GB1171429A - A Method of Duplicating a Magnetic Tape - Google Patents

A Method of Duplicating a Magnetic Tape

Info

Publication number
GB1171429A
GB1171429A GB3495468A GB3495468A GB1171429A GB 1171429 A GB1171429 A GB 1171429A GB 3495468 A GB3495468 A GB 3495468A GB 3495468 A GB3495468 A GB 3495468A GB 1171429 A GB1171429 A GB 1171429A
Authority
GB
United Kingdom
Prior art keywords
tape
master
copying
tapes
magnetic
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
GB3495468A
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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
Priority claimed from JP8466067U external-priority patent/JPS4526765Y1/ja
Priority claimed from JP8826667U external-priority patent/JPS4611098Y1/ja
Priority claimed from JP226568U external-priority patent/JPS4530371Y1/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of GB1171429A publication Critical patent/GB1171429A/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
    • G11B5/86—Re-recording, i.e. transcribing information from one magnetisable record carrier on to one or more similar or dissimilar record carriers
    • G11B5/865—Re-recording, i.e. transcribing information from one magnetisable record carrier on to one or more similar or dissimilar record carriers by contact "printing"
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00095—Systems or arrangements for the transmission of the picture signal
    • H04N1/00098—Systems or arrangements for the transmission of the picture signal via a television channel, e.g. for a series of still pictures with or without sound
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/084—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the horizontal blanking interval only

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Magnetic Record Carriers (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Abstract

1,171,429. Copying magnetic record tapes. MATSUCHITA ELECTRIC INDUSTRIAL CO. Ltd. 22 July, 1968 [2 Aug., 1967; 10 Aug., 1967; 28 Dec., 1967 (2); 4 Oct., 1967; 14 Oct., 1967; 28 Dec., 1967; 12 Jan., 1968; 30 Jan., 1968], No. 34954/68. Heading G5R. A blank copying tape 17 and a master record tape 16 of higher coercivity are wound together on to a take-up reel 24 with their magnetic coatings in contact with each other and are then subjected to a diminishing alternating magnetic field of strength intermediate between the coercive forces of the two tapes. This transfer field may be produced by passing alternating current through electromagnet windings or by rotating the tape reel past a plurality of permanent magnets of alternate polarities. To reduce print-through, a spacer tape, possibly carrying a magnetic shielding layer, may be wound with the master and copy tapes, or the master tape may carry a shielding layer on the side opposite to the recording layer. The copying and rewinding process may be controlled automatically by means of electrical or optical indicators near the ends of the master tape.
GB3495468A 1967-08-02 1968-07-22 A Method of Duplicating a Magnetic Tape Expired GB1171429A (en)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
JP5005867 1967-08-02
JP5167267 1967-08-10
JP8466067U JPS4526765Y1 (en) 1967-10-04 1967-10-04
JP8826667U JPS4611098Y1 (en) 1967-10-14 1967-10-14
JP1268 1967-12-28
JP7568 1967-12-28
JP786867 1967-12-28
JP226568U JPS4530371Y1 (en) 1968-01-12 1968-01-12
JP644968 1968-01-30

Publications (1)

Publication Number Publication Date
GB1171429A true GB1171429A (en) 1969-11-19

Family

ID=42983519

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3495468A Expired GB1171429A (en) 1967-08-02 1968-07-22 A Method of Duplicating a Magnetic Tape

Country Status (4)

Country Link
DE (1) DE1774608C3 (en)
FR (1) FR1603433A (en)
GB (1) GB1171429A (en)
NL (1) NL149623B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5042746Y1 (en) * 1970-05-25 1975-12-06
JPS5042747Y1 (en) * 1970-06-18 1975-12-06
JPS517076Y1 (en) * 1970-07-20 1976-02-26
JPS517873Y1 (en) * 1970-11-12 1976-03-02
JPS5111922B1 (en) * 1970-04-20 1976-04-15
JPS5116735Y1 (en) * 1970-08-18 1976-05-07
JPS5129007Y1 (en) * 1970-08-10 1976-07-22

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3893167A (en) * 1970-04-01 1975-07-01 Ampex Magnetic tape duplicator

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5111922B1 (en) * 1970-04-20 1976-04-15
JPS5042746Y1 (en) * 1970-05-25 1975-12-06
JPS5042747Y1 (en) * 1970-06-18 1975-12-06
JPS517076Y1 (en) * 1970-07-20 1976-02-26
JPS5129007Y1 (en) * 1970-08-10 1976-07-22
JPS5116735Y1 (en) * 1970-08-18 1976-05-07
JPS517873Y1 (en) * 1970-11-12 1976-03-02

Also Published As

Publication number Publication date
NL6810928A (en) 1969-02-04
FR1603433A (en) 1971-04-19
DE1774608B2 (en) 1972-09-21
DE1774608C3 (en) 1975-01-23
DE1774608A1 (en) 1972-01-27
NL149623B (en) 1976-05-17

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PE20 Patent expired after termination of 20 years