Image reading apparatus
US7172195B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 2004 |
| Grant date | Feb 6, 2007 |
| Priority date | — |
| Expiry date | Dec 29, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2553/30
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A sheet feeding apparatus includes a stacker for stacking a sheet; a sheet separating device for sequentially separating and feeding the sheet stacked on the stacker; a sheet transport guide for guiding the sheet from the separating device to a processing position; and an ultrasonic wave sensor arranged between the separating device and the processing position for detecting the sheet. The ultrasonic wave sensor has a wave sending element for emitting an ultrasonic wave with a predetermined frequency and a wave receiving element for receiving the ultrasonic waves from the wave sending element. The wave sending element is arranged at a lower position in a direction of gravity relative to the sheet transport guide. The wave receiving element is arranged at an upper position opposite to the lower position, and has a wave sending surface inclined with an angle relative to a horizontal direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.