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A powder fluidizing system, comprising a pressure vessel, a powder container removably mounted within the pressure vessel, and comprising a bottom sieve; a vibrator generating vibrations and transmitting the vibrations to the powder container above the sieve; and a guide directly secured under said

A powder fluidizing system, comprising a pressure vessel, a powder container removably mounted within the pressure vessel, and comprising a bottom sieve; a vibrator generating vibrations and transmitting the vibrations to the powder container above the sieve; and a guide directly secured under said powder container to the bottom sieve; wherein a bulk powder fed within the powder container is vibrated within the powder container and flows through the sieve to the guide, and a powder fluidizing method, comprising feeding a bulk powder within a powder reservoir maintained under pressure; vibrating the powder reservoir; and passing the powder through a sieve positioned at the bottom of the powder reservoir.

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1. A powder fluidizing method, comprising: feeding a bulk powder within a powder reservoir maintained under a pressure of up to 131 bars, the bulk powder having a particle size comprised in a range between 0.1 and about 100 micrometers;vibrating the whole powder reservoir, with the powder maintained

1. A powder fluidizing method, comprising: feeding a bulk powder within a powder reservoir maintained under a pressure of up to 131 bars, the bulk powder having a particle size comprised in a range between 0.1 and about 100 micrometers;vibrating the whole powder reservoir, with the powder maintained under pressure therein;discharging the thus fluidized powder through a sieve positioned at the bottom of the powder reservoir to a guide leading to a powder outlet, the method comprising maintaining a pressure differential between the powder reservoir and the powder outlet of about 0.5 bars. 2. The method of claim 1, wherein said vibrating the powder reservoir comprises using vibrations in a range between 1 and 5 KHz. 3. The method of claim 1, further comprising passing the powder through a sieve positioned at the bottom of the powder reservoir and sweeping the powder through the sieve using a brush axially mounted in rotation within the powder reservoir. 4. The method of claim 1, further comprising injecting a carrier gas into the powder reservoir. 5. The method of claim 1, further comprising stirring the powder within the powder reservoir by at least one spindle. 6. The method of claim 1, further comprising stirring the powder within the powder reservoir by a plurality of stir spindles mounted at a different height on an axial shaft within the powder reservoir. 7. The method of claim 1, further comprising stirring the powder within the powder reservoir by a plurality of stir spindles mounted at a different height on an axial shaft within the powder reservoir and having different orientations. 8. The method of claim 1, further comprising discharging the powder passed through a sieve positioned at the bottom of the powder reservoir to an applicator. 9. The method of claim 1, further comprising discharging the powder passed through a sieve positioned at the bottom of the powder reservoir to an applicator, the method comprising maintaining the powder reservoir at a pressure higher than a pressure in the applicator. 10. The method of claim 1, further comprising injecting a carrier gas into the powder reservoir and stirring the powder within the powder reservoir by at least one spindle, said method comprising selecting a rotation speed of the stir spindle, a frequency of the vibration and a flow rate of the carrier gas in relation to a bulk powder feeding rate. 11. A powder fluidizing system, comprising: a pressure vessel;a powder container removably mounted, and maintained under a pressure of up to 131 bars, within said pressure vessel, and comprising a bottom sieve; anda vibrator connected to said powder container, said vibrator causing said powder container to vibrate as a whole above said sieve;wherein a bulk powder of particle size comprised in a range between 0.1 and about 100 micrometers fed within said powder container maintained under pressure is fluidized within said powder container by the vibrations above said sieve, and flows through said sieve. 12. The system of claim 11, wherein said powder container further comprises at least one stir spindle, axially mounted in rotation within said powder container. 13. The system of claim 11, wherein said powder container further comprises a plurality of stir spindles, axially mounted in rotation at different heights within said powder container. 14. The system of claim 11, wherein said powder container further comprises a plurality of stir spindles, axially mounted in rotation, at different heights and with different orientations, within said powder container. 15. The system of claim 11, wherein said powder container further comprises a brush, said brush being axially mounted in rotation within the powder reservoir, and said brush sweeping the powder through the sieve. 16. The system of claim 11, wherein said pressure vessel comprises a carrier gas inlet. 17. The system of claim 11, comprising a powder discharge outlet.