Sheet handling apparatus and image reading apparatus
US7425001B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2004 |
| Grant date | Sep 16, 2008 |
| Priority date | — |
| Expiry date | Sep 27, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2553/30
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A sheet handling apparatus includes a sheet stacker for stacking sheets; a separating device for separating and feeding the sheets stacked on the sheet stacker; and a register roller disposed adjacent to the separating device for correcting a skew of the sheet. An ultrasonic wave sensor composed of a wave sending sensor and a wave receiving sensor is arranged between the separating device and the register roller obliquely relative to a surface of the sheet. A judging device is electrically connected to the ultrasonic wave sensor for detecting a double feed of the sheets based upon an output signal from the wave receiving sensor at a predetermined time after the register roller starts rotating. A control device electrically connected to the judging device and the register roller controls the register roller to stop and rotate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.