Method and apparatus for detecting the presence of magnetic ink within a package by magnetizing and selectively remagnitizing the ferro-magnetic materials in the package
US4734643A · kind A · utility
40Cited by
15References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1985 |
| Grant date | Mar 29, 1988 |
| Priority date | — |
| Expiry date | Aug 5, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V15/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for detecting the presence of magnetic ink within a package without opening the package or altering its contents. The method and apparatus detects items marked with magnetic ink, such as bank checks, in an unopened package independently of the item's location within the package and despite the presence of such magnetic clutter as staples and paper clips. The apparatus and method is designed to eliminate magnetic noise from the equipment itself and from the environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.