| 摘要 |
PROBLEM TO BE SOLVED: To provide a rubber screen, which is comprised of an upper layer screen and a lower layer screen, and in which the upper screen can be removed from the lower screen to be replaced while fixed firmly to the lower screen so as not to come off when being shaken. SOLUTION: According to the rubber screen, the lower layer screen 4 is formed by crossing horizontal rope-shaped materials 1 and vertical rope-shaped materials 2 and joining crossed parts to form sieve openings 3. Fitting implements 5 are fitted on both ends of the horizontal rope-shaped materials 1, respectively. The upper layer screen 9 is formed by crossing horizontal rope-shaped materials 6 and vertical rope-shaped materials 7 and joining crossed parts to form sieve openings 8. Engaging projecting strips are formed to be projected on one side end of the upper layer screen 9. The upper layer screen 9 is superimposed on the upper surface of the lower layer screen 4, and the locking projecting strips are inserted into the sieve openings 3 of the lower layer screen 4. The engaging projecting strips are locked and fixed between the horizontal rope-shaped materials 1 of the lower layer screen 4, which are tensed when the fitting implements 5 are fitted on a vibration sieve. COPYRIGHT: (C)2004,JPO&NCIPI
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