Injector-feed device for pneumatic feed of powder

Details Injector-feed device for pneumatic feed of powder Injector-feed device for pneumatic feed of powder

1995-06-07

1997-04-01

Pike, Andrew C.

Conveyors: fluid current

With means to control conveying fluid or movement of load in...

Control of conveying fluid

406 31, 406 34, 406 93, 406138, 406143, 406153, B65G 5366

Patent

active

056159803

ABSTRACT:
An injector-conveyor device for the pneumatic conveying of powder, particularly powdered coating material, in order to measure the amount of powder conveyed, measures indirectly the vacuum produced in an injector (4) by having a stream of air measured with respect to its amount of flow or pressure drop in a throttled measurement channel (30) which places the outside atmosphere (32) in fluid communication with the vacuum chamber (10) of the injector (4). In order to avoid errors in measurement due to pressure variations in a powder suction channel (8), an equalization air inlet (56) is provided by means of which a small amount of equalization air is introduced into the powder suction channel (8) in order to make the pressure variations occurring therein of higher frequency and smaller with respect to the amplitudes of variation.

REFERENCES:
patent: 4747731 (1988-05-01), Nagasaka et al.

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