Detector with triangle-shaped inductor coils
US11078038B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 2016 |
| Grant date | Aug 3, 2021 |
| Priority date | — |
| Expiry date | Jun 11, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00624
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A document feeder may include a media transporter to feed a number of sheets of media through a feed path and a detector to detect the presence of a metal object including a number of triangular-shaped inductor coils to detect the metal objects. A method of detecting a metal object coupled to a sheet of media entering a document processing device may include applying an alternating current to a number of triangular-shaped inductor coils to create a magnetic field upstream of a media feed path, detecting a change in a magnetic flux of the magnetic field due to a metal object in the path of said magnetic flux, and producing a warning when the changes in the magnetic flux are detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.