Abstract: An adhesive tape for winding around cables includes a carrier (T) with a first layer (1) made of woven fabric and with a second layer (2) made of a sewn bonded fiber fleece, wherein both layers rest fully upon each other. Between the first layer (1) and second layer (2) there is a first adhesive layer (3), wherein the second layer (2) features at least in part a second adhesive layer (4) which is arranged on the opposite side to the first adhesive layer (3). The first layer (1) features a surface weight of 100 to 200 g/m2, wherein the material of the first adhesive layer (3) comprises an adhesive and the material of the second adhesive layer (4) comprises an adhesive. The second layer (2) features a surface weight of 60 to 160 g/m2.

Abstract: The invention relates to the design of backflow orifices for a rotary compressor serving as a compressor for an engine. One example of such a rotary compressor is a roots blower. The fluid conveyed by two oppositely rotating rotors from an inlet to an outlet of the compressor flows back partially via the backflow orifices. The edges of the backflow orifices are at a varying height from an inner surface contour of the pump casing. The height variation contributes to a reduction in the noise generated by the compressor.

Abstract: The invention relates to the design of backflow orifices for a rotary compressor serving as a compressor for an engine. One example of such a rotary compressor is a roots blower. The fluid conveyed by two oppositely rotating rotors from an inlet to an outlet of the compressor flows back partially via the backflow orifices. The edges of the backflow orifices are at a varying height from an inner surface contour of the pump casing. The height variation contributes to a reduction in the noise generated by the compressor.