Article: Minnesota, Wisconsin Inventors Develop Masking Material Roll

ALEXANDRIA, Va., Sept. 4 -- James F. Pitzen of Maplewood, Minn., Jeffrey J. Schwab of Cottage Grove, Minn., and Robert H. Heil of New Richmond, Wis., have developed a masking material roll.

According to the U.S. Patent & Trademark Office, the invention relates to a "roll of masking material comprising a coiled elongate thin flexible sheet, which sheet has longitudinal folds defining, in some embodiments with elongate edges of the sheet, edges of longitudinally extending portions of said sheet. Those longitudinally extending portions of the sheet include pleat-like portions of the sheet each having opposite major surfaces generally parallel with the axis of the roll, which pleat-like ...

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