| 摘要 |
PURPOSE:To detect a double feeding such as a perfect superposing of sheets and a superposing of sheets with a large slippage in the longitudinal direction by detecting both the thickness of the front end and the thickness of the rear end of a sheet body of a book sheet and the like. CONSTITUTION:After starting the feeding of a sheet body 3, the thickness at a specific position of the front end and the thickness at a specific position of the rear end of a sheet body 3 are detected by a sensor 12. And when one side thickness of the detecting values exceeds the thickness of one sheet of the sheet body 3, it is detected as a double feeding. |
