| 摘要 |
<p>Waste paper is pulped in a pulper 1 and then fed to a screening apparatus in which a sieve (6,8) which is substantially perpendicular to the rotor axis separates a circulating space from an accepts region which is sub- divided into two compartments (7 and 9) which correspond to areas of the sieve having holes of different sizes, so that two accepts streams are obtained. The hole diameters differ by at least 5 mm, the smaller holes being within the range 2 to 8 mm. The rejects fraction is discharged intermittently through valve 16. The coarser accepts fraction may be recycled to the screening apparatus while pulper 1 is being filled, so that the screening apparatus works almost continuously. Alternatively the coarser accepts is fed to a second screening apparatus. (Fig. 2 not shown). <IMAGE></p> |
