method in tobacco industry

The invention relates to a filter rod transmission device which is used for transmitting filter rods in the tobacco industry to a conveying pipeline from a hopper. In the conveying direction of the filter rods, the filter rod transmission device includes a hopper which is used for receiving and storing the filter rods, wherein an atmospheric pressur pAtmos exists in the hopper; a pressure capsule which is used for receiving and temporarily storing the filter rods and has a channel for establishing and releasing pressure level; and a pressure chammer, in which a pressure Pdk>pAtmos exists, and is provided with a conveying unit, wherein the conveying unit includes a roller that can be rotationally driven and an expansion tank. The pressure capsule is sealed by sealing members having sealing components capable of being pneumatized on both the input side relative to the hopper and the output side relative to the pressure chamber. In order to change the pressure in the sealing components, the sealing components ca