Powder purging apparatus and method

摘要

Systems, methods, and apparatus are provided for purging charged powder particles from a mixture of ferromagnetic carrier particles and said powder particles. One example embodiment may include a powder purging apparatus comprising a support surface comprising a first side for supporting said carrier particles; a plurality of magnets, arranged on a second side of said support surface for generating magnetic fields at said first side to attract said carrier particles for forming a magnetic brush of said carrier particles, said magnetic fields and said support surface moveable relative to each other; an attracting surface facing said first side and spaced apart therefrom; and a field generator adapted for generating an electrical field between said attracting surface and said support surface for attracting said powder particles away from the carrier particles and towards said attracting surface, wherein said magnetic brush of carrier particles is spaced apart from said attracting surface.

主权项

1. The powder purging apparatus for purging charged powder particles from a mixture of ferromagnetic carrier particles and said powder particles, comprising:
a support surface comprising a first side for supporting said carrier particles; a plurality of magnets, arranged on a second side of said support surface opposite from said first side, for generating magnetic fields at said first side to attract said carrier particles to said first side for forming a magnetic brush of said carrier particles, wherein said magnetic fields and said support surface are moveable relative to each other; a driving element adapted for driving movement of said magnetic fields relative to said support surface; an attracting surface facing said first side and spaced apart there from; and a field generator adapted for generating an electrical field between said attracting surface and said support surface for attracting said powder particles located at the magnetic brush away from the carrier particles and towards said attracting surface, wherein said magnetic brush of carrier particles is spaced apart from said attracting surface.