Cardboard sheet with pre-determined folding lines, comprising self adhesive strips positioned inside after being folded into package accommodating book

摘要

The sheet comprises a central area (1) between folding lines (14, 20) confining two lateral strips (18) and two lateral areas (22, 24) provided with self adhesive strips (32) protected by a thin paper layer before use. When folded around a book to be posted, the adhesive strips (32) are positioned inside the package, protecting the book from being easily removed by an unauthorized person.