CLIP TYPE SIEVE AND FRAME FOR MOCKER PARTICLE SIZE CLASSIFICATION DEVICE
Original Publication Date: 1994-Aug-31
Included in the Prior Art Database: 2004-Apr-07
Xerox Disclosure Journal
The known Mocker wet sieve apparatus is used to measure the coarse particle content of fine powders, like xerographic toner compositions. The sieve assembly contains an upper and lower Neoprene frame with a metal screen situated therebetween. Problems with the sieve assembly are that it is very diffrcult to disassemble, replace or calibrate the screen, the Neoprene absorbs moisture, and the assembly may not be exposed to oven drying temperatures exceeding about 100 degrees Centigrade. To avoid the aforementioned problems it is proposed that an all metal sieve assembly be used where the frame halves are comprised of a metal, like brass, and wherein the assembly is held together by three spring steel clips which are flush with the surface and located about 120 degrees from each other. The metal selected, like brass is relatively soft and thus provides an excellent seal when inserted at the outlet of the Mocker sieve apparatus.