Signature blotting-book or sorting file with an insertable indexing system

摘要

The outer cover (1) has a series of windows (6) down its edge and a flap (7) that is folded under and stuck down to form a pouch to receive a removable slip of paper marked with indicators to be seen through the windows. The indicators are matched with indexing tabs (5) on the edges of separators (4) inside the folder.