Method of changing a thermomagnetic tape duplicator to an anhysteretic type of tape duplicator
US5923484A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1996 |
| Grant date | Jul 13, 1999 |
| Priority date | — |
| Expiry date | Aug 30, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/502
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved high speed magnetic tape duplicator incorporates superior features from both thermomagnetic and anhysteretic processes to increase productivity in operating economics. Starting with a basic transport configuration of existing thermomagnetic equipment, the heating and cooling facilities are removed along with the non-magnetic transfer drum, and replaced with a magnetizable drum assembly and bias-field head suitable to anhysteretic duplication. Provisions are also added to correct tension errors so as to minimize skew and the transport control electronics are preferably replaced with a personal computer-based controller capable of furnishing additional functional capabilities including production reporting. Optionally, the master-tape loop-bin chamber is also specially modified with electrically ground static-control provisions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.