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(11) | EP 0 189 507 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Mixer |
(57) An improved mixer is proposed which has a casing, a rotary shaft extending horizontally
through the casing, an outer helical blade mounted on the rotary shaft for moving
the materials in one direction, an inner helical blade mounted on the rotary shaft
for moving the materials in the opposite direction, and an auxiliary screw blade for
moving the materials in the same direction as the inner blade does. |