Fluid through needle for applying multiple component material

A spray coating gun, comprising:

• a fluid delivery tip assembly comprising an inner passage;
• a hollow needle disposed within the inner passage of the fluid delivery tip assembly, wherein the hollow needle comprises exit holes extending at least partially radially from a hollow center of the hollow needle;
• a first passage configured to deliver a first spray fluid to a fluid tip exit of the fluid delivery tip assembly, wherein the first passage is defined by a volume between the fluid delivery tip assembly and the hollow needle, and the first spray fluid is delivered to the first passage from a first spray fluid inlet passage;
• and
• a second passage through the hollow needle, wherein the second passage is configured to deliver a second spray fluid to the fluid tip exit of the fluid delivery tip assembly through the exit holes of the hollow needle, the second spray fluid is delivered to the second passage from a second spray fluid inlet passage, and the second spray fluid inlet passage is coaxial with the first spray fluid inlet passage.

A spray coating gun, comprising:

• a fluid delivery tip assembly comprising an inner passage;
• a hollow needle disposed within the inner passage of the fluid delivery tip assembly;
• a first passage configured to deliver a first spray fluid to a fluid tip exit of the fluid delivery tip assembly, wherein the first passage is defined by a volume between the fluid delivery tip assembly and the hollow needle;
• and
• a second passage through the hollow needle, wherein the second passage is configured to deliver a second spray fluid to the fluid tip exit of the fluid delivery tip assembly;
• wherein the first spray fluid is delivered to the first passage from a first spray fluid inlet passage, the first spray fluid is delivered to the first spray fluid inlet passage from a first spray fluid cup, the second spray fluid is delivered to the second passage from a second spray fluid inlet passage, the second spray fluid is delivered to the second spray fluid inlet passage from a second spray fluid cup, the second spray fluid inlet passage is coaxial with the first spray fluid inlet passage, and the second spray fluid cup is located within the first spray fluid cup.