B - Operations – Transporting – 65 – G
Patent
B - Operations, Transporting
65
G
302/23
B65G 53/14 (2006.01) B05B 7/14 (2006.01)
Patent
CA 1036642
ABSTRACT OF THE DISCLOSURE Powder conveying apparatus for conveying powder paint from a container to a device for applying the powder paint com- prises two flow constrictors defining vertical powder flow passages in vertical axial alignment and axially spaced apart from one another to define an annular gap between opposed ends of the flow constrictors. A powder inlet opening communicating with the lowermost end of one of the flow constrictors is pro- vided at the underside of the apparatus and in axial alignment with the flow passages. A vertical powder outlet passage com- municates with the other flow passage whereby the powder inlet opening, the flow passages and the powder outlet passage provide a straight-through vertical flow path. A compressed gas supply passage communicates with the annular gap for supplying com- pressed gas through the latter, whereby powder is drawn in through the powder inlet opening and entrained along the flow path, and the flow constrictors are relatively adjustable to adjust the size of the annular gap and thereby to adjust the rate of flow of the powder through the apparatus. A vibrator is provided for vibrating the apparatus to improve the powder flow therethrough, the compressed gas supply passage communica- ting with the annular gap through the vibrator, whereby the compressed gas both operates the vibrator and entrains the powder. At least one fixedly open by-pass passage communicates with the compressed gas supply passage and the powder outlet and by-passes the annular gap and the second powder flow con- strictor.
260843
Allen Norman G.
Parker Peter R.
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