| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat insulating paper cover having no problem in a process for subjecting the heat insulating paper cover to draw forming to mount the same on the outer surface of a usual paper cup container for a light quickly prepared Chinese noodles, soups, miso soups or the like eaten by pouring hot water and having a novel wave falling shape and excellent display effect. SOLUTION: Many sets of fold lines (c), etc., and trough fold lines (d), etc., which correspond to the oblique sides of a large number of ultra-acute-angle triangles (b), etc., each having the end of a circular bottom panel as an apex and the end side of a disc blank as a bottom side, are provided to a disc-shaped heat insulating paper cover blank 4 having a circular bottom panel 5 demarcated by a fold line (a) at the center thereof at an equal interval to obtain the heat insulating paper cover formed into a cup shape same to the shape of the paper cup container 2 by draw forming. |
