Spray device for coating articles with powder
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 21, 1987
Grant Date -
N/A
app pub date -
May 29, 1985
filing date -
May 30, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A feed channel is provided upstream of a powder-spraying discharge opening in a spray device, with a pipe having an injector which coaxially surrounds such pipe length for the coaxial introduction of accelerating gas. Downstream of the injector an elongated guide member is present in the feed channel. In this way the complete cross-sectional shape of the feed channel is progressively changed along the longitudinal axis of the feed channel to a cross-sectional shape which is annular and has a smaller cross section of flow passage. This results in a further accelerating of the stream of powder. The guide member and the region of the wall of the feed channel which surrounds the guide member at a distance therefrom consists of an insulating material on which powder particles which move past are charged electrically by friction. As a result of the consequent increase in speed of powder particles in the feed channel coupled with the reduction in cross section of the feed channel, an enhanced electric charging of the powder particles is obtained over a shorter distance.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully