Abstract
An apparatus for delivering electrostatically charged particles to a carpet or fabric material is provided for controlling and removing dust from the material. The apparatus comprises a container for storing particles which are to be electrostatically charged and a tube or pipe for delivering the particles from the container to the carpet or fabric material. A source of compressed air or vacuum is provided for expelling particles at high velocity from the container to the carpet or fabric material. The tube or pipe is made of a material such that a minimum charge to mass ratio of ~1 × 10 -4C/kg is imparted to the particles by frictional contact on the inside of the tube or pipe when the particles are passed down the delivery tube or pipe at high velocity.
| Original language | English |
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| Patent number | CA2274017 C |
| IPC | B03C7/00, B08B6/00, A47L13/40 |
| Priority date | 4/12/96 |
| Publication status | Published - 17 Oct 2006 |