FR2353108B3 - - Google Patents
Info
- Publication number
- FR2353108B3 FR2353108B3 FR7716353A FR7716353A FR2353108B3 FR 2353108 B3 FR2353108 B3 FR 2353108B3 FR 7716353 A FR7716353 A FR 7716353A FR 7716353 A FR7716353 A FR 7716353A FR 2353108 B3 FR2353108 B3 FR 2353108B3
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
- G11B5/024—Erasing
- G11B5/0245—Bulk erasing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
- H01F13/006—Methods and devices for demagnetising of magnetic bodies, e.g. workpieces, sheet material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Magnetic Heads (AREA)
- Electromagnets (AREA)
- Load-Engaging Elements For Cranes (AREA)
- General Induction Heating (AREA)
- Magnetic Treatment Devices (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB22374/76A GB1522548A (en) | 1976-05-28 | 1976-05-28 | Bulk tape eraser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2353108A1 FR2353108A1 (fr) | 1977-12-23 |
| FR2353108B3 true FR2353108B3 (enExample) | 1981-03-20 |
Family
ID=10178347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7716353A Granted FR2353108A1 (fr) | 1976-05-28 | 1977-05-27 | Dispositif d'effacement de bobines entieres de bande magnetique |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4136373A (enExample) |
| AU (1) | AU505185B2 (enExample) |
| DE (2) | DE7715593U1 (enExample) |
| FR (1) | FR2353108A1 (enExample) |
| GB (1) | GB1522548A (enExample) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4462055A (en) * | 1982-01-04 | 1984-07-24 | Ldj Electronics, Inc. | Bulk tape erasing system |
| DE3736024C1 (en) * | 1987-10-24 | 1989-03-23 | Agfa Gevaert Ag | Demagnetising device |
| JP2793735B2 (ja) * | 1992-02-18 | 1998-09-03 | 富士通株式会社 | 磁気ディスク媒体の欠陥検出方法 |
| US5721665A (en) * | 1995-08-18 | 1998-02-24 | Data Security, Inc. | Modulated magnet field bulk degaussing system |
| US6731491B2 (en) | 2001-06-15 | 2004-05-04 | Data Security, Inc. | Bulk degausser with fixed arrays of magnet poles |
| US7164569B1 (en) | 2004-06-30 | 2007-01-16 | Data Security, Inc. | Mechanism for automated permanent magnet degaussing |
| US20060018075A1 (en) * | 2004-07-23 | 2006-01-26 | Data Security, Inc. | Permanent magnet bulk degausser |
| DE102005032940B3 (de) * | 2005-07-14 | 2006-10-12 | Aktenmühle GmbH | Entmagnetisierungsvorrichtung |
| US7701656B2 (en) * | 2006-07-14 | 2010-04-20 | Data Security, Inc. | Method and apparatus for permanent magnet erasure of magnetic storage media |
| US7715166B2 (en) * | 2006-07-14 | 2010-05-11 | Data Security, Inc. | Method and reciprocating apparatus for permanent magnet erasure of magnetic storage media |
| US20090284890A1 (en) * | 2008-05-16 | 2009-11-19 | Thiel Leroy D | Mechanism and Method for Permanent Magnet Degaussing |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2702835A (en) * | 1945-08-25 | 1955-02-22 | Armour Res Found | Erase head for magnetic recorder |
| GB1020522A (en) * | 1963-10-15 | 1966-02-16 | Amos Of Exeter Ltd | Bulk-tape eraser |
| US3660727A (en) * | 1968-10-16 | 1972-05-02 | Sony Corp | Bulk eraser with permanent magnet flux produced obliquely to cassette movement |
-
1976
- 1976-05-28 GB GB22374/76A patent/GB1522548A/en not_active Expired
-
1977
- 1977-05-09 US US05/794,891 patent/US4136373A/en not_active Expired - Lifetime
- 1977-05-17 DE DE19777715593U patent/DE7715593U1/de not_active Expired
- 1977-05-17 DE DE19772722167 patent/DE2722167A1/de not_active Ceased
- 1977-05-25 AU AU25497/77A patent/AU505185B2/en not_active Expired
- 1977-05-27 FR FR7716353A patent/FR2353108A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| AU505185B2 (en) | 1979-11-08 |
| DE2722167A1 (de) | 1977-12-08 |
| US4136373A (en) | 1979-01-23 |
| DE7715593U1 (de) | 1982-07-15 |
| FR2353108A1 (fr) | 1977-12-23 |
| GB1522548A (en) | 1978-08-23 |
| AU2549777A (en) | 1978-11-30 |