The ornamental design for a supportingplate for affixingpaper sheets, as shown and described.
FIG. 1 is a bottom, left front perspective view of a supporting plate for
affixing paper sheets showing my new design;
FIG. 2 is a rear elevational view;
FIG. 3 is a right side elevational view drawn to an enlarged scale;
FIG. 4 is a top plan view drawn to the scale of FIG. 3; and,
FIG. 5 is a bottom, left front perspective view drawn to the scale of FIG.
1 with the paper retaining tabs on the right side thereof in a raised
position.