Importance

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Abstract

A powder spray coating device which includes an injector air flow controller having two alternate air flow paths for delivering feed air to an injector which delivers powder to a spray device. Optionally, the air flow controller also may have two alternate air flow paths for delivering supplemental air to the injector or downstream from the injector. In a first setting of a mode selector, feed air is delivered through a manually adjusted air valve and in a second setting of the mode selector the feed air is delivered through an automatically adjusted air valve. When supplemental air is provided, the supplemental air passes through a manually adjusted air valve in the first mode selector setting and through an automatically adjusted air valve in the second mode selector setting. A controller may detect articles to be coated and set the automatically adjusted feed air and supplemental air valves.

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First Claim