The ornamental design for a portable blowing machinehood having a feedertray for blowing loose fill, as shown and described.
FIG. 1: is a front, right side perspective view of the blowing machine hood according to our design;
FIG. 2: is a rear, right side perspective view thereof;
FIG. 3: is a rear plan view thereof;
FIG. 4: is a right side plan view thereof;
FIG. 5: is a front, left side perspective view thereof;
FIG. 6: is a bottom plan view thereof; and,
FIG. 7: is a top left side perspective view thereof.
The broken lines showing the knife slot for cutting packaged bags of loose fill insulation and a left side viewing window form no part of the claimed design.