Paper lid production method

A method for producing a paper lid, the method comprising:

• a first step of holding down an outer edge area of a blank that is mainly made of paper with a pressing surface of a blank holder;
• a second step of forming an inner fitting portion in a central area of the blank by positioning the central area between a draw punch and a plunger and moving the plunger in a first direction toward the draw punch with the central area therebetween, while holding down the outer edge area with the pressing surface;
• a third step of forming an outer fitting portion in the central area, where the inner fitting portion is formed, while holding down the outer edge area with the pressing surface;
• after the third step, a fourth step of separating the plunger from the blank, and separating the blank holder from the blank after separating the plunger from the blank;
• a fifth step of making the blank holder having been separated from the blank stand by;
• and
• a sixth step in which the draw punch is moved in the first direction after the blank holder is made to stand by, whereby the outer edge area is re-contacted with the pressing surface of the blank holder and the draw punch is separated from the blank.