Double cylinder screen

Details Double cylinder screen Double cylinder screen

E - Fixed Constructions

21

B

166/70

E21B 43/08 (2006.01) B01D 29/11 (2006.01) B01D 29/48 (2006.01)

Patent

CA 1271415

Abstract A double cylinder screen comprises an inner reinforcing cylinder which performs a pressure-resisting function against an external pressure and an outer screen cylinder which performs a screen function. The inner reinforcing screen comprises inner rods disposed cylindrically at a predetermined interval in the axial direction of the screen and a spiral reinforcing member wound on the outside of the inner rods and welded to the inner rods. The outer screen cylinder comprises screen rods disposed at a predetermined interval in the axial direction on the outer periphery of the inner reinforcing member and a wire wound spirally about the outside of the screen rods and welded to the screen rods. The width of a slit of the reinforcing member is larger than the width of a slit of the wire. The double screen cylinder is improved in its strength and can be manufactured without requiring a costly jig.

526280

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