CPC B08B 9/0804 (2013.01) [B08B 9/0813 (2013.01); B08B 2209/08 (2013.01)] | 18 Claims |
1. An apparatus comprising:
a curved surface having an inner edge and an outer edge;
an inner wall having a first height located at the inner edge of the curved surface;
an outer wall located between the inner edge and outer edge of the curved surface and having a second height that is less than the first height;
a plurality of notches located at the outer edge of the curved surface; and
a feed pipe having an outlet located between the inner wall and outer wall.
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