Magnetic thread reader
US7063257B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2002 |
| Grant date | Jun 20, 2006 |
| Priority date | — |
| Expiry date | Oct 14, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07D7/04
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method of detecting a magnetic thread comprises causing relative movement between the thread and an array of magnetic heads, each head generates a signal upon detecting a portion of the thread. The arrival of a thread at one of the heads is detected, that head being denoted a primary head, and the head on each side a secondary head. Output signals from the primary and secondary heads are monitored to generate a representation of the thread, and the magnitude of the signals from the primary and secondary heads are compared such that if the magnitude of the output signal from a secondary head exceeds that from the primary head, the primary and secondary heads are reallocated accordingly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.