| 摘要 |
<p>A double cylinder screen comprises an inner reinforcing cylinder (1) which performs a pressure-resisting function against an external pressure and an outer screen cylinder (2) which performs a screen function. The inner reinforcing screen comprises inner rods (3) disposed cylindrically at a predetermined interval in the axial direction of the screen and a spiral reinforcing member (4) wound on the outside of the inner rods and welded to the inner rods. The outer screen cylinder comprises screen rods (5) disposed at a predetermined interval in the axial direction on the outer periphery of the inner reinforcing member and a wire (6) 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. </p> |
