We claim the ornamental design for an air flow controller for heater of substrate processing apparatus, as shown and described.
FIG. 1 is a front, bottom and right side perspective view of an air flow ontroller for heater of substrate processing apparatus showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a cross-sectional view taken in the direction of line 8-8 in FIG. 2.
The broken lines immediately adjacent to the shaded areas represent the bounds of the claimed design while all other broken lines are directed to environment; the broken lines form no part of the claimed design.