US3699586A - Copying device including radiation sensitive members electrically responsive to the reflected image - Google Patents

Copying device including radiation sensitive members electrically responsive to the reflected image Download PDF

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Publication number
US3699586A
US3699586A US33466A US3699586DA US3699586A US 3699586 A US3699586 A US 3699586A US 33466 A US33466 A US 33466A US 3699586D A US3699586D A US 3699586DA US 3699586 A US3699586 A US 3699586A
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United States
Prior art keywords
radiation
original
vibrating
copy
dimension
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
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US33466A
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English (en)
Inventor
Donald M Harvey
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Eastman Kodak Co
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Eastman Kodak Co
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Publication date
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    • 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
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
    • H04N1/195—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a two-dimensional array or a combination of two-dimensional arrays
    • H04N1/19505—Scanning picture elements spaced apart from one another in at least one direction
    • H04N1/19515—Scanning picture elements spaced apart from one another in at least one direction in two directions
    • 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
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
    • H04N1/195—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a two-dimensional array or a combination of two-dimensional arrays
    • H04N1/19505—Scanning picture elements spaced apart from one another in at least one direction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/24—Systems for the transmission of television signals using pulse code modulation
    • H04N7/52—Systems for transmission of a pulse code modulated video signal with one or more other pulse code modulated signals, e.g. an audio signal or a synchronizing signal
    • H04N7/54—Systems for transmission of a pulse code modulated video signal with one or more other pulse code modulated signals, e.g. an audio signal or a synchronizing signal the signals being synchronous

Definitions

  • ABSTRACT A copying device in which-the original is scanned by a radiation source, and the radiation reflected from the original is projected onto a plurality of radiation sensitive members electrically connected to corresponding conducting elements.
  • the conducting elements transmit current to an electrically conducting copy paper which is sensitive to current and/or heat to form images on the copy paper.
  • the elements conduct a varying current in proportion to the radiation impinging on the radiation sensitive members for producing a copy locally or remotely of the original on the current and/or heat sensitive copy paper.
  • This invention relates generally to copying devices, and more specifically to a copying device in which a copy of an irradiated original is locally or remotely formed on an electrical current and/or heat sensitive copy paper.
  • facsimile devices for transmitting and receiving images.
  • a stylus For facsimile reception, a stylus is moved back and forth across the surface of a copy paper in slight pressure contact therewith and transmits electrical pulses to the paper in accordance with the image being transmitted.
  • the electrical impulses generate heat in the particular areas in which they contact the copy paper to form images on the copy paper.
  • facsimile devices are satisfactory for the transmission and reception of images, the concepts involved therein are not adaptable to a high speed copying device in which an original is fed into the machine and a copy simultaneously removed therefrom locally or remotely.
  • Such facsimile devices have the disadvantage of being slow since the stylus must move back and forth across the surface of the paper.
  • This invention includes within its scope copying devices in which the original is scanned by a radiation source, and the radiation from the original is projected onto a plurality of radiation sensitive members electrically connected to corresponding electrical conducting elements.
  • the conducting elements transmit current to an electrically conducting copying paper which is sensitive to an electrical current and/or heat in proportion to the radiation impinging on the radiation sensitive members.
  • the copying paper is subjected to the current in a varying dot pattern conforming to the radiation to produce a copy of the original.
  • the original is scanned on a line-by-line basis, and the conducting elements are located in spaced, parallel alignment with a copy paper support platen to form a passageway therebetween.
  • the heat and/or electrical current sensitive copy paper is transported through the passageway and into engagement with the conducting elements to complete an electrical circuit connected to an alternating potential. Completion of the electrical circuit by the paper results in a current flow through the conducting elements and paper which is dependent upon the radiation received from the original by the radiation sensitive members.
  • the current flow through the conducting elements and paper causes a change in appearance, such as a color change, to take place in the heat and/or electrical current sensitive copy paper to form a copy of the original.
  • Another object of the invention is to provide a copying device that is of simple design and construction, thoroughly reliable and efficient in operation, and economical to manufacture.
  • Another object of the invention is to provide a copying device capable of producing half-tone copies of an original.
  • FIG. 1 is a perspective view partly in section of one embodiment of the copying device of this invention
  • FIG. 2 is a schematic view of the copying device of FIG. 1 showing the electrical circuit for producing a positive copy of the original;
  • FIG. 3 is a schematic view similar to FIG. 2 showing the electrical circuit for producing a negative copy of the original
  • FIG. 4 is a schematic view similar to FIG. 2 showing an electrical circuit for producing a half-tone copy of the original
  • FIG. 5 is a segmental view in perspective of the radiation sensing means of the copying device
  • FIG. 6 is an enlarged segmental view of a portion of the radiation sensing means of FIG. 5;
  • FIG. 7 is a side elevational view in section of another embodiment of this invention.
  • FIG. 8 is a section view taken along line 8-8 of FIG. 7 and showing a portion of the radiation sensing means broken away.
  • One embodiment of the copying device 10 of this invention comprises a housing having side walls 12, only one of which is shown in FIG. 1, for rotatably supporting the ends of opposed pressure transport rollers 14 for transporting an original 16 across an exposure slit 18 formed in the top wall 20 of the device 10.
  • the front and rear walls 22, 24 respectively of the device 10 further support a reflector unit 26 to which a radiation means such as lamp bank 28 is secured for irradiating or exposing the original 16 as it is transported across exposure slit 18.
  • the original 16 is preferably fed across exposure slit 18 with the information on the original facing the radiation source 28.
  • the radiation reflected from each line of information on the original varies by virtue of the difference in density of the line of information, the dark or black type or characters being not as reflective as the white background.
  • the varying radiation is focused by an objective lens 30 mounted in a plate 32 supported by the device 10 onto a plurality of radiation sensitive members such as photocells 34, as best seen in FIGS. 4 and 5, for
  • the photocells 34 are supported by an insulator bracket 36 secured to device by leaf springs 38 in spaced, parallel relationship to exposure slit 18.
  • Each of the radiation sensitive members 34 is electrically connected to a member such as a needle 40 mounted in bracket 36 in the form of a thin wire or a ribbon of metal preferably made of a composition customarily employed for resistance heating units operating at high temperature.
  • needles 40 are mounted in close proximity to photocells 34, since the only connection therebetween is electrical, they could be separated, withthe photocells and related irradiating apparatus at one location, and the v needles and associated copy paper holding apparatus at paper such as a gelatin coated white paper soaked with a salt water solution to make it electrically conductive, and of the type which changes appearance, such as a color change, when subjected to current flow and/or heat.
  • the copy paper 42 is transported by any suitable opposed rollers 46 and guides 48 through an entry slit 50 in the rear wall 24 of the device 10.
  • the device may be provided with a tray 52 adjacent the entry slit 50 for preferably holding an electrolyte solution through which the copying paper 42 may be guided by any suitable guiding means, not shown, prior to its transport through the copying device 10 for coating or impregnating the paper with an electrically conducting solution such as an electrolyte.
  • the paper may be provided with a solid electrolyte coated thereon with the gelatin.
  • the electrolyte may be provided in a capsule secured to the paper, the electrolyte contained therein being spread on the paper when the capsule is crushed upon passage through a pair of opposed rollers or the like.
  • Power is connected to the radiation sensitive members 40 through a bus bar 54 electrically connected to members 40 and secured to bracket 36.
  • bracket 36 is supported by leaf springs 38 which are secured to bracket 36 through insulator plates 56.
  • a potential such as a 115 volt 60 hz. alternating current source is connected via the bus bar 54 to radiation sensitive members 34, and the current output thereof connected to needles 40.
  • the support platen 44 is preferably connected to ground potential.
  • the radiation sensitive members 34 conduct current modulated in proportion to the radiation to which they are subjected, a dark image on original 16 will not reflect too much radiation causing the corresponding radiation sensitive member 34 to conduct very little current, if any, with the result that a change in appearance in the copy paper 42 does not occur.
  • a light portion of the original 16 will reflect considerable radiation onto a corresponding radiation sensitive member 34 causing it to conduct sufficiently to cause a change in appearance in the portion of the copy paper 42 with which it is in contact.
  • One theory is that the change in appearance in the copy paper is due to the heat generated in the paper due to its inherent resistance rather than to the heat generated in the needle.
  • the needles 40 will form an image line in the paper 42 that is a copy of the image line on the original 16. Whether a negative or positive copy is obtained depends on how an AC amplifier and resistor circuit 58 are connected into the circuit. With the circuit in FIG. 2, a positive copy is obtained whereas with the circuit of FIG. 3, a negative copy is obtained.
  • the transport rollers 14, 46 for the original and copy paper respectively are drivingly connected together by belts 60 as seen in FIG. 2, and are driven by any suitable motor 62 so that the original and copy paper are transported in proper synchronization and in opposite directions.
  • Any known switch such as switch 59 shown in FIG. 2, may be provided to connect the radiation source 28 and transport motor 62 to a power source, and to disconnect them following completion of a copying cycle.
  • Switch 59 may preferably remain in a normally open position and be closed upon movement of one of the rollers 14 when an original 16 is inserted into the nip of the rollers and transported therethrough. When the original 16 is transported all the way through the rollers 14, switch 59 will automatically open upon return of the rollers 14 into pressure engagement, disconnecting the power to the radiation source 28 and transport motor 62.
  • the bracket 36 supporting the radiation sensitive photocells 34 and needles 40 may be vibrated preferably at twice the power frequency or hertz by any suitable means such as a solenoid 64 as seen in FIGS. 2 and 5 in a direction transverse to the paper travel a distance substantially equal to the pitch of the needles 40 (distance between two successive needles) so that the needles will cover the entire paper surface in the shortest possible time.
  • any suitable means such as a solenoid 64 as seen in FIGS. 2 and 5 in a direction transverse to the paper travel a distance substantially equal to the pitch of the needles 40 (distance between two successive needles) so that the needles will cover the entire paper surface in the shortest possible time.
  • the greater the number of needles 40 and photocells 34 used the faster the paper surface can be covered and a copy produced of the original.
  • a half-tone copy can be produced. This may be accomplished as seen in FIG.
  • the voltage required is proportional to the needle speed. Accordingly, as the number of needles 40 used is increased, the needle speed that is necessary is decreased, and the voltage required to operate the copying device is decreased.
  • the entire original 16. is irradiated by a radiation source 28', and the reflected image or radiation focused by any suitable lens system 30' onto a plurality of radiation sensitive photocells 34 only a portion of which are shown in FIG. 8, arranged to receive all of the radiation from the original.
  • the photocells 34' are connected to corresponding needles 40.
  • a copy paper 42' is manually moved through an entry door 65 and placed on a pivotally mounted support platen 67 which is moved to a latched copying position as shown in full lines, in which the copy paper is held in engagement with the needles 40'.
  • any suitable 7 transport means 68 such as a solenoid must be provided (See FIG. 7) to move the bracket 36' longitudinally of the paper through the longitudinal distance between the needles 40'.
  • a. radiation sensing means located with respect to said irradiating station to receive the radiation image from the original for producing an electrical image signal corresponding to a received radiation signal
  • copying station means for receiving a copy medimeans adjacent said copying station for transmitting the electrical image signal to the copy medium and including a plurality of electrically conductive members;
  • support means for supporting the plurality of electrically conductive members which are spaced a first distance apart in a first dimension with respect to the copy medium and which are spaced a second distance apart in a second dimension with respect to the copy medium;
  • first vibrating means for vibrating said support means in said first dimension a distance substantially equal to said first distance
  • second vibrating means operating in timed relation to said first vibrating means for vibrating said support means in said second dimension a distance substantially equal to said second distance.
  • said radiation sensing means comprises a plurality of photoreceptors each adapted to provide a signal, the totality of said photoreceptor signals comprising said electrical image signal, and wherein said plurality of electrically conductive members comprise discharge means that are electrically connected to said plurality of photoreceptors for receiving the varying signals therefrom.
  • the apparatus of claim 1 including:
  • conductor means for supplying said rectified AC voltage to said radiation sensing means
  • interruptor means connected between said rectifier means and said conductor means for interrupting the rectified AC voltage supplied to said sensing means at a frequency proportional to the voltage of said rectified voltage.
  • radiation sensing means for producing an electrical image signal proportional to the radiation sensed
  • first support means for supporting a copy medium with respect to said radiation sensing means such that the image signal from said radiation sensing means is electrically transmitted to the copy medium to form a copy corresponding to the original, the improvement in said radiation sensing means comprising:
  • second support means for supporting said plurality of electrically conductive members which are spaced a first distance apart in a first dimension with respect to the copy medium and which are spaced a second distance apart in a second dimension with respect to the copy medium;
  • first vibrating means for vibrating said second support means in said first dimension with respect to the copy medium a distance substantially equal to said first distance
  • second vibrating means operating in timed relation to said first vibrating means for vibrating said support means in said second dimension a distance substantially equal to said second distance.
  • said radiation sensing means comprises a plurality of photoreceptors each providing a signal, the totality of said photoreceptor signals comprising said electrical signal image and wherein said plurality of electrically conductive members comprise discharge means that are electrically connected to said plurality of photoreceptors to receive the signals therefrom.
  • a. radiation sensing means disposed to receive the radiation image from the original for producing an electrical image signal corresponding to the radiation image received
  • copying station means for receiving a copy medid. means adjacent said copying station means for transmitting the electrical image signal to the copy medium to form thereon a copy of the original, said means for transmitting including a plurality of electrically conductive members;
  • support means for supporting the plurality of electrically conductive members which are spaced a first distance apart in a first dimension with respect to the copy medium, and which are spaced a second distance apart in a second dimension with respect to the copy medium;
  • first vibrating means for vibrating said support means in said first dimension a distance substantially equal to said first distance and at a frequency which is an integral multiple of the predetermined frequency of said power means;
  • second vibrating means operating in timed relation to said first vibrating means for vibrating said support means in said second dimension a distance substantially equal to said second distance.
  • said radiation sensing means comp ises a plurality of photoreceptors each'providing a signal, the totality of said photoreceptor signals comprising said electrical image signal, and wherein said plurality of electrically conductive members comprise discharge means that are electrically connected to said plurality of photoreceptors for receiving the varying signals therefrom.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Facsimile Scanning Arrangements (AREA)
US33466A 1970-04-30 1970-04-30 Copying device including radiation sensitive members electrically responsive to the reflected image Expired - Lifetime US3699586A (en)

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US3346670A 1970-04-30 1970-04-30

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US3699586A true US3699586A (en) 1972-10-17

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US (1) US3699586A (enExample)
DE (1) DE7116876U (enExample)
FR (1) FR2090924A5 (enExample)

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FR2090924A5 (enExample) 1972-01-14
DE7116876U (de) 1971-09-09

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