Operating screw with spiral projection having cylindrical surface and retreat surface

   
   

The present invention is pertained to a cleaning member of a corona wire. An operating screw includes a core and an outer member enclosing the core. The core is rotatable about a rotation axis. The outer member is formed with a spiral groove. The outer member is provided with a plurality of curved surfaces and flat surfaces. The curved surfaces alternate with the curved surfaces, as viewed along the spiral groove of the outer member. The flat surfaces are retreated toward the rotation axis of the core than the curved surfaces.

Присытствыющий вымысел pertained к члену чистки провода короны. Работая винт вклюает сердечник и наружный член заключая сердечник. Сердечник ротатабелен о оси вращения. Наружный член сформирован с спиральн пазом. Наружный член обеспечен с множественностью изогнутых поверхностей и плоских поверхностей. Изогнутые поверхности чередуют с изогнутыми поверхностями, вдоль спиральн паза наружного члена. Плоские поверхности retreated к оси вращения сердечника чем изогнутые поверхности.

 
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