Method and apparatus for detection of multiple documents in a document scanner using multiple ultrasonic sensors
US7025348B2 · kind B2 · utility
13Cited by
11References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2002 |
| Grant date | Apr 11, 2006 |
| Priority date | — |
| Expiry date | Nov 4, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/106
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus (10) for detection of multiple documents (42) in a document transport system comprises a first transmitter (13) emitting a first signal at a first interval through a document feed path (40). A first sensor (14) detects the first signal from the first transmitter (13). A second transmitter (15) emits a second signal at a second interval through the document feed path (40). A second sensor (16) detects the second signal from the second transmitter (15).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.