1891 Patent No. 14,980 sorting or sifting apparatus, Gustav Eisner, Hanau Maine

Patent No. 14,980 A.D.1891 Improvements in Sorting or Sifting Apparatus

"I, Gustav Eisner of Fallbachstrasse No. 2, Hanau-on-the-Main, Hesse, Germany, Brewer, do hereby declare the nature of this invention to be as follows: This invention relates to a sorting or sifting cylinder in which the sifting surface is formed of a series of parallel bars of elongated cross sectional form mounted in the ends of the cylinder in such a manner that the passage area between the bars can be altered by mans of a rotary movement imparted uniformly to all the bars..."

4 pages of text + 3 drawings which have been disbound from a larger volume.

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