| 摘要 |
A method of realizing an index in one edge of a book comprises the steps that a number of sheets which are to be allocated an index tab are counted off and provided with recesses for forming the index tabs, and that this is repeated until the intended number of index tabs has been formed. At least certain of the sheets are provided with a machine-readable code and the sheets are flipped through, whereupon the flip operation is arrested when the code indicates that the correct sheet has been located. An apparatus for realizing an index in one edge of a book comprises a holder device (4) for the sheets (1) of the book, a punch (11) for punching recesses in the edge of the sheets (1) for forming index tabs, counter means (14, 15) for counting, in the book, such numbers of sheets as are to be allocated each index tab and provided with corresponding recesses. The counter means include a machine-readable code on the sheet (1) and a reader herefor, a flip wheel (14) and a sheet holder (15) and a control unit which arrests the flip operation when the reader has located the correct sheet. |
