Applicator Gun With Substantially Straight-Through Flow Paths

Disclosed is an improved applicator gun for mixing two materials passed through the gun under pressure, an A material and a B material, usually a resin and a hardener. The improved gun has substantially straight-through flow paths that beneficially permits the gun to be used with high viscosity materials and/or highly filled materials (large particles) and that beneficially minimize the effect of the pump "wink" associated with pump cycles. The preferred gun is air actuated, so it includes a valve body, a cylinder body for using pneumatic pressure to open and close the valve body, and a trigger body for selectively providing high pressure shop air to the cylinder body. The longitudinal axis of the cylinder body's cylinder and associated piston are uniquely offset from the plane containing the A- and B-paths so that the two paths can pass substantially straight through the cylinder body, and then through the valve body, prior to exiting the tip of the spray gun.