PROBLEM TO BE SOLVED: To easily and accurately measure the fineness of powder and to save the labor for measuring operation by providing a sample powder supply part for introducing a specific amount of particle to a cell next to a Blaine air- permeability apparatus and providing a cell-carrying mechanism for passing the cell between both of them and a plunger for compressing the powder in the cell with a specific pressure. ;SOLUTION: Powder in a particle storage part 7b is mixed and agitated by a mixing agitation machine 8 for fluidizing according to the control of a control PC30 and is introduced into a cell 11 by a powder supply mechanism 7c. Then, the weight of the powder in the cell 11 is measured by a load cell 18b, the powder supply mechanism 7c is stopped when a specific amount of (for example, approximately 80 cc) is introduced into the cell 11, a cell-carrying mechanism 15 is operated, and the cell 11 is carried from the sample powder supply part 7 to a cell placement stand 21 of the Blaine air-permeability apparatus 20, and is located at the lower portion of a plunger 23. In this state, an air cylinder 24 is operated and the plunger 23 is lowered, powder in the cell 11 is compressed with a specific pressure for forming a bed, and the fineness of powder is measured.;COPYRIGHT: (C)2000,JPO
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