FIG. 1 is an exploded perspective view of the inside of a one-third cut folder with expandable spine showing my new design;

FIG. 2 is a plan view of the inside of the front cover of FIG. 1 shown by itself for convenience of illustration;

FIG. 3 is a plan view of the inside of the rear cover of FIG. 1 shown by itself for convenience of illustration;

FIG. 4 is a plan view of the outside of the rear of FIG. 1 in assembled and closed condition;

FIG. 5 is a plan view of the outside of the front of FIG. 1 in assembled and closed condition;

FIG. 6 is a plan view of the inside of FIG. 1 in assembled and open condition;

FIG. 7 is a left end elevation view thereof;

FIG. 8 is a right end elevation view thereof;

FIG. 9 is a front elevation view thereof; and,

FIG. 10 is a rear elevation view thereof.