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FR2390800A1 - MAGNETIC TAPE EQUIPPED WITH OPTICALLY OBSERVABLE MARKS AND PROCESS FOR THE MANUFACTURE OF SUCH TAPE - Google Patents

MAGNETIC TAPE EQUIPPED WITH OPTICALLY OBSERVABLE MARKS AND PROCESS FOR THE MANUFACTURE OF SUCH TAPE

Info

Publication number
FR2390800A1
FR2390800A1 FR7813850A FR7813850A FR2390800A1 FR 2390800 A1 FR2390800 A1 FR 2390800A1 FR 7813850 A FR7813850 A FR 7813850A FR 7813850 A FR7813850 A FR 7813850A FR 2390800 A1 FR2390800 A1 FR 2390800A1
Authority
FR
France
Prior art keywords
tape
manufacture
magnetic tape
optically observable
marks
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.)
Withdrawn
Application number
FR7813850A
Other languages
French (fr)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2390800A1 publication Critical patent/FR2390800A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/38—Visual features other than those contained in record tracks or represented by sprocket holes the visual signals being auxiliary signals
    • G11B23/42—Marks for indexing, speed-controlling, synchronising, or timing

Landscapes

  • Magnetic Record Carriers (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Paints Or Removers (AREA)

Abstract

Bande magnétique munie de repères qui peuvent être observés par voie optique du côté de la face dorsale du support (transparent). Les repères affectent la forme de zones laiteuses qui, à la face limite entre la couche magnétique et le support, se sont formées sous l'influence du rayonnement émis par un laser. Application aux appareils d'enregistrement et/ou de reproduction d'informations vidéo.Magnetic tape provided with markers which can be observed optically from the back side of the support (transparent). The marks affect the shape of milky areas which, at the boundary face between the magnetic layer and the support, are formed under the influence of the radiation emitted by a laser. Application to apparatus for recording and / or reproducing video information.

FR7813850A 1977-05-10 1978-05-10 MAGNETIC TAPE EQUIPPED WITH OPTICALLY OBSERVABLE MARKS AND PROCESS FOR THE MANUFACTURE OF SUCH TAPE Withdrawn FR2390800A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7705111A NL7705111A (en) 1977-05-10 1977-05-10 MAGNETIC TAPE WITH OPTICALLY SIGNABLE MARKS AND METHOD OF MANUFACTURE OF SUCH TAPE.

Publications (1)

Publication Number Publication Date
FR2390800A1 true FR2390800A1 (en) 1978-12-08

Family

ID=19828522

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7813850A Withdrawn FR2390800A1 (en) 1977-05-10 1978-05-10 MAGNETIC TAPE EQUIPPED WITH OPTICALLY OBSERVABLE MARKS AND PROCESS FOR THE MANUFACTURE OF SUCH TAPE

Country Status (5)

Country Link
JP (1) JPS53139518A (en)
DE (1) DE2820140A1 (en)
FR (1) FR2390800A1 (en)
GB (1) GB1595136A (en)
NL (1) NL7705111A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986005915A1 (en) * 1985-03-27 1986-10-09 Bruno Kessler Data carrier tape with transfer strip; also a process and a device for its manufacture
EP0417158A1 (en) * 1988-06-02 1991-03-20 Newell Research Corporation Method for writing and means for reading position-indicating markers on tape

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT378620B (en) * 1983-08-11 1985-09-10 Heinz Seidl MAGNETOGRAM CARRIER WHOSE ORIGIN IS NON-REMARKABLY MARKED
US20030054203A1 (en) 1997-10-22 2003-03-20 Quantum Corporation, A California Corporation Magnetic tape
US6084740A (en) 1997-12-01 2000-07-04 Storage Technology Corporation Optical servo system for a tape drive
GB2335785B (en) 1998-03-24 2002-09-18 Quantum Corp Multi-channel magnetic tape system having optical tracking servo
AU2441099A (en) 1999-02-16 2000-09-04 Quantum Corporation Method of writing servo signal on magnetic tape
AU2547199A (en) 1999-02-17 2000-09-04 Quantum Corporation Method of writing servo signal on magnetic tape
US6558774B1 (en) 1999-08-17 2003-05-06 Quantum Corporation Multiple-layer backcoating for magnetic tape

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB635133A (en) * 1947-01-31 1950-04-05 Otto Kurt Kolb Improved magnetic sound record carrier
US3175196A (en) * 1962-03-09 1965-03-23 Lab For Electronics Inc Thermoplastic information storage system
FR2010811A1 (en) * 1968-06-13 1970-02-20 Cidice
FR2083918A5 (en) * 1970-03-09 1971-12-17 Energy Conversion Devices Inc
FR2095860A5 (en) * 1970-06-08 1972-02-11 Energy Conversion Devices Inc
NL7112916A (en) * 1971-09-20 1973-03-22
FR2155373A5 (en) * 1971-09-30 1973-05-18 Siemens Ag
FR2250318A5 (en) * 1971-09-30 1975-05-30 Ncr Co
US3914793A (en) * 1974-04-30 1975-10-21 William W Burnham Tape recorder alignment apparatus
FR2315142A1 (en) * 1975-06-17 1977-01-14 Pyral Soc Transducer head guide system - using additional guide track associated with magnetic recording track
FR2347744A1 (en) * 1976-04-10 1977-11-04 Philips Nv CARRIER OF INFORMATION EQUIPPED WITH A MAGNETIC STORAGE LAYER AND DEVICE FOR READING OR WRITING OF SUCH CARRIER

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB635133A (en) * 1947-01-31 1950-04-05 Otto Kurt Kolb Improved magnetic sound record carrier
US3175196A (en) * 1962-03-09 1965-03-23 Lab For Electronics Inc Thermoplastic information storage system
FR2010811A1 (en) * 1968-06-13 1970-02-20 Cidice
FR2083918A5 (en) * 1970-03-09 1971-12-17 Energy Conversion Devices Inc
FR2095860A5 (en) * 1970-06-08 1972-02-11 Energy Conversion Devices Inc
NL7112916A (en) * 1971-09-20 1973-03-22
FR2155373A5 (en) * 1971-09-30 1973-05-18 Siemens Ag
FR2250318A5 (en) * 1971-09-30 1975-05-30 Ncr Co
US3914793A (en) * 1974-04-30 1975-10-21 William W Burnham Tape recorder alignment apparatus
FR2315142A1 (en) * 1975-06-17 1977-01-14 Pyral Soc Transducer head guide system - using additional guide track associated with magnetic recording track
FR2347744A1 (en) * 1976-04-10 1977-11-04 Philips Nv CARRIER OF INFORMATION EQUIPPED WITH A MAGNETIC STORAGE LAYER AND DEVICE FOR READING OR WRITING OF SUCH CARRIER

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/69 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986005915A1 (en) * 1985-03-27 1986-10-09 Bruno Kessler Data carrier tape with transfer strip; also a process and a device for its manufacture
EP0417158A1 (en) * 1988-06-02 1991-03-20 Newell Research Corporation Method for writing and means for reading position-indicating markers on tape
EP0417158A4 (en) * 1988-06-02 1992-03-04 Newell Research Corporation Method for writing and means for reading position-indicating markers on tape

Also Published As

Publication number Publication date
JPS53139518A (en) 1978-12-05
GB1595136A (en) 1981-08-05
NL7705111A (en) 1978-11-14
DE2820140A1 (en) 1978-11-16

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Legal Events

Date Code Title Description
ST Notification of lapse