Patent ID: 6701778
Filing Date: 2004-03-09
Classification: B05C,G01N

Abstract:
An apparatus for testing a coating fluid for runnability, the fluid having surface tension, viscosity, elasticity, and dilatant behavior which influence the falling acceleration of the fluid under the influence of gravity, the apparatus comprising:a pressurized container adapted to receive the fluid, the container having an outlet; the outlet opening and means for regulating a flow rate of the fluid through the outlet opening for creating a continuous stream of fluid falling from the opening under the influence of gravity; air nozzle means for blowing a stream of gas at the continuous stream at each of two different heights for deflecting the continuous stream at each of the two different heights by an angle that is proportional to a velocity times flow rate or momentum of the continuous stream, at each respective height; and means for calculating the acceleration of the continuous stream as a function of the velocity of the continuous stream at the two different heights and the distance between the two different heights.