Method and apparatus for treating end portion of roll paper

Abstract

A device and method for treating the end portion of a paper from a paper roll mounted on a paper feed unit of a paper processer. The device arranged adjacent the paper roll is moved toward the paper roll until a presser roller mounted on the device is pressed against it. A cutter assembly facing the paper roll is pushed out so that its cutter will come into contact with the periphery of the paper roll. The cutter is then slid transversely from one end of the paper roll to the other to cut several turns of paper from the paper roll as broke. The broke is rolled out to be fed downwardly over a suction body through a pair of nip rollers and taken up by a take-up mechanism. Another cutter assembly is pushed forward into contact with the central part of the paper end rolled out together with the broke and moved widthwise to make a center cut in the paper end. A cavity forming device is then pressed against the paper end right under the center cut to form a square cavity there. A tab sticking device carrying a tab is pressed against the paper end just over the cavity to stick the upper part of the tab thereon. Two knives for V-cutting arranged at both sides of the paper end are moved laterally toward its center, while rewinding the paper roll, to make a V-cut extending obliquely from both sides toward the cavity. Adhesive is applied to the paper end along the cut edge. The paper end is rewound on the paper roll. The tab adhered to the paper end is then pressed by the presser roller against the surface of the paper roll to be stuck thereto. The broke is then discharged from the take-up mechanism.