Tape burnish with monitoring device
US6290573A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 23, 1999 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Aug 23, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/8404
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A monitoring device is used to monitor the performance of a burnishing apparatus that uses a burnishing tape. The monitoring device monitors the contact between the burnishing tape and the disk. The monitoring device may include an acoustic emission sensor, e.g., a piezo-electric transducer, that is mounted on the elements that press the burnishing tape into contact with the disk. Elastic waves that are produced by the contact between the burnishing tape and the disk propagate through the pressure applying element, received by the sensor and are converted into electric signals. The electric signals from the sensor are converted into amplitude signals in the time domain and/or signals in the frequency domain. Alternatively, the monitoring device may measure the elastic waves propagating through the disk, the tension on the burnishing tape, and/or the frictional force between the burnishing tape and the disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.