| 摘要 |
PROBLEM TO BE SOLVED: To provide a paper cup not having level difference of a top curl part as a trunk adhesion part, having excellent sensation in the mouth, and causing no gap in the fitted top curl part when covering a cover cap so as not to cause leakage.SOLUTION: A paper cup is formed by: obtaining a cylindrical trunk member 10 by superposing and adhering both side end parts of a trunk member blank and forming a trunk adhesion part 11; forming a top curl part 13 with a spiral cross section by outward winding the upper peripheral edge of the trunk member; in the trank member blank, forming obliquely cut notch parts above a winding start line in both upper corner parts of the trank member blank; extending a resin part 16 to the outside of the notch part 14 in the upper corner part at a side superposed on the inside of the trunk adhesion part; making the end edge of the resin part parallel to the end edge of the notch part; and superposing the resin part on the other side end part in the top curl part of the formed trunk adhesion part.SELECTED DRAWING: Figure 1 |
