PURPOSE: To ensure supply of materials by furnishing in a casing an eccentric rotor equipped with a plurality of slidable vanes, and providing a deaeration path for vacuum pump draw in that place of the casing where both the suction and discharge holes are shut off by vanes.

CONSTITUTION: A vacuum draw pump 1 has a vane pump 2 and a vacuum pump 3. Material in the form near solid state such as cream or sweet bean paste is transported from a hopper 8 by a plurality of vanes 7 supported slidably by an eccentrically arranged rotor 6. A deaeration path 11 is formed outside the material transport path of a pump casing 4 and opens to a space B to be shut by vanes 7 simultaneously with respect to the suction hole 9 and discharge hole 10. This deaeration path 11 is connected with a vacuum pump 3 via a separator 14. The space B is deaerated to become vacuum to ensure supply of material from the hopper 8 through the suction action. Because the material transported is free from extra voids, dividing into specified weights by a cutter near the discharge hole does not produce dispersion in the weight.