Patent ID: 7537029

Claim:
A jet weaving machine comprising: a main blow nozzle adapted to blow a transport fluid and therewith insert a weft thread into a loom shed of said jet weaving machine, wherein said main blow nozzle comprises a mixing tube having an inlet end facing away from said loom shed, an outlet end facing toward said loom shed, a mixing tube passage extending from said inlet end to said outlet end, and a clamp opening that opens into said mixing tube passage closer to said outlet end than to said inlet end; a thread clamping abutment arranged bounding said mixing tube passage; and a thread clamping device comprising an actuator and a lever; wherein: said actuator is arranged outside of said mixing tube and comprises at least one elastomeric deformable chamber, which has an actuating medium port communicating into a void space defined within said chamber, and which is elastically deformable so as to undergo an elastic deformation when an actuating medium is supplied into and/or removed from said void space through said port, said lever is fastened to said actuator arid arranged so that, due to said elastic deformation of said elastomeric deformable chamber, said lever and said actuator together undergo a tilting or pivoting movement between a clamping position and a non-clamping position, in said clamping position, said lever extends through said clamp opening and is positioned to clamp the thread between said lever and said thread clamping abutment, and in said non-clamping position, said lever is positioned so as to leave a space and not clamp the thread between said lever and said thread clamping abutment.