GB1522548A - Bulk tape eraser - Google Patents

Bulk tape eraser

Info

Publication number
GB1522548A
GB1522548A GB22374/76A GB2237476A GB1522548A GB 1522548 A GB1522548 A GB 1522548A GB 22374/76 A GB22374/76 A GB 22374/76A GB 2237476 A GB2237476 A GB 2237476A GB 1522548 A GB1522548 A GB 1522548A
Authority
GB
United Kingdom
Prior art keywords
limb
bulk
bulk tape
tape eraser
eraser
Prior art date
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
Application number
GB22374/76A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Amos of Exeter Ltd
Original Assignee
Amos of Exeter Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Amos of Exeter Ltd filed Critical Amos of Exeter Ltd
Priority to GB22374/76A priority Critical patent/GB1522548A/en
Priority to US05/794,891 priority patent/US4136373A/en
Priority to DE19777715593U priority patent/DE7715593U1/de
Priority to DE19772722167 priority patent/DE2722167A1/de
Priority to AU25497/77A priority patent/AU505185B2/en
Priority to FR7716353A priority patent/FR2353108A1/fr
Publication of GB1522548A publication Critical patent/GB1522548A/en
Expired legal-status Critical Current

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)
GB22374/76A 1976-05-28 1976-05-28 Bulk tape eraser Expired GB1522548A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB22374/76A GB1522548A (en) 1976-05-28 1976-05-28 Bulk tape eraser
US05/794,891 US4136373A (en) 1976-05-28 1977-05-09 Bulk tape eraser
DE19777715593U DE7715593U1 (de) 1976-05-28 1977-05-17 Bandloeschspule
DE19772722167 DE2722167A1 (de) 1976-05-28 1977-05-17 Bandloeschspule
AU25497/77A AU505185B2 (en) 1976-05-28 1977-05-25 Bulk tape eraser
FR7716353A FR2353108A1 (fr) 1976-05-28 1977-05-27 Dispositif d'effacement de bobines entieres de bande magnetique

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 (1)

Publication Number Publication Date
GB1522548A true GB1522548A (en) 1978-08-23

Family

ID=10178347

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22374/76A Expired GB1522548A (en) 1976-05-28 1976-05-28 Bulk tape eraser

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

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
AU2549777A (en) 1978-11-30
FR2353108B3 (enExample) 1981-03-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930503