US3679842A - Method and apparatus for preparing copies or duplicates of wide band record carriers on which signals are recorded - Google Patents

Method and apparatus for preparing copies or duplicates of wide band record carriers on which signals are recorded Download PDF

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Publication number
US3679842A
US3679842A US875101A US3679842DA US3679842A US 3679842 A US3679842 A US 3679842A US 875101 A US875101 A US 875101A US 3679842D A US3679842D A US 3679842DA US 3679842 A US3679842 A US 3679842A
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United States
Prior art keywords
band
playback
transducer heads
heads
master
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Expired - Lifetime
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US875101A
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English (en)
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Jahangir M Ahy
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Individual
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Individual
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    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K1/00—Methods or arrangements for marking the record carrier in digital fashion
    • G06K1/14—Methods or arrangements for marking the record carrier in digital fashion by transferring data from a similar or dissimilar record carrier

Definitions

  • ABSTRACT This invention provides a method and apparatus for preparing duplicates of wide band record carriers on which signals of a continuous program are recorded in a hundred or more track sections arranged side-by-side across the width of the band and generally parallel to the length of the band, the track sections being separate and parallel to the length of the band or being made continuous either by arranging them in a helical path inclined slightly to the length of the band or by arranging them parallel to the length of the band and interconnecting them by inclined sections so that continuous reproduction is possible.
  • Such recordings have a playing time of several hours.
  • the method and apparatus herein described employ multiple playback heads past which the master wide band record, which may be in the form of an endless loop provided with a length of blank band between the ends of the track sections, is fed, and multiple recording heads respectively energized by the corresponding one of the playback heads and past which a copy band is fed, whereby the track sections may be duplicated simultaneously.
  • the heads may be staggered along the paths of the respective bands and may, where the track sections are made continuous, follow tracking paths so that the duplicates have the track sections recorded thereon as a continuous program corresponding to the recording on the master wide band record being copied.
  • the present invention relates to a method of and apparatus for preparing copies or duplicates of wide band record carries on which signals are recorded magnetically, mechanically, optically or in any other way in a plurality of spaced parallel track sections extending generally in the longitudinal direction of the band.
  • the wide band record may be in the form of an endless loop on which the signals are recorded in track sections constituting a continuous track arranged in a helical path inclined slightly to the length of the band.
  • the track sections may be arranged side-by-side parallel to the length of the band, in which case they may be interconnected by inclined sections at one zone of the band so that continuous reproduction is possible. With such records the transducer head is advanced across the band as the record is played back.
  • the band is not endless, the parallel track sections being successively reproduced when the end of one track is reached by reversing the direction of motion of the band when the end of the track section is reached, the transducer head being shifted across the band to playback from the next track section.
  • Such wide band recordings have a long playing time a 6 inch wide band can accommodate 110 or more magnetic track sections so that a band 100 feet long can carry 1,1000 feet of recording) and the invention has for an object to provide a method of and apparatus for preparing copies or duplicates of such master recordings easily and quickly.
  • the signals may be recorded on the copies or duplicates with the same mode of recording as the master recording, for example magnetically from a master magnetic recording, or with a different mode of recording from the master, for example a magnetically recorded duplicate from an optically or mechanically recorded master.
  • copies or duplicates of the master recorded band are prepared by repetitively feeding the master band, preferably with its ends joined together to form an endless loop which has a length of blank band between the ends of the track sections, past a playback device comprising a plurality of playback transducer heads disposed across the band and corresponding in number and position to the number and position of track sections on the master band, and copying the recorded signals on to a copy band which is fed past a recording device comprising a corresponding number of recording transducer heads disposed transversely across the copy band in relative positions corresponding to the relative positions of the playback transducer heads of the playback device, the plural signal outputs simultaneously produced from the individual playback transducer heads of the playback device being fed respectively to the corresponding recording transducer heads of the recording divice to simultaneously record the signals in corresponding track sections on the copy band.
  • the transducer heads of the playback device are staggered along the length of the master band, the transducer heads of the recording device being similarly staggered.
  • the copy band may be drawn from a supply source, such as a reel, and fed continuously through the copying machine as the master band, in the form of an endless loop, is repetitively circulated passed the playback transducer heads, whereby a plurality of copies are produced on successive portions of the copy band which is then severed into lengths each comprising a copy of the master record.
  • the severed lengths may then, if appropriate for the recording in question, have their ends joined together to form an endless loop.
  • the copy band may be cut to the correct length before it is passed through the machine for recording. In this case the copy band may have its ends joined together to form it into an endless loop before recording.
  • the master band B in the form of an endless loop and having signals recorded thereon in separate parallel track sections arranged side-by-side parallel to the length of the band, is mounted on suitable drive rollers and tensioning rollers 101.
  • the band is continuously driven by a motor (not shown) past a playback device constituted by playback head assemblies 102a, l02b and 1020, each comprising a plurality of transducer heads assembled side-by-side.
  • the assembly 102a carries a number of transducer heads positioned to pick up signals recorded in the first, fourth, seventh, etc. tracks on the band B.
  • the assembly l02b has a number of transducer heads to pick up signals recorded in tracks two, five, eight and so on and the assembly l02c has heads to pick up signals recorded in tracks three, six, nine and so on.
  • the transducer heads of the playback device are disposed across the path of the master band B in rows staggered along said path. 4
  • the copy band B1 is drawn from a bulk supply reel 103 and is fed continuously by driving and guide rollers 104 past recording head assemblies 105a, l05b and 105C comprising assemblies of transducer heads similar to the playback assemblies 102a, l02b and 1020 respectively.
  • the signal outputs from the plural heads of the playback device 102 are individually amplified in a series of amplifiers indicated at 106 and fed respectively to the corresponding transducer heads of the recording device 105.
  • the copy band, after recording, is cut into record lengths by the cutting device 107.
  • a marking device 110 may mark the end and beginning of the recorded portions on the copies, for example by marking a stepped line along the edge of the copy band.
  • a blank portion 111 is provided in the master band.
  • blank spaces are provided on the duplicate copies corresponding to the blank portion of the endless loop and separating the copies is facilitated.
  • the blank portion 111 may be of any length; for example it may be long enough to form blank lengths constituting leaders at each end of the recorded copies.
  • the blank portion 1 X1 in the master recorded band must be long enough to accommodate the staggered heads of the assemblies 102a, 102k and 1020 and also (unless the transducer heads are switched off when the copy has been made) to allow for the time taken for the apparatus to stop after the copy has been made.
  • the blank portion 111 may be shorter.
  • the playback transducer heads of the assembly 102a will be switched off first, followed by the heads of the assembly l02b and then those of the assembly 102e, the time elapsing between the heads of the different rows being switched off depending upon the speed at which the master band B is being driven.
  • cam mechanisms 108, 109 are associated with the playback device 102, and recording device [05 respectively for causing the assemblies to be displaced transversely of the bands B and B1 through a distance of one track pitch while the band B makes one complete revolution, whereupon the head assemblies restore to their original track positions.
  • the endless loop of the master recorded band is opened and the length of blank band 111 is joined between its ends.
  • the endless master loop thus formed is introduced into the playback unit and adjusted in such a way that the start of a recorded track section, which is previously marked (for example by the joint), is located exactly in register with the first head of the pick-up assembly 102a. All the other tracks will, during copying, register with the other heads.
  • each of the playback and recording head assemblies After one complete revolution of the master band, during which each of the playback and recording head assemblies makes the one track pitch transverse movement across its associated band, so that the signals on all the helicoidal tracks are picked-up from the master band and similarly recorded on the copy" band, the head assemblies suddenly return to their initial position, which movement takes place over the blank portion 111 of the loop. The cycle is then repeated to print another copy. Since the restoration of the playback heads is accomplished whilst the heads are opposite the blank portion 111 of the master band, this blank portion 111 must be at least long enough to accommodate the staggered heads and to enable the restoration to be accomplished. If the playback and recording transducer heads are not staggered, then the length of blank band may be short, for example one-half inch wide.
  • the duplication of the master record can be effected at any appropriate speed which enables the duplicate records to have the required response and fidelity characteristics.
  • the record can be copied at say five times normal track speed without detriment to the quality of the signals reproduced from the duplicate. All the track sections are, of course, copied simultaneously.
  • the transducer heads of the playback and recording head assemblies may be of the magnetic, mechanical or optical types to playback from or record magnetic, mechanical or optical recordings, and recording heads may be of a different type from the playback heads.
  • the signals recorded on the bands which can be copied as above described need not be sound signals. They can also be signals for automation control, data processing, or for any other purpose.
  • Apparatus for preparing copies of wide band record carriers on which signals are recorded in a plurality of track sections arranged side-by-side across the width of the band and generally parallel to the length of the band, said sections constituting parts of a continuous long playing track comprising: a playback device comprising a plurality of playback transducer heads disposed in a plurality of rows, with a plurality of transducer heads arranged side-by-side in each row, heads for scanning adjacent said track sections being in different rows, means for repetitively advancing a master band, in the form of an endless loop, across said playback device in a direction transverse to said rows of said playback transducer heads; a recording device comprising a plurality of recording transducer heads equal in number to the number of playback transducer heads and disposed in a plurality of rows in the same manner as the playback transducer heads; a source of copy band, means for drawing a copy band from said source and advancing it across said recording device in a direction transverse to said rows

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
US875101A 1967-06-05 1969-11-10 Method and apparatus for preparing copies or duplicates of wide band record carriers on which signals are recorded Expired - Lifetime US3679842A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL6707797A NL6707797A (de) 1967-06-05 1967-06-05
DEA0055902 1967-06-07
US87510169A 1969-11-10 1969-11-10

Publications (1)

Publication Number Publication Date
US3679842A true US3679842A (en) 1972-07-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
US875101A Expired - Lifetime US3679842A (en) 1967-06-05 1969-11-10 Method and apparatus for preparing copies or duplicates of wide band record carriers on which signals are recorded

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US (1) US3679842A (de)
DE (1) DE1524723A1 (de)
NL (1) NL6707797A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4652941A (en) * 1985-03-08 1987-03-24 Bell & Howell/Columbia Method and system for real time video tape duplicating
EP0259142A2 (de) * 1986-09-03 1988-03-09 Sony Magnescale, Inc. Herstellung von vorher aufgezeichneten Kassetten
US5940805A (en) * 1994-12-22 1999-08-17 Alcatel N.V. Method of selling data records as well as vending apparatus, memory device, chip card, and system for selling telecommunications software

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2686057A (en) * 1947-07-30 1954-08-10 William L Woolf Recorder for simultaneous multiple recording upon films, tapes, or wires
US2976372A (en) * 1959-03-02 1961-03-21 Sidney O Sampson Magnetic tape reproducing system
US3170044A (en) * 1958-10-15 1965-02-16 Groak Josef Manufacture of magnetic records

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2686057A (en) * 1947-07-30 1954-08-10 William L Woolf Recorder for simultaneous multiple recording upon films, tapes, or wires
US3170044A (en) * 1958-10-15 1965-02-16 Groak Josef Manufacture of magnetic records
US2976372A (en) * 1959-03-02 1961-03-21 Sidney O Sampson Magnetic tape reproducing system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4652941A (en) * 1985-03-08 1987-03-24 Bell & Howell/Columbia Method and system for real time video tape duplicating
EP0259142A2 (de) * 1986-09-03 1988-03-09 Sony Magnescale, Inc. Herstellung von vorher aufgezeichneten Kassetten
WO1988001783A2 (en) * 1986-09-03 1988-03-10 Tape Automation Ltd. Production of pre-recorded cassettes
WO1988001783A3 (en) * 1986-09-03 1988-05-05 Tape Automation Ltd Production of pre-recorded cassettes
EP0259142A3 (en) * 1986-09-03 1988-07-06 Tape Automation Ltd Production of pre-recorded cassettes
US4987503A (en) * 1986-09-03 1991-01-22 Gardner John P Method to produce pre-recorded tape cassettes
US5940805A (en) * 1994-12-22 1999-08-17 Alcatel N.V. Method of selling data records as well as vending apparatus, memory device, chip card, and system for selling telecommunications software

Also Published As

Publication number Publication date
DE1524723A1 (de) 1971-01-28
NL6707797A (de) 1968-12-06

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