The ornamental design for a double door for a postal sorting machine, as shown and described.
The nature and intended use is as an access door for a cabinet in a postal sorting machine.
FIG. 1 is a front view of a double door showing our new design;
FIG. 2 is a top end view of the double door of FIG. 1; and,
FIG. 3 is a perspective view of a double door of the invention, shown as installed on a postal sorting machine cabinet, with the sorting machine cabinet shown in phantom lines.
The two undisclosed rear faces of the doors are substantially the same as the configuration as viewed from the outside thereof, without the handles.
The broken line showing of a postal sorting machine is included for the purpose of illustrating environmental structure and forms no part of the claimed design.