277,037. Aeldert. A. Sept. 6, 1926, [Convention date]. Openers, cleaners, &c.-Apparatus for chopping up and cleaning paper, rags, and the like comprises a conical rotating sieve a througlt which the impurities are sucked inwardly. The sieve mav be provided in known manner with teeth, claws, knives, or the like d. A hopper A for the introduction of the material is mounted at the narrow end. The material passes between the sieve a and the outer casing b and is discharged at B.