Plug of Pipe Joint

FIG. 1 is a perspective view of a plug of pipe joint showing our new design;

FIG. 2 is a front view thereof, the rear view being a mirror image of the front view;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof; and,

FIG. 5 is a top view thereof, the bottom view being identical to the top view.

The dash broken lines illustrate portions of the plug of pipe joint that form no part of the claimed design. The dot-dash broken lines illustrate the boundary of the claimed design and form no part thereof.