| 摘要 |
PROBLEM TO BE SOLVED: To provide a bag by which resources can be effectively utilized. SOLUTION: Perforations 25 and 26, and perforations 27 to 29 are provided at the center of a second surface section 12 of an envelope 10. At the same time, a perforation 21 is provided on the opening end 12a side of the second surface section 12. After being used as the envelope 10, the perforations 25 to 29 on the second surface section 12 of the envelope 10 are cut, and a book marker section M, a hole, and a bag section C are formed. Then, the perforation 21 is cut, and a band section is formed. Thus, a book cover is formed. Then, the face paper of a book is inserted from the hole, and is held by a space section S of the bag section C. Also, the rear face paper of the book is inserted from the hole, and is held by the band section, and a first surface section 11 is bent at a bending location. Thus, the book cover is fitted on the book. |
