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AssigneeThe Dow Chemical Company
InventorsWilliam D. Carmody, William Robb Roy Park, Gordon E. Gould
Estimating the term…
Rolls of household or consumer type films or wrapping materials are provided with a curled leading edge that is ideally suited as a grasping tab for starting initial withdrawal of the film such as from a standard consumer type dispensing carton. The invention is applied to films exhibiting relatively high residual shrinkage or stress relaxation and is practiced by applying a coating to, or alternately solvent treating, the leading edge, in a manner that unbalances the rate of shrinkage at the opposite surfaces of the edge, thereby inducing a curling effect. Further attributes of such a starting feature would include easy identification of the leading edge, and the lessening of sensitivity to tear propagation such as from a notch or a like tear propagating flaw as may be left in the leading edge by the film cutter bar.
A roll of consumer type plastic wrapping film wound on a core, the film being characterized as a film having inherent residual shrinkage due to orientation imparted to the film in the longitudinal direction during the manufacture thereof, the improvement which comprises, a coating adhered to one surface of the leading edge of the roll to induce curling of said edge, to thereby promote easy identification and grasping of same to initiate the use of the roll.
A roll of film contained within a dispensing carton and wherein the leading edge of the roll is curled by selectively induced shrinkage thereof to promote easy identification and grasping thereof to initiate dispensing of the roll.
Dependencies are inferred from the claim text.