US3852525A - Magnetic facsimile and read-out device for original - Google Patents

Magnetic facsimile and read-out device for original Download PDF

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Publication number
US3852525A
US3852525A US00308944A US30894472A US3852525A US 3852525 A US3852525 A US 3852525A US 00308944 A US00308944 A US 00308944A US 30894472 A US30894472 A US 30894472A US 3852525 A US3852525 A US 3852525A
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magnetic
endless
sheet
signals
transfer
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US00308944A
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English (en)
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H Ono
S Takeuchi
K Onishi
T Inoue
S Ichioka
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G19/00—Processes using magnetic patterns; Apparatus therefor, i.e. magnetography

Definitions

  • ABSTRACT A magnetic fax system is disclosed.
  • the system is adapted to receive information from a record medium and from a remote station, as well as to transmit information.
  • a magnetizing bar is used for magnetizing signals on the record medium.
  • An endless travelling transfer magnetic sheet is provided for receiving the first magnetic signals from the record medium after they have been magnetized.
  • a pair of coacting rollers press the endless transfer magnetic sheet to the record medium and an AC field is simultaneously supplied for transferring the magnetic signals to the endless magnetic sheet.
  • a scanning device is provided downstream along the path of the endless magnetic sheet from the magnetizing region and by means of this device magnetic signals transmitted from a remote location may be transferred to the endless magnetic sheet and signals may be transmitted from the endless magnetic sheet to a remote location.
  • the scanning device includes a recording head and a magnetic reading head which are positioned adjacent the endless sheet.
  • An induction coil is coupled to the magnetic reading head and the recording head for transferring signals from the endless magnetic sheet and for transferring signals to the magnetic sheet.
  • the endless sheet passes between a second set of coacting rollers which are located downstream from the scanning device, one roller extending into a supply of magnetic powder which has a resin coating thereon and the powder is thereby transferred to the endless sheet.
  • the endless sheet next passes to a printing region which includes a third set of coacting rollers through which the endless sheet and a recording paper are simultaneously passed, the resin being ,thus transferred to the recording paper.
  • a heating plate is positioned for melting the resin coating of the magnetic powder which has been transferred onto the recording paper.
  • a demagnetizing system such as a permanent magnet, is positioned along the path of the endless sheet for erasing the magnetic image.
  • the present invention relates to a magnetic fax, i.e.,
  • a magnetic facsimile which electromagnetically converts data stored on a magnetic recording medium into signals, so that the construction of the device is compli-- cated.
  • the present invention has for its object to provide a new type of magnetic fax which is easily operated and has a simple construction.
  • the present invention has for its further object to provide a magnetic fax in which, during transmitting and receivingas .well as when preserving information onthe magnetic recording medium, the contents of the information can keep secret and in which preservation and multiprinting of the magnetic latent image at the time of transmitting or receiving the. signals is possible, and the characteristics'of'the-magnetic transfer system without adark room can fully be utilized.
  • a magnetic fax comprising means for receiving a record medium where magnetic signals such as magnetic characters are recorded, a magnetizing means for magnetizing the signal recorded on the record medium, an endless transfer mag netic sheet for the magnetic signal magnetized by the magnetizing means, a pressing means for pressing the magnetic signal after it has been transferred to the transfer magnetic sheet, a supplying means an AC transfer magnetic field fortransferring the magnetic signal tothe transfer magnetic sheet by pressingthe magnetic .signal to the transfer magnetic sheet by means of the pressing means,-one or more magnetic heads for reading out a'magnetic latent image transferred to said transfer magnetic sheet, a transmission and reception scanning means provided withone or more recording heads for recording the magnetic signal on the transfer magnetic sheet according to the receiving signal from .outside, an induction coil means for performing transmission and reception of the signal between a transmitting section for transmitting the signal read out by the magnetic head of said scanning means and a receiving section for receiving the signal transmitted from the outside and the recording head for recording the magnetic signal according to the received signal to the transfer magnetic sheet
  • a read-out device for use in the magnetic fax includes means for transferring magnetic signals, such as magnetic characters recorded on an original, to a magnetic sheet, means for adhering magnetic powder for developing a magneticlatent' image transferred to the magnetic sheet, and means for transferring a magnetic image developed by the magnetic powder on the magnetic sheet to a recording paper.
  • FIG. 1 is a perspective view showing an embodiment of a magnetic fax according to the present invention
  • FIG. 2 is a'plane view showing a scanning section in the embodiment of FIG. 1; v v
  • FIGS. 3a, 3b and 3e to 3j areconstructional views showing embodiments of the magnetic heads used in the scanning section;
  • FIG. 30 is an enlarged cross-sectional'view of a magnetic wire used in the magnetic head
  • FIG. 3d is an enlarged cross-sectional view of a magnetic member used in the magnetic head
  • FIG. 4a is asectional view taken along the line A -A in FIG.'2;
  • FIG. 5 is a constructional view of a recording head used in the scanning section.
  • the original 1 is inserted into a receiving section 2 in i the direction of an arrow A, and passes through a magnetizing section 3.
  • the original the passes between rollers 4 and 9 which define a pressing means for pressing the recording surface of the original 1 against a transfer surface of an endlesstransfer magnetic sheet 8 extending between rollers 4, 5 and 6.
  • the sheet 8 always travels in the direction shown by arrow :7 by means of the driving roller 4.
  • the original is thereafter removed through a chute 10 in the direction of arrow B.
  • the magnetizing section 3 for magnetizing the original 1 extends along the entire width of the original 1 in order to magnetize all the magnetic signals recorded generating mechanism, a pulse magnetic field, etc.
  • the magnetizing section 3 may have a single body having a length sufficient for positioning the member across the width of the original 1 or an assembly of a desired number of permanent magnets each having N and S magnetic fields, and having a desired shape. Further, the magnetizing section 3 can be also positioned on thelower side of the original 1 or both sides can be energized by means-of two sections 3. b
  • the endless transfer magnetic sheet 8 has a magnetic transfer surface of a magnetic material which has a coercive force value He that it is smaller than that of the original 1 and the magnetic latent image obtained on the transfer surface from the magnetic signals of the original 1 is not erased by an external magnetic field or the like. Moreover, the transfer magnetic sheet 8 is sufficiently wide to transfer all the magnetic signals recorded in the lateral direction of the original 1. As an example of this endless transfer magnetic sheet 8, mention may'be made of known magnetic tapes or Permalloy sheets, etc;
  • rollers 4 and 9 whichpress the original 1 and the transfer magnetic sheet 8 together are designed for surely and closely pressing both the sheets in order to improve transfer efficiency, but a slight elasticity is given to the surfaces of the rollers 4, 9 for preventing any excessive pressure.
  • the transfer is accomplished by means of an AC transfer magnetic field.
  • a means for-applying the AC transfer magnetic field comprises a coil 12 wired within the roller 4. An alternating current is supplied between both terminals 12a and 12b of the coil 12.
  • the reference numeral 13 indicates a transmission and reception scanning section for reading out the magnetic latent image which have been-transferred from the magnetic signals of theioriginal 1 to the transfer magnetic sheet 8 (placed in the transmitting side and for transmitting the readout signal to a transmit ting section 14.
  • the section also records signals received by a receiving section 15 on to the transfer magnetic sheet 8 (placed in the receiving side).
  • reference numeral 16 denotes a magnetic head for scanning signals to be transmitted.
  • the magnetic head 16 is positioned on a belt 19 extended between pulleys l7 and 18 for scanning the transfer magnetic sheet 8 which proceeds in the direction of the arrow 7.
  • the magnetic head 16 has the ability to effectively which acts as a frequency doubler of said alternating current.
  • the change of the'phaseof said doubled fre- "quency due to the polarity of .theexternal magnetic That is, in FIGS. 3a and 3b, l07a and 107bare yoke portions, flatly and opposedly arranged as illustrated, provided with a gap G at one end thereof, this portion being a headportion H, and being connected to the magnetic wire 103 or the magnetic member 104 to the other ends of the yoke portions.
  • the magnetic wire 103 is bonded to the other ends of the yoke portions 107a and 107b by a bonding agent 108 containing a magnetic powder, but in case of the magnetic member 104, it is possible to integrally form the magnetic member with the yoke portions.
  • the head portion I-I' approaches the magnetic signal M on the transfer sheet 8, a magnetic flux d2 of the sigwire 103 or the magnetic member 104 of the inductance element and then to the other yoke portion 10711.
  • the signal M completes thepath .of the flux d1.
  • the flux d) entersinto the head portion H and 1 again returns from the head portion H to thesignal M through members 107b 103 or 104 107a.
  • the phase of the double frequency oscillating voltage e2f is determined by thedirection of the flux d), and the magnetic signal M can be read out by discriminating it. If the magnetic signal M passes near the head portion H, both ends of themagnetic wire 103 (or the magnetic member 104 of the inductance element) simultaneously are affected.
  • the gap G can be made small by means of etching or the like, so that almost no leaking .flux is existent-Specifically by making the gap G narrower than the width of the magnetic signal M the signal may be detected with high sensitivity.
  • the-,r'nagnetic head may read out the magnetic signal withhigh resolution.
  • the magnetic head is also effective. s
  • the magnetic sensor shown in FIGS. 3e and 3]" show an embodiment of a differential type magnetic head which is constructed by arranging a magnetic wire 103' or a magnetic member 104 in parallel to the magnetic magnetic field as compared with the magnetic head shown in FIGS.. 3d and 3b.
  • FIGS. 3g and 3h show further embodiments wherein, as a part of the magnetic circuit having a slight gap, an orthogonal flux gate which utilizes a magnetic thin film with its rotating magnetization mechanism instead of the double-frequency oscillating circuit described in the above examples.
  • the gap is formed as a magnetic detecting head.
  • the phase of the doublefrequency component of the output voltage observed at the output terminals 105a and 10512 of the coil 105 is either 0 phase or 11' phase according to the polarity of the flux generated from the magnetic signal M.
  • discriminating means for example by discrimi-
  • the magnetic signal M can be read out, by observing the magnetizing direction and the strength thereof.
  • FIGS. 3i and 3j show differential magnetic heads consisting of an orthogonal flux gate achieved by arranging the magnetic wire 103' and the magnetic member 104'in parallel to the magnetic wire 103 or the magnetic member 104 and winding the coil 105 thereon as illustrated in the figures for removing any influence of the external magnetic field.
  • 110 shows an electrical insulating material.
  • the reference numerals to 23 indicate electrically conductive belts extending in parallel to the belt 19 between, respectively, pulleys 26 and 27, 28 and 29, 30 and 31, and 32 and 33. These pulleys are also firmly" connected to shafts 24 and 25.
  • the belts 20 and 21 are connected to the exciting terminals 109a and 10912 of the magnetichead l6 and the belts 22 and 23 are connected to the output terminals 105a and 105b ofthe magnetic head 16, respectively.
  • eachof the main bodies 27a; 29a, 30a and 32a of the pulleys 27,29,30 and 32 are made of anon-conductive m ateriahbut, on the contact surfaces of the pulleys electrical-conductive rings '34 to 37 are provided so as'to-non-conductive connect them to the surfaces of the belts 20 to 23.
  • the conductive rings 34 and 35 of the pulleys 27 and 29 are, in turn, connected to terminals 38a and 38b of a primary induction coil 38 wound on the shaft 25, and the conductive rings 36 and 37 of the pulleys 30 and 32 are connected to the terminals 39a and 39b of a primary induction coil 39 wound on the shaft 24, through ondary induction coils, lead wires 40 and 41, the
  • the magnetic head 16 is, in this manner, operated.
  • an output signal between the output terminals 105a and 105b of the magnetic sensor 16 appears at terminals 45a-and 45b of the secondary induction coil 45 through theinduction action between the primary induction coil 39 and the secondary induction coil which are connected through thev contact surfaces of the electrical conductive rings 36 and 37 as an electrical-conductive portion of the pulleys 30 and 32 and the belts 22 and 23 and the lead wires 42 and 43, whereby the desired transmission scanning can effectively be carried out.
  • the transmission scanning by means of the magnetic head 16 can be carried out by operating the belt 19, and the other belts 20 to 23 are also activated simultaneously with the belt 19 as illustrated.
  • the reference numerals 47 and 48 indicate shield plates made of ferrite or the like and interposed between the pulleys 28 and 30 and 29 and 31; 49 is a shield plate interposed between the belts 21' and 22.
  • shield plates 47 to 49 isolate the adjacent belts fromv magnetic induction which would otherwise be generated between-the adjacent belts 21 and 22.
  • the ,reference numerals 50 and 51 denote ferrite base layers covered around the outer peripheries of the shafts 24 and 25. These layers are interposed between the primary induction, coils 38 and 39 and the shafts 24 and 25, whereby supply and reception of a low frequency alternating current on the order of 10-50 hz., can positively be carried out by themagne'tic induction of the alternating current between the primary and secondary induction coils 38 and 46 or 39 and 45.
  • the reference nurneral 55 shows a recording head for reception scanning, which is a known inductive head made by winding a coil57 around a magnetic core 56 and forming a head portion H at the open end gap G of the core 56 as shown in FIG. 5.
  • This recording head 55 is provided on a belt which extends between the pulleys 58 and59,
  • this recording head 55 is not limited to the I are connected to the terminals 57a and 57b of the coil 57 of the head 55, respectively.
  • each of the main bodies 64a and 66a of the pulleys 64 and 66 are made of a non-electricalconductive material, but electrical-conductive rings 69 and are provided on the contact surfaces of the pulleys associated'with belts 61 and 62 to form electricalinduction coil 46, whereby the alternating exciting cur rent can be supplied between the exciting terminals 109a and 1095 of the magnetic wire 103 or the magnetic member104 of the magnetic head 16 through the magnetic induction between the primary and the secconductive portions, so as to electrically connect the rings and the belts at the contact surfaces of the belts 61 and 62 and the electrical-conductive rings 69 and 70 of the pulleys 64 and 66.
  • the electrical-conductive rings 69 and 70 are connected to terminals 71a and 7lb of a primary induction coil 71 which is wound around the shaft 25 through insulated lead wires 72 and 73, respectively.
  • Each of the other pulleys 58,59, 63, and 65 is made of aanon-electrical-conductive material.
  • the member 74 is a secondary induction coil wound around the outer periphery of the primary induction coil71 at intervals.
  • the received signal is supplied between both terminals 74a and 74b of the secondary induction coil 74, whereby the received signal can be supplied between the terminals 57a and 57b of the coil 57 of the recording head 55 through the magnetic induction between the primary and the secondary induction coils, lead wires 72 and 73, the contact surfaces of the electrical-conductive rings 69 and 70 and the belts 61 and'62.
  • the magnetic signal such as magnetic characters
  • the magnetic signal based on the signal received from the receiving section by means of the recording head 55 can effectivelybe received and scanned.
  • the magnetic signal of the-original-l is scanned and read out by the magnetic head 16in the above read out scanning section adjacent the moving sheet 8 and is transmitted to the-receiving section through the necessary signal treating circuit and the transmission section 14.
  • the-signal received by the receiving section 15 can be recorded as a magnetic latent image on the transfer magnetic sheet 8 by means of the recording head 55 of the record scanning section through the necessarysignal treating circuit.
  • the transfer magnetic sheet 8 is moved forward and passed through a developing section 78.
  • the members 97 to 99 are shield plates interposed between the pulleys 32-58 and '33 59 and between belts 23 and 60, and its effect is similar to that of the above described shield plates 47 to 49.
  • each belt in the above embodiment is'made of anelectrical-conductive material'and thebelt itself serves as an electrical conductive portion as shown in the embodiment, but each beltcan be made of a 'nonelectrical conductive material and an electricalconductive material could be coated thereon in the longitudinalj direction to form an electrical-conductive portion.
  • each belt for driving each belt, either one of the shafts is coupled with a driving mechanism and rotated thereby. This driving mechanism is not illustrated in the drawing in detail, but any of known driving mechanisms can be used.
  • the transmission and reception scanning sections described in accordance with FIGS. 2 to 6 are embodiments of a belt scanning system, but any other scanning systems such as drum scanning system, etc., can beiused.
  • the supply of the desired electric powder for scanning the magnetic head in the transmission scanning section or supply and reception of the signal can be prevented, and the supply and reception of the
  • the developing section 78 comprises a roller 5 and a coacting roller 77; Around the periphery of the roller 77 is adhered magneticpowder 76, which is stored in case 75. The powder is coated with synthetic resin. Therefore, the magnetic latent image on the transfer magnetic sheet 8 can be developed by the magnetic powder 76.
  • the developing portion 78 can also be constructed to inject the magnetic powder in a certain space so as to prepare an atmosphere of magnetic powder, by spraying the magnetic powder and by means of directly adhering themagnetic powder to the magnetic sheet by a brush or the like.
  • Reference numeral79 indicates a printing section, which consists of a pressing means for pressing a magnetic image on the transfer magnetic sheet 8 (developed at the developing section --onto recording paper 80, and a fixing means for fixing the transmitted magnetic powder 76 on the recording paper 80.
  • the recording paper 80 of the thus illustrated printing section 79 is passed between a roller 82 which is in contact with a bonding agent-81 and a coacting roller 83, and then passes between rollers 6 and 84 which act as a pressing means for pressing the magnetic image from the transfer magnetic sheet 8 onto the recording paper 80 and is further passed under a heating plate 85 which serves as a fixing rneans for'fixing the magnetic powder transferred tothe recording paper 80, and is then pulled in the direction of an arrow C by means of pullrollers 86 and 87 provided in front of the heating plate 85.
  • the pattern of the magnetic powder 76as a magnetic image of the magnetic sheet 8 is transferred onto the recording paper 80 since the pressed surface of the re- The recording paper 80 is removed, and if it is passed under the heating plate 85, the synthetic resin coating of the magnetic powder is heated and melts, whereby the magnetic powder can be fixed on the recording paper 80 as a visible image based on the magnetic image developed on the transfer magneticsheet 8.
  • the magnetic powder transferred to the recording paper 80 is fixed on the recording paper 80 by heated wax, or if a bonding agent containing a thermosetting resin instead of a usual bonding agent is used, if the magnetic pow-1? lO- der on the transfer magnetic sheet 8 is transferred to the recording paper 80 and fixedthereon by'heating and hardening the thermosetting resin contained in said bonding agent, a mere magnetic powder can be used.
  • the member 88 is a cleaning section for removing residual sediments of the magnetic powder and the bonding agent, and this cleaning section 88 is so constructed that the transfer magnetic sheet 8 is guided by means of the rollers 89 and 90, and the residual magnetic powder on the transfer magnetic sheet 8 or the bonding agent and other adhesives adhered at the time of transferring the image is removed by a sliding knife 91 at the operate during said process. Then, the magnetic latent image on the transfer magnetic sheet 8 can be erased when it passes through the demagnetizing section 92, and the above described process can be repeated as provided for a transfer or recording of a new magnetic latent image.
  • the transmitting original, the transfer magnetic'sheet for transferring such original, and the printing the information to the recording paper can all be carried out by magnetic means, and it is possible to scan it magnetically without confirming with the naked eye, so that the present invention is preferable to transmit or receive information from a document which should be kept secret.
  • the present invention is to magnetizes a magnetic signal such as magnetic characters-recorded on the original, presses the original to the transfer magnetic sheet and transfers it onto the transfer magnetic sheet by the alternating magnetic field, and transmits it to the receiving section, or records the information recorded on the original on the recording paper (reading out such that the recorded information which cannot optically be read out is read), so that any irregularity of the magnetic field of the magnetic signal such as magnetic characters recorded on the original is eliminated and the magnetic field of the magnetic signal re corded on the original may be standardized with uniform strength, whereby as compared with the case of the magnetic transmission or recording by means of a direct reading out of the information recorded on the original, the information recorded on the original can precisely and clearly be transmitted or recorded or read out.
  • the present invention carries out the transmission or reception of the signal by transferring or recording it to the transfer magnetic sheet, so that the quality of the signal is maintained, more particularly, the transfer magnetic sheet is endless, so that the repeating and continuous transmission or receipt of the signal is possible as long as the signal is not erased by the demagnetizing section, while the printing on the recording paper when receiving the signal can be carried out without requiring any dark. room, which is necessary for the conventional photoelectric recording, so that the device can be simplified and requisite perpheral equipment is minimized.
  • the present invention carries out the supply and reception of the signal betweenthe magnetic head and the transmitting section or the recording head and the receiving section inthescanning section by means of the magnetic induction of the induction coil so that the noise can be prevented and preciseness of the scanning can be improved.
  • the magnetically recorded original is directly read out, so that the magnetically recorded original can easily and promptly be read out while the conventional system requires the magnetic detecting means and hence magnetic recording means, and moreoverthe document is recorded magnetically and cannot be. read out optically or the numerals or symbols such as a deposit account, credit card, etc., can simply be read out.
  • a magnetic facsimile comprising:
  • magnetizing means positioned adjacent said receiving means for magnetizing the first magnetic signals on said record medium
  • pressing means operatively connected to said endless transfer magnetic sheet and said recording medium for pressing together the magnetized recording medium and said endless magnetic sheet;
  • a scanning means positioned downstream along the path of said endless sheet from said pressing means and having at least one recording head for recording a second magnetic signal onto said endless transfer magnetic sheet, said second magnetic signal'being received by a receiving means from an outside source, and having at least one magnetic head for reading a magnetic latent image on said endless transfer magnetic sheet for transmitting said signal to an outside station via a transmitting means;
  • induction coil means coupled to said scanning means for transferring signals from said endless magnetic sheet to the transmission means via said magnetic head and for transferring signals to the receiving means to said endless magnetic sheet via' said recording head;
  • ll 12 developing means positioned adjacent said endless printing means comprised of a pressing means for transfer magnetic sheet downstream vfrom said pressing the magnetic image onto the recording scanningmeans for developing the magnetic latent paper by transferring the magnetic powder and a image on said endless sheet by means of a magnetic fixing means for fixing the magnetic powder onto powder, said powder being coated onto said end the recording paper; and less sheet; demagnetizing means positioned along the path of printing means positioned along the path of travel of said endless sheet downstream of said printing said endless sheet and downstream from the develmeans for erasing the magnetic image on said opment means for transferring a magnetic image transfer magnetic sheet. from said endless sheet to a recording paper, said 0 Y

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Facsimiles In General (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Fax Reproducing Arrangements (AREA)
US00308944A 1971-12-09 1972-11-24 Magnetic facsimile and read-out device for original Expired - Lifetime US3852525A (en)

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JP46099076A JPS5148853B2 (enrdf_load_stackoverflow) 1971-12-09 1971-12-09

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US (1) US3852525A (enrdf_load_stackoverflow)
JP (1) JPS5148853B2 (enrdf_load_stackoverflow)
DE (1) DE2259354A1 (enrdf_load_stackoverflow)
FR (1) FR2166998A5 (enrdf_load_stackoverflow)
GB (1) GB1422958A (enrdf_load_stackoverflow)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3946404A (en) * 1975-04-25 1976-03-23 General Electric Company Direct current bias fields for magnetic printing
US3987491A (en) * 1974-07-22 1976-10-19 Cubic Photo Products Division Latent magnetic image transfer apparatus
FR2325511A1 (fr) * 1975-09-26 1977-04-22 Xerox Corp Procede de production de caracteres sur des bandes magnetiques
US4034409A (en) * 1975-04-16 1977-07-05 Sidney Levy Method and apparatus for magnetically recording graphic information
US4038665A (en) * 1975-09-26 1977-07-26 Xerox Corporation Recording with donor transfer of magnetic toner
US4067018A (en) * 1975-08-27 1978-01-03 Xerox Corporation Excessive magnetic developer displacement system
US4074276A (en) * 1976-05-26 1978-02-14 Xerox Corporation Magnetic imaging system using heat
US4107742A (en) * 1975-05-30 1978-08-15 Sidney Levy Method and apparatus for recording graphic information magnetically
US4175265A (en) * 1976-10-28 1979-11-20 Am International, Inc. Toner transfer system
DE3213945A1 (de) * 1981-04-21 1982-11-11 Iwatsu Electric Co., Ltd., Tokyo Verfahren und vorrichtung zum erzeugen eines latenten bildes
DE3214011A1 (de) * 1981-04-21 1982-11-11 Iwatsu Electric Co., Ltd., Tokyo Vorrichtung zum erzeugen latenter bilder
US4382264A (en) * 1980-10-24 1983-05-03 Xerox Corporation Magnetic imaging transfer process
US4409598A (en) * 1980-08-25 1983-10-11 Xerox Corporation Magnetic imaging
US4513326A (en) * 1979-04-20 1985-04-23 Iwatsu Electric Co., Ltd. Magnetic printing machine employing a multi-channel recording head with minimal cross-talk with secondary scanning head movement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5432328A (en) * 1977-08-16 1979-03-09 Iwatsu Electric Co Ltd Magnetic printer

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US2826634A (en) * 1951-04-14 1958-03-11 Atkinson Method and means for magnetic reproduction of pictures
US2841461A (en) * 1952-07-26 1958-07-01 Gen Dynamics Corp Apparatus for magnetic printing
US2932278A (en) * 1955-05-03 1960-04-12 Sperry Rand Corp Single print magnetic printer
US3141170A (en) * 1959-06-24 1964-07-14 Ibm High speed printing apparatus
US3735416A (en) * 1971-04-30 1973-05-22 Data Interface Associates Magnetic printing system
US3749833A (en) * 1972-02-14 1973-07-31 Pelorex Corp Facsimile transmission system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2826634A (en) * 1951-04-14 1958-03-11 Atkinson Method and means for magnetic reproduction of pictures
US2841461A (en) * 1952-07-26 1958-07-01 Gen Dynamics Corp Apparatus for magnetic printing
US2932278A (en) * 1955-05-03 1960-04-12 Sperry Rand Corp Single print magnetic printer
US3141170A (en) * 1959-06-24 1964-07-14 Ibm High speed printing apparatus
US3142840A (en) * 1959-06-24 1964-07-28 Ibm High-speed printing apparatus
US3735416A (en) * 1971-04-30 1973-05-22 Data Interface Associates Magnetic printing system
US3749833A (en) * 1972-02-14 1973-07-31 Pelorex Corp Facsimile transmission system

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3987491A (en) * 1974-07-22 1976-10-19 Cubic Photo Products Division Latent magnetic image transfer apparatus
US4068239A (en) * 1974-07-22 1978-01-10 Addressograph Multigraph Corporation Latent magnetic image transfer method and apparatus
US4034409A (en) * 1975-04-16 1977-07-05 Sidney Levy Method and apparatus for magnetically recording graphic information
US3946404A (en) * 1975-04-25 1976-03-23 General Electric Company Direct current bias fields for magnetic printing
US4107742A (en) * 1975-05-30 1978-08-15 Sidney Levy Method and apparatus for recording graphic information magnetically
US4067018A (en) * 1975-08-27 1978-01-03 Xerox Corporation Excessive magnetic developer displacement system
FR2325511A1 (fr) * 1975-09-26 1977-04-22 Xerox Corp Procede de production de caracteres sur des bandes magnetiques
US4030105A (en) * 1975-09-26 1977-06-14 Xerox Corporation Technique of character generation on magnetic tapes
US4038665A (en) * 1975-09-26 1977-07-26 Xerox Corporation Recording with donor transfer of magnetic toner
US4074276A (en) * 1976-05-26 1978-02-14 Xerox Corporation Magnetic imaging system using heat
US4175265A (en) * 1976-10-28 1979-11-20 Am International, Inc. Toner transfer system
US4513326A (en) * 1979-04-20 1985-04-23 Iwatsu Electric Co., Ltd. Magnetic printing machine employing a multi-channel recording head with minimal cross-talk with secondary scanning head movement
US4409598A (en) * 1980-08-25 1983-10-11 Xerox Corporation Magnetic imaging
US4382264A (en) * 1980-10-24 1983-05-03 Xerox Corporation Magnetic imaging transfer process
DE3213945A1 (de) * 1981-04-21 1982-11-11 Iwatsu Electric Co., Ltd., Tokyo Verfahren und vorrichtung zum erzeugen eines latenten bildes
DE3214011A1 (de) * 1981-04-21 1982-11-11 Iwatsu Electric Co., Ltd., Tokyo Vorrichtung zum erzeugen latenter bilder

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Publication number Publication date
JPS5148853B2 (enrdf_load_stackoverflow) 1976-12-23
FR2166998A5 (enrdf_load_stackoverflow) 1973-08-17
DE2259354A1 (de) 1973-06-28
JPS4864826A (enrdf_load_stackoverflow) 1973-09-07
GB1422958A (en) 1976-01-28

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