US3641585A - Apparatus for displaying and printing information - Google Patents

Apparatus for displaying and printing information Download PDF

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Publication number
US3641585A
US3641585A US853182A US3641585DA US3641585A US 3641585 A US3641585 A US 3641585A US 853182 A US853182 A US 853182A US 3641585D A US3641585D A US 3641585DA US 3641585 A US3641585 A US 3641585A
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US
United States
Prior art keywords
band
image
recording medium
magnetic
print
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 - Lifetime
Application number
US853182A
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English (en)
Inventor
Robert James Hodges
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.)
STC PLC
Original Assignee
International Standard Electric Corp
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Publication date
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Publication of US3641585A publication Critical patent/US3641585A/en
Assigned to STC PLC reassignment STC PLC ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: INTERNATIONAL STANDARD ELECTRIC CORPORATION, A DE CORP.
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Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
    • G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
    • G06K15/14—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by electrographic printing, e.g. xerography; by magnetographic printing
    • 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
    • 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
    • G11B5/62—Record carriers characterised by the selection of the material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/37—Printing employing electrostatic force

Definitions

  • ABSTRACT I Forelgn Apphcamn mofity Dam Apparatus for display and printing of received information by Nov. 14, 1968
  • Great Britain ..53,999/68 means of a continuous recording band of stainless Steel of the type which when selectively magnetized forms the resulting in- [52] U.S. Cl ..346/74 MP, l78/6.6 A, 346/74 ES fomlafio" Pattern throughout the thickness of the bani The [51] 1m.
  • 01 ..G03gl5/l6,G03g 15/22, 603g 19/00 band is POW/1er treated on the one Side for viewing the 581 Field or Search ..346/74 MP, 74 ES; 117/115, image P herein and is Powder treated the Side 1 37.
  • An alternative embodiment pro- 1 e e Cited vides for a single twist in the band whereby it is first treated for UNlTED STATES T N S viewing and then in accordance with the twist is recycled for purposes of generating permanent copy.
  • the invention provides apparatus for. displaying and-printinginformation contained in a signal applied thereto, wherein a print band is selectively magnetized such that a pattern representative of ,the information. is formed throughout the thickness of the print band; wherein the magnetic pattern on one side'of the print band is presented to view'by depositing on the one side a medium which adheres to the magnetic pattern; wherein a medium is deposited on the other side of the print band which adheres to the magnetic pattern thereon, and which iswholly transferable therefrom to a permanent record; and wherein the displayed and permanent patterns as viewed are the same way round.
  • theapparatus shown diagrammatically therein in side view is one arrangement according to the invention for presenting in visible form to an observer information received in the form of electrical signals, theinformation displayed being large, clearly legible and capable of rapid and semicontinuous change as the information received changes,
  • the apparatus may conveniently be divided for description into its display and printing portion.
  • the display portion of the apparatusshown in FIG! I includes a band 1 of any convenient width-typically 9 or 12 inches-guided in a closed loop by a. series of rollers 2.
  • a motor drives the tape loop in the direction of the arrows A, either continuously or'under the control of input signals.
  • a magneticv recording head 3 is placed adjacent to the band 1 so that when energized by suitable electrical signals, the head forms a pattern'of magnetic charges across the full width of the band.
  • the magnetic pattern formed by the head 3 on the surface 4 of the band 1 will be recorded throughout the thickness of the band I; thus a magnetic pattern will be formed on the surface 5 of the band which is the inverse of the magnetic pattern on the surface 4 thereof.
  • the pattern of charges on the surface 4' of the band 1 correspond to the visual imageto be presented and the pattern of charges on the surface 5 of the band I is utilized to provide a permanent copy or'copies of the displayed information.
  • Suitable stainless steels forthe band 1 are stainless steels which have been manufactured to E.N.6.0 or E.N.58A standards.
  • the charged hand then passes through a dispenser 7 which applies to the surface 4 of the band 1 a finely dividedmagnetic powder whose color provides adequate contrast with the background of the band.
  • the powder adheres to the surface 4 of the band 1 in a pattern corresponding to the pattem'of magnetic charges formed. by the head 3, and renders this pattern visible.
  • the band 1 then passes to a display position where it can be viewed through a window 13in the casing. of the apparatus.
  • the charge pattern laid down by the recording head 3 must thereforebe composed of true images.
  • the band 1 completes its circuit by passing through a print- 4 is removed. It then returns to the magnetizing head 3; de-
  • a preliminary demagnetizing process indicated in the drawing by the presence of a demagnetizing head 3a, may or may not be required.
  • the apparatus as so far described thus provides a means by which informationreceived over an electrical input line can be rendered visible.
  • information is here used in its widest sense and the apparatus may be used equally to display alphabetical or numerical matter, pictorial matter such as graphs, diagrams, or maps, or facsimile productions of any type of original.
  • code conversion will be required'in the driving circuits of the magnetic head 3 in order to create a pattern of magnetic charges corresponding, for example, to a numerical input signal; on the other hand with certain forms of recording head and with an input derived from the line-by-line scanning of an original, the input signals may be applied directly to the elements of the magnetic head.
  • the magnetic head 3 may itself take many forms and will therefore not be dealt with in any detail in this specification. However, for completeness it should be pointed out that a distinction should be drawn between one-dimensional" heads which operate with magnetic band 1 moving across the head, building up apattern by a line-by-line mosaic process, and two-dimensional heads that are usually operated with no relative movement between the head and the band, build up a pattern over an appreciable area of the band I, which is then stepped up to expose a new area to the head.
  • the different approach to the mechanics of driving the band I, and also the associated printing apparatus about to be described, inherent in these different systems will beevident and will not be disclosed in detail.
  • the powder applied to the band by the dispenser 7 may be any finely divided magnetic material, a ferrite powder being suitable.
  • the color of the powder is preferably dark to provide the highest possible contrast with the surface of the band I on which it is deposited.
  • the band I may be illuminated when in the display position by means of a lamp (not shown in the drawing).
  • the printing portion of the apparatus shown in FIG. I includes a dispenser 6 which applies to the surface 5 of the band a finely divided magnetic powder which adheres to the surface 5 of the band I in a pattern which is the inverse of the pattern of magnetic charges formed by the head 3 on the surface 4 of the band.
  • the powder applied to the surface 5 of the band I by the dispenser 6 may be any finely divided magnetic material, a fer.- rite powderbeing suitable.
  • the individual powder grains are coated with a thermal fixing agent such as a thermoplastic resin to permit thermal fixing of a printed copy desired as a permanent record.
  • the printing station 9 of the apparatus includes a paper supply reel 10 from which a continuous web of paper is fed over a pressure roller 9b which presses it against the surface 5 of the band I, the linear speeds of the band and paper being at this point the same.
  • This pressure transfers to the paper the powder pattern carried by the surface 5 of the band I.
  • the pattern of course, suffers a reversal in the process but it will be recalled that this reversal has already been taken into account, i.e., since the charge pattern on the surface 4 of the band 1 is composed of true images, the images which form the charge pattern on the surface 4 of the band I must be mirror images.
  • the paper web 11 is then passed through a heating device 15 which fixes the powder pattern on the surface of the paper, and is then delivered to the outside of the apparatus at a suitable delivery point.
  • a pair of rollers 12 having their rotational axes at right angles to the rotational axes of the rollers 9a, are provided, and the paper web I ispassed between the rollers 12 thereby causing it to be twisted through an angle of 90 and allowing it to be passed over the edge of the band I to the delivery point.
  • the scavenging unit 8b is utilized to remove any excess powder left on the surfaces of the band 1 after the printing operation.
  • FIG. 1 has been described in somede'tail as representing a typical general layout for display and printing apparatus embodying the invention. There are, of course, numerous alternative arrangements, some of which will be briefly discussed in the subsequent description. Again, the mode of operation of the apparatus and the specific design of the recording head 3 are very largely tied together and each of the individual recording heads makes its own particular demands on the rest of the apparatus. To explain these points at length in each particularcase is obviously undesirable, since the necessary modifications will be evident to the reader of ordinary skill.
  • the dispensers 6v and 7 may take the form of any one of the fluid powder beds outlined in British Patent Specification No. 1,120,900 or alternatively, the dispensers may be provided by either a plain powder box or a mechanical powdering device, for example, some of the powdering devices outlined in my copending U.S. Patent Applications 770,475 filed Oct. 25, 1968, and now abandoned 770,691 filed Oct. 25, 1968, and now abandoned and 8l2,230 filed Apr. l, 1969.
  • the general arrangement of the apparatus according to FIG. 1 is capable of being modified.
  • the magnetic pattern formed on the surface 4 of the band 1 by the recording head 3 could be composed of mirror images in which case the magnetic pattern on the surface 5 of the band 1 would be composed of true images.
  • the apparatus according to FIG, 1 would need to be modified in a manner as shown diagrammatically in the drawing according to FIG. 2 in order to effect an inversion of the magnetic pattern on the surfaces 4 and 5 of the band 1 thereby rendering them suitable for direct viewing and the obtaining of a permanent record.
  • an extra guide roller 17 which causes that part of the band 1 which is to be displayed to move in a horizontal plane relative to an aperture 19b in the casing 14, and the band is viewed, in a mirror 19 arranged at 45 to the plane of the displayed section of the band 1, through the window 13 in the casing of the apparatus.
  • the mirror 19 causes inversion of the displayed image, and if required a lamp 19a is provided for illuminating the band 1 when in the display position.
  • the surface 5 of the band I after passing through the dispenser 6 comes in contact with the transfer roller 18 and the powder pattern is transferred under pressure from the surface 5 to the transfer roller 18.
  • the transfer roller 18 then comes in contact withthe moving strip of paper 11 which has the same linear velocity as the transfer roller 18.
  • the pressure roller 9b presses the paper strip II against the transfer roller 18, andthe powder pattern is transferred under pressure from the transfer roller 18 to the paper surface such that it is the right way round. Any powder particles remaining on the surface of the transfer roller 18 after the powder pattern has been transferred to the paper strip 11 rnay be removed by vacuum extraction means 20 before the su face of the transfer roller I8 again engages the surface 5 of the band Special transfer techniques are required as the powder will not readily adhere to a conventional smooth transfer roller.
  • the roller 18 may be recorded with a continuous mosaic of magnetic dots on a surfacecoating of magnetic material or the surface of the transfer roller could be made tacky with a thin coating of grease or a suitable adhesive.
  • the mosaic of magnetic dots will pick up the powdered image from the surface 5 of this band 1 without disturbing the quality of the image.
  • the transfer to the paper strip 11 would be effected as previously described, by pressure into the paper fibers and subsequent heating. However, the heating generated as a consequence of the pressure which is applied during transfer may prove to be sufficient to effect the thermal bonding of the powder particles which form the images, in which case the heating means 15 will not be required.
  • the adhesive may in practice be applied to the surface of the transfer roller 18 prior to it contacting the surface 5 of the band 1 by means not shown in the drawing, the adhesive facilitating the transfer of the powder from the surface 5 to the surface of the transfer roller 18.
  • the transfer of the powder pattern to a substrate, for example the paper strip 11, to provide a permanent record would be effected as previously described for the roller having the mosaic of magnetic dots on the surface thereof.
  • the vacuum extraction means shown in the drawing according to FIG. 2 would be replaced by extraction means which would remove both the grease or suitable adhesive and powder particles remaining after the powder pattern has been transferred to the paper strip 11. Afterpassing the extraction means more adhesive 2 would be applied to the surface of the transfer roller 18 before it again contacts the surface 5 of the band I.
  • FIGS. 1 and 2 are considered as plan views instead of side views then they would be representative of the apparatus according to the invention having a horizontal band. It would of course for these arrangements be necessary to modify the dispensers 6 and 7 such that they are suitable for powdering a horizontal band, for example the dispensers 6 and 7 may be provided by some of the mechanical powdering devices outlined in my copending U.S. Patent Applications 770,475 filed Oct. 25, 1968, 770,691 filed Oct. 25, I968, and
  • the recording of the magnetiopattern throughout the thickness of the band is effected as before with the magnetic recording head 3 situated adjacent to the band 1 i.e., the magnetic pattern on the surface of the band 1 adjacent to the magnetic recording head 3, which corresponds to the visual image to be presented, will be the inverse of the magnetic pattern on the other side of the band 1.
  • the operator of the apparatus After the first revolution of the mobius" band 1 the operator of the apparatus, if requiring a permanent record of the previously displayed information, must render the demagnetizing head 3a and the recording head 3 inoperative and start a print mode of operation by energizing the motor 9d and the solenoid 90.
  • the dispenser 6 When the dispenser 6 is next encountered during the print mode it is the surface of the mobius band 1 with the inverse magnetic pattern thereon which is powdered with the finely divided magnetic powder thus the powdered images which are presented at the display position of the apparatusduring the second revolution of the mobius band 1 are mirror images. Since the solenoid 9c and the motor 9d have been energized, a permanent copy of the displayed information will be delivered to the outside of the apparatus at a suitable delivery point.
  • the band 1 After passing through the printing station, the band 1 again encounters the scavenger 8 whereat any excess powder left on the surface of the band after the print operation is removed and then returns to the magnetizing head 3; depending on the mode of operation of the latter, a preliminary demagnetizing process, indicated in the drawing by the presence of the demagnetizing head 3a, may or may not be required.
  • a magnetizable recording medium which when selectively magnetized to create an image therein. is capable of providing the magnetic image throughout the thickness thereof in order to be available on both sides of said medium, with the image on the one side being the reverse of the other;
  • second means for depositing on both sides of said selectively magnetized medium a developing medium which is attractable to the magnetic image and which renders said image visible on both sides of said recording medium, with one side of the developed image being presented in true image form in a display mode; and d. print means for transferring thedeveloped image on the said recording medium being in the form of an endless movable print band arranged in a mobius" loop, and wherein said second means and said print means are sta tionarily arranged relative to said mobius" loop such that the magnetic image on the one side of the print band is developed and presented to view during a first revolution of said loop, and the permanent record is obtained from the developed image on the other side during the following revolution of said loop.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Printing Methods (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Duplication Or Marking (AREA)
US853182A 1968-11-14 1969-08-26 Apparatus for displaying and printing information Expired - Lifetime US3641585A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5399968 1968-11-14

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US3641585A true US3641585A (en) 1972-02-08

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US (1) US3641585A (enrdf_load_stackoverflow)
BE (1) BE744389A (enrdf_load_stackoverflow)
DE (1) DE1955458A1 (enrdf_load_stackoverflow)
FR (1) FR2023281A1 (enrdf_load_stackoverflow)
GB (1) GB1230022A (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3781903A (en) * 1971-11-08 1973-12-25 Bell & Howell Co Magnetic imaging methods and media
US3825936A (en) * 1972-05-24 1974-07-23 Data Interface Toner applicator for magnetic printing system
US3858514A (en) * 1972-08-28 1975-01-07 Minnesota Mining & Mfg Data accumulation system providing magnetic toner powder recording
US4074276A (en) * 1976-05-26 1978-02-14 Xerox Corporation Magnetic imaging system using heat
US4380768A (en) * 1980-08-04 1983-04-19 Dataproducts Corporation Magnetic printer and printhead
US4460907A (en) * 1982-06-15 1984-07-17 Minnesota Mining And Manufacturing Company Electrographic imaging apparatus
US4547787A (en) * 1982-01-25 1985-10-15 Canon Kabushiki Kaisha Image forming apparatus with displaying and printing functions
US4641157A (en) * 1982-12-20 1987-02-03 Canon Kabushiki Kaisha Image display device
US4646164A (en) * 1982-07-07 1987-02-24 Canon Kabushiki Kaisha Image display apparatus
US4647982A (en) * 1982-07-09 1987-03-03 Canon Kabushiki Kaisha Image display apparatus capable of starting display of a new image in response to designation thereof prior to completion of display of a previously designated image

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2496047A (en) * 1947-06-18 1950-01-31 Rca Corp Art of recording and reproducing two-sided magnetic records
US2793135A (en) * 1955-12-01 1957-05-21 Sperry Rand Corp Method and apparatus for preparing a latent magnetic image
US2826634A (en) * 1951-04-14 1958-03-11 Atkinson Method and means for magnetic reproduction of pictures
US2959638A (en) * 1955-06-03 1960-11-08 Sperry Rand Corp Magnetic printer
US2985135A (en) * 1959-05-28 1961-05-23 Ibm Magnetic typewriter
US3526708A (en) * 1965-11-09 1970-09-01 Heller William C Jun Magnetic through-field apparatus and process for printing by imbedding particles in a record medium

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2496047A (en) * 1947-06-18 1950-01-31 Rca Corp Art of recording and reproducing two-sided magnetic records
US2826634A (en) * 1951-04-14 1958-03-11 Atkinson Method and means for magnetic reproduction of pictures
US2959638A (en) * 1955-06-03 1960-11-08 Sperry Rand Corp Magnetic printer
US2793135A (en) * 1955-12-01 1957-05-21 Sperry Rand Corp Method and apparatus for preparing a latent magnetic image
US2985135A (en) * 1959-05-28 1961-05-23 Ibm Magnetic typewriter
US3526708A (en) * 1965-11-09 1970-09-01 Heller William C Jun Magnetic through-field apparatus and process for printing by imbedding particles in a record medium

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3781903A (en) * 1971-11-08 1973-12-25 Bell & Howell Co Magnetic imaging methods and media
US3825936A (en) * 1972-05-24 1974-07-23 Data Interface Toner applicator for magnetic printing system
US3858514A (en) * 1972-08-28 1975-01-07 Minnesota Mining & Mfg Data accumulation system providing magnetic toner powder recording
US4074276A (en) * 1976-05-26 1978-02-14 Xerox Corporation Magnetic imaging system using heat
US4380768A (en) * 1980-08-04 1983-04-19 Dataproducts Corporation Magnetic printer and printhead
US4547787A (en) * 1982-01-25 1985-10-15 Canon Kabushiki Kaisha Image forming apparatus with displaying and printing functions
US4460907A (en) * 1982-06-15 1984-07-17 Minnesota Mining And Manufacturing Company Electrographic imaging apparatus
US4646164A (en) * 1982-07-07 1987-02-24 Canon Kabushiki Kaisha Image display apparatus
US4647982A (en) * 1982-07-09 1987-03-03 Canon Kabushiki Kaisha Image display apparatus capable of starting display of a new image in response to designation thereof prior to completion of display of a previously designated image
US4641157A (en) * 1982-12-20 1987-02-03 Canon Kabushiki Kaisha Image display device

Also Published As

Publication number Publication date
FR2023281A1 (enrdf_load_stackoverflow) 1970-08-07
BE744389A (fr) 1970-07-14
GB1230022A (enrdf_load_stackoverflow) 1971-04-28
DE1955458A1 (de) 1970-06-04

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Owner name: STC PLC,ENGLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:INTERNATIONAL STANDARD ELECTRIC CORPORATION, A DE CORP.;REEL/FRAME:004761/0721

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Owner name: STC PLC, 10 MALTRAVERS STREET, LONDON, WC2R 3HA, E

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Effective date: 19870423