Magnetic recording member abrasion tester
US4091654A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 1977 |
| Grant date | May 30, 1978 |
| Priority date | — |
| Expiry date | Apr 18, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N3/56
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device and method are disclosed for testing the abrasion quality of a magnetic recording member to cause recording head wear. A magnetic recording member to be tested is moved past a dummy recording head, the smoothness of which has been determined before the head is contacted with the magnetic recording surface. After a predetermined contact between the dummy head and the tape, the smoothness of the head is again determined which is a direct function of the abrasion characteristics of the tape. The smoothness of the dummy head is determined by means of a non-contact photonic sensor which converts reflective light from the surface of the head into a specific voltage output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.