Powder weighing apparatus and powder weighing method

Details Powder weighing apparatus and powder weighing method Powder weighing apparatus and powder weighing method

2006-03-28

2006-03-28

Gibson, Randy W. (Department: 2841)

Weighing scales

Computer

Electrical

C177S103000, C222S077000

Reexamination Certificate

active

07019224

ABSTRACT:
A powder-weighing apparatus and a powder-weighing method having a high weighing speed and a high weighing accuracy are provided. For weighing powder within a predetermined allowable range of a target weight Wt, the powder-weighing apparatus may be configured to have a primary-charge weighing portion for weighing and retaining a weight W1of primary-charge powder smaller than the target weight Wt and at least two auxiliary-charge weighing portions each for weighing and retaining a weight W2of auxiliary-charge powder within a predetermined range of an auxiliary-charge weight Ws. When a weight W1of the powder retained in the primary-charge weighing portion is smaller than a lower limit of the predetermined allowable range of the target weight Wt, one of the two weights W2may be selected so that a sum (W1+W2) becomes closest to the target weight Wt, and the powder retained in the primary-charge weighing portion and the powder retained in the selected auxiliary-charge weighing portion are discharged.

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