The ornamental design for a combined smokegasket and intumescent expanding seal device for sliding doors, as shown.
FIG. 1 is a front perspective view, viewed from above, of a combined smoke
gasket and intumescent expanding seal device for sliding doors showing my
new design;
FIG. 2 is a rear perspective view thereof, viewed from above; and
FIG. 3 is a horizontal sectional view thereof, taken along the line 3--3 of
FIG. 1.