| 摘要 |
A food mixer having vertically disposed parallel shafts with integral helical intermeshing blades on each shaft rotated in opposite directions for selective use to move the food ingredients vertically upwardly or downwardly in a selectable direction in the mixing zone with or without rotation of a mixing bowl. The relative vertical spacing between the blades at their working overlap is adjustable by varying their relative rotational orientation angle to vary their phase relation therebetween whereby the benefits of a wide spacing and a narrow spacing may be had in the mixing overlap zone.
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