PURPOSE: To wrap and fix a sheet assuredly with a good appearance without disturbing the sheet while twisting a part of the sheet which is located higher than the truncated cone shaped head part by a method wherein the port of the sheet, which is located higher then the head part of a cylindrical body, is constricted around the central axis and clamped, end under a condition where tension is added further, the part of the sheet is twisted.

CONSTITUTION: A bottle 2, on which a porous air-permeable sheet for packaging 1 is wrapped, is held by an appropriate holding measure, and at the same time, is pinched by a rotation driving roller 3 and on idling roller 4. Then, upper and lower constricting boards 5a, 5b are brought closer toward the central axis of the bottle 2, and the sheet 1 is constricted toward the center and clamped of the central part, and is stretched in the central axis extending direction of the head part of the bottle 2 as shown by arrow B to give tension to the sheet. When the bottle 2 is rotated together with the sheet 1 by the rotation driving roller 3, only 8 part of sheet is, which is located higher than the bottle head, is twisted, and a port of sheet 1b, which is located of the bottle shoulder part, is constricted straight along the conical shape. Then, the twisted part of sheet 1a is bent and fixed by an appropriate band material.