| 摘要 |
A leaf-turning device and an index-cutting machine, equipped with such a device, for thumb-indexing a thumb-index side of a document retained by a gripping device (2) on a holder (10), are disclosed. The leaf-turning device comprises an abutment (3) about which the document sheets are to be bent, and a leaf-turning reed (4) movable in relation to the abutment in order to retain the bent sheets against the abutment until they are to be released and indexed. The invention is distinguished by the abutment being movable in relation to the gripping device (2) in order to achieve successive release of the sheets retained by the leaf-turning reed (4) when the abutment (3) is moved away from the gripping device (2), and by a photocell device (7) being arranged at a distance from the abutment (3) for detecting markings on the document sheets in order to control the movements of the abutment (3) in relation to the gripping device (2) as a function of such detection. |
