US3141404A - Novel imaging process - Google Patents

Novel imaging process Download PDF

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Publication number
US3141404A
US3141404A US102598A US10259861A US3141404A US 3141404 A US3141404 A US 3141404A US 102598 A US102598 A US 102598A US 10259861 A US10259861 A US 10259861A US 3141404 A US3141404 A US 3141404A
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US
United States
Prior art keywords
images
sheet
copy sheet
master
sensible
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
US102598A
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English (en)
Inventor
Douglas A Newman
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.)
Columbia Ribbon and Carbon Manufacturing Co Inc
Original Assignee
Columbia Ribbon and Carbon Manufacturing Co Inc
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 Columbia Ribbon and Carbon Manufacturing Co Inc filed Critical Columbia Ribbon and Carbon Manufacturing Co Inc
Priority to US102598A priority Critical patent/US3141404A/en
Priority to DE19621421400 priority patent/DE1421400A1/de
Priority to GB14144/62A priority patent/GB995278A/en
Application granted granted Critical
Publication of US3141404A publication Critical patent/US3141404A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/382—Contact thermal transfer or sublimation processes
    • B41M5/38285—Contact thermal transfer or sublimation processes characterised by magnetic components in the transfer ink

Definitions

  • This invention relates to the novel method for placing magnetizable images on the surface of a copy sheet directly from a master sheet having thereon images comprising an infrared radiation-absorbing heat meltable composition.
  • a copy sheet or record card bearing such images is introduced into processing equipment containing a suitable sensing device such as a reading head assembly which produces electrical signals when magnetized areas are passed across the reading head. These electrical signals are analyzed by the processing equipment which automatically determines the identity of the sensed character, and then records, sorts, computes or duplicates the same depending upon the nature of the equipment used.
  • the accuracy of the sensing equipment depends almost entirely upon the sharpness and clarity of the magnetic images being sensed. Certain images are very similar to others, and when these images are not sharply and clearly defined, there is a possibility of the images being misread by the sensing device. Likewise a ragged edge or a void on the image can distort the electrical signal generated by the image.
  • FIGURE 1 is a perspective view of an imaged master sheet or card shown together with magnetic transfer sheet 20, the master having images 11 thereon pressuretransferred from the transfer layer 21 of the transfer sheet.
  • FIG. 2 is a diagrammatic cross section, to an enlarged ice scale, of the imaged master 10 superposed with a copy sheet 30, separated for purposes of illustration, and under the effects of infrared radiation 50.
  • FIG. 3 illustrates the sheet of FIG. 2, after irradiation, demonstrating the magnetically sensible images 30a transferred from sheet 10 to copy sheet 30 by means of heat.
  • the transfer sheets of the present invention are prepared by coating a suitable flexible plastic or paper foundation sheet with a suitable pressure-transferable magnetic composition having the property of fusing and becoming tacky and adhesive under the effects of the heat generated by absorbed infrared radiation.
  • the composition of the transfer layer 21 forms a critical part of the present invention in that such composition becomes transferred to the copy sheet or record card surface in the form of images 30a which are magnetically sensible and thus must be of such precise sharpness and clarity as to function properly in magnetic processing equipment.
  • the transfer composition must be both heatand pressure-transferable. It must have the property of absorbing infrared radiation and to a degree suflicient to reduce the composition to a fused, tacky and adhesive condition. Finally, the transfer composition must contain magnetically sensible pigment.
  • the transfer composition be so constituted as to have no sharp melting temperature so that the fusing and melting of the composition in the form of images 11 take place over a temperature range of several degrees. In this manner, the images first soften and become tacky and adhesive and thus adhere sharply to the copy sheet or record card surface and the over-all melting of the images occurs slowly and gently. If a composition having a sharp melting temperature is employed, then the images 11 liquefy suddenly and abruptly and tend to spread on the copy sheet surface causing the formation of wide blurred images which cannot be accurately sensed by the processing equipment. Excellent results have been obtained when the transfer composition contains a mixture of different binder materials, either waxes or thermoplastic resins, and preferably mixtures thereof, having different melting temperatures.
  • the following examples are illustrative of suitable transfer compositions, and are set forth by way of illustration rather than limitation.
  • Example 1 Ingredients: Parts by weight Carnauba wax 35 Indopol I-I-300 (polymerized butene isomers) 15 Black iron oxide 40 Mineral oil 10
  • Example 2 Ingredients:
  • Raw montan wax 40 Carnauba wax 5
  • Black iron oxide 30 Carbon black 10 Rapeseed oil 5
  • Example 3 Ingredients:
  • the magnetic pigment and the radiation-absorbing pigment be present in an amount equal to from about 30 percent to about 60 percent based upon the total weight of the transfer composition.
  • the transfer composition preferably has a relatively high melting point in excess of about 150 C. and thus comprises higher melting point waxes such as carnauba and raw montan wax as the major part by weight of the binder mixture.
  • the binder mixture contain a thermoplastic resin material such as ethyl cellulose, polyvinyl butyrate, Arochlor (chlorinated biphenyl) and others, including those shown in the foregoing examples.
  • the master sheet or card 110 to be imaged with any of the above compositions is preferably translucent or transparent and may be paper or a plastic film such as Mylar (polyethylene terephthalate), polyvinyl fluoride, polyethylene or the like, preferably frosted, undercoated or otherwise treated to render the surface more receptive to the transfer composition.
  • the master sheet is preferably imaged with mirror-reverse images by placing the master against the transfer layer of transfer sheet 20 and typing against the back of the master to produce reverse images as illustrated by FIG. 1 of the drawing.
  • the master having pressure-inscribed images 11 thereon is next superposed with any suitable copy sheet or record card 30 so that the images are in contact with the copy surface.
  • the sheets are then subjected to a light source 50 rich in infrared radiation which is directed against the back of the master, as shown in FIG. 2, for a period of time sufiicient to fuse and melt the images and allow them to adhere to the copy surface.
  • a light source 50 rich in infrared radiation which is directed against the back of the master, as shown in FIG. 2
  • portions of the images 11 have been picked off by the copy surface in the form of direct-reading magnetically sensible images 30a, as shown by FIG. 3, leaving remnant portions 11a on the master sheet available for the imaging of several additional copy sheets or record cards in the same manner.
  • the master sheet retains its original property of also being magnetically sensible and may be automatically processedand filed until additional copies are desired.
  • infrared radiation forms a critical part of the present invention in that it allows for selective heating of the images on the master sheet or card without materially heating the master sheet foundation or the copy sheet or card.
  • the heated images transfer sharply and cleanly to the relatively cool copy surface, and this is critical in the magnetic sensing field where the accuracy of the sensing process depends ultimately upon the quality of the magnetic images 30a on the copy sheet or record card.
  • the method of placing on a copy sheet sharp clear magnetically-sensible images which are devoid of ragged edges comprising the steps of superposing a copy sheet in surface contact with the images on a master sheet, said images being infrared radiation-absorbing and containing magnetically-sensible pigment dispersed in a binder material having a broad melting range so that melting of the images takes place over a temperature range of several degrees, directing a sufficient quantity of radiation rich in infrared against the superposed sheets so that it is selectively absorbed by the images on the master sheet and gradually heats them to their melting range without materially heating the master sheet and the copy sheet, whereby the images soften and become tacky without abrupt liquefication and adhere to the surface of the copy sheet in sharp clear image form, and separating the copy sheet from the master sheet to provide on the copy sheet said sharp clear magnetically-sensible images which are devoid of ragged edges which would cause a distorted signal to be generated by the images in the magnetic sensing process.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Credit Cards Or The Like (AREA)
  • Printing Methods (AREA)
US102598A 1961-04-12 1961-04-12 Novel imaging process Expired - Lifetime US3141404A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US102598A US3141404A (en) 1961-04-12 1961-04-12 Novel imaging process
DE19621421400 DE1421400A1 (de) 1961-04-12 1962-04-10 Verfahren zur Erzeugung magnetisch und optisch empfindlicher Bilder auf einem Kopierbogen und dabei verwendeter Umdrucktraeger
GB14144/62A GB995278A (en) 1961-04-12 1962-04-12 Improvements in or relating to transfer sheets and methods of use

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US102598A US3141404A (en) 1961-04-12 1961-04-12 Novel imaging process

Publications (1)

Publication Number Publication Date
US3141404A true US3141404A (en) 1964-07-21

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Application Number Title Priority Date Filing Date
US102598A Expired - Lifetime US3141404A (en) 1961-04-12 1961-04-12 Novel imaging process

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US (1) US3141404A (de)
DE (1) DE1421400A1 (de)
GB (1) GB995278A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232226A (en) * 1960-11-16 1966-02-01 Agfa Ag Printing apparatus
US3421894A (en) * 1966-01-13 1969-01-14 Ncr Co Recording process utilizing 6'-nitro-1,3,3 - trimethyl-benzoindolinospiropyran dispersed in heat-meltable wax
US3463289A (en) * 1967-10-10 1969-08-26 David C Prince Data reading system
US3589289A (en) * 1966-12-22 1971-06-29 Burroughs Corp Printing members and methods for graphic composition
US20140166196A1 (en) * 2012-12-15 2014-06-19 Michael Flynn Golf ball alignment device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4123580A (en) * 1977-06-23 1978-10-31 Minnesota Mining And Manufacturing Company Color source sheet with rubber binder
JPS57174296A (en) * 1981-04-21 1982-10-26 Nippon Telegr & Teleph Corp <Ntt> Heat transfer magnetic recording medium

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2501495A (en) * 1944-05-05 1950-03-21 Ibm Copying process
US2744031A (en) * 1949-10-15 1956-05-01 Ncr Co Sheet having a transferable coating containing magnetizable material
US2808777A (en) * 1952-02-26 1957-10-08 Dick Co Ab Method for manufacturing duplicating masters
US2954311A (en) * 1957-09-25 1960-09-27 Weel Walter H Vander Method for copying indicia by particle transfer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2501495A (en) * 1944-05-05 1950-03-21 Ibm Copying process
US2744031A (en) * 1949-10-15 1956-05-01 Ncr Co Sheet having a transferable coating containing magnetizable material
US2808777A (en) * 1952-02-26 1957-10-08 Dick Co Ab Method for manufacturing duplicating masters
US2954311A (en) * 1957-09-25 1960-09-27 Weel Walter H Vander Method for copying indicia by particle transfer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232226A (en) * 1960-11-16 1966-02-01 Agfa Ag Printing apparatus
US3421894A (en) * 1966-01-13 1969-01-14 Ncr Co Recording process utilizing 6'-nitro-1,3,3 - trimethyl-benzoindolinospiropyran dispersed in heat-meltable wax
US3589289A (en) * 1966-12-22 1971-06-29 Burroughs Corp Printing members and methods for graphic composition
US3463289A (en) * 1967-10-10 1969-08-26 David C Prince Data reading system
US20140166196A1 (en) * 2012-12-15 2014-06-19 Michael Flynn Golf ball alignment device

Also Published As

Publication number Publication date
DE1421400A1 (de) 1968-10-24
GB995278A (en) 1965-06-16

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